WO2012152118A1 - 成员状态辅助信息更新方法及装置、基站切换方法及装置 - Google Patents

成员状态辅助信息更新方法及装置、基站切换方法及装置 Download PDF

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Publication number
WO2012152118A1
WO2012152118A1 PCT/CN2012/072341 CN2012072341W WO2012152118A1 WO 2012152118 A1 WO2012152118 A1 WO 2012152118A1 CN 2012072341 W CN2012072341 W CN 2012072341W WO 2012152118 A1 WO2012152118 A1 WO 2012152118A1
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WIPO (PCT)
Prior art keywords
base station
member status
information
mme
cell
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PCT/CN2012/072341
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English (en)
French (fr)
Inventor
谢峰
黄莹
奚进
祝建建
翟恒星
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012152118A1 publication Critical patent/WO2012152118A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • a base station is a device that provides wireless access for a user equipment (User Equipment, UE), and one base station may include one or more serving cells.
  • the cell may have different access modes (Access Mode): Generally, an ordinary cell can provide access services for any user, such a cell is called an open cell, and needs to be restricted for access in an application environment such as a home or an enterprise.
  • a Closed Subscriber Group (CSG) cell or a closed (Closed) cell can only allow specified users (ie members) to access; or a hybrid (Hybrid) cell is given priority While providing access to member users, it also provides access services for non-member users.
  • a closed cell or a hybrid cell is a typical feature of a home base station, although in some cases other types of base stations (e.g., macro base stations) may also be configured with closed or hybrid cells.
  • base stations e.g., macro base stations
  • LTE Long Term Evolution
  • MME Mobility Management Entity
  • a closed cell needs to perform access control on the accessed users (ie, restrict users who are allowed to access), and the hybrid cell needs to perform member verification (ie, distinguishing members and non-members) from the accessed users, in the existing In the LTE technology, the function of access control or membership authentication is implemented by the MME. Therefore, when a user switches from a neighboring cell to a closed cell or a hybrid cell, it is often necessary to initiate an S1 handover from the source base station, which results in a comparison. Great delay and overhead.
  • the membership status of the UE may also be changed due to the change of the cell.
  • the UE is a member of the cell, but the UE is not a member of the target cell.
  • Reporting it as a member causes the UE's member status information to be inconsistent.
  • the MME currently uses the member status assistance information to authenticate the member status of the UE.
  • the member status assistance information saved by the MME cannot be changed according to the behavior and status of the UE at any time, which causes the subsequent MME to be in the process of handover.
  • Unable to confirm whether the UE can meet the handover condition it may happen that the UE meets the handover condition but cannot Switching to the cell to be switched (ie, the target cell), the UE cannot access the service or service it is applying for, or the UE does not satisfy the handover condition but switches it to the target cell to provide services or services.
  • the member status assistance information saved by the MME in the related art cannot be changed according to the behavior and status of the UE at any time.
  • a main object of the embodiments of the present invention is to provide a method and apparatus for updating member status assistance information, and a method and apparatus for switching base station, so as to solve at least the member status assistance information saved by the MME, and cannot be based on the behavior and status of the UE at any time. Change the issue.
  • a method for updating member status assistance information including: a mobility management entity (MME) determines a member status of a user equipment (UE) according to a closed user group identifier of a cell, where the cell is a The cell to be switched by the UE or the cell accessed by the UE; the MME updates the saved member status auxiliary information corresponding to the UE according to the determination result.
  • the method includes: the MME receiving the member status information of the UE; and the MME updating and saving the corresponding information corresponding to the UE according to the determination result.
  • the member status assistance information includes: the MME updating the member status assistance information according to the member status information and the determination result.
  • the MME updates the member status assistance information according to the member status information and the determination result, including: when the member status information is inconsistent with the determination result, the MME sends the member status auxiliary information.
  • the member status information is inconsistent with the determination result, and includes at least one of the following: the member status information is a member, but the determination result is a non-member; the member status information is a non-member, but the The judgment result is a member.
  • the MME updates the member status assistance information according to the member status information and the determination result, including: when the member status information is consistent with the determination result, the MME sends the member status auxiliary information.
  • the MME receiving the member status information of the UE the method includes: the MME receiving the member status information sent by the base station, where the member status information is carried in any one of the following messages sent by the base station : Path conversion request message, handover required message, initial UE message.
  • the method further includes: sending, by the MME, the updated member status auxiliary information to the sending the member by using any one of the following messages:
  • the MME further includes: the base station that sends the member status information or the target base station according to the Receiving the member status assistance information, updating the base station that sends the member status information or member status assistance information corresponding to the UE saved by the target base station; or the base station or the target that sends the member status information
  • the base station stores member status assistance information corresponding to the UE.
  • the method further includes: sending, by the MME, member status information of the UE to the sending station by using any one of the following messages: The base station or the target base station that describes the member status information: a path switch request acknowledgement message, a handover request message, a path switch request failure message, and a handover preparation failure message, an initial context setup request message.
  • the base station or the target base station that describes the member status information: a path switch request acknowledgement message, a handover request message, a path switch request failure message, and a handover preparation failure message, an initial context setup request message.
  • the MME further includes: the base station that sends the member status information or the target The base station updates the base station that sends the member status information or the member status assistance information corresponding to the UE that is saved by the target base station according to the received member status information.
  • the base station or the target base station that sends the member status information updates the base station that sends the member status information or the member status that is saved by the target base station and is related to the UE according to the received member status information.
  • the auxiliary information includes: if the received member status information indicates that the UE is a non-member, the source base station or the target base station sets the member status auxiliary information to a predetermined value of one.
  • the base station of the base station or the target base station that sends the member status information includes: a home base station and a macro base station.
  • the method before the MME determines the member status of the UE according to the closed user group identifier of the cell, the method includes: the MME receiving the access mode information of the cell; and the MME updating and saving according to the determination result.
  • the member status assistance information corresponding to the UE includes: the MME updating the member status assistance information according to the access mode information and the determination result.
  • the MME updates the member status assistance information according to the access mode information and the determination result, including: the access mode corresponding to the access mode information is closed, and the determination result is non-
  • the MME sets the member status assistance information to a predetermined value of one.
  • the MME updates the member status assistance information according to the access mode information and the determination result, including: the access mode corresponding to the access mode information is a closed type, and the determination result is a member.
  • the MME sets the member status assistance information to a predetermined value two.
  • a base station handover method including: receiving, by a base station, updated member state assistance information of a mobility management entity (MME), where the member state assistance information is closed by the MME according to a cell
  • MME mobility management entity
  • the user group identifier determines that the judgment result of the member state of the user equipment (UE) is updated; and the base station performs the handover decision according to the updated member state assistance information.
  • the base station performs a handover decision according to the updated member state assistance information, including: when the member state assistance information is a predetermined value, the base station and the base station to be switched adopt an S1 switch; When the auxiliary information is a predetermined value two, the base station and the base station to be switched adopt X2 handover.
  • the base station includes: a home base station and a macro base station.
  • another base station handover method is provided, including: receiving, by a base station, member status information of a user equipment (UE) sent by a mobility management entity (MME); the base station updating a member according to the member status information Status assistance information, and the handover decision is performed based on the updated member status assistance information.
  • an apparatus for updating member status assistance information is provided, which is disposed in a mobility management entity (MME), and includes: a determining module, configured to determine a user equipment (UE) according to a closed subscriber group identifier of a cell.
  • a base station switching apparatus which is disposed in a base station, and includes: a first receiving module, configured to receive updated member state assistance information of a mobility management entity (MME); The module is configured to perform a handover decision according to the updated member state assistance information.
  • MME mobility management entity
  • another base station switching apparatus which is disposed in a base station, and includes: a second receiving module, configured to receive a user equipment (UE) sent by a mobility management entity (MME) Member status information; a second execution module, configured to update the member status assistance information according to the member status information, and perform a handover decision according to the updated member status assistance information.
  • the MME determines the member status of the UE according to the closed user group identifier of the cell, and updates the saved member status auxiliary information corresponding to the UE according to the determination result.
  • FIG. 1 is an E-UTRAN system architecture in which a home base station is deployed according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a process of updating a member state assistance information according to an embodiment of the present invention
  • FIG. 4 is a flowchart of processing of updating member status assistance information according to Embodiment 1 of the present invention
  • FIG. 5 is an update of Embodiment 1 according to an embodiment of the present invention
  • FIG. 6 is a detailed flowchart 2 of updating member status auxiliary information according to Embodiment 1 of the present invention
  • FIG. 7 is a second embodiment of the present invention according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a process of updating member state auxiliary information in an S1 switching process according to Embodiment 3 of the embodiment of the present invention
  • FIG. 9 is a flowchart according to an embodiment of the present invention.
  • FIG. 10 is an access method according to Embodiment 5 of the embodiment of the present invention; Member state update process flowchart of assistance information processing;
  • FIG. 11 is a schematic structural diagram of an auxiliary information updating apparatus in accordance with an embodiment of the member state of the present invention;
  • FIG. 12 is a first schematic structural diagram of a base station switching apparatus according to an embodiment of the present invention;
  • FIG. 13 is a second schematic structural diagram of a base station switching apparatus according to an embodiment of the present invention.
  • 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 deployment 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 e B
  • the functions supported by He B are similar to those of the enhanced NodeB (e B).
  • the process between the HeNB and the Evolved Packet Core (EPC) is similar to that between the eNB and the EPC. Since the deployment of the HeNB usually does not go through the network planning of the mobile operator, the coverage of the HeNB is usually small and numerous. In order to more conveniently manage and support a larger number of HeNBs, under the Evolved Universal Mobile Telecommunications System Territorial Radio Access Network (E-UTRAN) architecture, it may also be in HeNB and EPC.
  • E-UTRAN Evolved Universal Mobile Telecommunications System Territorial Radio Access Network
  • the HeNB can connect to the MME through the HeNB GW as an SI proxy.
  • the E-UTRAN architecture is shown in Figure 1. Since the HeNB only provides services for specific users, the concept of Closed Subscriber Group (CSG) is introduced, and each CSG has a unique identifier, that is, a CSG ID.
  • CSG Closed Subscriber Group
  • a closed type (CSG) cell (a UE that is only registered as a CSG member can access), a hybrid (hybrid) cell (an ordinary terminal can access, but is registered as The UE of the CSG member can access with a higher priority membership, an open (any UE can access).
  • the access mode and CSG ID of the HeNB can be broadcast on the air interface. If the cell does not broadcast the CSG ID and the access mode, it is an Open cell; if the cell only broadcasts the CSG ID (not the broadcast access mode), it is a CSG cell; if the cell broadcasts the CSG ID and the value is "hybrid"
  • the access mode is a hybrid cell.
  • the core network and the UE respectively save a list of CSG IDs that the user can access as a member.
  • Switching the UE to the closed or hybrid He B in the connected state can be done through the S1 or X2 switching procedure.
  • the S1 switching process can only be used in general.
  • the X2 handover process does not require core network participation, and the handover process is more concise and efficient.
  • the existing standard protocol only a small number of MMEs are not required to perform access control/member verification, and the basic conditions of X2 handover are met (the X2 interface between the source base station and the destination base station is connected, and both are connected in the same MME pool (MME).
  • the X2 handover procedure can be adopted, that is, two CSG/hybrid inter-cell handovers having the same CSG ID, or the X2 handover procedure can be adopted when the target cell is an Open cell.
  • the source base station needs to perform handover decision according to the UE's measurement report on the neighboring cell, including selecting the target cell.
  • the neighboring cell is a closed or hybrid cell
  • the common procedure requires the UE to report the closed subscriber group identifier (CSG ID) of the closed cell or the hybrid cell and the member status of the UE. Therefore, an improved method is provided.
