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WO2012095014A1 - 核心网设备和家庭基站及其处理lipa连接的方法 - Google Patents

核心网设备和家庭基站及其处理lipa连接的方法 Download PDF

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Publication number
WO2012095014A1
WO2012095014A1 PCT/CN2012/070291 CN2012070291W WO2012095014A1 WO 2012095014 A1 WO2012095014 A1 WO 2012095014A1 CN 2012070291 W CN2012070291 W CN 2012070291W WO 2012095014 A1 WO2012095014 A1 WO 2012095014A1
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WO
WIPO (PCT)
Prior art keywords
base station
access
home base
target base
lipa connection
Prior art date
Application number
PCT/CN2012/070291
Other languages
English (en)
French (fr)
Inventor
周燕飞
张娟
艾明
Original Assignee
大唐移动通信设备有限公司
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Filing date
Publication date
Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Publication of WO2012095014A1 publication Critical patent/WO2012095014A1/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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions

Definitions

  • LIPA Local IP Access
  • H(e)B Home (evolved)
  • NodeB (evolved) home base station) technology for accessing a local network associated with the home base station, the local network including a home network, a corporate network, and the like.
  • the terminal is specifically connected to the local network through an LGW (Local Gateway) connected to the home base station.
  • LGW Local Gateway
  • the network needs to perform access control on the terminals that access the home base station and the local network, and mainly includes the following controls:
  • the home base station access control specifically determining whether the terminal satisfies the control requirement for accessing the home base station, that is, determining whether the terminal has the right to access the network through a certain home base station;
  • Local network access control specifically determining whether the terminal satisfies the control requirement for accessing the local network, that is, determining whether the terminal has the right to request access to a specific local network such as a home network or a corporate network through a home base station, Local network access control is performed on the basis of successful home base station access control.
  • the above two steps are performed by the core network control node based on the subscription data.
  • the local gateway LGW is implemented on the same physical entity as the home base station H(e)NB, and H(e)B is connected to the H(e)B gateway through the backhaul network, and connected
  • the mobile operator's core network is connected to the PDN (Packet Date Network) through the gateway.
  • the local gateway LGW can be implemented on a different physical entity than the home base station. As shown in Figure 2, the LIPA architecture diagram of the Release l phase.
  • the 3GPP R10 version does not support the mobility of the LIPA connection.
  • the LIPA connection needs to be activated before the handover.
  • the standard scheme is to notify the local gateway before the handover by the home base station, and the local gateway initiates the connection deactivation process to release the LIPA connection.
  • the home base station notifies the core network control node before the handover, the core After the heart network control node initiates the LIPA connection deactivation, it returns a response to the home base station, and then the home base station initiates the handover process.
  • the MME Mobility Management Entity
  • the E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the terrestrial radio access network refers to the radio access node at this time, that is, the home base station.
  • the LIPA connection deactivation process triggered by the home base station in the handover includes the following steps:
  • Step S301 when the handover is about to occur, if the terminal has an LIPA connection, the home base station sends an E-UTRAN Local Connection HO Indication message indicating that the E-UTRAN Local Connection Switching Indication message is sent to the MME.
  • the handover is about to occur, and the target ID in the message indicates the identity of the handover target base station;
  • Step S302 if the LIPA connection is not the last IP connection of the terminal, the MME initiates an MME request.
  • the PDN de-connects the MME requested PDN disconnection to release the connection; otherwise, the de-attach process is initiated;
  • Step S303 after the foregoing process is completed, the MME returns an E-UTRAN Local Connection Handover E-UTRAN Local Connection HO ACK message to the home base station, indicating that the LIPA connection is released, and the handover can be performed. The home base station will then initiate a handover based on the existing process.
  • the LIPA connection in the R11 phase needs to support the mobility of the intra-LGW, that is, the LIPA connection can continue to be maintained when the terminal switches between the home base stations connected to the same LGW.
  • the prior art does not support the above mobility, and does not solve the problem of how to judge whether the LIPA connection can be maintained or how to perform corresponding processing according to the judgment result.
  • the present invention provides a core network device and a home base station and a method for processing the LIPA connection, which are used to optimize the LIPA connection process in the existing switching process, so that the continuity of the LIPA connection during the UE handover process is maintained.
  • the present invention provides a method for a core network device to process a local IP access LIPA connection, including:
  • the present invention also provides a method for a home base station to process a local IP access LIPA connection, including:
  • the present invention Upon receiving the access success message returned by the core network device, the handover related operation of the UE is started.
  • the present invention also provides a core network device for processing a local IP access LIPA connection, including: And an indication message receiving unit, configured to receive, by the source home base station, an indication message sent when the UE needs to perform handover and the LIPA connection is activated;
  • An access success indication unit configured to determine, according to the indication message, the subscription data of the UE, and the local gateway related information, that the UE can return an access success message to the source home base station when the handover is implemented while maintaining the LIPA connection, and the indication information is The source home base station starts performing handover related operations of the UE.
  • the invention also provides a home base station, comprising:
  • an indication message sending unit configured to send an indication message to the core network device when the UE needs to perform handover and the LIPA connection is activated;
  • the switching unit is configured to start performing a handover related operation of the UE when receiving an access success message returned by the core network device.
  • the core network device and the home base station provided by the present invention and the method for processing the LIPA connection have the following beneficial effects: A method for processing the LIPA connection in the R11 phase switching scenario is proposed, so that the continuity of the LIPA connection is maintained, and the present invention is Whether the core network device performs the LIPA connection decision or not, since the core network control node has the LIPA connection related information and the UE subscription information, the decision method performed by the core network device is an effective and complete method.
  • Figure 1 is an architectural diagram of an existing 3GPP Release 10 phase LIPA connection
  • Figure 2 is an architectural diagram of an existing 3GPP Release 11 phase LIPA connection
  • FIG. 3 is a LIPA connection deactivation process triggered by a home base station in handover
  • FIG. 4 is a flowchart of a method for processing a LIPA connection by a core network device according to the present invention
  • FIG. 5 is a flowchart of a method for processing a LIPA connection by a core network device according to a preferred embodiment of the present invention
  • FIG. 7 is a flowchart of a method for processing a LIPA connection by a core network device according to Embodiment 1 of the present invention.
  • FIG. 8 is a flowchart of a method for processing a LIPA connection by a core network device according to Embodiment 2 of the present invention.
  • FIG. 9 is a flowchart of a method for processing a LIPA connection by a core network device according to Embodiment 4 of the present invention.
  • FIG. 10 is a structural diagram of a core network device applied to an LTE system according to a preferred embodiment of the present invention.
  • the core network device and the method for processing the LIPA connection provided by the present invention are described in more detail below with reference to the accompanying drawings and embodiments.
  • the LIPA connection in the 3GPP Release 10 phase does not support mobility.
  • the LIPA connection needs to be activated before the handover.
  • the LIPA connection in the R11 phase can support mobility.
  • the connection can be maintained as long as certain conditions are met during handover.
  • the prior art does not propose how to handle the LIPA connection in the above scenario.
  • the present invention provides a core network device and a method for processing the LIPA connection. As shown in FIG. 4, the method includes:
  • Step S401 The receiving source source base station determines, when the UE needs to perform handover, and activates the LIPA connection, the indication message sent;
  • the LIPA connection refers to a connection of the terminal to the local gateway through the source home base station.
  • the indication message includes at least the target cell and/or the target base station information of the handover.
  • Step S402 determining, according to the indication message, the subscription data of the UE, and the local gateway information, that the UE can return an access success message to the source home base station when the handover is implemented while maintaining the LIPA connection, and instruct the source home base station to execute the The handover related operation of the UE.
  • the foregoing method provided by the present invention performs LIPA connection processing on the core network device as the core network control node according to the indication of the source home base station: For the terminal that activates the LIPA connection, the home base station sends an indication message to the core network control node before starting, the core network The control node determines whether the LIPA connection can continue to be maintained when switching to the target cell/target base station according to the indication message, the subscription data of the UE, and the local gateway information. If the LIPA connection can be maintained, the core network control node notifies the home base station to start the handover process. The continuity of the LIPA connection is maintained because the LIPA connection is not released. The present invention performs the LIPA connection decision by the core network device. Since the core network control node has the LIPA connection related information and the UE subscription information, the decision method performed by the core network device is an effective and complete method.
