CN109151929A

CN109151929A - Switching handling method, apparatus and system, the storage medium of network system

Info

Publication number: CN109151929A
Application number: CN201710466076.7A
Authority: CN
Inventors: 李振东; 朱进国; 卢飞
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-06-19
Filing date: 2017-06-19
Publication date: 2019-01-04
Anticipated expiration: 2037-06-19
Also published as: WO2018233445A1; CN109151929B

Abstract

The present invention provides a kind of switching handling methods of network system, apparatus and system, storage medium, wherein, the described method includes: AMF entity, which receives 4G network system, resets request to the forwarding of 5G network system, AMF selects conversation management functional SMF, and Packet Data Unit PDU session request is sent to the SMF of selection, wherein, the forwarding resetting request includes: 4G session information, the PDU session request includes: the 4G session information, the PDU session request is used to indicate the SMF and returns to the corresponding 5G session information of the 4G session information to the AMF, by adopting the above technical scheme, it solves in the related technology, due to postponing the problems such as big caused terminal is from 4G network system to 5G network system handover failure.

Description

Switching handling method, apparatus and system, the storage medium of network system

Technical field

The present invention relates to the communications fields, in particular to a kind of switching handling method of network system, device and are System, storage medium.

Background technique

Third generation affiliate (3rd Generation Partnership Project, referred to as 3GPP) is since R8 It formulates in forth generation long term evolution (Long Term Evolution, referred to as LTE) mobile communication system.Its network architecture is such as Shown in Fig. 1, the function of each network element is as follows in framework:

Terminal (User Equipment, referred to as UE), it is main that 4G network is accessed by radio open and is serviced, eventually End passes through the shifting of Non-Access Stratum signaling NAS (non-Access Stratum) and core net by eating dishes without rice or wine and base station interactive information Mobility management entity interaction information.

Base station (RAN, Radio Access Network, eNB), be responsible for accessing terminal to network interface-free resources scheduling and with And the connection management eated dishes without rice or wine.

Mobile management entity: core network control surface entity is mainly responsible for the authentication to user, authorization and signing and checks, The maintenance of user mobility management, Packet Data Network (Packet Data Network, referred to as PDN) connection and carrying, is used The functions such as triggering paging under the IDLE state of family.

Gateway Serving GW: core network user face functional entity is mainly responsible under roaming condition with PDN GW's Interaction.

Packet data gateway PDN GW: core network user face functional entity is the access point of terminal access PDN network, bears Distributing user IP address is blamed, the carrying of network-triggered is established, modifies and deleted, and is also had the function of QoS control charging etc., is user Anchor point in 3GPP system guarantees business continuance to guarantee that IP address is constant.In control and forward separating framework, P-GW is divided into 2 parts again, and one is controlled entity PGW-C, and one is user entity PGW-U.PGW-C is responsible for signaling control System, PGW-U are responsible for IP forwarding.

Home subscribed services device (HSS, Home Subscription Server): the signing information of user is stored.

Policy control and charging rule functions (PCRF, Policy and charging control function) are born Blame the formulation of strategic decision-making and charging regulation.PCRF provides the rule of the network-control based on business data flow, these network controls System includes the detection of business data flow, gate (Gating Control), service quality (Quality of Service, QoS) Control and the charging regulation based on data flow etc..The strategy and charging regulation that PCRF is formulated are sent to P-GW execution.

3GPP begins one's study next-generation communication system (NextGen System) from R14, and next-generation communication system can prop up Hold mobile broadband (Evolved Mobile Broadband, referred to as eMBB), the super large connection machine communication of evolution (Massive Machine Type Communication, referred to as mMTC), super reliable machine communicate (Ultra Reliable Machine Type Communication, referred to as uMTC) three kinds of types of service, these three types of service have different nets Network characteristic.Fig. 2 is next generation mobile communication network architecture schematic diagram, wherein the function of each network element is as follows:

UE mainly passes through next-generation radio open access network and is serviced, and terminal is believed by eating dishes without rice or wine with base station interaction Breath, passes through the public control plane function and session control face function interactive information of Non-Access Stratum signaling and core net.

Next-generation base station (NG RAN, Radio Access Network, gNB), responsible accessing terminal to network eat dishes without rice or wine to provide Source scheduling and and the connection management eated dishes without rice or wine.

Session control face function (Session Management Function, referred to as SMF): and terminal interaction, mainly It is responsible for processing user (Packet Data Unit, referred to as PDU) session establishment, modification and removal request, selects user face function Energy (User Plane function, referred to as UPF)；Establish the connection of the user face between UE to UPF；And policy control functions (Policy Control Function, referred to as PCF) together determine session quality of the conversation (Quality of Service, Referred to as QoS) functions such as parameter.

Access with mobility control function (Access and Mobility control Function, referred to as AMCF): being the public control plane function in core net.One only one AMCF of user is responsible for the authentication to user, authorization And signing is checked to ensure that user is legitimate user；User mobility management, including location registration and temporary identifier distribution；When When user initiates Packet Data Unit (Packet Data Unit, referred to as PDU) connection foundation request, selection is suitable SMF；Forward Non-Access Stratum (Non Access Stratum, referred to as NAS) signaling between UE and SMF；Repeating base station and SMF Between access layer (Access Stratum, referred to as AS) signaling.

UPF: providing user's surface treatment function, including data forwarding, QoS are executed.UPF also provides use when user's movement Family face anchor point guarantees business continuance.

PCF: provided function and the PCRF in 4G epoch are very similar.

Uniform data management function (Unified Data Management, referred to as UDM): the signing of user is stored Data, it is very similar with the HSS in 4G epoch.

The deployment of NextGen System (5G), starting can be in hot zones partial deployment, such as downtown, commercial center Deng with the movement of user, removing the coverage area of 5G system in UE access 5G system, it is necessary to how seamless solve Be switched in 4G system, otherwise session can generate interruption.

Fig. 3 is the network architecture for meeting the two-way switching of 4G<-->5G.Its central characteristics is the framework while compatible 4G With 5G framework.Its central characteristics is PGW-C and SMF unification, PGW-U and UPF unification, and PCF and PCRF unification, the user face of UE are begun It is anchored on UPF/PGW-U eventually.Authentication management function (Authentication Management Function, referred to as AMF) between MME, increase Nx interface, send switching request between cross-system over that interface.UE in this way is cut between LTE and 5G When changing, it can guarantee seamless switching.

In 4G system, UE and Web vector graphic bearer (bearing concept), each carrying represent corresponding Business Stream (Service flows) and its qos parameter.In 5G system, then the concept of QoS flow is used, each QoS flow includes Corresponding QoS profile and packet filter (packet filter).

Fig. 4 is the flow chart that 4G switches to 5G in the prior art, is mainly comprised the steps that

Step 400, terminal UE has been set up PDN connection in a 4 g system, may also set up dedicated hold It carries；

Step 401, source 4G RAN node (eNB) discovery needs to be switched to 5G, switching request is sent to MME, wherein carrying Target cell information；

Step 402, MME sends Forward Relocation to AMF according to switching request, selection target AMF Request, wherein PGW-C/SMF is carried, the address S-GW；

Step 403, AMF initiates PDU Session Handover to it according to the address SMF/PGW-C therein Request first issues vSMF in roaming scence, or deployment reason, the request；

Step 404, vSMF is requested to SMF/PGW-C forwarding PDU Session Handover Request；

Step 405: if deploying PCC, SMF can initiate PDU-CAN Session to PCF/PCRF Modification, to obtain the 5GS PCC rule of the PDU session after being switched to 5G.PCF/PCRF is not to this at this time PDU session directly applies 5GS PCC regular.

