WO2009152738A1 - 用户设备分离的方法及其设备 - Google Patents

用户设备分离的方法及其设备 Download PDF

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Publication number
WO2009152738A1
WO2009152738A1 PCT/CN2009/072219 CN2009072219W WO2009152738A1 WO 2009152738 A1 WO2009152738 A1 WO 2009152738A1 CN 2009072219 W CN2009072219 W CN 2009072219W WO 2009152738 A1 WO2009152738 A1 WO 2009152738A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
management entity
separation
mobility management
network
Prior art date
Application number
PCT/CN2009/072219
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English (en)
French (fr)
Inventor
于益俊
张谦
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP16178573.8A priority Critical patent/EP3193528B1/en
Priority to EP09765377.8A priority patent/EP2291026B1/en
Priority to ES09765377.8T priority patent/ES2611482T3/es
Publication of WO2009152738A1 publication Critical patent/WO2009152738A1/zh
Priority to US12/971,612 priority patent/US8619712B2/en
Priority to US13/619,222 priority patent/US8861496B2/en
Priority to US14/500,062 priority patent/US9380552B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/06—De-registration or detaching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/32—Release of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1446—Reselecting a network or an air interface over a different radio air interface technology wherein at least one of the networks is unlicensed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections

Definitions

  • the present invention relates to the field of mobile communications, and more particularly to a technique for separating user equipment from a registered packet domain network.
  • 3GPP In order to meet the challenges of wireless broadband technology and maintain the leading edge of 3GPP networks, 3GPP
  • LTE Long Term Evolution
  • EPS evolved packet system
  • CS Domain Circuit Switched domain
  • CSFB CS fallback
  • MME Mobile Management Entity
  • the present invention aims to provide a method for network separation and an apparatus thereof, which can be separated from an EPS network according to an indication of separation type information to meet the needs of a communication service.
  • the embodiment of the invention discloses a method for separating user equipments.
  • the user equipment is simultaneously registered to the mobile management entity of the packet domain network and the mobile switching center of the circuit domain network, and the steps include: when the user equipment needs to be separated from the packet domain network
  • the mobile switching center receives the separation request carrying the separation type, the separation type indication is separated only from the packet domain network; after receiving the separation request, the mobile switching center deletes the context information of the packet domain core network entity, and clears the mobile exchange.
  • the connection between the hub and the mobility management entity is simultaneously registered to the mobile management entity of the packet domain network and the mobile switching center of the circuit domain network, and the steps include: when the user equipment needs to be separated from the packet domain network When the mobile switching center receives the separation request carrying the separation type, the separation type indication is separated only from the packet domain network; after receiving the separation request, the mobile switching center deletes the context information of the packet domain core network entity, and clears the mobile exchange.
  • the connection between the hub and the mobility management entity are examples of the packet domain network
  • the embodiment of the present invention discloses a mobility management entity, configured to perform context management of a user equipment in an evolved packet network, including: a triggering unit, configured to trigger a separation process of the user equipment; and an indication unit, configured to receive the trigger Notifying the unit, sending a message to the evolved base station, indicating, by the evolved base station, the user equipment to perform CS domain cell selection; the separating unit, configured to receive the notification of the trigger unit, send a message to the mobile switching center, and instruct the mobile switching center to delete the reserved The context of the mobility management entity, releasing or clearing the connection between the mobile switching center and the mobility management entity.
  • the method and the device disclosed in the embodiments of the present invention can solve the process of separating only the packet domain network in the CSFB. On this basis, the delay of the late handover can be reduced, and the communication service can be provided to the user more quickly, thereby improving the user experience. Meet the needs of operators.
  • 1 is an architectural diagram of a hybrid networking of a packet domain network and a circuit domain network
  • Embodiment 3 is a flowchart of separation of user equipment in Embodiment 2 of the present invention.
  • FIG. 4 is a flowchart of separation of user equipment in Embodiment 3 of the present invention
  • FIG. 5 is a structural block diagram of a mobility management entity in Embodiment 4 of the present invention.
  • FIG. 1 is a block diagram of a hybrid networking of a packet domain network and a circuit domain network.
  • the mobile management entity MME in the EPS network is connected to the mobile switching center (MSC) of the existing CS domain core network through an SGs interface.
  • MSC mobile switching center
  • the UE needs to first go to the GPRS/UMTS network and select a 2G.
  • the /3G cell is stationed and then the MO service is carried out.
