CN103338489B

CN103338489B - Inter-system switching method, device and network system

Info

Publication number: CN103338489B
Application number: CN201310261781.5A
Authority: CN
Inventors: 武绍芸; 任厚平; 姜志健
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-06-27
Filing date: 2013-06-27
Publication date: 2016-12-28
Anticipated expiration: 2033-06-27
Also published as: WO2014206251A1; CN103338489A

Abstract

A kind of inter-system switching method of embodiment of the present invention offer, device and network system, the method, including: the first core network element in the first system obtains user equipment (UE) CAMEL-Subscription-Information in second system；First core network element the second core network element in second system sends forward direction RELOCATION REQUEST message, forward direction RELOCATION REQUEST message comprises Context identifier, the value of Context identifier is the value of the Context identifier in UE CAMEL-Subscription-Information in second system, based on context identifying for the second core network element and determine the CAMEL-Subscription-Information corresponding with Context identifier, technical scheme can improve the success rate that UE switches between the first system and second system.

Description

Inter-system switching method, device and network system

Technical field

The present embodiments relate to communication technology, particularly relate to a kind of inter-system switching method, device and net Network system.

Background technology

Before Long Term Evolution (Long Term Evolution is called for short LTE) technology maturation, the whole world is Deploy substantial amounts of GPRS (general packet radio service) (General Packet Radio Service is called for short GPRS) Network, this network includes GSM EDGE Radio Access Network (GSM/EDGE Radio Access Network, is called for short GERAN), GERAN uses global system for mobile communications (Global System of Mobile communication, is called for short GSM) access technology (i.e. 2G), UMTS land is wireless connects Network (Universal Terrestrial Radio Access Network is called for short UTRAN) wireless network, UTRAN uses UMTS (Universal Mobile Telecommunications System, is called for short UMTS) access technology (i.e. 3G) and GPRS core net.LTE-EPS network Introducing is a process gradually carried out, and this network includes the UMTS Terrestrial radio access network of evolution (Evolved Universal Terrestrial Radio Access Network is called for short E-UTRAN) is wireless Network (use LTE access technology, i.e. 4G) and evolved packet system (Evolved Packet System, It is called for short EPS) core net.Operator cannot accomplish in one move and set up pure, an isolated EPS net Network.So 2/3G and 4G network will exist within the some time simultaneously.Correspondingly, terminal use is at 2/3G With the switching between 4G network will become frequent.

With UMTS(3G) and in the case of LTE(4G) coexisting, UE carries out business in LTE network, When the covering (signal) of UMTS network is better than LTE network, or base station (evolved Node B, It is called for short eNodeB) when load is heavier, or UE moves to UMTS from LTE overlay area Behind overlay area, eNodeB can trigger UE and be switched to UMTS network.

But, prior art is in the first system (such as 4G system) and second system (such as 2/3G system System) between handoff procedure in there is the subscriber equipment (User that the core network element of second system gets Equipment, is called for short UE) the inaccurate problem of CAMEL-Subscription-Information in second system.

Summary of the invention

The embodiment of the present invention provides a kind of inter-system switching method, device and network system, in order to realize UE Between the first system and second system during switching, the core network element of second system is accurately obtained UE The APN used CAMEL-Subscription-Information in second system, and then improve UE at the first system and second system Between switching success rate.

First aspect present invention, it is provided that a kind of inter-system switching method, including:

The first core network element in the first system obtains user equipment (UE) signing letter in second system Breath；

Described first core network element the second core network element in described second system sends forward direction and resets Position request message, comprises Context identifier, described Context identifier in described forward direction RELOCATION REQUEST message The value that value is the Context identifier in described UE CAMEL-Subscription-Information in described second system, for institute State the second core network element and determine the signing letter corresponding with described Context identifier according to described Context identifier Breath.

The first core net in the first possible implementation of first aspect, in described the first system Network element obtains user equipment (UE) CAMEL-Subscription-Information in second system, including:

Described first core network element sends location update request message to the second CAMEL-Subscription-Information storage network element, Described second CAMEL-Subscription-Information storage network element is the network element storing UE CAMEL-Subscription-Information in second system；

Described first core network element receives the first insertion label that described second CAMEL-Subscription-Information storage network element sends About data-message, comprises described UE in described second system in described first insertion subscription data message CAMEL-Subscription-Information.

According to the first possible implementation of first aspect, the reality that the second in first aspect is possible In existing mode,

Described first core network element receives the insertion signing number that described second CAMEL-Subscription-Information storage network element sends After message, also include:

Described first core network element sends the first insertion signing number to described second CAMEL-Subscription-Information storage network element According to response message；

Described first core network element receives the location updating of described second CAMEL-Subscription-Information storage network element transmission should Answer message.

In conjunction with the implementation that the first or the second of first aspect or first aspect are possible, in first party In the third possible implementation in face, described first core network element receives described second CAMEL-Subscription-Information After the first insertion subscription data message that storage network element sends, also include:

Described first core network element receives the second insertion label that described second CAMEL-Subscription-Information storage network element sends About data-message；

Described first core network element inserts the described UE in subscription data message in institute according to described second State the CAMEL-Subscription-Information in second system, update the described UE stored in described first core network element in institute State the CAMEL-Subscription-Information in second system；

Described first core network element sends the second insertion signing number to described second CAMEL-Subscription-Information storage network element According to response message.

In conjunction with the first of first aspect or first aspect to the third possible implementation, in first party In the 4th kind of possible implementation in face, described the first system is 2G system or 3G system, described Two system is 4G system；Or, described the first system is 4G system, and described second system is 2G system System or 3G system.

Second aspect present invention, it is provided that a kind of inter-system switching method, including:

Second CAMEL-Subscription-Information storage network element receives the position of the first core network element transmission in the first system more Newly requested message, described second CAMEL-Subscription-Information storage network element is storage user equipment (UE) label in second system The about network element of information；

Described second CAMEL-Subscription-Information storage network element sends the first insertion signing number to described first core network element According to message, described first inserts the signing letter comprising UE in subscription data message in described second system Breath, so that the second core network element that described first core network element is in described second system sends forward direction RELOCATION REQUEST message, comprises Context identifier, described context in described forward direction RELOCATION REQUEST message The value that value is the Context identifier in described UE CAMEL-Subscription-Information in described second system of mark.

In the first possible implementation of second aspect, described second CAMEL-Subscription-Information storage network element to After described first core network element sends the first insertion subscription data message, also include:

Described second CAMEL-Subscription-Information storage network element receives the first insertion label that described first core network element sends About data answering message；

Described second CAMEL-Subscription-Information storage network element sends location updating response to described first core network element and disappears Breath.

