CN102238669A

CN102238669A - Method for performing X2 switch through HeNB (home evolved NodeB)

Info

Publication number: CN102238669A
Application number: CN201010506108XA
Authority: CN
Inventors: 许丽香; 王弘; 梁华瑞
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2010-04-29
Filing date: 2010-09-30
Publication date: 2011-11-09
Anticipated expiration: 2030-09-30
Also published as: CN102238669B; HK1162825A1

Abstract

The invention provides a method for performing X2 switch through HeNB (home evolved NodeB), and is used when UE (user equipment) moves between HeNBs and between HeNB and macro eNB. The method comprises the following steps: an MME (mobility management entity) or HeNB gateway (HeNB GW) sends the MME identifier of the MME of UE to a source HeNB (S-HeNB); when the S-HeNB decides to switch UE to the destination HeNB (T-HeNB), the S-HeNB sends a switch request message including the MME identifier to the T-HeNB; the T-HeNB sends a path switch request message to the MME; and the MME sends a path switch request acknowledgement message to the T-HeNB. By using the method provided by the invention, frequent interaction with the core network in the switch process when switch is performed through S1 can be reduced on the premise of ensuring successful X2 switch so as to reduce influence of the switch process on the core network and reduce the switch delay.

Description

A kind of method of carrying out the X2 switching by base station from home HeNB

Technical field

The present invention relates to the communications field, particularly a kind of method of carrying out the X2 switching by base station from home (HeNB).

Background technology

In mobile communication system,, often need a plurality of radio resource management entity be formed a closed user group (CSG) at a specific UE group in order to provide better business service to specific subscriber equipment (UE) group.Such as, all UE of company or school inside are specific UE groups, at this UE group a plurality of radio resource management entity are formed a CSG, and special access service is provided.

The situation of a plurality of radio resource management entity being formed CSG at a specific UE group is ubiquitous in mobile communication system.For this situation more clearly is described, Long Term Evolution (LTE) system with system architecture evolution (SAE) is that example describes below.

Fig. 1 is the structural representation of LTE system.As shown in Figure 1, in the Radio Access Network of LTE system, radio resource management entity comprises macro base station (eNB) 101 and HeNB 102, and comprises home base-station gateway (HeNB GW) 103 alternatively.Wherein, link to each other by X2 interface between the eNB 101, each eNB 101 directly links to each other with mobile management entity (MME) 104 in the core net by the S1 interface respectively; HeNB 102 can link to each other with HeNB GW 103 by the S1 interface, link to each other with MME 104 by the S1 interface by HeNB GW 103 again, also can directly link to each other with MME104 by the S1 interface, perhaps, when not disposing HeNB GW 103 in the system, HeNB 102 directly links to each other with MME 104 by the S1 interface; And eNB 101 and HeNB 102 can be connected among a plurality of MME 104 in the core net.

For abundant more access service is provided, polytype radio resource management entity is provided, be example with the HeNB 102 in the described LTE of Fig. 1 system, comprised opening HeNB, mixed type HeNB and CSG type HeNB.Wherein, opening HeNB does not have the UE of specific access, and UE can insert opening HeNB arbitrarily; CSG type HeNB only allows the UE (for ease of describing, below abbreviate the user among the particular UE group as CSG UE) among the particular UE group of its service to insert; Mixed type HeNB then both can allow the CSG UE of its service to insert, so that provide the access service of high-quality more at this CSG UE, also can allow other non-CSG UE to insert simultaneously.

At present, UE switches by S1 when mobile between HeNB and HeNB and between HeNB and the eNB and realizes, switch to the concrete workflow that example illustrates that S1 switches with what Fig. 2 provided between HeNB and HeNB, as shown in Figure 2, this flow process may further comprise the steps:

Step 201: source (S)-HeNB sends handoff requirement message to HeNB GW, by HeNB GW the handoff requirement message that receives is sent to MME.

After step 202:MME receives the handoff requirement message that is sent by HeNB GW, return the handoff request message of agreeing that UE switches, and handoff request message is sent to purpose (T)-HeNB by HeNB GW to described HeNB GW.

After step 203:T-HeNB receives the handoff request message that is sent by HeNB GW, be the UE Resources allocation of needs switching.

