WO2017080267A1

WO2017080267A1 - Method and device for acquiring globally unique mobility management entity identifier

Info

Publication number: WO2017080267A1
Application number: PCT/CN2016/094230
Authority: WO
Inventors: 张燕
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-11-10
Filing date: 2016-08-09
Publication date: 2017-05-18
Also published as: CN106686667A

Abstract

A method and device for acquiring a globally unique mobility management entity identifier. The method comprises: receiving an S1 interface establishment request message sent by a home evolved Node-B (HeNB); modifying served globally unique mobility management entity identifiers (served GUMMEIs) in an S1 interface establishment response message to be sent; and sending the S1 interface establishment response message carrying the modified served GUMMEIs to the HeNB to establish an S1 interface with the HeNB, wherein the S1 interface establishment response message sent comprises one or more array elements, and each array element corresponds uniquely to GUMMEI information of one MME.

Description

Method and device for acquiring global unique mobile management entity identifier

Technical field

This application relates to, but is not limited to, the field of wireless communication technology.

Background technique

In the field of the wireless communication in the related art, the demand for the distributed network of the Home evolved Node Base (HeNB) is also increasing on the basis of the planning of the original large base station (for example, the macro station). The distributed network of HeNBs has gradually become an indispensable supplement in planning networking.

The HeNB distributed networking has the advantages of fast and convenient base station construction and increased user experience, but there are also some problems. For the HeNB to which the home base station gateway is connected to the S1 interface, the home base station gateway may block some information of the Mobility Management Entity (MME), which is mainly a Globally Unique MME Identifier (referred to as: GUMMEI) information, which affects functions such as handover and access, wherein the GUMMEI includes a Public Land Mobile Network (PLMN) identification (ie, a PLMN ID) and a mobility management entity group identifier ( MME Group ID and MME Code, and the protocol defines that the first element in Served GUMMEIs is the GUMMEI information associated with Long Term Evolution (LTE); the definition of GUMMEI in other places. Both are included in the permutation combination of the three lists formed by the above PLMN ID, MME Group ID, and MME Code. For example, the GUMMEI information carried by the user equipment (User Equipment, UE) is matched, and the PLMN ID, the MME Group ID, and the MME Code are matched with an MME of the base station S1 interface link.

In the scenario where the HeNB distributed networking has a home base station gateway network, as shown in FIG. 3, it is a schematic diagram of a network architecture of a home base station gateway connecting multiple MMEs, and multiple MMEs in FIG. 3 (ie, MME A and MME) B) The supported PLMN and the group identity (Group Identity, group: ID) are different. The home base station gateway obtains the GUMMEI information of MME A and MME B when establishing the S1 interface connection between the home base station gateway and the MME A. Since all the S1 interfaces in the related art establish a connection process, the acquired GUMMEI information is obtained by arranging and combining the elements therein, of course, in the HeNB. When the S1 interface is established with the home base station gateway, the acquired GUMMEI information is also obtained by arranging and combining. The cell format of the Served GUMMEIs in the related art is shown in Table 1, where Served GUMMEIs is an array element, and the array element is One or more GUMMEI information may be combined. The serving PLMNs may include a service PLMN ID of one or more MMEs. The service Group IDs may also include one or more MME Group IDs, and the service MMECs may also include one. Or MME code of multiple MMEs.

Table 1

The manner of obtaining the GUMMEI information and Table 1 can be seen that when the GUMMEI information of the MME A is the PLMN (46001), the Group Id (1), the MMEC (1), and the GUMMEI information of the MME B is the PLMN (46002), the Group Id ( 2) When MMEC(2); 2 GUMMEI information can be identified at the home base station gateway, ie (46001, 1, 1) and (46002, 2, 2); or 2 GU Group IDs can be identified, ie (46001, 1) and (46002, 2), but when the home base station gateway is transmitted to the HeNB, it can only be carried as: PLMN (46001, 46002) Group ID (1, 2) due to the limitation of the S1 interface setup response message structure. ) MMEC (1, 2), then the GUMMEI information at the HeNB can be identified as (46001, 1, 1) (46001, 1, 2) (46001, 2, 1) (46001, 2, 2) (46002, 1, 1) ) (46002, 1, 2) (46002, 2, 1) (46002, 2, 2), thereby generating 6 GUMMEI information that does not actually exist. The same is true for the GU Group ID, which can be identified as (46001, 1) (46001, 2) (46002, 1) (46002, 2), resulting in 2 GU Group IDs that do not actually exist.

