CN102378145A

Movatterモバイル変換

Info

Publication number: CN102378145A
Application number: CN2010102578249A
Authority: CN
Inventors: 张亮亮; 菲利普·赖宁格; 王燕; 蔺波
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2010-08-12
Filing date: 2010-08-12
Publication date: 2012-03-14
Anticipated expiration: 2030-08-12
Also published as: CN102378145B; WO2012019471A1

Abstract

Translated fromChinese

本发明实施例提供一种切换方法、接入节点和宿主站点，该切换方法包括：接入节点向所述接入节点的宿主站点请求所述接入节点覆盖范围内的用户设备附着的移动管理实体所属的移动管理实体池信息；所述接入节点接收所述宿主站点发送的所述用户设备附着的移动管理实体所属的移动管理实体池信息；所述接入节点根据所述移动管理实体池信息进行所述用户设备的切换。本发明实施例实现了接入节点获得进行切换类型判决时所需的用户设备附着的移动管理实体所属的移动管理实体池信息，提高了切换类型判决的准确性，保证了切换的顺利进行。

An embodiment of the present invention provides a handover method, an access node, and a host site. The handover method includes: the access node requests the host site of the access node for mobility management of user equipment attachment within the coverage of the access node Information about the mobility management entity pool to which the entity belongs; the access node receives information about the mobility management entity pool to which the mobility management entity to which the user equipment is attached is sent by the host site; the access node, according to the mobility management entity pool information to perform handover of the user equipment. The embodiment of the present invention enables the access node to obtain the information of the MME pool to which the MME attached to the user equipment belongs when judging the handover type required by the access node, improves the accuracy of the handover type judgment, and ensures the smooth progress of the handover.

Description

Changing method, access node and host site

Technical field

The present invention relates to communication technical field, relate in particular to a kind of changing method, access node and host site.

Background technology

At Long Term Evolution (Long Term Evolution; Hereinafter to be referred as: LTE) in the system, the difference of switching based on the switching reference point is divided into two kinds of switching types: based on the switching of X2 interface, hereinafter to be referred as: X2 switches; And based on the switching of S1 interface, hereinafter to be referred as: S1 switches.

X2 switches with source evolution base station (Evolution Node B; Hereinafter to be referred as: eNB) and the X2 interface between the target eNB be reference point, in the X2 handoff procedure, subscriber equipment (User Equipment; Hereinafter to be referred as: the mobile management entity that UE) is adhered to (Mobility Management Equipment; Hereinafter to be referred as: MME) can not change, promptly X2 switches between the MME that is adhered to source eNB and UE and has the S1 interface, and to have the S1 interface between MME that UE adhered to and the target eNB be prerequisite.

When the X2 switching took place UE, source eNB was through directly sending X2 application protocol (X2Application Protocol to target eNB; Hereinafter to be referred as: X2AP) message, for example: handoff request (X2AP:HandoverRequest) message, switch to trigger X2.

Under the S1 handoff scenario, the UE handoff procedure is a reference point with the S1 interface, and this moment, MME that UE adhered to possibly change, and the MME that is adhered to by source MME decision-making whether need change UE also chooses target MME.When the S1 switching took place UE, source eNB sent S1 Application Protocol (S1 ApplicationProtocol to source MME; Hereinafter to be referred as: S1AP) message, for example: handoff request (S1AP:Handover Required) message, and send S1AP:Handover Request message through target MME to target eNB by source MME and initiate the S1 switching.

At LTE/ System Architecture Evolution (System Architecture Evolution; Hereinafter to be referred as: SAE), with the unique mobile management entity identifier in the whole world (Globally Unique MME Identifier; Hereinafter to be referred as: GUMMEI) come MME of unique identification, GUMMEI is by public land mobile communication network sign (Public Land Mobile-communication Network Identifier; Hereinafter to be referred as: PLMNID), global unique group id (Globally Unique Group Identifier; Hereinafter to be referred as: GU GroupID) and MME code (MME Codec; Hereinafter to be referred as: MMEC) form, wherein PLMN ID is a network identity; GU Group ID is that MME group (MME Group) is the sign of mobile management entity pond (MMEpool), is used at a public land mobile communication network (Public LandMobile-communication Network; Hereinafter to be referred as: MMEpool of unique identification PLMN); MMEC is the MME sign, is used for MME of unique identification in a MME pool.

In the LTE system, introduced via node (Relay Node; Hereinafter to be referred as: RN) afterwards, RN possibly can't obtain the ME information that UE adheres in following situation:

1) in attach flow process or TAU flow process, when not carrying registeredMME information in the RRC connection setup complete message as if the UE transmission, (the Donor eNB of the donor base station in the junction network; Hereinafter to be referred as: DeNB) just can not obtain the historical MME information that this UE adheres to (perhaps UE last time appended MME information in network), for example: the sign GUMMEI of the MME that this UE adheres to.At this moment, DeNB can select MME for UE, and RN can't know that which MME the final MME that selects of DeNB is.

2) even the historical MME information that DeNB can adhere to through the registeredMME information acquisition UE that RRC connection setup complete message is carried; But because the MME that UE finally adheres to is selected by DeNB, RN can't know that which MME the final MME that selects of DeNB is.

In a word, because the MME at terminal is DeNB selects, so RN can't obtain the MME information of adhering at its terminal, adopts X2 interface to switch this moment and handoff failure possibly occur under junction network.

Summary of the invention

The embodiment of the invention provides a kind of changing method, access node and host site; Mobile management entity pond information under the mobile management entity that required subscriber equipment adheres to when obtaining to carry out the switching type judgement with the realization access node guarantees carrying out smoothly of switching.

