CN103338489A

CN103338489A - System switching method, system switching device and network system

Info

Publication number: CN103338489A
Application number: CN2013102617815A
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: 2013-10-02
Anticipated expiration: 2033-06-27
Also published as: WO2014206251A1; CN103338489B

Abstract

The embodiment of the invention provides a system switching method, a system switching device and a network system. The method comprises the steps as follows: the first core network element in a first system acquires the subscription information of user equipment (UE) in a second system; the first core network element sends a forward relocation request message to the second core network element in the second system, wherein the forward relocation request message contains a context identifier, and the value of the context identifier is that of a context identifier in the subscription information of the UE in the second system so that the second core network element can determine the subscription information corresponding to the context identifier according to the context identifier. The technical scheme provided by the invention can improve the success rate of switching between the first system and the second system.

Description

Inter-system switching method, device and network system

Technical field

The embodiment of the invention relates to the communication technology, relates in particular to a kind of inter-system switching method, device and network system.

Background technology

At Long Term Evolution (Long Term Evolution, abbreviation LTE) before the technology maturation, a large amount of GPRSs (General Packet Radio Service has been disposed in the whole world, be called for short GPRS) network, this network comprises GSM EDGE Radio Access Network (GSM/EDGE Radio Access Network, be called for short GERAN), GERAN uses global system for mobile communications (Global System of Mobile communication, be called for short GSM) access technology (being 2G), UMTS Terrestrial radio access network (Universal Terrestrial Radio Access Network, be called for short UTRAN) wireless network, UTRAN uses universal mobile telecommunications system (Universal Mobile Telecommunications System is called for short UMTS) access technology (being 3G) and GPRS core net.The introducing of LTE-EPS network is a process of carrying out gradually, this network comprises UMTS Terrestrial radio access network (the Evolved Universal Terrestrial Radio Access Network of evolution, be called for short E-UTRAN) wireless network (use LTE access technology, be 4G) and evolved packet system (Evolved Packet System is called for short EPS) core net.Operator can't accomplish in one move and set up pure, an isolated EPS network.So 2/3G and 4G network will exist in for a long time simultaneously.Correspondingly, the switching of terminal use between 2/3G and 4G network will become frequent.

With UMTS(3G) and LTE(4G) coexistence situation under, UE carries out business at the LTE network, when the covering (signal) of UMTS network is better than the LTE network, perhaps (the evolved Node B in the base station, be called for short eNodeB) under the situation such as load is heavier, after perhaps UE moved to the UMTS overlay area from the LTE overlay area, eNodeB can trigger UE and switch to the UMTS network.

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

Summary of the invention

The embodiment of the invention provides a kind of inter-system switching method, device and network system, when realizing that UE switches between first system and second system, the core network element of second system accurately gets access to the CAMEL-Subscription-Information of APN in second system that UE uses, and then improves UE success rate for switching between first system and second system.

First aspect present invention provides a kind of inter-system switching method, comprising:

First core network element in first system obtains the CAMEL-Subscription-Information of user equipment (UE) in second system;

Described first core network element sends the forward direction RELOCATION REQUEST message to second core network element in described second system, comprise Context identifier in the described forward direction RELOCATION REQUEST message, the value of described Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of described UE in described second system, determines the CAMEL-Subscription-Information corresponding with described Context identifier for described second core network element according to described Context identifier.

In first kind of first aspect possible implementation, first core network element in described first system obtains the CAMEL-Subscription-Information of user equipment (UE) in second system, comprising:

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

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

According to first kind of first aspect possible implementation, in second kind of first aspect possible implementation,

Described first core network element receives after the insertion subscription data message of described second CAMEL-Subscription-Information storage network element transmission, also comprises:

Described first core network element sends first to described second CAMEL-Subscription-Information storage network element and inserts the subscription data response message;

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

First kind or second kind of possible implementation in conjunction with first aspect or first aspect, in the third possible implementation of first aspect, described first core network element receives first of described second CAMEL-Subscription-Information storage network element transmission and inserts after the subscription data message, also comprises:

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

Described first core network element upgrades the CAMEL-Subscription-Information of described UE in described second system of storing in described first core network element according to described second CAMEL-Subscription-Information of described UE in described second system that inserts in the subscription data message;

Described first core network element sends second to described second CAMEL-Subscription-Information storage network element and inserts the subscription data response message.

To the third possible implementation, in the 4th kind of possible implementation of first aspect, described first system is 2G system or 3G system in conjunction with first aspect or first aspect first kind, and described second system is the 4G system; Perhaps, described first system is the 4G system, and described second system is 2G system or 3G system.

Second aspect present invention provides a kind of inter-system switching method, comprising:

Second CAMEL-Subscription-Information storage network element receives the location update request message that first core network element in first system sends, and described second CAMEL-Subscription-Information storage network element is the network element of storage user equipment (UE) CAMEL-Subscription-Information in second system;

Described second CAMEL-Subscription-Information storage network element sends first to described first core network element and inserts subscription data message, comprise the CAMEL-Subscription-Information of UE in described second system in the described first insertion subscription data message, so that described first core network element sends the forward direction RELOCATION REQUEST message to second core network element in described second system, comprise Context identifier in the described forward direction RELOCATION REQUEST message, the value of described Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of described UE in described second system.

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

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

Described second CAMEL-Subscription-Information storage network element sends position update response information to described first core network element.