  • the switch state is performed by using the member status reported by the UE and the member status assistance information, where the member status assistance information indicates the credibility, reliability, accuracy, or the status of the member reported by the UE and the status of the member reported by the MME. Consistency of the member status, or indicating whether the UE is a normal UE or an abnormal UE (the member status reported by the abnormal UE is problematic). In this way, different handover policies can be adopted for different UEs. For example, when the member status assistance information indicates that the consistency between the member status reported by the UE and the member status of the mobile management entity is true, the base station can report the UE. The member state is optimized for the switching decision.
  • the member status assistance information can be saved on the MME and the service as part of the UE context information. At the base station, other information can also be stored on the MME and on the serving base station.
  • the UE starts to appear that the reported member status is not true, how to update the member status assistance information in time, so that the base station does not completely rely on the member status information reported by the UE to perform the handover decision, but falls back to the traditional The handover decision and execution flow avoids the situation where the UE behavior is out of sync with the member status assistance information.
  • an embodiment of the present invention provides a method for updating member status assistance information, and timely reflects the credibility or accuracy of a member status reported by the UE, so that the handover decision and the execution flow follow the change of the UE behavior.
  • the processing flow is as shown in FIG. 2, and includes steps S202 to S204: Step S202: The MME determines the member status of the UE according to the closed user group identifier of the cell; wherein, the cell is the UE to be switched. The cell or the cell that the UE accesses; Step S204: The MME updates the saved member state auxiliary information corresponding to the UE according to the determination result.
  • the MME determines the member status of the UE according to the closed user group identifier of the cell, and updates the saved member status auxiliary information corresponding to the UE according to the determination result.
  • the MME updates the member status assistance information according to the judgment result, and does not completely depend on the member status information reported by the UE, thereby avoiding the situation that the UE behavior and the member status auxiliary information are not synchronized. .
  • the MME receives the member status information of the UE before determining the member status of the UE according to the closed user group identifier of the target cell, and then the MME updates the member status assistance information according to the member status information and the determination result. Specifically, if the member status information is inconsistent with the determination result, the MME sets the member status assistance information to a predetermined value of one.
  • the member status information is inconsistent with the judgment result, including: member status information is a member, but the judgment result is a non-member; or, the member status information is a non-member, but the judgment result is a member.
  • the MME sets the member status assistance information to a predetermined value two.
  • the predetermined value one and the predetermined value two are a specified value of the member state auxiliary information, and can indicate different member states, for example, the UE is normal, abnormal, valid, invalid, trusted, untrustworthy, member judgment consistent, member Inconsistent, malicious, and so on.
  • a predetermined value of one is selected, which indicates that the UE is not trusted or malicious, and the member status information is consistent with the judgment result, and a predetermined value of two is selected, which indicates that the UE is trusted or valid. , and many more.
  • the specific member status depends on the actual situation. As mentioned above, the MME receives the member status information.
  • the member status information is sent by the base station to the MME, where the member status information is carried in any of the following messages sent by the base station: path conversion request message, handover required message, initial UE message.
  • the member status information may also be carried in messages sent by other base stations to the MME, as the case may be.
  • the MME further includes: sending, by the MME, the updated member status assistance information to the base station of the sending member status information or the target of the UE by using any one of the following messages: Base station: a path switch request acknowledgement message, a handover request message, a path switch request failure message, and a handover preparation failure message, an initial context setup request message.
  • Base station a path switch request acknowledgement message, a handover request message, a path switch request failure message, and a handover preparation failure message, an initial context setup request message.
  • the status assistance information indicates that the member status is a non-member, and the corresponding base station sets the member status assistance information to a predetermined value of one.
  • the base station that sends the member status information or the target base station of the UE may have a situation in which the member status auxiliary information is not originally saved. In this case, the base station directly saves the received member status auxiliary information, and does not need to Update existing information.
  • the member status information may also be sent to the base station, and the message carrying the member status information may be any one of the following: path conversion A request confirmation message, a handover request message, a path conversion request failure message, and a handover preparation failure message, an initial context establishment request message.
  • the member status information may also be carried in the message sent by the MME to the base station, as the case may be.
  • the corresponding base station may update the member status auxiliary information that is saved by the UE according to the received member status information. For example, if the received member status information indicates that the UE is a non-member, the corresponding base station sets the member status assistance information to a predetermined value of one.
  • the base station type of the base station or the target base station that transmits the member status information includes: a home base station and a macro base station. That is, the preferred types of base stations mentioned in the above various embodiments of the present invention may include a home base station and a macro base station.
  • the embodiment of the present invention provides another preferred embodiment.
  • the MME receives the target cell access mode information of the target cell, and the MME The member status assistance information is updated according to the target cell access mode information and the judgment result.
  • the MME sets the member state assistance information to a predetermined value of one. If the target cell access mode corresponding to the target cell access mode information is closed, and the judgment result is a member, the MME sets the member state auxiliary information to a predetermined value two.
  • an embodiment of the present invention provides a base station handover method, and the processing flow thereof is as shown in FIG. 3, and includes steps S302 to S304:
  • Step S302 The base station receives the member status auxiliary information after the MME is updated;
  • the status assistance information is updated by the MME according to the closed user group identifier of the cell to determine the member status of the UE.
  • Step S304 The base station performs a handover decision according to the updated member status assistance information.
  • the base station and the base station to be switched adopt S1 handover; when the member status auxiliary information is the predetermined value two, the X2 handover is adopted between the base stations and the base station to be switched.
  • the base station involved in the embodiment of the present invention includes a home base station and a macro base station. Based on the same inventive concept, the embodiment of the present invention further provides another base station handover method, where the specific steps are as follows: The base station receives the member status information of the UE sent by the MME; the base station updates the member status auxiliary information according to the member status information, and according to the updated The member status assistance information performs a handover decision.
  • FIG. 4 is a flowchart of updating member status assistance information in a handover procedure. As shown in FIG. 4, the embodiment includes the following steps (step S402 to step S404): Step S402: The mobility management entity according to the closed subscriber group identifier Determining the member status; Step S404, the mobility management entity updates the member status assistance information. 5 is a detailed flowchart 1 of updating the member status assistance information. As shown in FIG.
  • the refinement process includes the following steps (step S502 to step S506): Step S502: The mobility management entity receives the member status information; Step S504, The mobility management entity determines the member status according to the closed user group identifier. Step S506: The mobility management entity updates the member status assistance information according to the received member status information and the member status determined by itself. 6 is a detailed flowchart 2 of updating the member status assistance information; as shown in FIG. 6, the refinement process includes the following steps (step S602 to step S606): Step S602: The mobility management entity receives the target cell access mode information. Step S604: The mobility management entity determines the member status according to the closed user group identifier.
  • Step S606 The mobility management entity updates the member status assistance information according to the target cell access mode information and the member status determined by itself.
  • FIG. 7 is a detailed flowchart of updating member status assistance information in the X2 handover procedure. As shown in FIG. 7, the embodiment includes the following steps (step S702 to step S716): Step S702: The UE reports measurement to the source base station.
  • Step S704 The source base station sends a handover request message to the target base station; Step S706, the target base station, the source base station, and the UE perform subsequent handover preparation and Step S708: The target base station sends a path switch request message to the MME, where the CSG ID is included.
  • Step S710 The MME determines the member status.
  • Step S712 The MME (when needed) updates the member status support information.
  • the UE can report its measurement result to the neighboring cell to the serving base station. If the measured neighbor cell broadcasts a CSG ID (meaning the cell is a CSG cell or a hybrid cell), the UE includes in the measurement result.
  • a CSG ID meaning the cell is a CSG cell or a hybrid cell
  • the UE If the neighboring cell broadcasts an access mode (meaning that the cell is a hybrid cell), the UE according to
  • the CSG ID and the CSG white table maintained by itself determines the member status.
  • the UE includes the member status of the UE in the measurement report (indication) As a "member"), when it is judged that it is not a member, the member status of the UE is not included in the measurement report.
  • the UE In the case that the neighboring cell is a CSG cell, the UE only reports the cell that is determined to be a member.
  • the UE does not carry the member status in the measurement result, and the base station defaults the UE as a member of the reported CSG cell (the UE can be considered as This member status is implied in the measurement report).
  • the measurement result may also include a global cell identifier of the neighboring cell.
  • CGI Cell Global Identity
  • the serving base station receives the measurement report of the UE, and performs handover decision according to the information carried in the measurement report and some information of the base station. Some information of the base station may include membership status information of the UE, load of the neighboring base station, handover policy information from the core network, and the like. If the base station determines to initiate a handover to the target cell by using the X2 handover, the base station sends a handover request (Handover Request) message to the target base station, and the message is sent through the X2 interface, and is also called For the X2 Handover Request message.
  • Handover Request handover request
  • the message carries the CSG member status (indicated as a member or a non-member) in addition to the information such as the identity of the target cell.
  • the target base station After receiving the X2 handover request message, the target base station completes the handover preparation and handover execution process with the source base station and the UE.
  • the UE has accessed the target base station, and then the target base station sends a Path Switch Request message to the MME to transfer the base station end of the downlink user plane path from the source base station to the target base station (meaning The downlink data from the S-GW is no longer sent to the source base station, but to the target base station).
  • the path switching request message includes the global cell identifier of the UE accessing the cell, and the UE accessing the cell is mostly the target cell selected by the source base station.
  • the path switching request message includes the CSG ID of the UE accessing the cell. Since only the member UE can access the CSG cell, the target cell is not required to be carried in the path switching request message.
  • the target cell is a hybrid cell
  • the path switching request message includes the CSG ID of the UE accessing the cell, the access mode of the cell (indicated as hybrid), and the member status information (indicated as a member or a non-member).
  • the information should be derived from the X2 handover request message sent by the source base station, that is, indirectly from the measurement report of the UE at the previous base station.
  • the MME determines whether the UE is a member of the CSG according to the CSG ID (this process may be referred to as access control for a closed cell, and may be referred to as membership verification for a hybrid cell).
  • the cell access mode is hybrid, if the MME receives the member status information indicating that the UE is a non-member, the member status information is set to indicate that the UE is not trusted, or the UE is malicious (abnormal).
  • the UE, or the UE and the MME are inconsistent (corresponding to the predetermined value two), so if the member status assistance information originally indicates that the UE is trusted, normal, or the member determines the agreement (corresponding to the predetermined value one), the MME updates the member status assistance information.
  • the member status assistance information may be stored on the MME and the serving base station as part of the UE context information, or may be stored as other information on the MME and on the serving base station. If it is judged that the UE is a member and the member status assistance information is indicated as a non-member, this may not occur, and the behavior of the MME may be determined according to other considerations. If the MME determines that the member of the UE is consistent with the received member status information (that is, both are indicated as members or both are indicated as non-members), the member status assistance information may be set to indicate that the UE is trusted, normal, or the member is consistent.
  • the MME updates the member status assistance information.
  • the cell access mode is a CSG cell
  • the UE accessing the cell means that the UE indicates that the UE is a member of the CSG ID in the measurement result reported by the previous base station. Therefore, after receiving the S1 path switching request message, the MME performs member judgment on the UE according to the CSG ID. If the UE is a non-member and the cell access mode is a CSG cell, the member status assistance information should be set to indicate that the UE is not trusted.
  • the UE is a malicious (non-normal) UE, or the UE and the MME are inconsistent in the judgment of the member, so if the member status assistance information originally indicates that the UE is trusted, normal, or the member determines the agreement, the MME is more New member status assistance information. If the MME determines that the member of the UE is a member and the access mode of the cell is a CSG cell (indicating that the UE and the MME agree with the member), the member status assistance information may be set to indicate that the UE is trusted, normal, or the member is consistent.
  • the MME updates the member status assistance information.