The embodiment of the invention provides a kind of changing method, comprising:

Mobile management entity pond information under the mobile management entity that the subscriber equipment of access node in the said access node coverage of the host site request of said access node adheres to;

Said access node receives the mobile management entity pond information under the mobile management entity that said subscriber equipment that said host site sends adheres to;

Said access node carries out the switching of said subscriber equipment according to said mobile management entity pond information.

The embodiment of the invention also provides a kind of changing method, comprising:

The host site of access node receives the S1 message that mobile management entity that the subscriber equipment in the said access node coverage adheres to sends;

Said host site is sent S1 message to said access node; Comprise the affiliated mobile management entity pond information of mobile management entity that said subscriber equipment adheres in the S1 message that said host site is sent, carry out the switching of said subscriber equipment according to said mobile management entity pond information for said access node.

The host site of access node is that a plurality of subscriber equipmenies in the said access node coverage are selected identical mobile management entity or mobile management entity pond;

Mobile management entity pond information under the mobile management entity that the sign of the mobile management entity that said host site is adhered to said a plurality of subscriber equipmenies or said a plurality of subscriber equipmenies adhere to; Send to said access node, switch according to the sign or the said mobile management entity pond information of said mobile management entity for said access node.

Mobile management entity pond information under the mobile management entity that subscriber equipment in the said access node coverage that the host site reception O&M system of access node sends adheres to;

Mobile management entity pond information under the mobile management entity that said host site is adhered to the subscriber equipment in the said access node coverage; Send to said access node, carry out the switching of said subscriber equipment according to said mobile management entity pond information for said access node.

The embodiment of the invention also provides a kind of access node, comprising:

Request module is used for the mobile management entity pond information under the mobile management entity that the subscriber equipment in the said access node coverage of the host site request of said access node adheres to;

Receiver module is used to receive the mobile management entity pond information under the mobile management entity that said subscriber equipment that said host site sends adheres to;

Handover module is used for carrying out the switching of said subscriber equipment according to said mobile management entity pond information.

The embodiment of the invention also provides a kind of host site, comprising:

The message sink module is used to receive the S1 message that mobile management entity that the subscriber equipment in the access node coverage that said host site connects adheres to sends;

First sending module; Be used for sending S1 message to said access node; Comprise the affiliated mobile management entity pond information of mobile management entity that said subscriber equipment adheres in the S1 message that said first sending module sends, carry out the switching of said subscriber equipment according to said mobile management entity pond information for said access node.

The embodiment of the invention also provides a kind of host site, comprising:

Select module, be used to interior identical mobile management entity or the mobile management entity pond of a plurality of subscriber equipmenies selections of access node coverage that said host site connects;

Second sending module; Mobile management entity pond information under the mobile management entity that the sign of the mobile management entity that is used for said a plurality of subscriber equipmenies are adhered to or said a plurality of subscriber equipmenies adhere to; Send to said access node, switch according to the sign or the said mobile management entity pond information of said mobile management entity for said access node.

The embodiment of the invention also provides a kind of host site, comprising:

Information receiving module is used to receive the mobile management entity pond information under the mobile management entity that the subscriber equipment in the access node coverage that said host site that the O&M system sends connects adheres to;

The 3rd sending module; Mobile management entity pond information under the mobile management entity that is used for the subscriber equipment in the said access node coverage is adhered to; Send to said access node, carry out the switching of said subscriber equipment according to said mobile management entity pond information for said access node.

Pass through the embodiment of the invention; Access node can receive the mobile management entity pond information under the mobile management entity that the subscriber equipment in this access node coverage that host site sends adheres to; Thereby realized the affiliated mobile management entity pond information of mobile management entity that required subscriber equipment adhered to when access node obtained to carry out the switching type judgement; Improve the accuracy of switching type judgement, guaranteed carrying out smoothly of switching.

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; Obviously, the 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 changing method embodiment one of the present invention;

Fig. 2 is the flow chart of changing method embodiment two of the present invention;

Fig. 3 is the flow chart of changing method embodiment three of the present invention;

Fig. 4 is the flow chart of changing method embodiment four of the present invention;

Fig. 5 is the flow chart of changing method embodiment five of the present invention;

Fig. 6 is the flow chart of changing method embodiment six of the present invention;

Fig. 7 has disposed the sketch map of the embodiment of the LTE network architecture of HeNB for the present invention;

Fig. 8 is the structural representation of access node embodiment one of the present invention;

Fig. 9 is the structural representation of host site embodiment one of the present invention;

Figure 10 is the structural representation of host site embodiment two of the present invention;

Figure 11 is the structural representation of host site embodiment three of the present invention.

Embodiment

For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.

Fig. 1 is the flow chart of changing method embodiment one of the present invention, and as shown in Figure 1, this method can comprise:

Step 101, the MME pool information under the MME that the UE of access node in this access node coverage of host site request of this access node adheres to.

In the present embodiment, MME pool is meant the logic region that a plurality of ME form, and these MME that form same MME pool are equal to.UE in a MME pool can not need change the MME that is adhered to and obtains Non-Access Stratum (Non-Access Stratum; Hereinafter to be referred as: NAS) service can overlap between the different MME pool.

Particularly; This access node can send S1 message, X2 message, non access stratum NAS message or RRC message to host site, and the request of in S1 message, X2 message, non-access layer information or radio resource control information, carrying obtains the indication information of the MME pool information under the MME that the UE in this access node coverage adheres to.Can certainly other type of messages, do not limit at this.

