WO2011095127A1

WO2011095127A1 - Method for acquiring configuration information and base station

Info

Publication number: WO2011095127A1
Application number: PCT/CN2011/070829
Authority: WO
Inventors: 汪颖; 刘爱娟
Original assignee: 电信科学技术研究院
Priority date: 2010-02-04
Filing date: 2011-01-30
Publication date: 2011-08-11
Also published as: CN102111833A

Abstract

A method for acquiring configuration information is provided. The method includes the following steps: the indicating information of the X2 interface of the neighboring cell is acquired when a base station is set up or the relationship of the neighboring cells is managed; the base station judges whether there are the X2 interfaces between the neighboring cells according to the indicating information of the X2 interface, and if it is judged that there exist the X2 interfaces between the neighboring cells, the indicating information of the X2 interface is saved. A base station is also provided. The base station includes: an acquiring module and a judging and saving module. The base station can judge whether there is the X2 interface information between the neighboring cells, and if there are the X2 interfaces, then the information is received and saved, so that when the UE needs switching, it can be switched through the X2 interface. The solution reduces the pressure of accessing the core network and ensures the success rate of switching.

Description

Method and base station for obtaining configuration information The present application claims to be submitted to the Chinese Patent Office on February 4, 2010, with the application number of 201019114031.9, and the priority of the Chinese patent application entitled "A Method for Acquiring Information and Base Station" The entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of digital communications, and in particular, to a method and a base station for acquiring neighbor cell configuration information in an LTE system. Background technique

Modern mobile communication is increasingly oriented to provide high-speed transmission of multimedia services, LTE (Long Term Evolution), the birth of long-term evolution system home base station, effectively improving the coverage, throughput and indoor users of the system in hot spots. Transmission experience. In the standardization process of LTE, a concept and technology of HeNB (Home eNodeB, home base station) emerged. Unlike traditional cellular communication base stations, a home base station is a small, flexible, base station that can be installed indoors. Statistics show that for high-speed multimedia services, more applications for broadband services are indoors and hotspots. The traditional cellular mobile communication method lacks support for such requirements. The home base station was born to solve such contradictions and provide a better user experience for indoor users who need multimedia services.

In addition to the wireless access mode in the access network, the LTE system introduces some enhancement technologies and has also undergone major changes in the overall structure of the network. The LTE system adopts a flat network structure, cancels the RNC (Radio Network Controller) of the WCDMA (Wideband Code Division Multiple Access) system, and upgrades the NodeB (base station) to the eNodeB. (enhanced Node B, extended base station), the eNodeB integrates the functions of the previous RNC (Radio Network Controller), such as the management of wireless network resources, handover management, traffic aggregation, etc., further reducing the transmission processing delay, plus Stronger flexibility in network operation. In an LTE system, an eNB (enhanced Node B) is an integrated and powerful access network node.

The LTE system with the home base station is basically the same as the LTE system without the home base station. However, since the home base station needs to have the characteristics of small size and high installation flexibility, the corresponding home base station The communication between them is relatively complicated. The current LTE specification does not currently support the X2 interface between home base stations. The E-UTRAN (Evolved Universal Terrestrial Radio Access Network) introduces a HeNB GW (HomeeNB Gateway), which is equivalent to extending the home base station and the core network. An inter-S1 interface, so that more home base stations can be configured in the system. We can think of a home base station gateway as a concentrator for the centralized control layer (C-Plane), especially the S1-MME interface gateway module. The S1-U interface of the home base station can terminate at the home base station gateway or can be logically connected between the home base station and the service gateway through the direct user layer (U-Plane).