Based on the manner in which the home base station gateway identifies the GUMMEI information or the GU Group ID, the target base station may obtain the GUMMEI information carried by the source base station, and perform the S1 interface routing according to the GUMMEI information, but the source base station carries The GUMMEI information may be inaccurate, resulting in unsuccessful routing and failure of X2 interface switching.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The present invention provides a method and a device for obtaining a globally unique mobility management entity identifier, which is to solve the problem that the handover of the X2 interface between the base stations may fail in the scenario of the home base station gateway networking in the related art, so that the gateway at the home base station is implemented. The Served GUMMEIs of different S1 interfaces are split, and the HeNB generates valid GUMMEI information according to multiple Served GUMMEIs elements, which improves the success rate of X2 interface switching between the HeNB and other base stations.

A method of obtaining a globally unique mobile management entity identity, including:

Receiving an S1 interface setup request message sent by the HeNB;

Modifying the service group globally unique mobility management entity identifier Served GUMMEIs in the S1 interface setup response message to be sent;

Sending, by the HeNB, an S1 interface setup response message carrying the modified Served GUMMEIs, to establish an S1 interface with the HeNB;

The sent S1 interface setup response message includes one or more array elements, and each of the array elements uniquely corresponds to the GUMMEI information of one mobility management entity MME.

Optionally, each of the array elements in the Served GUMMEIs includes: a public land mobile network identifier PLMN ID sub-element, a mobility management entity group identifier MME Group ID sub-element, a mobility management entity code MME Code sub-element, and a core network. Type CN Type child element;

The PLMN ID sub-element includes the PLMN ID of the GUMMEI information corresponding to the current array element; the MME Group ID sub-element includes the MME Group ID of the GUMMEI information corresponding to the array element; the MME Code sub-element includes the array of the group The MME Code of the GUMMEI information corresponding to the element; the CN Type sub-element includes the CN Type of the GUMMEI information corresponding to the array element of the group.

Optionally, before the receiving the S1 interface setup request message sent by the home eNodeB HeNB, the method further includes:

The S1 interface setup response message sent by the multiple MMEs is received, and the GUMMEI information of the corresponding MME is obtained from each of the S1 interface setup response messages.

An apparatus for obtaining a globally unique mobility management entity identifier is applied to a home base station gateway, and the apparatus includes:

The receiving module is configured to: receive an S1 interface setup request message sent by the home evolved base station HeNB;

The modification module is configured to: modify the service group globally unique mobility management entity identifier Served GUMMEIs in the S1 interface setup response message to be sent;

The response module is configured to: send an S1 interface setup response message carrying the modified Served GUMMEIs of the modification module to the HeNB, to establish an S1 interface with the HeNB;

The PLMN ID sub-element includes the PLMN ID of the GUMMEI information corresponding to the current array element; the MME Group ID sub-element includes the MME Group ID of the GUMMEI information corresponding to the array element; the MME Code sub-element includes the array of the group Element corresponding to GUMMEI The MME Code of the information; the CN Type sub-element includes the CN Type of the GUMMEI information corresponding to the array element of the group.

Optionally, the device further includes:

And an acquiring module, configured to: before the receiving module receives the S1 interface setup request message sent by the HeNB, receive an S1 interface setup response message sent by multiple MMEs, respectively, from each of the S1 interface setup response messages Obtaining the GUMMEI information of the corresponding MME.