In the present embodiment, access node is used to the node in its coverage, and for example: UE access service is provided, and this access node is connected to core net one side through its host site.In an example, this access node can be RN, and host site can be base station, for example DeNB; In another example, this access node is family's evolution base station (Home Evolution Node B; Hereinafter to be referred as: HeNB) or Home eNodeB (Home Node B; Hereinafter to be referred as: HNB) etc., host site can home gateway, for example family's evolution base station gateway (HeNB Gateway; Hereinafter to be referred as: HeNB GW) or femto gateway (HNB Gateway; Hereinafter to be referred as: HNB GW) etc.

Step 102, the MME pool information under the MME that the above-mentioned UE that access node reception host site is sent adheres to.

Wherein, the MME pool information under the MME that adheres to of above-mentioned UE can identify with the form of GUMMEI or GU Group ID.

Step 103, access node carries out the switching of UE according to this MME pool information.

Particularly, this access node can be confirmed the switching type of this UE according to above-mentioned MME pool information, and this UE is carried out the corresponding switching of this switching type.

Wherein, If the MME that current UE is adhered to (is the neighbor site of sourcesink home site or access node at the switching target website; This neighbor site can be base station, HeNB, HeNB GW, HNB or HNB GW etc.) among certain MME pool of being connected; Be that the MME that current UE is adhered to has when connection with the switching target website, the switching mode that then adopts is that X2 switches; Otherwise, if the MME that current UE is adhered to not with MME pool that targeted sites is connected in the time, when promptly the MME that adheres to of current UE was not connected with the switching target website, the switching mode that then adopts was that S1 switches.What above-mentioned situation was directed against is the situation that has the X2 interface that can be used for switching between sourcesink home site and the switching target website.

Be appreciated that in some cases, do not exist X2 interface or X2 interface to be not useable for switching between sourcesink home site and the targeted sites, need this moment to adopt S1 to switch.

In the foregoing description; MME pool information under the MME that access node can adhere to the UE in this access node coverage of host site request of this access node; This access node can receive the MMEpool information under the MME that the UE in this access node coverage that host site sends adheres to then; Thereby realized the affiliated MME pool information of MME that required UE adhered to when access node obtained to carry out the switching type judgement; Improve the accuracy of switching type judgement, guaranteed carrying out smoothly of switching.

Fig. 2 is the flow chart of changing method embodiment two of the present invention, and present embodiment is that RN, host site are that DeNB is that example describes with the access node.As shown in Figure 2, this method can comprise:

Step 201, RN sends S1 message, and for example: UE initial message (initial UE message) is given DeNB, and the request of carrying in this S1 message obtains the indication information of the MME pool information under the MME that the UE in this RN coverage adheres to.

Wherein, the request indication information that obtains the MME pool information under the MME that the UE in this RN coverage adheres to can be a cell (Information Element who is used to ask to obtain the MME pool information under the MME that the UE in this RN coverage adheres to; Hereinafter to be referred as IE) or sign (flag).

Step 202, DeNB receives after this S1 message, the MME that adheres to the UE in the RN coverage this S1 forwards; The request of carrying in this S1 message obtains the indication information of the MME pool information under the MME that the UE in this RN coverage adheres to.

In this step, DeNB might act on behalf of the S1 message that (proxy) function sends RN and carry out some correlated identities (Identifier; Hereinafter to be referred as: change ID), do not influence the realization of the embodiment of the invention, do not limit at this.

Step 203, MME sends initial context and sets up request (initial context setup request) message to DeNB, and this initial context is set up and has been comprised the affiliated MME pool information of MME that above-mentioned UE adheres in the request message.

Step 204, DeNB sends initial context and sets up request message to RN, and this initial context is set up and has been comprised the affiliated MME pool information of MME that above-mentioned UE adheres in the request message.

Step 205, RN sends initial context and sets up response message to DeNB.

Step 206, DeNB sends initial context and sets up response message to MME.

In the present embodiment, after the MME pool information under obtaining the MME that UE adheres to, RN can carry out the switching of UE according to this MME pool information, and the mode that provides in concrete implementation and the present invention'sstep 103 embodiment illustrated in fig. 1 is identical, repeats no more at this.

MME pool information under the MME that required UE adhered to when the foregoing description had been realized the judgement of access node acquisition carrying out switching type has improved the accuracy of switching type judgement, has guaranteed carrying out smoothly of switching.

Fig. 3 is the flow chart of changing method embodiment three of the present invention, and present embodiment is that RN, host site are that DeNB is that example describes with the access node.As shown in Figure 3, this method can comprise:

Step 301, RN sends S1 message, and for example: initial UE message gives DeNB, and the request of carrying in this S1 message obtains the indication information of the MMEpool information under the MME that the UE in this RN coverage adheres to.

Wherein, the request indication information that obtains the MME pool information under the MME that the UE in this RN coverage adheres to can be an IE or a flag who is used to ask to obtain the MME pool information under the MME that the UE in this RN coverage adheres to.

Step 302, DeNB receives after this S1 message, the MME that adheres to the UE in the RN coverage this S1 forwards.Step 302 is with the difference of the present invention's step 202 embodiment illustrated in fig. 2; DeNB has obtained the MME pool information under the MME that above-mentioned UE adheres to, can not comprise in DeNB sends to the S1 message of MME that therefore request obtains the indication information of the MME pool information under the MME that the UE in this RN coverage adheres to.

Step 303, MME sends initial context and sets up request (initial context setup request) message to DeNB.Step 303 is with the difference of Fig. 2 embodiment step 203 of the present invention; MME does not receive that DeNB request obtains the indication information of the MMEpool information under the MME that the UE in this RN coverage adheres to, therefore need not to set up the MME pool information of carrying in the request under the MME that above-mentioned UE adheres at initial context.

Step 304, DeNB sends initial context and sets up request message to RN, and this initial context is set up and has been comprised the affiliated MME pool information of MME that above-mentioned UE adheres in the request message.