Step 204: after distributing resource for UE, T-HeNB returns switching request acknowledgement message to HeNB GW, further, by HeNB GW described switching request acknowledgement message is sent to MME.

Step 205:MME sends to HeNB GW with switching command message after receiving switching request acknowledgement message, and by HeNB GW described switching command message is sent to S-HeNB.

Step 206:S-HeNB reconfigures message with Radio Resource control (RRC) connection and sends to UE, and notice UE can switch.

Step 207:UE switches.

Behind the step 208:UE handover success, send RRC to T-HeNB and connect to reconfigure and finish message.

Step 209:T-HeNB receive RRC that UE sends connect reconfigure finish message after, send handoff notification message to HeNB GW, and handoff notification message sent to MME by HeNB GW.

Step 210:MME can send to gateway (S-GW)/grouped data network gateway (PDN GW) and upgrade bearing request message after receiving handoff notification message, is used to notify S-GW and PDN GW to carry out the renewal of UE carrying.

Need to prove that in this step, S-GW and PDN GW can be a physical entity or the physical entity that separates, and omitted the interaction flow between S-GW and the PDN GW herein.

Step 211:S-GW/PDN GW upgrades the carrying of UE.

Step 212:S-GW returns the renewal bearing response message to MME after more new bearer is finished.

Step 213:UE initiates routing region updating (TAU) process.

Step 214:MME sends UE context release command message to HeNB GW, and further, HeNB GW sends to S-HeNB with UE context release command message, is used to discharge the resource that S-HeNB holds this UE.

Step 215:S-HeNB returns UE context Release complete to HeNB GW, and by HeNB GW UE context Release complete is sent to MME, discharges with notice MME resource and finishes.

So far, promptly finish the existing S1 that passes through that is adopted and switched the whole process that realizes that UE moves between HeNB.Have now when UE is mobile between HeNB and eNB, also switch by S1 and carry out, concrete workflow can repeat no more here referring to Fig. 2.

As can be seen from the above analysis, existing UE switches between the HeNB by S1 and will be undertaken by core net when mobile, comprise switching and prepare and data forwarding, because the HeNB number is very many, therefore, carry out if UE wants S1 to switch when mobile between HeNB at every turn, will certainly bring very heavy burden to core net, even can reduce the efficient of switching.

Consider that existing X2 switches preparation when handoff procedure and data forwarding does not need to be undertaken by MME, therefore, can be by the X2 handoff procedure being applied to UE moving between HeNB, Fig. 3 has provided the connection diagram of X2 switch application when the HeNB, Fig. 3 (a) is for switching the connection diagram that realizes that UE moves between HeNB by X2, Fig. 3 (b) realizes that for switching by X2 UE moves to the connection diagram of eNB from HeNB, and Fig. 3 (c) realizes that for switching by X2 UE moves to the connection diagram of HeNB from eNB.Because HeNB GW has NAS Node Selection Function, when HeNB inserts MME by HeNB GW, HeNB GW can select the MME of a service for the UE among this HeNB, and HeNB does not know the MME that HeNB GW is the UE selection, therefore, when carrying out the X2 switching, S-HeNB can't notify MME's that T-HeNB serves UE, just make that also T-HeNB or eNB or T-HeNB GW do not know which MME is path handoff request message sent to, if it is not the original MME that inserts of UE that message has been sent to, will cause the handoff procedure failure.

Be to identify UE's on the existing in addition S1 interface by MME UE S1 AP ID (the Access Layer protocol-identifier of the S1 interface unique identification UE in MME that MME distributes) and/or the eNB UE S1AP ID (the Access Layer protocol-identifier of the S1 interface unique identification UE in eNB that eNB distributes) that distributes to UE.In the process that X2 switches, source eNB sends to purpose eNB to the MME UE S1 AP ID that MME distributes in switching set-up procedure, purpose eNB issues MME to this MME UE S1 AP ID in the handoff request message of path, MME finds UE according to this sign, upgrades the beared information of UE at Serving GW then.