  • the target base station is a home base station, and the UE maintains the original LIPA connection during the handover
  • the LIPA connection is changed from being accessed by the source home base station to the local gateway, and the target home base station accessing the local gateway, specifically
  • the original LIPA connection is released after the new LIPA connection of the local gateway is established by the target home base station.
  • the specific handover and release process of the UE can use the existing process. This embodiment is no longer used.
  • the above-described flow of the present invention allows the original LIPA connection to be maintained without activating the original LIPA connection when the handover is started, thus maintaining the continuity of the LIPA connection.
  • the conditions for supporting the UE handover can be kept different for the LIPA connection. Therefore, whether the UE can perform the handover while maintaining the LIPA connection can be determined according to whether the specific scenario satisfies the determination of the set condition.
  • some parameters required for the condition determination may be carried in the indication message, or some parameters required for the condition determination may be determined in the core network device itself.
  • the LIPA connection for the R11 phase needs to support the mobility of the intra-LGW, that is, the LIPA connection can continue to be maintained when the terminal switches between the home base stations connected to the same LGW.
  • the target base station to be handed over is the home base station; the UE satisfies the access control requirement for accessing the target base station; Access to the local network requesting access Control requirements;
  • the target base station is connected to the same local gateway as the source home base station.
  • the method is applied to the LTE system.
  • the method further includes: according to the indication message, If the target base station is a macro base station, it is determined whether the LIPA connection of the UE is the last IP connection. If yes, the detach process of the UE is initiated, and the whole process ends; if not, the LIPA connection release process is initiated to release the LIPA connection of the UE. After the release succeeds, an access success message is returned to the source home base station, and the source home base station is instructed to start performing handover related operations of the UE.
  • the method is further applicable to the UMTS (Universal Mobile Telecommunications System), and further includes: when determining that the target base station is a macro base station according to the indication message, initiating a LIPA connection release process to release the LIPA connection of the UE, releasing After the success, the source home base station returns an access success message, instructing the source home base station to start performing handover related operations of the UE.
  • the process of de-attaching the UE initiated by the core network device and the process of releasing the LIPA connection use the existing process, which will not be described in detail herein.
  • the target base station is a home base station, it is required to determine whether the terminal has the right to access the network through a certain home base station, and whether the terminal has the right to access the local network requested by the target home base station and whether the target base station is connected to the source home base station. Go to the same local gateway. If these conditions are met, the UE satisfies the access control requirements and LIPA connection continuity requirements for access to the target base station. If the UE does not meet the access control requirement for accessing the target base station, the UE does not successfully access the target base station corresponding to the target cell, and the UE does not satisfy the access control requirement of the local network accessing the requested access. , indicating that the UE will not successfully access the local network.
  • the method in this embodiment further includes: determining, according to the indication message, that the target base station is a home base station, but when the UE does not meet the access control requirement for accessing the target base station, returning an indication to the source home base station The UE cannot access the access failure message of the target base station.
  • the method is applied to an LTE system.
  • the method further includes: determining, according to the indication message, that the target base station is a home base station, the UE satisfies an access control request for accessing the target base station, but the UE If the access control requirement of the local network accessing the request access is not satisfied or/and the target base station is connected to the source local base station to a different local gateway, it is determined whether the LIPA connection of the UE is the last IP connection, and if so, Initiating the detachment process of the UE; if not, initiating the LIPA connection release process to release the LIPA connection of the UE, and after the release is successful, returning an access success message to the source home base station, instructing the source home base station to start performing the handover related operation of the UE.
  • the method is further applicable to the UMTS system.
  • the method further includes: determining, according to the indication message, that the target base station is a home base station, and the UE meets an access control requirement for accessing the target base station, but the UE is not satisfied.
  • the access control request to the local network requesting access or/and the target base station is connected to the source local base station to a different local gateway, the LIPA connection release procedure is initiated to release the LIPA connection of the UE, and the release succeeds to the source.
  • the home base station returns an access success message, instructing the source home base station to start performing handover related operations of the UE.
  • the source home base station processes the existing received access failure message, which is not described in detail here.
  • the indication message includes the target cell and/or the target base station information of the handover.
  • the indication message further includes the closed user group identifier and the access mode of the target base station, and different closed users.
  • the group identifier corresponds to different user groups, and the home base station allows the user to access the user group corresponding to the user group identifier.
  • the existing home base station access mode includes only the user group in the user group corresponding to the closed user group identifier.
  • the closed access mode, the open access mode that allows all users to access, and the hybrid access mode that allows all users to access but the user group corresponding to the closed user group identifier has a high user access preference.
  • the core network device determines, according to the target cell and/or the target base station information of the handover in the indication message, whether the target base station to be switched is a home base station; and when determining that the target base station is a home base station, according to the closed user group of the target base station.
  • the identifier and the access mode are combined with the subscription data of the UE to determine whether the UE satisfies the access control requirement for accessing the target base station and the access control requirement for accessing the local network requesting access.
  • the local gateway related information is the home base station information that is connected to the local gateway, and the local gateway is previously configured on the core network device, or the local gateway information of the connected home base station is obtained by different home base stations.
  • the embodiment of the present invention further provides a method for a home base station to process a local IP access LIPA connection, including: determining that the UE needs to perform handover and has activated the LIPA connection, sending an indication message to the core network device; receiving the core network device returning When the access success message is received, the handover related operation of the UE is started.
  • the home base station determines that the UE performs handover and activates the LIPA, which is different from the behavior of directly deactivating the LIPA connection in the prior art, but is determined by the core network device whether the LIPA is deactivated, and the LIPA connection is maintained continuously. Sex.
  • the method further includes: when receiving the access failure message returned by the core network device, performing corresponding processing according to the reason for the access failure.
  • the indication message includes the target cell and/or the target base station information of the handover.
  • the indication message further includes a closed user group identifier and an access mode of the target base station.
  • the method includes:
  • the home base station sends an indication message, that is, the first message, including the identity information of the target base station, such as the base station identifier, the cell identifier, etc., to the core network device that is the core network control node before the handover occurs.
  • the target base station is a home base station, and should also include information such as a closed subscriber group identifier and an access mode of the target base station;
  • the core network device determines whether the UE can perform the handover while maintaining the LIPA connection. The judgment is divided into two steps:
  • step 4 a) basic access control, that is, determining whether the UE satisfies the access control requirement for accessing the target base station, and if so, proceeds to the next decision, otherwise proceeds to step 4;
  • LIPA connection decision determining whether the UE can implement handover while maintaining the LIPA connection, such as determining whether the UE satisfies the access control requirement of the local network accessing the requested access and whether the target base station is connected to the source home base station
  • the same local gateway if yes, go to step 4, otherwise go to step 3;
  • the LIPA connection release process is initiated, and the process proceeds according to the existing process. If the LIPA connection cannot be maintained and the connection is the last IP connection of the UE, the de-attachment process is initiated, and after the detachment is completed, the entire process is terminated. For the UMTS system, the detachment determination is not required, and the LIPA connection release process is directly initiated;
  • the core network device returns a second message to the home base station. If the basic access control fails in step 2, that is, the terminal cannot access the target base station, the second message is specifically a failure information that does not allow the UE to access the target base station; if the basic access control and the LIPA connection decision in step 2 are successful, Or the third step releases the LIPA connection and the core network device does not initiate the detach process, and the second message is specifically an access success message.
  • the source home base station After the source home base station receives the second message, if the access success information is included, the handover related operation of the UE is initiated according to the existing procedure; otherwise, the process of receiving the access failure message is processed.
  • the decision process of the core network device in this embodiment is as shown in FIG. 6, and includes:
  • Step S601 The receiving source source base station determines, when the UE needs to perform handover, and activates the LIPA connection, sends the first message, and initiates the following determination process;
  • Step S602 determines whether the target base station is a macro base station, and if so, directly proceeds to step S605, and if the target base station is a home base station, proceeds to step S603;
  • Step S603 performing basic access control, determining whether the basic access control is successful, if yes, executing step S604, otherwise performing step S608; the basic access control determining process is an existing process, and determining that the required parameters are provided by the first message, Including target base station identity, cell identity, closed subscriber group identity, access mode, etc.