Step 305, RN sends initial context and sets up response message to DeNB.

Step 306, DeNB sends initial context and sets up response message to MME.

Fig. 2 of the present invention and embodiment illustrated in fig. 3; With mutual S1 message between RN, DeNB and the MME is that example describes; But the embodiment of the invention is not limited in this; Can realize the flow process of the embodiment of the invention between RN and the DeNB or between DeNB and the MME through various types of message such as mutual X2 message, NAS message or RRC message, the embodiment of the invention does not limit this yet.

Fig. 2 of the present invention and embodiment illustrated in fig. 3 in, the form of UE initial message (initial UE message) can be as shown in table 1; The form of initial context foundation request (initial context setup request) message can be as shown in table 2.

Table 1

Wherein, the mobile management entity pond information request in the table 1 (MME pool information request) list item is the newly-increased list item of the embodiment of the invention.

Table 2

Wherein, the GUMMEI in the table 2, GU group ID, GUMMEI index (GUMMEI index) or GU group index list item are the newly-increased list item of the embodiment of the invention.

The GUMMEI here, GU group ID, GUMMEI index (GUMMEI index) or GU group index list item can be represented a GUMMEI, GU group ID, GUMMEI index (GUMMEI index) or GU group index, also can represent a plurality of GUMMEI, GUgroup ID, GUMMEI index (GUMMEI index) or GU group index.Wherein, What above-mentioned a plurality of GUMMEI, GU group ID, GUMMEI index (GUMMEI index) or GUgroup index represented can be all titles of this MME; For example: suppose that the title of certain MME in MMEpool1 is GUMMEI1; And the title in MME pool2 is GUMMEI2, and the title in MME pool3 is GUMMEI3, then in table 2; 3 titles that can comprise this MME simultaneously are like 3 GUMMEI, 3 GU group ID, 3 GUMMEI index (GUMMEIindex) or 3 GU group index.

In a word; In all embodiment of the present invention; Access node (for example: the index in GUMMEI, GU group ID or the mobile management entity pond of the MME that the UE that RN) obtains adheres to; Can be a GUMMEI, GU group ID, GUMMEI index (GUMMEI index) or GU groupindex, also can be a plurality of GUMMEI, GU group ID, GUMMEI index (GUMMEIindex) or GU group index.Above-mentioned a plurality of GUMMEI, GU group ID, GUMMEI index (GUMMEI index) or GU group index; Can be all signs of the MME that adheres to of UE, that is to say all GUMMEI, GU group ID, GUMMEI index (GUMMEI index) or the GU group index of this MME of expression.

In Fig. 1 of the present invention, Fig. 2 and a kind of implementation embodiment illustrated in fig. 3; If carried registeredMME information in the RRC message; And host site is MME that UE selects when not being the MME of this registeredMME message identification, and access node can receive the affiliated MME pool information of MME that this host site that host site sends is selected for this subscriber equipment.The RRC that above-mentioned implementation is sent to UE connects foundation and accomplishes the situation of carrying registeredMME information in (RRC connection setup complete) message, is that RN, host site are that DeNB is that example is further elaborated below with the access node.

Particularly, in one embodiment, the information of the MME that RN can adhere to through this UE of registeredMME information acquisition that carries in the RRC connection setup complete message comprises registeredMME information in the UE initial message that RN sends like this.After DeNB receives the UE initial message that RN sends, still for this UE selected be not this registeredMME information indicated MME the time, this moment, DeNB can send MME pool information under the MME that this DeNB selects to RN.

In another embodiment, when DeNB had selected MME that above-mentioned registeredMME information indicated for this UE, DeNB need not send MME pool information and gave RN this moment.

In another execution mode, if do not carry registeredMME information in the RRC connection setup complete message that UE sends, then the MMEpool information that can send under the MME that this DeNB selects of DeNB is given RN.

Fig. 4 is the flow chart of changing method embodiment four of the present invention, and as shown in Figure 4, this changing method can comprise:

Step 401, the S1 message that the MME that the UE in this access node coverage of host site reception of access node adheres to sends.

In a kind of implementation of present embodiment, alternatively, can comprise the affiliated MME pool information of MME that this UE adheres in the S1 message that the MME that this UE adheres to sends.Be RN below with the access node, host site is that DeNB is that example describes.For example: whether insert through RN because MME can be known UE; Therefore MME can only be directed against the UE that inserts through RN, and in S1 message for example: initial context is set up the affiliated MME pool information of MME that comprises this UE in request (initial context setup request) message.And for not being the UE that inserts through RN, for example: through the UE that eNB inserts, MME need not comprise the MME pool information under the MME that this UE adheres in S1 message.

In the another kind of implementation of present embodiment; When MME becomes the MME that this UE adheres to for the first time; This MME can comprise the MMEpool information under the MME that this UE adheres in the S1 message of sending; The MME that always adheres to as MME as this UE, when not changing, this MME MME pool information under the MME that relevant this UE adheres to of can not redispatching.Particularly, for example in attach flow process or TAU flow process, UE is through a RN access network, and DeNB selects a MME for this UE, and a MME can tell the MME pool information under the RN MME that this UE adheres to through transmission S1 message; This UE changes Idle state into from connected state subsequently.At this UE again when Idle state changes connected state into; DeNB has selected a MME for this UE once more; Therefore a MME can send this S1 message, and for example: initial context is set up and selectively do not comprised the affiliated MME pool information of MME that this UE adheres in request (initial context setuprequest) message.When a RN receives S1 message; For example: initial context is set up request (initial context setuprequest) message but this initial context when setting up the MME pool information that does not comprise in the request message under the MME that this UE adheres to, and a RN just can think that it is exactly the affiliated MME pool information of MME that this UE adheres to that RRC that this UE sends connects the registeredMME information of carrying in foundation completion (RRC connection setup complete) message during eating dishes without rice or wine so.

