WO2012167547A1

WO2012167547A1 - Method for the handover between base-stations, base-station and comunication system

Info

Publication number: WO2012167547A1
Application number: PCT/CN2011/082103
Authority: WO
Inventors: 李婧媛
Original assignee: 华为技术有限公司
Priority date: 2011-11-11
Filing date: 2011-11-11
Publication date: 2012-12-13
Also published as: CN102598786A; CN102598786B

Abstract

The present invention provides a method for the handover between base-stations, base-station and communication system. Said method comprises the following steps: a source base-station sends the handover request message to a target base-station, such that the User Equipment(UE) served by the source base-station would be hand over to a cell of said target base-station; according to the state information of the S1 link between said target base-station and the Mobile Management Entity(MME) which serves to said source base-station and said UE resides in, said source base-station confirms the handover to be a X2 link handover or a S1 link handover. The present invention also provides a base-station and communication system. Proper handover method can be selected from X2 link handover and S1 link handover by the present invention so that the handover from a source eNB(evolved Node Base-station) to a target eNB can be successfully processed.

Description

基站间的切换方法、基站、和通讯*** Inter-base station handover method, base station, and communication system

技术领域本发明实施例涉及移动通信技术领域，尤其涉及一种用于实现基站间切换的技术方案。 The present invention relates to the field of mobile communications technologies, and in particular, to a technical solution for implementing inter-base station handover.

背景技术 Background technique

3GPP长期演进（ Long Term Evolution,以下筒称 LTE ) ***是非常有前景的移动通信***，它源于传统的通用移动通信*** （ Universal Mobile Telecommunications System, UMTS ) 网络，能够提供更高的无线接入速率和更好的业务支持。 The 3GPP Long Term Evolution (LTE) system is a very promising mobile communication system. It originates from the traditional Universal Mobile Telecommunications System (UMTS) network and provides higher wireless access. Speed and better business support.

以 LTE***为例，其采用扁平的无线接入网（ Radio Access Network , 筒称 RAN )结构，取消了无线网络控制器（ Radio Network Control,筒称 RNC )。如图 1所示， LTE***包括演进基站（evolved-NodeB, 筒称 eNB )和演进型分组核心网 ( Evolved Packer Core Network, 筒称 EPC )构成。 eNB之间通过 X2接口相连接， eNB和 EPC之间通过 S 1接口相连接。 EPC包括移动管理实体（ Mobility Management Entity, 筒称 MME )及***架构演进网关（ SAE GateWay, 筒称 SGW )。例如， MME作为控制面部分，负责控制面的移动性管理，包括用户上下文和移动状态管理，分配用户临时身份标识等。 eNB与 MME之间通过 S 1接口的代理（ proxy )功能，实现 eNB与 MME间控制面信令的传递。又如， SGW作为用户面部分，负责空闲状态下为下行数据发起寻呼，管理保存因特网协议（Internet Protocol, 筒称 IP )承载参数和网络内路由信息等。 eNB与 SGW之间通过 S1接口的代理（proxy ) 功能，实现 eNB与 SGW间用户面信令的传递。 Taking the LTE system as an example, it adopts a flat radio access network (Radio Access Network, RAN) structure, and cancels the radio network controller (Radio Network Control, called RNC). As shown in FIG. 1, the LTE system includes an evolved base station (evolved-NodeB) and an evolved packet core network (Evolved Packer Core Network, EPC). The eNBs are connected through an X2 interface, and the eNB and the EPC are connected through an S1 interface. The EPC includes a Mobility Management Entity (MME) and a System Architecture Evolution Gateway (SAE GateWay, SGW). For example, the MME acts as the control plane part and is responsible for the mobility management of the control plane, including user context and mobility state management, assigning user temporary identity, and the like. The eNB and the MME implement the transmission of control plane signaling between the eNB and the MME through a proxy function of the S1 interface. For example, the SGW is used as a user plane part, and is responsible for initiating paging for downlink data in an idle state, and managing and storing Internet Protocol (IP) bearer parameters and intra-network routing information. The proxy function between the eNB and the SGW is implemented by the proxy function of the S1 interface to implement user plane signaling between the eNB and the SGW.

在无线通讯***中，切换是保持业务连续性的基本特性，通过提高切换成功率，可以保证终端的业务连续性。所谓切换，是指当终端在通话过程中从一个 eNB下的小区移动到另一个 eNB下的小区，或者由于外界干扰而造成终端通话质量下降时，需要改变终端原有的话音信道而转接到一条新的空闲话音信道上，以继续保持通话的过程。 In wireless communication systems, switching is the basic feature of maintaining business continuity. Switching to power can guarantee the business continuity of the terminal. The so-called handover means that when the terminal moves from the cell under one eNB to the cell under another eNB during the call, or the call quality of the terminal is degraded due to external interference, the original voice channel of the terminal needs to be changed and transferred to A new idle voice channel to continue the process of holding the call.

在基于 LTE技术的无线通讯***中，上述切换可以分为 eNB与 EPC间的 S 1链路切换、和 eNB间的 X2链路切换。发起切换的 eNB可以称为源 eNB , 接收切换请求的 eNB可以称为目标 eNB。 In the wireless communication system based on the LTE technology, the handover can be divided into an S1 link handover between the eNB and the EPC, and an X2 link handover between the eNBs. The eNB that initiates the handover may be referred to as a source eNB, and the eNB that receives the handover request may be referred to as a target eNB.

目前，业界期盼一种 eNB间的切换方法，当源 eNB向目标 eNB发起切换请求时，能够在 X2链路切换和 S1链路切换中选择适合的切换方法，以成功进行源 eNB向目标 eNB的切换。 At present, the industry expects a handover method between eNBs. When the source eNB initiates a handover request to the target eNB, it can select an appropriate handover method in the X2 link handover and the S1 link handover to successfully perform the source eNB to the target eNB. Switching.

发明内容本发明实施例提供一种基站间的切换方法、基站、和通讯***，用于解决如何在 X2链路切换和 S1链路切换中选择合适切换方法的问题。 SUMMARY OF THE INVENTION Embodiments of the present invention provide a handover method between a base station, a base station, and a communication system, which are used to solve the problem of how to select an appropriate handover method in X2 link handover and S1 link handover.

本发明的一方面提供一种基站间的切换方法，包括： An aspect of the present invention provides a method for switching between base stations, including:

源基站向目标基站发送切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中； The source base station sends a handover request message to the target base station, where the user equipment User Equipment (UE) serving the source base station is switched to the cell under the target base station;

所述源基站根据所述目标基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 SI链路状态信息，确认进行 X2链路切换或 S 1链路切换。 Determining, by the source base station, the X2 link switch or the S1 according to the SI link state information between the target base station and the mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping Link switching.

本发明的又一方面提供一种基站间的切换方法，包括： A still further aspect of the present invention provides a method for switching between base stations, including:

目标基站接收源基站发送的切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中；所述目标基站向所述源基站发送所述目标基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME )间的 S 1 链路状态信息，用于所述源基站确认进行 Χ2链路切换或 S1链路切换。本发明的另一方面提供一种基站，包括： Receiving, by the target base station, a handover request message sent by the source base station, where the user equipment User Equipment (UE) serving the source base station is switched to the cell under the target base station; and the target base station transmitting the location to the source base station a target base station, S 1 between a mobile management entity Mobile Management Entity (MME) serving the source base station and the UE camping Link state information, used by the source base station to confirm a 链路2 link switch or an S1 link switch. Another aspect of the present invention provides a base station, including:

发送单元，用于向目标基站发送切换请求消息，以便将所述基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中；处理单元，用于根据所述目标基站、与服务于所述基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME )间的 SI链路状态信息，确认进行 X2链路切换或 S1链路切换。 a sending unit, configured to send a handover request message to the target base station, to switch the user equipment User Equipment (UE) that is served by the base station to a cell under the target base station, and a processing unit, configured to use, according to the target base station, The SI link state information between the mobility management entity Mobile Management Entity (MME) serving the base station and camped by the UE is confirmed to perform an X2 link handover or an S1 link handover.

本发明的再一方面提供一种基站，包括： A further aspect of the present invention provides a base station, including:

接收单元，用于接收源基站发送的切换请求消息，以便将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述基站下的小区中；发送单元，用于向所述源基站发送所述基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 SI 链路状态信息，以便所述源基站确认进行 Χ2链路切换或 S1链路切换。 a receiving unit, configured to receive a handover request message sent by the source base station, to switch the user equipment User Equipment (UE) that provides the service by the source base station to a cell under the base station, and a sending unit, configured to send to the source base station Transmitting, by the base station, SI link state information between the mobile management entity Mobile Management Entity (MME) serving the source base station and the UE camping, so that the source base station confirms the Χ2 link switch or the S1 chain Road switching.

本发明的再一方面提供一种通讯***，包括： A further aspect of the present invention provides a communication system, including:

一源基站、及一目标基站； a source base station, and a target base station;

所述源基站，用于向目标基站发送切换请求消息，以便将所述基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中；及根据所述目标基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME )间的 SI链路状态信息，进行 X2链路切换或 S1链路切换； The source base station is configured to send a handover request message to the target base station, so as to switch the user equipment User Equipment (UE) serving the base station to the cell under the target base station; and according to the target base station, and the service Performing an X2 link switch or an S1 link switch on the SI link state information between the source base station and the mobility management entity Mobile Management Entity (MME) where the UE camps;

所述目标基站，用于接收源基站发送的切换请求消息；及向所述源基站发送所述目标基站、与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息。 The target base station is configured to receive a handover request message sent by the source base station, and send, to the source base station, S1 link state information between the target base station and an MME serving the source base station and the UE camping .

本发明的基站间的切换方法、基站、和通讯***，用于保证在 X2链路切换和 S1链路切换中选择适合的切换方法，以成功进行源 eNB向目标 eNB 的切换，实现终端自源 eNB下的小区切换至目标 eNB下的小区。附图说明图 1为现有技术中 LTE***的架构示意图； The inter-base station handover method, the base station, and the communication system are used to ensure that a suitable handover method is selected in the X2 link handover and the S1 link handover, so as to successfully perform handover of the source eNB to the target eNB, and implement the terminal self-source. The cell under the eNB switches to the cell under the target eNB. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural diagram of an LTE system in the prior art;

图 2为本发明一实施例的基站间的切换方法的流程图； 2 is a flowchart of a method for switching between base stations according to an embodiment of the present invention;

图 3为本发明另一实施例的基站间的切换方法的流程图； 3 is a flowchart of a method for switching between base stations according to another embodiment of the present invention;

图 4为本发明另一实施例的基站间的切换方法的流程图； 4 is a flowchart of a method for switching between base stations according to another embodiment of the present invention;

图 5为本发明另一实施例的基站间的切换方法的流程图； FIG. 5 is a flowchart of a method for switching between base stations according to another embodiment of the present invention; FIG.

图 6为本发明另一实施例的基站结构示意图； 6 is a schematic structural diagram of a base station according to another embodiment of the present invention;

图 7为本发明另一实施例的基站结构示意图。具体实施方式为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。 FIG. 7 is a schematic structural diagram of a base station according to another embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive work are all within the scope of the present invention.

本领域技术人员可以理解附图只是一个优选实施例的示意图，附图中的模块或流程并不一定是实施本发明所必须的。 A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the modules or processes in the drawings are not necessarily required to implement the invention.

本文中结合终端和 /或基站来描述各种方面。 Various aspects are described herein in connection with a terminal and/or a base station.

终端，指的是向用户提供语音和 /或数据连通性的设备，包括无线终端或有线终端。无线终端可以是具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备，经无线接入网（Radio Access Network, 筒称 RAN )与一个或多个核心网进行通信的移动终端。例如，无线终端可以是移动电话（或称为"蜂窝"电话）和具有移动终端的计算机。又如，无线终端也可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。再如,无线终端还可以是个人通信业务( Personal Communication Service , 筒称 PCS ) 电话、无绳电话、会话发起协议（Session Initiated Protocol, 筒称 SIP )话机、无线本地环路 ( Wireless Local Loop, 筒称 WLL )站、个人数字助理（Personal Digital Assistant, 筒称 PDA )等设备。再如，无线终端也可以称为***、订户单元 ( Subscriber Unit )、订户站 ( Subscriber Station ), 移动站（ Mobile Station )、移动台（ Mobile )、远程站（ Remote Station )、接入点（ Access Point )、远程终端（ Remote Terminal )、接入终端（ Access Terminal ), 用户终端（ User Terminal )、用户代理（User Agent )、用户设备 ( User Device )、或用户装备 ( User Equipment, 筒称 UE )。 A terminal refers to a device that provides voice and/or data connectivity to a user, including a wireless terminal or a wired terminal. The wireless terminal may be a handheld device having a wireless connection function, or another processing device connected to the wireless modem, and a mobile terminal that communicates with one or more core networks via a Radio Access Network (RAN). For example, the wireless terminal can be a mobile phone (or "cellular" phone) and a computer with a mobile terminal. As another example, the wireless terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device. For another example, the wireless terminal can also be a personal communication service (PCS) telephone, a cordless telephone, and a Session Initiated Protocol (Session Initiated Protocol). It is called SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA). For another example, the wireless terminal may also be referred to as a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, and an Access Point. Point ), Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment (User Equipment) .