  • Step S604 If the basic access control succeeds, the core network device continues to determine whether the LIPA connection can be maintained, and the core network device can determine whether the LIPA connection can be maintained by using the subscription data, configuration information, and parameters carried in the first message. If the result of the determination is yes, step S607 is performed, otherwise step S605 is performed;
  • Step S605 for the LTE system, the core network device determines whether the LIPA connection is the last IP connection of the UE, if yes, proceeds to step S609, otherwise proceeds to step S606, and for the UMTS system, performs step S606; step S606, the core network device initiates LIPA connection release process;
  • Step S607 the LIPA connection is successfully released or the LIPA connection can be maintained, and the core network control node returns a second message, where the access success message is sent, indicating that the home base station can perform the handover related operation;
  • Step S608 if the basic access control fails, the core network device returns a second message carrying the access failure information, and the access failure information is that the UE cannot access the target cell;
  • Step S609 if the LIPA connection cannot be maintained and is the last connection, the core network device initiates a detach process.
  • the operation of the home base station in this embodiment is:
  • the first message is sent to the core network device, where the target base station identifier and the cell identifier are included, and if the target cell is the home base station cell, the closed subscriber group identifier, the access mode, and the like are also included.
  • the home base station When receiving the second message with the access success information returned by the core network control node, the home base station performs the handover related operation according to the existing procedure; when receiving the access failure information with the terminal unable to access the target cell When the second message is processed, it is processed according to the existing process.
  • the terminal activates the LIPA connection in a home base station cell, and then the handover is required due to the mobile home base station of the terminal.
  • the target base station is a home base station connected to the same home gateway as the source home base station, the home base station and the source home base station have the same closed subscriber group identity, and the source and destination home base stations have an X2 interface.
  • the core network control node MME will determine that the LIPA connection can be maintained.
  • the LIPA connection processing process in this scenario is shown in Figure 7, including:
  • Step S701 The source home base station sends a first message to the MME, where the cell identifier, the base station identifier, and the closed user group identifier of the target home base station are included.
  • Step S702 The MME may determine, according to the subscription information of the UE, the information about the local gateway, and the information obtained in the previous step, that the LIPA connection may continue to be maintained when switching to the target base station, and the determining process is as follows:
  • the MME performs basic access control of the home base station, and the basic access control is successful because the target base station closed user group identity has been signed;
  • the MME determines whether the target base station is connected to the same local gateway as the source base station.
  • the MME can learn that the target base station and the source base station share the same local gateway according to the cell identifier, the base station identifier, and the local gateway that the MME has configured and the corresponding home base station information.
  • Step S703 The MME returns a second message carrying the access success information to the source home base station.
  • Step S704 the source home base station initiates a handover according to an existing procedure, and the handover is an X2 handover.
  • the terminal activates the LIPA connection in a home base station and the connection is not the only connection of the terminal, and then the home base station needs to initiate the handover due to the movement of the terminal.
  • the target base station is a macro base station, and the core SG support node SGSN (Serving GPRS Support Node) will determine that the LIPA connection cannot be maintained.
  • the LIPA connection processing process in this scenario is shown in Figure 8.
  • Step S801 The home base station sends a first message to the core network device SGSN, where the related identifier of the target base station, such as a cell identifier, is included.
  • Step S802 the SGSN knows that the target cell is a macro base station according to the first message, and therefore determines that the LIPA connection cannot be maintained;
  • Step S803 the SGSN initiates a packet data protocol content PDP Context release process according to an existing process to release
  • Step S804 after the LIPA connection is released, the SGSN returns a second message carrying the access success information to the home base station.
  • Step S805 the home base station initiates a handover according to an existing procedure, and the handover is an S1 handover.
  • the handover target cell is a home base station cell that the terminal does not subscribe to, and there is no X2 interface between the source and target cells.
  • the operation of the core network device as the core network control node at this time is as follows:
  • the basic access control fails, and the core network control node returns a second message carrying the access failure information to the source home base station.
  • the source home base station After receiving the second message, the source home base station operates according to the prior art, such as selecting another target cell for the terminal.
  • the terminal activates the LIPA connection in a home base station cell, and then the handover is required due to the mobile home base station of the terminal. It is assumed that the target home base station cell is the home base station cell subscribed by the terminal, but is connected to the source local base station to different local gateways.
  • the core network control node MME will determine that the LIPA connection cannot be maintained.
  • the LIPA connection processing process in this scenario is shown in Figure 9, including:
  • Step S901 The source home base station sends a first message to the MME, where the cell identifier, the base station identifier, the closed user group identifier, and the like of the target home base station are included.
  • Step S902 The MME can determine, according to the subscription information of the UE, the information about the local gateway, and the information obtained in the previous step, that the LIPA connection cannot be maintained when switching to the target base station, and the determining process is as follows:
  • the MME performs basic access control of the home base station, and the basic access control is successful because the target base station closed user group identity has been signed;
  • the MME determines whether the target base station is connected to the same local gateway as the source base station.
  • the MME can learn that the target base station and the source base station are connected to different local gateways according to the base station identifier and the cell identifier in the first message, and the local gateway that the MME has configured and the corresponding home base station information.
  • Step S903 the MME initiates release of the LIPA connection.
  • Step S904 The MME returns a second message carrying the access success information to the source home base station.
  • Step S905 The source home base station starts to switch related operations according to an existing process.
  • the embodiment of the present invention further provides a core network device for processing a local IP access LIPA connection.
  • the method includes: an indication message receiving unit 101, configured to receive a source home base station, determine that the UE needs to perform handover, and activates the LIPA connection.
  • the received success indication unit 102 is configured to determine, according to the indication message, the subscription data of the UE, and the local gateway related information, that the UE can implement the handover when the LIPA connection is maintained, to the source family.
  • the base station returns an access success message, instructing the source home base station to start performing handover related operations of the UE.
  • the access success indication unit 102 is specifically configured to determine that the UE can implement the handover while maintaining the LIPA connection when the following conditions are met: the target base station of the handover is a home base station; the UE satisfies the access to the The access control requirement of the target base station; the UE satisfies the access control requirement of the local network accessing the requested access; the target base station is connected to the same local gateway as the source home base station.
  • the core network device is applied to the LTE system, as shown in FIG. 10 is a structural diagram of the core network device applied to the LTE system, and the first detaching unit 103 is configured to determine the target base station according to the indication message.
  • the first connection release and indication unit 104 is configured to determine the UE according to the determination of the first detachment unit.
  • the LIPA connection is not the last IP connection.
  • the LIPA connection release process is initiated to release the LIPA connection of the UE.
  • the core network device is further applicable to the UMTS system, and further includes: a second connection release and indication unit, configured to: when determining that the target base station is a macro base station according to the indication message, initiate an LIPA connection release process to release the LIPA of the UE After the connection is successfully released, an access success message is returned to the source home base station, and the source home base station is instructed to start performing handover related operations of the UE.
  • the core network device further includes: an access failure indication unit 105, configured to determine, according to the indication message, that the target base station is a home base station, but the UE does not meet the access control requirement for accessing the target base station, The home base station returns an access failure message indicating that the UE cannot access the target base station.
  • an access failure indication unit 105 configured to determine, according to the indication message, that the target base station is a home base station, but the UE does not meet the access control requirement for accessing the target base station, The home base station returns an access failure message indicating that the UE cannot access the target base station.
  • the core network device is applied to the LTE system, and further includes: a second detaching unit 106, configured to determine the target base station as a home base station, and the UE meets access control of the target base station Requirement, but the UE does not satisfy the access control requirement of the local network that accesses the request access or/and the target base station is connected to the source local base station to a different local gateway, and determines whether the LIPA connection of the UE is the last IP connection.
  • a second detaching unit 106 configured to determine the target base station as a home base station, and the UE meets access control of the target base station Requirement, but the UE does not satisfy the access control requirement of the local network that accesses the request access or/and the target base station is connected to the source local base station to a different local gateway, and determines whether the LIPA connection of the UE is the last IP connection.
  • the third connection release and indication unit 107 is configured to: according to the judgment of the second detachment unit, determine that the LIPA connection of the UE is not the last IP connection, initiate a LIPA connection release process to release After the LIPA connection of the UE is successfully released, an access success message is returned to the source home base station, and the source home base station is instructed to start performing the handover related operation of the UE.
  • the core network device is further applicable to the UMTS system, and further includes: a fourth connection release and indication unit, determining, according to the indication message, that the target base station is a home base station, and the UE satisfies an access control requirement for accessing the target base station If the UE does not satisfy the access control requirement of the local network that accesses the request for access or/and the target base station is connected to the source local base station to a different local gateway, initiate a LIPA connection release process to release the LIPA connection of the UE. After the release succeeds, an access success message is returned to the source home base station, and the source home base station is instructed to start performing handover related operations of the UE.