In addition; Need to prove; When sending initial context foundation request (initial context setuprequest) message; When the transmit leg of this initial context foundation request (initial context setup request) message was MME, the MME pool information under the MME that UE adheres to can not filled out; But when the transmit leg of this initial context foundation request (initial context setup request) message was DeNB, the MME pool informational needs under the MME that UE adheres to was filled in.

Step 402, host site is sent S1 message to above-mentioned access node, comprises the affiliated MME pool information of MME that UE adheres in the S1 message that this host site is sent, and carries out the switching of this UE for this access node according to this MME pool information.

Fig. 5 is the flow chart of changing method embodiment five of the present invention, and as shown in Figure 5, this changing method can comprise:

Step 501, the host site of access node are that a plurality of UE in this access node coverage select identical MME or MME pool.

Wherein, above-mentioned a plurality of UE comprises the UE through this access node access network.

MME pool information under the MME that the sign of the MME that step 502, host site are adhered to above-mentioned a plurality of UE or above-mentioned a plurality of UE adhere to sends to this access node, switches according to sign or the MME pool information of this MME for this access node.

Particularly; Host site can be sent S1 message, X2 message, NAS message or RRC message and given access node, carries the MME pool information under the sign of the MME that above-mentioned a plurality of UE adheres to or the MME that above-mentioned a plurality of UE adhere in this S1 message, X2 message, NAS message or the RRC message.

Embodiment shown in Figure 5 is linked into the scene under the access node to UE through attach flow process or TAU flow process, and host site can be selected identical MME or identical MME pool for all UE under the same access node.Be RN below with the access node, host site is that DeNB is that example describes.

Particularly; When UE is linked into RN through attach flow process or TAU flow process; DeNB is that all UE under the same RN are when selecting identical MME or identical MME pool; DeNB can pass through S1 message, X2 message, NAS message or RRC message informing RN, the MME pool information under the sign MME that perhaps all UE adhered to of the MME that all UE adhered under this RN.

Wherein, the sign of the MME that all UE adhered to can be the GUMMEI of the MME that all UE adhered to; MME pool information under the MME that all UE adhered to can identify with the form of GUMMEI or GU Group ID.

Need to prove; When DeNB is that all UE under the RN are when selecting a MME or a MME pool; For switching the UE that comes from another eNB or the 2nd RN, if the UE of this switching adheres to before switching is the 2nd MME, the 2nd MME is different from the perhaps MME among the MMEpool of an above-mentioned MME; Then DeNB still can continue to use the 2nd MME for the UE of this switching, and at this moment a RN can pass through handoff request (Handover request; Hereinafter to be referred as: HO request) message is learnt the GUMMEI information of the 2nd MME, and the GUMMEI information that a RN preserves the 2nd MME gets final product.In this case, the UE on the RN, a part has the MME of oneself, and for example: the UE that above-mentioned switching is come still adheres to the MME before switching; Another part can use identical MME or MME pool.

Fig. 6 is the flow chart of changing method embodiment six of the present invention, and as shown in Figure 6, this changing method can comprise:

Step 601, the MME pool information under the MME that the UE in this access node coverage that the host site reception O&M system of access node sends adheres to.

In the present embodiment, above-mentioned O&M system can and safeguard (OperationAdministration and Maintenance for operation management; Hereinafter to be referred as: OAM) perhaps move and safeguard (Operationand Maintenance; Hereinafter to be referred as: O&M),, present embodiment describes but being example with OAM.

MME pool information under the MME that step 602, host site are adhered to the UE in the access node coverage sends to this access node, carries out the switching of UE for this access node according to this MME pool information.

MME pool information in the present embodiment can identify with the form of GUMMEI or GU Group ID.

In a kind of implementation of present embodiment; With the access node is RN; Host site is that DeNB is an example; As all UE of this RN during all attached to same MME or same MME pool, OAM can through DeNB for this RN the MME pool information under the MME that all UE of this RN adhere to is provided or the MME that adheres to for all UE of this RN of this RN renewal under MMEpool information.

The present invention's method that provides embodiment illustrated in fig. 6 can be sent the MME pool information under the MME that all UE of this RN adhere to through DeNB request OAM by RN when concrete the realization, OAM replys request; The MME pool information that also can be OAM under sending the MME that all UE of having carried this RN when certain message is given RN adhere to, RN can reply or not reply this message and confirm with table.

The MME pool information of mentioning among Fig. 1 of the present invention～embodiment illustrated in fig. 6 can identify with the form of GUMMEI or GU Group ID, and the form of index that can also MME pool identifies.Be RN below with the access node, host site is that DeNB is that example is elaborated.

In network design, DeNB can connect at least one MME pool, comprises at least one MME among the MME pool.DeNB sets up in flow process or base station configuration updating (eNBconfiguration update) flow process to the MME pool information under the RN transmission DeNB at X2; MME pool information under this DeNB comprises at least one MME pool information, and each MME pool specifically can identify by GU group ID.

MME pool information under the MME that UE under this RN coverage of DeNB transmission adheres to can be the index (index) of this MME pool.Because the MME that DeNB is the terminal to be selected is bound in certain MME pool that this DeNB adheres to, so DeNB can be through the index of MME pool, and the MME pool information under the MME that the UE under the RN coverage is adhered to sends to RN, and is as shown in table 3.

Table 3

GUMMEI index (GUMMEI index) or GU group ID index (GU group ID index) specifically please refer in real time in the table 2 are realized.