S1 interface between HeNB GW and MME identifies UE by the MME UE S1 APID of MME distribution and/or the eNB UE S1 AP ID of HeNB GW distribution.S1 interface between HeNB GW and HeNB identifies UE by the MME UE S1 AP ID of HeNB GW distribution and/or the eNB UE S1 AP ID of HeNB distribution.

HeNB only knows the MME UE S1 AP ID that HeNB GW distributes, and does not know the MME UE S1 AP ID that identifies UE between HeNB GW and MME that MME distributes.Move under the situation of eNB from HeNB at UE, if carrying out X2 switches, HeNB sends to purpose eNB to the MMEUE S1 AP ID that HeNB GW distributes, eNB sends to MME to the MME UE S1 AP ID that this HeNB GW distributes, MME distributes this MME UE S1 AP ID as MME the words of seeking UE, wrong UE be can find, core net more new bearer mistake or handoff failure caused.

Summary of the invention

In view of this, the invention provides a kind of method of carrying out the X2 switching by base station from home, can guarantee that the HeNB that inserts core net by HeNB GW successfully carries out the X2 switching, and reduced the frequent mutual of the handoff procedure that occurred when switching and core net by S1, thereby reduced the influence of handoff procedure, reduced the delay of switching core net.

In order to achieve the above object, the technical scheme of the present invention's proposition is:

A kind of method of carrying out the X2 switching by base station from home HeNB, this method comprises:

Mobile management entity MME or home base-station gateway HeNB GW send to source S-HeNB with the MME sign of the MME of user equipment (UE);

When UE was switched in the S-HeNB decision to purpose T-HeNB: the S-HeNB transmission had comprised the handoff request message of MME sign to T-HeNB; T-HeNB transmit path handoff request message is given MME; MME transmit path switching request acknowledgement message is given T-HeNB.

Describedly HeNB GW sent to S-HeNB with the MME of the MME of UE sign comprise:

MME sends initial context and sets up request message to HeNB GW, and HeNB GW sets up request message with described initial context and sends to S-HeNB, and described initial context is set up the MME sign of the MME that has comprised UE in the request message.

The initial context that can be only sends to S-HeNB at HeNB GW is set up the MME sign of the MME that comprises UE in the request message, and perhaps the initial context that sends to HeNB GW at MME is simultaneously set up the MME sign that initial context that request message and HeNB GW send to S-HeNB is set up the MME that all comprises UE in the request message.

Home base-station gateway HeNB GW is that the MME UE S1 APID of the distribution of user equipment (UE) sends to source S-HeNB with MME;

When UE was switched in the S-HeNB decision to purpose T-HeNB: the S-HeNB transmission had comprised the MME UE S1 AP ID handoff request message of MME distribution to T-HeNB; The T-HeNB transmission has comprised the MME UE S1 AP ID path handoff request message of MME distribution to MME; MME transmit path switching request acknowledgement message is given T-HeNB.

Described HeNB GW is that the MME UE S1 AP ID of the distribution of user equipment (UE) sends to S-HeNB and comprises with MME:

HeNB GW sends initial context and sets up request message to HeNB, and described initial context is set up, and to have comprised MME in the request message be the MME UE S1 AP ID of the distribution of user equipment (UE).

Described S-HeNB send comprised MME sign and/or MME be the handoff request message of MME UE S1 AP ID of distribution of user equipment (UE) to after the T-HeNB, T-HeNB transmit path handoff request message is given before the MME, this method also comprises:

T-HeNB sends handover request ack message to S-HeNB;

S-HeNB sends radio resource control RRC and reconfigures message to UE, and notice UE switches;

UE transmission RRC reconfigures and finishes message to T-HeNB.

Described T-HeNB transmit path handoff request message is given after the MME, and MME transmit path switching request acknowledgement message is given before the T-HeNB, and this method also comprises:

MME sends and revises bearing request message to gateway S-GW/ grouped data network gateway PDNGW;

S-GW/PDN GW sends and revises bearing response message to MME.

Described T-HeNB transmit path handoff request message comprises to MME:

The T-HeNB transmission has comprised the path handoff request message of MME sign to HeNB GW;

HeNB GW sends described path handoff request message to MME.

HeNB GW sends to and can comprise described MME sign in the described path handoff request message of MME or do not comprise.