  • a fourth connection release and indication unit determining, according to the indication message, that the target base station is a home base station, and the UE satisfies an access control requirement for accessing the target base station If the UE does not satisfy the access control requirement of the local network that accesses the request for access or/and the target base station is connected
  • the indication message includes the target cell and/or the target base station information of the handover, and when the target base station is the home base station, the indication message further includes a closed user group identifier and an access mode of the target base station;
  • the access success indication unit, the first detachment unit, the second connection release and indication unit, the access failure indication unit, the second detachment unit, and the fourth connection release and indication unit are specifically configured to use the target cell according to the handover And/or the target base station information determines whether the target base station for handover is a home base station;
  • the attaching unit and the fourth connection release and indication unit are specifically configured to determine, according to the closed subscriber group identifier and the access mode of the target base station, whether the UE satisfies the access control requirement and access to the target base station according to the subscription data of the UE. Access control requirements to the local network requesting access.
  • the embodiment further provides a home base station, including: an indication message sending unit, configured to: when the UE needs to perform handover and activates the LIPA connection, send an indication message to the core network device; and the switching unit is configured to receive the core network When the device returns an access success message, the handover related operation of the UE is started.
  • an indication message sending unit configured to: when the UE needs to perform handover and activates the LIPA connection, send an indication message to the core network device
  • the switching unit is configured to receive the core network When the device returns an access success message, the handover related operation of the UE is started.
  • the home base station further includes: a failure processing unit, configured to perform corresponding processing according to the reason for the access failure when receiving the access failure message returned by the core network device.
  • a failure processing unit configured to perform corresponding processing according to the reason for the access failure when receiving the access failure message returned by the core network device.
  • the indication message sent by the indication message sending unit includes the target cell and/or the target base station information of the handover.
  • the indication message further includes the closed user group identifier and the access of the target base station. mode.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Description

核心网设备和家庭基站及其处理 LIPA连接的方法 本申请要求在 2011年 1月 14日提交中国专利局、申请号为 201110008492.5、发明名称为"核 心网设备和家庭基站及其处理 LIPA连接的方法"的中国专利申请的优先权， 其全部内容通过引 用结合在本申请中。 技术领域 本发明涉及无线通信技术领域， 尤其涉及一种在切换场景下核心网设备和家庭基站及 其处理 LIP A连接的方法。 背景技术 LIPA ( Local IP Access, 本地 IP接入）是一种允许终端通过 H(e) B ( Home (evolved)
NodeB, (演进的）家庭基站）接入到与该家庭基站关联的本地网络的技术， 本地网络包括 家庭网络、 企业网络等。 终端具体是通过与家庭基站连接的 LGW ( Local Gateway, 本地 网关）接入到本地网络。
由于家庭基站和本地网络的接入受限特性， （如家庭网络只允许家庭成员接入）， 网络 需要对接入家庭基站和本地网络的终端进行接入控制， 主要包括如下控制：
1 ) 家庭基站接入控制， 具体为判断终端是否满足接入到家庭基站的控制要求， 也即 判断终端是否有权限通过某个家庭基站接入网络；
2 )本地网络接入控制， 具体为判断终端是否满足接入到本地网络的控制要求， 也即 判断终端是否有权限通过某个家庭基站请求接入特定的本地网络如家庭网络或企业网络 等， 本地网络接入控制在家庭基站接入控制成功的基础上进行。
上述两步操作都由核心网控制节点基于签约数据进行。
在 3GPP Release 10阶段， 如图 1所示， 本地网关 LGW与家庭基站 H(e)NB在同一个 物理实体上实现， H(e) B通过回程网络连接到 H(e) B网关，并接入移动运营商核心网络， 移动运营商核心网络通过网关与 PDN ( Packet Date Network, 分组数据网 )连接。
在 Release 10之后本地网关 LGW可以与家庭基站在不同物理实体上实现。 如图 2所 示为 Releasel l阶段的 LIPA架构图。
3GPP R10版本不支持 LIPA连接的移动性， 当终端移出激活 LIPA连接所在的家庭基 站小区时需在切换前去激活 LIPA连接。 在如何去激活 LIPA连接的问题上， 标准釆用的方 案是由家庭基站在切换前通知本地网关， 由本地网关发起连接去激活过程释放 LIPA连接。