In conjunction with in first kind of second aspect or the second aspect possible implementation any one, in second kind of second aspect possible implementation, described second CAMEL-Subscription-Information storage network element also comprises after described first core network element sends the first insertion subscription data message:

Described second CAMEL-Subscription-Information storage network element sends second to described first core network element and inserts subscription data message, so that described first core network element upgrades the CAMEL-Subscription-Information of described UE in described second system of storing in described first core network element according to described second CAMEL-Subscription-Information of described UE in described second system that inserts in the subscription data message;

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

In conjunction with in second aspect or second aspect first kind or the second kind of possible implementation any one, in the third possible implementation of second aspect, described second CAMEL-Subscription-Information storage network element receives after the location update request message of first core network element transmission, also comprises:

Described second CAMEL-Subscription-Information storage network element sends the canceling position registration message to the 3rd core network element, that described the 3rd core network element is that UE adhered to described in described second system, the core network element except described second core network element are so that the contextual information of the described UE of the local storage of described the 3rd core network element deletion;

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

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

Third aspect present invention provides a kind of inter-system switching method, comprising:

Second core network element in second system receives the forward direction RELOCATION REQUEST message that first core network element in first system sends, comprise Context identifier in the described forward direction RELOCATION REQUEST message, the value of described Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of user equipment (UE) in described second system;

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

Fourth aspect present invention provides switching device shifter between a kind of system, comprising:

Acquisition module is used for obtaining user equipment (UE) at the CAMEL-Subscription-Information of second system;

Sending module, be used for sending the forward direction RELOCATION REQUEST message to second core network element of described second system, comprise Context identifier in the described forward direction RELOCATION REQUEST message, the value of described Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of described UE in described second system, determines the CAMEL-Subscription-Information corresponding with described Context identifier for described second core network element according to described Context identifier.

In first kind of fourth aspect possible implementation, described acquisition module specifically is used for:

Send location update request message to second CAMEL-Subscription-Information storage network element, described second CAMEL-Subscription-Information storage network element is the network element of storage UE CAMEL-Subscription-Information in second system;

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

According to first kind of fourth aspect possible implementation, in second kind of fourth aspect possible implementation, described acquisition module, also be used for after the insertion subscription data message that receives the transmission of described second CAMEL-Subscription-Information storage network element, send first to described second CAMEL-Subscription-Information storage network element and insert the subscription data response message;

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

First kind or second kind of possible implementation in conjunction with fourth aspect or fourth aspect, in the third possible implementation of fourth aspect, described acquisition module, also be used for after the first insertion subscription data message that described second CAMEL-Subscription-Information storage of reception network element sends, receiving second of described second CAMEL-Subscription-Information storage network element transmission and inserting subscription data message;

According to described second CAMEL-Subscription-Information of described UE in described second system that inserts in the subscription data message, upgrade the CAMEL-Subscription-Information of described UE in described second system of storing in described first core network element;

Send second to described second CAMEL-Subscription-Information storage network element and insert the subscription data response message.

To the third possible implementation, in the 4th kind of possible implementation of fourth aspect, described first system is 2G system or 3G system in conjunction with fourth aspect or fourth aspect first kind, and described second system is the 4G system; Perhaps, described first system is the 4G system, and described second system is 2G system or 3G system.

Fifth aspect present invention provides switching device shifter between a kind of system, comprising:

Receiver module be used for to receive the location update request message that first core network element of first system sends, and described second CAMEL-Subscription-Information storage network element is the network element of storage user equipment (UE) CAMEL-Subscription-Information in second system;

Sending module, be used for sending first to described first core network element and insert subscription data message, comprise the CAMEL-Subscription-Information of UE in described second system in the described first insertion subscription data message, so that described first core network element sends the forward direction RELOCATION REQUEST message to second core network element in described second system, comprise Context identifier in the described forward direction RELOCATION REQUEST message, the value of described Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of described UE in described second system.

In first kind of possible implementation aspect the 5th, described receiver module also is used for send the first insertion subscription data message to described first core network element after, receives the first insertion subscription data response message that described first core network element sends;

Described sending module also is used for sending position update response information to described first core network element.

In conjunction with in first kind of possible implementation of the 5th aspect or the 5th aspect any one, in second kind of possible implementation aspect the 5th, described sending module, also be used for second CAMEL-Subscription-Information storage network element sends the first insertion subscription data message to described first core network element after, send second to described first core network element and insert subscription data message, so that described first core network element upgrades the CAMEL-Subscription-Information of described UE in described second system of storing in described first core network element according to described second CAMEL-Subscription-Information of described UE in described second system that inserts in the subscription data message;

Described receiver module also is used for receiving the second insertion subscription data response message that described first core network element sends.

In conjunction with in the 5th aspect or the 5th aspect first kind or the second kind of possible implementation any one, in the possible implementation of aspect the 5th the third, described sending module, also be used for after the location update request message that receives the transmission of first core network element, send the canceling position registration message to the 3rd core network element, that described the 3rd core network element is that UE adhered to described in described second system, the core network element except described second core network element are so that the contextual information of the described UE of the local storage of described the 3rd core network element deletion;

Described receiver module also is used for receiving the canceling position registration reply message that described the 3rd core network element sends.

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

Sixth aspect present invention provides switching device shifter between a kind of system, comprising:

Receiver module, the forward direction RELOCATION REQUEST message that is used for first core network element transmission of first system that receives, comprise Context identifier in the described forward direction RELOCATION REQUEST message, the value of described Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of user equipment (UE) in second system;

Processing module is used for determining the CAMEL-Subscription-Information corresponding with described Context identifier according to described Context identifier.