In conjunction with in the first possible implementation of second aspect or second aspect any one, second In the implementation that the second of aspect is possible, described second CAMEL-Subscription-Information storage network element is to described first core After heart network element sends the first insertion subscription data message, also include:

Described second CAMEL-Subscription-Information storage network element sends the second insertion signing number to described first core network element According to message so that described first core network element according to described second insert in subscription data message described in UE CAMEL-Subscription-Information in described second system, updates in described first core network element the described of storage UE CAMEL-Subscription-Information in described second system；

Described second CAMEL-Subscription-Information storage network element receives the second insertion label that described first core network element sends About data answering message.

In conjunction with any one in the implementation that the first or the second of second aspect or second aspect are possible Kind, in the third possible implementation of second aspect, described second CAMEL-Subscription-Information storage network element connects After receiving the location update request message that the first core network element sends, also include:

Described second CAMEL-Subscription-Information storage network element sends canceling position registration message to the 3rd core network element, Described 3rd core network element is that UE described in described second system adhered to, except described second core Core network element beyond network element, so that described 3rd core network element deletes locally stored described UE Contextual information；

Described second CAMEL-Subscription-Information storage network element receives the canceling position note that described 3rd core network element sends Volume response message.

In conjunction with the first of second aspect or second aspect to any one in the third possible implementation Kind, in the 4th kind of possible implementation of second aspect, described the first system is 2G system or 3G System, described second system is 4G system；Or, described the first system is 4G system, described second System is 2G system or 3G system.

Third aspect present invention, it is provided that a kind of inter-system switching method, including:

The second core network element in second system receives what the first core network element in the first system sent Forward direction RELOCATION REQUEST message, comprises Context identifier in described forward direction RELOCATION REQUEST message, described on The value hereafter identified is the Context identifier in user equipment (UE) CAMEL-Subscription-Information in described second system Value；

Described second core network element determines corresponding with described Context identifier according to described Context identifier CAMEL-Subscription-Information.

Fourth aspect present invention, it is provided that a kind of intersystem handover device, including:

Acquisition module, for obtaining user equipment (UE) CAMEL-Subscription-Information in second system；

Sending module, sending forward direction reorientation for the second core network element in described second system please Seek message, described forward direction RELOCATION REQUEST message comprises Context identifier, the value of described Context identifier For the value of the Context identifier in described UE CAMEL-Subscription-Information in described second system, for described Two core network elements determine the CAMEL-Subscription-Information corresponding with described Context identifier according to described Context identifier.

In the first possible implementation of fourth aspect, described acquisition module, specifically for:

Sending location update request message to the second CAMEL-Subscription-Information storage network element, described second CAMEL-Subscription-Information is deposited Storage network element is the network element storing UE CAMEL-Subscription-Information in second system；

Receive the first insertion subscription data message that described second CAMEL-Subscription-Information storage network element sends, described the One insertion subscription data message comprises described UE CAMEL-Subscription-Information in described second system.

According to the first possible implementation of fourth aspect, the reality that the second in fourth aspect is possible In existing mode, described acquisition module, it is additionally operable to receiving what described second CAMEL-Subscription-Information storage network element sent After inserting subscription data message, send the first insertion signing number to described second CAMEL-Subscription-Information storage network element According to response message；

Receive the position update response information that described second CAMEL-Subscription-Information storage network element sends.

In conjunction with the implementation that the first or the second of fourth aspect or fourth aspect are possible, in four directions In the third possible implementation in face, described acquisition module, it is additionally operable to receiving described second signing After the first insertion subscription data message that information storage network element sends, receive described second CAMEL-Subscription-Information and deposit The second insertion subscription data message that storage network element sends；

The signing in described second system of the described UE in subscription data message is inserted according to described second Information, updates the described UE of storage signing in described second system in described first core network element Information；

The second insertion subscription data response message is sent to described second CAMEL-Subscription-Information storage network element.

In conjunction with the first of fourth aspect or fourth aspect to the third possible implementation, in four directions In the 4th kind of possible implementation in face, described the first system is 2G system or 3G system, described Two system is 4G system；Or, described the first system is 4G system, and described second system is 2G system System or 3G system.

Fifth aspect present invention, it is provided that a kind of intersystem handover device, including:

Receiver module, for receiving the position updating request that the first core network element in the first system sends Message, described second CAMEL-Subscription-Information storage network element is storage user equipment (UE) CAMEL-Subscription-Information in second system Network element；

Sending module, for sending the first insertion subscription data message, institute to described first core network element State in the first insertion subscription data message and comprise UE CAMEL-Subscription-Information in described second system, so that institute State first core network element the second core network element in described second system and send forward direction re-positioning request Message, comprises Context identifier in described forward direction RELOCATION REQUEST message, the value of described Context identifier is The value of the Context identifier in described UE CAMEL-Subscription-Information in described second system.

In the first possible implementation of the 5th aspect, described receiver module, it is additionally operable to institute After stating first core network element transmission the first insertion subscription data message, receive described first core net net The first insertion subscription data response message that unit sends；

Described sending module, is additionally operable to send position update response information to described first core network element.

In conjunction with in the first possible implementation of the 5th aspect or the 5th aspect any one, the 5th In the implementation that the second of aspect is possible, described sending module, it is additionally operable to deposit at the second CAMEL-Subscription-Information Storage network element is after described first core network element sends the first insertion subscription data message, to described first Core network element sends the second insertion subscription data message, so that described first core network element is according to described Second inserts the CAMEL-Subscription-Information in described second system of the described UE in subscription data message, updates institute State the described UE of storage CAMEL-Subscription-Information in described second system in the first core network element；

Described receiver module, is additionally operable to receive the second insertion signing number that described first core network element sends According to response message.

In conjunction with any one in the implementation that the first or the second of the 5th aspect or the 5th aspect are possible Kind, in the third possible implementation of the 5th aspect, described sending module, it is additionally operable to receiving After the location update request message that first core network element sends, send to the 3rd core network element and cancel Location registration message, described 3rd core network element be that UE described in described second system adhered to, Core network element in addition to described second core network element, so that described 3rd core network element deletes this The contextual information of the described UE of ground storage；

Described receiver module, the canceling position registration being additionally operable to receive described 3rd core network element transmission should Answer message.

In conjunction with the first of the 5th aspect or the 5th aspect to any one in the third possible implementation Kind, in the 4th kind of possible implementation of the 5th aspect, described the first system is 2G system or 3G System, described second system is 4G system；Or, described the first system is 4G system, described second System is 2G system or 3G system.

Sixth aspect present invention, it is provided that a kind of intersystem handover device, including:

Receiver module, the forward direction reorientation sent for receiving the first core network element in the first system please Seek message, described forward direction RELOCATION REQUEST message comprises Context identifier, the value of described Context identifier Value for the Context identifier in user equipment (UE) CAMEL-Subscription-Information in second system；

Processing module, for determining the signing corresponding with described Context identifier according to described Context identifier Information.