The method and device for obtaining the global unique mobility management entity identifier provided by the embodiment of the present invention, by modifying the Served GUMMEIs cell carried in the message, so that each array element in the S1 interface setup response message uniquely corresponds to one GUMMEI information, The Served GUMMEIs of different S1 interfaces are split under the home base station gateway, so that the HeNB generates valid GUMMEI information according to multiple Served GUMMEIs elements, thereby improving the success rate of X2 interface switching between the HeNB and other base stations.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

FIG. 1 is a flowchart of a method for obtaining a global unique mobility management entity identifier according to an embodiment of the present invention;

2 is a schematic structural diagram of an apparatus for acquiring a globally unique mobility management entity identifier according to an embodiment of the present invention;

3 is a schematic diagram of a network architecture of a home base station gateway connecting multiple MMEs;

FIG. 4 is a flowchart of another method for obtaining a globally unique mobility management entity identifier according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another apparatus for acquiring a globally unique mobility management entity identifier according to an embodiment of the present invention;

FIG. 6 is a flowchart of establishing an S1 interface between a home base station gateway and a HeNB in a method for acquiring a globally unique mobility management entity identifier according to an embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments herein may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system in accordance with a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

The present invention is directed to the problem that the handover of the X2 interface between the base stations fails in the scenario of the home base station gateway networking in the related art, and provides a method for obtaining the global unique mobility management entity identifier by using the Served GUMMEIs cell carried in the message. The modification implements splitting of the Served GUMMEIs of different S1 interfaces under the home base station gateway, and the HeNB generates valid GUMMEI information according to the plurality of Served GUMMEIs elements, thereby improving the success rate of X2 interface switching between the HeNB and other base stations.

FIG. 1 is a flowchart of a method for obtaining a globally unique mobility management entity identifier according to an embodiment of the present invention. The method provided in this embodiment may include the following steps, that is, steps 11 to 13:

Step 11: Receive an S1 interface setup request message sent by the HeNB.

Step 12: modify the service group global unique mobility management entity identifier (Served GUMMEIs) in the S1 interface setup response message to be sent;

Step 13: Send an S1 interface setup response message carrying the modified Served GUMMEIs to the HeNB to establish an S1 interface with the HeNB.

The S1 interface setup response message sent in the embodiment of the present invention includes one or more array elements, and each array element uniquely corresponds to the GUMMEI information of one MME.

The method for obtaining the global unique mobility management entity identifier provided by the embodiment of the present invention, by modifying the Served GUMMEIs cell carried in the response message of the S1 interface, so that each array element included in the S1 interface establishment response message uniquely corresponds to one GUMMEI. The information is implemented to split the Served GUMMEIs of the different S1 interfaces under the home base station gateway, so that the HeNB generates valid GUMMEI information according to the multiple Served GUMMEIs elements, thereby improving the success rate of the X2 interface switching between the HeNB and other base stations.

Optionally, in the embodiment of the present invention, each array element in the foregoing Served GUMMEIs includes: a Public Land Mobile Network Identity (PLMN ID) sub-element, a Mobile Management Entity Group Identity (MME Group ID) sub-element, and a mobility management entity. Encoding (MME Code) sub-element and core network (Core Network, referred to as: CN) type (CN Type) sub-element.

The PLMN ID sub-element includes the PLMN ID of the GUMMEI information corresponding to the current array element; the MME Group ID sub-element includes the MME Group ID of the GUMMEI information corresponding to the array element; and the MME code sub-element includes the GUMMEI information corresponding to the array element of the group. The MME Code; CN Type sub-element includes the CN Type of the GUMMEI information corresponding to the array element of the group.

In the embodiment of the present invention, the composition content of the GUMMEI information may be as shown in Table 2:

IE/Group NameIE/Group Name	PresencePresence	RangeRange	IE type and referenceIE type and reference	Semantics descriptionSemantics description
GUMMEIGUMMEI
>PLMN Identity>PLMN Identity	MM		9.2.3.89.2.3.8
>MME Group ID>MME Group ID	MM		OCTET STRING(2)OCTET STRING(2)
>MME Code>MME Code	MM		9.2.3.129.2.3.12

Table 2

In the embodiment of the present invention, the composition content of the GU Group ID can be as shown in Table 3:

table 3

In the embodiment of the present invention, the cell format of Served GUMMEIs can be as shown in Table 4:

Table 4

Optionally, FIG. 4 is a flowchart of another method for obtaining a globally unique mobility management entity identifier according to an embodiment of the present invention. On the basis of the embodiment shown in FIG. 1 , before the step 11 in this embodiment, the method may further include:

Step 10: Receive an S1 interface setup response message sent by multiple MMEs, and obtain the GUMMEI information of the corresponding MME from each S1 interface setup response message.

