CN109413702A

CN109413702A - A kind of method for switching network, device and core net

Info

Publication number: CN109413702A
Application number: CN201710703169.7A
Authority: CN
Inventors: 苑红; 周欣; 李爱华
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Priority date: 2017-08-16
Filing date: 2017-08-16
Publication date: 2019-03-01

Abstract

The present invention provides a kind of method for switching network, device and core nets, are related to mobile communication technology field；This method is applied to the first core net, this method comprises: obtaining the first network element ID information of the first core net belonging to user equipment (UE)；According to the corresponding relationship of the network element ID information of the first core net and the network element ID information of the second core net, the second network element ID information corresponding with the first network element ID information is determined；According to the second network element ID information, indicate that UE switches to the second core net；Wherein, the first core net is different from the network type of the second core net.The present invention solves the slice for only supporting 4G and 5G network internal in the prior art or DCN selection, not aiming at the problem that solution for the scene that interoperates.

Description

A kind of method for switching network, device and core net

Technical field

The present invention relates to mobile communication technology field, in particular to a kind of method for switching network, device and core net.

Background technique

In existing net, the network that operator may be relatively independent for different types of service deployment is such as based on cellular network Narrowband Internet of Things (NB-IoT) be also beneficial to maintenance and management to plan NE quantity as needed.In existing 4G network In, operator is different types of use by disposing multiple dedicated core networks (Dedicated Core Networks, DCN) Family equipment (User Equipment, UE) or business provide network function service.

The concept of network slice (Network Slice, NS) is proposed in 5G system, for providing certain type of net Network ability and characteristic.One Network Slice includes the network function of control plane and user face simultaneously.UE, wireless and network Can according to network be sliced selection auxiliary information (Network Slice Selection Assistance information, NSSAI) and single network slice selection auxiliary information (Single NSSAI, S-NSSAI) selects the net in Network Slice Network function, wherein NSSAI is made of multiple S-NSSAI.

The dual-mode terminal that 4G and 5G is supported while existing, there is the scene of interoperability in 4G and 5G combination network, however, The prior art only supports slice or the DCN selection of 4G and 5G network internal at present, not for the solution party of interoperability scene Case, accordingly, it is difficult to carry out the mutual switching of 4G and 5G.

Summary of the invention

The present invention provides a kind of method for switching network, device and core nets, and its purpose is to solve in the prior art Slice or the DCN selection for only supporting 4G and 5G network internal, not aiming at the problem that solution for the scene that interoperates.

On the one hand, the embodiment provides a kind of method for switching network, this method is applied to the first core net, should Method includes:

Obtain the first network element ID information of the first core net belonging to user equipment (UE)；

According to the corresponding relationship of the network element ID information of the first core net and the network element ID information of the second core net, determine The second network element ID information corresponding with the first network element ID information；

According to the second network element ID information, indicate that UE switches to the second core net；Wherein, the first core net and the second core The network type of net is different.

Preferably, the step of obtaining the first network element ID information of the first core net belonging to user equipment (UE), comprising:

Obtain the first network element ID information of UE affiliated first network element in the first core net；

Acquisition UE is in the first core net the step of the first network element ID information of affiliated first network element, comprising:

Obtain the international mobile subscriber identity IMSI of UE；

According to IMSI, first single network slice selection auxiliary information S-NSSAI, first S- corresponding with IMSI are inquired NSSAI is the first network element ID information of UE affiliated first network element in the first core net.

Preferably, it is closed according to the network element ID information of the first core net is corresponding with the network element ID information of the second core net The step of system, determining the second network element ID information corresponding with the first network element ID information, comprising:

According to the first corresponding relationship of the network element ID information of the first core net and the network element ID information of the second core net, Determine the second network element ID information corresponding with the first network element ID information；

According to the first corresponding relationship of the network element ID information of the first core net and the network element ID information of the second core net, The step of determining the second network element ID information corresponding with the first network element ID information, comprising:

According to the first corresponding relationship of the network element ID information of the first core net and the network element ID information of the second core net, Determine that first dedicated core network identifier DCN-ID corresponding with the first S-NSSAI, the first DCN-ID are and the first network element ID The corresponding second network element ID information of information.

Preferably, according to the second network element ID information, the step of UE switches to the second core net is indicated, comprising:

According to the second network element ID information, indicate UE by network switching to the second net corresponding with the second network element ID information Member.

Preferably, the step of obtaining the international mobile subscriber identity IMSI of UE, comprising:

When receiving the context request of the international mobile subscriber identity IMSI for carrying UE of the second core net transmission, The IMSI of UE is obtained from context request.

Preferably, according to the second network element ID information, indicate that UE is extremely corresponding with the second network element ID information by network switching The second network element the step of, comprising:

First DCN-ID is encapsulated in the context response for context request and is sent to the second core net；

Indicate that the second core net according to the first DCN-ID, determines the second network element corresponding with the first DCN-ID, instruction UE will Network switching is to the second network element.

Receive the IMSI for carrying UE of the Next-Generation networking NG-RAN from the first core net first cuts When changing request, the IMSI of UE is obtained from the first switching request.

According to the first DCN-ID, the second network element corresponding with the first DCN-ID is determined；

Re-positioning request is sent to the second network element；

Indicate that the second network element according to re-positioning request, notifies UE by network switching to the second network element.

Obtain the 2nd DCN-ID of the first network element ID information of user equipment (UE) affiliated network element in the first core net；

Obtain the step of user equipment (UE) the 2nd DCN-ID of the first network element ID information of affiliated network element in the first core net Suddenly, comprising:

Receive the first network element ID information second for carrying UE affiliated network element in the first core net from NG-RAN When DCN-ID registration request, the 2nd DCN-ID is obtained from registration request；

Or

The the first network element ID information second for carrying UE affiliated network element in the first core net is sent to the second core net The forwarding re-positioning request of DCN-ID, the second core net of instruction obtain the 2nd DCN-ID of UE from forwarding re-positioning request.

According to the second corresponding relationship of the network element ID information of the first core net and the network element ID information of the second core net, Determine the second network element ID information corresponding with the first network element ID information；

According to the second corresponding relationship of the network element ID information of the second core net and the network element ID information of the first core net, The step of determining the second network element ID information corresponding with the first network element ID information, comprising:

According to the second corresponding relationship of the network element ID information of the first core net and the network element ID information of the second core net, Determine that twoth S-NSSAI corresponding with the 2nd DCN-ID, the 2nd S-NSSAI are the second net corresponding with the first network element ID information First identification information.