Figure 1 shows the network architecture of the home base station (HeNB) introduced in R9. As shown in Figure 1, the eNB is an X2 interface, and the eNB and the MME (Mobility Management Entity) are SI interfaces. The HeNB can be directly connected to the MME or can be accessed through a centralized node HeNB GW. There is no interface between the MME and the HeNB, and the HeNB can only connect to one HeNB GW at the same time. In the above network architecture, there is no X2 interface between the HeNBs, so the handover is implemented through the S1 interface. As shown in FIG. 2, the S1 interface switching procedure between the HeNBs is performed. The specific process includes the following steps:

Step 1: If the source HeNB considers that the UE (User Equipment) can be handed over to the target cell, it sends a handover request to the MME, that is, the handover required message. The source HeNB sends a handover required message to the HeNB GW, and the HeNB GW further sends the message to the MME. The handover required message carries the CSG ID of the target cell (Closed Subscriber Group ID). If the target cell is in the hybrid mode, it also needs to carry the access mode.

Step 2: The MME according to the CSG ID of the target cell reported by the source side and the saved The allowed CSG list of the UE performs access control on the UE.

Step 3: If the UE allows, the MME sends a handover request, that is, a handover request message to the target side, where the message carries the CSG ID of the target cell. If the target cell is a mixed mode cell, it needs to carry the UE membership IE. Specifically, the MME sends the handover request message to the HeNB GW, and the HeNB GW further transmits the message to the target HeNB.

Step 4: The target side confirms whether the CSG ID received in the handover request message matches its own CSG ID. If the confirmation is successful, the appropriate resources will be allocated on the source side. If the target cell is a mixed mode cell, different admission control and rate control are required according to the UE membership.

Step 5: The target HeNB sends a handover request response, that is, a handover request ack message to the MME. Specifically, the target HeNB sends a handover request ack message to the HeNB GW, and the HeNB GW further transmits the message to the MME.

Step 6: The MME sends a handover command, that is, a handover command message, to the source HeNB. Specifically, the MME sends a handover command message to the HeNB GW, and the HeNB GW further transmits the message to the source HeNB.

The S1 interface switching between the HeNBs is implemented through the foregoing steps.

The problem of HeNB mobility management optimization is proposed in R10. Figure 3 shows the network architecture in which the HeNB GW is deployed in R10. As shown in Figure 3, the problem of HeNB mobility management optimization is proposed in R10, and Figure 2 is a possible network architecture including HeNB GW. The eNB is an X2 interface, and the eNB and the MME are S1 interfaces. The HeNB can be directly connected to the MME, or can be connected to the MME through a centralized node HeNB GW. The HeNB can only be connected to one HeNB GW at the same time. The HeNB and the HeNB GW establish an X2 interface, and the HeNB GW terminates the X2 interface of the HeNB and other HeNB/macro eNBs. The HeNB can initiate a switching process similar to the X2 interface in the LTE R8 by using the X2 interface to reduce the impact on the core network node.

In LTE R8, the macro eNB can learn from the underlying network state and whether there is an X2 interface in the neighboring cell through the X2 interface establishment process. This method is no longer applicable in the architecture of the HeNB GW terminating the X2 interface. Currently, there is no 3GPP specification. Define HeNB How to know whether there is an X2 interface between the HeNB/macro eNB and the neighboring cell. When the UE has a handover, the HeNB has no information for determining whether to initiate an X2 handover or an S1 handover. Summary of the invention

In order to solve the above problems, an object of the present invention is to provide a method for a base station to acquire configuration information. The configuration information is used to determine whether to initiate an X2 handover or an S1 handover. According to the method provided by the present invention, the base station determines, according to the X2 interface indication information between the neighboring cells, how to initiate the handover process. If the X2 interface exists, the X2 handover will be initiated, otherwise the S1 handover will be initiated. The information may be transmitted to the base station and the X2 interface exists in the neighboring cell during the X2 setup process, the X2 configuration update process, or in the new X2-AP process, and the base station receives and saves the information.

In order to achieve the above object, an embodiment of the present invention provides a method for acquiring configuration information, including the following steps:

When the base station establishes or manages the neighbor relationship, the base station obtains the X2 interface indication information of the neighboring cell; the base station determines, according to the X2 interface indication information, whether the neighboring cell has an X2 interface, and when determining that the neighboring cell has an X2 interface, saving the The X2 interface indicates information.