此外， 其中一种没有进入标准的方案是由家庭基站在切换前通知核心网控制节点， 核 心网控制节点发起 LIPA连接去激活后向家庭基站返回响应， 随后家庭基站再发起切换过 程。 在 LTE系统中， 上述方案如图 3所示， 其中 MME ( Mobility Management Entity, 移 动性管理实体）是1^£系统中的核心网控制节点， E-UTRAN ( Evolved Universal Terrestrial Radio Access Network,演进通用陆地无线接入网）指代此时的无线接入节点也即家庭基站。 如图 3所示为切换中家庭基站触发的 LIPA连接去激活过程， 具体包括以下步骤：
步骤 S301 , 切换即将发生时， 如果终端已有 LIPA连接， 则家庭基站向 MME发送一 个指示 E-UTRAN本地连接切换指示 E-UTRAN Local Connection HO Indication ( E-UTRAN 本地连接切换指示）消息表明此时即将发生切换， 消息中的目标标识 Target ID表明切换目 标基站的标识；
步骤 S302, 如果该 LIPA连接不是终端的最后一个 IP连接， 则 MME发起 MME请求
PDN去连接 MME requested PDN disconnection ( MME请求的 PDN去连接）过程释放该连 接； 否则发起去附着过程；
步骤 S303 , 上述过程执行完毕后， MME向家庭基站返回 E-UTRAN本地连接切换应 答 E-UTRAN Local Connection HO ACK ( E-UTRAN本地连接切换应答） 消息， 表示 LIPA 连接已释放， 可以进行切换。 随后家庭基站将根据现有过程发起切换。
根据 3GPP需求， R11阶段的 LIPA连接需要支持 intra-LGW的移动性， 也即当终端在 连接到同一个 LGW的家庭基站之间切换时 LIPA连接能继续保持。现有技术不支持上述移 动性， 没有解决如何判断 LIPA连接能否保持， 以及如何根据判断结果进行相应处理的问 题。 发明内容 本发明提供一种核心网设备和家庭基站及其处理 LIPA连接的方法， 用以优化现有切 换过程中的 LIPA连接处理， 使得 UE切换过程中 LIPA连接的连续性得以保持。
本发明提供一种核心网设备处理本地 IP接入 LIPA连接的方法， 包括：
接收源家庭基站确定 UE需进行切换且已激活 LIPA连接时， 所发送的指示消息； 根据所述指示消息、 UE的签约数据和本地网关相关信息， 确定 UE能够在保持 LIPA 连接的情况下实现切换时， 向源家庭基站返回接入成功消息， 指示所述源家庭基站开始执 行所述 UE的切换相关操作。
本发明还提供一种家庭基站处理本地 IP接入 LIPA连接的方法， 包括：
确定 UE需进行切换且已激活 LIPA连接时， 向核心网设备发送指示消息；
接收到所述核心网设备返回的接入成功消息时， 开始执行所述 UE的切换相关操作。 本发明还提供一种处理本地 IP接入 LIPA连接的核心网设备， 包括： 指示消息接收单元， 用于接收源家庭基站确定 UE需进行切换且已激活 LIPA连接时， 所发送的指示消息；
接入成功指示单元， 用于根据所述指示消息、 UE 的签约数据和本地网关相关信息， 确定 UE能够在保持 LIPA连接的情况下实现切换时， 向源家庭基站返回接入成功消息，指 示所述源家庭基站开始执行 UE的切换相关操作。
本发明还提供一种家庭基站， 包括：
指示消息发送单元，用于确定 UE需进行切换且已激活 LIPA连接时， 向核心网设备发 送指示消息；
切换单元， 用于接收到所述核心网设备返回的接入成功消息时， 开始执行所述 UE的 切换相关操作。
利用本发明提供的核心网设备和家庭基站及其处理 LIPA连接的方法， 具有以下有益 效果： 提出了一种 R11阶段切换场景下 LIPA连接的处理方法，使得 LIPA连接的连续性得 以保持，本发明由核心网设备进行是否保持 LIPA连接判决，由于核心网控制节点具有 LIPA 连接相关的信息以及 UE的签约信息， 因此由核心网设备执行的判决方法是一种有效的、 完备的方法。 附图说明
图 1为现有 3GPP Release 10阶段 LIPA连接的架构图；
图 2为现有 3GPP Release 11阶段 LIPA连接的架构图；
图 3为切换中家庭基站触发的 LIPA连接去激活过程；
图 4为本发明提供的核心网设备处理 LIPA连接的方法流程图；
图 5为本发明优选实施例中核心网设备处理 LIPA连接的方法流程图；
图 6为本发明优选实施例中核心网设备的判决过程；
图 7为本发明实施例 1中核心网设备处理 LIPA连接的方法流程图；
图 8为本发明实施例 2中核心网设备处理 LIPA连接的方法流程图；
图 9为本发明实施例 4中核心网设备处理 LIPA连接的方法流程图；
图 10为本发明优选实施例中核心网设备应用到 LTE系统时的结构图 具体实施方式 下面结合附图和实施例对本发明提供的核心网设备及其处理 LIPA连接的方法进行更 详细地说明。 3 GPP Release 10阶段的 LIPA连接不支持移动性， 切换前需要先去激活 LIPA连接； 而 R11 阶段的 LIPA连接可以支持移动性， 切换时只要满足一定条件即可以保持该连接。 现 有技术没有提出上述场景下 LIPA连接如何处理， 本发明提出一种核心网设备及其处理 LIPA连接的方法， 如图 4所示， 包括：
步骤 S401 , 接收源家庭基站确定 UE需进行切换且已激活 LIPA连接时， 所发送的指 示消息；
对于激活 LIPA连接的终端，上述 LIPA连接指终端通过源家庭基站接入到本地网关的 连接。 上述指示消息至少包括切换的目标小区和 /或目标基站信息。
步骤 S402, 根据所述指示消息、 UE的签约数据及本地网关信息， 确定 UE能够在保 持 LIPA连接的情况下实现切换时， 向源家庭基站返回接入成功消息， 指示所述源家庭基 站执行所述 UE的切换相关操作。
本发明提供的上述方法， 基于源家庭基站指示， 作为核心网控制节点的核心网设备进 行 LIPA连接处理： 对于激活 LIPA连接的终端， 家庭基站在开始前向核心网控制节点发送 指示消息， 核心网控制节点根据指示消息、 UE的签约数据及本地网关信息， 判断 LIPA连 接是否能在向目标小区 /目标基站切换时继续保持， 如果 LIPA连接可以保持， 则核心网控 制节点通知家庭基站开始切换过程 , 由于没有释放 LIPA连接 , 因此使得 LIPA连接的连续 性得以保持。 本发明由核心网设备进行是否保持 LIPA连接判决， 由于核心网控制节点具 有 LIPA连接相关的信息以及 UE的签约信息，因此由核心网设备执行的判决方法是一种有 效的、 完备的方法。
对于目标基站为家庭基站，且 UE在切换时保持原 LIPA连接的情况， UE完成切换时， 其 LIPA连接会由通过源家庭基站接入本地网关改变为由目标家庭基站接入本地网关， 具 体何时完成该连接的改变， 优选地， 在建立由目标家庭基站接入本地网关的新 LIPA连接 后再释放原 LIPA连接， UE的具体切换及释放过程可以釆用现有流程，本实施例不再详述， 本发明的上述流程使得开始进行切换时还保持原来的 LIPA连接而没有去激活原 LIPA连 接， 因而会保持 LIPA连接的连续性。
不同场景下对支持 UE切换可以保持 LIPA连接需满足的条件不同， 因此，可以根据具 体场景对是否满足设定条件的判断，来确定是否 UE是否能够在保持 LIPA连接的情况下实 现切换。 为了支持是否满足设定条件的判断， 可以在指示消息中携带条件判断所需的一些 参数， 或在核心网设备本身配置条件判断所需的一些参数。
对于 Rl 1阶段的 LIPA连接需要支持 intra-LGW的移动性， 也即当终端在连接到同一 个 LGW的家庭基站之间切换时 LIPA连接能继续保持。优选地，本实施例中确定同时满足 如下条件时，确定 UE能够在保持 LIPA连接的情况下实现切换：切换的目标基站为家庭基 站； UE满足接入到目标基站的接入控制要求； UE满足接入到请求接入的本地网络的接入 控制要求； 目标基站为与源家庭基站连接到同一本地网关。
UE如果切换到宏基站， 说明已不具备接入到本地网络的条件， 因此需要释放 LIPA连 接， 优选地， 该方法应用于 LTE系统， 本实施例中该方法还包括： 根据所述指示消息， 确 定目标基站为宏基站时， 判断 UE的 LIPA连接是否为最后一个 IP连接， 若是， 则发起 UE 的去附着过程，整个过程结束； 若否， 则发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源家庭基站返回接入成功消息， 指示所述源家庭基站开始执行 UE的切换相 关操作。 该方法还可以应用于 UMTS ( Universal Mobile Telecommunications System, 通用 移动通信系统）， 还包括： 根据所述指示消息， 确定目标基站为宏基站时， 则发起 LIPA连 接释放过程来释放 UE的 LIPA连接，释放成功后向源家庭基站返回接入成功消息，指示所 述源家庭基站开始执行 UE的切换相关操作。 上述由核心网设备发起的 UE的去附着过程 及释放 LIPA连接的过程釆用现有流程， 这里不再详述。
