WO2012155705A1 - 一种切换到家庭基站的切换方法及基站 - Google Patents

一种切换到家庭基站的切换方法及基站 Download PDF

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Publication number
WO2012155705A1
WO2012155705A1 PCT/CN2012/073318 CN2012073318W WO2012155705A1 WO 2012155705 A1 WO2012155705 A1 WO 2012155705A1 CN 2012073318 W CN2012073318 W CN 2012073318W WO 2012155705 A1 WO2012155705 A1 WO 2012155705A1
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WIPO (PCT)
Prior art keywords
handover
cell
target cell
base station
target
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PCT/CN2012/073318
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English (en)
French (fr)
Inventor
黄莹
谢峰
奚进
陈琳
祝建建
翟恒星
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012155705A1 publication Critical patent/WO2012155705A1/zh

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Classifications

    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/04—Reselecting a cell layer in multi-layered cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a handover method and a base station for handover to a home base station.
  • the home base station is a small, low-power base station that is mainly used in small indoor areas such as homes and offices.
  • the home base station is connected to the mobile operator core network through an indoor cable, a digital subscriber line (DSL) or a wired access device such as an optical fiber to provide a specific mobile subscriber network based access service.
  • DSL digital subscriber line
  • It is an effective complement to existing network deployments and can effectively improve indoor voice and high-speed data service coverage. It has many advantages, such as low cost, low power, simple access, plug and play, saving backhaul, compatibility with existing terminals, and improved network coverage.
  • HeNB home base station
  • the functions supported by the HeNB are basically the same as those of the eNB.
  • EPC Evolved Packet Core
  • the process is basically the same as that between the eNB and the EPC. Since the deployment of the HeNB is usually not planned by the mobile operator's network, the coverage is small and numerous. For more convenient management and to support a larger number of HeNBs, Under the Evolved UTRAN (E-UTRAN) architecture, it is also possible to enter a new Home eNB Gateway (HeNB GW) between the SeNB connection of the HeNB and the EPC.
  • the Mobility Management Entity (MME) is connected to the HeNB GW as an S1 proxy. There is an X2 direct interface between the HeNBs, which can perform load balancing, handover optimization, and information interaction.
  • CSG Closed Subscriber Group
  • each CSG has a unique identifier, that is, a CSG ID.
  • three different access modes are defined for the HeNB: CSG cell - corresponding closed mode HeNB, only UEs registered as members of the CSG group can access; hybrid cell - corresponding hybrid mode HeNB Any terminal can access, but a UE registered as a member of the CSG group can access with a higher priority member; an open (Open) cell - corresponding to an open mode HeNB, Any UE can be accessed.
  • the access mode and CSG ID of the HeNB are broadcast on the air interface.
  • the cell does not broadcast the CSG ID and the access mode, it is an open cell; if the cell broadcasts only the CSG ID, it is a CSG cell; if the cell broadcasts the CSG ID and the access mode with the value of "hybrid", it is a hybrid Community.
  • the core network and the UE respectively save a list of CSG IDs that the user can access as a member.
  • the mobile management entity is generally required.
  • MME Mobility Management Entity
  • the technical problem to be solved by the present invention is to provide a handover method and a base station for handover to a home base station, and the source base station performs access control.
  • an embodiment of the present invention provides a handover method for handover to a home base station, including:
  • the source base station receives a handover decision assisting cell for the user equipment (UE);
  • the source base station When the source base station performs the handover decision for the UE, if the target base station is the home base station, the S1 handover procedure or the X2 is initiated according to the target cell type and the handover decision assisting cell of the UE and the member status reported by the UE. Switch the process.
  • the X2 handover procedure is initiated, it is determined whether the X2 handover procedure is initiated in the case of the target cell being a hybrid cell or not.
  • the step of the source base station receiving the handover decision assisting cell for a certain UE includes: the source base station receiving the handover decision assisting cell from a mobility management entity (MME) or from another base station.
  • MME mobility management entity
  • the step of the source base station receiving the handover decision auxiliary cell from the MME includes: the initial context setup request message sent by the source base station by using the MME, or the handover request message of the S1 interface or the path transfer request acknowledgement message receiving station.
  • the handover decision auxiliary cell is described.
  • the step of the source base station receiving the handover decision auxiliary cell from another base station includes: the source base station receiving the handover decision auxiliary cell by using a handover request message of an X2 interface sent by another base station.
  • the handover decision auxiliary cell is used to indicate that the member status reported by the UE in the previous or previous handover process is consistent with or inconsistent with the member status determined by the core network element according to the user subscription information;
  • the step of determining whether to initiate the S1 handover procedure or the handover procedure according to the target cell type and the handover decision assisting cell of the UE and the member status reported by the UE includes:
  • the handover decision auxiliary cell value indicates that the handover is determined, and the member status reported by the UE indicates that the UE is the target cell member, and then the UE handover process to the target cell is determined; or
  • the handover decision auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the UE is the target cell member, and then the S1 handover process of initiating the UE to the target cell is determined; or
  • the handover decision auxiliary cell value is consistent, and the member status reported by the UE indicates that the UE is the target cell member, and then the X2 handover process of initiating the UE to the target cell by the identity is determined; or
  • the handover decision auxiliary cell value is consistent, and the member status reported by the UE indicates that the UE is not the target cell member, and then the X2 handover procedure of the initiating UE to the target cell by the non-membership is determined; or
  • the handover decision auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the UE is not a target cell member, and then the X2 handover procedure of the initiating UE to the target cell by the non-membership is determined; or
  • the target cell is a hybrid cell
  • the handover decision auxiliary cell value indicates inconsistency
  • the member status reported by the UE indicates that the UE is the target cell member
  • the S1 handover procedure of the initiating UE to the target cell is determined, or the initiating UE is determined to be non-member.
  • the X2 handover procedure to the target cell, or the X2 handover procedure of initiating the UE to the target cell by the membership.
  • the handover decision auxiliary cell value indicates inconsistency
  • the member status reported by the UE indicates that the UE is the target cell member
  • the step of determining the X2 handover procedure of the initiating UE to the target cell by the identity of the UE is performed. Also includes:
  • the source base station sends the handover determination auxiliary cell of the UE and the member status reported by the UE
  • the target base station is sent to the target home base station, and the target home base station determines whether the UE accesses the target cell as a member or a non-member.
  • the MME sends the UE determined by the MME to the target base station in the member state of the target cell.
  • An embodiment of the present invention further provides a base station that implements handover of a user equipment (UE) to a home base station, including a receiving module and a switching module, where:
  • UE user equipment
  • the receiving module is configured to receive a handover decision auxiliary cell for the UE
  • the switching module is configured to: when the handover decision for the UE is performed, if the target base station is a home base station, initiate an S1 handover according to the target cell type, the handover decision auxiliary cell of the UE, and the member status reported by the UE. The process is still the X2 switching process.
  • the switching module is further configured to: if it is determined that the X2 handover procedure is initiated, determine whether the X2 handover procedure is initiated in a membership or a non-membership in a case where the target cell is a hybrid cell.
  • the receiving module is configured to receive a handover decision auxiliary cell for a UE in the following manner:
  • the handover decision assistance cell is received from a mobility management entity (MME) or from other base stations.
  • MME mobility management entity
  • the receiving module is configured to receive the handover decision auxiliary cell from the MME in the following manner:
  • the receiving module receives the handover decision auxiliary cell by using an initial context setup request message sent by the MME or a handover request message or a path transfer request acknowledgement message of the S1 interface.
  • the receiving module is configured to receive the handover decision auxiliary cell from another base station in the following manner:
  • the receiving module receives the switching decision auxiliary cell by using a handover request message of an X2 interface sent by another base station.
  • the handover decision auxiliary cell is used to indicate that the member status reported by the UE in the previous or previous handover process and the member status determined by the core network element according to the user subscription information are one. Still inconsistent;
  • the switching module is configured to determine whether to initiate the S1 handover procedure or the X2 handover procedure according to the handover determination auxiliary cell of the UE and the member status reported by the UE in the following manner:
  • the handover decision auxiliary cell value is consistent, and the member status reported by the UE indicates that the UE is the target cell member, and then the X2 handover process of initiating the UE to the target cell is determined; or
  • the handover decision auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the UE is the target cell member, and then the S1 handover process of initiating the UE to the target cell is determined; or
  • the handover decision auxiliary cell value is consistent, and the member status reported by the UE indicates that the UE is the target cell member, and then the X2 handover process of initiating the UE to the target cell by the identity is determined; or
  • the handover decision auxiliary cell value is consistent, and the member status reported by the UE indicates that the UE is not the target cell member, and then the X2 handover procedure of the initiating UE to the target cell by the non-membership is determined; or
  • the handover decision auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the UE is not a target cell member, and then the X2 handover procedure of the initiating UE to the target cell by the non-membership is determined; or
  • the target cell is a hybrid cell
  • the handover decision auxiliary cell value indicates inconsistency
  • the member status reported by the UE indicates that the UE is the target cell member
  • the S1 handover procedure of the initiating UE to the target cell is determined, or the initiating UE is determined to be non-member.
  • the X2 handover procedure to the target cell, or the X2 handover procedure of initiating the UE to the target cell by the membership.