Another embodiment of the present invention further provides a base station, including:

An acquiring module, configured to acquire an X2 interface indication information of a neighboring cell when the base station establishes or manages a neighbor relationship;

The determining and saving module is configured to determine, according to the X2 interface indication information from the acquiring module, whether the X2 interface exists in the neighboring cell, and when the X2 interface exists in the neighboring cell, the X2 interface indication information is saved.

According to the embodiment of the present invention, the base station determines, according to whether the neighboring cell has the X2 interface information, how to initiate the handover process, and the HeNB GW transmits the information of the X2 interface to the base station in the X2 establishment process and the X2 configuration update process, the base station Receive and save this information. When the user UE needs to switch to the neighboring cell, if there is an X2 interface, the base station will initiate an X2 handover, otherwise an S1 handover will be initiated. The HeNB can use the X2 interface to switch the d, the impact on the core network node, and ensure the success rate of the handover. DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

FIG. 1 is a network architecture diagram of deploying a HeNB in R9;

2 is a flow chart of the handover of the S1 interface between the HeNBs in the network architecture shown in FIG. 1; FIG. 3 is a network architecture diagram of the HeNB GW deployed in the R10;

4 is a flow chart of a method for acquiring configuration information according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a process for establishing an X2 interface between a HeNB and a HeNB GW according to an embodiment of the present invention;

6 is a schematic diagram of an X2 interface configuration update process between a HeNB and a HeNB GW according to an embodiment of the present invention;

7 is a schematic diagram of a process in which a HeNB GW triggers a new X2-AP;

FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In order to achieve the object of the present invention, an embodiment of the present invention provides a method for acquiring configuration information. As shown in FIG. 4, it is a flowchart of a configuration information acquisition method according to an embodiment of the present invention. The method includes:

S401: When the base station establishes or manages the neighbor relationship, the base station obtains the X2 interface indication information of the neighboring cell.

The base station includes a HeNB (HomeeNodeB, a home base station), an eNodeB (enhanced Node B, an extended base station), and a Macro eNB (a macro enhanced node).

B, macro base station). The base station may obtain the X2 interface indication information in any one of the following manners, including: (1) obtaining the X2 interface indication information during the establishment of the X2 interface between the HeNB and the HeNB GW;

(2) obtaining an X2 interface indication information during an update of the X2 interface configuration between the HeNB and the HeNB GW;

(3) In the X2-AP process between the HeNB and the HeNB GW, the X2 interface indication information is obtained.

As shown in FIG. 5, when the X2 interface is established between the HeNB and the HeNB GW, the X2 interface indication information is obtained, including the following steps:

First, the HeNB sends an X2 interface setup request to the HeNB GW (X2 SETUP).

REQUEST) message, then the HeNB GW returns an X2 SETUP RESPONSE message to the HeNB after receiving the above message.

The X2 interface setup response (X2 SETUP RESPONSE) message inherits the existing message structure, and the HeNB GW carries the X2 interface indication information of the X2 interface with the neighboring cell in the >Neighbour Information IE in the message X2 SETUP RESPONSE, or in the local area The information includes cell information that has an X2 interface with the HeNB. The HeNB obtains the X2 interface indication information according to the received X2 SETUP RESPONSE message.

Preferably, when the H2 interface configuration is updated between the HeNB and the HeNB GW, as shown in FIG.

Obtain X2 interface indication information, including the following steps:

The HeNB GW initiates an X2 interface configuration update process by sending a Base Station Configuration Update (ENB CONFIGURATION UPDATE) message to the HeNB.

The structure of the ENB CONFIGURATION UPDATE message follows the existing message structure, and the HeNB GW carries all added or modified serving cell information. And the HeNB GW carries the X2 interface indication information with the HeNB neighboring cell in the >Ndghbour Information IE in the ENB CONFIGURATION UPDATE message, or includes the cell information of the X2 interface with the HeNB in the local cell information. The HeNB obtains the X2 interface indication information according to the received ENB CONFIGURATION UPDATE message. Preferably, when the X2-AP process is established between the HeNB and the HeNB GW, the X2 interface finger is obtained.