如果目标基站是家庭基站， 需要判断终端是否有权限通过某个家庭基站接入网络， 及 终端是否有权限通过该目标家庭基站接入所请求接入的本地网络以及目标基站与源家庭 基站是否连接到同一本地网关。 如果这些条件都满足， UE 满足接入到所述目标基站的接 入控制要求和 LIPA连接连续要求。在 UE不满足接入到所述目标基站的接入控制要求，说 明 UE不会成功接入到目标小区对应的目标基站， 在 UE不满足接入到请求接入的本地网 络的接入控制要求， 说明 UE不会成功接入到本地网络。 优选地， 本实施例中该方法还包 括： 根据所述指示消息， 确定目标基站为家庭基站时， 但 UE不满足接入到所述目标基站 的接入控制要求时， 向源家庭基站返回指示 UE不能接入目标基站的接入失败消息。
优选地， 该方法应用于 LTE系统， 本实施例中该方法还包括： 根据所述指示消息， 确 定目标基站为家庭基站时， UE满足接入到所述目标基站的接入控制要求，但 UE不满足接 入到请求接入的本地网络的接入控制要求或 /和所述目标基站为与源家庭基站连接到不同 本地网关时， 判断 UE的 LIPA连接是否为最后一个 IP连接， 若是， 则发起 UE的去附着 过程； 若否， 则发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源家庭基 站返回接入成功消息， 指示所述源家庭基站开始执行 UE的切换相关操作。 该方法还可以 应用于 UMTS系统， 本实施例中该方法还包括： 根据所述指示消息， 确定目标基站为家庭 基站， UE满足接入到所述目标基站的接入控制要求，但 UE不满足接入到请求接入的本地 网络的接入控制要求或 /和所述目标基站为与源家庭基站连接到不同本地网关时， 发起 LIPA连接释放过程来释放 UE的 LIPA连接，释放成功后向源家庭基站返回接入成功消息， 指示所述源家庭基站开始执行 UE的切换相关操作。 源家庭基站收到该接入失败消息后按 现有收到接入失败消息的流程处理， 这里不再详述。
优选地， 本实施例中指示消息中包括切换的目标小区和 /或目标基站信息， 在目标基站 为家庭基站时， 指示消息还包括目标基站的闭合用户群标识及接入模式， 不同的闭合用户 群标识对应不同的用户群， 家庭基站允许其闭合用户群标识所对应的用户群内用户接入， 现有的家庭基站接入模式包括只允许其闭合用户群标识所对应的用户群内用户接入的闭 合接入方式、 允许所有用户接入的开放接入方式、 及允许所有用户接入但其闭合用户群标 识所对应的用户群内用户接入优选级高的混合接入方式。
优选地，本实施例中核心网设备根据指示消息中的切换的目标小区和 /或目标基站信息 确定切换的目标基站是否为家庭基站； 确定目标基站为家庭基站时， 根据目标基站的闭合 用户群标识及接入模式， 结合 UE的签约数据确定 UE是否满足接入到目标基站的接入控 制要求和接入到请求接入的本地网络的接入控制要求。 所述本地网关相关信息为不同本地 网关所连接的家庭基站信息， 所述本地网关相关事先配置在所述核心网设备上， 或通过不 同家庭基站将其连接的本地网关信息的上报获得。
本发明实施例还提供一种家庭基站处理本地 IP接入 LIPA连接的方法， 包括： 确定 UE需进行切换且已激活 LIPA连接时， 向核心网设备发送指示消息； 接收到所述核心网设 备返回的接入成功消息时， 开始执行所述 UE的切换相关操作。
本发明提供的方法中， 家庭基站在确定 UE进行切换且激活 LIPA, 不同于现有技术中 直接去激活 LIPA连接的行为， 而是由核心网设备决策是否 LIPA去激活， 保持了 LIPA连 接的连续性。
优选地， 还包括： 接收到所述核心网设备返回的接入失败消息时， 根据接入失败原因 进行相应处理。 所述指示消息中包括切换的目标小区和 /或目标基站信息， 在所述目标基站 为家庭基站时， 所述指示消息还包括目标基站的闭合用户群标识及接入模式。
依照本发明优选实施例中， 如图 5所示， 包括：
1、 对于激活了 LIPA连接的终端， 家庭基站在切换发生之前向作为核心网控制节点的 核心网设备发送指示消息即第一消息， 其中包含目标基站的标识信息如基站标识、 小区标 识等， 如果目标基站为家庭基站，还应包含目标基站的闭合用户群标识、接入模式等信息；
2、 在目标基站为家庭基站时， 核心网设备判断 UE是否能够在保持 LIPA连接的情况 下实现切换， 判断分为两步：
a )基本接入控制， 即判断 UE是否满足接入到目标基站的接入控制要求， 如果是， 则 进入下一步判决， 否则进入第 4步；
b ) LIPA连接判决， 判断 UE是否能够在保持 LIPA连接的情况下实现切换， 如判断 UE是否满足接入到请求接入的本地网络的接入控制要求及目标基站为与源家庭基站是否 连接到同一本地网关， 如果是， 则进入第 4步， 否则进入第 3步；
3、 对于 LTE系统， 如果核心网设备判断 LIPA连接不能保持且该连接不是 UE的最后 一个 IP连接， 则发起 LIPA连接释放过程， 该过程按现有流程进行。 如果 LIPA连接不能 保持且该连接是 UE的最后一个 IP连接， 则发起去附着过程， 去附着完成后， 整个过程结 束； 对于 UMTS系统， 则不需要进行去附着判断， 直接发起 LIPA连接释放过程；
4、 核心网设备向家庭基站返回第二消息。 如果第 2 步基本接入控制失败， 也即终端 不能接入目标基站， 则第二消息具体为不允许 UE接入目标基站的失败信息； 如果第 2步 基本接入控制及 LIPA连接判决成功，或第 3步释放了 LIPA连接且核心网设备没有发起去 附着过程， 则第二消息具体为接入成功消息。
5、 源家庭基站收到第二消息后， 如果其中包括接入成功信息， 则按照现有过程发起 UE的切换相关操作； 否则按照现有收到上述接入失败消息的过程处理。
本实施例中核心网设备的判决过程如图 6所示， 包括：
步骤 S601 , 接收源家庭基站确定 UE需进行切换且已激活 LIPA连接时， 所发送的第 一消息， 并启动如下判决过程；
步骤 S602判断目标基站是否为宏基站， 如果是， 则直接执行步骤 S605 , 若果目标基 站是家庭基站， 则进入步骤 S603;
步骤 S603 , 进行基本接入控制， 判断基本接入控制是否成功， 如果成功则执行步骤 S604, 否则执行步骤 S608; 基本接入控制判断过程是现有过程， 判断所需参数由第一消息 提供， 包括目标基站标识、 小区标识、 闭合用户群标识、 接入模式等；
步骤 S604, 如果基本接入控制成功， 核心网设备继续判断 LIPA连接是否能保持， 核 心网设备可以通过 UE的签约数据、配置信息和第一消息中携带的参数判断 LIPA连接能否 保持。 如果判断结果为是， 则执行步骤 S607, 否则执行步骤 S605;
步骤 S605 , 对于 LTE系统， 核心网设备判断该 LIPA连接是否为 UE的最后一个 IP 连接， 如果是， 进入步骤 S609, 否则进入步骤 S606, 对于 UMTS系统， 执行步骤 S606; 步骤 S606 , 核心网设备发起 LIPA连接释放过程；
步骤 S607, LIPA连接释放成功或 LIPA连接可以继续保持， 则核心网控制节点返回第 二消息， 其中携带接入成功消息， 表明家庭基站可以执行切换相关操作；
步骤 S608,如果基本接入控制失败，则核心网设备返回携带接入失败信息的第二消息， 接入失败信息为 UE不能接入目标小区；
步骤 S609,如果 LIPA连接不能保持且是最后一个连接，核心网设备发起去附着过程。 本实施例中家庭基站的操作为：
当检测到需要发生切换且终端有 LIPA连接时， 向核心网设备发送第一消息， 其中包 括目标基站标识、 小区标识， 如果目标小区是家庭基站小区还包括闭合用户群标识、 接入 模式等。
当收到核心网控制节点返回的带有接入成功信息的第二消息时， 家庭基站按现有过程 执行切换相关操作； 当收到带有终端不能接入目标小区的接入失败信息的第二消息时， 按 现有过程处理。 下面结合具体应用场景给出本发明核心网设备及其处理 LIPA连接的方法的几个具体 实施例。
实施例 1
LTE系统中， 终端在一个家庭基站小区中激活了 LIPA连接， 随后由于终端的移动家 庭基站需要发起切换。 设此时目标基站为与源家庭基站连接到同一个本地网关的家庭基 站，该家庭基站与源家庭基站具有相同的闭合用户群标识，且源与目标家庭基站之间有 X2 接口。 核心网控制节点 MME将判断出 LIPA连接可保持。 该场景下 LIPA连接处理过程如 图 7所示， 包括：
步骤 S701 , 源家庭基站向 MME发送第一消息， 其中包含目标家庭基站的小区标识、 基站标识及闭合用户群标识等；
步骤 S702, MME根据 UE的签约信息、 本地网关相关信息以及上一步获得的信息可 判断 LIPA连接可以在向目标基站切换时继续保持， 判断过程如下：
a ) MME进行家庭基站基本接入控制， 由于目标基站闭合用户群标识已签约， 基本接 入控制成功；
b ) MME确定 UE满足接入到请求接入的本地网络接入控制要求时， MME判断目标 基站是否与源基站连接到同一个本地网关。 根据第一消息中的小区标识、 基站标识， 以及 MME已经配置的本地网关及其对应的家庭基站信息， MME可以获知目标基站与源基站共 用同一个本地网关。
步骤 S703 , MME向源家庭基站返回携带接入成功信息的第二消息；
步骤 S704, 源家庭基站按照现有过程发起切换， 该切换是一个 X2切换。
实施例 2
UMTS 系统中， 终端在一个家庭基站中激活了 LIPA连接且该连接不是终端的唯一连 接， 随后由于终端的移动， 家庭基站需要发起切换。 设此时目标基站为宏基站， 核心网控 制节点 SGSN ( Serving GPRS Support Node, 服务 GPRS支持节点）将判断出 LIPA连接不 能保持。 该场景下 LIPA连接处理过程如图 8所示。