Preferably, this method further include:

The carrying UE of evolution land radio access web E-UTRAN transmission of Universal Mobile Communication System is received in the first core When the switching request of the 2nd DCN-ID of the first network element ID information of the first network element belonging in heart net, the in switching request is obtained Two DCN-ID；

2nd DCN-ID is encapsulated in re-positioning request, re-positioning request is sent to the second core net.

Preferably, corresponding relationship is stored in network slice selection function NSSF module.

On the other hand, the embodiments of the present invention also provide a kind of method for switching network, are applied to the second core net, the party Method includes:

Obtain the second network element ID information corresponding with the first network element ID information of the first core net；Second network element ID Information is determined according to the corresponding relationship of the identification information of the network element ID information and the second core net of the first core net；

According to the second network element ID information, by the second core net of user equipment UE access；Wherein, the first core net and second The network type of core net is different.

Preferably, the step of obtaining the second network element ID information corresponding with the first network element ID information of the first core net Before, comprising:

When receiving the TAU request of the international mobile subscriber identity IMSI for carrying UE of UE transmission, TAU request is obtained The IMSI of middle carrying；

IMSI is encapsulated in context request, context request is sent to the first core net.

Preferably, the step of the second network element ID information corresponding with the first network element ID information of the first core net is obtained Suddenly, comprising:

Receive the context response for context request of the first core net transmission；

The the first dedicated core network identifier DCN-ID carried in context response is obtained, the first DCN-ID is and the first net The corresponding second network element ID information of first identification information.

Preferably, according to the second network element ID information, the step of by user equipment the second core net of UE access, comprising:

According to the first DCN-ID, the second network element of the second core net corresponding with the first DCN-ID is determined, will include second The instruction information of network element is sent to UE.

Preferably, this method further include:

Receive the re-positioning request of the first core net transmission；

According to re-positioning request, indicate the network switching of UE to the second core net.

Preferably, the step of obtaining the second network element ID information corresponding with the first network element ID information of the first core net Before, further includes:

When receiving the forwarding re-positioning request of the first core net transmission, by the network switching of UE to the second core net.

On the other hand, the embodiments of the present invention also provide a kind of network switching devices, are applied to the first core net, the dress It sets and includes:

Data obtaining module, for obtaining the first network element ID information of the first core net belonging to user equipment (UE)；

Information determination module, for being believed according to the network element ID information of the first core net and the network element ID of the second core net The corresponding relationship of breath determines the second network element ID information corresponding with the first network element ID information；

Switch indicating module, for indicating that UE switches to the second core net according to the second network element ID information；Wherein, One core net is different from the network type of the second core net.

Preferably, data obtaining module includes:

First acquisition submodule, for obtaining the first network element ID letter of UE affiliated first network element in the first core net Breath；

First acquisition submodule is used for:

Obtain the international mobile subscriber identity IMSI of UE；

Preferably, information determination module includes:

First determines submodule, for according to the network element ID information of the first core net and the network element ID of the second core net First corresponding relationship of information determines the second network element ID information corresponding with the first network element ID information；

First determines that submodule is used for:

Preferably, switching indicating module includes:

First instruction submodule, for according to the second network element ID information, indicate UE by network switching to the second network element Corresponding second network element of identification information.

Preferably, the first acquisition submodule includes:

First IMSI acquiring unit, for receiving the international mobile subscriber identification for carrying UE of the second core net transmission When the context request of code IMSI, the IMSI of UE is obtained from context request.

Preferably, the first instruction submodule includes:

First indicating unit is sent to for being encapsulated in the first DCN-ID in the context response for context request Second core net；

Preferably, the first acquisition submodule includes:

2nd IMSI acquiring unit, for receiving taking for the Next-Generation networking NG-RAN from the first core net When the first switching request of the IMSI with UE, the IMSI of UE is obtained from the first switching request.

Preferably, switching indicating module includes:

Second instruction submodule, for determining the second network element corresponding with the first DCN-ID according to the first DCN-ID；

Re-positioning request is sent to the second network element；

Preferably, data obtaining module includes:

Third acquisition submodule, for obtaining the first network element ID of user equipment (UE) affiliated network element in the first core net The 2nd DCN-ID of information；

Third acquisition submodule is used for:

Or

Preferably, information determination module includes:

Second determines submodule, for according to the network element ID information of the first core net and the network element ID of the second core net Second corresponding relationship of information determines the second network element ID information corresponding with the first network element ID information；

Second determines submodule, is used for:

Preferably, the device further include:

Forwarding module is requested, the evolution land radio access web E-UTRAN for receiving Universal Mobile Communication System is sent out The carrying UE sent in the first core net belonging to the first network element the 2nd DCN-ID of the first network element ID information switching request when, Obtain the 2nd DCN-ID in switching request；

On the other hand, the embodiments of the present invention also provide a kind of network switching devices, are applied to the second core net, device Include:

Identifier acquisition module, for obtaining the second network element ID corresponding with the first network element ID information of the first core net Information；Second network element ID information is pair according to the identification information of the network element ID information and the second core net of the first core net It should be related to determining；

Network access module is used for according to the second network element ID information, by the second core net of user equipment UE access；Its In, the first core net is different from the network type of the second core net.

Preferably, identifier acquisition module includes:

IMSI acquisition submodule, for receiving the international mobile subscriber identity IMSI that carries UE of UE transmission When TAU is requested, the IMSI carried in TAU request is obtained；

Preferably, identifier acquisition module includes:

DCN-ID acquisition submodule, for receiving the context response for context request of the first core net transmission；

Preferably, network access module includes:

Information sending submodule, for determining the second core net corresponding with the first DCN-ID according to the first DCN-ID Instruction information comprising the second network element is sent to UE by the second network element.

Preferably, the device further include:

Network handover module, for receiving the re-positioning request of the first core net transmission；

Preferably, the device further include:

Request receiving module cuts the network of UE when for receiving the forwarding re-positioning request of the first core net transmission Shift to the second core net.

Another aspect the embodiments of the present invention also provide a kind of core net, including memory, processor and is stored in On reservoir and the computer program that can run on a processor, processor realize above-mentioned network switching side when executing computer program Step in method.

In another aspect, being stored thereon with calculating the embodiments of the present invention also provide a kind of computer readable storage medium Machine program, the program realize the step in above-mentioned method for switching network when being executed by processor.

Above scheme of the invention is include at least the following beneficial effects:

Method for switching network, device and core net provided by the invention are believed by the network element ID of preset first core net The corresponding relationship of breath and the network element ID information of the second core net, when the handover operation between progress 4G network and 5G network When, the second network element ID information corresponding with the first network element ID information can be searched according to corresponding relationship, and indicate that UE is switched to The second network element corresponding with the second network element ID information completes the handover operation between 4G network and 5G network, avoids switching Occurs situations such as handover failure or switching overtime in the process.The present invention solves only supports 4G and 5G network internal in the prior art Slice or DCN selection, not for interoperability scene solution aiming at the problem that.