The information includes the following steps:

The HeNB GW learns the neighbor cell information of the HeNB according to the X2 SETUP REQUEST message sent by the HeNB or the Neighbour Information IE carried in the ENB CONFIGURATION UPDATE message. When these HeNB neighbor cell information changes, the HeNB GW will trigger this new X2-AP process, as shown in Figure 7.

In the new X2-AP process, the HeNB GW returns to the HeNB whether the neighboring cell has the X2 interface indication information of the X2 interface. The HeNB obtains the X2 interface indication information according to the received new X2-AP message.

Preferably, in the foregoing X2 interface establishment process, the X2 interface update configuration update process, or the X2-AP process, the HeNB sends an X2 SETUP REQUEST or ENB CONFIGURATION UPDATE message to the HeNB GW. The HeNB GW determines whether the HeNB GW and the neighboring cell of the HeNB have no X2 interface according to the received X2 SETUP REQUEST or ENB CONFIGURATION UPDATE message, and the HeNB GW acquires the transport layer address of the neighboring cell of the HeNB, and the neighboring cell of the HeNB. Initiate the establishment of the X2 interface.

The above method provided by the embodiment of the present invention is also established when the base station is an eNB or a Macro eNB.

Preferably, when the base station is a Macro eNB, it is further determined whether the X2 interface exists with the neighboring cell according to the mapping relationship between the Tracking Area Identity (TAI) and the HeNB GW. Specifically, the macro eNB obtains the X2 interface indication information according to the TAI information of the neighboring cell, and determines whether the HeNB GW to which the target HeNB is connected and whether it has an X2 connection with the HeNB GW, thereby determining whether it has an X2 interface with the neighboring cell.

S402: The base station determines, according to the indication information of the X2 interface, whether the X2 interface exists in the neighboring cell. When the base station determines that the X2 interface exists in the neighboring cell, the base station saves the X2 interface indication information.

As shown in FIG. 5, when an X2 interface is established between the HeNB and the HeNB GW, in step 401, the HeNB acquires the X2 interface indication information, and displays the neighbor cell or the local cell information of the HeNB GW according to the acquired X2 interface indication information. Is there any self? There is already a neighboring cell of the X2 interface. If yes, the HeNB will save its X2 interface indication. When the user equipment UE needs to switch to the neighboring cell, the HeNB determines that the X2 interface exists when the neighboring cell has an X2 interface. If not, the HeNB considers that it has no X2 interface connection with these neighboring cells. , initiate the S1 interface switch.

Preferably, as shown in FIG. 6, when the X2 interface configuration is updated between the HeNB and the HeNB GW, in step 401, the HeNB acquires the X2 interface indication information, and compares the neighbor cell information of the HeNB GW according to the acquired X2 interface indication information. Whether there is a neighboring cell with its own X2 interface in the information of the cell. If there is, the HeNB will save its X2 interface indication information.

When the user equipment UE needs to switch to the neighboring cell, the HeNB determines that the X2 interface is switched when the neighboring cell has an X2 interface; if not, the HeNB considers that it has no X2 interface connection with the neighboring cells, and initiates the S1 interface switching. The HeNB then returns a Base Station Configuration Update Response (ENB CONFIGURATION ACKNOWLEDGE) message to the HeNB GW.

According to the method provided by the embodiment of the present invention, the HeNB determines how to initiate the handover procedure according to whether the neighboring cell has an X2 interface indication information of the X2 interface. If the X2 interface exists, the HeNB will initiate an X2 handover, otherwise the S1 handover will be initiated. During the X2 setup process and the X2 configuration update process, the HeNB transmits the information of the X2 interface to the HeNB and the neighboring cell. The HeNB receives and saves the information, and ensures the success rate of the handover.