基站，指的是指接入网中在空中接口上通过一个或多个小区与无线终端通信的设备。基站可用于将收到的空中帧与网际协议（Internel Protocol, 筒称 IP )分组进行相互转换，作为无线终端与接入网的其余部分之间的路由器，其中接入网的其余部分可包括 IP网络。基站还可协调空中接口的属性管理。例如，基站可以是 GSM 或 CDMA 中的基站（Base Transceiver Station, 筒称 BTS ) , 也可以是 WCDMA中的基站（ NodeB ) ,还可以是 LTE 中的演进型基站（ evolutional Node B , 筒称 NodeB或 eNB或 e-NodeB ), 本发明对此并不做限定。 A base station refers to a device in an access network that communicates with a wireless terminal over one or more cells on an air interface. The base station can be used to convert the received air frame into an inter-network protocol (Internet Protocol) packet as a router between the wireless terminal and the rest of the access network, wherein the rest of the access network can include IP. The internet. The base station can also coordinate the attribute management of the air interface. For example, the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved Node B in LTE (called NodeB or The eNB or e-NodeB) is not limited by the present invention.

另外，本文中术语"***"和"网络"在本文中常被可互换使用。本文中术语"和 /或"，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如， A和 /或 B , 可以表示：单独存在 A, 存在 A和 B, 单独存在 B这三种情况。另外，本文中字符 " , —般表示前后关联对象是一种 "或" 的关系。 Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, A and B exist, B exists alone These three situations. In addition, the character " in this article" generally means that the contextual object is an "or" relationship.

本发明的不同实施例， X2链路切换指的是不涉及 EPC重定位的移动性管理。例如，当 UE在一个 MME群组中移动或切换在同一个 MME内执行时，切换过程不涉及 MME及 SGW, 由源基站直接与目标基站通过 X2接口进行交互，进行 X2链路切换。 S1链路切换指的是涉及 EPC重定位的移动性管理。当 UE在两个 MME群组中移动时，或源基站和目标基站间没有 X2接口，又或者目标基站与服务于源基站且 UE驻留的 MME间没有 S1接口时，需要执行 MME重定位，进行 S1链路切换。 In various embodiments of the present invention, X2 link switching refers to mobility management that does not involve EPC relocation. For example, when the UE moves in a MME group or the handover is performed in the same MME, the handover process does not involve the MME and the SGW, and the source base station directly interacts with the target base station through the X2 interface to perform X2 link handover. S1 link switching refers to mobility management involving EPC relocation. When the UE moves in two MME groups, or there is no X2 interface between the source base station and the target base station, or there is no S1 connection between the target base station and the MME serving the source base station and the UE camping. At the time of the port, MME relocation needs to be performed to perform S1 link switching.

其中， X2链路的切换过程，包括： The switching process of the X2 link includes:

201 : UE向源基站上报测量报告。 201: The UE reports a measurement report to the source base station.

202: 源基站向目标基站发送 X2链路切换请求消息。 202: The source base station sends an X2 link switch request message to the target base station.

上述 X2链路切换请求消息中包括目标基站为切换准备资源所必须的信息，如 UE在源基站中的信令上下文参考信息、 UE的 S1信令上下文参考信息、目标小区的标识等。 The X2 link switch request message includes information necessary for the target base station to prepare resources for handover, such as signaling context reference information of the UE in the source base station, S1 signaling context reference information of the UE, and identifier of the target cell.

203：目标基站向源基站发送 X2链路切换请求确认消息。 203: The target base station sends an X2 link switch request acknowledgement message to the source base station.

204: 源基站向目标基站发送序列号状态信息，实现源基站和目标基站的同步。 204: The source base station sends the sequence number status information to the target base station to implement synchronization between the source base station and the target base station.

205: 源基站向 UE发送无线资源控制（Radio Resource Control, 筒称 205: The source base station sends a radio resource control (Radio Resource Control) to the UE.

RRC )连接重配置消息。 RRC) Connection reconfiguration message.

206: UE向目标基站发送 RRC连接重配置完成消息。 206: The UE sends an RRC connection reconfiguration complete message to the target base station.

207: 目标基站向 MME发送路径切换请求消息（ Path Switch Request ) 。上述路径切换请求中携带目标基站向 MME请求获取 UE用户信息的指示。 207: The target base station sends a path switch request message (Path Switch Request) to the MME. The path switching request carries an indication that the target base station requests the MME to acquire UE user information.

208： MME 向目标基站发送路径切换确认消息（ Path Switch Acknowledge ) 。 208: The MME sends a Path Switch Acknowledge message to the target base station.

上述路径切换确认消息中携带 UE的用户信息。 The path switching acknowledgement message carries the user information of the UE.

209: 目标基站向源基站发送释放 UE上下文消息。 209: The target base station sends a release UE context message to the source base station.

在正常的 X2链路切换过程中， MME向目标基站发送的路径切换确认消息中携带 UE的用户信息，随后，目标基站向源基站发送释放 UE上下文消息，通知源基站 X2链路切换已经顺利完成，可以释放原先占用的资源。 During the normal X2 link handover process, the path switching acknowledgement message sent by the MME to the target base station carries the user information of the UE, and then the target base station sends a release UE context message to the source base station, informing the source base station that the X2 link switch has been successfully completed. , you can release the resources that were originally occupied.

但是，当目标基站与服务于源基站且 UE驻留的 MME间的 S1链路异常不可用时， MME就无法获取上述 UE的用户信息。虽然目标基站可以通过在目标侧的 MME群组中寻找到与目标基站间的 S1 链路为正常可用的 MME1 ,并把路径切换请求消息发送到 MME1。但是，因为 UE驻留在 MME 中而非驻留 MME1中，故 MME1中没有 UE的用户信息， MME1不处理上述路径切换请求消息，导致目标基站等待路径切换确认消息超时， X2链路切换失败。 However, when the S1 link between the target base station and the MME serving the source base station and the UE camping is abnormally unavailable, the MME cannot acquire the user information of the UE. Although the target base station can find that the S1 link with the target base station is normally available by searching in the MME group on the target side. MME1 and sends a Path Switch Request message to MME1. However, because the UE resides in the MME instead of the MME1, there is no user information of the UE in the MME1, and the MME1 does not process the path switch request message, causing the target base station to wait for the path switch confirmation message to time out, and the X2 link switch fails.

本发明的不同实施例，可以根据目标基站与服务于源基站且 UE驻留的 Different embodiments of the present invention may be based on the target base station and the source base station and the UE camped on

MME间的 S1链路状态信息，指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路是否正常，以判决源基站与目标基站进行 S1链路切换或 X2链路切换，成功进行源基站向目标基站的切换，实现 UE 自源基站下的小区切换至目标基站下的小区。 S1 link state information between the MMEs, indicating whether the S1 link between the target base station and the MME serving the source base station and the UE camping is normal, to determine that the source base station and the target base station perform S1 link switching or The X2 link is switched, and the source base station is successfully switched to the target base station, so that the cell handover from the source base station to the cell under the target base station is implemented.

以下，结合附图对各具体实施例进行详细说明。 Hereinafter, each specific embodiment will be described in detail with reference to the drawings.

本发明一实施例提供一种基站间的切换方法，如图 2所示，包括： An embodiment of the present invention provides a method for switching between base stations. As shown in FIG. 2, the method includes:

301 : 源基站向目标基站发送切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中。 301: The source base station sends a handover request message to the target base station, where the user equipment User Equipment (UE) that provides the service by the source base station is switched to the cell under the target base station.

302: 所述源基站根据所述目标基站、与服务于所述源基站且所述 UE 驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 S 1链路状态信息，确认进行 X2链路切换或 S 1链路切换。 302: The source base station confirms that the X2 link switch is performed according to the S1 link state information between the target base station and the mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping. Or S 1 link switching.

在 301中，当所述源基站确认服务于所述源基站的 MME群组和服务于所述目标基站的 MME群组具有相同的 MME群组标识（筒称 MME Group ID )、及所述源基站和所述目标基站间的 X2链路正常时，所述源基站向所述目标基站发送 X2链路切换请求消息。此时，源基站默认源基站和目标基站由同样的 MME提供服务，且 X2链路可用，故，源基站和目标基站间的切换无需经过 MME的 S1链路，通过源基站和目标基站间的 X2链路可直接完成切换动作。 In 301, when the source base station confirms that the MME group serving the source base station and the MME group serving the target base station have the same MME group identifier (the MME Group ID), and the source When the X2 link between the base station and the target base station is normal, the source base station sends an X2 link switch request message to the target base station. At this time, the source base station defaults that the source base station and the target base station are served by the same MME, and the X2 link is available. Therefore, the handover between the source base station and the target base station does not need to pass through the S1 link of the MME, and passes between the source base station and the target base station. The X2 link can directly perform the switching action.

在本实施例中，通过两个标识符可以唯一标识一个 MME, 上述标识符分别为 MME Group ID和 MME密钥（筒称 MME Code )。源基站可以通过自身获取向其提供服务的 MME群组的 MME Group ID。例如，当源基站和服务于源基站的 MME群组建立 S1链路连接时，源基站可以获取服务于源基站的 MME群组的 MME Group ID。且，向源基站提供服务的 MME群组中的各个 MME具有相同的 MME Group ID , 及不同的 MME Code。同样，目标基站也可以通过自身获取向其提供服务的 MME群组的 MME Group ID。且，向目标基站提供服务的 MME群组中的各个 MME具有相同的 MME Group ID , 及不同的 MME Code。 In this embodiment, an MME can be uniquely identified by two identifiers, and the identifiers are respectively an MME Group ID and an MME key (called MME Code). The source base station can obtain the MME Group ID of the MME group to which the source base station provides services. For example, when the source base station and When the MME group serving the source base station establishes an S1 link connection, the source base station may acquire the MME Group ID of the MME group serving the source base station. And, each MME in the MME group that provides the service to the source base station has the same MME Group ID and different MME Codes. Similarly, the target base station can also obtain the MME Group ID of the MME group to which the target base station is served. Moreover, each MME in the MME group that provides the service to the target base station has the same MME Group ID and a different MME Code.

