WO2013000303A1 - Procédé, dispositif et système pour un transfert intercellulaire de cellule csf - Google Patents

Procédé, dispositif et système pour un transfert intercellulaire de cellule csf Download PDF

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Publication number
WO2013000303A1
WO2013000303A1 PCT/CN2012/073101 CN2012073101W WO2013000303A1 WO 2013000303 A1 WO2013000303 A1 WO 2013000303A1 CN 2012073101 W CN2012073101 W CN 2012073101W WO 2013000303 A1 WO2013000303 A1 WO 2013000303A1
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WO
WIPO (PCT)
Prior art keywords
target
plmn
csg cell
cell
base station
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PCT/CN2012/073101
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English (en)
Chinese (zh)
Inventor
杨义
张娟
Original Assignee
电信科学技术研究院
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Publication of WO2013000303A1 publication Critical patent/WO2013000303A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the present invention relates to the field of communications, and in particular, to a Closed Subscriber Group (CSG) handoff method, device, and system.
  • CSG Closed Subscriber Group
  • the CSG function can provide higher access levels and faster service rates for member users, and can also implement a special charging mode based on CSG cells.
  • UE User Equipment
  • a UE may sign up as a CSG member of multiple Public Land Mobile Networks (PLMNs) at the same time.
  • PLMNs Public Land Mobile Networks
  • HNB Home Node B
  • HB Home evolved Node B
  • LTE-A Long Term Evolution Advanced
  • HeNB GW evolved home base station gateway
  • An X2 interface can be established between HeNBs.
  • Each CSG cell has a CSG ID (ID), and the user equipment can obtain the CSG ID and working mode supported by the cell through the system information broadcasted by the air interface.
  • a cell that supports CSG functionality can have two modes of operation: Closed mode and Hybrid mode.
  • the closed mode CSG cell can only allow users who have subscribed to the CSG ID to access.
  • the mixed mode CSG cell also called Hybrid cell
  • HNB and HeNB are typical base stations that implement CSG functions.
  • other types of base stations such as an evolved base station (e B ) and a relay node (RN), can implement CSG functions.
  • the UE and the Home Subscriber Server store a CSG whitelist, which is the PLMN ID and the CSG ID signed under the PLMN.
  • the HSS sends the CSG cell information subscribed by the user to the currently registered PLMN to the Mobility Management Entity (MME) of the UE.
  • MME Mobility Management Entity
  • the Update Location Response (Update Location Answer) message contains CSG subscription data.
  • CSG subscription data includes CSG ID, expiration time, and so on.
  • the MME verifies whether the UE is allowed to access the CSG cell.
  • the UE sends a Proximity Indicator message to the serving base station, and notifies the serving base station of the frequency information of the cell.
  • the serving base station may send a measurement configuration of the frequency to the UE, and let the UE read the system information of the cell, and the important information, such as a physical layer identifier (PCI), and an EUTRAN cell global identifier ( The EUTRAN Cell Global Identifier (ECGI), the CSG ID, the member status (used to indicate whether the UE is a member of the CSG cell), and the like are reported to the serving base station, thereby facilitating the serving base station to select the target cell for the UE.
  • the base station needs to indicate whether the UE activates the proximity indication function in a Radio Resource Control (RRC) connection reconfiguration message. After the base station activates the proximity indication function, the UE may send the proximity indication message to the serving base station when the reporting condition is met.
  • RRC Radio Resource Control
  • the process when the UE performs X2 interface switching is shown in Figure 4.
  • the source base station (Source e B ) performs handover decision according to the measurement result of the UE, selects an appropriate target cell, and sends a handover request message to the target base station (Target eNB ).
  • the target base station reserves resources for the UE, it returns an acknowledgement message to the source base station, and generates a handover command, which is sent to the UE by the source base station.
  • the UE establishes an RRC connection with the target cell, and returns an RRC connection reconfiguration complete message to the target base station.
  • the target base station sends a path switch request message to the MME, updates the location information of the UE, and converts the downlink data transmission path.
  • the target base station informs the source base station to release the air interface resources of the UE.
  • the UE may perform an X2 interface between the two cells. Switch. Otherwise, only the S1 interface can be switched.
  • the flow when the UE performs S1 interface switching is shown in Figure 5.
  • the source base station performs a handover decision according to the measurement result of the UE, selects a suitable target cell, and sends a handover request message to the MME of the UE (ie, the source MME).