  • the base station further includes a sending module, where the switching module determines that the target cell is a hybrid cell, and the handover decision auxiliary cell value indicates an inconsistency, and the member status reported by the UE indicates that the local UE is a target cell member.
  • the handover decision auxiliary cell of the UE and the member status of the UE are sent to the target home base station, and the target home base station determines the UE to Membership is also a non-membership access target cell.
  • the present invention further provides a handover method for handover to a home base station, which includes: when a source base station performs a handover decision for a user equipment (UE), if the target base station is a home base station, determining whether to initiate the S1 handover procedure according to the target cell type X2 switching process.
  • a source base station performs a handover decision for a user equipment (UE)
  • UE user equipment
  • the step of determining whether to initiate the S1 handover process or the X2 handover process according to the target cell type includes:
  • the target cell determines the X2 handover procedure of the initiating UE.
  • the method further includes:
  • the source base station receives a handover decision assistance cell for the UE, where the handover decision assistance cell is used to indicate that the member status reported by the UE and the core network element are determined according to the user subscription information during the previous or previous handover process. Whether the member status is consistent or inconsistent;
  • the step of determining the X2 switching process of the initiating UE includes:
  • the handover decision auxiliary cell value is consistent, and the member status reported by the UE indicates that the UE is the target cell member, it is determined that the UE initiates the X2 handover procedure of the membership to the target cell; or if the handover determination auxiliary cell value indicates consistent, And the member status reported by the UE indicates that the UE is not a target cell member, and then the X2 handover process of initiating the UE to the target cell by the non-membership is determined; or
  • the handover determination auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the UE is not the target cell member, determining the X2 handover procedure of the initiating UE to the target cell by the non-membership; or
  • the handover determination auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the local UE is the target cell member, it is determined that the UE initiates the X2 handover procedure of the non-membership to the target cell, or determines that the initiating UE sends the membership to the target cell.
  • the X2 switching process If the handover determination auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the local UE is the target cell member, it is determined that the UE initiates the X2 handover procedure of the non-membership to the target cell, or determines that the initiating UE sends the membership to the target cell. The X2 switching process.
  • An embodiment of the present invention further provides another base station that implements handover of a UE to a home base station, including a switching module, where:
  • the switching module is configured to determine whether to initiate an S1 handover procedure or an X2 handover procedure according to the target cell type, if the target base station is a home base station when performing a handover decision for the UE.
  • the switching module is configured to: if the target cell is a hybrid cell, determine an X2 handover procedure of the initiating UE.
  • the foregoing base station further includes a receiving module, where:
  • the receiving module is configured to receive a handover decision assisting cell for the UE, where the handover determining auxiliary cell is used to indicate that the member status reported by the UE and the core network element according to the user in the previous or previous handover process are based on the user Whether the status of the member judged by the contract information is consistent or inconsistent;
  • the switching module is configured to: if the target cell is a hybrid cell, determine the X2 handover process of the initiating UE in the following manner:
  • the handover decision auxiliary cell value is consistent, and the member status reported by the UE indicates that the UE is the target cell member, it is determined that the UE initiates the X2 handover procedure of the membership to the target cell; or if the handover determination auxiliary cell value indicates consistent, And the member status reported by the UE indicates that the UE is not a target cell member, and then the X2 handover process of initiating the UE to the target cell by the non-membership is determined; or
  • the handover determination auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the UE is not the target cell member, determining the X2 handover procedure of the initiating UE to the target cell by the non-membership; or
  • the handover determination auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the local UE is the target cell member, it is determined that the UE initiates the X2 handover procedure of the non-membership to the target cell, or determines that the initiating UE sends the membership to the target cell.
  • the X2 switching process If the handover determination auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the local UE is the target cell member, it is determined that the UE initiates the X2 handover procedure of the non-membership to the target cell, or determines that the initiating UE sends the membership to the target cell. The X2 switching process.
  • the embodiment of the present invention provides a method for switching a home base station that is switched to a hybrid or CSG access mode, and optimizes the existing handover method.
  • the core network element is not required to perform access control, and the source base station performs the connection.
  • Incoming control can effectively simplify the switching process and reduce the switching delay.
  • FIG. 1 is a structural diagram of an E-UTRAN network deployed with a home base station according to an embodiment of the present invention
  • Embodiment 1 of the present invention is a schematic flowchart of Embodiment 1 of the present invention
  • 3 is a schematic diagram of a method for using a handover determination auxiliary cell when a target is a CSG cell according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic diagram of a method for using a handover determination auxiliary cell when the target is a hybrid cell according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 6 is a schematic flow chart of an application example 1 of the present invention.
  • Fig. 9 is a flow chart showing the application example 4 of the present invention. Preferred embodiment of the invention
  • Figure 1 depicts an E-UTRAN network architecture diagram with a home base station deployed. HeNB can pass HeNB
  • the GW connects to the MME as a SI proxy. If the HeNB connects to the MME through the HeNB GW as a SI proxy, the HeNB GW relays the UE-related SI signaling. There is an X2 direct interface between the HeNBs, which can be switched through the X2 direct interface. There may be an X2 direct interface between the macro base station and the home base station, such as the X2 interface between the eNB 3 and the HeNB 1 in FIG.
  • FIG. 2 depicts the flow of the solution in this embodiment, including the following steps:
  • Step 201 The source base station receives a handover decision auxiliary cell for a certain UE.
  • the source base station may receive the cell from the MME, for example by an initial context setup request message, a handover request message of the S1 interface or a path transfer request acknowledgement message, or it is possible to receive the cell from other base stations, for example via an X2 interface.
  • the handover request message is received.
  • the handover decision auxiliary cell is used to indicate that the member status of the UE in the previous or previous (more than two) handovers and the member status determined by the core network element (such as MME) according to the user subscription information are Consistency is still inconsistent.
  • the cell reflects the UE switching in the previous or previous times
  • the accuracy of the content reported in the process the base station can determine whether the content reported by the UE is trusted by the cell.
  • the handover decision auxiliary cell is maintained and stored at the MME, and the MME may be stored in the UE context or may not be stored in the UE context. After the UE is detached, the MME may not immediately delete the handover decision auxiliary cell of the UE, but may be used for The UE is in the process of switching.
  • the MME may set the value of the handover decision auxiliary cell according to the member status reported by the UE in the history record of the handover, and may determine the value of the auxiliary cell according to the current handover, and one or more times in the near future.
  • the condition that the member status reported by the UE is compared with the member status judged by the MME during the handover process is used to maintain and update the handover decision auxiliary cell.
  • the above-mentioned handover determination auxiliary cell may also be referred to as a trusted indication cell, or a member state consistency cell, etc.
  • the value of the handover decision auxiliary cell may be assumed to be "consistent”.
  • the value (referred to as “consistent") means that the member status reported by the UE in the previous or previous handover process is consistent with the member status judged by the core network element, or the value of "inconsistent" (referred to as “inconsistent”). Indicates that the member status reported by the UE in the previous or previous handover process is inconsistent with the member status determined by the core network element.
  • This step is not limited to being performed at this time, as long as the source base station acquires the cell before making a handover decision.
  • Step 202 The UE sends a measurement report to the source base station (that is, the serving base station of the UE, where the service base station may be a macro base station or a home base station);
  • the source base station that is, the serving base station of the UE, where the service base station may be a macro base station or a home base station
  • the measurement report reported by the UE includes the member status of the candidate target cell that the UE reports.
  • Step 203 When the source base station receives the measurement report and performs the handover decision for the UE, if the target base station is the home base station, determine, according to the member status reported by the UE and the handover decision auxiliary cell of the UE, what kind of handover is initiated (X2 or S1 switch) process;
  • the X2 handover procedure When it is determined that the X2 handover procedure is initiated, it is further determined whether the X2 handover procedure is initiated in the case of the member cell being a hybrid cell, whether it is a membership or a non-membership.
  • the member status is used to indicate whether the UE is a member of the candidate target cell. For example, if it is a candidate target cell member user, the member status cell is a member in the measurement report, and if the candidate target cell is a non-member user, the measurement is performed.
  • the member status cell may not be included in the candidate target cell related information in the obituary.
  • the target cell may be a hybrid cell or a Closed Subscriber Group (CSG) cell, and specifically includes the following two types:
  • the source cell is an open cell, or the source cell is a hybrid/CSG cell and the source and destination CSG IDs are different;
  • the source base station is a macro base station
  • the target cell is a hybrid/CSG cell.
  • the specific determining method is as shown in FIG. 3, including: if the handover determining auxiliary cell value is indicated as "consistent", and the UE reports the local UE as the target cell member, determining to initiate the UE to the target The X2 handover process of the cell;
  • the handover decision auxiliary cell value is indicated as "inconsistent", and the UE reports that the UE is the target cell member, it determines the S1 handover procedure of the initiating UE to the target cell;
  • the target cell When determining that the target cell is a hybrid cell, it can directly determine the originating UE to the target cell.
  • the X2 handover process and then according to the handover determination auxiliary cell value and the member status of the UE, determine the identity to initiate the X2 handover process.