Optionally, in the embodiment of the present invention, before performing step 10, that is, before receiving the S1 interface setup response message sent by multiple MMEs, the method further includes: sending an S1 interface setup request message to multiple MMEs, and each MME is configured according to The received S1 interface setup request message is sent to the home base station gateway with the GUMMEI information corresponding to the MME.

The method for obtaining the global unique mobility management entity identifier provided by the embodiment of the present invention may complete the handover of the X2 interface between the HeNBs according to the Served GUMMEIs carried in the response message of the S1 interface.

In the embodiment of the present invention, due to the modification of the Served GUMMEIs cell, each array element in the S1 interface setup response message uniquely corresponds to one GUMMEI information, which can improve the success rate of X2 interface switching between the source HeNB and the target HeNB.

The following describes the processing procedure of the X2 interface switching between the source HeNB and the target HeNB for the modification of the Served GUMMEIs cell. The implementation method includes the following steps, namely, S01 to S04:

S01. The source HeNB sends a handover request message carrying the GUMMEI information to the target HeNB.

The handover request message carries the GUMMEI information of the MME to which the active HeNB belongs, and the GUMMEI information is obtained from the S1 interface response message returned by the home base station gateway when the S1 interface is established with the home base station gateway; the GUMMEI information is valid. The absence of GUMMEI information no longer occurs due to the modification of the Served GUMMEIs cell format.

S02. The target HeNB performs S1 interface routing according to the GUMMEI information, and sends the path to the source HeNB. Switching request confirmation message;

In actual application, the target HeNB selects the route to the serving MME to which the source HeNB is connected according to the GUMMEI information provided by the source HeNB, because the modification of the Served GUMMEIs cell makes each array element uniquely corresponding. A GUMMEI information, so the established S1 interface routing path is real, thereby improving the success rate of X2 interface switching between the source HeNB and the target HeNB.

S03. The target HeNB sends a path switch request message to the MME connected to the target HeNB by using the home base station gateway.

In this embodiment, the sent path switch request message is used to request the MME to update the node address of the service data channel, and notify the MME to switch the connection path of the service data.

S04. The serving MME of the target HeNB sends a path switch request acknowledgement message to the target HeNB.

The method for obtaining the global unique mobility management entity identifier in the embodiment of the present invention, by modifying the Served GUMMEIs cell carried in the response message of the S1 interface, so that each array element uniquely corresponds to one GUMMEI, and the home base station gateway is different to different S1. The Served GUMMEIs of the interface is split. The HeNB generates valid GUMMEI information according to multiple Served GUMMEIs elements, which improves the success rate of X2 interface switching between the HeNB and other base stations.

FIG. 2 is a schematic structural diagram of an apparatus for acquiring a globally unique mobility management entity identifier according to an embodiment of the present invention. The apparatus provided in this embodiment may include:

The receiving module 21 is configured to: receive an S1 interface setup request message sent by the HeNB;

The modifying module 22 is configured to: modify the Served GUMMEIs in the S1 interface setup response message to be sent;

The response module 23 is configured to: send an S1 interface setup response message carrying the modified Served GUMMEIs of the modification module 22 to the HeNB, to establish an S1 interface with the HeNB;

Optionally, in the embodiment of the present invention, each array element in the foregoing Served GUMMEIs includes: a Public Land Mobile Network Identity (PLMN ID) sub-element, and a mobility management entity group identifier (MME). Group ID) Sub-element, Mobile Management Entity Encoding (MME Code) sub-element and Core Type (CN Type) sub-element.