Seventh aspect present invention, a kind of network system is provided, comprises: between the system described in any one possible implementation of fourth aspect or fourth aspect between switching device shifter, the system described in any one possible implementation of the 5th aspect or the 5th aspect switching device shifter and as the described system in the 6th aspect between switching device shifter.

The inter-system switching method that the embodiment of the invention provides, device and network system, at first obtain the CAMEL-Subscription-Information of UE in second system by first core network element in first system, first core network element, second core network element in second system again sends the forward direction RELOCATION REQUEST message, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, determine the CAMEL-Subscription-Information corresponding with Context identifier so that based on context second core network element identifies, in the time of can realizing that UE switches between first system and second system, the core network element of second system accurately gets access to the CAMEL-Subscription-Information of APN in second system that UE uses, and then improves UE success rate for switching between first system and second system.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the flow chart of inter-system switching method embodiment one provided by the invention;

Based on context Fig. 2 identifies the schematic diagram of searching the APN CAMEL-Subscription-Information from HLR for SGSN in the prior art;

Fig. 3 is the flow chart of inter-system switching method embodiment two provided by the invention;

Fig. 4 is the flow chart of inter-system switching method embodiment three provided by the invention;

Fig. 5 is the flow chart of inter-system switching method embodiment four provided by the invention;

Fig. 6 is the flow chart of inter-system switching method embodiment five provided by the invention;

Fig. 7 is the flow chart of inter-system switching method embodiment six provided by the invention;

Fig. 8 is the flow chart of inter-system switching method embodiment seven provided by the invention;

Fig. 9 is the structural representation of switching device shifter embodiment one between system provided by the invention;

Figure 10 is the structural representation of switching device shifter embodiment two between system provided by the invention;

Figure 11 is the structural representation of switching device shifter embodiment three between system provided by the invention;

Figure 12 is the structural representation of switching device shifter embodiment four between system provided by the invention;

Figure 13 is the structural representation of switching device shifter embodiment five between system provided by the invention;

Figure 14 is the structural representation of switching device shifter embodiment six between system provided by the invention;

Figure 15 is the structural representation of network system embodiment one provided by the invention.

Embodiment

For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.

Fig. 1 is the flow chart of inter-system switching method embodiment one provided by the invention, and as shown in Figure 1, the inter-system switching method of present embodiment comprises:

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

S102, first core network element send the forward direction RELOCATION REQUEST message to second core network element in second system, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, based on context identifies for second core network element and determines the CAMEL-Subscription-Information corresponding with Context identifier.

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

Specifically, Serving GPRS Support Node (Serving GPRS Support Node, be called for short SGSN) and Mobility Management Entity (Mobility Management Entity, be called for short MME) be respectively to handle packet switching (Packet Switch in GPRS and the EPS network, abbreviation PS) core network element of signaling message, need to prove that the SGSN in the present embodiment refers to that GnGp-SGSN(is the SGSN in the 2/3G system).Attaching position register (Home Location Register, be called for short HLR) be the network element of preserving user signing contract information in the 2/3G network, home subscriber server (Home Subscriber Server is called for short HSS) then is the network element of preserving user signing contract information in the 4G network.

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

The handoff procedure of UE from 4G to 3G can comprise: eNodeB initiates handover request to MME, and MME notice SGSN carries out forward direction reorientation (Forward Relocation Request); SGSN notification target radio network controller (Radio Network Controller is called for short RNC) is set up Radio Resource, and sends relocation response to MME; If do not direct transfer link between eNodeB and the Target RNC, MME needs notification service gateway (Serving Gateway is called for short S-GW) to set up the non-link that direct transfers; MME sends switching command by eNodeB to UE; ENodeB carries out data and transmits: if direct transfer link, eNodeB directly forwards the data to Target RNC; If do not direct transfer link, eNodeB forwards the data to S-GW earlier, forwards the data to Target RNC by S-GW again; UE finishes to switch and send Radio Resource control (Radio Resource Control is called for short RRC) to Target RNC and reshuffles and finish message.After UE finished RRC and reshuffles, Routing Area Identifier (Routing Area Identity is called for short RAI) changed, and needed to carry out 4G to Routing Area Update (Routing Area Update, the abbreviation RAU) flow process of 3G; SGSN notice MME target side has been finished reorientation, and MME response reorientation is finished; SGSN notice GGSN upgrades contextual information; MME notice S-GW deletion session, and notice eNodeB discharges resource.

4G as the SGSN of target side, will obtain mobile management context and packet data protocol (Packet Data Protocol the is called for short PDP) contextual information of UE from source MME in the 2/3G handoff procedure.Wherein PDP Context information has comprised the APN that UE is using (Access Point Name is called for short APN), and APN Context identifier out of Memory such as (Context-Identifier).SGSN gets access to the 2/3G service profile that can obtain this APN behind APN or the APN Context identifier from HLR.

UE switches to GREAN/UTRAN from LTE process has clear and definite definition at 3GPP23401, in the preparatory stage of switching, the MME of source can send to target side SGSN with PDP Context information such as (PDP Context) by " Forward Relocation Request " message.

MME to " the Forward Relocation Request " message definition between SGSN at 3GPP29060, message has been carried PDP Context cell, source MME can be the professional APN that uses of 4G, and PDP Context Identifier is filled in above-mentioned PDP Context cell and brings target side SGSN, after target side SGSN gets access to this APN information, in RAU flow process subsequently, obtain the subscription data of 2/3G from HLR by Update Location Request message.