  • the source MME finds a target MME (Target MME) according to the identity of the target cell, and the target MME sends a handover request to the target base station.
  • the target base station reserves the resource for the UE, it returns a handover request acknowledgement message to the target MME, and generates a handover command, which is sent to the UE by the source MME and the source base station.
  • the UE After receiving the handover command, the UE establishes an RRC connection with the target cell, and returns an RRC connection reconfiguration complete message to the target base station. Then, the target base station sends a handover notification message to the MME, updates the location information of the UE, and converts the downlink data transmission path. Finally, the target MME notifies the source side to release the resources of the UE.
  • the source side (possibly e B, He B, RN, etc.) sends the CSG ID of the target cell to the source MME in a handover request (Handover Required).
  • the source MME checks whether the CSG ID is a member cell under the PLMN currently registered by the UE. If yes, continue to execute the S1 interface switching process, otherwise reject the switch.
  • the target cell is a Hybrid cell
  • the source MME determines whether the UE is a member user of the target Hybrid cell, and passes the judgment result ("member" or "non-member") to the target MME; the target MME passes the CSG ID and the member status.
  • a Handover Request is passed to the target e B.
  • Figure 6 shows the UE context modification process, which is used to modify the context that has been established for the UE, including repair Change security key, CSG member status, and more.
  • the MME may initiate a UE context modification procedure.
  • the e B learns that the CSG member status of the UE changes (from the member to the non-member) by using the UE Context Modification Request message, and the UE can be switched to other The cell, or the connection to release the UE.
  • the eNB learns, by using the UE Context Modification Request message, that the CSG member status of the UE changes (from member to non-member, or from non-member to member), according to the change.
  • the member status is the UE service.
  • the serving base station of the UE can only know these. Which CSG cells under the PLMN are the contracted member cells of the UE. This will cause the UE's serving base station to only switch the UE to the CSG member cell under these PLMNs.
  • the CSG information that the UE signs for each operator may be different, and it may be that the PLMN ID of some contracting operators does not appear on the EPLMN list.
  • the UE When the UE is close to the CSG member cell of an unregistered operator, but the PLMN ID corresponding to the CSG member cell is not in the EPLMN list, the UE cannot report to the network side that the CSG member cell is also a CSG member cell, and therefore the UE service The base station cannot switch the UE to the CSG member cell, thereby affecting the UE enjoying the membership of the CSG member cell.
  • the embodiment of the present invention provides a CSG cell handover method, device, and system, which are used to implement handover of a UE to a CSG cell other than a registered PLMN and a CSG cell under an EPLMN list.
  • the target CSG cell is a CSG cell in a specific public land mobile network PLMN of the UE, where the specific PLMN is a PLMN currently registered by the UE, and the like a PLMN other than the PLMN in the EPLMN list of the price;
  • the UE is handed over to the target CSG cell according to the proximity indication message.
  • the user equipment UE determines to be close to the target CSG cell, and the target CSG cell is a specific public land mobile network PLMN of the UE, and the specific PLMN is in a PLMN other than the PLMN currently registered by the UE and the PLMN in the equivalent PLMN list EPLMN list CSG cell;
  • the UE determines that a proximity indication message needs to be sent to the network side, where the proximity indication message is used to implement that the network side switches the UE to the target CSG cell;
  • the UE sends a proximity indication message to the network side.
  • a base station device includes: a proximity indication message receiving unit, configured to receive a proximity indication message sent by the user equipment UE when approaching the target CSG cell, where the target CSG cell is a specific public land mobile network PLMN of the UE, where the specific PLMN is currently registered by the UE PLMN and the CSG cell in the PLMN other than the PLMN in the equivalent PLMN list EPLMN list;
  • a proximity indication message receiving unit configured to receive a proximity indication message sent by the user equipment UE when approaching the target CSG cell, where the target CSG cell is a specific public land mobile network PLMN of the UE, where the specific PLMN is currently registered by the UE PLMN and the CSG cell in the PLMN other than the PLMN in the equivalent PLMN list EPLMN list;
  • a CSG cell switching unit configured to: switch the UE to the target CSG cell by using the proximity indication message.
  • a receiving unit configured to receive a PLMN ID, a CSG ID, and a cell access mode of a target CSG cell sent by the source base station of the UE;
  • the notification target MME unit is configured to notify the target MME of the PLMN ID, the CSG ID, and the cell access mode of the target CSG cell.