  • the MSC When the UE is camped on the EPS network, and the MSC receives a terminal (MT, Mobile Terminated) service, the MSC sends a paging message to the mobility management entity MME of the EPS network through the SGs interface, and the MME pages the UE through the EPS network. After receiving the paging message, the UE needs to first go to the GPRS/UMTS network, and then select a 2G/3G cell to perform the subsequent processing of the MT service.
  • MT Mobile Terminated
  • Embodiments of the present invention provide for the use of a Detach Type in the separation process, by indicating the separation type as being separated only from the EPS network, according to which the separation from the EPS network is completed.
  • the mobility management entity may send a User Equipment Context Request (SI Initial UE Context Request) message to the evolved base station (eNodeB) through the S1 interface, and notify the UE to initiate the cell selection in the CS domain to facilitate subsequent CS domain communication services. That is, the user equipment selects to access a suitable CS domain cell for carrying out subsequent CS domain services according to the current location, signal strength and the like.
  • SI Initial UE Context Request User Equipment Context Request
  • FIG. 2 is a flowchart of separating user equipments in Embodiment 1 of the present invention, and the specific steps are as follows:
  • the UE sends a Detach Request message to the MME, where the message carries a Detach Type parameter, which is indicated as being separated only from the EPS network (EPS Detach Only).
  • EPS Detach Only EPS Detach Only
  • MME deletes the use a mobility management context and a bearer context of the user equipment; and the notification service gateway (Serving GW) deletes the bearer context associated with the user equipment stored on the Serving GW and the user equipment associated with the packet data network gateway (PDN GW) Context.
  • PDN GW packet data network gateway
  • the MME sends an International Mobile Subscriber Identity (IMSI) separation indication message to the MSC/VLR, where the message carries a separation type parameter, which may indicate that the EPS network is separated only.
  • IMSI International Mobile Subscriber Identity
  • Other messages can also be used to indicate separation only on the EPS network.
  • the MSC/VLR performs corresponding processing according to the type of separation. If it is only separated on the EPS network, the connection between the MSC/VLR and the MME is released or cleared, and the MSC deletes all contexts associated with the MME.
  • the MME learns that only the EPS network is separated according to the detach type, and the I1 sends a User Equipment Context Setup message to the eNodeB, and the message is originally used to establish the user in the eNodeB.
  • the context of the present invention may be used to notify the eNodeB to send a message to the UE, instructing the UE to perform CS domain cell selection. In this message, the separation indication is carried, and the eNodeB learns according to the message that the UE needs to perform CS domain selection.
  • the MME may also send other messages to the eNodeB, and the eNodeB instructs the UE to perform CS domain cell selection.
  • Step 203 and step 205 are not strictly sequential, and any step may be performed first, but step 204 must be performed after step 203 is completed.
  • the MME may send a separation accept message to the UE in a manner transparently transmitted by the eNodeB, indicating that the UE is separated.
  • the UE actively performs CS domain cell selection, and the UE selects a suitable access cell in the CS domain according to the current signal, such as the signal strength transmitted by the base station, to perform the CS domain.
  • the current signal such as the signal strength transmitted by the base station
  • This step is not a mandatory step in this embodiment.
  • the UE may also obtain an indication for performing cell selection in the CS domain through the subsequent step 210.
  • the eNodeB sends a handover request message to the MME, where the resource is pre-allocated on the target side, and the packet domain handover procedure is initiated.
  • the mobility management entity receives the handover request sent by the evolved base station, and performs handover processing with the serving general packet radio service support node.
  • the MME forwards the received handover request to the serving general packet radio service support node SGSN, and after receiving the handover request, the SGSN notifies the BSC (Base Station Controller base station controller) to pre-allocate resources for the UE, and
  • the resource information is sent to the MME. For example, information such as frequency points in the wireless access related information is transmitted to the MME.
  • the MME sends the resource information to the eNodeB.
  • the eNodeB forwards the received network resource information to the UE, and instructs the UE to perform CS domain cell selection. Based on these resource information, the UE can select a suitable cell and access the CS network.
  • the circuit domain cell selection referred to in the embodiment of the present invention is to select a cell with the best signal belonging to the PLMN (Public Land Mobile Network). If the UE saves some relevant information of the PLMN, such as frequency, scrambling code, and the like. The UE will first use this information for the cell search (Stored information cell selection). This allows faster access to the communication network.