The PLMN ID sub-element includes the PLMN ID of the GUMMEI information corresponding to the current array element; the MME Group ID sub-element includes the MME Group ID of the GUMMEI information corresponding to the array element; and the MME code sub-element includes the GUMMEI information corresponding to the array element of the group. The MME Code; CN Type sub-element includes the CN Type of the GUMMEI information corresponding to the array element of the group. In the embodiment of the present invention, the composition content of the GUMMEI information may be as shown in Table 2. The composition content of the GU Group ID may be as shown in Table 3. The cell format of the Served GUMMEIs may be as shown in Table 4.

Optionally, FIG. 5 is a schematic structural diagram of another apparatus for acquiring a globally unique mobility management entity identifier according to an embodiment of the present invention. Based on the structure of the device shown in FIG. 2, the device provided in this embodiment may further include:

The obtaining module 24 is configured to: before receiving the S1 interface setup request message sent by the HeNB, the receiving module 21 receives the S1 interface setup response message sent by the multiple MMEs, and obtains the GUMMEI information of the corresponding MME from each S1 interface setup response message. .

Optionally, in the embodiment of the present invention, before receiving the S1 interface setup response message sent by the multiple MMEs, the acquiring module 23 is further configured to: send an S1 interface setup request message to multiple MMEs, and each MME according to the MME The received S1 interface setup request message is sent to the home base station gateway with the GUMMEI information corresponding to the MME.

The processing flow of the X2 interface switching between the source HeNB and the target HeNB after the modification of the Served GUMMEIs cell is exemplified in the foregoing embodiment, and details are not described herein again.

The apparatus for obtaining the global unique mobility management entity identifier provided by the embodiment of the present invention, by modifying the Served GUMMEIs cell carried in the response message of the S1 interface, so that each array element in the S1 interface establishment response message uniquely corresponds to one GUMMEI information. The Served GUMMEIs of the different S1 interfaces are split under the home base station gateway, and the HeNB generates valid GUMMEI information according to the multiple Served GUMMEIs elements, thereby improving the success rate of the X2 interface switching between the HeNB and other base stations.

As shown in FIG. 6, the method for obtaining the global unique mobility management entity identifier provided by the embodiment of the present invention is shown. A flow chart of establishing an S1 interface between a home base station gateway and a HeNB.

The workflow of the S1 interface establishment is described in detail below in conjunction with the schematic diagram. The implementation manner may include the following steps, that is, steps 21 to 22:

Step 21: The HeNB sends an S1 interface setup request message to the home base station gateway.

In this embodiment, the S1 interface setup request message carries information such as a HeNB identifier, a HeNB name, and a supported PLMN and a Tracking Area Code (TAC). In practical applications, the PLMN is combined with the TAC. The Tracking Area Identity (TAI) is used to learn the tracking area where the user equipment (UE) is located in the core network.

Step 22: The Served GUMMEIs in the S1 interface setup response message to be sent by the home base station gateway is modified.

Step 23: The home base station gateway sends an S1 interface setup response message to the HeNB.

In this embodiment, the home base station gateway accepts the S1 interface link according to the information carried in the received S1 interface setup request message, and the S1 interface setup response message carries the MME corresponding to the S1 interface connected to the home base station gateway. The GUMMEI information is used by the HeNB to perform an S1 interface routing operation.

Therefore, the GUMMEI information saved in the HeNB is derived from the Served GUMMEIs in the S1 interface response message, and the Served GUMMEIs cell is modified so that each array element in the S1 interface response message uniquely corresponds to one GUMMEI information, thereby making the HeNB The obtained GUMMEI information is valid.

In the embodiment of the present invention, the Served GUMMEIs cell carried in the response message of the S1 interface is modified, so that each array element uniquely corresponds to one GUMMEI, and the Served GUMMEIs of different S1 interfaces are split under the home base station gateway, and the HeNB is based on multiple The Served GUMMEIs element generates valid GUMMEI information.