  • a base station configured to receive a proximity indication message sent by a user equipment UE when approaching a target CSG cell, where the target CSG cell is a specific public land mobile network PLMN of the UE, where the specific PLMN is a PLMN currently registered by the UE, and the like.
  • the mobility management entity MME when used as the source MME of the UE, when receiving the PLMN ID, CSG ID, and cell access mode of the target CSG cell sent by the source base station of the UE, the received PLMN ID and CSG ID And the cell access mode information is notified to the target MME; when the target MME is the UE, when the PLMN ID, the CSG ID, and the cell access mode of the target CSG cell sent by the source MME of the UE are received, the target base station UE is notified as the target CSG. Member of the community.
  • a base station configured to receive a proximity indication message sent by a user equipment UE when approaching a target CSG cell, where the target CSG cell is a specific public land mobile network PLMN of the UE, where the specific PLMN is a PLMN currently registered by the UE, and the like.
  • a PLLM cell in a PLMN other than the PLMN in the PLLM list EPLMN list switching the UE to the target CSG cell according to the proximity indication message;
  • the mobility management entity MME is configured to acquire CSG subscription data of the PLMN when the target MME is the UE, and determine, according to the CSG subscription data, whether the UE is a member user of the target CSG cell; when determining that the UE is not the target CSG cell When the user is a member, the UE's connection is released or the target base station UE is notified that it is not a member user of the target CSG cell.
  • Determining a proximity unit configured to determine a proximity public CSG cell, and the target CSG cell is a specific public land mobile network PLMN of the UE, the specific PLMN being a PLMN currently registered by the UE and an equivalent PLMN Listing CSG cells in PLMNs other than PLMNs in the EPLMN list;
  • Determining an indication unit configured to determine that a proximity indication message needs to be sent to the network side, where the proximity indication message is used to implement that the network side switches the UE to the target CSG cell;
  • a sending indication unit configured to send a proximity indication message to the network side.
  • a proximity indication message sent by a user equipment UE when approaching a target CSG cell is received, where the target CSG cell is a CSG cell in a specific public land mobile network PLMN of the UE, and the specific PLMN is in addition to the UE.
  • a CSG cell other than the CSG cell is other than the CSG cell.
  • FIG. 1 is a schematic diagram of an E-UTRAN network architecture including a HeNB
  • Figure 2 is a schematic diagram of the process of updating the location (Update Location);
  • Figure 3 is a schematic diagram of a message sending a Proximity indication
  • Figure 4 is a schematic diagram of the X2 interface switching process
  • FIG. 5 is a schematic diagram of a S1 interface switching process
  • FIG. 6 is a schematic diagram of a UE context modification process
  • FIG. 7 is a schematic flowchart of a method for switching a CSG cell according to an embodiment of the present disclosure
  • FIG. 8 is a schematic diagram of a TAU process (successful) according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a TAU process (when failed) according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of modifying a member state after a TAU process according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a base station device according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of an MME according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the embodiment of the present invention provides a CSG cell handover method, device, and system, which are used to implement handover of a UE to a CSG cell other than a registered PLMN and a CSG cell under an EPLMN list.
  • the base station has the opportunity to switch the UE to the CSG subscription cell under different PLMNs by allowing the CSG member cells in the UE to be in the CSG.
  • the UE when the CSG cell that the UE approaches is located in the CSG whitelist (not limited to whether it is a CSG cell under the current registered PLMN), the UE sends a proximity indication to the serving base station.
  • the base station allocates to the UE the measurement gap (Gap) used for measurement on this PLMN in the measurement configuration.
  • the UE sends the information of the PLMN ID, the CSG ID, the ECGI, the PCI, the member status, and the like of the CSG cell to the serving base station in the measurement report, so that the base station has the opportunity to switch the UE to the CSG cell.
  • the base station can use the RRC Connection Reconfiguration message to configure whether the UE activates the proximity indication procedure on other PLMNs.
  • the other PLMNs described in the embodiments of the present invention that is, the specific PLMNs, refer to PL pictures other than the PLMN currently registered by the UE and the PLMN in the equivalent PLMN list EPLMN list.
  • the target base station ie, the base station to which the target CSG cell belongs
  • the target MME ie, the MME to which the target CSG cell belongs
  • the UE switches to the target cell.