Prior art in the 3GPP agreement, do not explicitly call for SGSN from HLR inquiry APN CAMEL-Subscription-Information be with APN as index, still with Context Identifier as index, cause each tame manufacturer different when realizing.

When SGSN inquires about the CAMEL-Subscription-Information of APN as index from HLR with Context Identifier, because this Context Identifier obtains from MME, and MME obtains from the HSS inquiry when user 4G inserts, separate with HSS under the scene that realizes at HLR, 2/3G subscription data and 4G subscription data are managed respectively, that is to say for identical APN, HLR and HSS can not guarantee it is identical to the Context Identifier of its distribution.

Based on context Fig. 2 identifies the schematic diagram of searching the APN CAMEL-Subscription-Information from HLR for SGSN in the prior art, as shown in Figure 2, it is a that SGSN obtains the APN value from MME, Context identifier C1 is 1, ask the CAMEL-Subscription-Information of APN a from HLR according to this C1 as SGSN, what reality obtained but is the CAMEL-Subscription-Information of APN b, and this CAMEL-Subscription-Information that just causes SGSN to obtain from HLR is inaccurate.

Be example with 4G to the 2/3G handoff procedure still, present embodiment is worked as 4G user by adhering to or tracing section updating (Tracking Area Update, be called for short TAU) be linked into MME after, MME can be initiated to the position of HSS and upgrade (Update Location) flow process, obtain user's CAMEL-Subscription-Information, and this user's of notice HSS multidate information.MME adheres to or during TAU the user in the present embodiment, except doing the Update Location flow process that once arrives HSS, also to do once the Update Location flow process of HLR to obtain this user's 2/3G CAMEL-Subscription-Information, comprise the Context Identifier of APN.When this 4G user occurs to the 2/3G switching, MME is in sending to the Forward Relocation Request message of SGSN, PDP Context Identifier is filled to value in the 2/3G CAMEL-Subscription-Information, like this, no matter the SGSN of target side is with APN, still Context Identifier can both accurately obtain from the subscription data of HLR inquiry 2/3G.

The inter-system switching method that present embodiment provides, at first obtain the CAMEL-Subscription-Information of UE in second system by first core network element in first system, first core network element, second core network element in second system again sends the forward direction RELOCATION REQUEST message, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, based on context identify definite CAMEL-Subscription-Information corresponding with Context identifier for second core network element, in the time of can realizing that UE switches between first system and second system, the core network element of second system accurately gets access to the CAMEL-Subscription-Information of APN in second system that UE uses, and then improves UE success rate for switching between first system and second system.

Further, S101 can comprise:

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

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

Specifically, first core network element can obtain first and insert the CAMEL-Subscription-Information of UE in second system that comprises in the subscription data message by receiving the first insertion subscription data message that second CAMEL-Subscription-Information storage network element sends.

Further, first core network element receives after the insertion subscription data message of second CAMEL-Subscription-Information storage network element transmission, also comprises:

First core network element sends first to second CAMEL-Subscription-Information storage network element and inserts the subscription data response message;

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

Further, first core network element receives first of second CAMEL-Subscription-Information storage network element transmission and inserts after the subscription data message, also comprises:

First core network element receives the second insertion subscription data message that second CAMEL-Subscription-Information storage network element sends;

First core network element upgrades the CAMEL-Subscription-Information of UE in second system of storing in first core network element according to second CAMEL-Subscription-Information of UE in second system that inserts in the subscription data message;

First core network element sends second to second CAMEL-Subscription-Information storage network element and inserts the subscription data response message.

Specifically, when the CAMEL-Subscription-Information of UE in second system in second CAMEL-Subscription-Information storage network element changes, second CAMEL-Subscription-Information storage network element inserts subscription data message informing first core network element by sending second, after first core network element is received this message, upgrade the local CAMEL-Subscription-Information of UE in second system of preserving.

Fig. 3 is the flow chart of inter-system switching method embodiment two provided by the invention, and as shown in Figure 3, the inter-system switching method of present embodiment comprises:

S201, second CAMEL-Subscription-Information storage network element receive the location update request message that first core network element in first system sends, and second CAMEL-Subscription-Information storage network element is the network element of storage UE CAMEL-Subscription-Information in second system;

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

Specifically, after second core network element transmission forward direction RELOCATION REQUEST message receives the forward direction RELOCATION REQUEST message of first core network element transmission, determine the CAMEL-Subscription-Information corresponding with Context identifier according to the Context identifier in the forward direction RELOCATION REQUEST message.

The inter-system switching method that present embodiment provides, receive the location update request message that first core network element in first system sends by second CAMEL-Subscription-Information storage network element, send first to first core network element again and insert subscription data message, so that first core network element sends the forward direction RELOCATION REQUEST message to second core network element in second system, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, in the time of can realizing that UE switches between first system and second system, the core network element of second system accurately gets access to the CAMEL-Subscription-Information of APN in second system that UE uses, and then improves UE success rate for switching between first system and second system.

Further, after the S202, also comprise:

Second CAMEL-Subscription-Information storage network element receives the first insertion subscription data response message that first core network element sends;

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

Further, after the S202, also comprise:

Second CAMEL-Subscription-Information storage network element sends second to first core network element and inserts subscription data message, so that first core network element upgrades the CAMEL-Subscription-Information of UE in second system of storing in first core network element according to second CAMEL-Subscription-Information of UE in second system that inserts in the subscription data message;

Second CAMEL-Subscription-Information storage network element receives the second insertion subscription data response message that first core network element sends.