Step 406:TSMF/PGW-C initiates N4session modification to UPF/PGW-U, obtains uplink tunnel Information；

Step 407:SMF/PGW-C sends PDU Session Handover Response to AMF, awards wherein carrying The 5G Qos rule of power, the uplink tunnel information of EPS bearer Setup List, UPF/PGW-U, when existing in step 403 When vSMF, which is first sent to vSMF.

Step 408:vSMF selects a vUPF, initiates N4Session Establishment process.VSMF is UPF/ The uplink tunnel information of PGW-U is supplied to vUPF, and vUPF generates v-CN tunnel information (N3 uplink tunnel, N9 downlink tunnel), and Issue vSMF.VSMF forwards PDU Session Handover Response to AMF, wherein carrying the 5G Qos rule of authorization Then, the uplink tunnel information of EPS bearer Setup List, vUPF.

Step 409:AMF sends Handover Request and requests to give 5G RAN node, wherein at least contains PDU Session ID, corresponding QoS Profile, uplink tunnel information.

Step 410:5G RAN node sends Handover Request Acknowledge to AMF, wherein containing N3 Downlink tunnel information；

Step 411:AMF sends Modify PDU Session Request to SMF/PGW-C, wherein containing downlink N3 Tunnel information.When with the presence of vSMF, which is first sent to vSMF, and N3 downlink tunnel information is replaced with step by vSMF The N9 downlink tunnel information of 408 distribution, issues SMF/PGW-C.

Step 412:SMF/PGW-C sends Modify PDU Response to AMF.When there are vMSF, which is first sent out AMF is then forwarded to vSMF, vSMF.

Step 413:SMF/PGW-C establishes interim forwarding tunnel to UPF/PGW-U request；

Step 414:AMF sends Forward Relocation Response to MME, wherein containing Serving GW The information such as change indication, EPS Bearer Setup List, TEIDs；

Step 415:MME sends Create Indirect Data Forwarding Tunnel Request to S-GW, Interim forwarding tunnel is established in request.

Step 401~415, are handoff preparation phases, and below step is handover execution stage.

Step 416:MME send Handover Command to 4G RAN node wherein contain interim forwarding tunnel and Carry information

Step 417:4G RAN (eNB) sends Handover Command to UE, wherein containing the nothing of target 5G RAN Line information；

Step 418:UE accesses target 5G RAN node according to the 5G RAN wireless messages received, sends Handover Confirm gives 5G RAN node.

At this point, after downlink data reaches 4G RAN node, by forwarding tunnel through S-GW, PGW-U/UPF, vUPF, 5G RAN node reaches UE；

Step 419:5G RAN node sends Handover Notify to AMF

Step 420:AMF sends Forward Relocation Complete Notification message to MME, confirmation Switching is completed.

Step 421:AMF sends Handover Complete message to SMF/PGW-C.It, should when with the presence of vSMF Message is first sent to vSMF..

The step 422:SMF/PGW-C tunnel information of vUPF update UPF/PGW-U. at this time UPF/PGW-U lower line number According to being sent to target side (vUPF).

Step 423:SMF/PGW-C sends Handover Complete Ack to AMF.

Subsequent step further includes UE in 5G network initiation register flow path, and MME discharges 4G Internet resources.

Above-mentioned process is a PDN connection to be switched to the process of 5G PDU session.When there is multiple PDN When connection, process be it is similar, the main distinction is:

Step 403, it needs to send PDU session handover to the SMF/PGW-C of each PDN connection request；

Step 408, after needing to receive all responses, step of initiating 409；

Step 411, it needs to send Modify PDU session to the SMF/PGW-C of each PDN connection request；

Step 412, after needing to receive all responses, to 414 message of MME sending step；

Step 421, it needs to send Handover Complete to each SMF/PGW-C.

In above-mentioned process, what AMF was received from MME is the switching request of 4G system, and AMF is unrelated with conversation management functional Network element needs to inquire the session information in 5G system to SMF/PGW-C, pre- to 5G RAN node after receiving all responses Stay resource.

However, above-mentioned switching flow there is a problem of it is very big.When some special scenes (such as Home routed scene) Under, for AMF in visited network, SMF/PGW-C has very big delay in home network.It is easy to cause handover failure in this way.Furthermore Due to using many signalings, the media path of 5G RAN node-vUPF-UPF/PGW-U is established in target 5G network in advance, such as Fruit handover failure will cause very big signaling waste, and these resources also need additional signaling to discharge.

For above-mentioned technical problem in the related technology, not yet put forward effective solutions.

Summary of the invention

The embodiment of the invention provides a kind of switching handling method of network system, apparatus and system, storage mediums, so that It solves the above problems less.

According to one embodiment of present invention, a kind of switching handling method of network system is provided, comprising:

Authentication management function AMF entity receives the forwarding resetting request that 4G network system is sent to 5G network system, wherein The forwarding resetting request includes: 4G session information；

The AMF selects conversation management functional SMF, and sends Packet Data Unit PDU session request to the SMF of selection, Wherein, the PDU session request includes: the 4G session information, and the PDU session request is used to indicate the SMF to described AMF returns to the corresponding 5G session information of the 4G session information.

Optionally, after the AMF sends Packet Data Unit PDU session request to the SMF of selection, the method is also wrapped It includes:

The AMF receives the SMF that SMF is returned and handles the 5G session information that the 4G session information obtains；With/ Or

The AMF notifies the 4G network system to resource needed for the reserved switching in the base station of the 5G network system Resource needed for switching has reserved success.

Optionally, the method also includes:

After the switching confirmation message that the base station of the 5G network system receives that the terminal is sent, the AMF is received Base station and the user face function of the 5G network system are established in the switching notice that the base station of the 5G network system is sent, request The channel of energy entity, wherein the user plane functions entity refers to that the conjunction of user plane functions entity UPF and PGW-U set function, Or, SMF and PGW-C closes the user plane functions entity for setting function control；And/or

Before the switching confirmation message that the base station of the 5G network system receives that the terminal is sent, the AMF exists After receiving the 5G session information, the base station of the 5G network system and the channel of the user plane functions entity are established in request, Wherein, the user plane functions entity refers to that the conjunction of user plane functions entity UPF and PGW-U set function, or, SMF and PGW-C is closed If the user plane functions entity of function control.

Optionally, the SMF includes: the first SMF, the 2nd SMF, the 3rd SMF, and the AMF receives the described of SMF return SMF handles the 5G session information that the 4G session information obtains at least through following manner:

First SMF is locally derived by the 5G session information according to the 4G session information received；Or

The 5G session information is sent to the first SMF by the 2nd SMF, wherein the first SMF is being received After the session request that the AMF is sent, the 5G session information is fed back to the AMF.

Optionally, the method also includes:

The 5G session information is sent to the first SMF by the 3rd SMF, wherein the first SMF receive it is described After the session request that AMF is sent, the 5G session information is fed back to the AMF, in the first SMF and the 4G network system S-GW be close set network element.

According to another embodiment of the invention, a kind of switching handling method of network system is additionally provided, comprising:

First conversation management functional SMF receives the PDU session request that authentication management function AMF is sent, wherein the PDU Session request includes: the 4G session information；

First SMF handles the 5G session information that the 4G session information obtains at least through following manner:

The 5G session information is locally derived by according to the 4G session information received；Or

The 5G session information that the 2nd SMF is sent is received, after receiving the session request that the AMF is sent, to described AMF feeds back the 5G session information.

According to another embodiment of the invention, a kind of switch processing device of network system is additionally provided, applied to recognizing It demonstrate,proves in management function AMF entity, comprising:

First receiving module resets request to the forwarding of 5G network system for receiving 4G network system, wherein described turn Hair resetting request includes: 4G session information；

Selecting module sends Packet Data Unit PDU session for selecting conversation management functional SMF, and to the SMF of selection Request, wherein the PDU session request includes: the 4G session information, the PDU session request be used to indicate the SMF to The AMF returns to the corresponding 5G session information of the 4G session information.