在本实施例中，源基站可以通过显性方式或隐形方式获悉源基站和目标基站间的 X2链路是否正常。例如，显性方式为，源基站可以通过源基站侧的状态标识获取 X2链路的状态。上述状态标识分别代表 X2链路的三种状态，包括：断开、繁忙、及正常。例如，当状态标识将 X2链路的状态标记为断开时，表示源基站和目标基站间的 X2链路的物理层还没有配置好， X2链路不可用。又如，当状态标识将 X2链路的状态标记为繁忙时，表示源基站和目标基站间的 X2链路的物理层已连接，但无法经由 X2链路传送数据， X2链路不可用。再如，当状态标识将 X2链路的状态标记为正常时，表示源基站和目标基站间的 X2链路的物理层已连接，且可以经由 X2链路传送数据， X2链路正常可用。又如，隐形方式为，源基站或目标基站向对端（源基站的对端为目标基站，同样，目标基站的对端为源基站。）传送数据，如果对端接收到上述数据，则表明源基站和目标基站间的 X2链路正常可用。本领域的技术人员可以理解，通过其他方法也可以获悉源基站和目标基站间的 X2链路是否正常，在此不再赘述。在本实施例中，当触发 A3事件时，源基站向目标基站发送切换请求消息。上述 A3事件指的是当邻区的服务质量比服务小区高一个门限值。例如，目标基站下的小区的服务质量比 UE 当前所附着的源基站下的小区的服务质量高一个门限值时，源基站向目标基站发送切换请求消息，用于将 UE 切换至目标基站下的小区。本领域的技术人员可以理解，上述门限值的定义可以为一个具体数值、也可以为一个数值范围，本发明对此不做限定。在 302中，服务于源基站且用户设备（ User Equipment, 筒称 UE )驻留的 MME保留有 UE的用户信息。例如，上述 UE的用户信息可以为与 UE相关的安全性上下文、漫游限制、 UE能力信息等。在本实施例中，源基站接收目标基站发送的目标基站与服务于源基站且 UE驻留的 MME间的 S1链路状态信息。当所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路异常时，源基站终止与所述目标基站的 X2链路切换，转而进行 S1链路切换。当所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路正常时，所述源基站与所述目标基站正常进行 X2链路切换。或者，当源基站没有接收到目标基站发送的目标基站与服务于源基站且 UE驻留的 MME间的 S1链路状态信息，且目标基站向源基站发送切换确认消息，源基站根据切换确认消息默认所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路正常，源基站与目标基站正常进行 X2链路切换。在本实施例中，上述指示所述目标基站与服务于所述源基站且所述 UE 驻留的 MME间的 S1链路异常的 S1链路状态信息可以携带在目标基站向源基站发送的切换准备失败消息（ HANDOVER PREPARATION FAILURE ) Layer cause )信元中增加一个原因值，上述原因值表示目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路异常不可以用。源基站接收到上述原因值后，可以判决无法进行源基站和目标基站间的 X2链路切换，需要终止 X2链路切换，转而进行 S1链路切换。故，本实施例可以根据目标基站向源基站发送的目标基站与服务于源基站且 UE驻留的 MME间的 S1链路状态信息，指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 SI链路是否正常，以判决源基站与目标基站进行 S1链路切换或 X2链路切换，成功进行源基站向目标基站的切换，实现 UE自源基站下的小区切换至目标基站下的小区。本发明另一实施例提供一种基站间的切换方法，如图 3所示，包括： 401 : 源基站获取服务于所述源基站且所述 UE驻留的 MME的 MME 密钥 MME Code。 In this embodiment, the source base station can learn whether the X2 link between the source base station and the target base station is normal in an explicit manner or a stealth manner. For example, the dominant mode is that the source base station can obtain the state of the X2 link by using the status identifier on the source base station side. The above status identifiers represent the three states of the X2 link, including: disconnected, busy, and normal. For example, when the status indicator marks the status of the X2 link as disconnected, it indicates that the physical layer of the X2 link between the source base station and the target base station has not been configured yet, and the X2 link is unavailable. For another example, when the status indicator marks the status of the X2 link as busy, it indicates that the physical layer of the X2 link between the source base station and the target base station is connected, but the data cannot be transmitted via the X2 link, and the X2 link is unavailable. For another example, when the status indicator marks the status of the X2 link as normal, it indicates that the physical layer of the X2 link between the source base station and the target base station is connected, and data can be transmitted via the X2 link, and the X2 link is normally available. For example, the invisible mode is that the source base station or the target base station transmits data to the opposite end (the opposite end of the source base station is the target base station, and the opposite end of the target base station is the source base station.), if the peer end receives the above data, it indicates The X2 link between the source base station and the target base station is normally available. It can be understood by those skilled in the art that the X2 link between the source base station and the target base station is normal through other methods, and details are not described herein again. In this embodiment, when the A3 event is triggered, the source base station sends a handover request message to the target base station. The above A3 event refers to when the quality of service in the neighboring cell is higher than the serving cell by a threshold. For example, when the quality of service of the cell under the target base station is higher than the quality of service of the cell under the source base station to which the UE is currently attached, the source base station sends a handover request message to the target base station, and is used to switch the UE to the target base station. Community. It is to be understood by those skilled in the art that the above-mentioned threshold value may be a specific value or a numerical range, which is not limited by the present invention. In 302, the MME that serves the source base station and the user equipment (User Equipment, UE) resides retains the user information of the UE. For example, the user information of the foregoing UE may be a security context, a roaming restriction, UE capability information, and the like related to the UE. In this embodiment, the source base station receives the S1 link state information between the target base station and the MME serving the source base station and the UE camped by the target base station. S1 link state information between the target base station and an MME serving the source base station and camped by the UE, indicating S1 between the target base station and an MME serving the source base station and the UE camping When the link is abnormal, the source base station terminates the X2 link switching with the target base station, and then performs S1 link switching. S1 link state information between the target base station and an MME serving the source base station and camped by the UE, indicating S1 between the target base station and an MME serving the source base station and the UE camping When the link is normal, the source base station and the target base station normally perform X2 link switching. Or, when the source base station does not receive the S1 link state information between the target base station sent by the target base station and the MME serving the source base station and the UE camps, and the target base station sends a handover confirm message to the source base station, the source base station according to the handover confirm message By default, the S1 link between the target base station and the MME serving the source base station and the UE camping is normal, and the source base station and the target base station normally perform X2 link switching. In this embodiment, the foregoing S1 link state information indicating that the target base station is abnormal with an S1 link between the source base station and the MME that the UE camps on may carry the handover sent by the target base station to the source base station. A cause value is added to the cell. The reason value indicates that the S1 link abnormality between the target base station and the MME serving the source base station and the UE camping is not available. After receiving the above-mentioned cause value, the source base station may determine that the X2 link switch between the source base station and the target base station cannot be performed, and the X2 link switch needs to be terminated, and then the S1 link switch is performed. Therefore, in this embodiment, the target base station and the service may be indicated according to the S1 link state information between the target base station that is sent by the target base station to the source base station and the MME that serves the source base station and the UE camps on. Whether the SI link between the source base station and the MME that the UE camps on is normal, to determine that the source base station and the target base station perform S1 link switching or X2 link switching, and successfully perform handover of the source base station to the target base station, and implement The UE switches from the cell under the source base station to the cell under the target base station. Another embodiment of the present invention provides a method for switching between base stations. As shown in FIG. 3, the method includes: 401: A source base station acquires an MME key MME Code of an MME serving the source base station and camped by the UE.

402 : 所述源基站接收所述目标基站发送的服务于所述目标基站的 MME群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常。 403 : 源基站向目标基站发送切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中。 402: The source base station receives, by the target base station, an MME Code set of an MME group serving the target base station, and an S1 chain between the MME represented by the MME Code and the target base station in the MME Code set. The road is normal. 403: The source base station sends a handover request message to the target base station, where the user equipment User Equipment (UE) that provides the service by the source base station is switched to the cell under the target base station.

404: 所述源基站根据所述目标基站、与服务于所述源基站且所述 UE 驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 SI链路状态信息，确认进行 X2链路切换或 S 1链路切换。在 401中，当源基站和服务于源基站的 MME群组间建立 S1链路连接时，源基站可以获取上述 MME群组中的 MME的 MME Group ID和 MME Code。当 UE准备接入源基站时，源基站根据 UE的用户信息选择驻留的 EPC , 且根据小区负载平衡，为 UE选择 EPC中的 MME群组中的合适的 MME, 让 UE得以驻留在上述 MME中。此时，源基站可以获取服务于源基站且 UE驻留的 MME的 MME Code。 404: The source base station determines, according to the target base station, the SI link state information between the mobile management entity (MME) serving the source base station and the mobility management entity (MME) where the UE camps, performing an X2 link switch or S 1 link switching. In 401, when the S1 link connection is established between the source eNB and the MME group serving the source eNB, the source eNB may obtain the MME Group ID and the MME Code of the MME in the MME group. When the UE prepares to access the source base station, the source base station selects the camped EPC according to the user information of the UE, and selects a suitable MME in the MME group in the EPC for the UE according to the cell load balancing, so that the UE can reside in the above. In the MME. At this time, the source base station can acquire the MME Code of the MME serving the source base station and the UE camped on.

在 402 中，当所述源基站和所述目标基站建立连接时，所述源基站接收所述目标基站发送的 X2链路连接建立请求消息（X2 Setup Request )或 X2链路连接建立响应消息（X2 Setup Response ) , 所述 Χ2链路连接建立请求消息或所述 Χ2链路连接建立响应消息可以包括服务于所述目标基站的 MME群组的 MME Code集合。本领域的技术人员可以理解，在源基站和目标基站建立连接的过程中，当源基站首先发起建立连接需求时，源基站向目标基站发送 X2链路连接建立请求消息，目标基站向源基站发送 X2 链路连接建立响应消息，以确认连接。当目标基站首先发起建立连接需求时，目标基站向源基站发送 X2链路连接建立请求消息，源基站向目标基站发送 X2链路连接建立响应消息，以确认连接。当所述源基站和所述目标基站间需要重新配置连接时，所述源基站接收所述目标基站发送的配置更新消息（ Configuration Update )或配置更新确认消息（ Configuration Update Acknowledge ) , 所述配置更新消息或所述配置更新确认消息可以包括服务于所述目标基站的 ΜΜΕ群组的 MME Code 集合。例如，当源基站和目标基站间建立连接后，当源基站或目标基站的相关信息发生变化时（如源基站或目标基站下的小区数量发生变化时），通知对端基站做相应更新。本领域的技术人员可以理解，在源基站和目标基站建立连接的过程中，当源基站首先发起重新配置需求时，源基站向目标基站发送配置更新消息，目标基站向源基站发送配置更新确认消息，以确认重配置连接。当目标基站首先发起重新配置需求时，目标基站向源基站发送配置更新消息，源基站向目标基站发送配置更新确认消息，以确认重配置连接。本实施例的 403可以参考上一实施例 301 中的相关描述，在此不再赘述。在 404中，源基站判断服务于所述源基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的 MME Code是否相同，根据判断结果进行源基站和目标基站间的 X2切换或 S1切换。例如，当服务于所述源基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的一个 MME Code相同时，源基站确定目标基站与服务于所述源基站且所述 UE 驻留的 MME间的 SI链路正常可用，无需进行 EPC重定向的移动性管理，源基站与所述目标基站进行 X2链路切换。又如，当所述服务于所述源基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的任意 MME Code均不相同时，源基站确定目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路异常不可用，需要进行 EPC重定向的移动性管理，所述源基站与所述目标基站进行 S1链路切换。故，本实施例可以根据目标基站向源基站发送的目标基站与服务于目标基站的 MME间的 S1链路状态信息，指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S 1链路是否正常，以判决源基站与目标基站进行 S1链路切换或 X2链路切换，成功进行源基站向目标基站的切换，实现 UE自源基站下的小区切换至目标基站下的小区。本发明另一实施例提供一种基站间的切换方法，如图 4所示，包括：In 402, when the source base station and the target base station establish a connection, the source base station receives an X2 link connection setup request message (X2 Setup Request) or an X2 link connection setup response message sent by the target base station ( X2 Setup Response), the Χ2 link connection establishment request message or the Χ2 link connection establishment response message may include serving the target base station MME Code collection of MME groups. It can be understood by those skilled in the art that, in the process of establishing a connection between the source base station and the target base station, when the source base station first initiates the establishment of the connection requirement, the source base station sends an X2 link connection establishment request message to the target base station, and the target base station sends the source base station to the source base station. The X2 link connection establishes a response message to confirm the connection. When the target base station first initiates the establishment of the connection requirement, the target base station sends an X2 link connection establishment request message to the source base station, and the source base station sends an X2 link connection establishment response message to the target base station to confirm the connection. When the connection between the source base station and the target base station needs to be reconfigured, the source base station receives a configuration update message (Configuration Update) or a configuration update acknowledgement message (Configuration Update Acknowledge) sent by the target base station, where the configuration update is performed. The message or the configuration update acknowledgement message may include an MME Code set of a group serving the target base station. For example, when the connection between the source base station and the target base station is changed, when the related information of the source base station or the target base station changes (for example, when the number of cells under the source base station or the target base station changes), the opposite base station is notified to perform corresponding update. A person skilled in the art can understand that, in the process of establishing a connection between the source base station and the target base station, when the source base station first initiates a reconfiguration request, the source base station sends a configuration update message to the target base station, and the target base station sends a configuration update acknowledgement message to the source base station. To confirm the reconfiguration connection. When the target base station first initiates a reconfiguration request, the target base station sends a configuration update message to the source base station, and the source base station sends a configuration update confirmation message to the target base station to confirm the reconfiguration connection. For reference to 403 in this embodiment, reference may be made to the related description in the previous embodiment 301, and details are not described herein again. In 404, the source base station determines whether the MME Code of the MME that is served by the source base station and the UE is the same as the MME Code in the MME Code set, and performs X2 handover between the source base station and the target base station according to the determination result. Or switch with S1. For example, when serving the source base station and the MME Code of the MME where the UE camps is the same as one MME Code in the MME Code set, the source base station determines that the target base station serves the source base station and the UE The SI link between the MMEs that are resident is normally available, and the mobility management of the EPC redirection is not required, and the source base station performs X2 link switching with the target base station. For example, when the MME Code serving the source base station and the MME of the UE camping is different from any MME Code in the MME Code set, the source base station determines the target base station and serves the source. The base station and the S1 link between the MMEs in which the UE resides are abnormally unavailable, and mobility management of EPC redirection is required, and the source base station performs S1 link switching with the target base station. Therefore, in this embodiment, the S1 link state information between the target base station and the MME serving the target base station sent by the target base station to the source base station may be used to indicate that the target base station serves the source base station and the UE resides. Whether the S1 link between the MMEs is normal, and the S2 link switch or the X2 link switch is performed between the source base station and the target base station, and the source base station is successfully switched to the target base station, so that the cell handover from the source base station to the target base station is implemented. The next cell. Another embodiment of the present invention provides a method for switching between base stations. As shown in FIG. 4, the method includes:

501 : 第一基站向第二基站发送服务于所述第一基站的 MME群组的第一 MME密钥（筒称 MME Code )集合，所述第一 MME Code集合中的 MME Code所代表的 MME与所述第一基站间的 S1链路正常。 501: The first base station sends, to the second base station, a first MME key (the MME Code) set of the MME group serving the first base station, and the MME represented by the MME Code in the first MME Code set. The S1 link with the first base station is normal.