Detailed description of the invention

Fig. 1 shows the basic step flow charts for the method for switching network that one embodiment of the invention provides；

Fig. 2 indicates the basic step flow chart for the method for switching network that further embodiment of this invention provides；

Fig. 3 indicates the first exemplary schematic diagram of a scenario of the invention；

Fig. 4 indicates the second exemplary schematic diagram of a scenario of the invention；

Fig. 5 indicates the basic step flow chart for the method for switching network that further embodiment of this invention provides；

Fig. 6 indicates the exemplary schematic diagram of a scenario of third of the invention；

Fig. 7 indicates the 4th exemplary schematic diagram of a scenario of the invention；

Fig. 8 shows the block diagrams for the network switching device that one embodiment of the invention provides；

Fig. 9 indicates the basic step flow chart for the method for switching network that further embodiment of this invention provides；

Figure 10 indicates the block diagram for the network switching device that further embodiment of this invention provides.

Specific embodiment

To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool Body embodiment is described in detail.In the following description, such as specific configuration is provided and the specific detail of component is only In order to help comprehensive understanding the embodiment of the present invention.It therefore, it will be apparent to those skilled in the art that can be to reality described herein Example is applied to make various changes and modifications without departing from scope and spirit of the present invention.In addition, for clarity and brevity, it is omitted pair The description of known function and construction.

It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment A particular feature, structure, or characteristic is included at least one embodiment of the present invention.Therefore, occur everywhere in the whole instruction " in one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific features, knot Structure or characteristic can combine in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be appreciated that the size of the serial number of following each processes is not meant to execute suitable Sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present invention Process constitutes any restriction.

In addition, the terms " system " and " network " are often used interchangeably herein.

In embodiment provided herein, it should be appreciated that " B corresponding with A " indicates that B is associated with A, can be with according to A Determine B.It is also to be understood that determine that B is not meant to determine B only according to A according to A, it can also be according to A and/or other information Determine B.

Referring to Fig. 1, one embodiment of the invention provides a kind of method for switching network, is applied to the first core net, the party Method includes:

Step 101, the first network element ID information of the first core net belonging to user equipment (UE) is obtained.

Wherein, the first core net is different from the network type of the second core net, that is to say, that when the first core net is 4G net When network, the second core net is 5G network；When the first core net is 5G network, the first core net is 4G network.

First core net is the source network of UE, and the second core net is the target network of UE；Wherein, the network element of 4G network is main For mobility management entity (Mobility Management Entity, MME), the network element of 5G network is mainly mobile management Functional entity (Access and Mobility Management Function, AMF).Network element ID information is used to indicate tool The network element of body.

Step 102, corresponding with the network element ID information of the second core net according to the network element ID information of the first core net Relationship determines the second network element ID information corresponding with the first network element ID information.

In the embodiment of the present invention, it is previously provided with the network element ID information of the first core net and the network element of the second core net The corresponding relationship of identification information, i.e., DCN-ID and the 5G network of 4G network S-NSSAI (or 5G net S-NSSAI and 4G network DCN-ID) corresponding relationship；It, can basis after the first network element ID information of network element of the UE in the first core net determines Above-mentioned corresponding relationship, inquires the second network element ID information of corresponding second core net, and the second network element ID information is corresponding Network element is the target network element of UE.

Optionally, corresponding relationship is stored in network slice selection function NSSF module.

Wherein, corresponding relationship is stored to network and is sliced selection function (Network Slice Selection Function, NSSF) in module, i.e., corresponding relationship is stored in network slice selection function NSSF module, when the first core net When for 4G network, be provided with interface between MME and NSSF module, for MME obtain the network element ID information of the first core net with The corresponding relationship of the network element ID information of second core net.

Step 103, according to the second network element ID information, indicate that UE switches to the second core net.

Wherein, after the second network element ID information determines, corresponding second core is determined according to the second network element ID information The network element of heart net indicates UE by network switching into the network element.

In the embodiment of the present invention, the Nx interface between MME and AMF is also used to transmit the second network element ID information.

In the above embodiment of the present invention, pass through the network element ID information of preset first core net and the net of the second core net The corresponding relationship of first identification information can be looked into when carrying out the handover operation between 4G network and 5G network according to corresponding relationship The second network element ID information corresponding with the first network element ID information is looked for, and indicates that UE is switched to and the second network element ID information pair The second network element answered completes the handover operation between 4G network and 5G network, avoid occurring in handoff procedure handover failure or Situations such as switching overtime.The present invention solves the slice for only supporting 4G and 5G network internal in the prior art or DCN selection, does not have Aiming at the problem that solution for the scene that interoperates.

Referring to fig. 2, another embodiment of the present invention provides a kind of method for switching network, is applied to the first core net, should Method includes:

Step 201, the first network element ID information of UE affiliated first network element in the first core net is obtained.

In the present embodiment, the first core net is 5G network, and the source network of UE, the second core net is 4G network, the target of UE Network；Wherein, the network element of 4G network is mainly MME, and the network element of 5G network is mainly AMF.Network element ID information is used to indicate tool The network element of body.

Wherein, step 201 includes:

Obtain the international mobile subscriber identity IMSI of UE；

In this step, the purpose of obtaining the IMSI of UE is auxiliary in order to inquire the first single network slice selection corresponding with IMSI Supplementary information S-NSSAI, to determine the corresponding slice of S-NSSAI, i.e. target network element.

Step 202, according to the network element ID information of the first core net and the first of the network element ID information of the second core net Corresponding relationship determines the second network element ID information corresponding with the first network element ID information.

Wherein, according to the first corresponding relationship, the second network element ID information corresponding with the first network element ID information is determined.

Specifically, step 202 includes:

Wherein, the first network element ID information i.e. the first S-NSSAI, second the i.e. first dedicated core network mark of network element ID information Knowledge DCN-ID；According to the first corresponding relationship, first DCN-ID corresponding with the first S-NSSAI is inquired, the first DCN-ID is to cut Change the target network element of operation.

Step 203, according to the second network element ID information, indicate that UE is extremely corresponding with the second network element ID information by network switching The second network element.

Wherein, when the second network element ID information determine after, instruction UE by network switching to the second network element ID information Corresponding second network element, the second network element, that is, target network element complete handover operation.