Optionally, described device further include:

Second receiving module, the SMF for being also used to receive SMF return handle the 5G that the 4G session information obtains Session information；And/or

Reserved module, for the resource required to the reserved switching in the base station of the 5G network system；

Notification module has reserved success for resource needed for notifying the 4G network system switching.

According to another embodiment of the invention, a kind of switch processing device of network system is additionally provided, meeting is applied to Talk about management function SMF, comprising:

Third receiving module, for receiving the PDU session request of authentication management function AMF transmission, wherein the PDU meeting Words request includes: the 4G session information；

Processing module, for handling the 5G session information that the 4G session information obtains at least through following manner:

According to another embodiment of the invention, a kind of switching processing system of network system is additionally provided, comprising:

Authentication management function AMF entity resets request, selection to the forwarding of 5G network system for receiving 4G network system Conversation management functional SMF, and Packet Data Unit PDU session request is sent to the SMF of selection, wherein the forwarding resetting is asked Asking includes: 4G session information, and the PDU session request includes: the 4G session information；

The SMF, for returning to the corresponding 5G session information of the 4G session information to the AMF.

Optionally, the AMF, be also used to receive SMF return the SMF handle the 4G session information obtain it is described 5G session information；And/or it is also used to resource needed for the reserved switching in the base station of the 5G network system, and notify the 4G net Resource needed for the switching of network system has reserved success.

Optionally, after the switching confirmation message that the base station of the 5G network system receives that the terminal is sent,

The AMF, is also used to receive the switching notice that the base station of the 5G network system is sent, and the 5G net is established in request The channel of the base station of network system and the user plane functions entity, wherein the user plane functions entity refers to user plane functions The conjunction of entity UPF and PGW-U set function or SMF and PGW-C closes the user plane functions entity for setting function control；And/or

Before the switching confirmation message that the base station of the 5G network system receives that the terminal is sent, the AMF, also For after receiving the 5G session information, request establish the base station of the 5G network system with the user plane functions entity Channel, wherein the user plane functions entity refer to the conjunction of user plane functions entity UPF and PGW-U set function or SMF with PGW-C closes the user plane functions entity for setting function control.

Optionally, the SMF includes: the first SMF, the 2nd SMF, the 3rd SMF,

First SMF is also used to locally be derived by the 5G session information according to the 4G session information；And/or

2nd SMF is also used to the 5G session information being sent to the first SMF, wherein the first SMF After receiving the switching request that the AMF is sent, the 5G session information is fed back to the AMF；

Optionally, the 3rd SMF is also used to the 5G session information being sent to the first SMF, wherein described One SMF feeds back the 5G session information, the first SMF after receiving the session request that the AMF is sent, to the AMF It is to close to set network element with the S-GW in the 4G network system.

According to another embodiment of the invention, a kind of storage medium is additionally provided, the storage medium includes storage Program, wherein the switching handling method of network system described in any of the above item is executed when described program is run.

According to another embodiment of the invention, a kind of processor is additionally provided, the processor is used to run program, In, the switching handling method of network system described in any of the above item is executed when described program is run.

Through the invention, authentication management function AMF entity receives 4G network system and asks to the forwarding of 5G network system resetting It asks, AMF selects conversation management functional SMF, and sends Packet Data Unit PDU session request to the SMF of selection, wherein described Forwarding resetting request includes: 4G session information, and the PDU session request includes: the 4G session information, and the PDU session is asked It asks and is used to indicate the SMF to the corresponding 5G session information of the AMF return 4G session information, using above-mentioned technical side Case solves in the related technology, since terminal caused by postponing greatly is from 4G network system to 5G network system handover failure, and Due to using many signalings, the media path of 5G RAN node-vUPF-UPF/PGW-U is established in target 5G network in advance, such as Fruit handover failure will cause the problem of very big signaling wastes, and then simplify terminal from 4G network system to 5G network system The handoff procedure of system.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:

Fig. 1 is EPC architecture diagram in the prior art；

Fig. 2 is NextGen system architecture diagram in the prior art

Fig. 3 is 4G network system and 5G network system switching architecture figure in the prior art；

Fig. 4 be in the prior art 4G network system to the switching flow figure of 5G network system

Fig. 5 is the flow chart of the switching handling method of network system according to an embodiment of the present invention；

Fig. 6 is the structural block diagram of the switch processing device of network system according to an embodiment of the present invention；

Fig. 7 is an optional structural block diagram of the switch processing device of network system according to an embodiment of the present invention；

Fig. 8 is another flow chart according to the switching handling method of the kind network system of the embodiment of the present invention；

Fig. 9 is another structural block diagram of the switch processing device of network system according to an embodiment of the present invention；

Figure 10 is the structural block diagram according to the switching processing system of the network system of the embodiment of the present invention；

Figure 11 is the implementation flow chart that UPF relocation does not occur according to the preferred embodiment of the present invention；

Figure 12 is the implementation flow chart according to the preferred embodiment of the invention that UPF relocation occurs；

Figure 13 is the embodiment schematic diagram for establishing target side medium surface of the preferred embodiment of the present invention；

Figure 14 is the implementation flow chart that vSMF dynamic according to the present invention in preferred embodiment obtains 5G session information；

Figure 15 is the process of SMF/PGW-C initiation Qos stream modification after the completion of switching according to the preferred embodiment of the invention Figure；

Figure 16 is acquisition 5G session information according to the preferred embodiment of the invention, the implementation flow chart of reallocation forwarding surface.

Specific embodiment

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.

It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, " Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.

Embodiment 1

A kind of switching handling method of network system is provided in the present embodiment, and Fig. 5 is according to an embodiment of the present invention The flow chart of the switching handling method of network system, as shown in figure 5, the process includes the following steps:

Step S102, AMF entity receives 4G network system and resets request to the forwarding of 5G network system, wherein above-mentioned turn Hair resetting request includes: 4G session information；

Step S104, above-mentioned AMF selects conversation management functional SMF, and sends Packet Data Unit PDU to the SMF of selection Session request, wherein above-mentioned PDU session request includes: above-mentioned 4G session information, and above-mentioned PDU session request is used to indicate above-mentioned SMF returns to the corresponding 5G session information of above-mentioned 4G session information to above-mentioned AMF.

Above-mentioned each step through the invention, AMF entity receive 4G network system and reset to the forwarding of 5G network system Request, AMF selects conversation management functional SMF, and sends Packet Data Unit PDU session request to the SMF of selection, wherein on Stating forwarding resetting request includes: 4G session information, and above-mentioned PDU session request includes: above-mentioned 4G session information, above-mentioned PDU session Request is used to indicate above-mentioned SMF and returns to the corresponding 5G session information of above-mentioned 4G session information to above-mentioned AMF, using above-mentioned technical side Case solves in the related technology, since terminal caused by postponing greatly is from 4G network system to 5G network system handover failure, and Due to using many signalings, the media path of 5G RAN node-vUPF-UPF/PGW-U is established in target 5G network in advance, such as Fruit handover failure will cause the problem of very big signaling wastes, and then simplify terminal from 4G network system to 5G network system The handoff procedure of system.

It should be noted that the SMF in the embodiment of the present invention can include but is not limited to: SMF-T；SMF-f；SMF and PGW-C closes the conjunction being located at together and sets body.

Optionally, after AMF sends Packet Data Unit PDU session request to the SMF of selection, the above method further include:

AMF receives the above-mentioned SMF that SMF is returned and handles the above-mentioned 5G session information that above-mentioned 4G session information obtains；And/or

AMF notifies above-mentioned 4G network system to switch to resource needed for the reserved switching in the base station of above-mentioned 5G network system Required resource has reserved success.