502: 所述第一基站接收所述第二基站发送的服务于所述第二基站的 MME群组的第二 MME Code集合，所述第二 MME Code集合中的 MME Code所代表的 MME与所述第二基站间的 S1链路正常。 502: The first base station receives a second MME Code set that is sent by the second base station and serves the MME group of the second base station, and the MME and the MME code represented by the second MME Code set. The S1 link between the second base stations is normal.

503: 当第一基站 /第二基站向第二基站 /第一基站发送切换请求消息时，所述第一基站 /第二基站根据所述第二基站 /第一基站、与服务于所述第一基站 /第二基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 SI链路状态信息，确认进行 X2链路切换或 S1链路切换。在 501、 502中，第一基站获取第一 MME Code集合、及第二基站获取第二 MME Code集合的方法可以参考上一实施例中 401的相关描述，在此不再赘述。在 503 , 当第一基站 /第二基站分别具有第一 MME Code 及第二 MME Code时，无论 UE将要驻留在哪个基站，上述 UE驻留的基站均能在发起切换请求时，获取对端基站与 UE驻留的 MME间的 S1链路状态信息。例如，当 UE驻留在第一基站时，第一基站可以通过第一 MME Code 集合获取 UE驻留的 MME的 MME Code。同时，第一基站接收第二基站发送的第二 MME Code集合。当第一基站向第二基站发送切换请求消息时，第一基站比对所述 UE驻留的 MME的 MME Code与所述第二 MME Code 集合中的 MME Code是否相同。相同，则所述第一基站获悉所述第二基站与服务于所述第一基站且所述 UE驻留的 MME间的 S1链路正常，进行 X2 链路切换。不同，则所述第一基站获悉所述第二基站与服务于所述第一基站且所述 UE驻留的 MME间的 S1链路异常，进行 S1链路切换。又如，当 UE驻留在第二基站时，第二基站可以通过第二 MME Code 集合获取 UE驻留的 MME的 MME Code。同时，第二基站接收第一基站发送的第一 MME Code。当第二基站向第一基站发送切换请求消息时，第二基站比对所述 UE驻留的 MME的 MME Code与所述第一 MME Code集合中的 MME Code是否相同。相同，则所述第二基站获悉所述第一基站与服务于所述第二基站且所述 UE驻留的 MME间的 S1链路正常，进行 X2链路切换。不同，则所述第二基站获悉所述第一基站与服务于所述第二基站且所述 UE驻留的 MME间的 S1链路异常，进行 S1链路切换。 503: When the first base station/second base station sends a handover request message to the second base station/first base station, the first base station/second base station according to the second base station/first base station, and serving the first The SI link state information between the base station/second base station and the mobility management entity Mobile Management Entity (MME) where the UE camps, confirms that X2 link switching or S1 link switching is performed. For the 501, 502, the first base station obtains the first MME Code set, and the second base station obtains the second MME Code set. For reference, refer to the related description of 401 in the previous embodiment, and details are not described herein again. At 503, when the first base station/second base station has the first MME Code and the second MME Code, respectively, the base station where the UE camps can obtain the opposite end when the handover request is initiated, regardless of which base station the UE is to camp on. S1 link state information between the base station and the MME where the UE resides. For example, when the UE camps on the first base station, the first base station may acquire the MME Code of the MME where the UE resides through the first MME Code set. At the same time, the first base station receives the second MME Code set sent by the second base station. When the first base station sends a handover request message to the second base station, the first base station compares whether the MME Code of the MME that the UE camps on is the same as the MME Code in the second MME Code set. If the same, the first base station learns that the S1 link between the second base station and the MME serving the first base station and the UE is normal, and performs X2 link switching. Different, the first base station learns that the S1 link between the second base station and the MME serving the first base station and the UE is abnormal, and performs S1 link switching. For another example, when the UE camps on the second base station, the second base station may obtain the MME Code of the MME where the UE resides through the second MME Code set. At the same time, the second base station receives the first MME Code sent by the first base station. When the second base station sends a handover request message to the first base station, the second base station compares whether the MME Code of the MME that the UE camps on is the same as the MME Code in the first MME Code set. In the same manner, the second base station learns that the S1 link between the first base station and the MME serving the second base station and the UE camping is normal, and performs X2 link switching. Different, the second base station learns that the S1 link between the first base station and the MME serving the second base station and the UE is abnormal, and performs S1 link switching.

本领域的技术人员可以理解，在本实施例中，发起切换请求消息的第一基站 /第二基站为源基站，接收切换请求的第一基站 /第二基站为目标基站。 It can be understood by those skilled in the art that in this embodiment, the first base station/second base station that initiates the handover request message is the source base station, and the first base station/second base station that receives the handover request is the target base station.

故，本实施例可以根据目标基站向源基站发送的目标基站与服务于目标基站的 MME间的 S1链路状态信息，指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S 1链路是否正常，以判决源基站与目标基站进行 SI链路切换或 X2链路切换，成功进行源基站向目标基站的切换，实现 UE自源基站下的小区切换至目标基站下的小区。本发明另一实施例提供一种基站间的切换方法，如图 5所示，包括：Therefore, in this embodiment, the S1 link state information between the target base station and the MME serving the target base station sent by the target base station to the source base station may be used to indicate that the target base station serves the source base station and the UE resides. Whether the S 1 link between the MMEs is normal, to determine the source base station and the target The base station performs the SI link handover or the X2 link handover, and successfully performs the handover of the source base station to the target base station, so that the cell handover from the source base station to the cell under the target base station is implemented. Another embodiment of the present invention provides a method for switching between base stations. As shown in FIG. 5, the method includes:

601 : 目标基站接收源基站发送的切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中。 601: The target base station receives a handover request message sent by the source base station, and is used to switch the user equipment User Equipment (UE) that provides the service by the source base station to the cell under the target base station.

602: 所述目标基站向所述源基站发送所述目标基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME )间的 S I链路状态信息，用于所述源基站确认进行 X2链路切换或 S 1链路切换。 602: The target base station sends, to the source base station, SI link state information between the target base station and a mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping, for The source base station confirms that X2 link switching or S1 link switching is performed.

本实施例的 601及 602可参考上述其他实施例基站间的切换方法中的相关描述，在此不再赘述。故，本实施例可以根据目标基站向源基站发送的目标基站与服务于源基站且 UE驻留的 MME间的 S1链路状态信息，指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路是否正常，以判决源基站与目标基站进行 S1链路切换或 X2链路切换，成功进行源基站向目标基站的切换，实现 UE自源基站下的小区切换至目标基站下的小区。本领域技术人员可以理解实现上述方法实施例的全部或部分流程可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，上述程序在执行时，执行包括上述方法实施例的流程；而前述的存储介质包括： ROM、 RAM , 磁碟或者光盘等各种可以存储程序代码的介质。 601 and 602 of this embodiment may refer to related descriptions in the method for switching between base stations in other embodiments, and details are not described herein again. Therefore, in this embodiment, the target base station may be instructed to serve the source base station according to S1 link state information between the target base station and the MME serving the source base station and the UE camped by the target base station. Whether the S1 link between the MMEs in the UE is normal, and the S2 link switch or the X2 link switch between the source base station and the target base station is determined, and the handover of the source base station to the target base station is successfully performed to implement the cell handover of the UE from the source base station. To the cell under the target base station. A person skilled in the art may understand that all or part of the process of implementing the above method embodiments may be completed by using hardware related to program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes the above The foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

本发明另一实施例提供一种基站，其主要结构可参考图 6所示，包括：发送单元 701 , 用于向目标基站发送切换请求消息，以便将所述基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中；处理单元 702 , 用于根据所述目标基站、与服务于所述基站且所述 UE 驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 SI链路状态信息，确认进行 X2链路切换或 S 1链路切换。 Another embodiment of the present invention provides a base station, and the main structure thereof is as shown in FIG. 6. The method includes: a sending unit 701, configured to send a handover request message to a target base station, so as to provide the user equipment User Equipment ( Switching to the cell under the target base station; the processing unit 702 is configured to serve the base station according to the target base station, and serve the UE The SI link state information between the mobile management entity Mobile Management Entity (MME), which is camped on, confirms the X2 link switch or the S1 link switch.

其中，所述基站还包括确认单元，用于确认服务于所述基站的 MME 群组和服务于所述目标基站的 MME群组具有相同的 MME群组标识 MME Group ID, 及所述基站和所述目标基站间的 X2链路正常，以便所述基站与所述目标基站进行 X2链路切换。其中，所述基站还包括第一接收单元，用于接收所述目标基站发送的所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1链路状态信息，以便当所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1 链路状态信息指示所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1链路异常时，所述基站终止与所述目标基站间的 X2链路切换，转而进行 S1链路切换。其中，所述第一接收单元，还用于接收所述目标基站发送的切换准备失败消息，所述切换准备失败消息包括所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1链路状态信息。其中，所述基站还包括获取单元，用于获取服务于所述基站且所述 UE 驻留的 MME的 MME密钥 MME Code; 及第二接收单元，用于接收所述目标基站发送的服务于所述目标基站的 MME群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常。其中，所述基站还包括判断单元，用于当所述服务于所述基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的一个 MME Code 相同时，判断所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1链路正常，所述基站与所述目标基站进行 X2链路切换；及当所述服务于所述基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的任意 MME Code均不相同时，判断所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1链路异常，所述基站与所述目标基站进行 S1 链路切换。 The base station further includes an acknowledgment unit, configured to confirm that the MME group serving the base station and the MME group serving the target base station have the same MME group identifier MME Group ID, and the base station and the The X2 link between the target base stations is normal, so that the base station performs X2 link switching with the target base station. The base station further includes a first receiving unit, configured to receive S1 link state information between the target base station and the MME serving the base station and the UE camped by the target base station, so as to be The S1 link state information between the target base station and the MME serving the base station and the UE camping indicates that the S1 link between the target base station and the MME serving the base station and the UE camping is abnormal. The base station terminates the X2 link switch with the target base station, and then performs an S1 link switch. The first receiving unit is further configured to receive a handover preparation failure message sent by the target base station, where the handover preparation failure message includes the target base station and an MME serving the base station and the UE camping S1 link status information. The base station further includes an acquiring unit, configured to acquire an MME key MME Code of the MME serving the base station and the UE camps, and a second receiving unit, configured to receive the service sent by the target base station The MME Code set of the MME group of the target base station, and the S1 link between the MME represented by the MME Code and the target base station in the MME Code set is normal. The base station further includes a determining unit, configured to determine, when the MME Code serving the eNB and the MME Code of the MME Code set in the MME Code set is the same as the MME Code in the MME Code set, An S1 link between the MME serving the base station and the UE camping is normal, the base station performs X2 link handover with the target base station; and when the serving the base station and the UE camps MME MME Code and the MME Code set When any of the MME codes is different, it is determined that the S1 link between the target base station and the MME serving the base station and the UE camps is abnormal, and the base station performs S1 link switching with the target base station.