  • the specific determination method is as shown in FIG. 4, including:
  • the handover decision auxiliary cell value is indicated as "consistent”, and the UE reports that the UE is the target cell member, it determines the X2 handover procedure of the initiating UE to the target cell by the membership;
  • the handover decision auxiliary cell value is expressed as "consistent”, and the UE reports the UE non-target cell member, it determines the X2 handover procedure of the initiating UE to the target cell by the non-membership;
  • the handover decision auxiliary cell value is indicated as "inconsistent", and the UE reports the UE non-target cell member, it determines the X2 handover procedure of the initiating UE to the target cell by the non-membership;
  • the handover decision auxiliary cell value is indicated as "inconsistent" and the UE reports that the UE is a target cell member, it may determine that any of the following operations are performed:
  • the source base station may send the member status reported by the UE whose value is "member” and the handover determination auxiliary cell whose value is "inconsistent" to the target home base station through the X2 handover request message, and the target home base station determines the Whether the UE accesses the target cell as a member or a non-member, such as a target
  • the home base station can be determined according to its current load situation. If the current load is high, the UE accesses as a non-member, otherwise it can access as a member.
  • the S1 handover procedure of the initiating UE to the target cell may also be determined.
  • Step 204 The UE switches from the serving cell to the target cell through the S1 or X2 handover procedure based on the decision of the source base station.
  • the MME determines the member status of the UE in the target cell after receiving the path transition request message, and notifies the base station of the target cell to the base station to which the target cell belongs. After receiving the member status indicated by the MME, the target cell updates the member status of the UE and performs related processing. The MME re-confirms the member status of the UE, and sends the member status to the base station to which the target cell belongs, ensuring that the UE can access the target cell with the correct identity.
  • the base station that implements the foregoing method includes a receiving module and a switching module, where: the receiving module is configured to receive a handover decision auxiliary cell for a certain UE;
  • the switching module is configured to: when the handover decision for the UE is performed, if the target base station is a home base station, determine whether to initiate an S1 handover procedure or an X2 handover according to the handover determination auxiliary cell of the UE and the member status reported by the UE. Process.
  • the switching module is further configured to: if it is determined that the X2 handover procedure is initiated, determine whether the X2 handover procedure is initiated in the case of the target cell being a hybrid cell, whether it is a membership or a non-membership.
  • the receiving module is configured to receive a handover decision auxiliary cell for a UE in the following manner: receiving the handover decision auxiliary cell from the MME or from another base station.
  • the receiving module is configured to: receive the handover decision auxiliary cell from the MME by: the initial context setup request message sent by the receiving module by using the MME, or the handover request message or the path transfer request of the S1 interface.
  • the acknowledgement message receives the handover decision assistance cell.
  • the receiving module is configured to receive the handover from other base stations in the following manner: Determining the auxiliary cell: The receiving module receives the handover decision auxiliary cell by using a handover request message of the X2 interface sent by another base station.
  • the handover decision auxiliary cell is used to indicate that the member status reported by the UE in the previous or previous handover process is consistent with or inconsistent with the member status determined by the core network element according to the user subscription information;
  • the handover module is configured to determine whether to initiate the S1 handover procedure or the X2 handover procedure according to the handover decision assisting cell of the UE and the member status reported by the UE, and determine that the target cell is a hybrid cell if the X2 handover procedure is determined to be initiated. Initiate the X2 switching process as a member or as a non-member, including:
  • the target cell is a CSG cell
  • the handover decision auxiliary cell value is consistent, and the member status reported by the UE indicates that the UE is the target cell member, determining the X2 handover procedure of the initiating UE to the target cell; or
  • the target cell is a CSG cell
  • the handover decision auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the UE is the target cell member, determining the S1 handover procedure of initiating the UE to the target cell; or
  • the target cell is a hybrid cell
  • the handover decision auxiliary cell value is consistent, and the member status reported by the UE indicates that the UE is the target cell member, determining the X2 handover procedure of initiating the UE to the target cell by the member identity; or
  • the target cell is a hybrid cell
  • the handover determination auxiliary cell value indicates that the handover is performed, and the member status reported by the UE indicates that the local UE is not the target cell member, determining that the UE initiates the X2 handover procedure of the non-membership to the target cell;
  • the target cell is a hybrid cell
  • the handover determination auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the local UE is not the target cell member, determining that the UE initiates the X2 handover procedure of the non-membership to the target cell;
  • the handover determination auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the local UE is the target cell member, it is determined that the UE initiates the S1 handover procedure to the target cell, or determines that the UE is initiated.
  • the base station further includes a sending module, where the switching module is configured to determine a target The cell is a hybrid cell, and the handover decision auxiliary cell value indicates inconsistency, and the member status reported by the UE indicates that the UE is a target cell member, and the handover decision of the UE is determined after the X2 handover procedure of the initiating UE to the target cell is determined.
  • the auxiliary cell and the member status reported by the UE are sent to the target home base station, so that the target home base station determines whether the UE accesses the target cell as a member or a non-member.
  • This application example describes a process in which a source base station receives a handover decision assistance cell through an initial context establishment procedure and performs handover according to the cell embodiment. As shown in FIG. 6, the following steps are included:
  • Step 601 After the radio resource control (RRC) connection is established, the UE and the serving base station complete the radio resource control (RRC) connection establishment, and send an RRC connection setup complete message to the serving base station to trigger the initial context establishment process.
  • the message carries a Non-Access Stratum (NAS) message received by the UE from the upper layer, and the NAS message may be an attach request message or a service request message or a tracking area update request ( TAU request ) message;
  • NAS Non-Access Stratum
  • the serving base station may be a macro base station or a home base station.
  • Step 602 After receiving the RRC connection setup complete message, the source base station sends an initial user message to the MME to continue the initial context establishment process, where the message carries a NAS Protocol Data Unit (PDU) (may be an attach request or a service). Request or TAU request ) ;
  • PDU NAS Protocol Data Unit
  • Step 603 After receiving the initial user message, the MME sends an initial context setup request message to the source base station, and the MME sends the handover decision auxiliary cell to the source base station by using the message. After receiving the initial context setup request message, the source HeNB receives the initial context setup request message. Performing subsequent operations to complete the initial context establishment process;
  • Step 604 The UE sends a measurement report to the source base station.
  • the measurement report includes member status information of the candidate home base station determined by the UE through a white list stored by the UE.
  • Step 605 The source base station determines, according to the measurement report, the handover target base station, and according to the UE in the measurement report.
  • the member status and the handover decision auxiliary cell in the advertisement determine which handover (X2 or S1 handover) is initiated to the target cell;
  • the target cell is a hybrid cell, it is further determined that the handover is initiated as a member or a non-member.
  • the judging process is as described in Embodiment 1, and details are not described herein again.
  • Step 606 The UE performs an S1 or X2 handover procedure according to the foregoing determination result.
  • the MME receives the path transfer request message sent by the target HeNB, according to the CSG ID, the access mode (access mode, only when the target cell is a hybrid cell), and the user subscription information included in the message.
  • the member status of the UE in the target cell is determined. If the CSG ID is in the user subscription information, the member status is determined to be a member. If the CSG ID is not in the user subscription information, the member status is determined to be a non-member. Then, the MME indicates the member status to the target HeNB, and the target HeNB updates the member status of the UE according to the member status indicated by the MME for subsequent processing, including performing subsequent admission control related operations using the updated member status.
  • This application example describes a flow in which the source base station receives the handover decision assistance cell through the path transfer request acknowledgement message in the X2 handover procedure and performs handover according to the scheme of the embodiment.
  • the UE switches from the base station A to the home base station B through the X2 handover procedure, in which the home base station B receives the handover decision assisting cell of the UE through the path transfer request acknowledgement message, and the UE is from the home base station B.
  • the cell is used to perform handover decision during handover to the home base station C.
  • the base station A may be a macro base station or a home base station. As shown in Figure 7, the following steps are included:
  • Step 701 The UE sends a measurement report to the base station A.
  • Step 702 The base station A performs a handover decision, selects a handover target base station, and determines a handover type. In this embodiment, it is assumed that the X2 handover condition is met, and the base station A initiates an X2 handover procedure.
  • Step 703 The base station A sends an X2 handover request message to the base station B, where the message includes the related information used by the base station B for handover preparation and the context of the UE.
  • Step 704 After the base station B is ready to be switched, send a handover request acknowledgement message to the base station A.
  • the RRC message is used to indicate that the UE performs the handover, that is, the RRC connection reconfiguration message.
  • Step 705 The base station A sends the RRC connection reconfiguration message to the UE through the air interface to instruct the UE to perform the corresponding handover operation.
  • Step 706 If necessary, the base station A sends an SN state transition message to the base station B to transmit the uplink and downlink Packet Data Convergence Protocol (PDCP) sequence number state;
  • Step 707 After the UE successfully accesses the target cell of the base station B, Sending an RRC connection reconfiguration complete message to the base station B;
  • PDCP Packet Data Convergence Protocol
  • Step 708 The base station B sends a path transfer request message to the MME to notify the UE that the cell has been replaced.
  • Step 709 The MME sends a path transfer request acknowledgement message to the base station B for confirmation, and the MME sends the handover decision auxiliary cell to the base station B by using the message, and the base station B performs a subsequent UE context release operation to complete the handover procedure.
  • Step 710 The UE sends a measurement report to the base station B, where the measurement report includes the member status of the candidate home base station determined by the UE through the whitelist stored by the UE.