Seventh aspect present invention, it is provided that a kind of network system, including: such as fourth aspect or fourth aspect Intersystem handover device described in any one possible implementation, in terms of the 5th or in terms of the 5th Any one possible implementation described in intersystem handover device and as described in terms of the 6th Intersystem handover device.

Inter-system switching method, device and the network system that the embodiment of the present invention provides, passes through the first system In the first core network element first obtain UE CAMEL-Subscription-Information in second system, the first core net net Unit's the second core network element in second system again sends forward direction RELOCATION REQUEST message, forward direction reorientation Comprising Context identifier in request message, the value of Context identifier is UE signing letter in second system The value of the Context identifier in breath, determines and context so that based on context the second core network element identifies The CAMEL-Subscription-Information that mark is corresponding, it is possible to achieve when UE switches between the first system and second system, the The core network element of two system is accurately obtained the APN of UE use CAMEL-Subscription-Information in second system, And then improve the success rate that UE switches between the first system and second system.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that under, Accompanying drawing during face describes is some embodiments of the present invention, for those of ordinary skill in the art, On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

The flow chart of the inter-system switching method embodiment one that Fig. 1 provides for the present invention；

Fig. 2 is that in prior art, based on context SGSN identifies lookup APN CAMEL-Subscription-Information from HLR Schematic diagram；

The flow chart of the inter-system switching method embodiment two that Fig. 3 provides for the present invention；

The flow chart of the inter-system switching method embodiment three that Fig. 4 provides for the present invention；

The flow chart of the inter-system switching method embodiment four that Fig. 5 provides for the present invention；

The flow chart of the inter-system switching method embodiment five that Fig. 6 provides for the present invention；

The flow chart of the inter-system switching method embodiment six that Fig. 7 provides for the present invention；

The flow chart of the inter-system switching method embodiment seven that Fig. 8 provides for the present invention；

The structural representation of the intersystem handover device embodiment one that Fig. 9 provides for the present invention；

The structural representation of the intersystem handover device embodiment two that Figure 10 provides for the present invention；

The structural representation of the intersystem handover device embodiment three that Figure 11 provides for the present invention；

The structural representation of the intersystem handover device embodiment four that Figure 12 provides for the present invention；

The structural representation of the intersystem handover device embodiment five that Figure 13 provides for the present invention；

The structural representation of the intersystem handover device embodiment six that Figure 14 provides for the present invention；

The structural representation of the network system embodiment one that Figure 15 provides for the present invention.

Detailed description of the invention

For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this Accompanying drawing in bright embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention, Obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise The every other embodiment obtained, broadly falls into the scope of protection of the invention.

The flow chart of the inter-system switching method embodiment one that Fig. 1 provides for the present invention, as it is shown in figure 1, The inter-system switching method of the present embodiment includes:

The first core network element in S101, the first system obtains UE CAMEL-Subscription-Information in second system.

S102, the first core network element the second core network element in second system sends forward direction reorientation Request message, comprises Context identifier in forward direction RELOCATION REQUEST message, the value of Context identifier is UE The value of the Context identifier in CAMEL-Subscription-Information in second system, for the second core network element according to upper Hereafter mark determines the CAMEL-Subscription-Information corresponding with Context identifier.

Alternatively, the first system is 2G system or 3G system, and second system is 4G system；Or, The first system is 4G system, and second system is 2G system or 3G system.

Specifically, Serving GPRS Support Node (Serving GPRS Support Node is called for short SGSN) It is GPRS respectively with Mobility Management Entity (Mobility Management Entity is called for short MME) With EPS network processes the core network element of packet switch (Packet Switch, be called for short PS) signaling message, It should be noted that the SGSN in the present embodiment refers in GnGp-SGSN(i.e. 2/3G system SGSN).Attaching position register (Home Location Register is called for short HLR) is 2/3G net Network preserves the network element of user signing contract information, home subscriber server (Home Subscriber Server, It is called for short HSS) it is then the network element preserving user signing contract information in 4G network.

For example, if the first system is 2G system or 3G system, second system is 4G system, then First core network element is SGSN, and the second core network element is MME, the second CAMEL-Subscription-Information storage network element For HSS；If the first system is 4G system, second system is 2G system or 3G system, then the first core Heart network element is MME, and the second core network element is SGSN, and the second CAMEL-Subscription-Information storage network element is HLR.

UE handoff procedure from 4G to 3G may include that eNodeB initiates handover request to MME, MME notice SGSN carries out forward direction reorientation (Forward Relocation Request)；SGSN leads to Know that target radio network controller (Radio Network Controller is called for short RNC) sets up wireless money Source, and send relocation response to MME；If not direct transferring chain between eNodeB and Target RNC Road, MME needs to notify that gateway (Serving Gateway is called for short S-GW) sets up the non-chain that direct transfers Road；MME sends switching command by eNodeB to UE；ENodeB carries out data forwarding: if Direct transfer link, and eNodeB directly forwards the data to Target RNC；Without the link that direct transfers, ENodeB first forwards the data to S-GW, then is forwarded the data to Target RNC by S-GW；UE is complete Become switching and send wireless heterogeneous networks (Radio Resource Control is called for short RRC) to Target RNC Reconfigure completion message.UE completes after RRC reconfigures, Routing Area Identifier (Routing Area Identity, Be called for short RAI) change, need perform 4G to 3G Routing Area Update (Routing Area Update, It is called for short RAU) flow process；SGSN notice MME target side has completed reorientation, and MME responds reorientation Complete；SGSN notice GGSN updates contextual information；MME notice S-GW deletes session, and Notice eNodeB discharges resource.

In 4G to 2/3G handoff procedure, as the SGSN of target side, UE will be obtained from source MME Mobile management context and packet data protocol (Packet Data Protocol, be called for short PDP) context Information.Wherein PDP Context information contains APN (the Access Point that UE is currently in use Name, is called for short APN), and the out of Memory such as APN Context identifier (Context-Identifier). SGSN can obtain the 2/3G of this APN from HLR after getting APN or APN Context identifier Service profile.

The process that UE is switched to GREAN/UTRAN from LTE has clear and definite definition at 3GPP23401, In the preparatory stage of switching, the MME of source can pass through " Forward Relocation Request " message The information such as PDP Context (PDP Context) are sent to target side SGSN.

" Forward Relocation Request " message definition between MME to SGSN is at 3GPP 29060, message carries PDP Context cell, the APN that source MME can use 4G business, And PDP Context Identifier is filled in above-mentioned PDP Context cell and brings target side SGSN, After target side SGSN gets this APN information, in RAU flow process subsequently, pass through Update Location Request message obtains the subscription data of 2/3G from HLR.

Prior art is not distinctly claimed SGSN from HLR inquiry APN signing letter in 3GPP agreement Breath is as index with APN, or using Context Identifier as index, causes Ge Jia manufacturer to exist When realizing different.