其中，所述第二接收单元，还用于当所述基站和所述目标基站建立连接时，接收所述目标基站发送的连接建立请求消息或连接建立响应消息，所述连接建立请求消息或所述连接建立响应消息包括服务于所述目标基站的 MME群组的 MME Code集合。其中，所述第二接收单元，还用于当所述基站和所述目标基站间需要重新配置连接时，所述基站接收所述目标基站发送的配置更新消息或配置更新确认消息，所述配置更新消息或所述配置更新确认消息包括服务于所述目标基站的 MME群组的 MME Code集合。 The second receiving unit is further configured to: when the base station and the target base station establish a connection, receive a connection establishment request message or a connection establishment response message sent by the target base station, where the connection establishment request message or the The connection setup response message includes an MME Code set of MME groups serving the target base station. The second receiving unit is further configured to: when the base station and the target base station need to reconfigure a connection, the base station receives a configuration update message or a configuration update confirmation message sent by the target base station, where the configuration The update message or the configuration update acknowledgement message includes a set of MME Codes serving the MME group of the target base station.

本实施例的基站，用于实现上述基站间的切换方法中的源基站所执行的动作。例如，上述发送单元 701 用于执行一实施例基站间的切换方法中 301的动作，上述处理单元 702用于执行一实施例基站间的切换方法中 302 的动作。 The base station in this embodiment is configured to implement an action performed by a source base station in the handover method between the base stations. For example, the sending unit 701 is configured to perform the action of the method 301 in the method for switching between the base stations in an embodiment, and the processing unit 702 is configured to perform the action of 302 in the method for switching between the base stations in an embodiment.

故，本实施例可以根据目标基站向源基站发送的目标基站与服务于源基站且 UE驻留的 MME间的 S1链路状态信息，指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路是否正常，以判决源基站与目标基站进行 S1链路切换或 X2链路切换，成功进行源基站向目标基站的切换，实现 UE自源基站下的小区切换至目标基站下的小区。 Therefore, in this embodiment, the target base station may be instructed to serve the source base station according to S1 link state information between the target base station and the MME serving the source base station and the UE camped by the target base station. Whether the S1 link between the MMEs in the UE is normal, and the S2 link switch or the X2 link switch between the source base station and the target base station is determined, and the handover of the source base station to the target base station is successfully performed to implement the cell handover of the UE from the source base station. To the cell under the target base station.

本发明另一实施例提供一种基站，其主要结构可参考图 7所示，包括：接收单元 801 , 用于接收源基站发送的切换请求消息，以便将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述基站下的小区中；发送单元 802 , 用于向所述源基站发送所述基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME )间的 S 1 链路状态信息，以便所述源基站确认进行 Χ2链路切换或 S1链路切换。其中，所述基站还包括指示单元，用于经由所述基站与服务于所述源基站且所述 UE驻留的 ΜΜΕ间的 S1链路状态信息向所述源基站指示所述基站、与服务于所述源基站且所述 UE驻留的 ΜΜΕ间的 S1链路异常，用于所述源基站终止与所述基站间的 Χ2链路切换，转而进行 S1链路切换。其中，所述发送单元 802 ,还用于向所述源基站发送切换准备失败消息，所述切换准备失败消息包括所述基站与服务于所述源基站且所述 UE驻留的 ΜΜΕ间的 S1链路状态信息。 Another embodiment of the present invention provides a base station, and the main structure thereof is as shown in FIG. 7. The method includes: a receiving unit 801, configured to receive a handover request message sent by a source base station, to provide a service device for the source base station. The equipment (UE) is switched to the cell under the base station; the sending unit 802 is configured to send the base station to the source base station, and the mobility management entity Mobile Management Entity serving the source base station and the UE camping S 1 between ( MME ) Link state information, so that the source base station confirms to perform a 链路2 link switch or an S1 link switch. The base station further includes an indication unit, configured to indicate, by the base station, the base station and the service to the source base station via S1 link state information of the base station serving the source base station and the UE camping The S1 link between the source base station and the UE camping is abnormal, and the source base station terminates the Χ2 link switch with the base station, and then performs S1 link switching. The sending unit 802 is further configured to send a handover preparation failure message to the source base station, where the handover preparation failure message includes the base station and the S1 serving the source base station and the UE camping Link status information.

其中，所述发送单元 802 ,还用于向所述源基站发送服务于所述基站的 ΜΜΕ群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述基站间的 S1链路正常。 The sending unit 802 is further configured to send, to the source base station, an MME Code set of a group serving the base station, where the MME represented by the MME Code in the MME Code set is between the eNB and the base station. The S1 link is normal.

本实施例的基站，用于实现其他实施例基站间的切换方法中的目标基站所执行的动作。例如，上述接收单元 801可以用于执行一实施例中的 601 的动作，上述发送单元 802可以用于执行一实施例中的 602的动作。故，本实施例可以根据目标基站向源基站发送的目标基站与服务于源基站且 UE驻留的 MME间的 S1链路状态信息，指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路是否正常，以判决源基站与目标基站进行 S1链路切换或 X2链路切换，成功进行源基站向目标基站的切换，实现 UE自源基站下的小区切换至目标基站下的小区。 The base station in this embodiment is used to implement the actions performed by the target base station in the handover method between the base stations in other embodiments. For example, the receiving unit 801 can be used to perform the action of 601 in an embodiment, and the sending unit 802 can be used to perform the action of 602 in an embodiment. Therefore, in this embodiment, the target base station may be instructed to serve the source base station according to S1 link state information between the target base station and the MME serving the source base station and the UE camped by the target base station. Whether the S1 link between the MMEs in the UE is normal, and the S2 link switch or the X2 link switch between the source base station and the target base station is determined, and the handover of the source base station to the target base station is successfully performed to implement the cell handover of the UE from the source base station. To the cell under the target base station.

本发明另一实施例提供一种通讯***，其主要结构包括： Another embodiment of the present invention provides a communication system, the main structure of which includes:

一源基站、及一目标基站；所述源基站，用于向目标基站发送切换请求消息，以便将所述基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中；及根据所述目标基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME )间的 SI链路状态信息，进行 X2链路切换或 SI链路切换；所述目标基站，用于接收源基站发送的切换请求消息；及向所述源基站发送所述目标基站、与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息。 a source base station, and a target base station; the source base station, configured to send a handover request message to the target base station, to switch the user equipment User Equipment (UE) serving the base station to the cell under the target base station; And performing X2 link cutting according to the SI link state information between the target base station and the mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping Switching or SI link switching; the target base station is configured to receive a handover request message sent by the source base station; and send the target base station to the source base station, and the MME that serves the source base station and the UE resides S1 link state information.

本发明一实施例提供一种基站间的切换方法，包括： An embodiment of the present invention provides a method for switching between base stations, including:

31 : 目标基站接收源基站发送的 X2链路切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中。 31: The target base station receives the X2 link switch request message sent by the source base station, and is used to switch the user equipment User Equipment (UE) that provides the service by the source base station to the cell under the target base station.

32 : 所述目标基站经由服务于所述目标基站的第一移动管理实体 Mobility Management Entity ( MME )连接服务于所述源基站且所述 UE驻留的第二 MME。 32: The target base station connects to a second MME that serves the source base station and the UE camps via a first mobility management entity Mobility Management Entity (MME) serving the target base station.

33 : 所述目标基站与所述源基站进行 X2链路切换。 33: The target base station performs X2 link switching with the source base station.

在 31中，当所述源基站确认服务于所述源基站的 MME群组和服务于所述目标基站的 MME群组具有相同的 MME群组标识（筒称 MME Group ID )、及所述源基站和所述目标基站间的 X2链路正常时，所述源基站向所述目标基站发送 X2链路切换请求消息。此时，源基站默认源基站和目标基站由同样的 MME提供服务，且 X2链路可用，故，源基站和目标基站间的切换无需经过 MME的 S1链路，通过源基站和目标基站间的 X2链路可直接完成切换动作。 In 31, when the source base station confirms that the MME group serving the source base station and the MME group serving the target base station have the same MME group identifier (the MME Group ID), and the source When the X2 link between the base station and the target base station is normal, the source base station sends an X2 link switch request message to the target base station. At this time, the source base station defaults that the source base station and the target base station are served by the same MME, and the X2 link is available. Therefore, the handover between the source base station and the target base station does not need to pass through the S1 link of the MME, and passes between the source base station and the target base station. The X2 link can directly perform the switching action.

在本实施例中，通过两个标识符可以唯一标识一个 MME, 上述标识符分别为 MME Group ID和 MME密钥（筒称 MME Code )。源基站可以通过自身获取向其提供服务的 MME群组的 MME Group ID。例如，当源基站和服务于源基站的 MME群组建立 S1链路连接时，源基站可以获取服务于源基站的 MME群组的 MME Group ID。且，向源基站提供服务的 MME群组中的各个 MME具有相同的 MME Group ID , 及不同的 MME Code。同样，目标基站也可以通过自身获取向其提供服务的 MME群组的 MME Group ID。且，向目标基站提供服务的 MME群组中的各个 MME具有相同的 MME Group ID , 及不同的 MME Code。 In this embodiment, an MME can be uniquely identified by two identifiers, and the identifiers are respectively an MME Group ID and an MME key (called MME Code). Source base station can pass The MME Group ID of the MME group to which the service is itself obtained. For example, when the source base station and the MME group serving the source base station establish an S1 link connection, the source base station can acquire the MME Group ID of the MME group serving the source base station. And, each MME in the MME group that provides the service to the source base station has the same MME Group ID and different MME Codes. Similarly, the target base station can also obtain the MME Group ID of the MME group to which the target base station is served. Moreover, each MME in the MME group that provides the service to the target base station has the same MME Group ID and a different MME Code.

在本实施例中，源基站可以通过显性方式或隐形方式获悉源基站和目标基站间的 X2链路是否正常。例如，显性方式为，源基站可以通过源基站侧的状态标识获取 X2链路的状态。上述状态标识分别代表 X2链路的三种状态，包括：断开、繁忙、及正常。例如，当状态标识将 X2链路的状态标记为断开时，表示源基站和目标基站间的 X2链路的物理层还没有配置好， X2链路不可用。又如，当状态标识将 X2链路的状态标记为繁忙时，表示源基站和目标基站间的 X2链路的物理层已连接，但无法经由 X2链路传送数据， X2链路不可用。再如，当状态标识将 X2链路的状态标记为正常时，表示源基站和目标基站间的 X2链路的物理层已连接，且可以经由 X2链路传送数据， X2链路正常可用。又如，隐形方式为，源基站或目标基站向对端（源基站的对端为目标基站，同样，目标基站的对端为源基站。）传送数据，如果对端接收到上述数据，则表明源基站和目标基站间的 X2链路正常可用。本领域的技术人员可以理解，通过其他方法也可以获悉源基站和目标基站间的 X2链路是否正常，在此不再赘述。 In this embodiment, the source base station can learn whether the X2 link between the source base station and the target base station is normal in an explicit manner or a stealth manner. For example, the dominant mode is that the source base station can obtain the state of the X2 link by using the status identifier on the source base station side. The above status indicators represent the three states of the X2 link, including: disconnected, busy, and normal. For example, when the status indicator marks the status of the X2 link as disconnected, the physical layer of the X2 link between the source base station and the target base station is not configured yet, and the X2 link is unavailable. For another example, when the status indicator marks the status of the X2 link as busy, it indicates that the physical layer of the X2 link between the source base station and the target base station is connected, but the data cannot be transmitted via the X2 link, and the X2 link is unavailable. For another example, when the status indicator marks the status of the X2 link as normal, it indicates that the physical layer of the X2 link between the source base station and the target base station is connected, and data can be transmitted via the X2 link, and the X2 link is normally available. For example, the invisible mode is that the source base station or the target base station transmits data to the opposite end (the opposite end of the source base station is the target base station, and the opposite end of the target base station is the source base station.), if the peer end receives the above data, it indicates The X2 link between the source base station and the target base station is normally available. It can be understood by those skilled in the art that the X2 link between the source base station and the target base station is normal through other methods, and details are not described herein.