In embodiments of the present invention, the switching confirmation letter that the terminal is sent is received in the base station of the 5G network system After breath, the AMF receives the switching notice that the base station of the 5G network system is sent, and the base of the 5G network system is established in request Stand with the channel of the user plane functions entity, wherein the user plane functions entity refer to user plane functions entity UPF and The conjunction of PGW-U sets function, or, SMF and PGW-C closes the user plane functions entity for setting function control；And/or

Optionally, the SMF includes: the first SMF (can be understood as SMF-T), and the 2nd SMF ((can be understood as SMF The entity set is closed with PGW-C), the 3rd SMF (can be understood as SMF and PGW-C and close the entity set), and the AMF receives SMF and returns The SMF returned handles the 5G session information that the 4G session information obtains at least through following manner:

First SMF is locally derived by the 5G session information according to the 4G session information；Or

It is established in PDN connection procedure in the 4G network system, the 5G session information is sent to institute by the 2nd SMF State the first SMF, wherein the first SMF feeds back the 5G after receiving the switching request that the AMF is sent, to the AMF Session information；Or

The 5G session information is sent to the first SMF by the 3rd SMF, wherein the first SMF receive it is described After the session request (switching request is also a kind of session request) that AMF is sent, the 5G session information is fed back to the AMF, In the 4G network system, the first SMF and S-GW is to close to set network element.

Brief explanation is carried out to above-mentioned process below in conjunction with an example:

In 4G in the handoff procedure into 5G system, AMF receives 4G system switching request, contains 4G meeting in switching request It talks about information (having may also contain S-GW, the address PGW-C).AMF selects a forwarding SMF-F, sends switching request.SMF-F (phase When in the 2nd SMF of above-described embodiment) the corresponding session information in 5G system is returned, wherein may including interim forwarding tunnel Road information；

After AMF receives session information, after the completion of reserving resource to target 5G RAN node, 4G network is notified；

After the completion of receiving the switching of UE, 5G RAN node initiates path switching request to AMF；

For AMF using the session information in switching request, the medium surface for establishing target 5G RAN node and UPF/PGW-U is logical Road.

Further, SMF-F acquisition method of corresponding session information in 5G system includes:

After SMF-F receives switching request, according to the session information of 4G, the session information in 5G system is locally derived；Or

In the framework of the present embodiment, S-GW and vSMF are that a conjunction sets network element.PDN is established in 4G system It during connection, establishes during special feature, corresponding 5G system session information is passed through SMF and vSMF by SMF/PGW-C Between interface be sent to vSMF.After AMF receives switching request, vSMF identical with the address S-GW is selected to send switching request； Or

UE is after 4G system establishes PDN connection, and SMF selects a vSMF in 5G, dynamically by corresponding 5G system System session information, is sent to vSMF.After AMF receives switching request, the vSMF is selected to send switching request.SMF/PGW-C and AMF It needs using identical rule, to guarantee to select identical vSMF.Specific selection rule, such as using same rule the IP of UE The IMSI of address or UE are mapped on a vSMF.

Further, in the handoff procedure of path, 5G session information is supplied to SMF/PGW-C by vSMF, when SMF-PGW-C has found Session information mapping is wrong, and SMF/PGW-C initiates QoS flow and modifies process, completes the handoff procedure of system.

Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation The method of example can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but it is very much In the case of the former be more preferably embodiment.Based on this understanding, technical solution of the present invention is substantially in other words to existing The part that technology contributes can be embodied in the form of software products, which is stored in a storage In medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, calculate Machine, server or network equipment etc.) execute the above-mentioned method of each embodiment of the present invention.

Embodiment 2

A kind of switch processing device of network system is additionally provided in the present embodiment, and the device is for realizing above-mentioned implementation Example, the descriptions that have already been made will not be repeated.As used below, the software of predetermined function may be implemented in term " module " And/or the combination of hardware.Although device described in following embodiment is preferably realized with software, hardware or soft The realization of the combination of part and hardware is also that may and be contemplated.

Fig. 6 is the structural block diagram of the switch processing device of network system according to an embodiment of the present invention, as shown in fig. 6, packet It includes:

1) the first receiving module 60 resets request to the forwarding of 5G network system for receiving 4G network system, wherein on Stating forwarding resetting request includes: 4G session information；

2) selecting module 62 send Packet Data Unit PDU for selecting conversation management functional SMF, and to the SMF of selection Session request, wherein above-mentioned PDU session request includes: above-mentioned 4G session information, and above-mentioned PDU session request is used to indicate above-mentioned SMF returns to the corresponding 5G session information of above-mentioned 4G session information to above-mentioned AMF.

The effect of above-mentioned module through the invention, AMF entity receive forwarding weight of the 4G network system to 5G network system Request is set, AMF selects conversation management functional SMF, and sends Packet Data Unit PDU session request to the SMF of selection, wherein Above-mentioned forwarding resetting request includes: 4G session information, and above-mentioned PDU session request includes: above-mentioned 4G session information, above-mentioned PDU meeting Words request is used to indicate above-mentioned SMF and returns to the corresponding 5G session information of above-mentioned 4G session information to above-mentioned AMF, using above-mentioned technology Scheme solves in the related technology, since terminal caused by postponing greatly is from 4G network system to 5G network system handover failure, with And due to using many signalings, the media path of 5G RAN node-vUPF-UPF/PGW-U is established in target 5G network in advance, If handover failure, the problem of very big signaling wastes will cause, and then simplify terminal from 4G network system to 5G network The handoff procedure of system.

Fig. 7 is an optional structural block diagram of the switch processing device of network system according to an embodiment of the present invention, such as Shown in Fig. 7, above-mentioned apparatus further include:

Second receiving module 64, be also used to receive SMF return above-mentioned SMF handle above-mentioned 4G session information obtain it is above-mentioned 5G session information；And/or

Reserved module 66, for the resource required to the reserved switching in the base station of above-mentioned 5G network system；

Notification module 68 has reserved success for resource needed for notifying above-mentioned 4G network system switching.

Optionally, the second receiving module 64 is also used to receive the switching notice that the base station of above-mentioned 5G network system is sent, and Under the triggering of above-mentioned switching notice, base station and the institute of above-mentioned 5G network system are established according to the above-mentioned 5G session information received State the channel of user plane functions entity, wherein the user plane functions entity refers to user plane functions entity UPF and PGW-U Conjunction sets function, or, SMF and PGW-C closes the user plane functions entity for setting function control；Or

Module 70 is established, for the above-mentioned 5G session information that directly basis receives, and according to the above-mentioned 5G meeting received Words information establishes the base station of above-mentioned 5G network system and the channel of the user plane functions entity, wherein the user plane functions Entity refers to that the conjunction of user plane functions entity UPF and PGW-U set function, or, SMF and PGW-C closes the user face for setting function control Functional entity.

Embodiment 3

According to another embodiment of the invention, Fig. 8 is the hand-off process according to the kind network system of the embodiment of the present invention Another flow chart of method, as shown in Figure 8, comprising:

Step S202, SMF receive the PDU session request that authentication management function AMF is sent, wherein the PDU session request It include: the 4G session information；

Step S204, SMF handle the 5G session information that the 4G session information obtains at least through following manner:

By above-mentioned each step, SMF receives the PDU session request that authentication management function AMF is sent, and the SMF is at least The 5G session information that the 4G session information obtains is handled in the above manner solves phase by adopting the above technical scheme In the technology of pass, due to postponing big caused terminal from 4G network system to 5G network system handover failure, and due to using very More signalings establish the media path of 5G RAN node-vUPF-UPF/PGW-U in target 5G network in advance, if switching is lost The problem of losing, having will cause very big signaling waste, and then terminal is simplified from 4G network system to the switching of 5G network system Process.