When SGSN inquires about the CAMEL-Subscription-Information of APN as index from HLR using Context Identifier, Owing to this Context Identifier obtains from MME, and MME is when user 4G accesses Obtain from HSS inquiry, under HLR with HSS separates the scene realized, 2/3G subscription data and 4G Subscription data manages respectively, say, that for identical APN, HLR and HSS to its point The Context Identifier joined is it cannot be guaranteed that be identical.

Fig. 2 is that in prior art, based on context SGSN identifies lookup APN CAMEL-Subscription-Information from HLR Schematic diagram, as in figure 2 it is shown, SGSN obtains APN value from MME for a, Context identifier C1 be 1, as SGSN according to this C1 from the CAMEL-Subscription-Information of HLR request APN a, actual acquisition is but APN The CAMEL-Subscription-Information of b, it is inaccurate that this results in the CAMEL-Subscription-Information that SGSN obtains from HLR.

Still as a example by 4G to 2/3G handoff procedure, the present embodiment or is followed the tracks of by attachment as 4G user After district's renewal (Tracking Area Update is called for short TAU) is linked into MME, MME can initiate To location updating (Update Location) flow process of HSS, obtain the CAMEL-Subscription-Information of user, and notify The multidate information of this user of HSS.In the present embodiment, MME is when user's attachment or TAU, except doing Once arrive outside the Update Location flow process of HSS, to be also the Update Location once arriving HLR Flow process is to obtain the 2/3G CAMEL-Subscription-Information of this user, including the Context Identifier of APN.As this 4G When user occurs to 2/3G switching, MME is being sent to the Forward Relocation Request of SGSN In message, PDP Context Identifier is filled to the value in 2/3G CAMEL-Subscription-Information, so, target The SGSN of side is whether with APN, or Context Identifier is from the signing of HLR inquiry 2/3G Data, can accurately obtain.

The inter-system switching method that the present embodiment provides, first by the first core network element in the first system First obtain UE CAMEL-Subscription-Information in second system, the first core network element again in second system the Two core network elements send forward direction RELOCATION REQUEST message, comprise context in forward direction RELOCATION REQUEST message Mark, the value of Context identifier is the value of the Context identifier in UE CAMEL-Subscription-Information in second system, Based on context identify for the second core network element and determine the CAMEL-Subscription-Information corresponding with Context identifier, can With realize UE switch between the first system and second system time, the core network element of second system is accurate Get the APN CAMEL-Subscription-Information in second system that UE uses, and then improve UE at the first system And the success rate of switching between second system.

Further, S101 may include that

First core network element to second CAMEL-Subscription-Information storage network element send location update request message, second CAMEL-Subscription-Information storage network element is the network element storing UE CAMEL-Subscription-Information in second system；

First core network element receives the first insertion subscription data of the second CAMEL-Subscription-Information storage network element transmission and disappears Breath, comprises UE CAMEL-Subscription-Information in second system in the first insertion subscription data message.

Specifically, the first core network element can be by receiving what the second CAMEL-Subscription-Information storage network element sent First inserts subscription data message, obtains the UE comprised in the first insertion subscription data message second CAMEL-Subscription-Information in system.

Further, the first core network element receives the insertion signing that the second CAMEL-Subscription-Information storage network element sends After data-message, also include:

First core network element sends the first insertion subscription data response to the second CAMEL-Subscription-Information storage network element and disappears Breath；

First core network element receives the position update response information that the second CAMEL-Subscription-Information storage network element sends.

Further, the first core network element receive second CAMEL-Subscription-Information storage network element send first insert After entering subscription data message, also include:

First core network element receives the second insertion subscription data of the second CAMEL-Subscription-Information storage network element transmission and disappears Breath；

First core network element inserts the label in second system of the UE in subscription data message according to second About information, updates the UE of storage CAMEL-Subscription-Information in second system in the first core network element；

First core network element sends the second insertion subscription data response to the second CAMEL-Subscription-Information storage network element and disappears Breath.

Specifically, the CAMEL-Subscription-Information in second system of the UE in the second CAMEL-Subscription-Information stores network element When changing, the second CAMEL-Subscription-Information storage network element is by sending the second insertion subscription data message informing the One core network element, after the first core network element receives this message, updates the UE of this locality preservation second CAMEL-Subscription-Information in system.

The flow chart of the inter-system switching method embodiment two that Fig. 3 provides for the present invention, as it is shown on figure 3, The inter-system switching method of the present embodiment includes:

S201, the second CAMEL-Subscription-Information storage network element receive what the first core network element in the first system sent Location update request message, the second CAMEL-Subscription-Information storage network element is storage UE CAMEL-Subscription-Information in second system Network element；

S202, the second CAMEL-Subscription-Information storage network element send the first insertion subscription data to the first core network element Message, comprises UE CAMEL-Subscription-Information in second system in the first insertion subscription data message, so that the One core network element the second core network element in second system sends forward direction RELOCATION REQUEST message, front Comprising Context identifier in RELOCATION REQUEST message, the value of Context identifier is that UE is in second system CAMEL-Subscription-Information in the value of Context identifier.

Specifically, the second core network element sends forward direction RELOCATION REQUEST message and receives the first core net After the forward direction RELOCATION REQUEST message that network element sends, according to the context mark in forward direction RELOCATION REQUEST message Know and determine the CAMEL-Subscription-Information corresponding with Context identifier.

The inter-system switching method that the present embodiment provides, receives first by the second CAMEL-Subscription-Information storage network element The location update request message that the first core network element in system sends, then send out to the first core network element Send the first insertion subscription data message, so that the second core net that the first core network element is in second system Network element sends forward direction RELOCATION REQUEST message, comprises Context identifier in forward direction RELOCATION REQUEST message, on The value hereafter identified is the value of the Context identifier in UE CAMEL-Subscription-Information in second system, Ke Yishi When existing UE switches between the first system and second system, the core network element of second system accurately obtains The APN CAMEL-Subscription-Information in second system used to UE, and then improve UE at the first system and the The success rate of switching between two system.

Further, after S202, also include:

Second CAMEL-Subscription-Information storage network element receives the first insertion subscription data of the first core network element transmission should Answer message；

Second CAMEL-Subscription-Information storage network element sends position update response information to the first core network element.

Further, after S202, also include:

Second CAMEL-Subscription-Information storage network element sends the second insertion subscription data message to the first core network element, So that the first core network element inserts the label in second system of the UE in subscription data message according to second About information, updates the UE of storage CAMEL-Subscription-Information in second system in the first core network element；

Second CAMEL-Subscription-Information storage network element receives the second insertion subscription data of the first core network element transmission should Answer message.