步骤 S801 , 家庭基站向核心网设备 SGSN发送第一消息，其中包括了目标基站的相关 标识如小区标识等；
步骤 S802, SGSN根据第一消息可知目标小区为宏基站， 因此判断 LIPA连接不能保 持；
步骤 S803 , SGSN根据现有流程发起分组数据协议内容 PDP Context释放过程以释放
LIPA连接；
步骤 S804, LIPA连接释放完成后 SGSN向家庭基站返回携带接入成功信息的第二消 息； 步骤 S805 , 家庭基站根据现有过程发起切换， 该切换为 S1切换。
实施例 3
与实施例 1区别在于， 切换目标小区为终端没有签约的家庭基站小区， 且源、 目标小 区之间没有 X2接口。 此时作为核心网控制节点的核心网设备的操作如下：
1 ) 收到第一消息， 由于目标小区是家庭基站小区， 将执行基本接入控制过程；
2 ) 由于终端没有签约目标家庭基站小区， 基本接入控制失败， 核心网控制节点向源 家庭基站返回携带接入失败信息的第二消息。
源家庭基站收到上述第二消息后， 按照现有技术进行操作， 如为终端选择其它目标小区。
实施例 4
LTE系统中， 终端在一个家庭基站小区中激活了 LIPA连接， 随后由于终端的移动家 庭基站需要发起切换。 设此时目标家庭基站小区为终端签约的家庭基站小区， 但与源家庭 基站连接到不同本地网关。 核心网控制节点 MME将判断出 LIPA连接不能保持。 该场景 下 LIPA连接处理过程如图 9所示， 包括：
步骤 S901 , 源家庭基站向 MME发送第一消息， 其中包含目标家庭基站的小区标识、 基站标识、 闭合用户群标识等；
步骤 S902, MME根据 UE的签约信息、 本地网关相关信息以及上一步获得的信息可 判断 LIPA连接不能在向目标基站切换时继续保持， 判断过程如下：
a ) MME进行家庭基站基本接入控制， 由于目标基站闭合用户群标识已签约， 基本接 入控制成功；
b ) MME确定 UE满足接入到请求接入的本地网络接入控制要求时， MME判断目标 基站是否与源基站连接到同一个本地网关。 根据第一消息中的基站标识、 小区标识， 以及 MME已经配置的本地网关及其对应的家庭基站信息， MME可以获知目标基站与源基站连 接到不同本地网关。
步骤 S903 , MME发起 LIPA连接释放。
步骤 S904 , MME向源家庭基站返回携带接入成功信息的第二消息；
步骤 S905 , 源家庭基站按照现有过程开始切换相关操作。
本发明实施例还提供一种处理本地 IP接入 LIPA连接的核心网设备， 如图 10所示， 包括： 指示消息接收单元 101 , 用于接收源家庭基站确定 UE需进行切换且已激活 LIPA连 接时， 所发送的指示消息； 接入成功指示单元 102, 用于根据所述指示消息、 UE的签约数 据和本地网关相关信息，确定 UE能够在保持 LIPA连接的情况下实现切换时， 向源家庭基 站返回接入成功消息， 指示所述源家庭基站开始执行所述 UE的切换相关操作。
优选地， 所述接入成功指示单元 102具体用于确定同时满足如下条件时， 确定 UE能 够在保持 LIPA连接的情况下实现切换： 切换的目标基站为家庭基站； UE满足接入到所述 目标基站的接入控制要求； UE 满足接入到请求接入的本地网络的接入控制要求； 目标基 站为与源家庭基站连接到同一本地网关。
优选地， 核心网设备应用于 LTE系统， 如图 10为本实施例核心网设备应用到 LTE系 统的结构图， 还包括： 第一去附着单元 103 , 用于根据所述指示消息， 确定目标基站为宏 基站时， 判断 UE的 LIPA连接是否为最后一个 IP连接， 若是， 则发起 UE的去附着过程； 第一连接释放及指示单元 104, 用于根据第一去附着单元的判断， 确定 UE的 LIPA连接不 是最后一个 IP连接， 发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源 家庭基站返回接入成功消息， 指示所述源家庭基站开始执行所述 UE的切换相关操作。 所 述核心网设备还可以应用于 UMTS系统， 还包括： 第二连接释放及指示单元， 用于根据所 述指示消息， 确定目标基站为宏基站时， 则发起 LIPA连接释放过程来释放 UE的 LIPA连 接， 释放成功后向源家庭基站返回接入成功消息， 指示所述源家庭基站开始执行 UE的切 换相关操作。
优选地， 核心网设备还包括： 接入失败指示单元 105 , 用于根据所述指示消息， 确定 目标基站为家庭基站时， 但 UE不满足接入到目标基站的接入控制要求时， 向源家庭基站 返回指示 UE不能接入目标基站的接入失败消息。
优选地， 核心网设备应用于 LTE系统， 还包括： 第二去附着单元 106 , 用于才 居所述 指示消息， 确定目标基站为家庭基站， UE 满足接入到所述目标基站的接入控制要求， 但 UE不满足接入到请求接入的本地网络的接入控制要求或 /和所述目标基站为与源家庭基站 连接到不同本地网关时， 判断 UE的 LIPA连接是否为最后一个 IP连接， 若是， 则发起 UE 的去附着过程； 第三连接释放及指示单元 107, 用于根据第二去附着单元的判断， 确定 UE 的 LIPA连接不是最后一个 IP连接时， 发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源家庭基站返回接入成功消息， 指示所述源家庭基站开始执行所述 UE的切 换相关操作。 所述核心网设备还可以应用于 UMTS系统， 还包括： 第四连接释放及指示单 元， 根据所述指示消息， 确定目标基站为家庭基站， UE 满足接入到所述目标基站的接入 控制要求， 但 UE不满足接入到请求接入的本地网络的接入控制要求或 /和所述目标基站为 与源家庭基站连接到不同本地网关时， 发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源家庭基站返回接入成功消息， 指示所述源家庭基站开始执行 UE的切换相 关操作。
优选地， 所述指示消息中包括切换的目标小区和 /或目标基站信息， 在所述目标基站为 家庭基站时， 所述指示消息还包括目标基站的闭合用户群标识及接入模式； 所述接入成功 指示单元、 第一去附着单元、 第二连接释放及指示单元、 接入失败指示单元、 第二去附着 单元及第四连接释放及指示单元具体用于根据所述切换的目标小区和 /或目标基站信息确 定切换的目标基站是否为家庭基站； 所述接入成功指示单元、 接入失败指示单元、 第二去 附着单元及第四连接释放及指示单元具体用于根据目标基站的闭合用户群标识及接入模 式， 结合 UE的签约数据确定 UE是否满足接入到所述目标基站的接入控制要求和接入到 请求接入的本地网络的接入控制要求。
本实施例还提供一种家庭基站， 包括： 指示消息发送单元， 用于确定 UE需进行切换 且已激活 LIPA连接时， 向核心网设备发送指示消息； 切换单元， 用于接收到所述核心网 设备返回的接入成功消息时， 开始执行所述 UE的切换相关操作。
优选地， 该家庭基站， 还包括： 失败处理单元， 用于接收到所述核心网设备返回的接 入失败消息时， 根据接入失败原因进行相应处理。
优选地， 指示消息发送单元发送的指示消息中包括切换的目标小区和 /或目标基站信 息， 在所述目标基站为家庭基站时， 所述指示消息还包括目标基站的闭合用户群标识及接 入模式。
本领域内的技术人员应明白， 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此， 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且， 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 （包括但不限于磁盘存储器、 CD-ROM、 光学存储器等）上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备（系统）、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器， 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中， 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品， 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上， 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理， 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例， 但本领域内的技术人员一旦得知了基本创造性概 念， 则可对这些实施例作出另外的变更和修改。 所以， 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然， 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种核心网设备处理本地 IP接入 LIPA连接的方法， 其特征在于， 包括： 接收源家庭基站确定 UE需进行切换且已激活 LIPA连接时， 所发送的指示消息； 根据所述指示消息、 UE的签约数据和本地网关相关信息， 确定 UE能够在保持 LIPA 连接的情况下实现切换时， 向源家庭基站返回接入成功消息， 指示所述源家庭基站开始执 行所述 UE的切换相关操作。