  • PLMN Public Land Mobile Network
  • the MME After the MME sends the SI initial UE Context Setup message to the eNodeB, if the target network does not support the packet domain handover, or the target network does not support the dual transfer mode DTM (Dual Transfer Mode) that simultaneously processes the PS and CS information, the network assisted cell needs to be initiated. Change the process ie NACC (Network Assisted Cell Change).
  • NACC Network Assisted Cell Change
  • Steps 301 to 305 are the same as steps 201 to 205 described in Embodiment 1, and therefore will not be described again.
  • Step 306 The MME may send a separation accept message to the UE, indicating that the UE is separated. This step is not a mandatory step in this embodiment. When the MME does not perform this step, the UE passes the subsequent step. An indication to perform cell selection in the CS domain is also available in step 313.
  • Steps 307 to 313 after receiving the request for acquiring the circuit domain access network information from the evolved base station, the mobility management entity forwards the request to the serving general packet radio service support node; and sends the circuit domain access network information sent by the serving general packet radio service support node.
  • the eNodeB initiates the NACC process.
  • the method includes: taking the network access information of the CS network by using the MME, the SGSN (Serving GPRS Support Node), and the radio access network of the circuit domain, and sending the information to the UE through the SGSN, the MME, and the eNodeB, and instructing the UE to perform CS domain cell selection.
  • the UE can quickly access the CS network according to the received network access information.
  • Steps 401 to 404 are the same as steps 201 to 204 described in Embodiment 1, and therefore will not be described again.
  • Step 405 The MME may send a separation accept message to the UE, indicating that the UE is separated, and the split accept message includes an indication that the UE performs circuit domain cell selection.
  • Step 406 After receiving the message, the UE actively performs CS domain cell selection, and the UE selects a suitable access cell according to the current signal, such as the signal strength of the base station, to perform the CS domain service.
  • the current signal such as the signal strength of the base station
  • the separation process may be initiated by the MME or the Home Subscriber Server (HSS) or the Home Location Server (HLR).
  • HSS Home Subscriber Server
  • HLR Home Location Server
  • FIG. 5 it is a structural block diagram of the mobility management entity described in Embodiment 4 of the present invention, which is described in detail as follows:
  • the mobility management entity is a core network element in the evolved packet network, and the mobility management responsible for the control plane includes user context management, mobility state management, and the like.
  • the trigger unit, the indicating unit and the separating unit are included.
  • the triggering unit triggers the separation process by using a separate process for triggering the user equipment, including actively initiating and receiving the separation request message sent by the user equipment.
  • the triggering unit may include a first triggering subunit or a second triggering subunit, and the first triggering subunit is configured to receive the user equipment After the detach request message is sent, the detach process of the user equipment is triggered, and the second trigger sub-unit is used to initiate the separation process of the user equipment.
  • the indication unit is configured to: after the triggering unit triggers the separation process, receive a notification of the triggering unit, send a message, such as a user equipment context creation message, to the evolved base station (eNodeB), and indicate the user equipment by using the evolved base station. Perform CS domain cell selection.
  • the indication unit may be further configured to send a separation accept message to the UE, to notify the user equipment that the separation has succeeded.
  • the separating unit is configured to: after the triggering unit initiates a separation process of the user equipment, receive a notification of the triggering unit, send a message to the mobile switching center of the circuit domain, and notify the mobile switching center to delete related information of the mobile management entity that is reserved by the mobile switching center. Clear or release the connection to the mobile switching center, such as context information.
  • the mobility management entity may further include a switching unit, configured to perform subsequent handover processing after the user equipment is separated.
  • a forwarding unit configured to forward the request for acquiring the circuit domain access network information sent by the evolved base station to the mobile switching center, and forward the circuit domain access network information sent by the mobile switching center to the evolved base station.
  • the process of separating only the packet domain network in the CSFB can be solved, the delay of the late handover can be reduced, the communication service can be provided to the user more quickly, and the user experience is improved.