Described MME transmit path switching request acknowledgement message is given after the T-HeNB, and this method further comprises:

T-HeNB sends resource release message to S-HeNB.

Described MME transmit path switching request acknowledgement message comprises to T-HeNB:

MME transmit path switching request acknowledgement message is given HeNB GW;

HeNB GW sends described path switching request acknowledgement message to T-HeNB.

In sum, method of carrying out the X2 switching by HeNB of the present invention, be when UE is connected to network by HeNB, by MME or HeNB GW the MME sign of the MME of UE is sent to HeNB, the MME UES1 AP ID that by HeNB GW with MME is the distribution of user equipment (UE) sends to source HeNB, when carrying out the X2 switching, HeNB can send to the purpose eNB/HeNB that UE need switch to described MME sign, also just make purpose eNB/HeNB can successfully path handoff request message be sent to MME into the UE service, when purpose HeNB inserts MME by HeNBGW, by purpose HeNB described MME sign is sent to the GW to purpose HeNB, make purpose HeNB GW can successfully path handoff request message be sent to MME into the UE service.HeNB can be that the MME UE S1 AP ID that user equipment (UE) distributes sends to the purpose eNB/HeNB that UE need switch to described MME, make that purpose eNB/HeNB can be that the MME UE S1 AP ID that user equipment (UE) distributes sends to MME with described MME, when purpose HeNB inserts MME by HeNB GW, is that the MME UE S1 AP ID that user equipment (UE) distributes sends to purpose HeNB GW by purpose HeNB with described MME, make that purpose HeNB GW can be that the MME UE S1 AP ID that user equipment (UE) distributes sends to MME with MME, thereby make MME correctly find the UE of switching.Under the prerequisite that guarantees the X2 handover success, reduced the frequent mutual of the handoff procedure that occurred when switching and core net, thereby reduced the influence of handoff procedure core net by S1, reduced the delay of switching.

Description of drawings

Fig. 1 is the structural representation of LTE system;

Fig. 2 has now to carry out the workflow diagram that S1 switches between HeNB and HeNB;

Fig. 3 is with the various syndeton schematic diagrames of X2 switch application when the HeNB;

Syndeton schematic diagram when Fig. 4 carries out the X2 switching for the present invention by HeNB;

Fig. 5 is the workflow diagram of UE of the present invention by HeNB access network embodiment;

Fig. 6 carries out the workflow diagram that X2 switches embodiment for the present invention by HeNB.

Embodiment

In order to solve problems of the prior art, the present invention proposes a kind of method of carrying out the X2 switching by HeNB, when UE is connected to network by HeNB, by MME or HeNB GW the MME sign of the MME of UE is sent to HeNB, when carrying out the X2 switching, HeNB can send to the purpose eNB/HeNB that UE need switch to described MME sign, also just make purpose eNB/HeNB can successfully path handoff request message be sent to MME into the UE service, when purpose HeNB inserts MME by HeNB GW, by purpose HeNB described MME sign is sent to purpose HeNB GW, make purpose HeNB GW can successfully path handoff request message be sent to MME into the UE service, under the prerequisite that guarantees the X2 handover success, reduced the frequent mutual of the handoff procedure that occurred when switching and core net by S1, thereby reduced the influence of handoff procedure, reduced the delay of switching core net.

Based on above-mentioned introduction, the specific implementation of scheme of the present invention comprises:

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.

Fig. 4 has provided the syndeton when the present invention carries out the X2 switching by HeNB, and this syndeton is actually Fig. 3 (a) and (b) and comprehensive schematic diagram (c).As shown in Figure 4, each eNB links to each other with MME by the S1 interface respectively with HeNB GW, and HeNB links to each other with certain HeNB GW wherein by the S1 interface, and is then continuous by X2 interface between eNB and HeNB and the HeNB.In addition, in the present embodiment, eNB and other radio resource management entity also can link to each other with GW by the S1 interface, and then are linked to each other with MME by the S1 interface by GW.

Fig. 5 has provided the workflow diagram by HeNB access network embodiment of UE under the described syndeton of Fig. 4, the detailed description of having omitted the step that has nothing to do with the present invention among this figure.As shown in Figure 5, this flow process may further comprise the steps:

Step 501:UE sends Non-Access Stratum (NAS) message to S-HeNB, as connecting (Attach) message or business request information etc.