  • the target PLMN ie, the PLMN to which the target CSG cell belongs
  • the serving base station and the target base station of the UE include, but are not limited to, e B, HNB, HeNB, legs, and the like.
  • a method for switching a CSG cell includes the following steps:
  • the UE is switched to the target CSG cell according to the proximity indication message, including:
  • the source base station (the current serving base station of the UE) of the UE determines the target CSG cell according to the proximity indication message, and notifies the target base station that the UE is a member user of the target CSG cell.
  • the determining the target CSG cell includes determining information such as a serving base station (ie, a target base station) of the target CSG cell.
  • the UE is switched to the target CSG cell according to the proximity indication message, including:
  • the source base station of the UE determines the target CSG cell according to the proximity indication message
  • the source base station of the UE notifies the source mobility management entity (MME) of the UE, the PLMN ID, the CSG ID, and the cell access mode of the target CSG cell;
  • MME source mobility management entity
  • the source MME of the UE notifies the target MME of the target CSG cell's PLMN ID, CSG ID, and cell access mode;
  • the target MME informs the target base station that the UE is a member user of the target CSG cell.
  • the UE is switched to the target CSG cell according to the proximity indication message, including:
  • the serving base station of the UE regards the UE as a member user of the target CSG cell.
  • the method further includes:
  • the target MME acquires CSG subscription data of a specific PLMN, and determines whether the UE is based on the CSG subscription data. a member user of the target CSG cell;
  • the target MME determines that the UE is not a member user of the target CSG cell, the UE is released or the target base station UE is not a member user of the target CSG cell.
  • the target MME notifies that the target base station UE is not a member user of the target CSG cell
  • the target MME notifies the target base station UE that it is not a member user of the target CSG cell by using a downlink non-access stratum transmission ( Downlink NAS Transport) message.
  • Downlink NAS Transport Downlink non-access stratum transmission
  • the UE after the UE switches to the target CSG cell, it also checks whether the UE is a member user of the switched CSG cell according to the CSG subscription data of the PLMN to which the UE is handed over.
  • the method before receiving the proximity indication message sent by the UE when approaching the target CSG cell, the method further includes: sending, to the UE, indication information for activating the UE to perform the proximity indication function in the specific PLMN.
  • a method for switching a CSG cell according to an embodiment of the present invention includes:
  • the UE determines to be close to the target CSG cell, and the target CSG cell is a specific PLMN of the UE, and the specific PLMN is a CSG cell in a PLMN other than the PLMN currently registered by the UE and the PLMN in the equivalent PLMN list EPLMN list;
  • the UE determines that a proximity indication message needs to be sent to the network side, where the proximity indication message is used to implement that the network side switches the UE to the target CSG cell;
  • the UE sends a proximity indication message to the network side.
  • the UE determines that the proximity indication message needs to be sent to the network side, including:
  • the UE determines that the proximity indication message needs to be sent to the network side according to the preset proximity indication function performed in the specific PLMN; or
  • the UE determines, according to the indication information sent by the network side to activate the UE to perform the proximity indication function in the specific PLMN, that the proximity indication message needs to be sent to the network side.
  • Embodiment 1 X2 HO
  • the base station configures whether the UE activates the proximity indication function on other PLMNs (i.e., PLMNs other than the PLMN currently registered by the UE and the PLMN in the EPLMN list).
  • PLMNs i.e., PLMNs other than the PLMN currently registered by the UE and the PLMN in the EPLMN list.
  • the UE when the UE approaches a cell located in the CSG whitelist, it enters the coverage of the CSG cell, and the signal strength of the CSG cell reaches a preset threshold.
  • the UE sends a proximity indication message to the serving base station, where the frequency of the PLMN of the CSG cell is carried, and the PLMN ID can be further carried.
  • the UE When the UE is close to the target CSG cell, the UE knows the ID of the currently registered PLMN and the EPLMN list, so according to the PLMN ID corresponding to the CSG ID of the target CSG cell, it can be determined whether the target CSG cell is a CSG cell under another PLMN.
  • the target CSG cell is a CSG cell under other PLMNs, and the determination is stimulating If the proximity indication function is implemented on other PLMNs, a proximity indication message is sent to the serving base station.
  • the UE is switched to the target CSG cell by using the technical solution provided by the embodiment of the present invention. If the target CSG cell is a CSG cell under the registered PLMN or a CSG cell under the EPLMN list, the UE is handed over to the target CSG cell by using the prior art.