Need to prove that when DeNB told RN with the MME pool information of adjacent area, the mode of index that also can be through informing MME pool realized.Particularly; X2 at DeNB and RN sets up process; Perhaps in base station configuration updating (the eNB configuration update) process; The X2 that DeNB sends sets up in request (X2 setup request/response) message or base station configuration updating (eNB configurationupdate) message; Comprised the MME pool information that the neighbours base station of this DeNB is adhered to, this moment, the neighbours base station MME pool information of being adhered to of this DeNB also can be represented with the mode of the index of MME pool.

Index through MME pool transmits MME pool information, the interface-free resources of when having solved problem, also having saved signaling consumption and the Un interface of DeNB.

In the network design of Fig. 1 of the present invention～embodiment illustrated in fig. 6, the base station can connect at least one MME pool, can comprise at least one MME among the MME pool.

In junction network, a plurality of RN under DeNB are the same with DeNB, adhere to identical MME pools.For example: DeNB belongs to MME pool1, MME pool2 and MME pool3, and the RN under this DeNB also belongs to this 3 MME pools so.For instance, if comprise 3 RN, i.e. RN1, RN2 and RN3 under this DeNB; When DeNB belongs to MME pool1, MME pool2 and MME pool3; RN1, RN2 and RN3 also belong to these 3 MMEpool (each via node is connected 3 MME pool respectively in other words) respectively; If the terminal UE 1 of RN1 switches under the RN2 thus; Because the MME one that UE1 adhered to fixes among these 3 MME pool, and destination node RN2 also belongs to this 3 MME pool, so the MME that UE1 adheres to is in the MME of destination node RN2 pools.So in the intrasystem UE of this DeNB switched, RN can directly initiate the X2 switching for the UE in this RN coverage need not judge whether to initiate S1 switching or X2 switching.The intrasystem UE of this DeNB switches, and can be that the UE in the RN1 coverage switches to DeNB, RN2 or RN3 from RN1; Perhaps can be to switch to RN1, RN2 or RN3 etc. from DeNB.

In addition; In junction network; When DeNB belongs to MME pool1, MME pool2 and MMEpool3; Can the neighbours base station of DeNB also be deployed to so and belong to MME pool1, MMEpool2 and MME pool3, when the UE in the RN coverage that connects of this DeNB switched so, RN can directly initiate X2 and switch and need not judge whether to initiate that S1 switches or X2 switches.

Among Fig. 1 of the present invention～embodiment illustrated in fig. 6; Access node can also receive the service mobility management entity tabulation (served MME list) that host site is sent; The title and/or the sign that comprise the MME that the UE in this access node coverage adheres in this service mobility management entity tabulation; Make access node to confirm other MME pool under the MME according to the title of this MME and/or sign and MME pool information; Be that same MME has different titles and/or sign in different MME pool, access node can obtain these different titles and/or signs.For example: suppose that a MME has 2 titles such as GUMMEI 1 and GUMMEI 2; Respectively to should the title of MME in pool1 and pool2; Learn the title GUMMEI 1 of this MME when access node; Promptly obtain the information of the pool1 under this MME, in like manner access node can be judged this MME and belongs to pool2 equally according to the title GUMMEI 2 of this MME.This is because in order accurately to carry out switch decision, access node is known MME all titles in network system that this access node adheres to.With the access node is RN, and host site is that DeNB is an example: when the UE in the RN coverage carried out the S1/X2 switch decision, RN can obtain the affiliated MME pool information of MME that this UE adheres to, for example: GUMMEI or GU Group ID.And RN is as a website, and its appended MME pool is limited, and for example attached among pool2 and the pool3, but the appended MME of this RN maybe can also be in other pool, in pool1; And this information, RN can set up (S1 setup) flow process through S1 and just can know.If RN does not know all name informations of concrete certain MME, possibly can there be error in this RN when carrying out the S1/X2 switch decision.For example: the MME that certain UE in the RN coverage adheres to is designated GUMMEI2, and the GUgroup ID that this MME is corresponding is pool2, and the name of this MME in pool1 is called GUMMEI1 simultaneously.The appended MME pool of neighbours' target eNB is pool1 and pool3.Only according to GUMMEI2, and appended MME pool information pool1 and the pool3 of neighbours' target eNB, RN can think that MME that this UE adheres to not in the appended MME pool of neighbours' target eNB, therefore carries out S1 with judgement and switches.But in fact the MME at this terminal is also in pool1, and therefore in fact RN can adjudicate and carries out X2 and switch.

In sum; In order accurately to carry out switch decision; RN knows all titles and/or the sign of MME in network system that the UE in this RN coverage adheres to; Thereby accurately judge the MME pool under the MME that this UE adheres to, thereby can know whether MME that this UE adheres to has with the switching target website is connected.

Particularly; In order to make RN know all titles and/or the sign of MME in network system that the UE in this RN coverage adheres to; In Fig. 1 of the present invention～embodiment illustrated in fig. 6; DeNB sends to the MME pool information under the MME that the UE in this RN coverage of RN adheres to; Can especially, can also be all titles and/or the sign of this MME in network system for the sign GUMMEI of this MME, sign GU group ID or the index of MME pool etc. of MME pool under this MME.For instance, suppose that the MME1 that UE1 adheres to belongs to MME pool1, MME pool2 and MME pool3, the MME pool information under the MME1 that adheres to of the UE1 in this RN coverage can be GUMMEI1, GUMMEI2 and GUMMEI3 so; Perhaps, this MME pool information can be GU groupID1, GU group ID 2 and GU group ID 3; Perhaps, this MME pool information can be MMEpool1, MME pool2 and MME pool3; Perhaps, this MME pool information can be GU group IDindex 1, GU group ID index 2 and GU group ID index 3.