在 32中，当所述目标基站与服务于所述源基站且所述 UE驻留的第二 MME间的 S1链路状态异常时，所述目标基站经由第一 MME连接所述第二 MME。 In 32, when the S1 link state between the target base station and the second MME serving the source base station and the UE camping is abnormal, the target base station connects to the second MME via the first MME.

在本实施例中，因为 UE驻留在第二 MME中，故目标基站需要从第二 MME 中获取 UE 的用户信息后，才能完成在源基站和目标基站间正常的 X2链路切换。而当目标基站与第二 MME间的 S1链路状态异常时，目标基站与第二 MME间无法进行正常的数据通讯，则目标基站无法直接从第二 MME获取 UE的用户信息。第一 MME与第二 MME间建立连接，指的是第一 MME与第二 MME间可以通过 S10接口建立 S10链路的连接。通过目标基站与第一 MME间正常的 S 1链路状态，及第一 MME与第二 MME间正常的 S10链路状态，所述目标基站可以通过第一 MME 间接获取第二 MME中的所述 UE的用户信息。 In this embodiment, because the UE resides in the second MME, the target base station needs to obtain the user information of the UE from the second MME, and then the normal between the source base station and the target base station can be completed. X2 link switching. When the S1 link status between the target base station and the second MME is abnormal, the normal data communication cannot be performed between the target base station and the second MME, and the target base station cannot directly acquire the user information of the UE from the second MME. A connection is established between the first MME and the second MME, where the connection between the first MME and the second MME can be established through the S10 interface. The target base station may indirectly obtain the foregoing in the second MME by using the first MME by using a normal S1 link state between the target eNB and the first MME, and a normal S10 link state between the first MME and the second MME. User information of the UE.

在本实施例中，上述 UE的用户信息可以为与 UE相关的安全性上下文、漫游限制、 UE能力信息等。 In this embodiment, the user information of the UE may be a security context, a roaming restriction, a UE capability information, and the like related to the UE.

在 33中，第一 MME向目标基站发送的路径切换确认消息中携带 UE 的用户信息，随后，目标基站向源基站发送释放 UE上下文消息，通知源基站 X2链路切换已经顺利完成，可以释放原先占用的资源。 In 33, the path switching acknowledgement message sent by the first MME to the target base station carries the user information of the UE, and then the target base station sends a release UE context message to the source base station, notifying the source base station that the X2 link switch has been successfully completed, and the original can be released. Occupied resources.

故，本实施例可以在目标基站与服务于源基站且 UE驻留的 MME间的 S1链路状态异常时，间接获取 UE的用户信息，成功进行源基站向目标基站的 X2链路切换，实现 UE自源基站下的小区切换至目标基站下的小区。 Therefore, in this embodiment, when the S1 link state between the target base station and the MME serving the source base station and the UE camping is abnormal, the user information of the UE is indirectly obtained, and the X2 link switching of the source base station to the target base station is successfully performed. The UE switches from the cell under the source base station to the cell under the target base station.

本发明另一实施例提供一种基站间的切换方法，包括： Another embodiment of the present invention provides a method for switching between base stations, including:

41 : 源基站向目标基站发送 X2链路切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中。 The source base station sends an X2 link switch request message to the target base station, where the user equipment User Equipment (UE) serving the source base station is switched to the cell under the target base station.

42: 当服务于源基站且 UE驻留的第二 MME与所述目标基站间的 S1 链路异常时，所述目标基站发送获取所述 UE的用户信息的指示至服务于所述目标基站的第一 MME。 The target base station sends an indication of acquiring user information of the UE to serve the target base station when the S1 link between the second MME and the target base station that the UE camps on is abnormal. First MME.

43: 所述第一 MME与所述第二 MME间建立连接。 43: Establish a connection between the first MME and the second MME.

44:所述第一 MME将获取所述 UE的用户信息的指示发送至所述第二 MME。 44: The first MME sends an indication of acquiring user information of the UE to the second MME.

45: 所述第二 MME发送所述 UE的用户信息至所述第一 MME。 46: 所述目标基站接收所述第一 MME转发的所述 UE的用户信息。45: The second MME sends user information of the UE to the first MME. 46: The target base station receives user information of the UE forwarded by the first MME.

47: 所述目标基站向所述源基站发送释放 UE上下文消息，用于完成源基站与目标基站间的 X2链路切换。 47: The target base station sends a release UE context message to the source base station, where the X2 link switch between the source base station and the target base station is completed.

本实施例的 41可以参考上一实施例 31的相关描述，在此不再赘述。在 42及 43中，当目标基站和服务于目标基站的 MME群组间建立 S1 链路连接时，目标基站可以获取上述 MME群组中的 MME的 MME Group ID。同样，当源基站和服务于源基站的 MME群组间建立 S1链路连接时，源基站也可以获取上述 MME群组中的 MME的 MME Group ID。当 UE准备接入源基站时，源基站根据 UE的用户信息选择驻留的 EPC, 且根据小区负载平衡，为 UE选择 EPC中的 MME群组中的合适的 MME, 让 UE得以驻留在上述 MME中。此时，源基站可以获取服务于源基站且 UE驻留的 MME的 MME Group ID。 For reference to 41 in this embodiment, reference may be made to the related description of the previous embodiment 31, and details are not described herein again. In 42 and 43, when the S1 link connection is established between the target eNB and the MME group serving the target eNB, the target eNB may obtain the MME Group ID of the MME in the MME group. Similarly, when the S1 link connection is established between the source eNB and the MME group serving the source eNB, the source eNB may also obtain the MME Group ID of the MME in the MME group. When the UE prepares to access the source base station, the source base station selects the camped EPC according to the user information of the UE, and selects a suitable MME in the MME group in the EPC for the UE according to the cell load balancing, so that the UE can reside in the foregoing. In the MME. At this time, the source base station may acquire the MME Group ID of the MME serving the source base station and the UE camped on.

在本实施例中，当第一 MME与第二 MME位于同一个 MME群组时，第一 MME与第二 MME具有相同的 MME Group ID。当目标基站通过相同的 MME Group ID 在 MME群组中找到第二 MME但无法与其进行数据通讯时，目标基站同样可以通过相同的 MME Group ID 在上述 MME群组中找到适合与其进行数据通讯的第一 MME, 并通过第一 MME与第二 MME 间正常的 S 10链路，间接获取第一 MME中的 UE的用户信息。 In this embodiment, when the first MME and the second MME are in the same MME group, the first MME and the second MME have the same MME Group ID. When the target base station finds the second MME in the MME group through the same MME Group ID but cannot communicate with the data, the target base station can also find the data suitable for data communication with the MME group through the same MME Group ID. An MME obtains user information of the UE in the first MME indirectly through a normal S 10 link between the first MME and the second MME.

在本实施例中，所述目标基站可以发送路径切换请求消息（ Path Switch Request )至所述第一 MME, 所述路径切换请求消息包含所述获取所述 UE 的用户信息的指示。 In this embodiment, the target base station may send a path switch request message (Path Switch Request) to the first MME, where the path switch request message includes the indication of acquiring the user information of the UE.

在 44中，第一 MME向第二 MME发送路径切换请求消息，所述路径切换请求消息携带有所述获取所述 UE的用户信息的指示。 In 44, the first MME sends a path switch request message to the second MME, where the path switch request message carries the indication of acquiring the user information of the UE.

在 45中，因为 UE本身就驻留在第二 MME中，故第二 MME可以通过自身获取 UE的用户信息，并将上述 UE的用户信息通过 S10链路发送至第一 MME。在本实施例中，所述第二 MME向所述第一 MME发送路径切换确认消息，所述路径切换确认消息包含所述 UE的用户信息。 In the 45th, because the UE itself resides in the second MME, the second MME can acquire the user information of the UE by itself, and send the user information of the UE to the first MME through the S10 link. In this embodiment, the second MME sends a path switch confirmation message to the first MME, where the path switch confirmation message includes user information of the UE.

在 46中，目标基站接收第一 MME转发的路径切换确认消息，所述路径切换确认消息包含所述 UE的用户信息。 In 46, the target base station receives a path switch acknowledgement message forwarded by the first MME, where the path switch acknowledgement message includes user information of the UE.

51：服务于源基站且 UE驻留的第二 MME连接服务于目标基站的第一 MME。 51: The second MME serving the source base station and the UE camping serves the first MME serving the target base station.

52: 所述第二 MME经由所述第一 MME连接所述目标基站，用以当所述源基站向所述目标基站发送 X2链路切换请求消息时，所述目标基站与所述源基站进行 X2链路切换。 The second MME is connected to the target base station by using the first MME, where the target base station performs the X2 link switch request message with the source base station when the source base station sends an X2 link switch request message to the target base station. X2 link switching.

本实施例的 51及 52可参考上述其他实施例基站间的切换方法中的相关描述，在此不再赘述。 References 51 and 52 of the present embodiment can be referred to the related description in the method for switching between base stations in the other embodiments, and details are not described herein again.

本发明另一实施例提供一种基站，包括： Another embodiment of the present invention provides a base station, including:

接收单元 61 , 用于接收源基站发送的 X2链路切换请求消息，以便将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述基站下的小区中； The receiving unit 61 is configured to receive an X2 link switch request message sent by the source base station, to switch the user equipment User Equipment (UE) that provides the service by the source base station to the cell under the base station;

连接单元 62, 用于经由服务于所述基站的第一 MME连接服务于所述源基站且所述 UE驻留的第二 MME; 及 a connecting unit 62, configured to connect, by using a first MME serving the base station, a second MME serving the source base station and the UE camping; and

切换单元，用于与所述源基站进行 X2链路切换。 And a switching unit, configured to perform X2 link switching with the source base station.

本实施例的基站，用于实现上述基站间的切换方法中的目标基站所执行的动作。例如，上述接收单元 61用于执行一实施例基站间的切换方法中 31的动作，上述连接单元 62用于执行一实施例基站间的切换方法中 32的动作。 The base station in this embodiment is used to implement the target base station in the handover method between the base stations. The action of the line. For example, the receiving unit 61 is configured to perform the action of the method 31 in the method for switching between the base stations in an embodiment, and the connecting unit 62 is configured to perform the action of the method 32 in the method of switching between the base stations in an embodiment.

本发明另一实施例提供一种移动管理实体 MME, 包括： Another embodiment of the present invention provides a mobility management entity MME, including:

连接单元 71 , 用于连接服务于目标基站的第一 MME及服务于源基站且所述 UE驻留的 MME, 以便所述 MME经由所述第一 MME连接所述目标基站，用以当所述源基站向所述目标基站发送 X2链路切换请求消息时，所述目标基站与所述源基站进行 X2链路切换。 a connecting unit 71, configured to connect a first MME serving the target base station and an MME serving the source base station and the UE camping, so that the MME connects to the target base station via the first MME, to be used by the When the source base station sends an X2 link switching request message to the target base station, the target base station performs X2 link switching with the source base station.

本实施例的移动管理实体，用于实现上述实施例基站间的切换方法中的服务于源基站且 UE驻留的第二 MME所执行的动作。例如，上述连接单元 71可以用于执行一实施例中的 51的动作。 The mobility management entity of this embodiment is configured to implement the action performed by the second MME serving the source base station and camped by the UE in the handover method between the base stations in the foregoing embodiment. For example, the above connection unit 71 can be used to perform the actions of 51 in an embodiment.

本发明另一实施例提供一种网元管理***，包括： Another embodiment of the present invention provides a network element management system, including:

一服务于目标基站的第一 MME、及一服务于源基站且所述 UE驻留的第二 MME; a first MME serving the target base station, and a second MME serving the source base station and the UE camping;

所述第一 MME, 用于连接所述第二 MME; The first MME is configured to connect to the second MME;

所述第二 MME, 用于连接所述第一 MME, 以便所述第二 MME经由所述第一 MME连接所述目标基站，用以当所述源基站向所述目标基站发送 X2链路切换请求消息时，所述目标基站与所述源基站进行 X2链路切换。 The second MME is configured to connect to the first MME, so that the second MME connects to the target base station by using the first MME, and is configured to send, by the source base station, an X2 link switch to the target base station. When the message is requested, the target base station performs X2 link switching with the source base station.

故，本实施例可以在目标基站与服务于源基站且 UE驻留的 MME间的 S1链路状态异常时，间接获取 UE的用户信息，成功进行源基站向目标基站的 X2链路切换，实现 UE自源基站下的小区切换至目标基站下的小区。 Therefore, in this embodiment, when the S1 link status between the target base station and the MME serving the source base station and the UE camping is abnormal, the user information of the UE is indirectly obtained, and the source base station successfully performs the target base station to the target base station. The X2 link switching implements handover of the cell from the source base station to the cell under the target base station.