  • the serving base station of the UE sends measurement configuration information for measuring the CSG cell to the UE, including the PLMN. Frequency, measurement gap, etc.
  • the UE performs measurement on the CSG cell according to the measurement configuration information sent by the serving base station, and then sends the measured information such as PCI to the serving base station.
  • the serving base station uses the CSG cell as one of the handover candidate cells. Otherwise, the serving base station notifies the UE to read information such as the ECGI corresponding to the PCI. In this case, the UE needs to report the ECGI, PLMN ID, CSG ID, member status, and the like of the CSG cell corresponding to the PCI in the measurement report message.
  • the above steps enable the source base station of the UE to determine the target CSG cell, including determining the PLMN, the base station, and the like of the target CSG cell.
  • the serving base station i.e., the source base station
  • the source base station indicates the ID of the PLMN of the target CSG cell (also the PLMN ID located in the CSG white list of the UE) to the target base station in the message.
  • the target cell is a Hybrid cell
  • the source base station adds "member status" information to the message, that is, notifies the target base station UE as a member user of the target CSG cell, and the "member status" information is used to indicate whether the UE is a member of the target cell. user.
  • the target base station returns a handover request acknowledgement message to the source base station.
  • the source base station sends a handover command (i.e., an RRC connection reconfiguration message) to the UE.
  • a handover command i.e., an RRC connection reconfiguration message
  • the UE sends an RRC Connection Reconfiguration Complete message to the target base station.
  • the target base station sends a Path Switch Request message to the MME of the UE, and notifies the MME of the PLMN ID (ie, the PLMN ID of the target cell) registered by the current UE.
  • PLMN ID ie, the PLMN ID of the target cell
  • the MME returns a Path Switch Request Acknowledge message to the target base station.
  • the target base station sends a UE Context Release message to the source base station.
  • the UE After the handover is completed, the UE performs a Tracking Area Update (TAU) process, and the MME sends the ID of the current registered PLMN of the UE (ie, the PLMN of the currently switched CSG cell) to the HSS, and the HSS searches for the corresponding PLMN ID.
  • the CSG subscription data if found, sends the CSG subscription data of the UE to the MME. Otherwise, the other data corresponding to the PLMN ID is sent to the MME, where there is no CSG subscription data.
  • TAU Tracking Area Update
  • the MME determines, according to the received CSG subscription data, whether the current CSG cell of the UE allows the UE to access, specifically: If the CSG cell to which the UE is currently handed over is a closed mode CSG cell, and the UE is a member of the cell (ie, the CSG subscription data includes the ID of the current CSG cell of the UE), as shown in FIG. 8, the MME sends a TAU acceptance to the UE. (TAU Accept ) message; otherwise, the MME can:
  • the TAU is rejected and the UE connection is released.
  • the MME sends a TAU Accept message to the UE. Then, the MME initiates a UE context modification procedure to the serving base station of the UE, indicating that the UE is a "non-member" of the CSG cell. Subsequently, the UE's connection is released by the serving base station of the UE.
  • the MME indicates that the UE is a "non-member" in the Downlink NAS Transport message carrying the TAU Accept message on the S1 interface, that is, the last two steps in FIG. 10 need not be performed. Subsequently, the UE's serving base station releases the UE's connection, and the base station performs the process shown in FIG.
  • the MME sends a TAU Accept message to the UE, as shown in FIG. 8; As shown in FIG. 10, after the MME sends a TAU Accept message to the UE, the MME initiates a UE context modification procedure to the serving base station of the UE, indicating that the UE is a "non-member" of the CSG cell, but the serving base station of the UE does not need to release the UE. connection.
  • the purpose of the last two steps in FIG. 10 can also be implemented by indicating that the UE is a "non-member" in the Downlink NAS Transport message carrying the TAU Accept message on the S1 interface, so that the two steps are not performed, and then The base station performs the flow shown in FIG.
  • Embodiment 1 provides a preferred handover procedure.
  • the first step can be omitted, and the standardized configuration process is omitted by prescribing that the UE can make a proximity indication on other PLMNs.
  • the base station configures whether the UE activates the proximity indication function on other PLMNs (i.e., PLMNs other than the PLMN currently registered by the UE and the PLMN in the EPLMN list).
  • PLMNs i.e., PLMNs other than the PLMN currently registered by the UE and the PLMN in the EPLMN list.