In embodiments of the present invention, the 5G session information is sent to the first SMF, wherein the first SMF exists After receiving the session request that the AMF is sent, the 5G session information, the first SMF and 4G are fed back to the AMF S-GW in network system is to close to set network element.

Embodiment 4

Fig. 9 is another structural block diagram of the switch processing device of network system according to an embodiment of the present invention, such as Fig. 9 institute Show, comprising:

Third receiving module 90, for receiving the PDU session request of authentication management function AMF transmission, wherein the PDU Session request includes: the 4G session information；

Processing module 92 is believed for handling the 5G session that the 4G session information obtains at least through following manner Breath:

The 5G session information that the 2nd SMF is sent is received, after receiving the session request that the AMF is sent, to described AMF feeds back the 5G session information.By the comprehensive function of above-mentioned modules, SMF receives what authentication management function AMF was sent PDU session request, the SMF handle the 5G session information that the 4G session information obtains at least through with upper type, adopt With above-mentioned technical proposal, solve in the related technology, due to postponing big caused terminal from 4G network system to 5G network system Handover failure, and due to using many signalings, 5G RAN node-vUPF-UPF/PGW-U is established in target 5G network in advance Media path, if handover failure, the problem of having will cause very big signaling waste, and then simplify terminal from 4G network system It unites to the handoff procedure of 5G network system.

Processing module 92 is also used to the 5G session information being sent to the first SMF, wherein the first SMF exists After receiving the session request that the AMF is sent, the 5G session information, the first SMF and 4G are fed back to the AMF S-GW in network system is to close to set network element.

Embodiment 5

In embodiments of the present invention, a kind of switching processing system of network system is additionally provided, Figure 10 is according to the present invention The structural block diagram of the switching processing system of the network system of embodiment, as shown in Figure 10, comprising:

Authentication management function AMF entity 80 resets request, choosing to the forwarding of 5G network system for receiving 4G network system Conversation management functional SMF is selected, and sends Packet Data Unit PDU session request to the SMF of selection, wherein above-mentioned forwarding resetting Request includes: 4G session information, and above-mentioned PDU session request includes: above-mentioned 4G session information；

Above-mentioned SMF 82, for returning to the corresponding 5G session information of above-mentioned 4G session information to above-mentioned AMF.

The interaction of the switching processing system of network system through the embodiment of the present invention, AMF entity receive 4G network system It resets and requests to the forwarding of 5G network system, AMF selects conversation management functional SMF, and sends packet data list to the SMF of selection First PDU session request, wherein above-mentioned forwarding resetting request includes: 4G session information, and above-mentioned PDU session request includes: above-mentioned 4G Session information, above-mentioned PDU session request are used to indicate above-mentioned SMF and return to the corresponding 5G meeting of above-mentioned 4G session information to above-mentioned AMF Information is talked about, by adopting the above technical scheme, is solved in the related technology, due to postponing big caused terminal from 4G network system to 5G Network system handover failure, and due to using many signalings, 5G RAN node-vUPF- is established in target 5G network in advance The media path of UPF/PGW-U will cause the problem of very big signaling wastes, and then simplify terminal if handover failure From 4G network system to the handoff procedure of 5G network system.

Optionally, above-mentioned AMF, be also used to receive SMF return above-mentioned SMF handle above-mentioned 4G session information obtain it is above-mentioned 5G session information；And/or it is also used to resource needed for the reserved switching in the base station of above-mentioned 5G network system, and notify above-mentioned 4G net Resource needed for the switching of network system has reserved success.

The AMF, is also used to receive the switching notice that the base station of the 5G network system is sent, and the 5G net is established in request The channel of the base station of network system and the user plane functions entity, wherein user plane functions entity refers to user plane functions entity The conjunction of UPF and PGW-U sets function, or, SMF and PGW-C closes the user plane functions entity for setting function control；And/or

Before the switching confirmation message that the base station of the 5G network system receives that the terminal is sent, the AMF, also For after receiving the 5G session information, request establish the base station of the 5G network system with the user plane functions entity Channel, wherein user plane functions entity refers to that the conjunction of user plane functions entity UPF and PGW-U set function, or, SMF and PGW- C closes the user plane functions entity for setting function control.

Optionally, the SMF includes: the first SMF, the 2nd SMF, the 3rd SMF,

2nd SMF is also used to the 5G session information being sent to the first SMF, wherein the first SMF After receiving the session request that the AMF is sent, the 5G session information is fed back to the AMF.

Optionally, the 3rd SMF is also used to the 5G session information being sent to the first SMF, wherein described First SMF feeds back the 5G session information after receiving the session request that the AMF is sent, to the AMF, in the 4G net In network system, the first SMF and S-GW is to close to set network element.

In embodiments of the present invention, a kind of processor is additionally provided, the processor is for running program, wherein described The switching handling method of network system described in any of the above item is executed when program is run.

It is illustrated below with reference to preferred embodiment, preferred embodiment below combines above-described embodiment and its preferred implementation Mode.

Preferred embodiment one

Figure 11 is the implementation flow chart that UPF relocation does not occur according to the preferred embodiment of the present invention, such as Figure 11 institute Show, comprising the following steps:

Step S500, terminal UE have been set up PDN connection in a 4 g system, may also set up dedicated hold It carries；

Step S501, source 4G RAN node (eNB) discovery need to be switched to 5G, switching request are sent to MME, wherein carrying Target cell information；

Step S502, MME send Forward Relocation to AMF according to switching request, selection target AMF Request, wherein 4G session information, including PGW-C/SMF are carried, the address S-GW, carrying information etc.；

Step S503, AMF select a SMF-F, PDU Session Request are initiated to it, wherein carrying 4G meeting Talk about information.The SMF-F can be the specific SMF in visited place, or close the SMF set with S-GW.

Step S504, SMF-F establish N4 session to UPF-F, obtain N3 uplink tunnel information.SMF-F returns to PDU to AMF Session Response, wherein carrying corresponding 5G PDU session information and the uplink tunnel information of N3.The letter Breath is the 5G session information that SMF-F is generated using the mapping of 4G session information, or the 5G session information obtained using Figure 13；

Step S505:AMF sends Handover Request and requests to give 5G RAN node, and wherein 5G PDU session believes Breath and N3 uplink tunnel information.

Step S506:5G RAN node sends Handover Request Acknowledge to AMF, wherein containing N3 Downlink tunnel information；

Step S507, AMF send PDU Session modify Request to SMF-F, and request establishes and down forwards tunnel Road；

Step S508, SMF-F contain forwarding tunnel information to AMF returning response；

Step S509:AMF sends Forward Relocation Response to MME, wherein containing Serving GW The information such as change indication, EPS Bearer Setup List, TEIDs；

Step S510:MME sends Create Indirect Data Forwarding Tunnel Request to S-GW, Interim forwarding tunnel is established in request.

Step S511:MME send Handover Command to 4G RAN node wherein contain interim forwarding tunnel and Carry information

Step S512:4G RAN (eNB) sends Handover Command to UE, wherein containing the nothing of target 5G RAN Line information；

Step S513:UE accesses target 5G RAN node according to the 5G RAN wireless messages received, sends Handover Confirm gives 5G RAN node.

At this point, by forwarding tunnel through S-GW, UPF-F, 5G RAN node arrives after downlink data reaches 4G RAN node Up to UE；

After step s 508, after UE is switched to 5G system, upstream data can reach UPF-F, and step S514~ The purpose of S519 is exactly to establish the medium surface channel of UPF-F to PGW-U/UPF.Step S514 can be with step S507 same In message, step S515 can both be sent after step S508.Step S514 is also possible to an independent message, in step S509 After send.Furthermore the present embodiment can also receive step by the way of b in Figure 13 using the mode of a in Figure 13 After the Handover notify of S520, the foundation of medium surface is triggered.It is repeated no more using the embodiment of b mode in Figure 13.