One aspect according to the present embodiment when UE is in idle condition, obtains UE when the network of UE is switched to 4G by 5G International mobile subscriber identity IMSI the step of, comprising:

Specifically, UE has international mobile subscriber identity (International Mobile Subscriber Identification Number, IMSI), when UE is in idle condition, UE sends to the second core net (4G network) and tracks Area update (Tracking Area Update, TAU) request re-starts location register in the second core net with request with more The location information for changing the mobile station (UE) that the second core net is stored, when the MME of 4G network receives TAU request, to first When core net (5G network) sends context request, the IMSI of UE is carried in context request, in this way, when the first core net The IMSI for carrying UE for receiving the transmission of the second core net is carried in context request, can obtain UE's from context request IMSI。

Preferably, step 203 includes:

Wherein, when the first core net obtains the IMSI of UE, and the first S-NSSAI of UE is inquired according to the IMSI of UE, When replying the context request of the second core net, first DCN-ID corresponding with the first S-NSSAI is encapsulated in context response In, and indicate that the second core net determines the second network element corresponding with the first DCN-ID, cut the second core net instruction UE by network Shift to the second network element.

As the first example, referring to Fig. 3, schematic diagram of a scenario shown in Fig. 3 is when the network of UE is switched to 4G by 5G, at UE Scene when idle state, wherein SGW is gateway, and PGW-C+SMF is the user plane gateway of session level, PGW-U+UPF For the control plane gateway of session level；Entity of the AMF as the first core net, entity of the MME as the second core net；Switching flow It mainly comprises the steps that

1.TAU request: UE initiates TAU request to E-URTAN, if this time TAU is 5G to 4G interoperability triggering, UE DCN-ID is not carried in NAS message, and carries IMSI.

2.TAU request: TAU request is sent to the MME of the second core net by E-URTAN.

3. context request: MME sends context request to the AMF of the first core net by Nx interface.

The request of 4a. session management: MME sends session management request to PGW-C+SMF.

The response of 4b. session management: PGW-C+SMF sends session management response to MME.

5. context response: AMF inquires the first S-NSSAI of UE according to the IMSI of UE, is gone according to the first S-NSSAI NSSF module obtains corresponding first DCN-ID, issues MME in context response (Context Response).

MME executes MME selection process after receiving context, and MME judges whether to need gravity treatment MME according to the first DCN-ID, TAU request message (including the first DCN-ID) is routed to base station by MME if necessary, and base station is made to execute the selection process of DCN, The correct MME of final choice.

6. creating session request: MME sends creation session request to SGW, and MME creates the session of target network, and gets through Downlink data channel.

7. modifying bearing requirements；

7a. session modification；

8. modification carrying response；

9. creating conversational response；

10a.TAU access；

10b.TAU response: MME notice UE target side network (the second core net) is ready for, and completes TAU.

Other side according to the present embodiment when UE is in connection status, is obtained when the network of UE is switched to 4G by 5G The step of international mobile subscriber identity IMSI of UE, comprising:

Wherein, when UE is in connection status, the first switching request is initiated from NG-RAN to the first core net, and cut first It changes in request and carries the IMSI of UE, when the first core net receives the first switching request for carrying the IMSI of UE, from first The IMSI of UE is obtained in switching request.

Preferably, step 203 includes:

Re-positioning request is sent to the second network element；

Wherein, when the first core net obtains the IMSI of UE, and inquires a S-NSSAI of UE according to the IMSI of UE, First DCN-ID corresponding with the first S-NSSAI is further inquired according to the first corresponding relationship, and to corresponding with the first DCN-ID The second network element send re-positioning request (Relocation Request), the second network element of instruction is according to re-positioning request, notice UE is by network switching to the second network element, that is to say, that the second network element for receiving re-positioning request is the target network of handover operation Member.

As the second example, referring to fig. 4, schematic diagram of a scenario shown in Fig. 4 is when the network of UE is switched to 4G by 5G, at UE Scene when connection status, wherein SGW is gateway, and PGW-C+SMF is the user plane gateway of session level, PGW-U+UPF For the control plane gateway of session level；Entity of the AMF as the first core net, entity of the MME as the second core net；Switching flow It mainly comprises the steps that

1. switching request: NG-RAN initiates switching request (the first switching request) to the first core net (AMF), and is switching The IMSI that UE is carried in request, when the first core net receives the switching request for carrying the IMSI of UE, from switching request Obtain the IMSI of UE.

2a. session management request: AMF to PGW-C+SMF send session management request, including session management context and Grouping system (Evolved Packet System, EPS) context of evolution.

The response of 2b. session management: PGW-C+SMF sends session management response to AMF.

3. re-positioning request: when AMF inquires a S-NSSAI of UE according to the IMSI of UE, further according to first pair Relational query first DCN-ID corresponding with the first S-NSSAI is answered, and is sent to second network element MME corresponding with the first DCN-ID Re-positioning request (Relocation Request), the second network element of instruction notify UE by network switching extremely according to re-positioning request Second network element.

4. creating session request: MME selects SGW to create session.

5. creating conversational response；

6. switching request；MME sends switching request to base station.

7. handoff response；

8. relocation response: AMF reply relocation response informs that target network is ready for after MME receives response；

9. session modification；

10a. switching requires；

10b. switching requires；

11a. switching is completed；

11b. switching notice；

Wherein, step 10-11, AMF notice UE target network are ready for, and can start to switch.

12. modifying bearing requirements；

13a. modifies bearing requirements；

14. session modification；

15. modification carrying response；

16. modification carrying response；

Wherein, step 12-16, MME and PGW-C+SMF, between by send modification bearing requirements/response, get through downlink Data channel.

In the above embodiment of the present invention, when the network of UE is switched to 4G by 5G, pass through the first preset core net First corresponding relationship of the network element ID information of network element ID information and the second core net, when carry out 4G network and 5G network it Between handover operation when, corresponding with the first network element ID information the second network element ID letter can be searched according to the first corresponding relationship Breath, and indicate that UE switches to the second network element corresponding with the second network element ID information, the handover operation that 4G is switched to by 5G is completed, Avoid occurring situations such as handover failure or switching overtime in handoff procedure.The present invention solve in the prior art only support 4G and The slice or DCN of 5G network internal select, not aiming at the problem that solution for the scene that interoperates.

Referring to Fig. 5, another embodiment of the present invention provides a kind of method for switching network, is applied to the first core net, should Method includes:

Step 501, the first network element ID information second of user equipment (UE) affiliated network element in the first core net is obtained DCN-ID。

In the present embodiment, the first core net is 4G network, and the source network of UE, the second core net is 5G network, the target of UE Network；Wherein, the network element of 4G network is mainly MME, and the network element of 5G network is mainly AMF.Network element ID information is used to indicate tool The network element of body, the corresponding target network element of the corresponding network element, that is, handover operation of the 2nd DCN-ID.