Preferably, when the serving cell information changes in the HeNB, as shown in FIG. 6, the HeNB sends an X2 configuration update message to the HeNB GW.

The HeNB GW determines the Neighbor Information IE or the local cell information carried in the ENB CONFIGURATION UPDATE message initiated by the HeNB GW according to the Neighbour Information IE carried by the HeNB in the ENB CONFIGURATION UPDATE message. Specifically, the HeNB GW learns the neighboring cell information of the HeNB according to the Neighbor Information IE carried in the ENB CONFIGURATION UPDATE message sent by the HeNB. If the HeNB GW has the neighboring cell of the HeNB in the cell of the other HeNB that is connected to the HeNB GW, the HeNB GW may The Neighbour Information IE in the ENB CONFIGURATION UPDATE message sent to the HeNB next time includes the neighbor cell information of the HeNB, and carries the X2 interface indication information, or the cell information of the X2 interface in the current cell information and the eNB may be reduced by using the foregoing method. > Neighbour Information The number of cells carried by the IE or the number of information in the cell.

Preferably, when a new X2-AP is established between the HeNB and the HeNB GW, in step 401, the HeNB acquires the X2 interface indication information, and compares the neighboring cell information of the HeNB GW or the local cell information according to the acquired X2 interface indication information. Whether there is a neighboring cell with its own X2 interface. If there is, the HeNB will save its X2 interface indication information.

When the user equipment UE needs to switch to the neighboring cell, the HeNB determines that the X2 interface is switched when the neighboring cell has an X2 interface; if not, the HeNB considers that it has no X2 interface connection with the neighboring cells, and initiates the S1 interface switching. The above method provided by the embodiment of the present invention is also established when the base station is an eNB or a macro eNB.

Preferably, when the base station is the macro base station Macro eNB, the macro eNB determines whether it has an X2 interface with the neighboring cell according to the X2 interface indication information acquired in step 401. If there is an X2 interface, the Macro eNB saves the X2 interface indication information.

When the user equipment UE needs to switch to the neighboring cell, the macro eNB determines that the neighboring cell exists in the X2 interface, and initiates the X2 interface switching; if not, the macro eNB considers that the neighboring cell does not have an X2 interface connection, and initiates the S1 interface switching.

Correspondingly, the configuration information obtaining method according to the embodiment of the present invention is as shown in FIG. 8. The embodiment of the present invention further provides a base station 800, including: an obtaining module 810 and a determining and saving module 820. The base station 800 can be used to establish an X2 interface, update the X2 interface configuration, and establish a new X2-AP, respectively.

The form of the base station 800 includes a home base station HeNB, an extended base station eNB, or a macro base station Macro eNB.

The obtaining module 810 is configured to acquire the X2 interface indication information of the neighboring cell when establishing or managing the neighbor relationship.

The obtaining module 810 obtains the X2 interface information by using any one of the following manners, including: (1) obtaining an X2 interface between the ear JOF module 810 and the HeNB GW, Take the X2 interface

Indication information;

(2) Obtaining X2 during the X2 interface configuration update process between the ear JO block 810 and the HeNB GW

Interface indication information;

(3) Obtaining the X2 interface in the X2-AP process between the module 810 and the HeNB GW

Instructions.

The base station 800 further includes a transmitting module 840 for transmitting information to the base station gateway. As shown in FIG. 5, when an X2 interface connection is established between the HeNB and the HeNB GW, the sending module 840 sends an X2 SETUP REQUEST message to the HeNB GW, and the HeNB GW returns an X2 SETUP RESPONSE message to the obtaining module 810; the HeNB GW is in the message X2 SETUP RESPONSE The >Ndghbour Information IE carries the X2 interface indication information of the X2 interface with the neighboring cell, or contains the cell information of the X2 interface with the HeNB in the local cell information. The obtaining module 810 obtains the X2 interface indication information according to the received X2 SETUP RESPONSE message. Preferably, as shown in FIG. 6, when the X2 interface configuration is updated between the HeNB and the HeNB GW, the HeNB GW initiates an X2 interface configuration update process by sending an ENB CONFIGURATION UPDATE message to the obtaining module 810. The HeNB GW carries all the added or modified serving cell information, and the HeNB GW carries the X2 interface indication information in the neighboring cell of the HeNB in the Neighbour Information IE in the ENB CONFIGURATION UPDATE message, or includes the presence of the HeNB in the local cell information. Cell information of the X2 interface. The obtaining module 810 obtains the X2 interface indication information according to the received ENB CONFIGURATION UPDATE message.