  • Step 711 The base station B determines the handover target base station according to the measurement report, and determines, according to the member status of the UE in the measurement report and the handover decision auxiliary cell, what kind of handover is initiated to the target cell; if the X2 handover is initiated and the target cell is hybrid The cell must also determine to initiate a handover as a member or non-member.
  • Step 712 The UE performs an S1 or X2 handover procedure according to the foregoing determination result.
  • the MME receives the path transfer request message sent by the home base station C, and determines that the UE is based on the CSG ID, the access mode (only when the target cell is a hybrid cell), and the user subscription information included in the message. If the CSG ID is in the user subscription information, the member status is a member. If the CSG ID is not in the user subscription information, the member status is determined to be a non-member. Then, the MME indicates the member status to the home base station C, and the home base station C updates the member status of the UE according to the member status indicated by the MME for subsequent processing.
  • the source base station receives the handover decision assistance cell through the handover request message during the X2 handover procedure and performs handover according to the scheme of the embodiment.
  • the UE switches from the base station A to the base station B through the X2 handover procedure, in which the base station B receives the handover decision assisting cell of the UE through the X2 handover request message, and switches from the base station B to the home base station in the UE.
  • the cell is used in the C process to perform handover decisions.
  • the base station A may be a macro base station or a home base station; similarly, the base station B may be a macro base station or a home base station. As shown in Figure 8, the following steps are included:
  • Steps 801-802, steps 804-808, and steps 810-812 are substantially the same as application example 2, and the description is not repeated here.
  • Step 803 The base station A sends an X2 handover request message to the base station B, where the message includes the related information used by the base station B for handover preparation and the context of the UE, and the base station A sends the handover determination auxiliary cell to the base station B through the message;
  • Step 809 The MME sends a path transfer request acknowledgement message to the base station B for confirmation.
  • This application example describes a flow in which the source base station receives the handover decision assistance cell through the handover request message in the S1 handover procedure and performs handover according to the scheme of the embodiment.
  • the UE switches from the base station A to the base station B through the S1 handover procedure, in which the base station B receives the handover decision assisting cell of the UE through the S1 handover request message, and switches from the base station B to the home base station in the UE.
  • the cell is used in the C process to perform handover decisions.
  • the base station A may be a macro base station or a home base station; similarly, the base station B may be a macro base station or a home base station. As shown in Figure 9, the following steps are included:
  • Step 901 The UE sends a measurement report to the base station A.
  • Step 902 After receiving the measurement report, the base station A performs the handover decision, selects the handover target base station, and determines the handover type. In this embodiment, it is assumed that the X2 handover condition is not met, the base station A initiates the S1 handover procedure, and the base station A sends a handover request message to the MME. ; Step 903: The MME receives the handover request message and performs corresponding processing, and then sends a handover request message to the base station B, and the MME sends the handover determination auxiliary cell to the base station B through the message;
  • Step 904 The base station B sends a handover request acknowledgement message to the MME.
  • Step 905 The MME sends a handover command message (including an RRC connection reconfiguration message) to the base station A;
  • Step 906 The base station A sends an RRC connection reconfiguration message to the UE, and the UE performs a subsequent handover operation to complete the S1 handover process.
  • Step 907 The UE sends a measurement to the base station B, where the measurement report includes a member status of the candidate home base station determined by the UE through its stored whitelist;
  • Step 908 The base station B determines, according to the measurement report, the handover target base station, and determines whether to initiate X2 or S1 handover to the target cell according to the member status reported by the UE in the measurement report and the handover determination auxiliary cell.
  • the target cell is a hybrid cell, it is also determined to initiate a handover as a member or a non-member.