Step S514:AMF sends PDU session handover request to SMF-F

Step S515:SMF-F and UPF-F interaction, obtain N9 downlink tunnel information, then send PDU to SMF/PGW-C Session handover request, wherein carrying N9 downlink tunnel information.

Step S516: if deploying PCC, SMF can initiate PDU-CAN Session to PCF/PCRF Modification, to obtain the 5GS PCC rule of the PDU session after being switched to 5G.

Step S517:SMF/PGW-C initiates N4session modification to UPF/PGW-U, notifies its N9 downlink Tunnel information, and obtain N9 uplink tunnel information；

Step S518:SMF/PGW-C sends PDU Session Handover Response to SMF-F, wherein carrying N9 uplink tunnel information；

N9 uplink tunnel information is notified UPF-F by step S519:SMF-F, sends PDU Session Handover to AMF Response；

Step S520:5G RAN node sends Handover Notify to AMF

Step S521:AMF sends Forward Relocation Complete Notification message to MME, really Recognize switching to complete.

Step S522:AMF sends Handover Complete message to SMF/PGW-C by SMF-F.

Downlink data is sent to target side to step S523:SMF/PGW-C notice UPF/PGW-U. by UPF/PGW-U at this time.

Step S524:SMF/PGW-C sends Handover Complete Ack to AMF.

Step S503 needs to send PDU session to the SMF-F selected for each PDN connection handover request；These SMF-F may be the same entity

Step S504, after needing to receive all responses, step of initiating S505；

Step S507, needs for each PDN connection, sends Modify PDU session to SMF-F request；

Step S508, after needing to receive all responses, to MME sending step S509 message；

Step S514, needs for each PDN connection, to initiating PDU Session Handover Request.

Step S522 needs to send Handover Complete message to each SMF/PGW-C.

Preferred embodiment two

Figure 12 is the implementation flow chart according to the preferred embodiment of the invention that UPF relocation occurs, such as Figure 12 institute Show.

Step S600, terminal UE have been set up PDN connection in a 4 g system, may also set up dedicated hold It carries；

Step S601, source 4G RAN node (eNB) discovery need to be switched to 5G, switching request are sent to MME, wherein carrying Target cell information；

Step S602, MME send Forward Relocation to AMF according to switching request, selection target AMF Request, wherein 4G session information, including PGW-C/SMF are carried, the address S-GW, carrying information etc.；

Step S603, AMF select a SMF-F, PDU Session Request are initiated to it, wherein carrying 4G meeting Talk about information.The SMF-F can be the specific SMF in visited place, or close the SMF set with S-GW.

Step S604, SMF-F establish N4 session to UPF-F, obtain N3 uplink tunnel information.SMF-F returns to PDU to AMF Session Response, wherein carrying corresponding 5G PDU session information and the uplink tunnel information of N3.The letter Breath is the 5G session information that SMF-F is generated using the mapping of 4G session information, or the 5G session information obtained using Figure 13；

Step S605:AMF sends Handover Request and requests to give 5G RAN node, and wherein 5G PDU session believes Breath and N3 uplink tunnel information.

Step S606:5G RAN node sends Handover Request Acknowledge to AMF, wherein containing N3 Downlink tunnel information；

Step S607, AMF send PDU Session modify Request to SMF-F, and request establishes and down forwards tunnel Road；

Step S608, SMF-F contain forwarding tunnel information to AMF returning response；

Step S609:AMF sends Forward Relocation Response to MME, wherein containing Serving GW The information such as change indication, EPS Bearer Setup List, TEIDs；

Step S610:MME sends Create Indirect Data Forwarding Tunnel Request to S-GW, Interim forwarding tunnel is established in request.

Step S611:MME send Handover Command to 4G RAN node wherein contain interim forwarding tunnel and Carry information

Step S612:4G RAN (eNB) sends Handover Command to UE, wherein containing the nothing of target 5G RAN Line information；

Step S613:UE accesses target 5G RAN node according to the 5G RAN wireless messages received, sends Handover Confirm gives 5G RAN node.

SMF-F only realizes interim downlink data forwarding, and the purpose of step S614~S619 and S621 are exactly to establish The medium surface channel of 5G RAN, UPF-F to PGW-U/UPF.Step S614 can be sent after step S609.The present embodiment uses Be a in Figure 13 mode, furthermore can also be by the way of b in Figure 13, in the Handover notify for receiving step S620 Afterwards, the foundation of medium surface is triggered, step S621 is sent after step S625 at this time.Using b mode in Figure 13 embodiment no longer It repeats.

Step S614:AMF selects t-SMF, PDU session handover request is sent to t-SMF, wherein taking With N3 downlink tunnel information；

Step S615:t-SMF and t-UPF interaction, obtain N3 uplink tunnel information, N9 downlink tunnel information, then to SMF/PGW-C sends PDU session handover request, wherein carrying N9 downlink tunnel information.

Step S616: if deploying PCC, SMF can initiate PDU-CAN Session to PCF/PCRF Modification, to obtain the 5GS PCC rule of the PDU session after being switched to 5G.

Step S617:SMF/PGW-C initiates N4session modification to UPF/PGW-U, notifies its N9 downlink Tunnel information, and obtain N9 uplink tunnel information；

Step S618:SMF/PGW-C sends PDU Session Handover Response to t-SMF, wherein carrying N9 uplink tunnel information；

N9 uplink tunnel information is notified t-UPF by step S619:t-SMF, sends PDU Session Handover to AMF Response, wherein carrying N3 uplink tunnel information；

Step S620:5G RAN node sends Handover Notify to AMF

Step S621:AMF notifies N3 uplink tunnel information to 5G RAN node；

Step S622:AMF sends Forward Relocation Complete Notification message to MME, really Recognize switching to complete.

Step S623:AMF sends Handover Complete message to SMF/PGW-C by t-SMF.

Downlink data is sent to t-UPF to step S624:SMF/PGW-C notice UPF/PGW-U. by UPF/PGW-U at this time.

Step S625:SMF/PGW-C sends Handover Complete Ack to AMF.

Subsequent step further includes UE in 5G network initiation register flow path, and MME discharges 4G Internet resources, and AMF discharges SMF- F。

Step S603 needs to send PDU session to the SMF-F selected for each PDN connection handover request；These SMF-F may be the same entity

Step S604, after needing to receive all responses, step of initiating S605；

Step S607, needs for each PDN connection, sends Modify PDU session to SMF-F request；

Step S608, after needing to receive all responses, to MME sending step S609 message；

Step S614, needs for each PDN connection, to initiating PDU Session Handover Request.

Step S621:AMF will notify the corresponding N3 tunneled upstream information of all PDU session of 5G RAN node；

Step S623 needs to send Handover Complete message to each SMF/PGW-C.

Preferred embodiment three

Figure 13 is the embodiment schematic diagram for establishing target side medium surface of the preferred embodiment of the present invention, as shown in figure 13；

Mode a is exactly the embodiment of Figure 11 and Figure 12.Before switching is completed, the medium surface channel of target side is complete Complete to establish, specific steps correspond to step referring to Figure 11 and Figure 12 here；

Mode b, after receiving the Handover notify of 5G RAN node, just medium surface channel is established in triggering.Step It is the same before step S520, S620 in process and Figure 11 and 12 before S720, there is no step S514~S519 only, and S614-S619。

Step S721:5G RAN node sends Handover Notify to AMF；

Step S722:AMF selects t-SMF, PDU session handover request is sent to t-SMF, wherein taking With N3 downlink tunnel information；

Step S723:t-SMF and t-UPF interaction, obtain N3 uplink tunnel information, N9 downlink tunnel information, then to SMF/PGW-C sends PDU session handover request, wherein carrying N9 downlink tunnel information.