在本申请所提供的几个实施例中，应该理解到，所揭露的***，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。 In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。 In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备（可以是个人计算机，服务器，或者网络设备等）执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括： U盘、移动硬盘、只读存储器（ ROM, Read-Only Memory )、随机存取存储器 ( RAM, Random Access Memory )、磁碟或者光盘等各种可以存储程序代码的介质。 The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program code. .

本领域技术人员可以理解实施例中的装置中的模块可以按照实施例描述进行分布于实施例的装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个模块，也可以进一步拆分成多个子模块。 Those skilled in the art can understand that the modules in the apparatus in the embodiment can be described in accordance with the embodiments. In the apparatus distributed in the embodiment, the corresponding change may also be made in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

本领域技术人员可以理解，本发明实施例中装置模块的划分为功能划分，实际具体结构可以为上述功能模块的拆分或合并。以上实施例的序号仅仅为了描述，不代表实施例的优劣。权利要求的内容记载的方案也是本发明实施例的保护范围。 It can be understood by those skilled in the art that the division of the device modules in the embodiments of the present invention is a functional division, and the actual specific structure may be the splitting or merging of the above functional modules. The serial numbers of the above embodiments are merely for the description, and do not represent the advantages and disadvantages of the embodiments. The solution described in the claims is also the scope of protection of the embodiments of the present invention.

最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。 It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

权利要求站间的切换方法，其特征在于，包括：源基站向目标基站发送切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中；所述源基站根据所述目标基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME )间的 SI链路状态信息，确认进行 X2链路切换或 S1链路切换。 The method for switching between stations in the claim, comprising: sending, by the source base station, a handover request message to the target base station, where the user equipment User Equipment (UE) serving the source base station is switched to the cell under the target base station Determining, by the source base station, the X2 link switch or the SI link state information between the target base station and the mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping S1 link switching.

权利要求 1 所述的方法，其特征在于，所述源基站向目标基站发送切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中，包括：所述源基站确认服务于所述源基站的 MME群组和服务于所述目标基站的 MME群组具有相同的 MME群组标识 MME Group ID、及所述源基站和所述目标基站间的 X2链路正常；所述源基站向所述目标基站发送 X2链路切换请求消息，用于所述源基站与所述目标基站进行 X2链路切换。 The method according to claim 1, wherein the source base station sends a handover request message to the target base station, where the user equipment User Equipment (UE) serving the source base station is switched to the cell under the target base station. The method includes: the source base station confirming that the MME group serving the source base station and the MME group serving the target base station have the same MME group identifier MME Group ID, and the source base station and the target The X2 link between the base stations is normal; the source base station sends an X2 link switch request message to the target base station, where the source base station performs X2 link switch with the target base station.

权利要求 2所述的方法，其特征在于，所述源基站根据所述目标基站与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 SI链路状态信息，确认进行 X2 链路切换或 S1链路切换，包括：所述源基站接收所述目标基站发送的所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息；当所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息指示所述目标基站与服务于所述源基站且所述 UE 驻留的 MME间的 SI链路异常时，所述源基站终止与所述目标基站的 X2链路切换，转而进行 S1链路切换。权利要求 3所述的方法，其特征在于，所述源基站接收所述目标基站发送所述目标基站与服务于所述源基站且所述 UE 驻留的 MME间的 S 1链路状态信息，包括：所述源基站接收所述目标基站发送的切换准备失败消息，所述切换准备失败消息包括所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息。 The method according to claim 2, wherein the source base station is based on an SI link state between the target base station and a mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping on And determining, by the source base station, the S1 chain between the target base station and the MME serving the source base station and the UE camped by the target base station, where the source base station receives the X2 link switch or the S1 link switch. The state information of the S1 link state between the target base station and the MME serving the source base station and the UE camping indicates that the target base station serves the source base station and the UE When the SI link between the camping MMEs is abnormal, the source base station terminates the X2 link switching with the target base station, and then performs S1 link switching. The method according to claim 3, wherein the source base station receives, by the target base station, S1 link state information between the target base station and an MME serving the source base station and the UE camping, The method includes: the source base station receiving a handover preparation failure message sent by the target base station, where the handover preparation failure message includes an S1 link state between the target base station and an MME serving the source base station and the UE camping information.

权利要求 1 所述的方法，其特征在于，所述源基站向目标基站发送切换请求消息，用于将所述源基站提供的用户设备 User The method according to claim 1, wherein the source base station sends a handover request message to the target base station, where the user equipment provided by the source base station is used.

Equipment ( UE )切换至所述目标基站下的小区中前，包括：所述源基站获取服务于所述源基站且所述 UE驻留的 MME的 MME 密钥 MME Code; 所述源基站接收所述目标基站发送的服务于所述目标基站的 MME 群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常。 Before the equipment (UE) is switched to the cell in the target base station, the method includes: the source base station acquires an MME key MME Code of the MME that serves the source base station and the UE camps; the source base station receives the The MME Code set of the MME group serving the target base station, and the S1 link between the MME represented by the MME Code and the target base station in the MME Code set is normal.

权利要求 5所述的方法，其特征在于，所述源基站根据所述目标基站与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 SI链路状态信息，确认进行 X2 链路切换或 S1链路切换，包括： The method according to claim 5, wherein the source base station according to the SI link state between the target base station and a mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping Information, confirming the X2 link switch or S1 link switch, including:

当所述服务于所述源基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的一个 MME Code相同时，所述源基站获悉所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路正常，所述源基站与所述目标基站进行 X2链路切换；当所述服务于所述源基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的任意 MME Code均不相同时，所述源基站获悉所述目标基站与服务于所述源基站且所述 UE驻留的 MME 间的 S1链路异常，所述源基站与所述目标基站进行 S1链路切换。 7.如权利要求 5或 6所述的方法，其特征在于，所述源基站接收所述目标基站发送的服务于所述目标基站的 MME群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常，包括： When the MME Code serving the source base station and the MME that the UE camps on is the same as one MME Code in the MME Code set, the source base station learns that the target base station is serving the source base station And the S1 link between the MMEs in which the UE resides is normal, and the source base station performs X2 link switching with the target base station; When the MME Code serving the source base station and the MME that the UE camps on is different from any MME Code in the MME Code set, the source base station learns that the target base station is serving the The source base station and the S1 link between the MMEs in which the UE resides are abnormal, and the source base station performs S1 link switching with the target base station. The method according to claim 5 or 6, wherein the source base station receives an MME Code set of the MME group served by the target base station and served by the target base station, where the MME Code set The S1 link between the MME represented by the MME Code and the target base station is normal, and includes:

当所述源基站和所述目标基站建立连接时，所述源基站接收所述目标基站发送的 X2链路连接建立请求消息或 X2链路连接建立响应消息，所述 X2链路连接建立请求消息或所述 X2链路连接建立响应消息包括服务于所述目标基站的 MME群组的 MME Code集合。 When the source base station and the target base station establish a connection, the source base station receives an X2 link connection establishment request message or an X2 link connection establishment response message sent by the target base station, and the X2 link connection establishment request message Or the X2 link connection setup response message includes an MME Code set of MME groups serving the target base station.

8.如权利要求 5或 6所述的方法，其特征在于，所述源基站接收所述目标基站发送的服务于所述目标基站的 MME群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常，包括： The method according to claim 5 or 6, wherein the source base station receives an MME Code set of the MME group served by the target base station and served by the target base station, where the MME Code set The S1 link between the MME represented by the MME Code and the target base station is normal, and includes:

当所述源基站和所述目标基站间需要重新配置连接时，所述源基站接收所述目标基站发送的配置更新消息或配置更新确认消息，所述配置更新消息或所述配置更新确认消息包括服务于所述目标基站的 MME群组的 MME Code集合。 When the connection between the source base station and the target base station needs to be reconfigured, the source base station receives a configuration update message or a configuration update confirmation message sent by the target base station, where the configuration update message or the configuration update confirmation message includes An MME Code set serving the MME group of the target base station.

9.一种基站间的切换方法，其特征在于，包括：目标基站接收源基站发送的切换请求消息，用于将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中；所述目标基站向所述源基站发送所述目标基站、与服务于所述源基站且所述 UE 驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 SI链路状态信息，用于所述源基站确认进行 X2链路切换或 S1链路切换。 A method for switching between base stations, comprising: receiving, by a target base station, a handover request message sent by a source base station, where the user equipment User Equipment (UE) serving the source base station is switched to the target base station In the next cell; Transmitting, by the target base station, the target base station, the SI link state information between the target base station and a mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping, The source base station confirms that X2 link switching or S1 link switching is performed.

10.如权利要求 9所述的方法，其特征在于，还包括：所述目标基站经由所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息向所述源基站指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路异常，用于所述源基站终止与所述目标基站的 X2链路切换，转而进行 S 1 链路切换。 The method according to claim 9, further comprising: the target base station transmitting, by using the S1 link state information between the target base station and an MME serving the source base station and the UE camping Determining, by the source base station, an S1 link abnormality between the target base station and an MME serving the source base station and the UE camping, for the source base station to terminate the X2 link switch with the target base station, The S 1 link is switched.

11.如权利要求 9或 10所述的方法，其特征在于，所述目标基站向所述源基站发送所述目标基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME )间的 SI链路状态信息，包括： The method according to claim 9 or 10, wherein the target base station sends the target base station to the source base station, and a mobility management entity Mobile serving the source base station and the UE camped on SI link status information between Management Entities (MMEs), including:

所述目标基站向所述源基站发送切换准备失败消息，所述切换准备失败消息包括所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息。 The target base station sends a handover preparation failure message to the source base station, where the handover preparation failure message includes S1 link state information between the target base station and an MME serving the source base station and the UE camping on.

12.如权利要求 9所述的方法，其特征在于，所述目标基站向所述源基站发送所述目标基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME )间的 S 1链路状态信息，用于所述源基站确认进行 X2链路切换或 S1链路切换，包括：所述目标基站向所述源基站发送服务于所述目标基站的 MME群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常。 The method according to claim 9, wherein the target base station sends the target base station to the source base station, and a mobility management entity Mobile Management Entity serving the source base station and the UE camping on The S1 link state information between the MMEs is used by the source base station to confirm an X2 link switch or an S1 link switch, and the method includes: the target base station sending, to the source base station, an MME serving the target base station The MME Code set of the group, the S1 link between the MME represented by the MME Code and the target base station in the MME Code set is normal.

13.如权利要求 12所述的方法，其特征在于，还包括：当所述服务于所述源基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的一个 MME Code相同时，所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路正常，所述目标基站与所述源基站进行 X2链路切换；当所述服务于所述源基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的任意 MME Code均不相同时，所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路异常，所述目标基站与所述源基站进行 S 1链路切换。 The method according to claim 12, further comprising: when the MME Code of the MME serving the source base station and camped by the UE is compared with an MME Code in the MME Code set At the same time, the S1 link between the target base station and the MME serving the source base station and the UE camping is normal, the target base station performs X2 link switching with the source base station; When the source eNB and the MME Code of the MME that the UE camps on are different from any MME Code in the MME Code set, the target base station and the MME serving the source base station and the UE camping The S1 link is abnormal, and the target base station performs S1 link switching with the source base station.

14.如权利要求 12或 13所述的方法，其特征在于，所述目标基站向所述源基站发送服务于所述目标基站的 MME群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常，包括：当所述源基站和所述目标基站建立连接时，所述目标基站向所述源基站发送 X2链路连接建立请求消息或 X2 链路连接建立响应消息，所述 X2链路连接建立请求消息或所述 X2 链路连接建立响应消息包括服务于所述目标基站的 MME群组的 MME Code集合。 The method according to claim 12 or 13, wherein the target base station sends, to the source base station, an MME Code set of an MME group serving the target base station, and an MME in the MME Code set. The S1 link between the MME and the target base station represented by the code is normal, and includes: when the source base station and the target base station establish a connection, the target base station sends an X2 link connection establishment request message to the source base station. Or an X2 link connection setup response message, the X2 link connection setup request message or the X2 link connection setup response message comprising an MME Code set serving an MME group of the target base station.