Step 502, according to the network element ID information of the first core net and the second of the network element ID information of the second core net Corresponding relationship determines the second network element ID information corresponding with the first network element ID information；

Wherein, twoth S-NSSAI corresponding with the 2nd DCN-ID is determined according to the second corresponding relationship.

Wherein, the first network element ID information i.e. the 2nd DCN-ID, the second network element ID information are corresponding with the 2nd DCN-ID The 2nd S-NSSAI；According to the second corresponding relationship, twoth S-NSSAI, twoth S-NSSAI corresponding with the 2nd DCN-ID are inquired For the target network element of handover operation.

Step 503, according to the second network element ID information, indicate that UE switches to the second core net.

Wherein, it after the 2nd S-NSSAI of the second network element ID information is determined, is determined according to the 2nd S-NSSAI corresponding The network element of second core net indicates UE by network switching into the network element.

One aspect according to the present embodiment when UE is in idle condition, is obtained and is used when the network of UE is switched to 5G by 4G Family equipment UE is in the first core net the step of the first network element ID two DCN-ID of information of affiliated network element, comprising:

Wherein, when the network of UE is switched to 5G by 4G, when UE is in idle condition, UE sends registration request to NG-RAN (Registration Request), and registration request type is mobility more new registration (Mobility Registration Update), then UE carries the first network element ID information of affiliated network element in the first core net in Non-Access Stratum (NAS) message Two DCN-ID；When NG-RAN receives the NAS message, any one network element AMF transmission into the second core net is carried The registration request of 2nd DCN-ID；When AMF receives the registration request, the 2nd DCN-ID therein is obtained.

As third example, referring to Fig. 6, the network that scene shown in fig. 6 is UE is switched to 5G by 4G, and UE is in idle shape When state, wherein SGW is gateway, and PGW-C+SMF is the user plane gateway of session level, and PGW-U+UPF is the control of session level Veil closes；Entity of the MME as the first core net, entity of the AMF as the second core net；Switching flow mainly includes following step It is rapid:

1. registration request: UE sends registration request (Registration Request) to NG-RAN, and registration request class Type is mobility more new registration (Mobility Registration Update), then UE takes in Non-Access Stratum (NAS) message The 2nd DCN-ID of the first network element ID information with affiliated network element in the first core net.

2.AMF selection；

3. registration request:

Step 2-3, when NG-RAN receives the NAS message, any one network element AMF into the second core net is sent Carry the registration request of the 2nd DCN-ID；When AMF receives the registration request, acquisition the 2nd DCN-ID therein, and according to Second corresponding relationship, inquires twoth S-NSSAI corresponding with the 2nd DCN-ID, and the 2nd S-NSSAI is the target network of handover operation Member, AMF is according to the 2nd S-NSSAI selection target AMF.

4.AMF obtains context to MME and gets through downlink data channel；

5. registration response；

6. registration is completed；

Step 5-6, AMF notice UE target side network is ready for, and completes registration.

Other side according to the present embodiment, when the network of UE is switched to 5G by 4G, when UE is in connection status, to Two core nets send the forwarding weight for carrying UE the 2nd DCN-ID of the first network element ID information of affiliated network element in the first core net Location Request, the second core net of instruction obtain the 2nd DCN-ID of UE from forwarding re-positioning request.

Wherein, when the network of UE is switched to 5G by 4G, when UE is in connection status, switching stream can be initiated by the first core net Journey；MME sends the first network element mark for carrying UE affiliated network element in the first core net to the network element of any one the second core net Know the forwarding re-positioning request of the 2nd DCN-ID of information, and indicates that the second core net obtains the of UE from forwarding re-positioning request Two DCN-ID, i.e. instruction AMF obtain the 2nd DCN-ID, and determine twoth S- corresponding with the 2nd DCN-ID according to the 2nd DCN-ID Whether NSSAI is finally that the corresponding target network element of the 2nd S-NSSAI decides whether to execute switching flow according to itself.

Other side according to the present embodiment, when the network of UE is switched to 5G by 4G, when UE is in connection status, the party Method further include:

Wherein, when the network of UE is switched to 5G by 4G, UE is in connection status, initiates switching flow by the first core net When；The carrying UE that the evolution land radio access web E-UTRAN that MME receives Universal Mobile Communication System is sent is in the first core When the switching request of the 2nd DCN-ID of the first network element ID information of the first network element belonging in net, can according to UE it is currently used the Two DCN-ID and the second corresponding relationship determine the 2nd S-NSSAI, and directly to target network element corresponding with the 2nd S-NSSAI Re-positioning request is sent, indicates that the network switching of UE to the second core net, that is, is switched to target network element by target network element.

As the 4th example, referring to Fig. 7, the network that scene shown in Fig. 7 is UE is switched to 5G by 4G, and UE is in connection shape When state.Wherein, SGW is gateway, and PGW-C+SMF is the user plane gateway of session level, and PGW-U+UPF is the control of session level Veil closes；Entity of the MME as the first core net, entity of the AMF as the second core net；Switching flow mainly includes following step It is rapid:

1. switching initialization；

2. switching request；

Step 1-2, E-UTRAN initiate switching request to MME.

3. forwarding re-positioning request: the 2nd DCN-ID and the second corresponding relationship that MME can be currently used according to UE, determine 2nd S-NSSAI, and re-positioning request directly is sent to target network element corresponding with the 2nd S-NSSAI, instruction target network element will The network switching of UE is switched to target network element to the second core net；

2nd DCN-ID can be also encapsulated in forwarding re-positioning request by MME, be sent to any one AMF, which passes through Nx Interface goes NSSF module to obtain corresponding 2nd S-NSSAI, and AMF judges whether to need gravity treatment AMF, Reroute if necessary NAS message simultaneously carries all information passed over from MME；

Protocol Data Unit 4. (PDU) session switching request；

5. session modification；

6.PDU session handoff response；

Step 4-6, target AMF initiate PDU and handover request to SMF+PGW-C, get through upstream data channel；

7. switching request；

8. handoff response；

Step 7-8, AMF send switching request message to NG-RAN, and notice NG-RAN creates corresponding resource.

9.PDU session modification

10.PDU session modification

11. establishing data forwarding channel.

Step 9-11 gets through downlink data by sending PDU activation modification requirement/response between AMF and SMF+PGW-C Channel.