Step S724: if deploying PCC, SMF can initiate PDU-CAN Session to PCF/PCRF Modification, to obtain the 5GS PCC rule of the PDU session after being switched to 5G.

Step S725:SMF/PGW-C initiates N4session modification to UPF/PGW-U, notifies its N9 downlink Tunnel information, and obtain N9 uplink tunnel information；Downstream media is sent to t-UPF at this time；

Step S726:SMF/PGW-C sends PDU Session Handover Response to t-SMF, wherein carrying N9 uplink tunnel information；

N9 uplink tunnel information is notified t-UPF by step S727:t-SMF, sends PDU Session Handover to AMF Response, wherein carrying N3 uplink tunnel information；

Step S728:AMF notifies N3 uplink tunnel information to 5G RAN node；

After SMF-F receives switching request, according to the session information of 4G, the session information in 5G system is locally derived.Or Person's dynamic is obtained from SMF/PGW-C.

Preferred embodiment four

Figure 14 is the implementation flow chart that vSMF dynamic according to the present invention in preferred embodiment obtains 5G session information.Its In, S-GW and vSMF are that a conjunction sets network element.During 4G system establishes PDN connection, establish during special feature, SMF/PGW-C is sent to vSMF by corresponding 5G system session information, by the interface between SMF and vSMF.AMF receives switching After request, vSMF identical with the address S-GW is selected to send switching request；Or

Step S800, terminal UE have been set up PDN connection in a 4 g system；

5G session information is sent to the Vsmf of selection by step S801, SMF/PGW-C；

The foundation of dedicated bearer occurs in a 4 g system for step S802, terminal UE, and process is deleted in modification；

5G session information is sent to the vSMF of selection by step S803, SMF/PGW-C；

Step S804, S-GW change；

5G session information is sent to target vSMF by step S805, SMF/PGW-C, or

5G session information is sent to target vSMF by step S805a, source vSMF；

Here, vSMF and S-GW can be conjunction and set network element, it is also possible to some specific vSMF.When for certain specific vSMF When, without step S805 and S805a.

In a preferred embodiment of the invention, 4G session information locally can be mapped as 5G session information by SMF-F, but such as Mistake occurs for fruit mapping, and after the completion of switching, SMF/SMF/PGW-C initiates Qos stream modification process to correct.

Preferred embodiment five

Figure 15 is the process of SMF/PGW-C initiation Qos stream modification after the completion of switching according to the preferred embodiment of the invention Figure before step S914 as corresponding functional steps, is distinguished as follows by taking above-mentioned Figure 14 as an example:

Step S906, SMF/PGW-C have found 5G session information mistake；

Step S915: after the completion of switching, SMF/SMF/PGW-C initiates Qos to t-SMF/t-UPF and flows modification； T-SMF and t-UPF interaction, completes modification.T-SMF sends Qos to AMF and flows modification；

Step S916:AMF initiates session modification to 5G RAN；

Step S917:5G RAN may initiate reconfiguring for RRC；

Step S918:5G RAN node sends to AMF and responds；

Step S919:AMF sends the response of session modification to SMF/PGW-C.

Preferred embodiment six

Figure 16 is acquisition 5G session information according to the preferred embodiment of the invention, the implementation flow chart of reallocation forwarding surface, As shown in figure 16, comprising:

Step S1600, terminal UE have been set up PDN connection in a 4 g system, may also set up dedicated hold It carries；

Step S1601, source 4G RAN node (eNB) discovery need to be switched to 5G, switching request are sent to MME, wherein taking With target cell information；

Step S1602, MME send Forward Relocation to AMF according to switching request, selection target AMF Request, wherein 4G session information, including PGW-C/SMF are carried, the address S-GW, carrying information etc.；

Step S1603, AMF select a SMF-T, PDU Session Request are initiated to it, wherein carrying 4G meeting Talk about information.The SMF-T can be the specific SMF in visited place, or close the SMF set with S-GW.

Step S1604, SMF-T establish N4 session to UPF-T, obtain N3 uplink tunnel information.SMF-F returns to PDU to AMF Session Response, wherein carrying corresponding 5G PDU session information and the uplink tunnel information of N3.The letter Breath is the 5G session information that SMF-T is generated using the mapping of 4G session information, or the 5G session information obtained using Figure 14；

Step S1605:AMF sends Handover Request and requests to give 5G RAN node, wherein 5G PDU session Information and N3 uplink tunnel information.

Step S1606:5G RAN node sends Handover Request Acknowledge to AMF, wherein containing N3 downlink tunnel information；

Step S1607, AMF establish interim forwarding tunnel.AMF selects a forwarding SMF-F, sends PDU Session Forward tunnel Request, request establish and down forward tunnel；

Step S1608, SMF-F control UPF-F, and generation down forwards information, to AMF returning response, contains forwarding tunnel Road information；

Step S1609:AMF sends Forward Relocation Response to MME, wherein containing Serving The information such as GW change indication, EPS Bearer Setup List, TEIDs；

Step S1610:MME sends Create Indirect Data Forwarding Tunnel to S-GW Interim forwarding tunnel is established in Request, request.

Step S1611:MME sends Handover Command and wherein contains interim forwarding tunnel to 4G RAN node With carrying information；

Step S1612:4G RAN (eNB) sends Handover Command to UE, wherein containing target 5G RAN's Wireless messages；

Step S1613:UE accesses target 5G RAN node according to the 5G RAN wireless messages received, sends Handover Confirm gives 5G RAN node.

SMF-F only realizes interim downlink data forwarding, and the purpose of step S1614~S1619 is exactly to establish 5G RAN, The medium surface channel of UPF-t to PGW-U/UPF.Step S1614 can be sent after step S1609.The present embodiment using The mode of a in Figure 13, furthermore can also by the way of b in Figure 13, after receiving the Handover notify of step S1620, Complete the foundation in the medium surface channel of UPF-t to PGW-U/UPF.It is repeated no more using the embodiment of b mode in Figure 13.

Step S1614:AMF sends PDU session modify request to t-SMF；

Step S1615:t-SMF and t-UPF interaction, obtain N9 downlink tunnel information, then send PDU to SMF/PGW-C Session request, wherein carrying N9 downlink tunnel information.

Step S1616: if deploying PCC, SMF can initiate PDU-CAN Session to PCF/PCRF Modification, to obtain the 5GS PCC rule of the PDU session after being switched to 5G.

Step S1617:SMF/PGW-C initiates N4session modification to UPF/PGW-U, notifies its N9 downlink Tunnel information, and obtain N9 uplink tunnel information；

Step S1618:SMF/PGW-C sends PDU Session Response to t-SMF, wherein carrying N9 uplink tunnel Road information；

N9 uplink tunnel information is notified t-UPF by step S1619:t-SMF, sends PDU Session to AMF Handover Response；

Step S1620:5G RAN node sends Handover Notify to AMF；

Step S1621:AMF sends Forward Relocation Complete Notification message to MME, really Recognize switching to complete.

Step S1622:AMF sends Handover Complete message to SMF/PGW-C by t-SMF.

Downlink data is sent to t-UPF to step S1623:SMF/PGW-C notice UPF/PGW-U. by UPF/PGW-U at this time.

Step S1624:SMF/PGW-C sends Handover Complete Ack to AMF.

Step S1603 needs to send PDU session to the SMF-T selected for each PDN connection request；These SMF-T may be the same entity

Step S1604, after needing to receive all responses, step of initiating S1605；

Step S1607, needs for each PDN connection, sends PDU session forward to SMF-F tunnel request；

Step S1608, after needing to receive all responses, to MME sending step S1609 message；

Step S1614, needs for each PDN connection, to initiating PDU Session modify Request.