2、 如权利要求 1所述的方法， 其特征在于， 所述确定同时满足如下条件时， 确定 UE 能够在保持 LIPA连接的情况下实现切换：
切换的目标基站为家庭基站；
UE满足接入到所述目标基站的接入控制要求；
UE满足接入到请求接入的本地网络的接入控制要求；
所述目标基站为与源家庭基站连接到同一本地网关。
3、 如权利要求 1所述的方法， 其特征在于， 该方法应用于 LTE系统， 还包括： 根据所述指示消息，确定目标基站为宏基站时，判断 UE的 LIPA连接是否为最后一个 IP连接， 若是， 则发起 UE的去附着过程；
若否， 则发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源家庭基站 返回接入成功消息， 指示所述源家庭基站开始执行 UE的切换相关操作。
4、 如权利要求 1所述的方法， 其特征在于， 该方法应用于 UMTS系统， 还包括： 根据所述指示消息， 确定目标基站为宏基站时， 则发起 LIPA连接释放过程来释放 UE 的 LIPA连接， 释放成功后向源家庭基站返回接入成功消息， 指示所述源家庭基站开始执 行 UE的切换相关操作。
5、 如权利要求 1所述的方法， 其特征在于， 还包括：
根据所述指示消息， 确定目标基站为家庭基站时， 但 UE不满足接入到所述目标基站 的接入控制要求时， 向源家庭基站返回指示 UE不能接入目标基站的接入失败消息。
6、 如权利要求 1所述的方法， 其特征在于， 该方法应用于 LTE系统， 还包括： 根据所述指示消息， 确定目标基站为家庭基站， UE 满足接入到所述目标基站的接入 控制要求， 但 UE不满足接入到请求接入的本地网络的接入控制要求或 /和所述目标基站为 与源家庭基站连接到不同本地网关时， 判断 UE的 LIPA连接是否为最后一个 IP连接， 若 是， 则发起 UE的去附着过程；
若否， 则发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源家庭基站 返回接入成功消息， 指示所述源家庭基站开始执行 UE的切换相关操作。
7、 如权利要求 1所述的方法， 其特征在于， 该方法应用于 UMTS系统， 还包括： 根据所述指示消息， 确定目标基站为家庭基站， UE 满足接入到所述目标基站的接入 控制要求， 但 UE不满足接入到请求接入的本地网络的接入控制要求或 /和所述目标基站为 与源家庭基站连接到不同本地网关时， 发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源家庭基站返回接入成功消息， 指示所述源家庭基站开始执行 UE的切换相 关操作。
8、 如权利要求 2~7任一所述的方法， 其特征在于， 所述指示消息中包括切换的目标 小区和 /或目标基站信息， 在所述目标基站为家庭基站时， 所述指示消息还包括目标基站的 闭合用户群标识及接入模式；
所述核心网设备根据所述切换的目标小区和 /或目标基站信息确定切换的目标基站是 否为家庭基站；
确定目标基站为家庭基站时， 根据目标基站的闭合用户群标识及接入模式， 结合 UE 的签约数据确定 UE是否满足接入到所述目标基站的接入控制要求和接入到请求接入的本 地网络的接入控制要求。
9、 如权利要求 1 所述的方法， 其特征在于， 所述本地网关相关信息包括本地网关所 连接的家庭基站信息， 所述本地网关相关信息事先配置在所述核心网设备上或通过不同家 庭基站将其连接的本地网关信息的上报获得。
10、 一种家庭基站处理本地 IP接入 LIPA连接的方法， 其特征在于， 包括： 确定 UE需进行切换且已激活 LIPA连接时， 向核心网设备发送指示消息；
接收到所述核心网设备返回的接入成功消息时， 开始执行所述 UE的切换相关操作。
11、 如权利要求 10所述的方法， 其特征在于， 还包括：
接收到所述核心网设备返回的接入失败消息时， 根据接入失败原因进行相应处理。
12、 如权利要求 10或 11所述的方法， 其特征在于， 所述指示消息中包括切换的目标 小区和 /或目标基站信息， 在所述目标基站为家庭基站时， 所述指示消息还包括目标基站的 闭合用户群标识及接入模式。
13、 一种处理本地 IP接入 LIPA连接的核心网设备， 其特征在于， 包括：
指示消息接收单元， 用于接收源家庭基站确定 UE需进行切换且已激活 LIPA连接时， 所发送的指示消息；
接入成功指示单元， 用于根据所述指示消息、 UE 的签约数据和本地网关相关信息， 确定 UE能够在保持 LIPA连接的情况下实现切换时， 向源家庭基站返回接入成功消息，指 示所述源家庭基站开始执行 UE的切换相关操作。
14、 如权利要求 13 所述的核心网设备， 其特征在于， 所述接入成功指示单元具体用 于确定同时满足如下条件时，确定 UE能够在保持 LIPA连接的情况下实现切换：切换的目 标基站为家庭基站； UE满足接入到所述目标基站的接入控制要求； UE满足接入到请求接 入的本地网络的接入控制要求； 目标基站为与源家庭基站连接到同一本地网关。
15、 如权利要求 13所述的核心网设备， 其特征在于， 所述核心网设备应用于 LTE系 统， 还包括：
第一去附着单元，用于根据所述指示消息，确定目标基站为宏基站时，判断 UE的 LIPA 连接是否为最后一个 IP连接， 若是， 则发起 UE的去附着过程；
第一连接释放及指示单元，用于根据第一去附着单元的判断，确定 UE的 LIPA连接不 是最后一个 IP连接， 发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源 家庭基站返回接入成功消息， 指示所述源家庭基站开始执行所述 UE的切换相关操作。
16、 如权利要求 13所述的核心网设备， 其特征在于， 所述核心网设备应用于 UMTS 系统， 还包括：
第二连接释放及指示单元， 用于根据所述指示消息， 确定目标基站为宏基站时， 则发 起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向源家庭基站返回接入成功消 息， 指示所述源家庭基站开始执行 UE的切换相关操作。
17、 如权利要求 13所述的核心网设备， 其特征在于， 还包括：
接入失败指示单元， 用于根据所述指示消息， 确定目标基站为家庭基站时， 但 UE不 满足接入到所述目标基站的接入控制要求时， 向源家庭基站返回指示 UE不能接入目标基 站的接入失败消息。
18、 如权利要求 13所述的核心网设备， 其特征在于， 所述核心网设备应用于 LTE系 统， 还包括：
第二去附着单元， 用于根据指示消息， 确定目标基站为家庭基站， UE 满足接入到所 述目标基站的接入控制要求， 但 UE不满足接入到请求接入的本地网络的接入控制要求或 / 和目标基站为与源家庭基站连接到不同本地网关时，判断 UE的 LIPA连接是否为最后一个 IP连接， 若是， 则发起 UE的去附着过程；
第三连接释放及指示单元，用于根据第二去附着单元的判断，确定 UE的 LIPA连接不 是最后一个 IP连接时， 发起 LIPA连接释放过程来释放 UE的 LIPA连接， 释放成功后向 源家庭基站返回接入成功消息， 指示所述源家庭基站开始执行所述 UE的切换相关操作。
19、 如权利要求 13所述的核心网设备， 其特征在于， 所述核心网设备应用于 UMTS 系统， 还包括：
第四连接释放及指示单元， 根据所述指示消息， 确定目标基站为家庭基站， UE 满足 接入到所述目标基站的接入控制要求， 但 UE不满足接入到请求接入的本地网络的接入控 制要求或 /和所述目标基站为与源家庭基站连接到不同本地网关时， 发起 LIPA连接释放过 程来释放 UE的 LIPA连接，释放成功后向源家庭基站返回接入成功消息，指示所述源家庭 基站开始执行 UE的切换相关操作。
20、 如权利要求 14 19任一所述的核心网设备， 其特征在于， 所述指示消息中包括切 换的目标小区和 /或目标基站信息， 在所述目标基站为家庭基站时， 所述指示消息还包括目 标基站的闭合用户群标识及接入模式；
所述接入成功指示单元、 第一去附着单元、 第二连接释放及指示单元、 接入失败指示 单元、 第二去附着单元及第四连接释放及指示单元具体用于根据所述切换的目标小区和 / 或目标基站信息确定切换的目标基站是否为家庭基站；
所述接入成功指示单元、 接入失败指示单元、 第二去附着单元及第四连接释放及指示 单元具体用于根据目标基站的闭合用户群标识及接入模式， 结合 UE的签约数据确定 UE 是否满足接入到所述目标基站的接入控制要求和接入到请求接入的本地网络的接入控制 要求。
21、 一种家庭基站， 其特征在于， 包括：
指示消息发送单元，用于确定 UE需进行切换且已激活 LIPA连接时， 向核心网设备发 送指示消息；
切换单元， 用于接收到所述核心网设备返回的接入成功消息时， 开始执行所述 UE的 切换相关操作。
22、 如权利要求 21所述的家庭基站， 其特征在于， 还包括：
失败处理单元， 用于接收到所述核心网设备返回的接入失败消息时， 根据接入失败原 因进行相应处理。
23、 如权利要求 21或 22所述的家庭基站， 其特征在于， 指示消息发送单元发送的指 示消息中包括切换的目标小区和 /或目标基站信息， 在所述目标基站为家庭基站时， 所述指 示消息还包括目标基站的闭合用户群标识及接入模式。
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