In the above embodiment of the present invention, when the network of UE is switched to 5G by 4G, pass through the first preset core net Second corresponding relationship of the network element ID information of network element ID information and the second core net, when carry out 4G network and 5G network it Between handover operation when, corresponding with the first network element ID information the second network element ID letter can be searched according to the second corresponding relationship Breath, and indicate that UE switches to the second network element corresponding with the second network element ID information, the handover operation that 5G is switched to by 4G is completed, Avoid occurring situations such as handover failure or switching overtime in handoff procedure.The present invention solve in the prior art only support 4G and The slice or DCN of 5G network internal select, not aiming at the problem that solution for the scene that interoperates.

Referring to Fig. 8, the embodiments of the present invention also provide a kind of network switching devices, are applied to the first core net, the dress It sets and includes:

Data obtaining module 801, for obtaining the first network element ID information of the first core net belonging to user equipment (UE)；

Information determination module 802, for according to the network element ID information of the first core net and the network element mark of the second core net Know the corresponding relationship of information, determines the second network element ID information corresponding with the first network element ID information；

Switch indicating module 803, for indicating that UE switches to the second core net according to the second network element ID information；Wherein, First core net is different from the network type of the second core net.

Preferably, data obtaining module 801 includes:

First acquisition submodule is used for:

Obtain the international mobile subscriber identity IMSI of UE；

Preferably, information determination module 802 includes:

First determines that submodule is used for:

Preferably, switching indicating module 803 includes:

Preferably, the first acquisition submodule includes:

Preferably, the first instruction submodule includes:

Preferably, the first acquisition submodule includes:

Preferably, switching indicating module 803 includes:

Re-positioning request is sent to the second network element；

Preferably, data obtaining module 801 includes:

Third acquisition submodule is used for:

Or

Preferably, information determination module 802 includes:

Second determines submodule, is used for:

Preferably, the device further include:

Referring to Fig. 9, another embodiment of the present invention provides a kind of method for switching network, is applied to the second core net, should Method includes:

Step 901, the second network element ID information corresponding with the first network element ID information of the first core net is obtained；Second Network element ID information is true according to the network element ID information of the first core net and the corresponding relationship of the identification information of the second core net Fixed；Wherein, the first core net is different from the network type of the second core net.

First core net is the source network of UE, and the second core net is the target network of UE；Wherein, the network element of 4G network is main For MME, the network element of 5G network is mainly AMF.Network element ID information is used to indicate specific network element.

When executing switching flow, the second core net obtains the second network element ID information first.

In the embodiment of the present invention, the first core-network side or the second core-network side are previously provided with the network element of the first core net The corresponding relationship of the network element ID information of identification information and the second core net, the i.e. S- of DCN-ID and the 5G network of 4G network The corresponding relationship of NSSAI (or DCN-ID of the S-NSSAI and 4G network of 5G net).

Wherein, corresponding relationship can be stored to NSSF module, when the first core net is 4G network, MME and NSSF module Between be provided with interface, for MME obtain the first core net network element ID information and the second core net network element ID information Corresponding relationship.

Step 902, according to the second network element ID information, by the second core net of user equipment UE access.

Wherein, after the second network element ID information determines, according to second network element ID information the second core net of UE access.

Specifically, when the network of UE is switched to 4G by 5G, when UE is in idle condition, UE is to the second core net (4G network) It sends trace regions and updates (Tracking Area Update, TAU) request, position is re-started in the second core net with request It registers to change the location information for the mobile station (UE) that the second core net is stored, when the MME of 4G network receives TAU request When, when sending context request to the first core net (5G network), the IMSI of UE is carried in context request, in this way, working as The IMSI for carrying UE that first core net receives the transmission of the second core net is carried in context request, can be from context request The middle IMSI for obtaining UE.

Wherein, when the network of UE is switched to 4G by 5G, when UE is in idle condition, when the first core net obtains UE's IMSI, and the first S-NSSAI of UE is inquired according to the IMSI of UE, it, will in the context response for being sent to the second core net First DCN-ID corresponding with the first S-NSSAI is encapsulated in context response, and the second core net, which receives, carries first When the context response of DCN-ID, the first DCN-ID is obtained from context response.

Wherein, as a specific example, function performed by the entity referring to the second core net in above-mentioned first example, this hair Details are not described herein for bright embodiment.

Wherein, after the first DCN-ID is determined, the second core net determines the second core net corresponding with the first DCN-ID The second network element, and the instruction information comprising the first DCN-ID is sent to UE.

Preferably, this method further include:

Receive the re-positioning request of the first core net transmission；

Wherein, when the network of UE is switched to 4G by 5G, and UE is in connection status, the first core net obtains UE's IMSI, and when inquiring a S-NSSAI of UE according to the IMSI of UE, further according to corresponding relationship inquiry and the first S- Corresponding first DCN-ID of NSSAI, and re-positioning request (Relocation is sent to the second network element corresponding with the first DCN-ID Request), the second network element of instruction notifies UE by network switching to the second network element according to re-positioning request, that is to say, that receives The second network element to re-positioning request is the target network element of handover operation.When the network element of the second core net receives re-positioning request When, the network switching of UE according to re-positioning request, can be indicated to the network element.

Wherein, as a specific example, function performed by the entity referring to the second core net in above-mentioned second example, this hair Details are not described herein for bright embodiment.

Wherein, when the network of UE is switched to 5G by 4G, and UE is in connection status, switching stream is initiated by the first core net Cheng Shi, if the MME of the second core net receives the switching request for carrying the 2nd DCN-ID of E-UTRAN transmission, MME is by the Two DCN-ID are encapsulated in forwarding re-positioning request, and forwarding re-positioning request is sent to the second core net.Second core net root The second network element corresponding with the 2nd DCN-ID is determined according to the second corresponding relationship；If the AMF for receiving forwarding re-positioning request is not Second network element, then execute switching again.

Wherein, as a specific example, function performed by the entity referring to the second core net in above-mentioned 4th example, this hair Details are not described herein for bright embodiment.

In the above embodiment of the present invention, pass through the network element ID information of preset first core net and the net of the second core net The corresponding relationship of first identification information obtains and the first core net when carrying out the handover operation between 4G network and 5G network The corresponding second network element ID information of the first network element ID information, and according to the second network element ID information, by user equipment (UE) The second core net is accessed, the handover operation between 4G network and 5G network is completed, avoids occurring handover failure in handoff procedure Or situations such as switching overtime.The present invention solves the slice for only supporting 4G and 5G network internal in the prior art or DCN selection, does not have Have aiming at the problem that solution for the scene that interoperates.

Referring to Figure 10, another embodiment of the present invention provides a kind of network switching device, is applied to the second core net, dress It sets and includes:

Identifier acquisition module 1001, for obtaining the second network element corresponding with the first network element ID information of the first core net Identification information；Second network element ID information is the identification information of the network element ID information and the second core net according to the first core net Corresponding relationship determine；

Network access module 1002 is used for according to the second network element ID information, by the second core net of user equipment UE access； Wherein, the first core net is different from the network type of the second core net.