Step 502:S-HeNB sends to HeNB GW by S1 access protocol (AP) message with the NAS message that UE sends, and by HeNB GW described S1 AP message is sent to MME.

Need to prove, in this step, be CSG type or mixed type if UE requires the S-HeNB that inserts, and also comprised the CSG sign of S-HeNB sub-district in the then described S1 AP message.

Step 503:MME after receiving NAS message, carry out and UE between the NAS authentication/security processes.

Specifically how to carry out the NAS authentication/security processes and be prior art, repeat no more here.And the UE context of this UE does not exist in network, and the Attach request in step 501 and 502 does not have integrity protection, and perhaps when integrity verification was failed, authentication and NAS safety activate integrity protection and the NAS encryption is essential; Otherwise this process is optional.And when the NAS security algorithm changed, NAS safety was set up and need be carried out in this step.

Need to prove, be urgent if MME has been configured to support not authenticate urgent Attach and the UE indication Attach type of IMSI, and MME skip authentication and safety are set up under the situation that process or MME accept authentification failure and continued the Attach process.

Step 504:MME sends initial context and sets up request message to HeNB GW, and by HeNBGW described initial context is set up request message and send to S-HeNB.

Need to prove, described initial context is set up the MME sign of the MME that has comprised UE in the request message, MME sign can be carried at the initial context that MME sends among the HeNB GW and set up in the request message, and be carried at the initial context that HeNB GW sends to S-HeNB and set up in the request message, perhaps only be carried at the initial context that HeNB GW sends to S-HeNB and set up in the request message.Be as the criterion with the realization that does not influence the embodiment of the invention in the reality.

Need to prove that described MME sends to the initial context of HeNB GW and sets up the MME UE S1 AP ID that has comprised the MME distribution in the request message.The initial context that described HeNB GW sends to HeNB is set up and has been comprised the MME UE S1 AP ID that MME that MME UE S1 AP ID that HeNB GW distributes and HeNB GW receive from MME distributes in the request message.

After step 505:S-HeNB receives that initial context is set up request message, can set up and UE between radio bearer.

Step 506: behind the radio bearer of setting up good and UE, S-HeNB sends initial context and sets up response message to HeNB GW, and further, HeNB GW sets up response message with described initial context and sends to MME.

So far, promptly finished the whole workflow of UE of the present invention by HeNB access network embodiment.

Behind the radio bearer of having set up between described UE of present embodiment and the S-HeNB, can carry out X2 by HeNB and switch, its concrete workflow is referring to Fig. 6.As shown in Figure 6, omitted the detailed description of the step that has nothing to do with the present invention here.This flow process may further comprise the steps:

Step 601:S-HeNB makes and switches decision.

Step 602:S-HeNB sends handoff request message to T-HeNB.

Need to prove, in this step, comprised the MME sign of the MME of UE in the described handoff request message.

The method that two kinds of identification UE are arranged among the present invention:

Method one, source HeNB comprises the MME UE S1AP ID that MME distributes in described handoff request message.

Method two, if source base station is eNB, perhaps the purpose base station is eNB, perhaps the purpose base station is the HeNB (as be connected to different HeNB GW or directly insert core net) that is not connected to same HeNB GW with source HeNB, comprises the MME UES1 AP ID that MME distributes in the then described handoff request message.If purpose HeNB and source HeNB are connected to same HeNB GW, comprise the MME UE S1 AP ID that HeNB GW distributes in the then described handoff request message, and comprise the indication that an indication is the MME UE S1 AP ID of HeNB GW distribution.

Source base station can pass through configuration information, perhaps by purpose eNB sign, perhaps knows that by the PCI scope of purpose sub-district the purpose base station is eNB or HeNB.Source base station can know whether the purpose base station is connected to source HeNB GW by the TA tabulation that purpose sub-district place TA and source HeNB GW support.This part is not an emphasis of the present invention, can be other mode and do not influence main contents of the present invention.Here ignore detailed technical descriptioon to other schemes.

Step 603:T-HeNB sends handover request ack message to S-HeNB.