  • the algorithm for updating the member status auxiliary information by the MME may also be combined with a mechanism such as a counter or a timer. For example, the member status auxiliary information is updated only when it is determined that the consistent cumulative number exceeds a certain numerical condition, and the counter pair for triggering the member status auxiliary information update is triggered. The conditions from trusted to untrusted or never trusted to trusted may not be the same.
  • the MME After the MME completes the member state determination and updates the member state assistance information if necessary, if the target cell is a hybrid cell, or the target cell is a CSG cell and the MME determines that the UE is a member, the MME sends a path switch request to the target (home) base station.
  • a confirmation message optionally including a member status, which may also include (updated) member status assistance information.
  • the target home base station After receiving the path switching request acknowledgement message, if the target home base station has the member status auxiliary information, the target home base station saves or updates the information for subsequent handover; if the message has a member status (and no member status auxiliary information)
  • the target home base station compares the member status with the previous member status. If the previous member status is a member and the member status indicated by the MME is a non-member, the member status auxiliary information is updated to be untrusted, or unreliable, or non- The normal UE, or member judgment is inconsistent (if the previous member status assistance information is different); if the member status indicated by the MME is consistent with the previous member status or the MME does not indicate the member status, the member status assistance information is updated to be trusted.
  • the MME After the MME completes the member state determination and updates the member state assistance information if necessary, if the target cell is a CSG cell and the MME determines that the UE is a non-member, the MME sends a path switch request failure message to the target base station, and includes in the message. The reason for the failure. The cause value can be set to a non-member or member status error. After receiving the message or further receiving the UE context release message, the target base station releases the RRC connection with the UE and the context (so there is no need to save the member status assistance information again).
  • Step S802 The UE sends the source base station to the source base station. Reporting the measurement result, including the CSG ID of the measured cell and the member status of the UE;
  • Step S804 The source base station sends a handover required message to the MME, where the CSG ID of the target cell is included.
  • Step S806 The MME determines the member status according to the CSG ID.
  • Step S808 The MME updates the member status assistance information (if necessary).
  • Step S810 MME Sending a handover request message to the target base station, including member status assistance information; Step S812, the target base station saves the member status assistance information for subsequent handover.
  • the UE can report its measurement result to the neighboring cell to the serving base station. If the measured neighbor cell broadcasts a CSG ID (meaning the cell is a CSG cell or a hybrid cell), the UE includes the CSG ID in the measurement result.
  • a CSG ID meaning the cell is a CSG cell or a hybrid cell
  • the UE judges the member according to the CSG ID and the CSG white table maintained by itself (the CSG white list in which the UE is a member is stored in the CSG white table) Status, when it is judged as "member", the UE includes the member status of the UE (indicated as "member") in the measurement report. When it is judged that it is not a member, the member status of the UE is not included in the measurement report. In the case that the neighboring cell is a CSG cell, the UE only reports the cell that is determined to be a member.
  • the UE does not carry the member status in the measurement result, and the base station defaults the UE as a member of the reported CSG cell (the UE can be considered as This member status is implied in the measurement report).
  • the measurement result may also include a global cell identifier of the neighboring cell (CGI, which is abbreviated as CGI, and for E-UTRAN, the CGI is E-UTRAN Cell Global Identity, abbreviated as ECGI).
  • CGI global cell identifier of the neighboring cell
  • ECGI E-UTRAN Cell Global Identity
  • Some information of the base station may include membership status information of the UE, load of the neighboring base station, handover policy information from the core network, and the like. If the base station decides to initiate a handover to the target cell through the S1 handover, the base station sends a Handover Required message to the MME (Mobile Management Entity), and the message is sent through the S1 interface, and thus may also be referred to as an SI Handover Required message. If the target cell is a CSG cell or a hybrid cell, the message needs to carry the CSG ID of the target cell in addition to the information such as the identity of the target cell, and the target cell is also required to carry the target cell when the target cell is a hybrid cell. Mode (indicated as hybrid).
  • MME Mobile Management Entity
  • the member status information is optionally included in the handover required message, for example, when the target cell is a hybrid cell, the member status information indicates a member or a non-member.
  • the MME determines the membership of the UE according to the CSG ID in the message. If the MME determines that the member status is "member”, the MME updates the member status assistance information to be untrusted (trustworthiness is false), or unreliable (reliability is false), or untrue ( The authenticity is false), or the abnormal UE, or the membership consistency is false (if the previous member status assistance information takes a different value).
  • the MME If the member of the MME judges and receives it If the member status information is consistent (for example, both "members” or “non-members"), then the MME updates the member status assistance information to be trusted, or reliable, or true, or normal UE, or member consistency is true (if The previous member status auxiliary information takes a different value.
  • the MME After performing the completion status determination and updating the member status assistance information if necessary, if the target cell is a hybrid cell, or the target cell is a CSG cell and the MME determines that the UE is a member, the MME sends an S1 handover request to the target (home) base station.
  • the message includes the CSG ID of the target cell and the (updated) member status assistance information, and includes the member status when the target cell is a hybrid cell.
  • FIG. 9 is a second detailed flow of updating the member status assistance information in the S1 handover procedure.
  • the embodiment includes the following steps (step S902 to step S912): Step S902: The UE sends the source base station to the source base station. Reporting the measurement result, including the CSG ID of the measured cell and the member status of the UE; Step S904, the source base station sends a handover required message to the MME, where the CSG ID of the target cell is included; Step S906, the MME determines the member status according to the CSG ID; S908.
  • the MME updates the member status assistance information (if required).
  • Step S910 The MME sends a handover preparation failure message to the source base station.
  • Step S912 The source base station saves or updates the member status assistance information for subsequent handover. The process of this embodiment will be described in detail below.
  • the UE can report its measurement result to the neighboring cell to the serving base station. If the measured neighbor cell broadcasts a CSG ID (meaning the cell is a CSG cell or a hybrid cell), the UE includes the CSG ID in the measurement result.
  • a CSG ID meaning the cell is a CSG cell or a hybrid cell
  • the UE judges the member according to the CSG ID and the CSG white table maintained by itself (the CSG white list in which the UE is a member is stored in the CSG white table) Status, when it is judged as "member”, the UE includes the member status of the UE (indicated as "member") in the measurement report. When it is judged that it is not a member, the member status of the UE is not included in the measurement report.
  • the CSG ID and the CSG white table maintained by itself the CSG white list in which the UE is a member is stored in the CSG white table
  • CGI Cell Global Identity
  • E-UTRAN E-UTRAN Cell Global Identity
  • the serving base station receives the measurement report of the UE, and performs handover decision according to the information carried in the measurement report and some information of the base station. Some information of the base station may include membership status information of the UE, load of the neighboring base station, handover policy information from the core network, and the like. If the base station decides to initiate a handover to the target cell through the S1 handover, the base station sends a Handover Required message to the MME (Mobile Management Entity), and the message is sent through the S1 interface, and thus may also be referred to as an SI Handover Required message.
  • MME Mobile Management Entity
  • the message needs to carry the CSG ID of the target cell in addition to the information such as the identity of the target cell, and the target cell is also required to carry the target cell when the target cell is a hybrid cell.
  • Mode (indicated as hybrid).
  • the member status information is optionally included in the handover required message, for example, when the target cell is a hybrid cell, the member status information indicates a member or a non-member.
  • the MME determines the membership of the UE according to the CSG ID in the message.
  • the MME determines that the member status is "member”
  • the MME updates the member status assistance information to be untrusted (trustworthiness is false), or unreliable (reliability is false), or untrue ( The authenticity is false), or the abnormal UE, or the membership consistency is false (if the previous member status assistance information takes a different value).
  • the member of the MME determines that the member status information is consistent with the received member status information (for example, both "members" or "non-members)
  • the MME updates the member status assistance information to a trusted, or reliable, or authentic, or normal UE. , or member consistency is true (if the previous member state assistance information takes a different value).
  • the difference between this embodiment and the third embodiment lies in the action after the MME completes the member state determination and updates the member state assistance information if necessary. If the target cell is a CSG cell and the MME determines that the UE is a non-member, the MME sends a handover preparation failure message to the source base station, and includes a failure cause value in the message. The cause value can be set to a non-member or member status error.
  • the source base station may update the member status assistance information according to the message and the cause value, for example, setting the member status assistance information to be untrustworthy (the credibility is false), or unreliable (the reliability is false), or untrue (authenticity is false) ), or an abnormal UE, or membership consistency is false (if the previous member status assistance information takes a different value). If the MME carries the member status assistance information in the handover preparation failure message, the target base station may directly update/save the member status assistance information according to the information.
  • FIG. 10 is a detailed flowchart of updating member status assistance information in an access procedure. As shown in FIG.
  • this embodiment includes the following steps (step S1002 to step S1012): Step S1002: UE and base station perform access Process; Step S1004: The base station sends an initial UE message to the MME, where the CSG ID of the cell is included. Step S1006: The MME determines the member status according to the CSG ID. Step S1008: The MME updates the member status assistance information (if necessary); Step S1010, MME Sending an initial context setup request message to the base station; Step S1012, the base station saves the member status assistance information for subsequent handover.
  • Step S1002 UE and base station perform access Process
  • Step S1004 The base station sends an initial UE message to the MME, where the CSG ID of the cell is included.
  • Step S1006 The MME determines the member status according to the CSG ID.
  • the access procedure generally includes the following steps: The UE sends a random access preamble to the base station, the base station sends a random access response to the UE, and the UE sends an RRC connection setup request message to the base station, where the base station sends an RRC connection setup message to the UE. The UE sends an RRC connection setup complete message to the base station. Then, the base station sends an initial UE message to the MME, where the CSG ID of the access cell is carried.
  • the MME When the message carries the CSG ID and does not carry the cell access mode, the MME considers the cell as the cell. Closed cell). The MME performs membership status determination based on the CSG ID (for closed cells, that is, access control). If the MME determines that the UE is a non-member, the member status assistance information should be set to indicate that the UE is not trusted, or the UE is a malicious (abnormal) UE, or the UE and the MME are inconsistent, so if the member status assistance information is The MME updates the member status assistance information to indicate that the UE is trusted, normal, or the member is consistent.
  • the member status assistance information may be set to indicate that the UE is trusted, normal, or the member determines the consistency, if the member status assistance information originally indicates If the UE is not trusted, or the UE is a malicious (abnormal) UE, or the UE and the MME are inconsistent, the MME updates the member status assistance information.
  • the algorithm for updating the member status auxiliary information by the MME may also be combined with a mechanism such as a counter or a timer.
  • the member status auxiliary information is updated only when it is determined that the consistent cumulative number exceeds a certain numerical condition, and the counter pair for triggering the member status auxiliary information update is triggered.
  • the conditions from trusted to untrusted or never trusted to trusted may not be the same. For example, when changing from trusted to untrusted, only the current judgment is inconsistent, that is, updating the member state auxiliary information is untrustworthy, and never If the letter becomes credible, it will take several real reports to be updated.
  • the MME determines that the UE is a non-member, the MME sends a user context release request message to the base station, and includes a failure cause value in the message. The cause value can be set to a non-member or member status error.
  • an embodiment of the present invention further provides an apparatus for updating member status assistance information, which is disposed in an MME, and a schematic structural diagram thereof is shown in FIG. 11, and includes: a determining module 1101, configured to be a closed user group according to a cell.
  • the identifier is used to determine the member status of the UE, where the cell is the cell to be switched by the UE or the cell accessed by the UE; and the updating module 1102 is configured to update the saved member state auxiliary information corresponding to the UE according to the determination result.
  • the determining module 1101 is further configured to receive member status information of the UE; and the updating module 1102 is further configured to update the member status auxiliary information according to the member status information and the determination result.
  • the update module 1102 is further configured to set the member status assistance information to a predetermined value of one when the member status information is inconsistent with the determination result.