In the actual application, in addition to the inter-base station handover procedure, other processes related to the GUMMEI information, for example, the GUMMEI information that is optionally carried when the UE accesses, the GU Group ID List that the current HeNB belongs to when the X2 interface is established, and The S1 interface can optionally carry the GUMMEI information. The signaling flow is of course not limited to the above-mentioned example. The GUMMEI information obtained in the modified Served GUMMEIs or the GU Group ID format can be used. All It is effective to reduce the invalid GUMMEI information during the signaling interaction process, thereby reducing the failure rate of the processing flow.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium on a corresponding hardware platform (according to The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

In the embodiment of the present invention, by modifying the Served GUMMEIs cell carried in the message, each array element in the S1 interface setup response message uniquely corresponds to one GUMMEI information, and the Served GUMMEIs split of different S1 interfaces under the home base station gateway is implemented. Therefore, the HeNB generates valid GUMMEI information according to the plurality of Served GUMMEIs elements, and improves the success rate of X2 interface switching between the HeNB and other base stations.

Claims

A method for obtaining a globally unique mobility management entity identifier is applied to a home base station gateway, and the method includes:

Receiving an S1 interface setup request message sent by the home evolved base station HeNB;

Modifying the service group globally unique mobility management entity identifier Served GUMMEIs in the S1 interface setup response message to be sent;

Sending, by the HeNB, an S1 interface setup response message carrying the modified Served GUMMEIs, to establish an S1 interface with the HeNB;

The sent S1 interface setup response message includes one or more array elements, and each of the array elements uniquely corresponds to the GUMMEI information of one mobility management entity MME.
The method for obtaining a globally unique mobility management entity identity according to claim 1, wherein each of said array elements in said Served GUMMEIs comprises: a public land mobile network identity PLMN ID sub-element, a mobility management entity group identity MME Group The ID sub-element, the mobility management entity encodes the MME Code sub-element and the core network type CN Type sub-element;

The PLMN ID sub-element includes the PLMN ID of the GUMMEI information corresponding to the current array element; the MME Group ID sub-element includes the MME Group ID of the GUMMEI information corresponding to the array element; the MME Code sub-element includes the array of the group The MME Code of the GUMMEI information corresponding to the element; the CN Type sub-element includes the CN Type of the GUMMEI information corresponding to the array element of the group.
The method for obtaining a globally unique mobility management entity identifier according to claim 1 or 2, wherein before the receiving the S1 interface setup request message sent by the home evolved base station HeNB, the method further includes:

The S1 interface setup response message sent by the multiple MMEs is received, and the GUMMEI information of the corresponding MME is obtained from each of the S1 interface setup response messages.
An apparatus for obtaining a globally unique mobility management entity identifier is applied to a home base station gateway, and the apparatus includes:

The receiving module is configured to: receive an S1 interface setup request message sent by the home evolved base station HeNB;

The modification module is configured to: modify the service group globally unique mobility management entity identifier Served GUMMEIs in the S1 interface setup response message to be sent;

The response module is configured to: send an S1 interface setup response message carrying the modified Served GUMMEIs of the modification module to the HeNB, to establish an S1 interface with the HeNB;

The sent S1 interface setup response message includes one or more array elements, and each of the array elements uniquely corresponds to the GUMMEI information of one mobility management entity MME.
The apparatus for obtaining a globally unique mobility management entity identifier according to claim 4, wherein each of said array elements in said Served GUMMEIs comprises: a public land mobile network identity PLMN ID sub-element, a mobility management entity group identifier MME Group The ID sub-element, the mobility management entity encodes the MME Code sub-element and the core network type CN Type sub-element;

The PLMN ID sub-element includes a PLMN ID of the GUMMEI information corresponding to the current array element; the MME Group ID sub-element includes an MME Group ID of the GUMMEI information corresponding to the array element; the MME code sub-element includes the array of the group The MME Code of the GUMMEI information corresponding to the element; the CN Type sub-element includes the CN Type of the GUMMEI information corresponding to the array element of the group.
The device for obtaining the global unique mobile management entity identifier according to claim 4 or 5, further comprising:

And an acquiring module, configured to: before the receiving module receives the S1 interface setup request message sent by the HeNB, receive an S1 interface setup response message sent by multiple MMEs, respectively, from each of the S1 interface setup response messages Obtaining the GUMMEI information of the corresponding MME.