Further, after S201, also include:

Second CAMEL-Subscription-Information storage network element to the 3rd core network element send canceling position registration message, the 3rd Core network element be in second system UE adhered to, core net net in addition to the second core network element Unit, so that the 3rd core network element deletes the contextual information of locally stored UE；

Second CAMEL-Subscription-Information storage network element receives the canceling position registration reply of the 3rd core network element transmission and disappears Breath.

The flow chart of the inter-system switching method embodiment three that Fig. 4 provides for the present invention, as shown in Figure 4, The inter-system switching method of the present embodiment includes:

The second core network element in S301, second system receives the first core network element in the first system The forward direction RELOCATION REQUEST message sent, comprises Context identifier in forward direction RELOCATION REQUEST message, up and down The value that value is the Context identifier in UE CAMEL-Subscription-Information in second system of literary composition mark.

Based on context S302, the second core network element identify and determine the signing letter corresponding with Context identifier Breath.

The inter-system switching method that the present embodiment provides, is connect by the second core network element in second system Receiving the forward direction RELOCATION REQUEST message that the first core network element in the first system sends, forward direction reorientation please Asking and comprise Context identifier in message, the value of Context identifier is UE CAMEL-Subscription-Information in second system In the value of Context identifier, determine the CAMEL-Subscription-Information corresponding with Context identifier further according to Context identifier, Can realize UE when switching between the first system and second system, the core network element of second system is accurate Really get the APN CAMEL-Subscription-Information in second system that UE uses, and then improve UE and first be The success rate of switching between system and second system.

When below UE being switched between the first system and second system, the first core network element, second As a example by interaction between CAMEL-Subscription-Information storage network element and the second core network element, the system to the present invention Method for switching between is described in detail.

The flow chart of the inter-system switching method embodiment four that Fig. 5 provides for the present invention, as it is shown in figure 5, The inter-system switching method of the present embodiment switches to 2/3G, the first core network element at UE with UE from 4G After accessing the first core network element by attachment flow, obtain UE CAMEL-Subscription-Information in second system As a example by illustrate, including:

S401-S405 is that UE is attached to through flow processs such as safety, location updating, default bearer establishments LTE-EPS network, this process is defined in 3GPP23401 agreement, the most no longer describes in detail.

S406, after standard attachment flow terminates, MME(pass through Gr+ interface) to HLR send position Put more newly requested (Update Location Request) message.

If S407 HLR being also recorded for other SGSN information that this user once adhered to, then The HLR SGSN to old side sends canceling position registration (Cancel Location) message.

S408, old side SGSN delete the contextual information of this user of local cache, reply to HLR and take Registration reply (Cancel Location Ack) message is put in digit absorption.

S409, HLR are by inserting subscription data (Insert Subscriber Data) message by the 2/3G of user CAMEL-Subscription-Information is sent to MME.

S410, MME this locality preserves the 2/3G CAMEL-Subscription-Information of user, and returns insertion signing number to HLR According to response (Insert Subscriber Data Ack) message.

S411, HLR update response (Update Location Ack) message to MME home position.

S412, HLR send and insert subscription data (Insert Subscriber Data) message to MME.

S413, MME update the 2/3G CAMEL-Subscription-Information that this locality preserves, and return insertion signing number to HLR According to response (Insert Subscriber Data Ack) message.

When UE is switched to 2/3G from 4G, MME is by " Forward Relocation Request " Context Identifier value from the subscription data of 2/3G in message.Other process same 3GPP The definition of 23401.

Specifically, it is switched to the embodiment scene of 2/3G (due to for this from 4G network at UE Invention, no matter 2G or 3G wireless access, the process of core network element is identical, therefore to 2G without Line accesses not to be made to launch).UE carried out business at LTE network (4G) area of coverage originally, by switching Process is switched to UMTS network (2/3G) area of coverage and carries out business.

The inter-system switching method that the present embodiment provides, by the first core network element at UE by attachment After flow process accesses the first core network element, obtain UE CAMEL-Subscription-Information in second system, then to the The second core network element in two system sends forward direction RELOCATION REQUEST message, forward direction RELOCATION REQUEST message In comprise Context identifier, the value of Context identifier is upper in UE CAMEL-Subscription-Information in second system The value hereafter identified so that the second core network element based on context identify determine corresponding with Context identifier CAMEL-Subscription-Information, it is possible to achieve when UE switches between the first system and second system, second system Core network element is accurately obtained the APN of UE use CAMEL-Subscription-Information in second system, and then improves The success rate that UE switches between the first system and second system.

The flow chart of the inter-system switching method embodiment five that Fig. 6 provides for the present invention, as shown in Figure 6, The inter-system switching method of the present embodiment switches to 2/3G, the first core network element at UE with UE from 4G After accessing the first core network element by TAU flow process, obtain UE CAMEL-Subscription-Information in second system As a example by illustrate, including:

S501-S506 is that UE is linked into the flow process of EPS network, TAU flow definition through TAU flow process In 3GPP23401 agreement, the most no longer describe in detail.

S507, MME are after UE returns TAU Accept message, and (by Gr+ interface) is to HLR Send Update Location Request message.

S508, HLR pass through " Insert Subscriber Data " message by the 2/3G CAMEL-Subscription-Information of user It is sent to MME.

S509, MME this locality preserves the 2/3G CAMEL-Subscription-Information of user, and returns " Insert to HLR Subscriber Data Ack " message.

S510, HLR return " Update Location Ack " message to MME.

It is understood that in the present embodiment, when the 2/3G CAMEL-Subscription-Information in HLR changes, HLR passes through " Insert Subscriber Data " message informing MME；After MME receives this message, more The new local 2/3G CAMEL-Subscription-Information preserved, and return " Insert Subscriber Data Ack " to HLR Message.

When UE is switched to 2/3G from 4G, " Forward Relocation Request " is disappeared by MME Context Identifier value from the subscription data of 2/3G in breath.Other process same 3GPP23401 Definition.

The inter-system switching method that the present embodiment provides, passes through TAU by the first core network element at UE After flow process accesses the first core network element, obtain UE CAMEL-Subscription-Information in second system, then to the The second core network element in two system sends forward direction RELOCATION REQUEST message, forward direction RELOCATION REQUEST message In comprise Context identifier, the value of Context identifier is upper in UE CAMEL-Subscription-Information in second system The value hereafter identified so that the second core network element based on context identify determine corresponding with Context identifier CAMEL-Subscription-Information, it is possible to achieve when UE switches between the first system and second system, second system Core network element is accurately obtained the APN of UE use CAMEL-Subscription-Information in second system, and then improves The success rate that UE switches between the first system and second system.

The flow chart of the inter-system switching method embodiment six that Fig. 7 provides for the present invention, as it is shown in fig. 7, The inter-system switching method of the present embodiment switches to 4G, the first core network element at UE with UE from 2/3G After accessing the first core network element by attachment flow, obtain UE CAMEL-Subscription-Information in second system As a example by illustrate, including:

S601-S604 is that UE is attached to GPRS through flow processs such as safety, location updating, default bearer establishments Network, this process is defined in 3GPP23060 agreement, the most no longer describes in detail.