  • the member status information is inconsistent with the judgment result, including at least one of the following: member status information is a member, but the judgment result is a non-member; member status information is a non-member, but the judgment result is a member.
  • the update module 1102 is further configured to set the member status assistance information to a predetermined value two when the member status information is consistent with the determination result.
  • the determining module 1101 is further configured to receive the member status information sent by the base station, where the member status information is carried in any one of the following messages sent by the base station: a path switching request message, a handover required message, an initial UE message.
  • the update module 1102 is further configured to send the updated member status assistance information to the base station that transmits the member status information or the target base station of the UE by using any one of the following messages: path conversion request acknowledgement message, handover Request message, path conversion request failure message, and handover preparation failure message, initial context establishment request message.
  • the base station or the target base station that sends the member status information updates the base station that sends the member status information or the member status auxiliary information that is saved by the target base station according to the received member status assistance information; or the base station or the target base station that sends the member status information saves Member status assistance information corresponding to the UE.
  • the update module 1102 is further configured to send the member status information of the UE to the base station or the target base station that sends the member status information by using any one of the following messages: Path conversion request acknowledgement Information, handover request message, path conversion request failure message, and handover preparation failure message, initial context establishment request message.
  • the base station or the target base station that sends the member status information updates the member status auxiliary information corresponding to the UE that is saved by the base station that sends the member status information or the target base station according to the received member status information. If the received member status information indicates that the UE is a non-member, the base station or the target base station transmitting the member status information sets the member status assistance information to a predetermined value of one.
  • the base station type of the base station or the target base station that transmits the member status information includes: a home base station and a macro base station.
  • the determining module 1101 is further configured to receive access mode information of the cell; and the updating module 1102 is further configured to update the member status auxiliary information according to the access mode information and the determination result.
  • the update module 1102 is further configured to set the member state auxiliary information to a predetermined value one when the access mode corresponding to the access mode information is a closed type and the determination result is a non-member.
  • the update module 1102 is further configured to set the access mode corresponding to the access mode information to a closed type, and set the member status auxiliary information to a predetermined value two when the determination result is a member.
  • an embodiment of the present invention further provides a base station switching apparatus, which is disposed in a base station, and has a schematic structural diagram as shown in FIG. 12, including: a first receiving module 1201, configured to receive an updated member status of the MME. Information; The first execution module 1202 is configured to perform a handover decision according to the updated member status assistance information.
  • the embodiment of the present invention further provides another base station switching apparatus, which is disposed in a base station, and has a schematic structural diagram as shown in FIG.
  • the MME determines the member status of the UE according to the closed user group identifier of the cell, and updates the saved corresponding to the UE according to the determination result. Member status assistance information.
  • the MME updates the member status assistance information according to the judgment result, and does not completely depend on the member status information reported by the UE, and avoids the situation that the UE behavior and the member status auxiliary information are not synchronized.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.

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Abstract

本发明公开了一种成员状态辅助信息更新方法及装置、基站切换方法及装置，其中，成员状态辅助信息的更新方法包括：移动管理实体（MME）根据小区的封闭用户组标识判断用户设备（UE）的成员状态，其中，小区为UE待切换的小区或UE接入的小区；MME根据判断结果更新保存的与UE对应的成员状态辅助信息。采用本发明能够解决MME保存的成员状态辅助信息并不能够随时根据UE的行为及状态进行变更问题。

Description