Step S1622 needs to send Handover Complete message to each SMF/PGW-C.

Embodiment 4

The embodiments of the present invention also provide a kind of storage medium, which includes the program of storage, wherein above-mentioned Program executes method described in any of the above embodiments when running.

Optionally, in the present embodiment, above-mentioned storage medium can be set to store the journey for executing following steps Sequence code:

S1, authentication management function AMF entity receive 4G network system and reset request to the forwarding of 5G network system, wherein The forwarding resetting request includes: 4G session information；

S2, the AMF select conversation management functional SMF, and send Packet Data Unit PDU session to the SMF of selection and ask It asks, wherein the PDU session request includes: the 4G session information, and the PDU session request is used to indicate the SMF to institute It states AMF and returns to the corresponding 5G session information of the 4G session information.

Optionally, storage medium is also configured to store the program code for executing following steps:

S3, the AMF receive the SMF that SMF is returned and handle the 5G session information that the 4G session information obtains； And/or

S4, after the switching confirmation message that the base station of the 5G network system receives that the terminal is sent, described in reception Base station and the user plane functions reality of the 5G network system are established in the switching notice that the base station of 5G network system is sent, request The channel of body, wherein the user plane functions refer to that the conjunction of user plane functions entity UPF and PGW-U set function, or, SMF with PGW-C closes the user plane functions entity for setting function control；And/or

Before the switching confirmation message that the base station of the 5G network system receives that the terminal is sent, the AMF, also For after receiving the 5G session information, request establish the base station of the 5G network system with the user plane functions entity Channel, wherein refer to that the conjunction of user plane functions entity UPF and PGW-U set function, or, SMF and PGW-C conjunction set function control User plane functions entity

Optionally, in the present embodiment, above-mentioned storage medium can include but is not limited to: USB flash disk, read-only memory (Read- Only Memory, referred to as ROM), it is random access memory (Random Access Memory, referred to as RAM), mobile hard The various media that can store program code such as disk, magnetic or disk.

Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.It is all within principle of the invention, it is made it is any modification, etc. With replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of switching handling method of network system characterized by comprising

Authentication management function AMF entity receives the forwarding resetting request that 4G network system is sent to 5G network system, wherein described Forwarding resetting request includes: 4G session information；

The AMF selects conversation management functional SMF, and sends Packet Data Unit PDU session request to the SMF of selection, wherein The PDU session request includes: the 4G session information, and the PDU session request is used to indicate the SMF and returns to the AMF Return the corresponding 5G session information of the 4G session information.

2. the method according to claim 1, wherein the AMF sends Packet Data Unit to the SMF of selection After PDU session request, the method also includes:

The AMF receives the SMF that SMF is returned and handles the 5G session information that the 4G session information obtains；And/or

The AMF notifies the 4G network system to switch to resource needed for the reserved switching in the base station of the 5G network system Required resource has reserved success.

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

After the switching confirmation message that the base station of the 5G network system receives that the terminal is sent, described in the AMF reception Base station and the user plane functions reality of the 5G network system are established in the switching notice that the base station of 5G network system is sent, request The channel of body, wherein the user plane functions entity refers to that the conjunction of user plane functions entity UPF and PGW-U set function, or, SMF The user plane functions entity for setting function control is closed with PGW-C；And/or

Before the switching confirmation message that the base station of the 5G network system receives that the terminal is sent, the AMF is being received After the 5G session information, the base station of the 5G network system and the channel of the user plane functions entity are established in request, wherein The user plane functions entity refers to that the conjunction of user plane functions entity UPF and PGW-U set function, or, SMF and PGW-C conjunction sets function The user plane functions entity that can control.

4. the method according to claim 1, wherein the SMF includes: the first SMF, the 2nd SMF, the 3rd SMF, The AMF receives the SMF that SMF is returned and handles the 5G session that the 4G session information obtains at least through following manner Information:

The 5G session information is sent to the first SMF by the 2nd SMF, wherein the first SMF receive it is described After the session request that AMF is sent, the 5G session information is fed back to the AMF.

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

The 5G session information is sent to the first SMF by the 3rd SMF, wherein the first SMF is receiving the AMF After the session request of transmission, the 5G session information is fed back to the AMF, in the first SMF and the 4G network system S-GW is to close to set network element.

6. a kind of switching handling method of network system characterized by comprising

The 5G session information that the 2nd SMF is sent is received, it is anti-to the AMF after receiving the session request that the AMF is sent Present the 5G session information.

7. a kind of switch processing device of network system is applied in authentication management function AMF entity characterized by comprising

First receiving module resets request to the forwarding of 5G network system for receiving 4G network system, wherein the forwarding weight Setting request includes: 4G session information；

Selecting module for selecting conversation management functional SMF, and sends Packet Data Unit PDU session to the SMF of selection and asks It asks, wherein the PDU session request includes: the 4G session information, and the PDU session request is used to indicate the SMF to institute It states AMF and returns to the corresponding 5G session information of the 4G session information.

8. device according to claim 7, which is characterized in that described device further include:

Second receiving module, the SMF for being also used to receive SMF return handle the 5G session that the 4G session information obtains Information；And/or

9. a kind of switch processing device of network system is applied to conversation management functional SMF characterized by comprising

Third receiving module, for receiving the PDU session request of authentication management function AMF transmission, wherein the PDU session is asked Asking includes: the 4G session information；

10. a kind of switching processing system of network system characterized by comprising

Authentication management function AMF entity resets request to the forwarding of 5G network system for receiving 4G network system, selects session Management function SMF, and Packet Data Unit PDU session request is sent to the SMF of selection, wherein the forwarding resets request packet Include: 4G session information, the PDU session request include: the 4G session information；

11. system according to claim 10, which is characterized in that the AMF is also used to receive the SMF of SMF return Handle the 5G session information that the 4G session information obtains；And/or it is also used to reserved to the base station of the 5G network system Resource needed for switching, and the resource for notifying the 4G network system switching required has reserved success.

12. system according to claim 10, which is characterized in that receive the end in the base station of the 5G network system After holding the switching confirmation message sent,

The AMF, is also used to receive the switching notice that the base station of the 5G network system is sent, and 5G network system is established in request The channel of the base station of system and the user plane functions entity, wherein the user plane functions entity refers to user plane functions entity The conjunction of UPF and PGW-U sets function, or, SMF and PGW-C closes the user plane functions entity for setting function control；And/or

Before the switching confirmation message that the base station of the 5G network system receives that the terminal is sent, the AMF is also used to After receiving the 5G session information, request establish the base station of the 5G network system with it is logical with the user plane functions entity Road, wherein the user plane functions entity refers to that the conjunction of user plane functions entity UPF and PGW-U set function, or, SMF and PGW- C closes the user plane functions entity for setting function control.

13. system according to claim 10, which is characterized in that the SMF includes: the first SMF, the 2nd SMF, third SMF,

2nd SMF is also used to the 5G session information being sent to the first SMF, wherein the first SMF is connecing After receiving the switching request that the AMF is sent, the 5G session information is fed back to the AMF.

14. system according to claim 13, which is characterized in that the 3rd SMF is also used to the 5G session information It is sent to the first SMF, wherein the first SMF is anti-to the AMF after receiving the session request that the AMF is sent The 5G session information is presented, the S-GW in the first SMF and the 4G network system is to close to set network element.

15. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein when described program is run The switching handling method of network system described in any one of perform claim requirement 1 to 5 or network system as claimed in claim 6 The switching handling method of system.

16. a kind of processor, which is characterized in that the processor is for running program, wherein right of execution when described program is run Benefit require any one of 1 to 5 described in the switching handling method of network system or cutting for network system as claimed in claim 6 Change processing method.