  • Step 909 The UE performs an S1 or X2 handover procedure according to the foregoing judgment result.
  • the MME receives the path transfer request message sent by the home base station C, and determines that the UE is based on the CSG ID, the access mode (only when the target cell is a hybrid cell), and the user subscription information included in the message. If the CSG ID is in the user subscription information, the member status is a member. If the CSG ID is not in the user subscription information, the member status is determined to be a non-member. Then, the MME indicates the member status to the home base station C, and the home base station C updates the member status of the UE according to the member status indicated by the MME for subsequent processing.
  • the embodiment of the present invention provides a handover method and a base station for handover to a home base station.
  • the core network element is not required to perform access control, and the source base station performs access control, which can effectively simplify the handover process and reduce the handover delay. .

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Description

一种切换到家庭基站的切换方法及基站
技术领域
本发明涉及无线通信技术领域， 具体涉及一种切换到家庭基站的切换方 法及基站。
背景技术
家庭基站是一种小型低功率基站， 主要用于家庭和办公室等小范围室内 场所。家庭基站通过室内的电缆、数字用户线路（ Digital Subscriber Line, DSL ) 或光纤等有线接入设备连接到移动运营商核心网， 为特定用户提供基于无线 移动通信网络的接入业务。 是对现有网络部署的有效补充， 能有效提高室内 语音和高速数据业务覆盖。 具有很多优点， 如低成本、 低功率、 接入简单、 即插即用、 节省回传、 与现有终端兼容， 提高网络覆盖等。
长期演进 （Long Term Evolution, LTE)系统中家庭基站被称为家庭基站 (home eNB, HeNB)„ HeNB所支持的功能与 eNB基本一致， HeNB与演进分 组核心网 （ Evolved Packet Core, EPC )之间的进程和 eNB与 EPC之间基本 一致。 由于 HeNB的布署通常没有经过移动运营商的网络规划， 覆盖范围小 且数量众多。 为了更方便的管理并为了支持更多数量的 HeNB, 在演进通用 陆地无线接入网络 ( Evolved UTRAN, E-UTRAN ) 架构下， 还可能在 HeNB 与 EPC的 S 1连接之间弓 I入一个新的网元家庭基站网关 （Home eNB Gateway , HeNB GW)。 HeNB可通过 HeNB GW作为 S 1代理连接移动管理实体（ Mobility Management Entity, MME ) 。 HeNB之间存在 X2直接接口，可进行负荷均衡， 切换优化， 信息交互等。
由于 HeNB 只为特定用户提供服务， 因此引入了封闭成员组 （Closed Subscriber Group, CSG )概念， 每个 CSG有唯一的标识即 CSG ID。 LTE中 为 HeNB定义了三种不同接入方式的小区： CSG小区——对应封闭 （closed ) 模式 HeNB, 仅注册为 CSG组成员的 UE可以接入； 混合 ( hybrid )小区—— 对应 hybrid模式 HeNB, 任意终端都可接入， 但注册为 CSG组成员的 UE能 以更高优先级的成员身份接入； 开放（ Open )小区——对应 open模式 HeNB, 任意 UE都可接入。 HeNB的接入模式和 CSG ID在空口进行广播。 若该小区 不广播 CSG ID和接入模式， 则为 open小区； 若该小区只广播 CSG ID, 则为 CSG小区； 若该小区广播 CSG ID和值为 "hybrid"的接入模式， 则为 hybrid 小区。 核心网和 UE分别保存用户可以以成员身份接入的 CSG ID列表。
但是目前， UE在连接态切换到 HeNB时，一般情况下需要移动管理实体
( Mobility Management Entity, MME )进行接入控制。 发明内容
本发明要解决的技术问题是提供一种切换到家庭基站的切换方法及基 站， 由源基站进行接入控制。
为解决上述技术问题， 本发明实施例提供了一种切换到家庭基站的切换 方法， 包括：
源基站接收针对用户设备 ( UE ) 的切换判定辅助信元；
所述源基站在进行针对所述 UE的切换判决时， 如果目标基站为家庭基 站，根据目标小区类型和所述 UE的切换判定辅助信元和该 UE上报的成员状 态判断发起 S1切换流程还是 X2切换流程。
可选的， 如果判断发起 X2切换流程， 判断在目标小区为混合（hybrid ) 小区情况下是以成员身份还是以非成员身份发起 X2切换流程。
可选的， 所述源基站接收针对某 UE的切换判定辅助信元的步骤包括： 源基站从移动管理实体（ MME )或从其它基站接收所述切换判定辅助信 元。
可选的， 所述源基站从 MME接收所述切换判定辅助信元的步骤包括： 所述源基站通过 MME发送的初始上下文建立请求消息或 S1接口的切换 请求消息或路径转移请求确认消息接收所述切换判定辅助信元。
可选的，所述源基站从其它基站接收所述切换判定辅助信元的步骤包括： 所述源基站通过其他基站发送的 X2接口的切换请求消息接收所述切换 判定辅助信元。 可选的， 所述切换判定辅助信元用于表示在前一次或前几次切换过程中 该 UE上报的成员状态与核心网网元根据用户签约信息判断的成员状态是一 致还是不一致；
所述根据目标小区类型和所述 UE的切换判定辅助信元和该 UE上报的成 员状态判断发起 S1切换流程还是 Χ2切换流程的步骤包括：
若目标小区为封闭成员组（CSG )小区， 切换判定辅助信元值表示一致， 且 UE上报的成员状态表示本 UE为目标小区成员，则判断发起 UE到目标小 区的 Χ2切换流程； 或者
若目标小区为 CSG小区， 切换判定辅助信元值表示不一致， 且 UE上报 的成员状态表示本 UE为目标小区成员， 则判断发起 UE到目标小区的 S1切 换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示一致， 且 UE上报 的成员状态表示本 UE为目标小区成员，则判断发起 UE以成员身份到目标小 区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示一致， 且 UE上报 的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成员身份到目 标小区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上 报的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成员身份到 目标小区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上 报的成员状态表示本 UE为目标小区成员， 则判断发起 UE到目标小区的 S1 切换流程， 或者判断发起 UE以非成员身份到目标小区的 X2切换流程， 或者 判断发起 UE以成员身份到目标小区的 X2切换流程。
可选的， 若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE为目标小区成员，判断发起 UE以成员身份 到目标小区的 X2切换流程的步骤之后还包括：
所述源基站将所述 UE的切换判定辅助信元以及该 UE上报的成员状态发 送给目标家庭基站， 由目标家庭基站决定该 UE以成员身份还是非成员身份 接入目标小区。
可选的， 如果判断发起 X2切换流程，
在路径转移过程中，所述 MME将该 MME判断的所述 UE在目标小区的 成员状态发送给目标基站。
本发明实施例还提供一种实现将用户设备（ UE )切换到家庭基站的基站， 包括接收模块和切换模块， 其中：
所述接收模块， 设置为接收针对 UE的切换判定辅助信元；
所述切换模块， 设置为在进行针对所述 UE的切换判决时， 如果目标基 站为家庭基站， 根据目标小区类型和所述 UE 的切换判定辅助信元和该 UE 上报的成员状态判断发起 S1切换流程还是 X2切换流程。
可选的， 所述切换模块， 还设置为如果判断发起 X2切换流程， 判断在 目标小区为混合（hybrid ) 小区情况下是以成员身份还是以非成员身份发起 X2切换流程。
可选的， 所述接收模块是设置为釆用以下方式接收针对某 UE的切换判 定辅助信元：
从移动管理实体（MME )或从其它基站接收所述切换判定辅助信元。 可选的， 所述接收模块是设置为釆用以下方式从 MME接收所述切换判 定辅助信元：
所述接收模块通过 MME发送的初始上下文建立请求消息或 S1接口的切 换请求消息或路径转移请求确认消息接收所述切换判定辅助信元。
可选的， 所述接收模块是设置为釆用以下方式从其它基站接收所述切换 判定辅助信元：
所述接收模块通过其他基站发送的 X2接口的切换请求消息接收所述切 换判定辅助信元。
可选的， 所述切换判定辅助信元用于表示在前一次或前几次切换过程中 该 UE上报的成员状态与核心网网元根据用户签约信息判断的成员状态是一 致还是不一致；
所述切换模块是设置为釆用以下方式根据 UE的切换判定辅助信元以及 该 UE上报的成员状态判断发起 S1切换流程还是 X2切换流程：
若目标小区为封闭成员组（CSG )小区， 切换判定辅助信元值表示一致， 且 UE上报的成员状态表示本 UE为目标小区成员，则判断发起 UE到目标小 区的 X2切换流程； 或者
若目标小区为 CSG小区， 切换判定辅助信元值表示不一致， 且 UE上报 的成员状态表示本 UE为目标小区成员， 则判断发起 UE到目标小区的 S1切 换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示一致， 且 UE上报 的成员状态表示本 UE为目标小区成员，则判断发起 UE以成员身份到目标小 区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示一致， 且 UE上报 的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成员身份到目 标小区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上 报的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成员身份到 目标小区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上 报的成员状态表示本 UE为目标小区成员， 则判断发起 UE到目标小区的 S1 切换流程， 或者判断发起 UE以非成员身份到目标小区的 X2切换流程， 或者 判断发起 UE以成员身份到目标小区的 X2切换流程。