成员状态辅助信息更新方法及装置、 基站切换方法及装置 技术领域 本发明涉及通信领域， 具体而言， 涉及一种成员状态辅助信息的更新方法及装置 以及一种基站切换方法及装置。 背景技术 在无线蜂窝通信系统中， 基站是为用户设备 （User Equipment, UE) 提供无线接 入的设备， 一个基站可能包括一个或多个服务小区。 小区可以有不同的接入模式 (Access Mode): 通常一个普通的小区可以为任何用户提供接入服务， 这种小区称为 开放小区； 而针对在家庭或企业等应用环境下需要限定允许接入的用户的需求， 一个 封闭用户组 （Closed Subscriber Group, CSG) 小区或称为封闭型 （Closed) 小区只能 允许规定的用户 （即成员） 接入； 或者一个混合型 （hybrid) 小区在优先为成员用户 提供接入的同时， 也可以为非成员用户提供接入服务。 通常， 封闭型小区或混合型小 区是家庭基站的一个典型特征， 虽然在某些情况下其它类型的基站 （例如宏基站） 也 可能配置封闭型或混合型小区。 目前， 当一个封闭型或混合型小区与其它小区相邻时， 用户有可能从相邻的其它 小区切换到封闭型或混合型的小区。一般来说，在长期演进系统（Long Term Evolution, LTE) 中切换有两种方式， 一种是信令经过移动性管理实体 （Mobility Management Entity, MME)的 SI切换， 一种是直接在两个基站间传递信令的 X2切换。 X2切换相 比 S1切换有更短的时延和更小的开销。然而，封闭型小区需要对接入的用户进行接入 控制（即限制允许接入的用户）， 混合型小区需要对接入的用户进行成员验证（即区分 成员和非成员）， 在现有的 LTE技术中， 接入控制或成员身份验证的功能是由 MME 实现的， 因此在用户从相邻小区切换到封闭型小区或者混合型小区时， 经常需要从源 基站发起 S1切换， 这样导致了较大的时延和开销。 在切换过程中， 由于小区的变化， UE自身的成员状态可能也是变化的， 例如， 在 源小区中 UE是该小区的成员， 但是 UE并不是目标小区的成员， 在基站的上报过程 中， 可能将其上报为成员， 这就会导致 UE的成员状态信息不一致。 MME目前采用成 员状态辅助信息对 UE的成员状态进行认证， 但是， 相关技术中， MME保存的成员状 态辅助信息并不能够随时根据 UE的行为及状态进行变更， 这就导致后续 MME在切 换过程中无法确认 UE是否能够满足切换条件， 可能出现 UE满足切换条件但是无法 切换到待切换小区 （即目标小区）， UE无法接入其申请的业务或服务， 或者， UE不 满足切换条件但是将其切换到目标小区， 为其提供业务或服务。 针对相关技术中 MME保存的成员状态辅助信息并不能够随时根据 UE的行为及 状态进行变更， 这就导致后续 MME在切换过程中无法确认 UE是否能够满足切换条 件， 可能出现 UE满足切换条件但是无法切换到目标小区， UE无法接入其申请的业务 或服务， 或者， UE不满足切换条件但是将其切换到目标小区， 为其提供业务或服务的 问题， 目前尚未提出有效的解决方案。 发明内容 本发明实施例的主要目的在于提供一种成员状态辅助信息更新方法及装置、 基站 切换方法及装置， 以至少解决上述 MME保存的成员状态辅助信息并不能够随时根据 UE的行为及状态进行变更问题。 根据本发明实施例， 提供了一种成员状态辅助信息的更新方法， 包括： 移动管理 实体 （MME) 根据小区的封闭用户组标识判断用户设备 （UE) 的成员状态， 其中， 所述小区为所述 UE待切换的小区或所述 UE接入的小区；所述 MME根据判断结果更 新保存的与所述 UE对应的成员状态辅助信息。 优选的， 所述 MME根据小区的封闭用户组标识判断所述 UE的成员状态之前， 包括： 所述 MME接收所述 UE的成员状态信息； 所述 MME根据判断结果更新保存 的与所述 UE对应的成员状态辅助信息， 包括： 所述 MME根据所述成员状态信息和 所述判断结果更新所述成员状态辅助信息。 优选的， 所述 MME根据所述成员状态信息和所述判断结果更新所述成员状态辅 助信息， 包括： 所述成员状态信息与所述判断结果不一致时， 所述 MME将所述成员 状态辅助信息设置为预定值一。 优选的， 所述成员状态信息与所述判断结果不一致， 包括以下至少之一： 所述成 员状态信息为成员， 但所述判断结果为非成员； 所述成员状态信息为非成员， 但所述 判断结果为成员。 优选的， 所述 MME根据所述成员状态信息和所述判断结果更新所述成员状态辅 助信息， 包括： 所述成员状态信息与所述判断结果一致时， 所述 MME将所述成员状 态辅助信息设置为预定值二。 优选的， 所述 MME接收所述 UE的成员状态信息， 包括： 所述 MME接收基站 发送的所述成员状态信息， 其中， 所述成员状态信息携带在所述基站发送的下列任意 一项消息中： 路径转换请求消息、 切换需要消息、 初始 UE消息。 优选的， 所述 MME根据判断结果更新保存的与所述 UE对应的成员状态辅助信 息之后， 还包括： 所述 MME利用下列任意一项消息将更新后的成员状态辅助信息发 送至发送所述成员状态信息的基站或者所述 UE的目标基站：路径转换请求确认消息、 切换请求消息、 路径转换请求失败消息以及切换准备失败消息、 初始上下文建立请求 消息。 优选的， 所述 MME将更新后的成员状态辅助信息发送至发送所述成员状态信息 的基站或者所述目标基站之后， 还包括： 所述发送所述成员状态信息的基站或者所述 目标基站根据接收的成员状态辅助信息更新所述发送所述成员状态信息的基站或者所 述目标基站保存的与所述 UE对应的成员状态辅助信息； 或者所述发送所述成员状态 信息的基站或者所述目标基站保存与所述 UE对应的成员状态辅助信息。 优选的， 所述 MME根据判断结果更新保存的与所述 UE对应的成员状态辅助信 息之后， 还包括： 所述 MME利用下列任意一项消息将所述 UE的成员状态信息发送 至所述发送所述成员状态信息的基站或者所述目标基站： 路径转换请求确认消息、 切 换请求消息、 路径转换请求失败消息以及切换准备失败消息、 初始上下文建立请求消 息。 优选的， 所述 MME将所述 UE的成员状态信息发送至所述发送所述成员状态信 息的基站或者所述目标基站之后， 还包括： 所述发送所述成员状态信息的基站或者所 述目标基站根据接收的成员状态信息更新所述发送所述成员状态信息的基站或者所述 目标基站保存的与所述 UE对应的成员状态辅助信息。 优选的， 所述发送所述成员状态信息的基站或者所述目标基站根据接收的成员状 态信息更新所述发送所述成员状态信息的基站或者所述目标基站保存的与所述 UE对 应的成员状态辅助信息， 包括： 若所述接收的成员状态信息指示所述 UE为非成员， 所述源基站或目标基站将所述成员状态辅助信息设置为预定值一。 优选的， 所述发送所述成员状态信息的基站或者所述目标基站的基站类型包括： 家庭基站和宏基站。 优选的， 所述 MME根据小区的封闭用户组标识判断所述 UE的成员状态之前， 包括： 所述 MME接收所述小区的接入模式信息； 所述 MME根据判断结果更新保存 的与所述 UE对应的成员状态辅助信息， 包括： 所述 MME根据所述接入模式信息和 所述判断结果更新所述成员状态辅助信息。 优选的， 所述 MME根据所述接入模式信息和所述判断结果更新所述成员状态辅 助信息， 包括： 所述接入模式信息对应的接入模式为封闭型， 且所述判断结果为非成 员时， 所述 MME将所述成员状态辅助信息设置为预定值一。 优选的， 所述 MME根据所述接入模式信息和所述判断结果更新所述成员状态辅 助信息， 包括： 所述接入模式信息对应的接入模式为封闭型， 且所述判断结果为成员 时， 所述 MME将所述成员状态辅助信息设置为预定值二。 根据本发明另一实施例， 提供了一种基站切换方法， 包括： 基站接收移动管理实 体 （MME) 更新后的成员状态辅助信息， 其中， 所述成员状态辅助信息由所述 MME 根据小区的封闭用户组标识判断用户设备（UE) 的成员状态的判断结果更新； 所述基 站根据所述更新后的成员状态辅助信息执行切换判决。 优选的， 所述基站根据所述更新后的成员状态辅助信息执行切换判决， 包括： 所 述成员状态辅助信息为预定值一时，所述基站与待切换的基站间采用 S1切换；所述成 员状态辅助信息为预定值二时， 所述基站与所述待切换的基站间采用 X2切换。 优选的， 所述基站包括： 家庭基站和宏基站。 根据本发明另一实施例， 提供了另一种基站切换方法， 包括： 基站接收移动管理 实体 （MME) 发送的用户设备 （UE) 的成员状态信息； 所述基站根据所述成员状态 信息更新成员状态辅助信息， 并根据更新后的成员状态辅助信息执行切换判决。 根据本发明另一实施例， 提供了一种成员状态辅助信息的更新装置， 设置在移动 管理实体（MME) 中， 包括： 判断模块， 设置为根据小区的封闭用户组标识判断用户 设备 （UE) 的成员状态， 其中， 所述小区为所述 UE待切换的小区或所述 UE接入的 小区； 更新模块， 设置为根据判断结果更新保存的与所述 UE对应的成员状态辅助信 息。 根据本发明实施例的另一个方面， 提供了一种基站切换装置， 设置在基站中， 包 括： 第一接收模块， 设置为接收移动管理实体 （MME) 更新后的成员状态辅助信息； 第一执行模块， 设置为根据所述更新后的成员状态辅助信息执行切换判决。 根据本发明实施例的另一个方面，提供了另外一种基站切换装置， 设置在基站中， 包括： 第二接收模块， 设置为接收移动管理实体 （MME) 发送的用户设备 （UE) 的 成员状态信息； 第二执行模块， 设置为根据所述成员状态信息更新成员状态辅助信息， 并根据更新后的成员状态辅助信息执行切换判决。 在本发明实施例中， MME根据小区的封闭用户组标识判断 UE的成员状态， 并根 据判断结果更新保存的与 UE对应的成员状态辅助信息。 当 UE开始出现上报的成员 状态不真实的情况时， MME根据判断结果去更新成员状态辅助信息， 并不完全依赖 于 UE上报的成员状态信息， 避免出现 UE行为与成员状态辅助信息不同步的情况。 附图说明 此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部分， 本发 明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的不当限定。 在附图 中： 图 1是根据本发明实施例的部署了家庭基站的 E-UTRAN系统架构； 图 2是根据本发明实施例的成员状态辅助信息的更新方法的处理流程图； 图 3是根据本发明实施例的基站切换方法的处理流程图； 图 4是根据本发明实施例的实施例一的更新成员状态辅助信息的处理流程图； 图 5是根据本发明实施例的实施例一的更新成员状态辅助信息的细化流程图一； 图 6是根据本发明实施例的实施例一的更新成员状态辅助信息的细化流程图二； 图 7是根据本发明实施例的实施例二的在 X2切换流程中更新成员状态辅助信息 的处理流程图； 图 8是根据本发明实施例的实施例三的在 S1切换流程中更新成员状态辅助信息的 处理流程图； 图 9是根据本发明实施例的实施例四的在 S1切换流程中更新成员状态辅助信息的 处理流程图； 图 10 是根据本发明实施例的实施例五的在接入流程中更新成员状态辅助信息的 处理流程图； 图 11是根据本发明实施例的成员状态辅助信息的更新装置的结构示意图； 图 12是根据本发明实施例的基站切换装置的第一种结构示意图； 图 13是根据本发明实施例的基站切换装置的第二种结构示意图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 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组合。 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 （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。
LTE系统中家庭基站被称为 HeNB (home e B)。 He B所支持的功能与增进型基 站 （enhanced NodeB, e B) 类似， HeNB与移动核心网演进 (Evolved Packet Core, EPC)之间的进程和 eNB与 EPC之间类似。由于 HeNB的布署通常没有经过移动运营 商的网络规划， 通常 HeNB的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 , 在演进通用移动通信系统陆地无线接入网 （Evolved Universal Mobile Telecommunications System Territorial Radio Access Network, E-UTRAN) 架构 下，还可能在 HeNB与 EPC的 SI连接之间引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 SI代理连接 MME。 HeNB之间 存在 X2直接接口， 可进行负荷均衡， 切换优化， 信息交互等操作， E-UTRAN架构示 意图如图 1所示。 由于 HeNB 只为特定用户提供服务， 因此引入了封闭成员组 CSG ( Closed Subscriber Group) 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：封闭型（CSG)小区（仅注册为 CSG成员的 UE可以接入）， 混合型 （hybrid) 小区 （普通终端可以接入， 但注册为 CSG成员的 UE能以更高优先 级的成员身份接入）， 开放性 （Open) 小区 （任意 UE都可接入）。 HeNB的接入模式 和 CSG ID可在空口进行广播。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 (而不广播接入模式），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。 UE在连接态切换到封闭型或混合型 He B可以通过 S1或 X2切换流程完成。 由 于需要 MME做接入控制， 一般情况下只能采用 S1切换流程。 相比较而言， X2切换 流程不需要核心网参与， 切换流程更加简洁高效。 而现有的标准协议中， 仅在少数不 需要 MME做接入控制 /成员验证， 且满足 X2切换基本条件 （源基站和目的基站之间 有 X2接口， 且都连接在同一个 MME池 （MME pool)) 的情况下可以采用 X2切换流 程， 即两个拥有相同 CSG ID的 CSG/hybrid小区间切换， 或目标小区是 Open小区时 可采用 X2切换流程。 实际上， 在切换之前， 源基站需要根据 UE对相邻小区的测量报告来执行切换决 策， 其中包括选择目标小区。 