S605, SGSN after UE receives Attach Complete message, (by S6d interface) to HSS sends Update Location Request message (this message defines) at 3GPP29272.

If being also recorded for the MME information of this user in S606 HSS, then the MME to old side sends out Send a Cancel Location message.

S607, old side MME reply Cancel Location Ack message to HSS.

The 4G CAMEL-Subscription-Information of user is sent out by S608, HSS by " Insert Subscriber Data " message Give SGSN.

S609, SGSN this locality preserves the 4G CAMEL-Subscription-Information of user, and returns " Insert to HSS Subscriber Data Ack " message.

S610, HSS return " Update Location Ack " message to SGSN.

S611, HSS send and insert subscription data (Insert Subscriber Data) message to SGSN.

S612, SGSN update the 4G CAMEL-Subscription-Information that this locality preserves, and return insertion signing number to HSS According to response (Insert Subscriber Data Ack) message.

When UE is switched to 4G from 2/3G, " Forward Relocation Request " is disappeared by SGSN Context Identifier value from the subscription data of 4G in breath.Other process same 3GPP23401 Definition.

The flow chart of the inter-system switching method embodiment seven that Fig. 8 provides for the present invention, as shown in Figure 8, The inter-system switching method of the present embodiment switches to 4G, the first core network element at UE with UE from 2/3G After accessing the first core network element by RAU flow process, obtain UE CAMEL-Subscription-Information in second system As a example by illustrate, including:

S701-S706 is that UE is linked into GPRS network through RAU flow process, and RAU flow definition exists In 3GPP23060 agreement, the most no longer describe in detail.

S707, SGSN are after UE returns RAU Accept message, and (by S6d interface) is to HSS Send Update Location Request message (this message defines) at 3GPP29272.

The 4G CAMEL-Subscription-Information of user is sent to by S708, HSS by " Insert Subscriber Data " SGSN。

S709, SGSN this locality preserves the 4G CAMEL-Subscription-Information of user, and returns " Insert to HSS Subscriber Data Ack”。

S710, HSS return " Update Location Ack " to SGSN.

It is understood that in the present embodiment, when the 4G CAMEL-Subscription-Information in HSS changes, HSS By " Insert Subscriber Data " message informing SGSN；After SGSN receives this message, update this The 4G CAMEL-Subscription-Information that ground preserves, and return " Insert Subscriber Data Ack " message to HSS.

The inter-system switching method that the present embodiment provides, passes through RAU by the first core network element at UE After flow process accesses the first core network element, obtain UE CAMEL-Subscription-Information in second system, then to the The second core network element in two system sends forward direction RELOCATION REQUEST message, forward direction RELOCATION REQUEST message In comprise Context identifier, the value of Context identifier is upper in UE CAMEL-Subscription-Information in second system The value hereafter identified so that the second core network element based on context identify determine corresponding with Context identifier CAMEL-Subscription-Information, it is possible to achieve when UE switches between the first system and second system, second system Core network element is accurately obtained the APN of UE use CAMEL-Subscription-Information in second system, and then improves The success rate that UE switches between the first system and second system.

The structural representation of the intersystem handover device embodiment one that Fig. 9 provides for the present invention, such as Fig. 9 institute Show, the intersystem handover device of the present embodiment, can be the first core network element, including: acquisition module 91 and sending module 92, wherein, acquisition module 91 is for obtaining UE signing letter in second system Breath；Sending module 92 sends forward direction re-positioning request for the second core network element in second system and disappears Breath, comprises Context identifier in forward direction RELOCATION REQUEST message, the value of Context identifier is that UE is second The value of the Context identifier in CAMEL-Subscription-Information in system, based on context marks for the second core network element Know and determine the CAMEL-Subscription-Information corresponding with Context identifier.

The device of the present embodiment, may be used for performing the technical scheme of embodiment of the method shown in Fig. 1, in fact Existing principle is similar with technique effect, and here is omitted.

Further, acquisition module 91 specifically for:

Location update request message, the second CAMEL-Subscription-Information storage net is sent to the second CAMEL-Subscription-Information storage network element Unit is the network element storing UE CAMEL-Subscription-Information in second system；

Receiving the first insertion subscription data message that the second CAMEL-Subscription-Information storage network element sends, first inserts label Data-message about comprises UE CAMEL-Subscription-Information in second system.

Further, acquisition module 91 is additionally operable to receiving the insertion that the second CAMEL-Subscription-Information storage network element sends After subscription data message, send the first insertion subscription data response to the second CAMEL-Subscription-Information storage network element and disappear Breath；

Receive the position update response information that the second CAMEL-Subscription-Information storage network element sends.

Further, acquisition module 91 is additionally operable to receiving the first of the second CAMEL-Subscription-Information storage network element transmission After inserting subscription data message, receive the second insertion signing number that the second CAMEL-Subscription-Information storage network element sends According to message；

Insert the CAMEL-Subscription-Information in second system of the UE in subscription data message according to second, update the The UE of storage CAMEL-Subscription-Information in second system in one core network element；

The second insertion subscription data response message is sent to the second CAMEL-Subscription-Information storage network element.

The device of the present embodiment, may be used for performing in embodiment of the method shown in Fig. 1, Fig. 5-Fig. 8 first The technical scheme that core network element performs, it is similar with technique effect that it realizes principle, and here is omitted.

The structural representation of the intersystem handover device embodiment two that Figure 10 provides for the present invention, such as Figure 10 Shown in, the intersystem handover device of the present embodiment, can be the first core network element, including emitter 11, Receptor 12, memorizer 13 and be connected with emitter 11, receptor 12 and memorizer 13 respectively Processor 14.Certainly, intersystem handover device can also include antenna, baseband process component, middle radio frequency The universal component such as processing component, input/output unit, the embodiment of the present invention is the most any restriction at this.

Wherein, memorizer 13 stores batch processing code, and processor 14 is used for calling memorizer 13 The program code of middle storage, is used for performing following operation:

Obtain UE CAMEL-Subscription-Information in second system；

The second core network element in second system sends forward direction RELOCATION REQUEST message, forward direction reorientation Comprising Context identifier in request message, the value of Context identifier is UE signing letter in second system The value of the Context identifier in breath, based on context identifies for the second core network element and determines and context The CAMEL-Subscription-Information that mark is corresponding.

The device of the present embodiment, may be used for performing in embodiment of the method shown in Fig. 1 or Fig. 5-Fig. 8 first The technical scheme that core network element performs, it is similar with technique effect that it realizes principle, and here is omitted.