可选的， 所述基站还包括发送模块， 其设置为在所述切换模块在确定目 标小区为 hybrid小区、 切换判定辅助信元值表示不一致， 且 UE上报的成员 状态表示本 UE为目标小区成员时， 判断发起 UE以成员身份到目标小区的 X2切换流程后， 将所述 UE的切换判定辅助信元以及该 UE上^艮的成员状态 发送给目标家庭基站， 由目标家庭基站决定该 UE以成员身份还是非成员身 份接入目标小区。 本发明还提供另一种切换到家庭基站的切换方法， 其包括： 源基站在进行针对用户设备（UE )的切换判决时， 如果目标基站为家庭 基站， 根据目标小区类型判断发起 S1切换流程还是 X2切换流程。
可选的， 所述根据目标小区类型判断发起 S1切换流程还是 X2切换流程 的步骤包括：
若目标小区为混合 ( hybrid ) 小区， 则判断发起 UE的 X2切换流程。 可选的， 该方法还包括：
所述源基站接收针对 UE的切换判定辅助信元， 所述切换判定辅助信元 用于表示在前一次或前几次切换过程中该 UE上报的成员状态与核心网网元 根据用户签约信息判断的成员状态是一致还是不一致；
其中， 所述若目标小区为混合（hybrid ) 小区， 则判断发起 UE的 X2切 换流程的步骤包括：
若切换判定辅助信元值表示一致，且 UE上报的成员状态表示本 UE为目 标小区成员， 则判断发起 UE以成员身份到目标小区的 X2切换流程； 或者 若切换判定辅助信元值表示一致，且 UE上报的成员状态表示本 UE不是 目标小区成员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程； 或 者
若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE 不是目标小区成员，则判断发起 UE以非成员身份到目标小区的 X2切换流程； 或者
若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE 为目标小区成员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程， 或者判断发起 UE以成员身份到目标小区的 X2切换流程。
本发明实施例还提供另一种实现将 UE切换到家庭基站的基站， 包括切 换模块， 其中：
所述切换模块， 设置为在进行针对 UE的切换判决时， 如果目标基站为 家庭基站， 根据目标小区类型判断发起 S1切换流程还是 X2切换流程。 可选的， 所述切换模块是设置为： 若目标小区为混合（hybrid )小区， 则 判断发起 UE的 X2切换流程。
可选的， 上述基站还包括接收模块， 其中：
所述接收模块， 设置为接收针对 UE的切换判定辅助信元， 所述切换判 定辅助信元用于表示在前一次或前几次切换过程中该 UE上报的成员状态与 核心网网元根据用户签约信息判断的成员状态是一致还是不一致；
所述切换模块是设置为釆用以下方式实现若目标小区为混合 ( hybrid )小 区， 则判断发起 UE的 X2切换流程：
若切换判定辅助信元值表示一致，且 UE上报的成员状态表示本 UE为目 标小区成员， 则判断发起 UE以成员身份到目标小区的 X2切换流程； 或者 若切换判定辅助信元值表示一致，且 UE上报的成员状态表示本 UE不是 目标小区成员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程； 或 者
若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE 不是目标小区成员，则判断发起 UE以非成员身份到目标小区的 X2切换流程； 或者
若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE 为目标小区成员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程， 或者判断发起 UE以成员身份到目标小区的 X2切换流程。
本发明实施例提供一种切换到 hybrid或 CSG接入方式的家庭基站的切换 方法， 对现有切换方法进行优化， 在切换过程中不需核心网网元做接入控制， 由源基站进行接入控制， 能有效简化切换流程， 降低切换延迟。 附图概述
图 1为本发明实施例的部署有家庭基站的 E-UTRAN网络架构图;
图 2为本发明实施例 1流程示意图； 图 3为本发明实施例 1目标为 CSG小区时切换判定辅助信元使用方法示 意图；
图 4为本发明实施例 1 目标为 hybrid小区时切换判定辅助信元使用方法 示意图；
图 5为本发明实施例中的基站的结构示意图；
图 6为本发明应用示例 1的流程示意图；
图 7为本发明应用示例 2的流程示意图；
图 8为本发明应用示例 3的流程示意图；
图 9为本发明应用示例 4的流程示意图。 本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是， 在 不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互任意组合。
实施例 1
图 1描述了部署有家庭基站的 E-UTRAN网络架构图。 HeNB可通过 HeNB
GW作为 SI代理连接 MME, 若 HeNB通过 HeNB GW作为 SI代理连接到 MME,则 HeNB GW中继 UE相关的 SI信令。 HeNB之间存在 X2直接接口 , 可通过该 X2直接接口进行切换。宏基站与家庭基站之间可存在 X2直接接口， 如图 1中的 eNB 3与 HeNB 1之间的 X2接口。
图 2描述了本实施例方案流程， 包括以下步骤：
步骤 201 : 源基站接收针对某 UE的切换判定辅助信元；
源基站有可能从 MME处接收该信元， 例如通过初始上下文建立请求消 息、 S1接口的切换请求消息或路径转移请求确认消息接收， 也有可能从其它 基站处接收该信元， 例如通过 X2接口的切换请求消息接收。
该切换判定辅助信元用于表示在前一次或前几次（两次以上）切换过程 中该 UE上 ^艮的成员状态与核心网网元（如 MME )根据用户签约信息判断的 成员状态是一致还是不一致。 该信元反映了 UE在前一次或者前几次切换过 程中上报的内容准确度， 基站可通过该信元判断 UE上报的内容是否可信。 切换判定辅助信元在 MME处维护及存储， MME可以存储在 UE上下文 中或者也可以不存储在 UE上下文中， UE去附着后 MME可以不立即删除该 UE的切换判定辅助信元， 而用于 UE下次切换过程中。 MME可以根据切换 的历史记录中 UE上报的成员状态与自身判断的成员状态进行比较来设置切 换判定辅助信元的取值， 并可以根据当前切换判定辅助信元取值， 及近期一 次或多次切换过程中 UE上报的成员状态与 MME判断的成员状态相比较的 情况来维护更新该切换判定辅助信元。
上述切换判定辅助信元也可以称为可信指示信元， 或成员状态一致性信 元等， 为了阐述方便， 在以下实施例中切换判定辅助信元的取值假设可以为 表示 "一致" 的值（简称 "一致" ） 即表示在前一次或前几次切换过程中该 UE上报的成员状态与核心网网元判断的成员状态一致， 或表示 "不一致" 的 值（简称 "不一致" ） 即表示在前一次或前几次切换过程中该 UE上报的成 员状态与核心网网元判断的成员状态不一致。
本步骤不限于在此时执行， 只要源基站在进行切换判决前获取到该信元 即可。
步骤 202: UE发送测量报告给源基站（即该 UE的服务基站， 该服务基 站有可能是宏基站或家庭基站） ；
UE上报的测量报告中包括该 UE在其上报的候选目标小区的成员状态。 步骤 203: 源基站收到测量报告后进行针对该 UE的切换判决时，如果目 标基站为家庭基站，则根据 UE上报的成员状态和该 UE的切换判定辅助信元 判断发起何种切换（ X2或 S1切换 ) 流程；
在判断发起 X2切换流程时， 进一步判断在目标小区为 hybrid小区情况 下是以成员身份还是非成员身份发起 X2切换流程。
成员状态用于指示该 UE是否为候选目标小区的成员， 例如若为候选目 标小区成员用户， 则在测量报告中成员状态信元取值为 member, 若为候选目 标小区非成员用户， 则测量 4艮告中该候选目标小区相关信息中可以没有该成 员状态信元。 目标小区可以是混合 （ hybrid ) 小区或封闭成员组 （ Closed Subscriber Group, CSG ) 小区， 具体包括以下两种：
1 )源小区为 open小区，或源小区为 hybrid/CSG小区且源和目标 CSG ID 不相同；
2 ) 源基站为宏基站， 目标小区为 hybrid/CSG小区。
•在确定目标小区为 CSG小区时， 具体判断方法如图 3所示， 包括： 若切换判定辅助信元值表示为 "一致" ， 且 UE上报本 UE为目标小区成 员， 则判断发起 UE到目标小区的 X2切换流程；
若切换判定辅助信元值表示为 "不一致" ， 且 UE上报本 UE为目标小区 成员， 则判断发起 UE到目标小区的 S1切换流程；
否则均不发起切换。
•在确定目标小区为 hybrid小区时， 可直接判断发起 UE到目标小区的
X2切换流程， 然后再根据切换判定辅助信元值和 UE上^艮的成员状态判断以 何种身份发起 X2切换流程， 具体判断方法如图 4所示， 包括：
若切换判定辅助信元值表示为 "一致" ， 且 UE上报本 UE为目标小区成 员， 则判断发起 UE以成员身份到目标小区的 X2切换流程；
若切换判定辅助信元值表示为 "一致" ， 且 UE上报本 UE非目标小区成 员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程；
若切换判定辅助信元值表示为 "不一致" ， 且 UE上报本 UE非目标小区 成员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程；
若切换判定辅助信元值表示为 "不一致" ， 且 UE上报本 UE为目标小区 成员， 则可判定釆取以下操作中的任一种：
a.判断发起 UE以非成员身份到目标小区的 X2切换流程；
b.判断发起 UE以成员身份到目标小区的 X2切换流程；
此时， 源基站可通过 X2切换请求消息将取值为 "成员" 的 UE上报的成 员状态和取值为 "不一致" 的切换判定辅助信元发送给目标家庭基站， 由目 标家庭基站自行决定该 UE以成员还是非成员身份接入目标小区， 例如目标 家庭基站可根据自身当前负荷情况来决定， 若当前负荷较高， 则该 UE以非 成员身份接入， 否则可以以成员身份接入。
可选的， 在确定目标小区为 hybrid小区时， 若切换判定辅助信元值表示 为 "不一致" ， 且 UE上报本 UE为目标小区成员， 也可以判断发起 UE到目 标小区的 S1切换流程。
步骤 204: UE基于源基站的判决通过 S1或 X2切换流程从服务小区切换 至目标小区。
若釆用 X2切换流程， 则在路径转移过程中， MME收到路径转移请求消 息后判断 UE在目标小区的成员状态，并将其判断的该 UE的成员状态通知目 标小区所属基站。目标小区收到 MME指示的成员状态后更新 UE的成员状态 并进行相关处理。通过 MME再次确认 UE的成员状态，并将该成员状态发送 给目标小区所属基站， 保证 UE能以正确的身份接入该目标小区。
如图 5所示， 实现上述方法的基站包括接收模块和切换模块， 其中： 所述接收模块， 设置为接收针对某 UE的切换判定辅助信元；
所述切换模块， 设置为在进行针对所述 UE的切换判决时， 如果目标基 站为家庭基站，根据所述 UE的切换判定辅助信元以及该 UE上报的成员状态 判断发起 S1切换流程还是 X2切换流程。