Preferably, when the X2-AP process is established between the HeNB and the HeNB GW, the HeNB GW learns the neighbor cell information of the HeNB according to the X2 SETUP REQUEST message sent by the sending module 840 or the Neighbor Information IE carried in the ENB CONFIGURATION UPDATE message. When the HeNB neighbor cell information changes, The HeNB GW will trigger this new X2-AP procedure, as shown in Figure 7.

In the new X2-AP process, the HeNB GW returns to the HeNB whether the neighboring cell exists.

The X2 interface of the X2 interface indicates information. The HeNB obtains the X2 interface indication information according to the received new X2-AP message.

Preferably, when the base station is a Macro eNB, it may also determine whether the X2 interface exists with the neighboring cell according to the mapping relationship between the TAI and the HeNB GW. Specifically, the obtaining module 810 acquires the X2 interface indication information according to the TAI information of the neighboring cell, to determine whether the HeNB GW to which the target HeNB is connected, and whether there is an X2 connection with the HeNB GW, thereby determining whether the X2 interface exists with the neighboring cell. .

The base station 800 further includes a determining and saving module 820, configured to determine, according to the X2 interface indication information, whether the neighboring cell has an X2 interface, and when the neighboring cell has an X2 interface, save the X2 interface indication information.

The base station 800 further includes a switching module 830 for initiating an X2 interface switch or an S1 interface switch.

As shown in FIG. 5, when the X2 interface is established between the HeNB and the HeNB GW, the determining and saving module 820 determines whether there is an X2 interface with the neighboring cell according to the obtained X2 interface indication information. If there is an X2 interface, the X2 interface is saved. Interface indication information.

When the UE needs to switch to the neighboring cell, the determining and saving module 820 determines that the neighboring cell exists on the X2 interface, and the switching module 830 initiates the X2 interface switching; if there is no X2 interface, the switching module 830 initiates the S1 interface switching.

Preferably, as shown in FIG. 6, when the X2 interface configuration is updated between the HeNB and the HeNB GW, the determining and saving module 820 determines whether there is an X2 interface with the neighboring cell according to the obtained X2 interface indication information, and if there is an X2 interface, save The X2 interface indicates that when the UE needs to switch to the neighboring cell, the determining and saving module 820 determines that the X2 interface exists in the neighboring cell, and the switching module 830 initiates the X2 interface switching; if there is no X2 interface, the switching module 830 initiates the S1 interface switching. The sending module 840 returns to the HeNB GW ENB CONFIGURATION ACKNOWLEDGE message.

Preferably, when the X2-AP process is established between the HeNB and the HeNB GW, the determining and saving module 820 determines whether the X2 interface exists with the neighboring cell according to the obtained X2 interface indication information, and if there is an X2 interface, saves the X2 interface indication information. .

When the base station 800 is in the form of an eNB or a Macro eNB, the above technical solution provided by the embodiment of the present invention is also established.

Preferably, when the base station 800 is a Macro eNB, the Macro eNB determines the acquired X2 interface indication information, and determines whether it has an X2 interface with the neighboring cell. If so, the judgment and save module 820 saves the X2 interface indication information.

When the UE needs to switch to the neighboring cell, the determining and saving module 820 determines that the X2 interface exists in the neighboring cell, and the switching module 830 initiates the X2 interface switching; if not, the macro eNB considers that it has no X2 interface connection with the neighboring cells, and the switching module 830 Initiate an S1 interface switch.