The structural representation of the intersystem handover device embodiment three that Figure 11 provides for the present invention, such as Figure 11 Shown in, the intersystem handover device of the present embodiment, can be the second CAMEL-Subscription-Information storage network element, including: Receiver module 111 and sending module 112, wherein, receiver module 111 is for receiving in the first system The location update request message that first core network element sends, the second CAMEL-Subscription-Information storage network element is second to be System stores the network element of UE CAMEL-Subscription-Information；Sending module 112 is for sending the to the first core network element One inserts subscription data message, comprises UE label in second system in the first insertion subscription data message About information, resets so that the second core network element that the first core network element is in second system sends forward direction Position request message, comprises Context identifier in forward direction RELOCATION REQUEST message, the value of Context identifier is UE The value of the Context identifier in CAMEL-Subscription-Information in second system.

The device of the present embodiment, may be used for performing the technical scheme of embodiment of the method shown in Fig. 3, in fact Existing principle is similar with technique effect, and here is omitted.

Further, receiver module 111 is additionally operable to sending the first insertion signing to the first core network element After data-message, receive the first insertion subscription data response message that the first core network element sends；

Sending module 112 is additionally operable to send position update response information to the first core network element.

Further, sending module 112 is additionally operable to store network element to the first core net at the second CAMEL-Subscription-Information After network element sends the first insertion subscription data message, send the second insertion signing to the first core network element Data-message, so that the first core network element inserts the UE in subscription data message second according to second CAMEL-Subscription-Information in system, updates the UE of storage signing in second system in the first core network element Information；

Receiver module 111 is additionally operable to receive the second insertion subscription data response that the first core network element sends Message.

Further, sending module 112 is additionally operable to receiving the location updating that the first core network element sends After request message, send canceling position registration message, the 3rd core network element to the 3rd core network element Core network element that adhered to for UE in second system, in addition to the second core network element, so that the Three core network elements delete the contextual information of locally stored UE；

Receiver module 111 is additionally operable to receive the canceling position registration reply of the 3rd core network element transmission and disappears Breath.

The device of the present embodiment, may be used for performing in embodiment of the method shown in Fig. 3, Fig. 5-Fig. 8 second The technical scheme that CAMEL-Subscription-Information storage network element performs, it is similar with technique effect that it realizes principle, the most no longer Repeat.

The structural representation of the intersystem handover device embodiment four that Figure 12 provides for the present invention, such as Figure 12 Shown in, the intersystem handover device of the present embodiment, can be the second CAMEL-Subscription-Information storage network element, including sending out Emitter 121, receptor 122, memorizer 123 and respectively with emitter 121, receptor 122 and deposit The processor 124 that reservoir 123 connects.Certainly, intersystem handover device can also include antenna, base band The universal components such as processing component, middle radio frequency processing parts, input/output unit, the embodiment of the present invention is at this The most any restriction.

Wherein, memorizer 123 stores batch processing code, and processor 124 is used for calling memorizer The program code of storage in 13, is used for performing following operation:

Receive the location update request message that the first core network element in the first system sends, the second signing Information storage network element is the network element storing user equipment (UE) CAMEL-Subscription-Information in second system；

Sending the first insertion subscription data message to the first core network element, first inserts subscription data message In comprise UE CAMEL-Subscription-Information in second system, so that the first core network element is in second system Second core network element sends forward direction RELOCATION REQUEST message, comprises up and down in forward direction RELOCATION REQUEST message Literary composition mark, the value of Context identifier is the Context identifier in UE CAMEL-Subscription-Information in second system Value.

The structural representation of the intersystem handover device embodiment five that Figure 13 provides for the present invention, such as Figure 12 Shown in, the intersystem handover device of the present embodiment, can be the second core network element, including: receive mould Block 131 and processing module 132, wherein, receiver module 131 is for receiving the first core in the first system The forward direction RELOCATION REQUEST message that heart network element sends, comprises context mark in forward direction RELOCATION REQUEST message Knowing, the value of Context identifier is the value of the Context identifier in UE CAMEL-Subscription-Information in second system； Processing module 132 determines the CAMEL-Subscription-Information corresponding with Context identifier for based on context mark.

The device of the present embodiment, may be used for performing the technical scheme of embodiment of the method shown in Fig. 4, in fact Existing principle is similar with technique effect, and here is omitted.

The structural representation of the intersystem handover device embodiment six that Figure 14 provides for the present invention, such as Figure 14 Shown in, the intersystem handover device of the present embodiment, can be the second core network element, including emitter 141, Receptor 142, memorizer 143 and respectively with emitter 141, receptor 142 and memorizer 143 even The processor 144 connect.Certainly, intersystem handover device can also include antenna, baseband process component, The universal components such as middle radio frequency processing parts, input/output unit, the embodiment of the present invention is the most any limit at this System.

Wherein, memorizer 143 stores batch processing code, and processor 144 is used for calling memorizer The program code of storage in 13, is used for performing following operation:

Receive the forward direction RELOCATION REQUEST message that the first core network element in the first system sends, forward direction weight Comprising Context identifier in locating request message, the value of Context identifier is that user equipment (UE) is second The value of the Context identifier in CAMEL-Subscription-Information in system；

Based on context mark determines the CAMEL-Subscription-Information corresponding with Context identifier.

The device of the present embodiment, may be used for performing in embodiment of the method shown in Fig. 4, Fig. 5-Fig. 8 second The technical scheme that core network element performs, it is similar with technique effect that it realizes principle, and here is omitted.

The structural representation of the network system embodiment one that Figure 15 provides for the present invention, as shown in figure 15, The network system of the present embodiment, may include that the network system of the present embodiment may include that Fig. 9 or figure Any one first core network element 100, Figure 11 or embodiment illustrated in fig. 12 in 10 illustrated embodiments In any one second CAMEL-Subscription-Information storage network element 200 and Figure 13 or embodiment illustrated in fig. 14 in Any one second core network element 300.

It should be noted that the structural representation only one signal that the various embodiments described above are corresponding, each several part Or the annexation of module is not limited to the form shown in figure, the situation in can applying with reality is as the criterion.

In several embodiments provided by the present invention, it should be understood that disclosed apparatus and method, Can realize by another way.Such as, device embodiment described above is only schematically, Such as, the division of described unit, it is only a kind of logic function and divides, actual can have additionally when realizing Dividing mode, the most multiple unit or assembly can in conjunction with or be desirably integrated into another system, or Some features can be ignored, or does not performs.Another point, shown or discussed coupling each other or Direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, device or unit or communication link Connect, can be electrical, machinery or other form.

The described unit illustrated as separating component can be or may not be physically separate, makees The parts shown for unit can be or may not be physical location, i.e. may be located at a place, Or can also be distributed on multiple NE.Can select according to the actual needs part therein or The whole unit of person realizes the purpose of the present embodiment scheme.

It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, Can also be that unit is individually physically present, it is also possible to two or more unit are integrated in a list In unit.Above-mentioned integrated unit both can realize to use the form of hardware, it would however also be possible to employ hardware adds software The form of functional unit realizes.