可选地， 所述切换模块， 还设置为如果判断发起 X2切换流程， 判断在 目标小区为 hybrid小区情况下是以成员身份还是以非成员身份发起 X2切换 流程。
可选地， 所述接收模块是设置为釆用以下方式接收针对某 UE的切换判 定辅助信元： 从 MME或从其它基站接收所述切换判定辅助信元。
可选地， 所述接收模块是设置为釆用以下方式从 MME接收所述切换判 定辅助信元： 所述接收模块通过 MME发送的初始上下文建立请求消息或 S1 接口的切换请求消息或路径转移请求确认消息接收所述切换判定辅助信元。
可选地， 所述接收模块是设置为釆用以下方式从其它基站接收所述切换 判定辅助信元： 所述接收模块通过其他基站发送的 X2接口的切换请求消息 接收所述切换判定辅助信元。
可选地， 所述切换判定辅助信元用于表示在前一次或前几次切换过程中 该 UE上报的成员状态与核心网网元根据用户签约信息判断的成员状态是一 致还是不一致； 所述切换模块是设置为釆用以下方式根据 UE的切换判定辅 助信元以及该 UE上报的成员状态判断发起 S1切换流程还是 X2切换流程， 以及如果判断发起 X2切换流程， 判断在目标小区为 hybrid小区情况下以成 员身份还是以非成员身份发起 X2切换流程， 包括：
O在确定目标小区为 CSG小区后， 若切换判定辅助信元值表示一致， 且 UE上报的成员状态表示本 UE为目标小区成员， 则判断发起 UE到目标小区 的 X2切换流程； 或者
O在确定目标小区为 CSG小区后， 若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE为目标小区成员，则判断发起 UE到目标小 区的 S1切换流程； 或者
O在确定目标小区为 hybrid小区后， 若切换判定辅助信元值表示一致， 且 UE上报的成员状态表示本 UE为目标小区成员，则判断发起 UE以成员身 份到目标小区的 X2切换流程； 或者
O在确定目标小区为 hybrid小区后， 若切换判定辅助信元值表示一致， 且 UE上报的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成 员身份到目标小区的 X2切换流程； 或者
O在确定目标小区为 hybrid小区后，若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成 员身份到目标小区的 X2切换流程； 或者
O在确定目标小区为 hybrid小区后，若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE为目标小区成员，则判断发起 UE到目标小 区的 S1切换流程， 或者判断发起 UE以非成员身份到目标小区的 X2切换流 程， 或者判断发起 UE以成员身份到目标小区的 X2切换流程。
可选地， 所述基站还包括发送模块， 其设置为所述切换模块在确定目标 小区为 hybrid小区、 切换判定辅助信元值表示不一致， 且 UE上报的成员状 态表示本 UE为目标小区成员， 判断发起 UE以成员身份到目标小区的 X2切 换流程后，将所述 UE的切换判定辅助信元以及该 UE上报的成员状态发送给 目标家庭基站， 以由目标家庭基站决定该 UE 以成员身份还是非成员身份接 入目标小区。
应用示例 1
本应用示例描述的是源基站通过初始上下文建立过程接收切换判定辅助 信元并根据该信元釆用实施例 1方案进行切换的流程， 如图 6所示， 包括以 下步骤：
步骤 601 : 在附着过程或服务请求或跟踪区更新过程中， UE与服务基站 完成无线资源控制 （Radio Resource Control, RRC )连接建立后， 发送 RRC 连接建立完成消息给服务基站以触发初始上下文建立过程，该消息中携带 UE 从上层接收的非接入层（Non-Access Stratum, NAS )消息， 该 NAS消息可能 是附着请求（ attach request )消息或服务请求（ service request )消息或跟踪区 更新请求（TAU request ) 消息；
服务基站有可能是宏基站或家庭基站。
步骤 602: 源基站收到 RRC连接建立完成消息进行相关处理后发送初始 用户消息给 MME继续初始上下文建立过程， 该消息中携带 NAS协议数据单 元 ( Protocol Data Unit, PDU ) (可能是 attach request或 service request或 TAU request ) ；
步骤 603: MME收到初始用户消息后进行相关操作后发送初始上下文建 立请求消息给源基站， MME通过该消息将切换判定辅助信元发送给源基站； 源 HeNB收到初始上下文建立请求消息后， 执行后续操作完成初始上下文建 立过程；
步骤 604: UE发送测量报告给源基站； 该测量报告中包含 UE通过自身 存储的白列表（whitelist )判断的在候选家庭基站的成员状态信息；
步骤 605: 源基站根据测量报告确定切换目标基站， 并根据 UE在测量报 告中上 的成员状态和切换判定辅助信元判断向目标小区发起何种切换（ X2 或 S1切换） ；
如果发起 X2切换且目标小区为 hybrid小区， 还进一步判断以成员或非 成员身份发起切换。
判断过程如实施例 1中所述， 此处不再赘述。
步骤 606: UE根据上述判断结果进行 S1或 X2切换流程。
若判定执行 X2切换，则 MME收到目标 HeNB发送的路径转移请求消息 后， 根据该消息中包含的 CSG ID、 接入模式（access mode, 仅当目标小区为 hybrid小区时存在）及用户签约信息判断 UE在该目标小区下的成员状态，若 该 CSG ID在用户签约信息中则判断成员状态为成员，若该 CSG ID不在用户 签约信息中则判断成员状态为非成员。 然后 MME将该成员状态指示目标 HeNB, 目标 HeNB根据 MME指示的成员状态更新该 UE的成员状态进行后 续处理， 包括使用更新的成员状态进行后续的接纳控制相关操作。
应用示例 2
本应用示例描述的是源基站通过 X2切换过程中路径转移请求确认消息 接收切换判定辅助信元并根据该信元釆用实施例 1方案进行切换的流程。 在 本示例中， UE通过 X2切换流程从基站 A切换到家庭基站 B , 在该切换过程 中家庭基站 B通过路径转移请求确认消息接收到 UE的切换判定辅助信元， 并在 UE从家庭基站 B切换到家庭基站 C过程中利用该信元进行切换判决。 在本实施例中基站 A有可能是宏基站， 也有可能是家庭基站。 如图 7所示， 包括以下步骤：
步骤 701： UE发送测量报告给基站 A;
步骤 702: 基站 A进行切换判决， 选定切换目标基站并确定切换类型； 本实施例中假定满足 X2切换条件， 则基站 A发起 X2切换流程。
步骤 703: 基站 A发送 X2切换请求消息给基站 B, 消息中包含基站 B 用于切换准备的相关信息和 UE的上下文；
步骤 704: 基站 B切换准备完成后， 发送切换请求确认消息给基站 A, 该消息中包含用于指示 UE进行切换的 RRC消息， 即 RRC连接重配置消息； 步骤 705: 基站 A将 RRC连接重配置消息通过空口发送给 UE以指示 UE进行相应切换操作；
步骤 706: 如果需要， 基站 A发送 SN状态转移消息给基站 B以传递上 下行分组数据汇聚层（ Packet Data Convergence Protocol, PDCP )序列号状态； 步骤 707: UE成功接入基站 B的目标小区后， 发送 RRC连接重配置完 成消息给基站 B;
步骤 708:基站 B发送路径转移请求消息给 MME以通知该 UE己经更换 小区；
步骤 709: MME发送路径转移请求确认消息给基站 B进行确认， MME 通过该消息将切换判定辅助信元发送给基站 B, 基站 B进行后续 UE上下文 释放操作完成切换流程；
步骤 710: UE发送测量报告给基站 B, 该测量报告中包含 UE通过自身 存储的 whitelist判断的在候选家庭基站的成员状态；
步骤 711 : 基站 B根据测量报告确定切换目标基站， 并根据 UE在测量 才艮告中上 的成员状态和切换判定辅助信元判断向目标小区发起何种切换； 如果发起 X2切换且目标小区为 hybrid小区， 还须判断以成员或非成员 身份发起切换。
具体判断方法参见实施例 1中描述。
步骤 712: UE根据上述判断结果进行 S1或 X2切换流程。
若判定执行 X2切换， 则 MME收到家庭基站 C发送的路径转移请求消 息后， 根据该消息中包含的 CSG ID, access mode (仅当目标小区为 hybrid小 区时存在）及用户签约信息判断 UE在该目标小区下的成员状态，若该 CSG ID 在用户签约信息中则判断成员状态为成员， 若该 CSG ID不在用户签约信息 中则判断成员状态为非成员。 然后 MME将该成员状态指示家庭基站 C, 家 庭基站 C根据 MME指示的成员状态更新该 UE的成员状态进行后续处理。 应用示例 3
本应用示例描述的是源基站通过 X2切换过程中切换请求消息接收切换 判定辅助信元并根据该信元釆用实施例 1方案进行切换的。 在本示例中， UE 通过 X2切换流程从基站 A切换到基站 B , 在该切换过程中基站 B通过 X2 切换请求消息接收到 UE的切换判定辅助信元， 并在 UE从基站 B切换到家 庭基站 C过程中利用该信元进行切换判决。 在本实施例中基站 A有可能是宏 基站， 也有可能是家庭基站； 同样， 基站 B有可能是宏基站， 也有可能是家 庭基站。 如图 8所示， 包括以下步骤：
步骤 801- 802 , 步骤 804-808 , 步骤 810-812与应用示例 2基本相同， 在 此不重复叙述。
本实施例与应用示例 2的不同在于以下步骤：
步骤 803 : 基站 A发送 X2切换请求消息给基站 B , 消息中包含基站 B 用于切换准备的相关信息和 UE的上下文， 基站 A通过该消息将切换判定辅 助信元发送给基站 B;
步骤 809: MME发送路径转移请求确认消息给基站 B进行确认。
应用示例 4
本应用示例描述的是源基站通过 S1 切换过程中切换请求消息接收切换 判定辅助信元并根据该信元釆用实施例 1方案进行切换的流程。在本示例中， UE通过 S1切换流程从基站 A切换到基站 B ,在该切换过程中基站 B通过 S1 切换请求消息接收到 UE的切换判定辅助信元， 并在 UE从基站 B切换到家 庭基站 C过程中利用该信元进行切换判决。 在本示例中基站 A有可能是宏基 站， 也有可能是家庭基站； 同样， 基站 B有可能是宏基站， 也有可能是家庭 基站。 如图 9所示， 包括以下步骤：
步骤 901 : UE发送测量报告给基站 A;
步骤 902: 基站 A收到测量报告后进行切换判决， 选定切换目标基站并 确定切换类型； 本实施例中假定不满足 X2切换条件， 基站 A发起 S1切换流 程， 基站 A发送切换要求消息给 MME; 步骤 903: MME收到切换要求消息并做相应处理后发送切换请求消息给 基站 B, MME通过该消息将切换判定辅助信元发送给基站 B;
步骤 904： 基站 B发送切换请求确认消息给 MME;
步骤 905: MME发送切换命令消息 （包含 RRC连接重配置消息 )给基 站 A;
步骤 906:基站 A再将 RRC连接重配置消息发送给 UE, UE收到后进行 后续的切换操作以完成该 S1切换流程；
步骤 907: UE发送测量给基站 B, 该测量报告中包含 UE通过自身存储 的 whitelist判断的在候选家庭基站的成员状态；
步骤 908: 基站 B根据测量报告确定切换目标基站， 并根据 UE在测量 报告中上报的成员状态和切换判定辅助信元判断向目标小区发起 X2还是 S1 切换；
如果发起 X2切换且目标小区为 hybrid小区， 还须判断以成员或非成员 身份发起切换。
具体判断方法参见实施例 1中描述。
步骤 909: UE根据上述判断结果进行 S1或 X2切换流程。