例如， 当相邻小区是封闭型或混合型小区时， 普通的流 程需要 UE上报封闭型小区或混合型小区的封闭用户组标识 （CSG ID) 以及 UE的成 员状态， 因此， 一种改进的办法是利用 UE上报的成员状态以及成员状态辅助信息共 同进行切换决策， 其中， 成员状态辅助信息指示 UE上报的成员状态的可信度、 可靠 性、 准确性或者说 UE上报的成员状态与 MME判断的成员状态的一致性， 或者指示 UE是正常 UE还是非正常 UE (非正常 UE上报的成员状态是有问题的）。采用这种办 法可以对不同的 UE采用不同的切换策略， 例如， 当成员状态辅助信息指示 UE上报 的成员状态与移动管理实体的判断的成员状态的一致性为真时， 基站则可使用 UE上 报的成员状态进行优化的切换决策。 采用利用 UE上报的成员状态以及成员状态辅助信息共同进行切换决策的方法需 要解决的一个问题就是成员状态辅助信息的更新问题， 例如成员状态辅助信息可作为 UE 上下文信息的一部分保存在 MME 上和服务基站上， 也可作为其它信息保存在 MME上和服务基站上。 当 UE开始出现上报的成员状态不真实的情况时， 如何及时地 更新成员状态辅助信息， 以使在此之后基站不再完全依赖于 UE上报的成员状态信息 进行切换判决， 而是回退到传统的切换判决和执行流程， 避免出现 UE行为与成员状 态辅助信息不同步的情况。 基于上述技术问题， 本发明实施例提供了一种成员状态辅助信息的更新方法， 以 及时反映 UE上报的成员状态的可信度或准确性， 以使切换判决和执行流程跟随 UE 行为的变化而变化，从而减少切换时延和开销，其处理流程如图 2所示，包括步骤 S202 至步骤 S204: 步骤 S202、 MME根据小区的封闭用户组标识判断 UE的成员状态； 其中， 小区为 UE待切换的小区或 UE接入的小区； 步骤 S204、 MME根据判断结果更新保存的与 UE对应的成员状态辅助信息。 在本发明实施例中， MME根据小区的封闭用户组标识判断 UE的成员状态， 并根 据判断结果更新保存的与 UE对应的成员状态辅助信息。 当 UE开始出现上报的成员 状态不真实的情况时， MME根据判断结果去更新成员状态辅助信息， 并不完全依赖 于 UE上报的成员状态信息， 避免出现 UE行为与成员状态辅助信息不同步的情况。 实施时， 一种优选的实施例中， MME在根据目标小区的封闭用户组标识判断 UE 的成员状态之前， 接收 UE的成员状态信息， 进而 MME根据成员状态信息和判断结 果更新成员状态辅助信息。 具体的， 若成员状态信息与判断结果不一致时， MME将成员状态辅助信息设置 为预定值一。 成员状态信息与判断结果不一致， 包括： 成员状态信息为成员， 但判断 结果为非成员； 或者， 成员状态信息为非成员， 但判断结果为成员。 具体的， 若成员状态信息与判断结果一致时， MME将成员状态辅助信息设置为 预定值二。 其中， 预定值一以及预定值二是成员状态辅助信息的一种指定值， 能够指示不同 的成员状态， 例如， UE正常、 不正常、 有效、 无效、 可信、 不可信、 成员判断一致、 成员判断不一致、 恶意， 等等。 通常情况下， 成员状态信息与判断结果不一致时， 选 择预定值一， 其示意 UE不可信或恶意等等， 而成员状态信息与判断结果一致时， 选 择预定值二， 其示意 UE可信或有效， 等等。 具体的成员状态根据实际情况而定。 上文提到， MME接收成员状态信息，优选的，成员状态信息由基站发送至 MME， 其中， 成员状态信息携带在基站发送的下列任意一项消息中： 路径转换请求消息、 切 换需要消息、初始 UE消息。实施时，成员状态信息还可能携带在其他基站发送至 MME 的消息中， 根据具体情况而定。 实施时， MME根据判断结果更新保存的与 UE对应的成员状态辅助信息之后，还 包括： MME利用下列任意一项消息将更新后的成员状态辅助信息发送至发送成员状 态信息的基站或者 UE的目标基站： 路径转换请求确认消息、 切换请求消息、 路径转 换请求失败消息以及切换准备失败消息、 初始上下文建立请求消息。 MME将更新后 的成员状态辅助信息发送至上述基站之后， 相应的基站在后续处理中会根据接收的成 员状态辅助信息更新基站保存的与 UE对应的成员状态辅助信息， 例如， 若根据接收 的成员状态辅助信息指示成员状态为非成员， 相应的基站将成员状态辅助信息设置为 预定值一。 当然， 在具体实施时， 发送成员状态信息的基站或者 UE的目标基站中可 能出现原始并没有保存成员状态辅助信息的情况， 此时， 上述基站直接保存接收的成 员状态辅助信息就可以， 不需要对已有的信息进行更新。 MME 除将成员状态辅助信息发送至相应的基站之外， 在另外一个优选的实施例 中， 还可以将成员状态信息发送至上述基站， 携带成员状态信息的消息可以是下列任 意一项： 路径转换请求确认消息、 切换请求消息、 路径转换请求失败消息以及切换准 备失败消息、 初始上下文建立请求消息。 实施时， 成员状态信息还可能携带在 MME 发送至基站的消息中， 根据具体情况而定。
MME将 UE的成员状态信息发送至发送成员状态信息的基站或者目标基站之后， 相应的基站可以根据接收的成员状态信息更新自身保存的与 UE对应的成员状态辅助 信息。 例如， 若接收的成员状态信息指示 UE为非成员， 相应的基站将成员状态辅助 信息设置为预定值一。 与上面各实施例相类似， 本实施例中， 发送成员状态信息的基站或者目标基站的 基站类型包括： 家庭基站和宏基站。 即， 本发明上述各实施方案中提到的基站优选的 类型均可以包括家庭基站和宏基站。 除根据用户状态信息及 MME的判断结果更新成员状态辅助信息外， 本发明实施 例还提供了另外一种优选的实施例中， 本例中， MME接收目标小区的目标小区接入 模式信息， MME根据目标小区接入模式信息和判断结果更新成员状态辅助信息。 在本例中， 若目标小区接入模式信息对应的目标小区接入模式为封闭型， 且判断 结果为非成员时， MME将成员状态辅助信息设置为预定值一。 若目标小区接入模式信息对应的目标小区接入模式为封闭型， 且判断结果为成员 时， MME将成员状态辅助信息设置为预定值二。 在更新了成员状态辅助信息后， 基站就可能利用更新后的成员状态辅助信息进行 切换判断， 以使切换判决和执行流程跟随 UE行为的变化而变化， 从而减少切换时延 和开销， 相应的， 基于同一发明构思， 本发明实施例提供了一种基站切换方法， 其处 理流程如图 3所示， 包括步骤 S302至步骤 S304: 步骤 S302、 基站接收 MME更新后的成员状态辅助信息； 其中， 成员状态辅助信息由 MME根据小区的封闭用户组标识判断 UE的成员状 态的判断结果更新； 步骤 S304、 基站根据更新后的成员状态辅助信息执行切换判决。 优选的，当成员状态辅助信息为预定值一时，基站与待切换的基站间采用 S1切换； 当成员状态辅助信息为预定值二时， 基站间与待切换的基站间采用 X2切换。 本发明实施例中涉及的基站包括家庭基站和宏基站。 基于同一发明构思， 本发明实施例还提供了另外一种基站切换方法， 具体步骤如 下： 基站接收 MME发送的 UE的成员状态信息； 基站根据成员状态信息更新成员状 态辅助信息， 并根据更新后的成员状态辅助信息执行切换判决。 为将本发明实施例提供的成员状态辅助信息的更新方法以及基站切换方法阐述地 更清楚更明白， 现以具体实施例对其进行说明。 实施例一 图 4是在切换流程中更新成员状态辅助信息的流程图； 如图 4所示， 本实施例包 括以下步骤 （步骤 S402至步骤 S404): 步骤 S402、 移动管理实体根据封闭用户组标识判断成员状态； 步骤 S404、 移动管理实体更新成员状态辅助信息。 图 5是更新成员状态辅助信息的细化流程图一， 如图 5所示， 本细化流程包括以 下步骤 （步骤 S502至步骤 S506): 步骤 S502、 移动管理实体接收成员状态信息； 步骤 S504、 移动管理实体根据封闭用户组标识判断成员状态； 步骤 S506、移动管理实体根据接收到的成员状态信息和自身判断的成员状态更新 成员状态辅助信息。 图 6是更新成员状态辅助信息的细化流程图二； 如图 6所示， 本细化流程包括以 下步骤 （步骤 S602至步骤 S606): 步骤 S602、 移动管理实体接收目标小区接入模式信息； 步骤 S604、 移动管理实体根据封闭用户组标识判断成员状态； 步骤 S606、移动管理实体根据目标小区接入模式信息和自身判断的成员状态更新 成员状态辅助信息。 实施例二 图 7是在 X2切换流程中更新成员状态辅助信息的详细流程图， 如图 7所示， 本 实施例包括以下步骤 （步骤 S702至步骤 S716): 步骤 S702、 UE向源基站报告测量结果， 其中包括所测小区的 CSG ID和 （可选 的） UE的成员状态； 步骤 S704、 源基站向目标基站发送切换请求消息； 步骤 S706、 目标基站、 源基站与 UE间进行后续切换准备以及切换执行流程； 步骤 S708、 目标基站向 MME发送路径转换请求消息， 其中包括 CSG ID； 步骤 S710、 MME判断成员状态； 步骤 S712、 MME (在需要时） 更新成员状态辅助信息； 步骤 S714、 MME向目标基站发送路径转换请求确认消息； 步骤 S716、 目标基站保存或更新成员状态辅助信息以用于后续切换。 下面结合图 7的步骤详细阐述本实施例的具体应用。 在连接态下， UE能够向服务基站报告其对相邻小区的测量结果。如果所测相邻小 区广播了 CSG ID (意味着小区为 CSG小区或 hybrid小区）， 则 UE在测量结果中包括
CSG ID。 如果相邻小区广播了接入模式 （意味着该小区为 hybrid小区）， 则 UE根据
CSG ID以及其自身维护的 CSG白表 （CSG白表中保存了 UE身为成员的 CSG ID列 表）判断成员状态， 当判断为"成员"时， UE在测量报告中包括 UE的成员状态（指示 为"成员"）， 当判断不是成员时， 测量报告中不包括 UE 的成员状态。 在相邻小区为 CSG小区的情况下， UE仅上报自身判断为成员的小区， 因而对于 CSG小区 UE在测 量结果中不用携带成员状态， 基站默认 UE为上报的 CSG小区的成员 （可以认为 UE 在测量报告中隐含了这一成员状态）。测量结果中还可以包括相邻小区的全球小区标识
( Cell Global Identity,缩写为 CGI，对于 E-UTRAN来说 CGI即为 E-UTRAN Cell Global
Identity, 缩写为 ECGI)。 服务基站 （在切换场景下服务基站即为源基站） 收到 UE的 测量报告后， 根据测量报告中携带的信息以及基站自有的一些信息进行切换判决。 基 站自有的一些信息可能包括 UE的成员状态辅助信息， 相邻基站的负载， 来自核心网 的切换策略信息等。 如果基站决定了通过 X2切换向目标小区发起切换， 则基站向目 标基站发送切换请求 （Handover Request) 消息， 该消息通过 X2接口发送， 因而也称 为 X2 Handover Request消息。如果目标小区为 hybrid小区， 则消息中除了携带目标小 区的标识等信息以外， 还需携带 CSG成员状态 （指示为成员或非成员）。 目标基站收 到 X2切换请求消息后与源基站、 UE—起完成切换准备和切换执行流程。 在切换执行 流程完成时， UE已经接入到目标基站，然后目标基站向 MME发送路径转换请求（Path Switch Request) 消息， 以将下行用户面路径的基站端从源基站转移到目标基站 （意味 着来自 S-GW的下行数据不再发给源基站，而是发给目标基站）。路径转换请求消息中 包括 UE接入小区的全球小区标识， UE接入小区大多情况下就是源基站选择的目标小 区。在目标小区为 CSG小区的情况下，路径转换请求消息中包括 UE接入小区的 CSG ID, 由于只有成员 UE可以接入 CSG小区， 因而目标小区为 CSG小区时不需要在路 径转换请求消息中携带成员状态； 在目标小区为 hybrid小区的情况下， 路径转换请求 消息中包括 UE接入小区的 CSG ID， 小区的接入模式 （指示为 hybrid), 以及成员状 态信息 （指示为成员或非成员）， 该信息应该来源于源基站发的 X2切换请求消息， 也 就是说间接来源于 UE在上一基站处的测量报告。