  • the UE when the UE approaches a cell located in the CSG whitelist, it enters the coverage of the CSG cell, and the signal strength of the CSG cell reaches a preset threshold.
  • the UE sends a proximity indication message to the serving base station, where the frequency of the PLMN of the CSG cell is carried, and the PLMN ID can be further carried.
  • the UE When the UE is close to the target CSG cell, the UE knows the ID of the currently registered PLMN and the EPLMN list. Therefore, according to the PLMN ID corresponding to the CSG ID of the target CSG cell, it can be determined whether the target CSG cell is a CSG cell under another PLMN.
  • the target CSG cell is a CSG cell under other PLMNs, and it is determined that the proximity indication function is implemented on other PLMNs, and the proximity indication message is sent to the serving base station.
  • the UE is switched to the target CSG cell by using the technical solution provided by the embodiment of the present invention. If the target CSG cell is registered
  • the CSG cell under the PLMN or the CSG cell under the EPLMN list is switched to the target CSG cell by using the prior art.
  • the serving base station of the UE sends measurement configuration information for measuring the CSG cell to the UE, where Including the frequency of the PLMN, the measurement gap, and so on.
  • the UE performs measurement on the CSG cell according to the measurement configuration information sent by the serving base station, and then sends the measured information such as PCI to the serving base station.
  • the serving base station uses the CSG cell as one of the handover candidate cells. Otherwise, the serving base station notifies the UE to read information such as the ECGI corresponding to the PCI. In this case, the UE needs to report the ECGI, PLMN ID, CSG ID, member status, and the like of the CSG cell corresponding to the PCI in the measurement report message.
  • the serving base station (ie, the source base station) of the UE decides to handover the UE to the target cell, for example, when the signal strength of the cell exceeds a preset threshold, and decides to handover the UE to the cell, then to the MME of the UE (that is, The source MME sends a handover request (Handover Required), which includes the PLMN ID selected by the source base station, the CSG ID of the target cell, and the cell access mode.
  • a handover request Handover Required
  • the source MME does not check whether the UE is allowed to access the target cell, but passes information such as the ID of the PLMN of the target cell selected by the source base station, the CSG ID of the target cell, and the cell access mode (closed cell mode or Hybrid cell mode).
  • a Forward Relocation Request message is sent to the target MME.
  • the target MME sends the ID of the target cell and the CSG ID of the target cell to the target base station through the Handover Request message, that is, the target MME notifies the target base station UE as a member user of the target CSG cell, and allows the UE to access the target cell by default. . If the target cell is a Hybrid cell, the MME also needs to set the "member status" to "member" in the Handover Request message.
  • the subsequent process is the same as the process of switching the request confirmation step and the subsequent process in FIG.
  • a TAU procedure is initiated to the MME to verify whether the UE can be handed over to the target CSG cell.
  • the base station configures whether the UE activates the proximity indication function on other PLMNs (i.e., PLMNs other than the PLMN currently registered by the UE and the PLMN in the EPLMN list).
  • PLMNs i.e., PLMNs other than the PLMN currently registered by the UE and the PLMN in the EPLMN list.
  • the UE when the UE approaches a cell located in the CSG whitelist, it enters the coverage of the CSG cell, and the signal strength of the CSG cell reaches a preset threshold.
  • the UE sends a proximity indication message to the serving base station, where the frequency of the PLMN of the CSG cell is carried, and the PLMN ID can be further carried.
  • the UE when the UE approaches the target CSG cell, because the UE knows the ID of the currently registered PLMN and the EPLMN Therefore, according to the PLMN ID corresponding to the CSG ID of the target CSG cell, it can be determined whether the target CSG cell is a CSG cell under other PLMNs, if the target CSG cell is a CSG cell under other PLMNs, and it is determined that activation is performed on other PLMNs.
  • a proximity indication message is sent to the serving base station.
  • the UE is switched to the target CSG cell by using the technical solution provided by the embodiment of the present invention. If the target CSG cell is a CSG cell under the registered PLMN or a CSG cell under the EPLMN list, the UE is handed over to the target CSG cell by using the prior art.
  • the serving base station of the UE sends measurement configuration information for measuring the CSG cell to the UE, including the PLMN. Frequency, measurement gap, etc.
  • the UE performs measurement on the CSG cell according to the measurement configuration information sent by the serving base station, and then sends the measured information such as PCI to the serving base station.