Perhaps; In order to make RN know all titles and/or the sign of MME in network system that the UE in this RN coverage adheres to, DeNB can upgrade (MME transfer update) message through S1 foundation response (S1 setup response) message or MME transmission provides a servedMME list to RN.Particularly, S1 sets up that (S1 setup) flow process is used for the base station and MME carries out the foundation of S1 interface; The MME transmission is upgraded (MME transfer update) flow process and is used for certain MME provides MME information from renewal to the base station.

In the embodiment of the invention, S1 sets up the form that responds (S1 setup response) message can be as shown in table 4, and the form of MME transmission renewal (MME transfer update) message can be as shown in table 5.

Wherein, the tabulation of the service GUMMEI in table 4 and the table 5 (Served GUMMEIs list) list item is the newly-increased list item of the embodiment of the invention.

Service GUMMEI tabulation (Served GUMMEIs list) list item in table 4 and the table 5 can be represented the MME pool information of a plurality of or all MME that RN is connected.To the MME pool information of each MME, can comprise all titles and/or the sign of this MME especially.

Table 4

Table 5

Range boundary in embodiment of the invention table 1～table 5 " maxnoofMMEs " is meant the maximum number of the MME that each eNB, DeNB or RN adhere to.

In addition, can only comprise service PLMN (Served PLMNs), service groups sign (Served Group IDs) or serving MME Cs sign indicating number (Served MMECs) in service GUMMEI (Served GUMMEIs) list item.

Perhaps serve service groups sign (Served Group IDs) or the serving MME sign indicating number (Served MMECs) that can also only comprise in GUMMEI (Served GUMMEIs) list item under certain service PLMN (Served PLMNs) and this service PLMN (Served PLMNs) item.Perhaps serve in GUMMEI (Served GUMMEIs) list item false information can also be provided, the service groups sign under certain false service PLMN (Served PLMNs) and this falseness service PLMN (ServedPLMNs) (Served Group IDs) or serving MME sign indicating number (ServedMMECs) for example are provided.RN just symbolically obtains all name informations of certain MME from DeNB like this, but RN can obtain all name informations of the MME that UE adhered in this RN coverage from other modes.For example; Through the method among Fig. 1 of the present invention～embodiment illustrated in fig. 6; Obtain all titles or the sign of the MME that above-mentioned UE adheres to, for instance, all titles of the MME1 that the UE1 in this RN coverage adheres to or sign can be GUMMEI1, GUMMEI2 and GUMMEI3; Perhaps, all titles of this MME1 or sign can be GU group ID1, GU group ID 2 and GU group ID 3; Perhaps, all titles of this MME1 or sign can be MME pool1, MME pool2 and MME pool3; Perhaps, all titles of this MME1 or sign can be GU group ID index 1, GU group ID index 2 and GU group IDindex 3.

Especially, RN can obtain the affiliated MME pool information of MME that the UE in this RN coverage adheres to through Fig. 1 of the present invention～method that provides embodiment illustrated in fig. 6.With MME1 is example, supposes that RN has obtained the sign GUMMEI1 of MME1.Upgrade (MME transfer update) message or other message through S1 setup response message or MME transmission in addition; This RN obtains a plurality of or all titles or the sign of all MME that this RN adhered to or connected; RN can be known this MME1 except in pool1, also in pool2 and pool3 according to other titles of the corresponding MME of GUMME1 and this GUMME1 thus; Thus when RN need carry out the switching type judgement for the UE in this RN coverage; This RN is the MME pools (for example: pool2 and pool4) that adheres to of the MME pool (for example: pool1, pool2 and pool3) under the MME that adheres to of this UE and targeted sites more once, whether common factor is arranged, if common factor is arranged; When this UE switches to targeted sites in the meaning so, need not change MME.If also there is the X2 interface that can switch between RN or DeNB and the targeted sites, RN can initiate the X2 switching so.

Junction network in the embodiment of the invention can provide all names of all MME that DeNB or RN adhere to RN.Owing to have only a S1 interface between RN and the DeNB, therefore all names of all MME that the above-mentioned DeNB of providing or RN adhered to can be for once to the flow process of RN, rather than repeatedly.

The changing method that the embodiment of the invention provides goes for the switching between HeNB and the eNB equally, and Fig. 7 has disposed the sketch map of the embodiment of the LTE network architecture of HeNB for the present invention.In the prior art, only support to switch based on (S1-based) of S1 interface for the switching between the eNB in the HeNB system and the switching between the HeNB and HeNB and the HeNB.But at present third generation partner program (3rd-Generation Partnership Project; Hereinafter to be referred as: 3GPP) proposed in the standard actions setting up X2 interface between the HeNB and between HeNB and the HeNB GW, thereby in the HeNB system based on the possibility that is switching to of X2 interface.In this case; Concerning HeNB, also existing is to initiate the switching type decision problem that X2 switches or initiate the S1 switching, if do not change the decision mechanism of existing switching type; The changing method that then embodiment of the invention provided is applicable to the HeNB system too; Except the entity difference of using, entrained content and message format in the message is consistent with the method that provides in the embodiment of the invention.

The changing method that the embodiment of the invention provides is equally applicable to the E-UTRAN network architecture of a kind of HeNB of deployment in the 3GPP agreement.In this network architecture, as UE from present located HeNB1 to other target access nodes, when for example eNB1 switched, HeNB1 carried out the switching type judgement.The changing method that the embodiment of the invention provides is equally applicable to HeNB1 and obtains the required information of switching type judgement of carrying out, and confirms to carry out S1 switching or X2 switching according to the information of obtaining.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.