Step 604:S-HeNB sends the RRC connection and reconfigures message to UE, and request UE switches.

Step 605:UE switch finish after, send RRC and connect to reconfigure and finishes message to T-HeNB.

Step 606:T-HeNB transmit path handoff request message is given HeNB GW, and by HeNB GW described path handoff request message is sent to MME.

Need to prove, in this step, comprised the MME sign of the MME that serves UE in the handoff request message of described path.

Described path handoff request message can also comprise the CSG sign of T-HeNB.Further, can also comprise the access module of T-HeNB in the handoff request message of described path, as mixed type etc., and the value of access module also can comprise the CSG type, perhaps access module do not exist and the CSG sign to be used for implicit expression T-HeNB be the CSG type.

Also it should be noted that, in this step, when T-HeNB is not that described path handoff request message is directly to send to MME by T-HeNB when inserting MME by HeNB GW.

Need to prove, in this step, comprised the MME UE S1 AP ID that receives from source HeNB in the handoff request message of described path.

The method one of identification UE among the present invention in the corresponding step 602, purpose HeNB is included in the MME UE S1 AP ID that receives from source base station the handoff request message of path and sends to HeNB GW.HeNBGW looks for the UE context according to the MME UE S1 AP ID that GUMMEI and MME distribute, thereby knows whether it is switching (can find corresponding UE context) under the same HeNB GW.HeNBGW transmit path handoff request message is given MME, and described message comprises the MMEUE S1AP ID that receives from the purpose base station.MME finds UE (being that the MME UE S1APID that MME distributes searches the UE context) according to existing mode.

The method two of identification UE among the present invention in the corresponding step 602, HeNB GW and MME find correct UE context in the following manner: if the purpose base station is eNB or the HeNB that is directly connected to MME, then MME finds the UE context according to the MME S1 AP ID that receives (implication is that MME distributes).

The method two of identification UE among the present invention in the corresponding step 602, if the purpose base station is connected to MME by HeNBGW, if the purpose base station has received that from source base station MME UE S1 AP ID is the indication that HeNBGW distributes, the purpose base station comprises this indication in the handoff request message of described path.Under the situation that described indication exists, HeNB GW according to the MME S1 AP ID in the handoff request of path be HeNB GW distribute look for the UE context.Otherwise HeNB GW is that MME distributes according to described MME S1 AP ID and MME sign GUMMEI looks for the context whether UE is arranged, thereby knows whether it is switching (can find corresponding UE context) under the same HeNB GW.Shown under the non-existent situation of indication, the MME UE S1 AP ID that HeNB GW distributes the MME that receives is included in the path handoff request message that HeNB GW sends to MME.Under the situation that indication exists described in the path handoff request message that HeNB GW receives from HeNB, after HeNB GW found the UE context, the MME UE S1AP ID that MME is distributed covered in the path handoff request message that sends to MME.MME finds the UE context according to the MME S1 AP ID that receives (implication is that MME distributes).

Step 607:MME sends and revises bearing request message to S-GW/PDN GW.

MME is according to the CSG sign of the purpose sub-district of carrying in the path handoff request message that receives and the access module information of purpose sub-district, the CSG sign of purpose sub-district and the access module of purpose sub-district have been known, if the purpose sub-district is a mixed type, it is that the signatory member of purpose sub-district also is non-signatory member that MME can determine UE according to the CSG of purpose sub-district sign, therefore, in this step, if PDN GW has asked the user CSG information (knowing according to the UE context) of UE, MME can carry user CSG information in sending to the modification bearing request message of S-GW/PDN GW, described user CSG information comprises the CSG sign of purpose sub-district, access module and UE are that the signatory member of purpose sub-district also is non-signatory member, so that follow-up PDN GW charges to UE by corresponding manner.How PDN GW asks MME to report user CSG information is prior art, repeats no more.

Step 608:S-GW/PDN GW sends and revises bearing response message to MME after the carrying of having revised UE.

Step 609:MME transmit path switching request acknowledgement message is given HeNB GW, and further, HeNB GW gives T-HeNB with described path switching request acknowledgement message.