  • the serving base station uses the CSG cell as one of the handover candidate cells. Otherwise, the serving base station notifies the UE to read information such as the ECGI corresponding to the PCI. In this case, the UE needs to report the ECGI, PLMN ID, CSG ID, member status, and the like of the CSG cell corresponding to the PCI in the measurement report message.
  • the serving base station ie, the source base station
  • the serving base station of the UE decides to handover the UE to the target cell, it sends a handover command to the UE, that is, sends an RRC Connection Reconfiguration message.
  • the serving base station of the UE regards the UE as a member user of the target cell, and specifically adds the identifier of the UE to the locally maintained target cell member list.
  • the UE returns an RRC Connection Reconfiguration Complete message to the serving base station.
  • a TAU procedure is initiated to the MME.
  • the MME sends the current registered PLMN of the UE to the HSS, and the HSS sends the CSG subscription data of the UE to the MME.
  • the MME determines, according to the received CSG subscription data, whether the current CSG cell of the UE allows the UE to access. If the MME has obtained the CSG subscription data of the UE under different PLMNs, it may determine whether the UE is allowed to access the current CSG cell after receiving the TAU Request sent by the UE.
  • the network side configures whether the UE activates the proximity indication function on other contracted PLMNs.
  • the CSG member cell PLMN ID, CSG ID, member status, etc.
  • the target eNB and the target MME first regard the UE as a member user of the target cell, and determine whether to allow the UE to access the target cell after obtaining the CSG subscription data of the UE on the target PLMN.
  • the MME side behavior has the following characteristics:
  • the source MME if the UE does not know the CSG subscription data on the target PLMN, the PLMN ID, the CSG ID, the cell access mode, and the like selected by the source base station are sent to the target MME; As the target MME, if the UE does not know the CSG subscription data on the target PLMN, the UE is regarded as a member user of the target cell;
  • Notifying the target base station UE as a "non-member" of the target cell by using the Downlink NAS Transport message that is, notifying the target base station UE that the target base station UE is not a member user of the target CSG cell by using a Downlink NAS Transport message;
  • the Path Switch Request ACK procedure is used to notify the target base station UE of the member status of the target cell (ie, whether it is a member user of the target cell).
  • the behavior of the base station side has the following characteristics:
  • the CSG cells of other PLMNs may be listed as handover candidate cells;
  • the target base station UE is indicated as a member user of the target cell.
  • the UE behavior has the following characteristics:
  • the measurement report carries information such as the PLMN ID of the CSG member cell on the other PLMN.
  • a base station device includes:
  • the proximity indication message receiving unit 11 is configured to receive a proximity indication message that is sent by the user equipment UE when approaching the target CSG cell, where the target CSG cell is a specific PLMN of the UE, and the specific PLMN is a PLMN that is currently registered by the UE and is equivalent. a PLSG cell in a PLMN other than the PLMN in the EPLMN list;
  • the CSG cell switching unit 12 is configured to switch the UE to the target CSG cell according to the proximity indication message.
  • the CSG cell switching unit 12 determines the target CSG cell according to the proximity indication message, and notifies the target base station UE as a member user of the target CSG cell.
  • the CSG cell switching unit 12 may further determine a target CSG cell according to the proximity indication message; and notify the source MME UE of the UE as a member user of the target CSG cell.
  • the CSG cell switching unit 12 can also use the UE as a member user of the target CSG cell.
  • the device further includes: an activation unit 13 configured to send, to the UE, indication information for activating the UE to perform a proximity indication function in the specific PLMN.
  • an activation unit 13 configured to send, to the UE, indication information for activating the UE to perform a proximity indication function in the specific PLMN.
  • a mobility management device includes:
  • the receiving unit 31 is configured to receive a PLMN ID, a CSG ID, and a cell access mode of the target CSG cell sent by the source base station of the UE;
  • the notification target MME unit 32 is configured to notify the target MME of the target CSG cell's PLMN ID, CSG ID, and cell access mode.
  • the device further includes: a notification target base station unit 33, configured to notify the target base station UE of the target CSG when receiving the PLMN ID, the CSG ID, and the cell access mode of the target CSG cell sent by the source MME of the UE. Member of the community.
  • a notification target base station unit 33 configured to notify the target base station UE of the target CSG when receiving the PLMN ID, the CSG ID, and the cell access mode of the target CSG cell sent by the source MME of the UE. Member of the community.