Fig. 8 is the structural representation of access node embodiment one of the present invention; Access node in the present embodiment can be realized the flow process that the present invention is embodiment illustrated in fig. 1; As shown in Figure 8, this access node can comprise:request module 81,receiver module 82 andhandover module 83;

Wherein,request module 81 is used for the MME pool information under the MME that the UE in this access node coverage of host site request of access node adheres to; Particularly;Request module 81 can be sent S1 message, X2 message, NAS message or RRC message to the host site of access node, and the request of carrying in this S1 message, X2 message, NAS message or the RRC message obtains the indication information of the MME pool information under the MME that the UE in this access node coverage adheres to.

Receiver module 82 is used to receive the MMEpool information under the MME that this UE that host site sends adheres to; Particularly,receiver module 82 can receive that host site sends the MME that adheres to from this UE under MME pool information; This MME pool information is that the MME that UE adheres to is sent to this host site after the message of the request acquisition MME pool information that receives the host site transmission.

In a kind of implementation of present embodiment;Receiver module 82 can also be worked as and carried registeredMME information in the RRC message; And host site is MME that UE selects when not being the MME of this registeredMME message identification, receives this host site that host site sends and be the MME pool information under the MME that UE selects.

In the another kind of implementation of present embodiment;Receiver module 82 can also receive the service mobility management entity tabulation (served MME list) that host site is sent, and comprises all titles and/or the sign of the MME that the UE in the access node coverage adheres in this service mobility management entity tabulation.

Handover module 83 is used for carrying out the switching of UE according to this MME pool information; Particularly,handover module 83 can be confirmed the switching type of UE according to this MME pool information, and this UE is carried out the corresponding switching of this switching type.

In the above-mentioned access node; MME pool information under the MME that requestmodule 81 can be adhered to the UE in this access node coverage of host site request of this access node;Receiver module 82 can receive the MME pool information under the MME that the UE in this access node coverage that host site sends adheres to then; Thereby realized the affiliated MME pool information of MME that required UE adhered to when access node obtained to carry out the switching type judgement; Improve the accuracy of switching type judgement, guaranteed carrying out smoothly of switching.

Fig. 9 is the structural representation of host site embodiment one of the present invention, and the host site in the present embodiment can realize the flow process that the present invention is embodiment illustrated in fig. 4.As shown in Figure 9, this host site can comprise: themessage sink module 91 and first sendingmodule 92.

Wherein,message sink module 91 is used to receive the S1 message that MME that the UE in the access node coverage that host site connects adheres to sends; In the present embodiment, comprise the affiliated MME pool information of MME that this UE adheres in the S1 message thatmessage sink module 91 receives.

First sendingmodule 92 is used for sending S1 message to access node, comprises the affiliated MME pool information of MME that above-mentioned UE adheres in the S1 message that this first sendingmodule 92 sends, and carries out the switching of UE for access node according to this MME pool information.

In the present embodiment;First sending module 92; Can also send service mobility management entity tabulation (served MME list) to access node, comprise all titles and/or the sign of the MME that the UE in the access node coverage adheres in this service mobility management entity tabulation.

Through above-mentioned host site, the MME pool information under the MME that required UE adhered to when access node can obtain to carry out the switching type judgement has improved the accuracy of switching type judgement, has guaranteed carrying out smoothly of switching.

Figure 10 is the structural representation of host site embodiment two of the present invention, and the host site in the present embodiment can realize the flow process that the present invention is embodiment illustrated in fig. 5, and is shown in figure 10, and this host site can comprise: select themodule 1001 andsecond sending module 1002.

Wherein,select module 1001, be used to interior identical MME or the MME pool of a plurality of UE selections of access node coverage that host site connects; A plurality of UE in the present embodiment comprise the UE through this access node access network.

Second sending module 1002, the MME pool information under the MME that the sign of the MME that is used for a plurality of UE are adhered to or a plurality of UE adhere to sends to access node, switches according to sign or the MME pool information of this MME for this access node.Particularly; In the present embodiment;Second sending module 1002 can send S1 message, X2 message, NAS message or RRC message and give access node, carries the MME pool information under the sign of the MME that above-mentioned a plurality of UE adheres to or the MME that a plurality of UE adhere in this S1 message, X2 message, NAS message or the RRC message.

In the present embodiment;Second sending module 1002; Can also send service mobility management entity tabulation (served MME list) to access node, comprise all titles and/or the sign of the MME that the UE in this access node coverage adheres in this service mobility management entity tabulation.

Figure 11 is the structural representation of host site embodiment three of the present invention; Host site in the present embodiment can realize the flow process that the present invention is embodiment illustrated in fig. 6; Shown in figure 11, this host site can comprise:information receiving module 1101 and the3rd sending module 1102;

Wherein,information receiving module 1101 is used to receive the MME pool information under the MME that the UE in the access node coverage that host site that the O&M system sends connects adheres to; Wherein, this O&M system can be OAM or O&M, and present embodiment is that example describes with OAM;

The3rd sending module 1102, the MME pool information under the MME that is used for the UE in this access node coverage is adhered to sends to access node, carries out the switching of UE for this access node according to this mobile management entity pond information.

In the present embodiment; The3rd sending module 1102 also sends service mobility management entity tabulation (served MME list) to access node, comprises all titles and/or the sign of the MME that the UE in the access node coverage adheres in this service mobility management entity tabulation.

It will be appreciated by those skilled in the art that accompanying drawing is the sketch map of a preferred embodiment, module in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.

What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, 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 put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.It will be understood by those skilled in the art that the foregoing description can interosculate under situation about not clashing.For example; Access node can be known a plurality of titles and/or the sign of MME; When which a MME pool under access node is learnt this MME is; Can be according to a plurality of titles of this MME and/or other MME pool under definite this MME of sign, this technological means is applicable to each embodiment of the present invention.