According to the technical solution proposed by the embodiment of the present invention, when the UE performs the handover, the base station determines whether to initiate the handover process according to whether the neighboring cell has the X2 interface information. If the X2 interface exists, the base station initiates the X2 handover, otherwise the S1 handover is initiated. During the X2 establishment process and the X2 configuration update process, the HeNB GW transmits information to the base station and whether the X2 interface exists in the neighboring cell, and the base station receives and saves the information, thereby ensuring the success rate of the handover.

A person skilled in the art can understand that all or part of the steps carried by the method of the foregoing embodiment can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. , including one or a combination of the steps of the method embodiments.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The integrated module if the software works When the module is implemented in the form of a module and sold or used as a stand-alone product, it can also be stored in a computer readable storage medium.

The above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

Rights request

A method for obtaining configuration information, characterized in that the method comprises the following steps:

When the base station establishes or manages the relationship between the neighboring cells, the information about the X2 interface of the neighboring cell is obtained; the base station determines whether the neighboring cell exists between the neighboring cells according to the indication information of the X2 interface.

On the X2 interface, when the X2 interface exists between the neighboring cell and the neighboring cell, the X2 interface indication information is saved.

2. The method according to claim 1, wherein the obtaining the X2 interface indication information comprises any one of the following methods:

Obtaining, by the base station, the X2 interface indication information in an X2 interface establishment process between the base station and the base station gateway;

Obtaining, by the base station, the X2 interface indication information in an X2 interface configuration update process with the base station gateway;

The base station acquires the X2 interface indication information in an X2-AP process between the base station and the base station gateway.

The method of claim 2, wherein the acquiring, by the base station, the X2 interface indication information in the process of establishing an X2 interface with the base station gateway includes the following steps:

The base station sends an X2 SETUP REQUEST message to the base station gateway; the base station receives the X2 SETUP RESPONSE message sent by the base station gateway, and obtains the X2 interface indication information according to the received X2 SETUP RESPONSE message.

The method of claim 3, wherein the X2 SETUP RESPONSE message includes X2 interface indication information of the neighboring cell of the base station or cell information of the base station that includes an X2 interface with the base station. .

The method of claim 2, wherein the acquiring, by the base station, the X2 interface indication information in an X2 interface configuration update process between the base station and the base station gateway includes the following steps: The base station receives the ENB CONFIGURATION UPDATE message sent by the base station gateway, and obtains the X2 interface indication information according to the ENB CONFIGURATION UPDATE message.

The method according to claim 5, wherein the ENB CONFIGURATION UPDATE message includes all added or modified serving cell information, X2 interface indication information of a neighboring cell, or the base station includes the base station in the local cell. There is cell information of the X2 interface.

The method according to claim 5, wherein, when the base station generates the serving cell information change in the X2 interface configuration update process between the base station and the base station gateway, the method further includes the following steps:

Receiving, by the base station, an X2 configuration update message sent by the base station,

The base station gateway determines, according to the received X2 configuration update message, whether there is a neighboring cell having an X2 interface with the base station gateway, and if there is a neighboring cell having an X2 interface with the base station gateway, the base station gateway is next time The information of the neighboring cell and the X2 interface indication information are included in the ENB CONFIGURATION UPDATE message sent to the base station.

The method of claim 2, wherein the acquiring, by the base station, the X2 interface indication information in an X2-AP process between the base station and the base station gateway comprises the following steps:

The base station sends an X2 SETUP REQUEST or ENB CONFIGURATION UPDATE message to the base station gateway, where the SET2 SETUP REQUEST or ENB CONFIGURATION UPDATE message includes neighbor cell information of the base station; when the neighbor cell information of the base station changes, The base station gateway triggers the X2-AP process, and in the X2-AP process, the base station receives the X2 interface indication information delivered by the base station gateway.