Preferably, identifier acquisition module 1001 includes:

Preferably, network access module 1002 includes:

Preferably, the device further include:

In addition it should be pointed out that in the apparatus and method of the present invention, it is clear that each component or each step are can to divide It solves and/or reconfigures.These, which decompose and/or reconfigure, should be regarded as equivalent scheme of the invention.Also, execute above-mentioned system The step of column processing, can execute according to the sequence of explanation in chronological order naturally, but not need centainly suitable according to the time Sequence executes, and certain steps can execute parallel or independently of one another.For those of ordinary skill in the art, it is to be understood that this The whole or any steps or component of the method and apparatus of invention, can any computing device (including processor, storage Medium etc.) perhaps to be realized with hardware, firmware, software or their combination in the network of computing device, this is this field Basic programming skill of the those of ordinary skill in the case where having read explanation of the invention with them can be achieved with.

Therefore, the purpose of the present invention can also by run on any computing device a program or batch processing come It realizes.The computing device can be well known fexible unit.Therefore, the purpose of the present invention can also include only by offer The program product of the program code of the method or device is realized to realize.That is, such program product is also constituted The present invention, and the storage medium for being stored with such program product also constitutes the present invention.Obviously, the storage medium can be Any well known storage medium or any storage medium that developed in the future.It may also be noted that of the invention In device and method, it is clear that each component or each step can be decomposed and/or be reconfigured.These decomposition and/or again group Conjunction should be regarded as equivalent scheme of the invention.Also, the step of executing above-mentioned series of processes can be naturally according to the sequence of explanation It executes in chronological order, but does not need centainly to execute sequentially in time.Certain steps can parallel or independently of one another It executes.

The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims

1. a kind of method for switching network is applied to the first core net, which is characterized in that the described method includes:

According to the corresponding relationship of the network element ID information of the first core net and the network element ID information of the second core net, determining and institute State the corresponding second network element ID information of the first network element ID information；

According to the second network element ID information, indicate that the UE switches to the second core net；Wherein, first core net with The network type of second core net is different.

2. the method according to claim 1, wherein described obtain first core net belonging to user equipment (UE) The step of first network element ID information, comprising:

Obtain the first network element ID information of UE affiliated first network element in first core net；

The acquisition UE is in first core net the step of the first network element ID information of affiliated first network element, comprising:

Obtain the international mobile subscriber identity IMSI of UE；

According to the IMSI, inquiry the first single network corresponding with the IMSI, which is sliced, selects auxiliary information S-NSSAI, and first S-NSSAI is the first network element ID information of the UE affiliated first network element in first core net.

3. according to the method described in claim 2, it is characterized in that, the network element ID information according to the first core net and the The corresponding relationship of the network element ID information of two core nets determines the second network element ID corresponding with the first network element ID information The step of information, comprising:

First corresponding relationship of the network element ID information of the network element ID information according to the first core net and the second core net, The step of determining the second network element ID information corresponding with the first network element ID information, comprising:

According to the first corresponding relationship of the network element ID information of the first core net and the network element ID information of the second core net, determine First dedicated core network identifier DCN-ID corresponding with the first S-NSSAI, the first DCN-ID are and first network element The corresponding second network element ID information of identification information.

4. according to the method described in claim 3, it is characterized in that, described according to the second network element ID information, instruction institute State the step of UE switches to the second core net, comprising:

According to the second network element ID information, indicate that the UE is extremely corresponding with the second network element ID information by network switching The second network element.

5. according to the method described in claim 4, it is characterized in that, the international mobile subscriber identity IMSI for obtaining UE Step, comprising:

The context for receiving the international mobile subscriber identity IMSI for carrying the UE that second core net is sent is asked When asking, the IMSI of the UE is obtained from the context request.

6. according to the method described in claim 5, it is characterized in that, described according to the second network element ID information, instruction institute State the step of UE is by network switching to the second network element corresponding with the second network element ID information, comprising:

First DCN-ID is encapsulated in the context response for the context request and is sent to second core Net；

Indicate that second core net according to the first DCN-ID, determines the second network element corresponding with the first DCN-ID, Indicate the UE by network switching to second network element.

7. according to the method described in claim 4, it is characterized in that, the international mobile subscriber identity IMSI for obtaining UE Step, comprising:

Receive the of the IMSI for carrying the UE of the Next-Generation networking NG-RAN from first core net When a handover request, the IMSI of the UE is obtained from first switching request.

8. the method according to the description of claim 7 is characterized in that described according to the second network element ID information, instruction institute State the step of UE switches to the second core net, comprising:

Re-positioning request is sent to second network element；

Indicate that second network element according to the re-positioning request, notifies the UE by network switching to second network element.

9. the method according to claim 1, wherein described obtain first core net belonging to user equipment (UE) The step of first network element ID information, comprising:

The step for obtaining user equipment (UE) the 2nd DCN-ID of the first network element ID information of affiliated network element in the first core net Suddenly, comprising:

Receive the first network element ID information second for carrying the UE affiliated network element in the first core net from NG-RAN When DCN-ID registration request, the 2nd DCN-ID is obtained from the registration request；

Or

The the first network element ID information second for carrying UE affiliated network element in the first core net is sent to the second core net The forwarding re-positioning request of DCN-ID indicates that second core net obtains the of the UE from the forwarding re-positioning request Two DCN-ID.

10. according to the method described in claim 9, it is characterized in that, the network element ID information according to the first core net with The corresponding relationship of the network element ID information of second core net determines the second network element mark corresponding with the first network element ID information The step of knowing information, comprising:

According to the second corresponding relationship of the network element ID information of first core net and the network element ID information of the second core net, Determine the second network element ID information corresponding with the first network element ID information；

The second of the network element ID information according to second core net and the network element ID information of the first core net is corresponding The step of relationship, determining the second network element ID information corresponding with the first network element ID information, comprising:

The second of the network element ID information according to first core net and the network element ID information of the second core net is corresponding Relationship determines that twoth S-NSSAI corresponding with the 2nd DCN-ID, the 2nd S-NSSAI are and the first network element mark Know the corresponding second network element ID information of information.

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

The carrying UE of evolution land radio access web E-UTRAN transmission of Universal Mobile Communication System is received in the first core When the switching request of the 2nd DCN-ID of the first network element ID information of the first network element belonging in heart net, obtain in the switching request The 2nd DCN-ID；

2nd DCN-ID is encapsulated in re-positioning request, the re-positioning request is sent to second core net.