Further, after the S201, also comprise:

Second CAMEL-Subscription-Information storage network element sends the canceling position registration message to the 3rd core network element, that the 3rd core network element is that UE adhered in second system, the core network element except second core network element are so that the contextual information of the UE of the local storage of the 3rd core network element deletion;

Second CAMEL-Subscription-Information storage network element receives the canceling position registration reply message that the 3rd core network element sends.

Fig. 4 is the flow chart of inter-system switching method embodiment three provided by the invention, and as shown in Figure 4, the inter-system switching method of present embodiment comprises:

Second core network element in S301, second system receives the forward direction RELOCATION REQUEST message that first core network element in first system sends, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system.

Based on context S302, second core network element identify determines the CAMEL-Subscription-Information corresponding with Context identifier.

The inter-system switching method that present embodiment provides, receive the forward direction RELOCATION REQUEST message that first core network element in first system sends by second core network element in second system, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, based on context sign is determined the CAMEL-Subscription-Information corresponding with Context identifier again, in the time of can realizing that UE switches between first system and second system, the core network element of second system accurately gets access to the CAMEL-Subscription-Information of APN in second system that UE uses, and then improves UE success rate for switching between first system and second system.

Below when UE switched between first system and second system, the reciprocal process between first core network element, second CAMEL-Subscription-Information storage network element and second core network element is example, and inter-system switching method of the present invention is elaborated.

Fig. 5 is the flow chart of inter-system switching method embodiment four provided by the invention, as shown in Figure 5, the inter-system switching method of present embodiment switches to 2/3G, first core network element with UE after UE inserts first core network element by attachment flow from 4G, obtaining the CAMEL-Subscription-Information of UE in second system is that example describes, and comprising:

S401-S405 is that UE is attached to the LTE-EPS network through flow processs such as safety, position renewal, default bearer establishments, and this procedure definition just no longer describes in detail in the 3GPP23401 agreement herein.

S406, after the standard attachment flow finishes, MME(is by the Gr+ interface) send position updating request (Update Location Request) message to HLR.

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

This user's of S408, old side SGSN deletion local cache contextual information is replied canceling position registration reply (Cancel Location Ack) message to HLR.

S409, HLR send to MME by inserting subscription data (Insert Subscriber Data) message with user's 2/3G CAMEL-Subscription-Information.

The local 2/3G CAMEL-Subscription-Information of preserving the user of S410, MME, and return the insertion subscription data to HLR and reply (Insert Subscriber Data Ack) message.

S411, HLR upgrade to the MME home position and reply (Update Location Ack) message.

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

S413, MME upgrade the local 2/3G CAMEL-Subscription-Information of preserving, and return the insertion subscription data to HLR and reply (Insert Subscriber Data Ack) message.

When UE switched to 2/3G from 4G, MME was with the Context Identifier value from the subscription data of 2/3G in " Forward Relocation Request " message.Other handle the definition with 3GPP23401.

Specifically, UE switches to the embodiment scene of 2/3G from the 4G network (because for the present invention, no matter 2G or 3G wireless access, the processing of core network element is identical, so the 2G wireless access is not launched).UE carried out business at LTE network (4G) area of coverage originally, switched to UMTS network (2/3G) area of coverage by handoff procedure and carried out business.

The inter-system switching method that present embodiment provides, by first core network element after UE inserts first core network element by attachment flow, obtain the CAMEL-Subscription-Information of UE in second system, second core network element in second system sends the forward direction RELOCATION REQUEST message again, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, determine the CAMEL-Subscription-Information corresponding with Context identifier so that based on context second core network element identifies, in the time of can realizing that UE switches between first system and second system, the core network element of second system accurately gets access to the CAMEL-Subscription-Information of APN in second system that UE uses, and then improves UE success rate for switching between first system and second system.

Fig. 6 is the flow chart of inter-system switching method embodiment five provided by the invention, as shown in Figure 6, the inter-system switching method of present embodiment switches to 2/3G, first core network element with UE after UE inserts first core network element by the TAU flow process from 4G, obtaining the CAMEL-Subscription-Information of UE in second system is that example describes, and comprising:

S501-S506 is the flow process that UE process TAU flow process is linked into the EPS network, and the TAU flow definition just no longer describes in detail in the 3GPP23401 agreement herein.

After S507, MME returned TAU Accept message to UE, (by the Gr+ interface) sent Update Location Request message to HLR.

S508, HLR send to MME by " Insert Subscriber Data " message with user's 2/3G CAMEL-Subscription-Information.

S509, MME preserve user's 2/3G CAMEL-Subscription-Information in this locality, and return " Insert Subscriber Data Ack " message to HLR.

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

Be understandable that in the present embodiment, when the 2/3G CAMEL-Subscription-Information among the HLR changed, HLR was by " Insert Subscriber Data " message informing MME; After MME receives this message, upgrade the local 2/3G CAMEL-Subscription-Information of preserving, and return " Insert Subscriber Data Ack " message to HLR.

The inter-system switching method that present embodiment provides, by first core network element after UE inserts first core network element by the TAU flow process, obtain the CAMEL-Subscription-Information of UE in second system, second core network element in second system sends the forward direction RELOCATION REQUEST message again, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, determine the CAMEL-Subscription-Information corresponding with Context identifier so that based on context second core network element identifies, in the time of can realizing that UE switches between first system and second system, the core network element of second system accurately gets access to the CAMEL-Subscription-Information of APN in second system that UE uses, and then improves UE success rate for switching between first system and second system.