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  • Computer Networks & Wireless Communication (AREA)
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Description

用户设备分离的方法及其设备 本申请要求于 2008 年 6 月 17 日提交中国专利局、 申请号为 200810067876.2、 发明名称为 "用户设备分离的方法及其设备" 的中国专利 申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及移动通信领域， 尤其是涉及一种用户设备从所注册的分组域 网络分离的技术。
背景技术
为了应对无线宽带技术的挑战， 保持 3GPP网络的领先优势， 3GPP在
2004年底制定了长期演进计划 （LTE， Long Term Evolution) 。 该演进计划 定义了新的移动通信网络的架构， 称为演进的分组网络 （EPS , evolved packet system ) 。
由于电信运营商的很多业务都运行在现有的 GPRS/UMTS 电路域 （CS 域， Circuit Switched domain) 中， 因此又出现了通过将 EPS 网络连接到电 路域核心网的方法， 以实现在 EPS 网络中重用现有的电路域业务， 即 CS fallback" CS业务返回传统网络处理， 以下简称为 CSFB ) 业务， CSFB业务 的注册流程： UE ( Use Equipment , 用户设备） 发送附着请求到 MME (Mobile Management Entity, 移动管理实体） 。 MME收到后， 进行附着操 作。 在标准 Attach (附着） 流程中， MME收到了 HSS (Home Subscriber Server, 归属用户服务器） 发送的插入签约数据流程后， MME向 MSC/VLR (移动交换中心 /归属位置寄存器） 发起位置更新 LA (Location Update) 流 程， 将用户注册到 MSC/VLR。 MSC/VLR收到后， 保存 MME的地址等相 关信息， 并通过 SGs接口建立和 MME的连接， 执行标准的 CS域 Location Update流程。 上述位置更新流程结束后， MSC/VLR通知 MME位置更新流 程结束。 MME指示 UE附着流程完成。 至此 UE在 EPS网络和 CS网络中都 成功建立上下文和注册。
当用户设备需要从 EPS 网络分离时， 目前现有技术中没有相应的解决 方案。
发明内容
本发明旨在提供一种网络分离的方法及其设备， 可根据分离类型信息的 指示实现从 EPS网络分离， 满足通信业务的需要。
本发明实施例公开了一种用户设备分离的方法， 所述用户设备同时注册 到分组域网络的移动管理实体和电路域网络的移动交换中心上， 包括步骤： 当用户设备需要从分组域网络分离时， 移动交换中心接收携带有分离类型的 分离请求， 所述分离类型指示仅从分组域网络分离； 接收到所述分离请求 后， 移动交换中心删除分组域核心网络实体的上下文信息， 清除移动交换中 心和移动管理实体之间的连接。
本发明实施例公开了一种移动管理实体， 用于在演进的分组网络中进行 用户设备的上下文管理， 包括： 触发单元， 用于触发用户设备的分离流程； 指示单元， 用于接收所述触发单元的通知， 向演进基站发送消息， 通过演进 基站指示用户设备进行 CS域小区选择； 分离单元， 用于接收所述触发单元 的通知， 向移动交换中心发送消息， 指示移动交换中心删除其保留的移动管 理实体的上下文， 释放或清除移动交换中心和移动管理实体之间的连接。
应用本发明实施例公开的方法和设备， 可以解决在 CSFB中仅分离分组 域网络的处理， 在此基础上可以减少后期切换的时延， 更快地为用户提供通 信业务， 从而提升用户感受， 满足运营商的需求。
附图说明
图 1是分组域网络和电路域网络混合组网的架构图；
图 2是本发明实施例一中用户设备分离流程图；
图 3是本发明实施例二中用户设备分离流程图；
图 4是本发明实施例三中用户设备分离流程图； 图 5是本发明实施例四中移动管理实体的结构框图。
具体实施方式