MME收到 S1路径转换请求消息后， 根据 CSG ID判断 UE是否为该 CSG的成员 (对于封闭型小区该过程可称为接入控制， 而对于混合型小区该过程可称为成员验 证）。 当小区接入模式为 hybrid时， MME如果判断 UE为非成员而收到的成员状态信 息指示为成员， 则成员状态辅助信息应设为指示该 UE不可信、 或该 UE为恶意 （非 正常） UE、 或 UE与 MME的成员判断不一致（对应预定值二）， 因此如果成员状态辅 助信息原来为指示该 UE可信、 正常或者成员判断一致 （对应预定值一）， 则 MME更 新成员状态辅助信息。成员状态辅助信息可作为 UE上下文信息的一部分保存在 MME 上和服务基站上， 也可作为其它信息保存在 MME上和服务基站上。 如果判断 UE为 成员而成员状态辅助信息指示为非成员， 这种情况可能不太会出现， MME 的行为可 以根据其它考虑而定。如果 MME对 UE的成员判断与接收到的成员状态信息一致（即 二者皆指示为成员或者皆指示为非成员），则成员状态辅助信息可以设为指示该 UE可 信、 正常或者成员判断一致， 如果成员状态辅助信息原来为指示该 UE不可信、 或该 UE为恶意（非正常） UE、 或 UE与 MME的成员判断不一致， 则 MME更新成员状态 辅助信息。 当小区接入模式为 CSG小区时， 由于仅有成员 UE可接入 CSG小区， 因此 UE 接入到该小区意味着 UE在前一基站处上报的测量结果中指示 UE为该 CSG ID的成 员。 因此， MME在收到 S1路径转换请求消息后， 根据 CSG ID对 UE进行成员判断， 如果 UE为非成员而该小区接入模式为 CSG小区， 则成员状态辅助信息应设为指示该 UE不可信、 或该 UE为恶意（非正常） UE、 或 UE与 MME的成员判断不一致， 因此 如果成员状态辅助信息原来为指示该 UE可信、 正常或者成员判断一致， 则 MME更 新成员状态辅助信息。 如果 MME对 UE的成员判断为成员且该小区接入模式为 CSG 小区 （说明 UE和 MME对成员的判断一致）， 则成员状态辅助信息可以设为指示该 UE可信、 正常或者成员判断一致， 如果成员状态辅助信息原来为指示该 UE不可信、 或该 UE为恶意 （非正常） UE、 或 UE与 MME的成员判断不一致， 则 MME更新成 员状态辅助信息。 以上 MME更新成员状态辅助信息的算法还可以结合计数器或者定时器等机制， 例如， 仅当判断一致的累计次数超过一定数值条件时才更新成员状态辅助信息， 而且 触发成员状态辅助信息更新的计数器对从可信变为不可信或者从不可信变为可信的条 件可以并不相同， 例如， 当从可信变为不可信只需要当前判断不一致即更新成员状态 辅助信息为不可信， 而从不可信变为可信则需要多次真实上报才能更新。 在 MME完成成员状态判断并在需要的情况下更新成员状态辅助信息后， 如果目 标小区为 hybrid小区， 或者目标小区为 CSG小区且 MME判断 UE为成员， MME向 目标 （家庭） 基站发送路径转换请求确认消息， 该消息中可选包括成员状态， 该消息 中还可包括 （更新后的） 成员状态辅助信息。 目标家庭基站收到路径转换请求确认消 息后， 如果消息中有成员状态辅助信息， 则目标家庭基站保存或更新该信息以备后续 切换使用； 如果消息中有成员状态（而没有成员状态辅助信息）， 则目标家庭基站根据 该成员状态与之前的成员状态对比， 如果之前的成员状态为成员而 MME指示的成员 状态为非成员， 则将成员状态辅助信息更新为不可信、 或不可靠、 或非正常 UE、 或成 员判断不一致（如果之前的成员状态辅助信息与此不同）； 如果 MME指示的成员状态 与之前的成员状态一致或者 MME并未指示成员状态， 则将成员状态辅助信息更新为 可信、或可靠或正常 UE、或成员判断一致（如果之前的成员状态辅助信息与此不同）。 在 MME完成成员状态判断并在需要的情况下更新成员状态辅助信息后， 如果目 标小区为 CSG小区且 MME判断 UE为非成员， 则 MME向目标基站发送路径转换请 求失败消息， 并在消息中包括失败的原因值。 该原因值可以设为非成员或者成员状态 错误。 目标基站收到该消息后或者进一步地收到 UE上下文释放消息后， 释放与 UE 的 RRC连接以及上下文 （因此这种情况不需要再保存成员状态辅助信息）。 实施例三 图 8是在 S1切换流程中更新成员状态辅助信息的第一种详细流程， 如图 8所示， 本实施例包括以下步骤 （步骤 S802至步骤 S812): 步骤 S802、 UE向源基站报告测量结果，其中包括所测小区的 CSG ID和 UE的成 员状态； 步骤 S804、 源基站向 MME发送切换需要消息， 其中包括目标小区的 CSG ID; 步骤 S806、 MME根据 CSG ID判断成员状态； 步骤 S808、 MME更新成员状态辅助信息 （如果有需要）； 步骤 S810、 MME向目标基站发送切换请求消息， 其中包括成员状态辅助信息； 步骤 S812、 目标基站保存成员状态辅助信息以用于后续切换。 下面结合图 8的步骤详细阐述本实施例的具体应用。 在连接态下， UE能够向服务基站报告其对相邻小区的测量结果。如果所测相邻小 区广播了 CSG ID (意味着小区为 CSG小区或 hybrid小区）， 则 UE在测量结果中包括 CSG ID。 如果相邻小区广播了接入模式 （意味着该小区为 hybrid小区）， 则 UE根据 CSG ID以及其自身维护的 CSG白表 （CSG白表中保存了 UE身为成员的 CSG ID列 表）判断成员状态， 当判断为"成员"时， UE在测量报告中包括 UE的成员状态（指示 为"成员"）， 当判断不是成员时， 测量报告中不包括 UE 的成员状态。 在相邻小区为 CSG小区的情况下， UE仅上报自身判断为成员的小区， 因而对于 CSG小区 UE在测 量结果中不用携带成员状态， 基站默认 UE为上报的 CSG小区的成员 （可以认为 UE 在测量报告中隐含了这一成员状态）。 测量结果中还可包括相邻小区的全球小区标识 ( Cell Global Identity,缩写为 CGI，对于 E-UTRAN来说 CGI即为 E-UTRAN Cell Global Identity, 缩写为 ECGI)。 服务基站 （在切换场景下服务基站即为源基站） 收到 UE的 测量报告后， 根据测量报告中携带的信息以及基站自有的一些信息进行切换判决。 基 站自有的一些信息可能包括 UE的成员状态辅助信息， 相邻基站的负载， 来自核心网 的切换策略信息等。如果基站决定了通过 S1切换向目标小区发起切换，则基站向 MME (移动管理实体）发送切换需要（Handover Required)消息， 该消息通过 S1接口发送， 因而也可称为 SI Handover Required消息。 如果目标小区为 CSG小区或 hybrid小区， 贝 U消息中除了携带目标小区的标识等信息以外，还需要携带目标小区的 CSG ID, 而在 目标小区为 hybrid小区时， 还需携带目标的小区接入模式 （指示为 hybrid)。 在切换需要消息中可选地包括成员状态信息，例如， 当目标小区为 hybrid小区时， 成员状态信息指示成员或非成员。 MME收到切换需要消息后， 根据消息中的 CSG ID 对 UE的成员身份进行判断。 如果 MME判断为非成员而接收到的成员状态为"成员"， 则 MME将成员状态辅助信息更新为不可信（可信度为假）、 或不可靠（可靠性为假）、 或不真实 （真实性为假）、 或非正常 UE、 或成员一致性 （membership consistency) 为 假（如果此前的成员状态辅助信息取值与此不同）。如果 MME的成员判断与接收到的 成员状态信息一致 （例如都为"成员"或都为 "非成员"）， 则 MME将成员状态辅助信息 更新为可信、 或可靠、 或真实、 或正常 UE、 或成员一致性为真（如果此前的成员状态 辅助信息取值与此不同）。 在进行完成员状态判断并在需要的情况下更新成员状态辅助信息后， 如果目标小 区为 hybrid小区， 或者目标小区为 CSG小区且 MME判断 UE为成员， MME向目标 (家庭）基站发送 S1 切换请求消息，该消息中包括目标小区的 CSG ID和（更新后的） 成员状态辅助信息， 并当目标小区为 hybrid小区时还包括成员状态。 目标家庭基站收 到 S1切换请求消息后， 目标家庭基站保存成员状态辅助信息以备后续切换使用。 实施例四 图 9是在 S1切换流程中更新成员状态辅助信息的第二种详细流程， 如图 9所示， 本实施例包括以下步骤 （步骤 S902至步骤 S912): 步骤 S902、 UE向源基站报告测量结果，其中包括所测小区的 CSG ID和 UE的成 员状态； 步骤 S904、 源基站向 MME发送切换需要消息， 其中包括目标小区的 CSG ID; 步骤 S906、 MME根据 CSG ID判断成员状态； 步骤 S908、 MME更新成员状态辅助信息 （如果有需要）； 步骤 S910、 MME向源基站发送切换准备失败消息； 步骤 S912、 源基站保存或更新成员状态辅助信息以用于后续切换.。 下面详细阐述本实施例的过程。 在连接态下， UE能够向服务基站报告其对相邻小区的测量结果。如果所测相邻小 区广播了 CSG ID (意味着小区为 CSG小区或 hybrid小区）， 则 UE在测量结果中包括 CSG ID。 如果相邻小区广播了接入模式 （意味着该小区为 hybrid小区）， 则 UE根据 CSG ID以及其自身维护的 CSG白表 （CSG白表中保存了 UE身为成员的 CSG ID列 表）判断成员状态， 当判断为"成员"时， UE在测量报告中包括 UE的成员状态（指示 为"成员"）， 当判断不是成员时， 测量报告中不包括 UE 的成员状态。 在相邻小区为
CSG小区的情况下， UE仅上报自身判断为成员的小区， 因而对于 CSG小区 UE在测 量结果中不用携带成员状态， 基站默认 UE为上报的 CSG小区的成员 （可以认为 UE 在测量报告中隐含了这一成员状态）。 测量结果中还可包括相邻小区的全球小区标识 ( Cell Global Identity,缩写为 CGI，对于 E-UTRAN来说 CGI即为 E-UTRAN Cell Global Identity, 缩写为 ECGI)。 服务基站 （在切换场景下服务基站即为源基站） 收到 UE的 测量报告后， 根据测量报告中携带的信息以及基站自有的一些信息进行切换判决。 基 站自有的一些信息可能包括 UE的成员状态辅助信息， 相邻基站的负载， 来自核心网 的切换策略信息等。如果基站决定了通过 S1切换向目标小区发起切换，则基站向 MME (移动管理实体）发送切换需要（Handover Required)消息， 该消息通过 S1接口发送， 因而也可称为 SI Handover Required消息。 如果目标小区为 CSG小区或 hybrid小区， 贝 U消息中除了携带目标小区的标识等信息以外，还需要携带目标小区的 CSG ID, 而在 目标小区为 hybrid小区时， 还需携带目标的小区接入模式 （指示为 hybrid)。 在切换需要消息中可选地包括成员状态信息，例如， 当目标小区为 hybrid小区时， 成员状态信息指示成员或非成员。 MME收到切换需要消息后， 根据消息中的 CSG ID 对 UE的成员身份进行判断。 如果 MME判断为非成员而接收到的成员状态为"成员"， 则 MME将成员状态辅助信息更新为不可信（可信度为假）、 或不可靠（可靠性为假）、 或不真实 （真实性为假）、 或非正常 UE、 或成员一致性 （membership consistency) 为 假（如果此前的成员状态辅助信息取值与此不同）。如果 MME的成员判断与接收到的 成员状态信息一致 （例如都为"成员"或都为 "非成员"）， 则 MME将成员状态辅助信息 更新为可信、 或可靠、 或真实、 或正常 UE、 或成员一致性为真（如果此前的成员状态 辅助信息取值与此不同）。 本实施例与实施例三不同之处在于 MME完成成员状态判断并在需要的情况下更 新成员状态辅助信息之后的动作。 如果目标小区为 CSG小区且 MME判断 UE为非成 员， 则 MME向源基站发送切换准备失败消息， 并在消息中包括失败的原因值。 该原 因值可以设为非成员或者成员状态错误。 源基站可以根据消息和原因值更新成员状态 辅助信息， 例如将成员状态辅助信息设为不可信（可信度为假）、 或不可靠（可靠性为 假）、或不真实（真实性为假）、或非正常 UE、或成员一致性（membership consistency) 为假（如果此前的成员状态辅助信息取值与此不同）。如果 MME在切换准备失败消息 中携带了成员状态辅助信息， 目标基站也可以直接根据该信息进行成员状态辅助信息 的更新 /保存。 实施例五 图 10是在接入流程中更新成员状态辅助信息的详细流程图， 如图 10所示， 本实 施例包括以下步骤 （步骤 S1002至步骤 S1012): 步骤 S1002、 UE与基站执行接入流程； 步骤 S 1004、 基站向 MME发送初始 UE消息， 其中包括小区的 CSG ID； 步骤 S1006、 MME根据 CSG ID判断成员状态； 步骤 S1008、 MME更新成员状态辅助信息 （如果有需要）； 步骤 S 1010、 MME向基站发送初始上下文建立请求消息； 步骤 S1012、 基站保存成员状态辅助信息以用于后续切换。 下面详细阐述本实施例的过程。 该实施例主要适用于 UE在封闭型小区接入的情况。在这种情况下， UE在接入封 闭型小区之前需要先根据其自身的白表以及小区广播的 CSG ID进行成员判断， 如何 判断是该封闭型小区的成员， 则 UE才能允许接入该小区。 接入流程大致包括以下步 骤： UE向基站发送随机接入前导码 （random access Preamble), 基站向 UE发送随机 接入响应， UE向基站发送 RRC连接建立请求消息， 基站向 UE发送 RRC连接建立消 息， UE向基站发送 RRC连接建立完成消息。 之后， 基站向 MME发送初始 UE消息 (Initial UE message), 其中携带接入小区的 CSG ID (当该消息中携带了 CSG ID而未 携带小区接入模式时， 此时 MME会把该小区视作封闭型小区）。 MME根据 CSG ID 进行成员状态判断 （对于封闭型小区也就是接入控制）。 如果 MME判断 UE为非成员，则成员状态辅助信息应设为指示该 UE不可信、或 该 UE为恶意 （非正常） UE、 或 UE与 MME的成员判断不一致， 因此如果成员状态 辅助信息原来为指示该 UE可信、 正常或者成员判断一致， 则 MME更新成员状态辅 助信息。