Fig. 7 is the flow chart of inter-system switching method embodiment six provided by the invention, as shown in Figure 7, the inter-system switching method of present embodiment switches to 4G, first core network element with UE after UE inserts first core network element by attachment flow from 2/3G, obtaining the CAMEL-Subscription-Information of UE in second system is that example describes, and comprising:

S601-S604 is that UE is attached to GPRS network through flow processs such as safety, position renewal, default bearer establishments, and this procedure definition just no longer describes in detail in the 3GPP23060 agreement herein.

After S605, SGSN received Attach Complete message from UE, (by the S6d interface) sent Update Location Request message (this message defines at 3GPP29272) to HSS.

If also recorded this user's MME information among the S606 HSS, then the MME to old side sends a Cancel Location message.

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

S608, HSS send to SGSN by " Insert Subscriber Data " message with user's 4G CAMEL-Subscription-Information.

S609, SGSN preserve user's 4G CAMEL-Subscription-Information in this locality, and return " Insert Subscriber Data Ack " message to HSS.

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

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

S612, SGSN upgrade the local 4G CAMEL-Subscription-Information of preserving, and return the insertion subscription data to HSS and reply (Insert Subscriber Data Ack) message.

When UE switched to 4G from 2/3G, SGSN was with the Context Identifier value from the subscription data of 4G in " Forward Relocation Request " message.Other handle the definition with 3GPP23401.

Fig. 8 is the flow chart of inter-system switching method embodiment seven provided by the invention, as shown in Figure 8, the inter-system switching method of present embodiment switches to 4G, first core network element with UE after UE inserts first core network element by the RAU flow process from 2/3G, obtaining the CAMEL-Subscription-Information of UE in second system is that example describes, and comprising:

S701-S706 is that UE is linked into GPRS network through the RAU flow process, and the RAU flow definition just no longer describes in detail in the 3GPP23060 agreement herein.

After S707, SGSN returned RAU Accept message to UE, (by the S6d interface) sent Update Location Request message (this message defines at 3GPP29272) to HSS.

S708, HSS send to SGSN by " Insert Subscriber Data " with user's 4G CAMEL-Subscription-Information.

S709, SGSN preserve user's 4G CAMEL-Subscription-Information in this locality, and return " Insert Subscriber Data Ack " to HSS.

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

Be understandable that in the present embodiment, when the 4G CAMEL-Subscription-Information among the HSS changed, HSS was by " Insert Subscriber Data " message informing SGSN; After SGSN receives this message, upgrade the local 4G CAMEL-Subscription-Information of preserving, and return " Insert Subscriber Data Ack " message to HSS.

The inter-system switching method that present embodiment provides, by first core network element after UE inserts first core network element by the RAU flow process, obtain the CAMEL-Subscription-Information of UE in second system, second core network element in second system sends the forward direction RELOCATION REQUEST message again, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, determine the CAMEL-Subscription-Information corresponding with Context identifier so that based on context second core network element identifies, in the time of can realizing that UE switches between first system and second system, the core network element of second system accurately gets access to the CAMEL-Subscription-Information of APN in second system that UE uses, and then improves UE success rate for switching between first system and second system.

Fig. 9 is the structural representation of switching device shifter embodiment one between system provided by the invention, as shown in Figure 9, switching device shifter between the system of present embodiment, can be first core network element, comprise: acquisition module 91 and sending module 92, wherein, acquisition module 91 is used for obtaining UE at the CAMEL-Subscription-Information of second system; Sending module 92 is used for sending the forward direction RELOCATION REQUEST message to second core network element of second system, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, based on context identifies for second core network element and determines the CAMEL-Subscription-Information corresponding with Context identifier.

The device of present embodiment can be for the technical scheme of carrying out method embodiment shown in Figure 1, and its realization principle and technique effect are similar, repeat no more herein.

Further, acquisition module 91 specifically is used for:

Send location update request message to second CAMEL-Subscription-Information storage network element, second CAMEL-Subscription-Information storage network element is the network element of storage UE CAMEL-Subscription-Information in second system;

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

Further, acquisition module 91 also is used for sending first to second CAMEL-Subscription-Information storage network element and inserting the subscription data response message after the insertion subscription data message that receives the transmission of second CAMEL-Subscription-Information storage network element;

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

Further, acquisition module 91 also is used for receiving second of second CAMEL-Subscription-Information storage network element transmission and inserting subscription data message after the first insertion subscription data message that reception second CAMEL-Subscription-Information storage network element sends;

According to second CAMEL-Subscription-Information of UE in second system that inserts in the subscription data message, upgrade the CAMEL-Subscription-Information of UE in second system of storing in first core network element;

Send second to second CAMEL-Subscription-Information storage network element and insert the subscription data response message.

The device of present embodiment can be used for the technical scheme that execution graph 1, Fig. 5-method embodiment first core network element shown in Figure 8 is carried out, and it realizes that principle and technique effect are similar, repeats no more herein.

Figure 10 is the structural representation of switching device shifter embodiment two between system provided by the invention, as shown in figure 10, switching device shifter between the system of present embodiment, first core network element be can be, reflector 11, receiver 12, memory 13 and the processor 14 that is connected with reflector 11, receiver 12 and memory 13 respectively comprised.Certainly, switching device shifter can also comprise universal components such as antenna, Base-Band Processing parts, middle radio frequency processing parts, input/output unit between system, and the embodiment of the invention is in this no longer any restriction.