In this step, when T-HeNB be not that described path switching request acknowledgement message is directly to send to T-HeNB by MME when inserting MME by HeNB GW.

Step 610: receiving the road after switching request acknowledgement message, T-HeNB sends resource release message to S-HeNB.

So far, promptly finished the present invention and carried out the whole workflow that X2 switches embodiment by HeNB.

Need illustrate, the described embodiment of Fig. 5 and Fig. 6 only switches to example and describes to carry out X2 between HeNB and the HeNB, in actual applications, above-mentioned handoff procedure also switches applicable to carrying out X2 between eNB and the HeNB by HeNB GW access core net, detailed process is the same, no longer it is given unnecessary details here.

In a word, method of carrying out the X2 switching by HeNB of the present invention, be by when UE passes through the HeNB access network, by MME or HeNB GW the MME sign of the MME of UE is sent to HeNB, the MME UE S1AP ID that by HeNB GW with MME is the distribution of user equipment (UE) sends to source HeNB, when carrying out the X2 switching, HeNB can send to the purpose eNB/HeNB that UE need switch to described MME sign, also just make purpose eNB/HeNB can successfully path handoff request message be sent to MME into the UE service, when purpose HeNB inserts MME by HeNB GW, by purpose HeNB described MME sign is sent to the GW to purpose HeNB, make purpose HeNB GW can successfully path handoff request message be sent to MME into the UE service.HeNB can be that the MME UE S1 AP ID that user equipment (UE) distributes sends to the purpose eNB/HeNB that UE need switch to described MME, make that purpose eNB/HeNB can be that the MME UE S1 AP ID that user equipment (UE) distributes sends to MME with described MME, when purpose HeNB inserts MME by HeNBGW, is that the MMEUE S1 AP ID that user equipment (UE) distributes sends to purpose HeNB GW by purpose HeNB with described MME, make that purpose HeNB GW can be that the MME UE S1 AP ID that user equipment (UE) distributes sends to MME with MME, thereby make MME correctly find the UE of switching.Under the prerequisite that guarantees the X2 handover success, reduced the frequent mutual of the handoff procedure that occurred when switching and core net, thereby reduced the influence of handoff procedure core net by S1, reduced the delay of switching.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims

1. one kind is carried out the method that X2 switches by base station from home HeNB, it is characterized in that this method comprises:

2. method according to claim 1 is characterized in that, describedly HeNB GW is sent to S-HeNB with the MME of the MME of UE sign comprises:

MME sends initial context and sets up request message to HeNB GW, and HeNB GW sets up request message with described initial context and sends to S-HeNB, and described initial context is set up and comprised the MME sign that HeNB GW is the MME that selects of UE in the request message.

3. method according to claim 2, it is characterized in that, the initial context that can be only sends to S-HeNB at HeNB GW is set up the MME sign of the MME that comprises UE in the request message, and perhaps the initial context that sends to HeNB GW at MME is simultaneously set up the MME sign that initial context that request message and HeNB GW send to S-HeNB is set up the MME that all comprises UE in the request message.

4. method according to claim 1 and 2 is characterized in that, mobile management entity MME or home base-station gateway HeNB GW are that the MME UE S1 AP ID that user equipment (UE) distributes sends to source S-HeNB with MME; It is the MME UES1 AP ID that user equipment (UE) distributes that described handoff request message contains MME.

5. method according to claim 4 is characterized in that, it is the MME UE S1 AP ID that user equipment (UE) distributes that described path handoff request message contains MME.

6. method according to claim 1 or 5 is characterized in that, described T-HeNB transmit path handoff request message is given after the MME, and MME transmit path switching request acknowledgement message is given before the T-HeNB, and this method also comprises:

S-GW/PDN GW sends and revises bearing response message to MME.

7. method according to claim 1 or 5 is characterized in that described T-HeNB transmit path handoff request message comprises to MME:

T-HeNB sends that to have comprised MME sign or MME be that the path handoff request message of MME UES1 AP ID of distribution of user equipment (UE) is to HeNB GW;

HeNB GW sends described path handoff request message to MME.

8. method according to claim 7 is characterized in that, HeNB GW sends to and can comprise described MME sign in the described path handoff request message of MME or do not comprise.