如果 MME对 UE的成员判断为成员（说明 UE和 MME对成员的判断一致）， 则成员状态辅助信息可以设为指示该 UE可信、 正常或者成员判断一致， 如果成员状 态辅助信息原来为指示该 UE不可信、 或该 UE为恶意（非正常） UE、 或 UE与 MME 的成员判断不一致， 则 MME更新成员状态辅助信息。 以上 MME更新成员状态辅助信息的算法还可以结合计数器或者定时器等机制， 例如， 仅当判断一致的累计次数超过一定数值条件时才更新成员状态辅助信息， 而且 触发成员状态辅助信息更新的计数器对从可信变为不可信或者从不可信变为可信的条 件可以并不相同， 例如， 当从可信变为不可信只需要当前判断不一致即更新成员状态 辅助信息为不可信， 而从不可信变为可信则需要多次真实上报才能更新。 如果 MME判断 UE为非成员， 则 MME向基站发送用户上下文释放请求消息， 并在消息中包括失败的原因值。 该原因值可以设为非成员或者成员状态错误。 如果 MME判断 UE为成员， 则 MME向基站发送初始上下文建立请求消息， 该消息中携带 (更新后的） 成员状态辅助信息 （成员状态辅助信息也可通过 UE上下文修改消息携 带）， 基站保存该信息以用于后续切换。 基于同一发明构思， 本发明实施例还提供了一种成员状态辅助信息的更新装置， 设置在 MME中， 其结构示意图如图 11所示， 包括： 判断模块 1101， 设置为根据小区的封闭用户组标识判断 UE的成员状态， 其中， 小区为 UE待切换的小区或 UE接入的小区； 更新模块 1102，设置为根据判断结果更新保存的与 UE对应的成员状态辅助信息。 在一个实施例中， 优选的， 判断模块 1101还设置为接收 UE的成员状态信息； 更 新模块 1102还设置为根据成员状态信息和判断结果更新成员状态辅助信息。 在一个实施例中， 优选的， 更新模块 1102还设置为成员状态信息与判断结果不一 致时， 将成员状态辅助信息设置为预定值一。 成员状态信息与判断结果不一致， 包括以下至少之一： 成员状态信息为成员， 但 判断结果为非成员； 成员状态信息为非成员， 但判断结果为成员。 在一个实施例中， 优选的， 更新模块 1102还设置为成员状态信息与判断结果一致 时， 将成员状态辅助信息设置为预定值二。 在一个实施例中，优选的，判断模块 1101还设置为接收基站发送的成员状态信息， 其中， 成员状态信息携带在基站发送的下列任意一项消息中： 路径转换请求消息、 切 换需要消息、 初始 UE消息。 在一个实施例中， 优选的， 更新模块 1102还设置为利用下列任意一项消息将更新 后的成员状态辅助信息发送至发送成员状态信息的基站或者 UE的目标基站： 路径转 换请求确认消息、 切换请求消息、 路径转换请求失败消息以及切换准备失败消息、 初 始上下文建立请求消息。 其中， 发送成员状态信息的基站或者目标基站根据接收的成员状态辅助信息更新 发送成员状态信息的基站或者目标基站保存的与 UE对应的成员状态辅助信息； 或者 发送成员状态信息的基站或者目标基站保存与 UE对应的成员状态辅助信息。 在一个实施例中， 优选的， 更新模块 1102还设置为利用下列任意一项消息将 UE 的成员状态信息发送至发送成员状态信息的基站或者目标基站： 路径转换请求确认消 息、 切换请求消息、 路径转换请求失败消息以及切换准备失败消息、 初始上下文建立 请求消息。 其中， 发送成员状态信息的基站或者目标基站根据接收的成员状态信息更新发送 成员状态信息的基站或者目标基站保存的与 UE对应的成员状态辅助信息。 若接收的成员状态信息指示 UE为非成员， 发送成员状态信息的基站或目标基站 将成员状态辅助信息设置为预定值一。 发送成员状态信息的基站或者目标基站的基站类型包括： 家庭基站和宏基站。 在一个实施例中， 优选的， 判断模块 1101还设置为接收小区的接入模式信息； 更 新模块 1102还设置为根据接入模式信息和判断结果更新成员状态辅助信息。 在一个实施例中， 优选的， 更新模块 1102还设置为接入模式信息对应的接入模式 为封闭型， 且判断结果为非成员时， 将成员状态辅助信息设置为预定值一。 在一个实施例中， 优选的， 更新模块 1102还设置为接入模式信息对应的接入模式 为封闭型， 且判断结果为成员时， 将成员状态辅助信息设置为预定值二。 基于同一发明构思， 本发明实施例还提供了一种基站切换装置， 设置在基站中， 其结构示意图如图 12所示， 包括： 第一接收模块 1201， 设置为接收 MME更新后的成员状态辅助信息； 第一执行模块 1202， 设置为根据更新后的成员状态辅助信息执行切换判决。 基于同一发明构思， 本发明实施例还提供了另外一种基站切换装置， 设置在基站 中， 其结构示意图如图 13所示， 包括： 第二接收模块 1301， 设置为接收 MME发送的 UE的成员状态信息； 第二执行模块 1302， 设置为根据成员状态信息更新成员状态辅助信息， 并根据更 新后的成员状态辅助信息执行切换判决。 从以上的描述中， 可以看出， 本发明实现了如下技术效果： 在本发明实施例中， MME根据小区的封闭用户组标识判断 UE的成员状态， 并根 据判断结果更新保存的与 UE对应的成员状态辅助信息。 当 UE开始出现上报的成员 状态不真实的情况时， MME根据判断结果去更新成员状态辅助信息， 并不完全依赖 于 UE上报的成员状态信息， 避免出现 UE行为与成员状态辅助信息不同步的情况。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布在多个计算装置所 组成的网络上， 可选地， 它们可以用计算装置可执行的程序代码来实现， 从而， 可以 将它们存储在存储装置中由计算装置来执行， 并且在某些情况下， 可以以不同于此处 的顺序执行所示出或描述的步骤， 或者将它们分别制作成各个集成电路模块， 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样， 本发明不限制于任 何特定的硬件和软件结合。 以上仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本领域的技术人 员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内， 所作的任何 修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种成员状态辅助信息的更新方法， 包括：
移动管理实体 MME根据小区的封闭用户组标识判断用户设备 UE的成员 状态， 其中， 所述小区为所述 UE待切换的小区或所述 UE接入的小区；
所述 MME根据判断结果更新保存的与所述 UE对应的成员状态辅助信息。
2. 根据权利要求 1所述的方法， 其中， 所述 MME根据小区的封闭用户组标识判 断所述 UE的成员状态之前， 包括： 所述 MME接收所述 UE的成员状态信息； 所述 MME根据判断结果更新保存的与所述 UE对应的成员状态辅助信息， 包括： 所述 MME根据所述成员状态信息和所述判断结果更新所述成员状态辅 助信息。
3. 根据权利要求 2所述的方法， 其中， 所述 MME根据所述成员状态信息和所述 判断结果更新所述成员状态辅助信息， 包括：
所述成员状态信息与所述判断结果不一致时， 所述 MME将所述成员状态 辅助信息设置为预定值一。
4. 根据权利要求 3所述的方法，其中，所述成员状态信息与所述判断结果不一致， 包括以下至少之一： 所述成员状态信息为成员， 但所述判断结果为非成员； 所 述成员状态信息为非成员， 但所述判断结果为成员。
5. 根据权利要求 2所述的方法， 其中， 所述 MME根据所述成员状态信息和所述 判断结果更新所述成员状态辅助信息， 包括：
所述成员状态信息与所述判断结果一致时， 所述 MME将所述成员状态辅 助信息设置为预定值二。
6. 根据权利要求 2-5任一项所述的方法， 其中， 所述 MME接收所述 UE的成员 状态信息， 包括： 所述 MME接收基站发送的所述成员状态信息， 其中， 所述 成员状态信息携带在所述基站发送的下列任意一项消息中：路径转换请求消息、 切换需要消息、 初始 UE消息。
7. 根据权利要求 6所述的方法， 其中， 所述 MME根据判断结果更新保存的与所 述 UE对应的成员状态辅助信息之后， 还包括： 所述 MME利用下列任意一项 消息将更新后的成员状态辅助信息发送至发送所述成员状态信息的基站或者所 述 UE的目标基站： 路径转换请求确认消息、 切换请求消息、 路径转换请求失 败消息以及切换准备失败消息、 初始上下文建立请求消息。
8. 根据权利要求 7所述的方法， 其中， 所述 MME将更新后的成员状态辅助信息 发送至发送所述成员状态信息的基站或者所述目标基站之后， 还包括：
所述发送所述成员状态信息的基站或者所述目标基站根据接收的成员状态 辅助信息更新所述发送所述成员状态信息的基站或者所述目标基站保存的与所 述 UE对应的成员状态辅助信息； 或者
所述发送所述成员状态信息的基站或者所述目标基站保存与所述 UE对应 的成员状态辅助信息。
9. 根据权利要求 6所述的方法， 其中， 所述 MME根据判断结果更新保存的与所 述 UE对应的成员状态辅助信息之后， 还包括： 所述 MME利用下列任意一项 消息将所述 UE的成员状态信息发送至所述发送所述成员状态信息的基站或者 所述目标基站： 路径转换请求确认消息、 切换请求消息、 路径转换请求失败消 息以及切换准备失败消息、 初始上下文建立请求消息。
10. 根据权利要求 9所述的方法， 其中， 所述 MME将所述 UE的成员状态信息发 送至所述发送所述成员状态信息的基站或者所述目标基站之后， 还包括：
所述发送所述成员状态信息的基站或者所述目标基站根据接收的成员状态 信息更新所述发送所述成员状态信息的基站或者所述目标基站保存的与所述 UE对应的成员状态辅助信息。
11. 根据权利要求 10所述的方法，其中，所述发送所述成员状态信息的基站或者所 述目标基站根据接收的成员状态信息更新所述发送所述成员状态信息的基站或 者所述目标基站保存的与所述 UE对应的成员状态辅助信息， 包括：
若所述接收的成员状态信息指示所述 UE为非成员， 所述发送所述成员状 态信息的基站或目标基站将所述成员状态辅助信息设置为预定值一。
12. 根据权利要求 10所述的方法，其中，所述发送所述成员状态信息的基站或者所 述目标基站的基站类型包括： 家庭基站和宏基站。
13. 根据权利要求 1所述的方法， 其中， 所述 MME根据小区的封闭用户组标识判 断所述 UE的成员状态之前， 包括： 所述 MME接收所述小区的接入模式信息； 所述 MME根据判断结果更新保存的与所述 UE对应的成员状态辅助信息， 包括： 所述 MME根据所述接入模式信息和所述判断结果更新所述成员状态辅 助信息。
14. 根据权利要求 13所述的方法， 其中， 所述 MME根据所述接入模式信息和所述 判断结果更新所述成员状态辅助信息， 包括：
所述接入模式信息对应的接入模式为封闭型，且所述判断结果为非成员时， 所述 MME将所述成员状态辅助信息设置为预定值一。
15. 根据权利要求 13或 14所述的方法， 其中， 所述 MME根据所述接入模式信息 和所述判断结果更新所述成员状态辅助信息， 包括：
所述接入模式信息对应的接入模式为封闭型， 且所述判断结果为成员时， 所述 MME将所述成员状态辅助信息设置为预定值二。
16. 一种基站切换方法， 包括：
基站接收移动管理实体 MME更新后的成员状态辅助信息， 其中， 所述成 员状态辅助信息由所述 MME根据小区的封闭用户组标识判断用户设备 UE的 成员状态的判断结果更新；
所述基站根据所述更新后的成员状态辅助信息执行切换判决。
17. 根据权利要求 16所述的方法，其中，所述基站根据所述更新后的成员状态辅助 信息执行切换判决， 包括：
所述成员状态辅助信息为预定值一时，所述基站与待切换的基站间采用 S1 切换；
所述成员状态辅助信息为预定值二时， 所述基站与所述待切换的基站间采 用 X2切换。
18. 根据权利要求 17所述的方法， 其中， 所述基站包括： 家庭基站和宏基站。
19. 一种基站切换方法， 包括：
基站接收移动管理实体 MME发送的用户设备 UE的成员状态信息； 所述基站根据所述成员状态信息更新成员状态辅助信息， 并根据更新后的 成员状态辅助信息执行切换判决。
20. 一种成员状态辅助信息的更新装置， 设置在移动管理实体 MME中， 包括： 判断模块， 设置为根据小区的封闭用户组标识判断用户设备 UE的成员状 态， 其中， 所述小区为所述 UE待切换的小区或所述 UE接入的小区；
更新模块， 设置为根据判断结果更新保存的与所述 UE对应的成员状态辅 助信息。
21. 一种基站切换装置， 设置在基站中， 包括：
第一接收模块， 设置为接收移动管理实体 MME更新后的成员状态辅助信 息；
第一执行模块，设置为根据所述更新后的成员状态辅助信息执行切换判决。
22. 一种基站切换装置， 设置在基站中， 包括：
第二接收模块， 设置为接收移动管理实体 MME发送的用户设备 UE的成 员状态信息；
第二执行模块， 设置为根据所述成员状态信息更新成员状态辅助信息， 并 根据更新后的成员状态辅助信息执行切换判决。
PCT/CN2012/072341 2011-08-05 2012-03-14 成员状态辅助信息更新方法及装置、基站切换方法及装置 WO2012152118A1 (zh)

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