Wherein, storage batch processing code in the memory 13, and processor 14 is used for calling memory 13 stored program code, operation below being used for carrying out:

Obtain the CAMEL-Subscription-Information of UE in second system;

Second core network element in second system sends the forward direction RELOCATION REQUEST message, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system, based on context identifies for second core network element and determines the CAMEL-Subscription-Information corresponding with Context identifier.

The device of present embodiment can be used for the technical scheme that execution graph 1 or Fig. 5-method embodiment first core network element shown in Figure 8 is carried out, and its realization principle and technique effect are similar, repeat no more herein.

Figure 11 is the structural representation of switching device shifter embodiment three between system provided by the invention, as shown in figure 11, switching device shifter between the system of present embodiment, can be second CAMEL-Subscription-Information storage network element, comprise: receiver module 111 and sending module 112, wherein, receiver module 111 is used for the location update request message of first core network element transmission of first system that receives, and second CAMEL-Subscription-Information storage network element is the network element of storage UE CAMEL-Subscription-Information in second system; Sending module 112 is used for sending first to first core network element and inserts subscription data message, comprise the CAMEL-Subscription-Information of UE in second system in the first insertion subscription data message, so that first core network element sends the forward direction RELOCATION REQUEST message to second core network element in second system, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system.

The device of present embodiment can be for the technical scheme of carrying out method embodiment shown in Figure 3, and its realization principle and technique effect are similar, repeat no more herein.

Further, receiver module 111 also is used for send the first insertion subscription data message to first core network element after, receives the first insertion subscription data response message that first core network element sends;

Sending module 112 also is used for sending position update response information to first core network element.

Further, sending module 112 also is used for second CAMEL-Subscription-Information storage network element sends the first insertion subscription data message to first core network element after, send second to first core network element and insert subscription data message, so that first core network element upgrades the CAMEL-Subscription-Information of UE in second system of storing in first core network element according to second CAMEL-Subscription-Information of UE in second system that inserts in the subscription data message;

Receiver module 111 also is used for receiving the second insertion subscription data response message that first core network element sends.

Further, sending module 112 also is used for after the location update request message that receives the transmission of first core network element, send the canceling position registration message to the 3rd core network element, that the 3rd core network element is that UE adhered in second system, the core network element except second core network element are so that the contextual information of the UE of the local storage of the 3rd core network element deletion;

Receiver module 111 also is used for receiving the canceling position registration reply message that the 3rd core network element sends.

The device of present embodiment can be used for the technical scheme that execution graph 3, Fig. 5-method embodiment second CAMEL-Subscription-Information storage network element shown in Figure 8 is carried out, and it realizes that principle and technique effect are similar, repeats no more herein.

Figure 12 is the structural representation of switching device shifter embodiment four between system provided by the invention, as shown in figure 12, switching device shifter between the system of present embodiment, can comprise reflector 121, receiver 122, memory 123 and the processor 124 that is connected with reflector 121, receiver 122 and memory 123 respectively for second CAMEL-Subscription-Information storage network element.Certainly, switching device shifter can also comprise universal components such as antenna, Base-Band Processing parts, middle radio frequency processing parts, input/output unit between system, and the embodiment of the invention is in this no longer any restriction.

Wherein, storage batch processing code in the memory 123, and processor 124 is used for calling memory 13 stored program code, operation below being used for carrying out:

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

Send first to first core network element and insert subscription data message, comprise the CAMEL-Subscription-Information of UE in second system in the first insertion subscription data message, so that first core network element sends the forward direction RELOCATION REQUEST message to second core network element in second system, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system.

Figure 13 is the structural representation of switching device shifter embodiment five between system provided by the invention, as shown in figure 12, switching device shifter between the system of present embodiment, can be second core network element, comprise: receiver module 131 and processing module 132, wherein, receiver module 131 is used for the forward direction RELOCATION REQUEST message of first core network element transmission of first system that receives, comprise Context identifier in the forward direction RELOCATION REQUEST message, the value of Context identifier is the value of the Context identifier in the CAMEL-Subscription-Information of UE in second system; Processing module 132 is used for the based on context definite CAMEL-Subscription-Information corresponding with Context identifier of sign.

The device of present embodiment can be for the technical scheme of carrying out method embodiment shown in Figure 4, and its realization principle and technique effect are similar, repeat no more herein.

Figure 14 is the structural representation of switching device shifter embodiment six between system provided by the invention, as shown in figure 14, switching device shifter between the system of present embodiment, second core network element be can be, reflector 141, receiver 142, memory 143 and the processor 144 that is connected with reflector 141, receiver 142 and memory 143 respectively comprised.Certainly, switching device shifter can also comprise universal components such as antenna, Base-Band Processing parts, middle radio frequency processing parts, input/output unit between system, and the embodiment of the invention is in this no longer any restriction.

Wherein, storage batch processing code in the memory 143, and processor 144 is used for calling memory 13 stored program code, operation below being used for carrying out:

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

Based on context sign is determined the CAMEL-Subscription-Information corresponding with Context identifier.

The device of present embodiment can be used for the technical scheme that execution graph 4, Fig. 5-method embodiment second core network element shown in Figure 8 is carried out, and it realizes that principle and technique effect are similar, repeats no more herein.

Figure 15 is the structural representation of network system embodiment one provided by the invention, as shown in figure 15, the network system of present embodiment can comprise: the network system of present embodiment can comprise: Fig. 9 or embodiment illustrated in fig. 10 in any one first core network element 100, Figure 11 or embodiment illustrated in fig. 12 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.