The method according to claim 1, wherein the base station sends an X2 SETUP REQUEST or ENB CONFIGURATION UPDATE message to the base station gateway, and the base station gateway determines the location according to the X2 SETUP REQUEST or ENB CONFIGURATION UPDATE message. Base station gateway and the base station After the neighboring cell does not have the X2 interface, the base station gateway initiates the establishment of the X2 interface with the neighboring cell of the base station after acquiring the transport layer address of the neighboring cell of the base station.

The method of claim 1, wherein when the base station is a macro base station, the eNB, the obtaining the X2 interface indication information includes the following steps:

The macro base station Macro eNB acquires the X2 interface indication information according to the TAI information of the neighboring cell.

The method according to claim 1, wherein when the user equipment UE needs to switch to the neighboring cell, the base station determines that the neighboring cell has an X2 interface, and initiates an X2 interface switch; if there is no X2 interface, Initiate S1 interface switching.

A base station, comprising: an obtaining module and a determining and saving module, wherein the acquiring module is configured to acquire a neighboring cell when establishing or managing a neighbor relationship

X2 interface indication information;

The determining and saving module is configured to determine, according to the X2 interface indication information from the acquiring module, whether an X2 interface exists in the neighboring cell, and when the X2 interface exists in the neighboring cell, the X2 interface indication information is saved.

The base station according to claim 12, wherein the base station comprises a home base station HeNB, an extended base station eNB, and a macro base station Macro eNB.

The base station according to claim 13, wherein the acquiring module acquires the X2 interface indication information by using any one of the following methods:

Obtaining the X2 interface indication information in the process of establishing an X2 interface with the base station gateway;

The obtaining module obtains the X2 interface indication information in an X2 interface configuration update process with the base station gateway;

The acquiring module acquires the X2 interface indication information in an X2-AP process with the base station gateway.

The base station according to claim 14, wherein when the acquiring module acquires the X2 interface indication information during an X2 interface configuration update process with the base station gateway,

Receiving the ENB CONFIGURATION sent by the base station gateway The UPDATE message is obtained according to the ENB CONFIGURATION UPDATE message, and the Χ2 interface indication information is obtained.

The base station according to claim 14, wherein the base station further includes a sending module,

When the 获2 interface indicates the Χ2 interface indication information during the Χ2 interface establishment process with the base station gateway,

The sending module sends a SET2 SETUP REQUEST message to the base station gateway; the acquiring module receives the X2 SETUP RESPONSE message sent by the base station gateway, and obtains the X2 interface indication information according to the received X2 SETUP RESPONSE message.

The base station according to claim 16, wherein, when the acquiring module acquires the X2 interface indication information in an X2-AP process with the base station gateway, the sending module sends the base station to the base station The gateway sends an X2 SETUP REQUEST or an ENB CONFIGURATION UPDATE message, where the SET2 SETUP REQUEST or ENB CONFIGURATION UPDATE message includes neighbor cell information of the base station; when the neighbor cell information of the base station changes, the base station gateway triggers X2-AP In the process of the X2-AP, the acquiring module receives the X2 interface indication information delivered by the base station gateway.

The base station according to claim 16, wherein the sending module sends an X2 SETUP REQUEST or ENB CONFIGURATION UPDATE message to the base station gateway, and the base station gateway determines according to the Χ2 SETUP REQUEST or ENB CONFIGURATION UPDATE message. After the base station gateway and the neighboring cell of the base station do not have the Χ2 interface, the base station gateway initiates the establishment of the Χ2 interface with the neighboring cell of the base station after acquiring the transport layer address of the neighboring cell of the base station.

The base station according to claim 13, wherein, when the base station is a macro base station Macro eNB, the macro base station Macro eNB determines, according to the TAI information of the neighboring cell, the X2 interface indication information.

The base station according to claim 13, wherein the base station further includes a switching module, When the UE needs to switch to the neighboring cell, when the determining and saving module determines that the neighboring cell has an X2 interface, the switching module initiates an X2 interface switching; if there is no X2 interface, the switching module initiates an S1 interface switching.