15.如权利要求 12或 13所述的方法，其特征在于，所述目标基站向所述源基站发送服务于所述目标基站的 MME群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常，包括： The method according to claim 12 or 13, wherein the target base station sends, to the source base station, an MME Code set of an MME group serving the target base station, and an MME in the MME Code set. The S1 link between the MME represented by the code and the target base station is normal, and includes:

当所述源基站和所述目标基站间需要重新配置连接时，所述目标基站向所述源基站发送配置更新消息或配置更新确认消息，所述配置更新消息或所述配置更新确认消息包括服务于所述目标基站的 ΜΜΕ群组的 MME Code集合。 When the connection between the source base station and the target base station needs to be reconfigured, the target base station sends a configuration update message or a configuration update acknowledgement to the source base station. The configuration update message or the configuration update acknowledgement message includes an MME Code set of a group serving the target base station.

16.—种基站，其特征在于，包括：发送单元，用于向目标基站发送切换请求消息，以便将所述基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中；处理单元，用于根据所述目标基站、与服务于所述基站且所述 UE 驻留的移动管理实体 Mobile Management Entity ( MME )间的 SI链路状态信息，确认进行 X2链路切换或 S 1链路切换。 17.如权利要求 16所述的基站，其特征在于，还包括：确认单元，用于确认服务于所述基站的 MME群组和服务于所述目标基站的 MME群组具有相同的 MME群组标识 MME Group ID、及所述基站和所述目标基站间的 X2链路正常，以便所述基站与所述目标基站进行 X2链路切换。 16. A base station, comprising: a sending unit, configured to send a handover request message to a target base station, to switch a user equipment User Equipment (UE) serving the base station to a cell in the target base station a processing unit, configured to confirm, according to the target base station, the SI link state information between the mobile management entity (MME) serving the base station and the mobile management entity (the MME) where the UE camps, perform X2 link switching or S 1 link switching. The base station according to claim 16, further comprising: an acknowledgment unit, configured to confirm that an MME group serving the base station and an MME group serving the target base station have the same MME group And identifying an MME Group ID, and an X2 link between the base station and the target base station is normal, so that the base station performs X2 link switching with the target base station.

18.如权利要求 17所述的基站，其特征在于，还包括：第一接收单元，用于接收所述目标基站发送的所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1链路状态信息，以便当所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1 链路状态信息指示所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S 1链路异常时，所述基站终止与所述目标基站间的The base station according to claim 17, further comprising: a first receiving unit, configured to receive the target base station sent by the target base station, and an MME serving the base station and the UE camping S1 link state information, so that when the target base station and the MME serving the base station and the UE camped, the S1 link state information indicates that the target base station serves the base station and the UE When the S1 link between the camping MMEs is abnormal, the base station terminates with the target base station

X2链路切换，转而进行 S1链路切换。 The X2 link is switched, and the S1 link is switched.

19.如权利要求 18所述的基站，其特征在于：所述第一接收单元，还用于接收所述目标基站发送的切换准备失败消息，所述切换准备失败消息包括所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1链路状态信息。如权利要求 16所述的基站，其特征在于，还包括：获取单元，用于获取服务于所述基站且所述 UE驻留的 MME 的 MME密钥 MME Code; 及第二接收单元，用于接收所述目标基站发送的服务于所述目标基站的 MME群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常。如权利要求 20所述的基站，其特征在于，还包括：判断单元，用于： The base station according to claim 18, wherein: the first receiving unit is further configured to receive a handover preparation failure message sent by the target base station, where the handover preparation failure message includes the target base station and a service At the base station And S1 link state information between the MMEs where the UE resides. The base station according to claim 16, further comprising: an obtaining unit, configured to acquire an MME key MME Code of the MME serving the base station and the UE camps; and a second receiving unit, configured to: Receiving, by the target eNB, an MME Code set of the MME group serving the target base station, where the S1 link between the MME represented by the MME Code and the target base station in the MME Code set is normal. The base station according to claim 20, further comprising: a determining unit, configured to:

当所述服务于所述基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的一个 MME Code相同时，判断所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1链路正常，所述基站与所述目标基站进行 X2链路切换；及 When the MME Code of the MME serving in the base station and the UE camps is the same as one MME Code in the MME Code set, determining that the target base station serves the base station and the UE resides The S1 link between the MMEs is normal, and the base station performs X2 link switching with the target base station; and

当所述服务于所述基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的任意 MME Code均不相同时，判断所述目标基站与服务于所述基站且所述 UE驻留的 MME间的 S1链路异常，所述基站与所述目标基站进行 S1链路切换。 Determining that the target base station serves the base station and the UE when the MME Code of the MME serving the base station and the UE camps is different from any MME Code in the MME Code set. The S1 link between the MMEs that are camped is abnormal, and the base station performs S1 link switching with the target base station.

如权利要求 20或 21所述的基站，其特征在于： A base station according to claim 20 or 21, characterized in that:

所述第二接收单元，还用于当所述基站和所述目标基站建立连接时，接收所述目标基站发送的连接建立请求消息或连接建立响应消息，所述连接建立请求消息或所述连接建立响应消息包括服务于所述目标基站的 MME群组的 MME Code集合。 The second receiving unit is further configured to: when the base station and the target base station establish a connection, receive a connection establishment request message or a connection establishment response message sent by the target base station, the connection establishment request message or the connection The setup response message includes a set of MME Codes serving the MME group of the target base station.

如权利要求 20-22任一项所述的基站，其特征在于： A base station according to any one of claims 20-22, characterized in that:

所述第二接收单元，还用于当所述基站和所述目标基站间需要重新配置连接时，所述基站接收所述目标基站发送的配置更新消息或配置更新确认消息，所述配置更新消息或所述配置更新确认消息包括服务于所述目标基站的 ΜΜΕ群组的 MME Code集合。 The second receiving unit is further configured to need to restart between the base station and the target base station When the connection is configured, the base station receives a configuration update message or a configuration update acknowledgement message sent by the target base station, where the configuration update message or the configuration update acknowledgement message includes an MME Code set of a group serving the target base station. .

—种基站，其特征在于，包括：接收单元，用于接收源基站发送的切换请求消息，以便将所述源基站提供服务的用户设备 User Equipment ( UE )切换至所述基站下的小区中；发送单元，用于向所述源基站发送所述基站、与服务于所述源基站且所述 UE驻留的移动管理实体 Mobile Management Entity ( MME ) 间的 SI链路状态信息，以便所述源基站确认进行 X2链路切换或 S1链路切换。 a base station, comprising: a receiving unit, configured to receive a handover request message sent by a source base station, to switch a user equipment User Equipment (UE) serving the source base station to a cell under the base station; a sending unit, configured to send, to the source base station, SI link state information between the base station and a mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping, so that the source The base station confirms that X2 link switching or S1 link switching is performed.

如权利要求 24所述的基站，其特征在于，还包括：指示单元，用于经由所述基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息向所述源基站指示所述基站、与服务于所述源基站且所述 UE驻留的 MME间的 S1链路异常 ,用于所述源基站终止与所述基站间的 X2链路切换，转而进行 S1链路切换。如权利要求 25所述的基站，其特征在于：所述发送单元，还用于向所述源基站发送切换准备失败消息，所述切换准备失败消息包括所述基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息。 The base station according to claim 24, further comprising: an indication unit, configured to send, by the base station, S1 link state information between the base station and an MME serving the source base station and the UE camping The source base station indicates that the S1 link between the base station and the MME serving the source base station and the UE camping is abnormal, and the source base station terminates the X2 link switch between the base station and the base station, and proceeds to S1 link switching. The base station according to claim 25, wherein: the sending unit is further configured to send a handover preparation failure message to the source base station, where the handover preparation failure message includes the base station and serving the source base station S1 link state information between MMEs in which the UE resides.

如权利要求 24所述的基站，其特征在于：所述发送单元，还用于向所述源基站发送服务于所述基站的 MME 群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述基站间的 S1链路正常。 The base station according to claim 24, wherein: the sending unit is further configured to send, to the source base station, an MME Code set of an MME group serving the base station, and an MME Code in the MME Code set. The S1 link between the represented MME and the base station is normal.

28.—种通讯***，其特征在于，包括：一源基站、及一目标基站；所述源基站，用于向目标基站发送切换请求消息，以便将所述基站提供服务的用户设备 User Equipment ( UE )切换至所述目标基站下的小区中；及根据所述目标基站、与服务于所述源基站且所述 UE 驻留的移动管理实体 Mobile Management Entity ( MME )间的 SI链路状态信息，进行 X2链路切换或 S1链路切换；所述目标基站，用于接收源基站发送的切换请求消息；及向所述源基站发送所述目标基站、与服务于所述源基站且所述 UE驻留的 MME间的 S 1链路状态信息。 A communication system, comprising: a source base station, and a target base station; the source base station, configured to send a handover request message to the target base station, to provide the user equipment User Equipment ( UE) handover to a cell under the target base station; and SI link state information between the target base station and a mobility management entity Mobile Management Entity (MME) serving the source base station and the UE camping Performing an X2 link switch or an S1 link switch; the target base station is configured to receive a handover request message sent by the source base station; and send the target base station to the source base station, and serve the source base station S1 link state information between MMEs hosted by the UE.

29.如权利要求 28所述的通讯***，其特征在于：所述源基站，还用于确认服务于所述源基站的 MME群组和服务于所述目标基站的 MME群组具有相同的 MME群组标识 MME Group ID、及所述基站和所述目标基站间的 X2链路正常。 30.如权利要求 29所述的通讯***，其特征在于：所述源基站，还用于接收所述目标基站发送的所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息，以便当所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息指示所述目标基站与服务于所述源基站且所述 UE 驻留的 MME间的 S1链路异常时，终止与所述目标基站间的 X2链路切换，转而进行 S1链路切换。 The communication system according to claim 28, wherein: the source base station is further configured to: confirm that the MME group serving the source base station and the MME group serving the target base station have the same MME The group identity MME Group ID, and the X2 link between the base station and the target base station are normal. The communication system according to claim 29, wherein: the source base station is further configured to receive, by the target base station, the target base station and an MME serving the source base station and the UE camping S1 link state information, so that when the target base station and the MME serving the source base station and the UE camped, the S1 link state information indicates that the target base station is serving the source base station and When the S1 link between the MMEs in which the UE camps is abnormal, the X2 link switching with the target base station is terminated, and the S1 link switching is performed instead.

31.如权利要求 28所述的通讯***，其特征在于：所述源基站，还用于接收所述目标基站发送的服务于所述目标基站的 MME群组的 MME Code集合，所述 MME Code集合中的 MME Code所代表的 MME与所述目标基站间的 S1链路正常。如权利要求 31所述的通讯***，其特征在于：所述源基站，还用于当所述服务于所述源基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的一个 MME Code 相同时，判断所述目标基站与服务于所述源基站且所述 UE驻留的The communication system according to claim 28, wherein: the source base station is further configured to receive, by the target base station, an MME Code set of an MME group serving the target base station, where the MME Code MME in the collection The S1 link between the MME represented by the Code and the target base station is normal. The communication system according to claim 31, wherein: the source base station is further configured to: when the MME code serving the source base station and the MME where the UE camps, and the MME Code set When an MME Code is the same, determining that the target base station is serving the source base station and the UE is camped on

MME间的 S1链路正常，与所述目标基站进行 X2链路切换；及当所述服务于所述源基站且所述 UE驻留的 MME的 MME Code与所述 MME Code集合中的任意 MME Code均不相同时，判断所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路异常，与所述目标基站进行 S1链路切换。 The S1 link between the MMEs is normal, and performs X2 link switching with the target base station; and when the MME Code serving the source base station and the MME where the UE camps, and any MME in the MME Code set When the codes are different, the S1 link between the target base station and the MME serving the source base station and the UE camping is abnormal, and the S1 link switching is performed with the target base station.

如权利要求 28-30任一项所述的通讯***，其特征在于：所述目标基站，还用于经由所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路状态信息向所述源基站指示所述目标基站与服务于所述源基站且所述 UE驻留的 MME间的 S1链路异常，用于所述源基站终止于所述目标基站间的 X2链路切换，转而进行 S1链路切换。 The communication system according to any one of claims 28 to 30, wherein: the target base station is further configured to perform S1 between the target base station and an MME serving the source base station and the UE camping. The link state information indicates, to the source base station, an S1 link abnormality between the target base station and an MME serving the source base station and the UE camping, where the source base station terminates between the target base stations. The X2 link is switched, and the S1 link is switched.