Need to prove that the structural representation of the various embodiments described above correspondence only is a kind of signal, the annexation of each several part or module is not limited to the form shown in the figure, can be as the criterion with the situation in the practical application.

In several embodiment provided by the present invention, should be understood that disclosed apparatus and method can realize by other mode.For example, device embodiment described above only is schematic, for example, the division of described unit, only be that a kind of logic function is divided, during actual the realization other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, the shown or coupling each other discussed or directly to be coupled or to communicate to connect can be by some interfaces, the indirect coupling of device or unit or communicate to connect can be electrically, machinery or other form.

Described unit as separating component explanation can or can not be physically to separate also, and the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of unit to realize the purpose of present embodiment scheme according to the actual needs.

In addition, each functional unit in each embodiment of the present invention can be integrated in the processing unit, also can be that the independent physics in each unit exists, and also can be integrated in the unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, the form that also can adopt hardware to add SFU software functional unit realizes.

The above-mentioned integrated unit of realizing with the form of SFU software functional unit can be stored in the computer read/write memory medium.Above-mentioned SFU software functional unit is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) or processor (processor) carry out the part steps of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), various media that can be program code stored such as magnetic disc or CD.

Those skilled in the art can be well understood to, be the convenience described and succinct, only the division with above-mentioned each functional module is illustrated, in the practical application, can as required the above-mentioned functions distribution be finished by different functional modules, the internal structure that is about to device is divided into different functional modules, to finish all or part of function described above.The concrete course of work of the device of foregoing description can not repeat them here with reference to the corresponding process among the preceding method embodiment.

It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although the present invention has been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.

Claims

1. an inter-system switching method is characterized in that, comprising:

2. method according to claim 1 is characterized in that, first core network element in described first system obtains the CAMEL-Subscription-Information of user equipment (UE) in second system, comprising:

3. method according to claim 2 is characterized in that, described first core network element receives after the insertion subscription data message of described second CAMEL-Subscription-Information storage network element transmission, also comprises:

4. according to claim 2 or 3 described methods, it is characterized in that described first core network element receives first of described second CAMEL-Subscription-Information storage network element transmission and inserts after the subscription data message, also comprises:

5. according to each described method among the claim 1-4, it is characterized in that described first system is 2G system or 3G system, described second system is the 4G system; Perhaps, described first system is the 4G system, and described second system is 2G system or 3G system.

6. an inter-system switching method is characterized in that, comprising:

7. method according to claim 6 is characterized in that, described second CAMEL-Subscription-Information storage network element also comprises after described first core network element sends the first insertion subscription data message:

8. according to claim 6 or 7 described methods, it is characterized in that described second CAMEL-Subscription-Information storage network element also comprises after described first core network element sends the first insertion subscription data message:

9. according to each described method among the claim 6-8, it is characterized in that described second CAMEL-Subscription-Information storage network element receives after the location update request message of first core network element transmission, also comprises:

10. according to each described method among the claim 6-9, it is characterized in that described first system is 2G system or 3G system, described second system is the 4G system; Perhaps, described first system is the 4G system, and described second system is 2G system or 3G system.

11. an inter-system switching method is characterized in that, comprising:

12. switching device shifter between a system is characterized in that, comprising:

13. device according to claim 12 is characterized in that, described acquisition module specifically is used for:

14. device according to claim 13, it is characterized in that, described acquisition module also is used for after the insertion subscription data message that receives the transmission of described second CAMEL-Subscription-Information storage network element, sends first to described second CAMEL-Subscription-Information storage network element and inserts the subscription data response message;

15. according to claim 12 or 13 described devices, it is characterized in that, described acquisition module also is used for receiving second of described second CAMEL-Subscription-Information storage network element transmission and inserting subscription data message after the first insertion subscription data message that described second CAMEL-Subscription-Information storage of reception network element sends;

16., it is characterized in that described first system is 2G system or 3G system according to each described device among the claim 12-15, described second system is the 4G system; Perhaps, described first system is the 4G system, and described second system is 2G system or 3G system.

17. switching device shifter between a system is characterized in that, comprising:

18. device according to claim 17, it is characterized in that, described receiver module also is used for send the first insertion subscription data message to described first core network element after, receives the first insertion subscription data response message that described first core network element sends;

19. according to claim 17 or 18 described devices, it is characterized in that, described sending module, also be used for second CAMEL-Subscription-Information storage network element sends the first insertion subscription data message to described first core network element after, send second to described first core network element and insert subscription data message, so that described first core network element upgrades the CAMEL-Subscription-Information of described UE in described second system of storing in described first core network element according to described second CAMEL-Subscription-Information of described UE in described second system that inserts in the subscription data message;

20. according to each described device among the claim 17-19, it is characterized in that, described sending module, also be used for after the location update request message that receives the transmission of first core network element, send the canceling position registration message to the 3rd core network element, that described the 3rd core network element is that UE adhered to described in described second system, the core network element except described second core network element are so that the contextual information of the described UE of the local storage of described the 3rd core network element deletion;

21., it is characterized in that described first system is 2G system or 3G system according to each described device among the claim 17-20, described second system is the 4G system; Perhaps, described first system is the 4G system, and described second system is 2G system or 3G system.

22. switching device shifter between a system is characterized in that, comprising:

23. a network system is characterized in that, comprising: as switching device shifter between any described system of claim 12-16, as switching device shifter between switching device shifter and the system as claimed in claim 22 between any described system of claim 17-21.