The above-mentioned integrated unit realized with the form of SFU software functional unit, can be stored in a computer In read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, including some fingers Make with so that a computer equipment (can be personal computer, server, or the network equipment etc.) Or processor (processor) performs the part steps of method described in each embodiment of the present invention.And it is aforementioned Storage medium include: USB flash disk, portable hard drive, read only memory (Read-Only Memory, ROM), Random access memory (Random Access Memory, RAM), magnetic disc or CD etc. are various can To store the medium of program code.

Those skilled in the art are it can be understood that arrive, for convenience and simplicity of description, only with above-mentioned respectively The division of functional module is illustrated, and in actual application, can above-mentioned functions be divided as desired Join and completed by different functional modules, the internal structure of device will be divided into different functional modules, with Complete all or part of function described above.The specific works process of the device of foregoing description is permissible With reference to the corresponding process in preceding method embodiment, do not repeat them here.

Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than right It limits；Although the present invention being described in detail with reference to foregoing embodiments, this area common Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it, Or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, and The essence not making appropriate technical solution departs from the scope of various embodiments of the present invention technical scheme.

Claims

1. an inter-system switching method, it is characterised in that including:

Described first core network element the second core network element in described second system sends forward direction and resets Position request message, comprises Context identifier, described Context identifier in described forward direction RELOCATION REQUEST message The value that value is the Context identifier in described UE CAMEL-Subscription-Information in described second system, for institute State the second core network element and determine the signing letter corresponding with described Context identifier according to described Context identifier Breath；

The first core network element in described the first system obtains user equipment (UE) label in second system About information, including:

Described first core network element receives the first insertion label that described second CAMEL-Subscription-Information storage network element sends About data-message, comprises described UE in described second system in described first insertion subscription data message CAMEL-Subscription-Information；

Described first core network element receives the first insertion label that described second CAMEL-Subscription-Information storage network element sends About after data-message, also include:

Method the most according to claim 1, it is characterised in that described first core network element receives After the insertion subscription data message that described second CAMEL-Subscription-Information storage network element sends, also include:

Method the most according to claim 1 and 2, it is characterised in that described the first system is 2G System or 3G system, described second system is 4G system；Or, described the first system is 4G system, Described second system is 2G system or 3G system.

4. an inter-system switching method, it is characterised in that including:

Described second CAMEL-Subscription-Information storage network element sends the first insertion signing number to described first core network element According to message, described first inserts the signing letter comprising UE in subscription data message in described second system Breath, so that the second core network element that described first core network element is in described second system sends forward direction RELOCATION REQUEST message, comprises Context identifier, described context in described forward direction RELOCATION REQUEST message The value that value is the Context identifier in described UE CAMEL-Subscription-Information in described second system of mark；

Described second CAMEL-Subscription-Information storage network element sends the first insertion signing number to described first core network element After message, also include:

Method the most according to claim 4, it is characterised in that described second CAMEL-Subscription-Information storage net Unit, after described first core network element sends the first insertion subscription data message, also includes:

6. according to the method described in claim 4 or 5, it is characterised in that described second CAMEL-Subscription-Information is deposited After storage network element receives the location update request message that the first core network element sends, also include:

Method the most according to claim 4, it is characterised in that described the first system is 2G system Or 3G system, described second system is 4G system；Or, described the first system is 4G system, institute Stating second system is 2G system or 3G system.

8. an intersystem handover device, it is characterised in that described intersystem handover device is positioned at first and is In system, described intersystem handover device includes:

Sending module, sending forward direction reorientation for the second core network element in described second system please Seek message, described forward direction RELOCATION REQUEST message comprises Context identifier, the value of described Context identifier For the value of the Context identifier in described UE CAMEL-Subscription-Information in described second system, for described Two core network elements determine the CAMEL-Subscription-Information corresponding with described Context identifier according to described Context identifier； Described acquisition module, specifically for:

Receive the first insertion subscription data message that described second CAMEL-Subscription-Information storage network element sends, described the One insertion subscription data message comprises described UE CAMEL-Subscription-Information in described second system；

Described acquisition module, is additionally operable to receive that described second CAMEL-Subscription-Information storage network element sends described the After one inserts subscription data message, receive the second insertion that described second CAMEL-Subscription-Information storage network element sends Subscription data message；

The signing in described second system of the described UE in subscription data message is inserted according to described second Information, updates the described UE of storage CAMEL-Subscription-Information in described second system in the first core network element；

Device the most according to claim 8, it is characterised in that described acquisition module, is additionally operable to After receiving the insertion subscription data message that described second CAMEL-Subscription-Information storage network element sends, to described second CAMEL-Subscription-Information storage network element sends the first insertion subscription data response message；

Device the most according to claim 8 or claim 9, it is characterised in that described the first system is 2G System or 3G system, described second system is 4G system；Or, described the first system is 4G system, Described second system is 2G system or 3G system.

11. 1 kinds of intersystem handover devices, it is characterised in that including:

Receiver module, for receiving the position updating request that the first core network element in the first system sends Message, the second CAMEL-Subscription-Information storage network element is the net storing user equipment (UE) CAMEL-Subscription-Information in second system Unit；

Sending module, for sending the first insertion subscription data message, institute to described first core network element State in the first insertion subscription data message and comprise UE CAMEL-Subscription-Information in described second system, so that institute State first core network element the second core network element in described second system and send forward direction re-positioning request Message, comprises Context identifier in described forward direction RELOCATION REQUEST message, the value of described Context identifier is The value of the Context identifier in described UE CAMEL-Subscription-Information in described second system；

Described sending module, is additionally operable at described second CAMEL-Subscription-Information storage network element to described first core net After network element sends the first insertion subscription data message, send the second insertion to described first core network element Subscription data message, so that described first core network element inserts in subscription data message according to described second Described UE CAMEL-Subscription-Information in described second system, update in described first core network element and store Described UE CAMEL-Subscription-Information in described second system；

12. devices according to claim 11, it is characterised in that described receiver module, are additionally operable to After sending the first insertion subscription data message to described first core network element, receive described first core The first insertion subscription data response message that heart network element sends；

13. according to claim 11 or 12 described devices, it is characterised in that described sending module, It is additionally operable to after receiving the location update request message that the first core network element sends, to the 3rd core net Network element sends canceling position registration message, and described 3rd core network element is UE described in described second system Core network element that adhered to, in addition to described second core network element, so that described 3rd core net Network element deletes the contextual information of locally stored described UE；

14. devices according to claim 11, it is characterised in that described the first system is 2G system System or 3G system, described second system is 4G system；Or, described the first system is 4G system, Described second system is 2G system or 3G system.

15. 1 kinds of network systems, it is characterised in that including: as described in claim 8-10 any one Intersystem handover device, intersystem handover device as described in claim 11-14 any one.