若判定执行 X2切换， 则 MME收到家庭基站 C发送的路径转移请求消 息后， 根据该消息中包含的 CSG ID, access mode (仅当目标小区为 hybrid小 区时存在）及用户签约信息判断 UE在该目标小区下的成员状态，若该 CSG ID 在用户签约信息中则判断成员状态为成员， 若该 CSG ID不在用户签约信息 中则判断成员状态为非成员。 然后 MME将该成员状态指示家庭基站 C, 家 庭基站 C根据 MME指示的成员状态更新该 UE的成员状态进行后续处理。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
本发明实施例提供一种切换到家庭基站的切换方法及基站， 在切换过程 中可以不需核心网网元做接入控制， 由源基站进行接入控制， 能有效简化切 换流程， 降低切换延迟。

Claims

权 利 要 求 书
1、 一种切换到家庭基站的切换方法， 其包括：
源基站接收针对用户设备 ( UE ) 的切换判定辅助信元；
所述源基站在进行针对所述 UE的切换判决时， 如果目标基站为家庭基 站，根据目标小区类型和所述 UE的切换判定辅助信元和该 UE上报的成员状 态判断发起 S1切换流程还是 X2切换流程。
2、 如权利要求 1所述的方法， 其还包括：
如果判断发起 X2切换流程， 判断在目标小区为混合（hybrid ) 小区情况 下是以成员身份还是以非成员身份发起 X2切换流程。
3、 如权利要求 1或 2所述的方法， 其中：
所述源基站接收针对某 UE的切换判定辅助信元的步骤包括：
源基站从移动管理实体（MME )或从其它基站接收所述切换判定辅助信 元。
4、 如权利要求 3所述的方法， 其中，
所述源基站从 MME接收所述切换判定辅助信元的步骤包括：
所述源基站通过 MME发送的初始上下文建立请求消息或 S1接口的切换 请求消息或路径转移请求确认消息接收所述切换判定辅助信元。
5、 如权利要求 3所述的方法， 其中，
所述源基站从其它基站接收所述切换判定辅助信元的步骤包括： 所述源基站通过其他基站发送的 X2接口的切换请求消息接收所述切换 判定辅助信元。
6、 如权利要求 1所述的方法， 其中：
所述切换判定辅助信元用于表示在前一次或前几次切换过程中该 UE上 报的成员状态与核心网网元根据用户签约信息判断的成员状态是一致还是不 一致；
所述根据目标小区类型和所述 UE的切换判定辅助信元和该 UE上报的成 员状态判断发起 SI切换流程还是 X2切换流程的步骤包括：
若目标小区为封闭成员组（CSG )小区， 切换判定辅助信元值表示一致， 且 UE上报的成员状态表示本 UE为目标小区成员，则判断发起 UE到目标小 区的 X2切换流程； 或者
若目标小区为 CSG小区， 切换判定辅助信元值表示不一致， 且 UE上报 的成员状态表示本 UE为目标小区成员， 则判断发起 UE到目标小区的 S1切 换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示一致， 且 UE上报 的成员状态表示本 UE为目标小区成员，则判断发起 UE以成员身份到目标小 区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示一致， 且 UE上报 的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成员身份到目 标小区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上 报的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成员身份到 目标小区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上 报的成员状态表示本 UE为目标小区成员， 则判断发起 UE到目标小区的 S1 切换流程， 或者判断发起 UE以非成员身份到目标小区的 X2切换流程， 或者 判断发起 UE以成员身份到目标小区的 X2切换流程。
7、 如权利要求 6所述的方法， 其中：
若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上 报的成员状态表示本 UE为目标小区成员，判断发起 UE以成员身份到目标小 区的 X2切换流程的步骤之后还包括：
所述源基站将所述 UE的切换判定辅助信元以及该 UE上报的成员状态发 送给目标家庭基站， 由目标家庭基站决定该 UE以成员身份还是非成员身份 接入目标小区。
8、 如权利要求 6所述的方法， 其还包括： 如果判断发起 X2切换流程，
在路径转移过程中，所述 MME将该 MME判断的所述 UE在目标小区的 成员状态发送给目标基站。
9、 一种实现将用户设备（UE )切换到家庭基站的基站， 包括接收模块 和切换模块， 其中：
所述接收模块， 设置为接收针对 UE的切换判定辅助信元；
所述切换模块， 设置为在进行针对所述 UE的切换判决时， 如果目标基 站为家庭基站， 根据目标小区类型和所述 UE 的切换判定辅助信元和该 UE 上报的成员状态判断发起 S1切换流程还是 X2切换流程。
10、 如权利要求 9所述的基站， 其中：
所述切换模块， 还设置为如果判断发起 X2切换流程， 判断在目标小区 为混合 ( hybrid )小区情况下是以成员身份还是以非成员身份发起 X2切换流 程。
11、 如权利要求 9或 10所述的基站， 其中：
所述接收模块是设置为釆用以下方式接收针对某 UE的切换判定辅助信 元：
从移动管理实体（MME )或从其它基站接收所述切换判定辅助信元。
12、 如权利要求 11所述的基站， 其中：
所述接收模块是设置为釆用以下方式从 MME接收所述切换判定辅助信 元：
所述接收模块通过 MME发送的初始上下文建立请求消息或 S1接口的切 换请求消息或路径转移请求确认消息接收所述切换判定辅助信元。
13、 如权利要求 11所述的基站， 其中：
所述接收模块是设置为釆用以下方式从其它基站接收所述切换判定辅助 信元：
所述接收模块通过其他基站发送的 X2接口的切换请求消息接收所述切 换判定辅助信元。
14、 如权利要求 9所述的基站， 其中：
所述切换判定辅助信元用于表示在前一次或前几次切换过程中该 UE上 报的成员状态与核心网网元根据用户签约信息判断的成员状态是一致还是不 一致；
所述切换模块是设置为釆用以下方式根据 UE的切换判定辅助信元以及 该 UE上报的成员状态判断发起 S1切换流程还是 X2切换流程：
若目标小区为封闭成员组（CSG )小区， 切换判定辅助信元值表示一致， 且 UE上报的成员状态表示本 UE为目标小区成员，则判断发起 UE到目标小 区的 X2切换流程； 或者
若目标小区为 CSG小区， 切换判定辅助信元值表示不一致， 且 UE上报 的成员状态表示本 UE为目标小区成员， 则判断发起 UE到目标小区的 S1切 换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示一致， 且 UE上报 的成员状态表示本 UE为目标小区成员，则判断发起 UE以成员身份到目标小 区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示一致， 且 UE上报 的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成员身份到目 标小区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上 报的成员状态表示本 UE不是目标小区成员，则判断发起 UE以非成员身份到 目标小区的 X2切换流程； 或者
若目标小区为 hybrid小区， 切换判定辅助信元值表示不一致， 且 UE上 报的成员状态表示本 UE为目标小区成员， 则判断发起 UE到目标小区的 S1 切换流程， 或者判断发起 UE以非成员身份到目标小区的 X2切换流程， 或者 判断发起 UE以成员身份到目标小区的 X2切换流程。
15、 如权利要求 14所述的基站， 其中：
所述基站还包括发送模块， 其设置为在所述切换模块在确定目标小区为 hybrid小区、切换判定辅助信元值表示不一致，且 UE上报的成员状态表示本 UE为目标小区成员时， 判断发起 UE以成员身份到目标小区的 X2切换流程 后，将所述 UE的切换判定辅助信元以及该 UE上报的成员状态发送给目标家 庭基站， 由目标家庭基站决定该 UE以成员身份还是非成员身份接入目标小 区。
16、 一种切换到家庭基站的切换方法， 其包括：
源基站在进行针对用户设备（UE )的切换判决时， 如果目标基站为家庭 基站， 根据目标小区类型判断发起 S1切换流程还是 X2切换流程。
17、 如权利要求 16所述的方法， 其中， 所述根据目标小区类型判断发起 S1切换流程还是 X2切换流程的步骤包括：
若目标小区为混合 ( hybrid ) 小区， 则判断发起 UE的 X2切换流程。
18、 如权利要求 17所述的方法， 该方法还包括：
所述源基站接收针对 UE的切换判定辅助信元， 所述切换判定辅助信元 用于表示在前一次或前几次切换过程中该 UE上报的成员状态与核心网网元 根据用户签约信息判断的成员状态是一致还是不一致；
其中， 所述若目标小区为混合（hybrid ) 小区， 则判断发起 UE的 X2切 换流程的步骤包括：
若切换判定辅助信元值表示一致，且 UE上报的成员状态表示本 UE为目 标小区成员， 则判断发起 UE以成员身份到目标小区的 X2切换流程； 或者 若切换判定辅助信元值表示一致，且 UE上报的成员状态表示本 UE不是 目标小区成员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程； 或 者
若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE 不是目标小区成员，则判断发起 UE以非成员身份到目标小区的 X2切换流程； 或者
若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE 为目标小区成员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程， 或者判断发起 UE以成员身份到目标小区的 X2切换流程。
19、一种实现将用户设备（UE )切换到家庭基站的基站， 包括切换模块， 其中：
所述切换模块， 设置为在进行针对 UE的切换判决时， 如果目标基站为 家庭基站， 根据目标小区类型判断发起 S1切换流程还是 X2切换流程。
20、 如权利要求 19所述的基站， 其中：
所述切换模块是设置为： 若目标小区为混合 ( hybrid )小区， 则判断发起
UE的 X2切换流程。
21、 如权利要求 20所述的基站， 其还包括接收模块， 其中：
所述接收模块， 设置为接收针对 UE的切换判定辅助信元， 所述切换判 定辅助信元用于表示在前一次或前几次切换过程中该 UE上报的成员状态与 核心网网元根据用户签约信息判断的成员状态是一致还是不一致；
所述切换模块是设置为釆用以下方式实现若目标小区为混合 ( hybrid )小 区， 则判断发起 UE的 X2切换流程：
若切换判定辅助信元值表示一致，且 UE上报的成员状态表示本 UE为目 标小区成员， 则判断发起 UE以成员身份到目标小区的 X2切换流程； 或者 若切换判定辅助信元值表示一致，且 UE上报的成员状态表示本 UE不是 目标小区成员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程； 或 者
若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE 不是目标小区成员，则判断发起 UE以非成员身份到目标小区的 X2切换流程； 或者
若切换判定辅助信元值表示不一致， 且 UE上报的成员状态表示本 UE 为目标小区成员， 则判断发起 UE以非成员身份到目标小区的 X2切换流程， 或者判断发起 UE以成员身份到目标小区的 X2切换流程。
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