图 1 是分组域网络和电路域网络混合组网的架构图， EPS 网络中的移 动管理实体 MME通过一个 SGs接口连接到现有 CS域核心网的移动交换中 心 (MSC) 上。 在该网络架构下， 当用户设备 UE (User Equipment) 驻扎 在 EPS网络， 但准备在 CS网络发起 CS始呼 （MO， Mobile Originating) 业 务时， UE需要先转到 GPRS/UMTS 网络， 选择一个 2G/3G的小区进行驻 扎， 然后再开展 MO业务。 当 UE驻扎在 EPS网络， 此时 MSC收到一个终 呼 （MT， Mobile Terminated) 业务时， MSC通过 SGs接口向 EPS网络的移 动管理实体 MME发送寻呼消息， MME通过 EPS网络对 UE进行寻呼， 当 UE收到该寻呼消息后， 需要先转到 GPRS/UMTS 网络， 然后选择一个 2G/3G的小区进行驻扎后再完成该 MT业务的后续处理。
本发明的实施例提供了在分离流程使用分离类型 （Detach Type) ， 通 过将分离类型指示为仅从 EPS 网络分离， 根据所述指示， 完成单独从 EPS 网络的分离。 在此基础上， 移动管理实体可以通过 S1接口将用户设备上下 文初始化请求 （SI Initial UE Context Request ) 消息发送给演进基站 (eNodeB ) ， 通知 UE发起 CS域的小区选择便于进行后续的 CS域通信业 务； 即用户设备根据当前的位置， 信号强度等条件， 选择接入一个合适的 CS域小区用于开展后续 CS域业务。
下面结合附图 2及具体实施例对本发明的技术方案进行详细的说明。 如图 2所示是本发明实施例一中用户设备分离的流程图， 具体步骤如 下：
201： UE向 MME发起分离请求消息 （Detach Request) ， 消息中携带 了分离类型 （Detach Type) 参数， 该参数指示为仅从 EPS 网络分离 （EPS Detach Only) 。
202： 发起分离流程， 释放 UE在 EPS 网络中的资源。 MME删除该用 户设备的移动性管理上下文和承载上下文； 并且通知服务网关 （Serving GW) 删除保存于 Serving GW上的所述用户设备相关的承载上下文和分组 数据网络网关 （PDN GW) 上的所述用户设备相关的上下文。
203： MME 向 MSC/VLR发送国际移动用户识别码 （IMSI) 分离指示 消息， 消息中携带了分离类型参数， 该参数可指示仅在 EPS 网络分离。 也 可以使用其他消息来指示仅在 EPS 网络分离。 当 MSC/VLR收到该消息 后， 即可获知此时仅仅需要进行 EPS网络的分离。
204： MSC/VLR根据分离类型做出相应的处理。 如果是仅在 EPS 网络 分离， 则释放或者清除 MSC/VLR和 MME之间的连接， MSC删除和 MME 相关的所有上下文。
205： MME收到分离请求消息后， 根据分离类型获知仅在 EPS 网络分 离， 贝 IJ向 eNodeB 发送用户设备上下文创建消息 （ S 1 initial UE Context Setup) ， 此消息原本用于在 eNodeB中建立该用户的上下文， 在本发明实施 例中可用来通知 eNodeB发送消息给 UE, 指示 UE进行 CS域小区选择。 在 此消息中其中携带分离指示， eNodeB根据此消息得知 UE需要进行 CS域小 区选择。
MME也可以发送其他消息给 eNodeB, 由 eNodeB指示 UE进行 CS域 小区选择。
步骤 203和步骤 205没有严格的先后顺序， 先执行任一步骤均可， 但是 步骤 204则必须在步骤 203完成后方可执行。
206： MME可通过 eNodeB透传的方式向 UE发送分离接受消息， 指示 UE分离完成。 在本发明的一个实施例中， UE接收到分离完成消息后， 主 动进行 CS域小区选择， UE在 CS域根据当前的信号如基站发射的信号强度 等信息选择合适接入的小区以进行 CS域的业务。 本步骤在本实施例中并非 必选步骤， 当 MME不执行此步骤时， UE通过后续步骤 210也可获得进行 CS域小区选择的指示。 207： eNodeB向 MME发送切换请求消息， 用于请求在目标侧预先分配 资源， 发起分组域切换流程。
208： 移动管理实体接收演进基站发送的切换请求， 并和服务通用分组 无线业务支持节点进行切换处理。 包括： MME将所接收到的切换请求转发 给服务通用分组无线业务支持节点 SGSN, SGSN收到所述切换请求后， 通 知 BSC (Base Station Controller基站控制器） 为 UE预先分配资源， 并将所 述资源信息发送给 MME。 例如将无线接入相关信息中的频点等信息发送给 MME。
209： MME将所述资源信息发给 eNodeB。
210： eNodeB将收到的网络资源信息转发给 UE, 并指示 UE进行 CS 域小区选择。 UE根据这些资源信息， 可选择一个合适的小区并接入到 CS 网络。