12. the method according to claim 1, wherein the corresponding relationship is stored in network slice selection function In NSSF module.

13. a kind of method for switching network is applied to the second core net, which is characterized in that the described method includes:

Obtain the second network element ID information corresponding with the first network element ID information of the first core net；Second network element ID Information is determined according to the corresponding relationship of the identification information of the network element ID information and second core net of the first core net；

According to the second network element ID information, by the second core net described in user equipment UE access；Wherein, first core net with The network type of second core net is different.

14. according to the method for claim 13, which is characterized in that the first network element ID of the acquisition and the first core net Before the step of information corresponding second network element ID information, comprising:

When receiving the TAU request for the international mobile subscriber identity IMSI for carrying the UE that the UE is sent, TAU is obtained The IMSI carried in request；

The IMSI is encapsulated in context request, the context request is sent to first core net.

15. according to the method for claim 14, which is characterized in that the first network element ID of the acquisition and the first core net The step of information corresponding second network element ID information, comprising:

Receive the context response for the context request that first core net is sent；

Obtain the dedicated core network identifier DCN-ID of first carried in the context response, the first DCN-ID is and described the The corresponding second network element ID information of one network element ID information.

16. according to the method for claim 15, which is characterized in that it is described according to the second network element ID information, user is set The step of second core net described in standby UE access, comprising:

According to the first DCN-ID, determines the second network element of the second core net corresponding with the first DCN-ID, will include The instruction information of second network element is sent to the UE.

17. according to the method for claim 13, which is characterized in that further include:

Receive the re-positioning request that first core net is sent；

According to the re-positioning request, indicate the network switching of the UE to second core net.

18. according to the method for claim 13, which is characterized in that further include:

When receiving the forwarding re-positioning request that first core net is sent, by the network switching of the UE to second core Heart net.

19. a kind of network switching device, it is applied to the first core net, which is characterized in that described device includes:

Information determination module, for according to the network element ID information of the network element ID information and the second core net of the first core net Corresponding relationship determines the second network element ID information corresponding with the first network element ID information；

Switch indicating module, for indicating that the UE switches to the second core net according to the second network element ID information；Its In, first core net is different from the network type of second core net.

20. device according to claim 19, which is characterized in that the data obtaining module includes:

First acquisition submodule, for obtaining the first network element ID letter of UE affiliated first network element in first core net Breath；

First acquisition submodule is used for:

Obtain the international mobile subscriber identity IMSI of UE；

21. device according to claim 20, which is characterized in that the information determination module includes:

First determines submodule, for according to the network element ID information of the first core net and the network element ID information of the second core net The first corresponding relationship, determine corresponding with the first network element ID information the second network element ID information；

Described first determines that submodule is used for:

22. device according to claim 21, which is characterized in that the switching indicating module includes:

First instruction submodule, for according to the second network element ID information, indicate the UE by network switching to it is described Corresponding second network element of second network element ID information.

23. device according to claim 22, which is characterized in that first acquisition submodule includes:

First IMSI acquiring unit, the international mobile subscriber for carrying the UE sent for receiving second core net When the context request of identification code IMSI, the IMSI of the UE is obtained from the context request.

24. device according to claim 23, which is characterized in that described first indicates that submodule includes:

First indicating unit is sent out for being encapsulated in the first DCN-ID in the context response for the context request Give second core net；

25. device according to claim 21, which is characterized in that first acquisition submodule includes:

2nd IMSI acquiring unit, for receiving taking for the Next-Generation networking NG-RAN from first core net When the first switching request of the IMSI with the UE, the IMSI of the UE is obtained from first switching request.

26. device according to claim 25, which is characterized in that the switching indicating module includes:

Re-positioning request is sent to second network element；

27. device according to claim 19, which is characterized in that the data obtaining module includes:

Third acquisition submodule, for obtaining the first network element ID information of user equipment (UE) affiliated network element in the first core net 2nd DCN-ID；

The third acquisition submodule is used for:

Or

28. device according to claim 27, which is characterized in that the information determination module includes:

Second determines submodule, for according to the network element ID information of first core net and the network element ID of the second core net Second corresponding relationship of information determines the second network element ID information corresponding with the first network element ID information；

Described second determines submodule, is used for:

29. device according to claim 27, which is characterized in that further include:

Forwarding module is requested, what the evolution land radio access web E-UTRAN for receiving Universal Mobile Communication System was sent The UE is carried in the first core net when the switching request of the 2nd DCN-ID of the first network element ID information of affiliated first network element, Obtain the 2nd DCN-ID in the switching request；

30. device according to claim 19, which is characterized in that the corresponding relationship is stored in network slice selection function In NSSF module.

31. a kind of core net including memory, processor and stores the computer that can be run on a memory and on a processor Program, which is characterized in that the processor is realized as described in any one of claims 1 to 12 when executing the computer program Method for switching network in step.

32. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor The step in the method for switching network as described in any one of claims 1 to 12 is realized when execution.

33. a kind of network switching device, it is applied to the second core net, which is characterized in that described device includes:

Identifier acquisition module, for obtaining the second network element ID letter corresponding with the first network element ID information of the first core net Breath；The second network element ID information is believed according to the network element ID information of the first core net and the mark of second core net What the corresponding relationship of breath determined；

Network access module is used for according to the second network element ID information, by the second core net described in user equipment UE access；Its In, first core net is different from the network type of second core net.

34. device according to claim 33, which is characterized in that the identifier acquisition module includes:

IMSI acquisition submodule, the international mobile subscriber identity IMSI for carrying the UE sent for receiving the UE TAU request when, obtain the IMSI that carries in TAU request；

35. device according to claim 34, which is characterized in that the identifier acquisition module includes:

DCN-ID acquisition submodule is rung for receiving the context for the context request that first core net is sent It answers；

36. device according to claim 35, which is characterized in that the network access module includes:

Information sending submodule, for determining the second core corresponding with the first DCN-ID according to the first DCN-ID Second network element of net, is sent to the UE for the instruction information comprising second network element.

37. device according to claim 33, which is characterized in that further include:

Network handover module, the re-positioning request sent for receiving first core net；

38. device according to claim 33, which is characterized in that further include:

Request receiving module, when for receiving the forwarding re-positioning request of the first core net transmission, by the net of the UE Network switches to second core net.

39. a kind of core net including memory, processor and stores the computer that can be run on a memory and on a processor Program, which is characterized in that the processor is realized when executing the computer program such as any one of claim 13 to 18 institute The step in method for switching network stated.

40. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor The step in the method for switching network as described in any one of claim 13 to 18 is realized when execution.