本发明实施例中所指的电路域小区选择， 目的是选择一个属于这个 PLMN (Public Land Mobile Network, 公共陆地移动通信网）的信号最好的小 区。 如果 UE保存有这个 PLMN的一些相关信息， 比如频率， 扰码等。 UE 就会首先使用这些信息进行小区搜索 （Stored information cell selection) 。 这样就可以较快的接入到通信网络。
当 MME向 eNodeB发送 SI initial UE Context Setup消息后， 当目标网 络不支持分组域切换， 或者目标网络不支持同时处理 PS和 CS信息的双传 输模式 DTM(Dual Transfer Mode) , 则需要发起网络辅助小区改变流程即 NACC (Network Assisted Cell Change) 。
现结合附图 3描述本发明实施二的详细步骤：
步骤 301至 305与实施例 1中描述的步骤 201至 205相同， 故不再予以 赘述。
步骤 306:MME可向 UE发送分离接受消息， 指示 UE分离完成。 在本 实施例中本步骤并非必选步骤， 当 MME不执行此步骤时， UE通过后续步 骤 313也可获得进行 CS域小区选择的指示。
步骤 307至 313 : 移动管理实体从演进基站接收获取电路域接入网信息 的请求后， 转发给服务通用分组无线业务支持节点； 并将服务通用分组无线 业务支持节点发送的电路域接入网信息转发给演进基站， eNodeB 发起 NACC流程。 包括： 通过 MME、 SGSN(Serving GPRS Support Node, 服务 GPRS支持节点)、 电路域的无线接入网取 CS网络的网络接入信息， 并通过 SGSN、 MME和 eNodeB下发给 UE， 并指示 UE进行 CS域小区选择。 UE 可根据所收到的网络接入信息快速地接入到 CS网络。
现结合附图 4描述本发明实施三的详细步骤：
步骤 401至 404与实施例 1中描述的步骤 201至 204相同， 故不再予以 赘述。
步骤 405: MME可向 UE发送分离接受消息， 指示 UE分离完成， 所述 分离接受消息包含 UE进行电路域小区选择的指示。
步骤 406: UE接收到该消息后， 主动进行 CS域小区选择， UE在 CS 域根据当前的信号如基站发射的信号强度等信息选择合适接入的小区以进行 CS域的业务。
在本发明的其它实施例中， 可由 MME或者归属用户服务器 （HSS ) 或 者归属位置寄器 （HLR) 发起分离流程， 其他流程则和上述两个实施例相 同， 本处也不再予以赘述。
如图 5所示， 是本发明实施例四所描述的移动管理实体的结构框图， 详 细介绍如下：
移动管理实体是演进的分组网络中的核心网络网元， 负责控制面的移动 性管理包括用户上下文管理、 移动状态管理等。 包括触发单元、 指示单元和 分离单元。 所述触发单元用触发用户设备的分离流程包括主动发起和接收到 用户设备发送的分离请求消息后触发分离流程。 相应地， 触发单元可包括第 一触发子单元或者第二触发子单元， 所述第一触发子单元用于接收用户设备 发送的分离请求消息后触发用户设备的分离流程， 所述第二触发子单元用于 主动发起用户设备的分离流程。 所述指示单元用于在所述触发单元触发分离 流程后， 接收触发单元的通知， 向演进基站 （eNodeB ) 发送消息如用户设 备上下文创建消息 （SI initial UE Context Setup) ， 通过演进基站指示用户 设备进行 CS域小区选择。 所述指示单元还可用于向 UE发送分离接受消 息， 通知所述用户设备分离已成功。 所述分离单元用于在所述触发单元发起 用户设备的分离流程后， 接收触发单元的通知， 向电路域的移动交换中心发 送消息， 通过通知移动交换中心删除其保留的移动管理实体的相关信息如上 下文信息等方式， 清除或释放与移动交换中心之间的连接。 在本发明的一个 实施例中， 移动管理实体还可包括切换单元， 用于当用户设备分离后进行后 续的切换处理。 或者还可包括转发单元， 用于将演进基站发送的获取电路域 接入网信息的请求转发给移动交换中心， 并将移动交换中心发送的电路域接 入网信息转发给演进基站。
应用本发明实施例公开的方法， 可以解决在 CSFB中仅分离分组域网络 的处理， 可以减少后期切换的时延， 更快地为用户提供通信业务， 提升用户 感受。
以上应用了优选实施例对本发明进行了描述， 但以上优选实施例仅用于 帮助理解本发明的核心思想及其实施方式， 因此本领域的一般技术人员在不 偏离本发明的思想和范围的情形下， 可以在具体实施方式及细节上有所改 变。 这些改变应当理解为实施了本发明。

Claims

权利要求书
1、 一种用户设备分离的方法， 所述用户设备同时注册到分组域网络和 电路域网络上， 其特征在于， 包括步骤：
当用户设备需要从分组域网络分离时， 移动管理实体向移动交换中心发 送携带有分离类型的分离请求， 所述分离类型指示从分组域网络分离； 移动交换中心接收到所述分离请求后， 清除移动交换中心和移动管理实 体之间的连接；
移动管理实体通过演进基站向用户设备发送消息， 指示用户设备进行电 路域小区的选择。
2、 根据权利要求 1所述的方法， 其特征在于， 当所述用户设备需要分 离时，
由用户设备向移动管理实体发送分离流程， 或者
由移动管理实体发起分离流程； 或者
由归属用户服务器 HSS发起分离流程。
3、 如权利要求 2所述方法， 其特征在于， 所述由移动管理实体向移动 管理实体发送分离流程包括： 由用户设备向移动管理实体发送分离请求， 其 中所述分离请求携带有分离类型， 所述分离类型指示仅从分组域网络分离； 或者
所述由移动管理实体发起分离流程包括： 由移动管理实体主动发起分离 请求， 其中所述分离请求携带有分离类型， 所述分离类型指示仅从分组域网 络分离； 或者
所述由归属用户服务器 HSS发起分离流程包括： 由归属用户服务器 HSS主动发起分离请求， 其中所述分离请求携带有分离类型， 所述分离类 型指示仅从分组域网络分离。
4、 根据权利要求 1或 2所述的方法， 其特征在于， 包括步骤： 清除移 动交换中心与移动管理实体之间的连接后， 移动管理实体向用户设备发送分 离接受消息， 通知分离完成。
5、 根据权利要求 4所述方法， 其特征在于， 用户设备接受到分离接受 消息后， 主动选择合适的小区并接入到网络。
6、 根据权利要求 1或 2所述的方法， 其特征在于， 所述移动管理实体 通过演进基站向用户设备发送消息， 指示用户设备进行电路域小区的选择包 括步骤：
移动管理实体接收演进基站发送的切换请求， 并和服务通用分组无线业 务支持节点进行切换处理。
7、 根据权利要求 1或 2所述的方法， 其特征在于， 所述移动管理实体 通过演进基站向用户设备发送消息， 指示用户设备进行电路域小区的选择包 括步骤： 移动管理实体从演进基站接收获取电路域接入网信息的请求后， 转 发给服务通用分组无线业务支持节点； 并将服务通用分组无线业务支持节点 发送的电路域接入网信息转发给演进基站。
8、 一种移动管理实体， 用于在演进的分组网络中进行用户设备的上下 文管理， 其特征在于， 包括：
触发单元， 用于触发用户设备的分离流程， 并通知分离单元； 分离单元， 用于接收所述触发单元的通知， 向移动交换中心发送消息， 清除移动交换中心和移动管理实体之间的连接；
指示单元， 用于接收所述触发单元的通知， 向演进基站发送消息， 通过 演进基站指示用户设备进行电路域小区选择。
9、 根据权利要求 8所述的移动管理实体， 其特征在于， 所述触发单元 包括第一触发子单元或者第二触发子单元；
所述第一触发子单元用于接收用户设备发送的分离请求后触发所述用户 设备的分离流程；
所述第二触发子单元用于主动发起分离流程。
10、 根据权利要求 8或 9所述的移动管理实体， 其特征在于， 进一步包 括切换单元或者转发单元；
所述切换单元用于接收演进基站发送的切换请求， 并和服务通用分组无 线业务支持节点进行切换处理；
所述转发单元用于从演进基站接收获取电路域接入网信息的请求后， 转 发给服务通用分组无线业务支持节点； 并将服务通用分组无线业务支持节点 发送的电路域接入网信息转发给演进基站。
11、 根据权利要求 8或 9所述的移动管理实体， 其特征在于， 所述指示 单元还用于向用户设备发送分离接受消息， 通知所述用户设备分离完成。
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EP2291026A1 (en) 2011-03-02
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US8619712B2 (en) 2013-12-31
US20130016700A1 (en) 2013-01-17
CN101610458B (zh) 2013-04-24
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CN101610458A (zh) 2009-12-23
EP3193528B1 (en) 2020-08-12
US9380552B2 (en) 2016-06-28
EP2291026B1 (en) 2016-11-02
US8861496B2 (en) 2014-10-14
US20150016423A1 (en) 2015-01-15
US20110085517A1 (en) 2011-04-14

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