  • the embodiment of the invention provides a network system, including:
  • a base station configured to receive a proximity indication message sent by the user equipment UE when approaching the target CSG cell, where the target CSG cell is a specific PLMN of the UE, where the specific PLMN is in addition to the PLMN currently registered by the UE and the equivalent PLMN list EPLMN list a CSG cell in a PLMN other than the PLMN; determining a target CSG cell according to the proximity indication message; notifying the source MME UE of the UE as a member user of the target CSG cell;
  • the MME when used as the source MME of the UE, when receiving the PLMN ID, CSG ID, and cell access mode of the target CSG cell sent by the source base station of the UE, the received PLMN ID, CSG ID, and cell access
  • the mode notification target MME is configured to notify the target base station UE as a member user of the target CSG cell when receiving the PLMN ID, the CSG ID, and the cell access mode of the target CSG cell transmitted by the source MME of the UE.
  • the target MME is further configured to acquire CSG subscription data of the specific PLMN, and determine, according to the CSG subscription data, whether the UE is a member user of the target CSG cell, and when the UE is determined to be not a member user of the target CSG cell, release the UE connection. Or the target base station UE is notified that it is not a member user of the target CSG cell.
  • the target MME notifies that the target base station UE is not a member user of the target CSG cell
  • the target MME notifies the target base station UE that it is not a member user of the target CSG cell by using a Downlink NAS Transport message.
  • another network system provided by the embodiment of the present invention includes:
  • a base station configured to receive a proximity indication message sent by the UE when approaching the target CSG cell, where the target CSG cell is a specific PLMN of the UE, where the specific PLMN is a PLMN in the EPLMN list and the equivalent PLMN list in the EPLMN list.
  • CSG cell in the PLMN handover the UE to the target CSG cell according to the proximity indication message;
  • the MME is configured to acquire the CSG subscription data of the specific PLMN when the target MME is the UE, and determine whether the UE is a member user of the target CSG cell according to the CSG subscription data, and release the UE when the UE is determined to be a member user of the target CSG cell.
  • the connection of the UE or the notification target base station UE is not a member user of the target CSG cell.
  • the Downlink NAS Transport message informs the target base station that the UE is not a member user of the target CSG cell.
  • the base station determines the target CSG cell according to the proximity indication message, and notifies the target base station UE as a member user of the target CSG cell;
  • the base station determines the target CSG cell according to the proximity indication message; notifies the source MME of the UE that the UE is the target
  • the base station uses the UE as a member user of the target CSG cell.
  • a user equipment provided by an embodiment of the present invention includes:
  • the determining indication unit 22 is configured to determine that a proximity indication message needs to be sent to the network side, where the proximity indication message is used to implement that the network side switches the UE to the target CSG cell;
  • the sending indication unit 23 is configured to send a proximity indication message to the network side.
  • the determining indication unit 22 determines that the proximity indication message needs to be sent to the network side according to the preset proximity indication function performed in the specific PLMN; or
  • the determining indication unit 22 determines that the proximity indication message needs to be sent to the network side according to the indication information sent by the network side for activating the UE to perform the proximity indication function in the specific PLMN.
  • the target CSG member cell when the target CSG member cell does not support the current registered PLMN and EPLMN of the UE, but belongs to the user signing CSG cell, and the source side does not have the CSG subscription information of the UE in the target PLMN, the source side notification
  • the target side UE is a member user of the target cell.
  • the source side is the source base station, and the source base station indicates that the target base station UE is a member user of the target cell.
  • the source side is the source MME, and the source MME sends information such as the PLMN ID of the target cell, the CSG ID, and the cell access mode to the target MME.
  • both the source side and the target measurement are serving base stations of the UE, and the serving base station regards the UE as a member user of the target cell.
  • the target MME indicates in the Handover Request that the UE is a member user of the target cell.
  • the MME determines whether the UE allows access to the target CSG cell. When the result is no, the UE's connection is released or the base station is notified to change the CSG member status of the UE.
  • the CSG cell information reported by the UE includes a PLMN ID, a CSG ID, a CSG member status, and the like;
  • the UE Before reporting the CSG member cell, the UE receives the configuration information that is sent by the base station to perform measurement on the unregistered PLMN.
  • the UE Before the UE sends the proximity indication, the UE receives the indication that the base station activates "Perform the proximity indication function on the unregistered PLMN.”
  • the MME When the MME has the CSG subscription data of the UE on the target PLMN, the MME notifies the target base station UE whether it is a member user of the target cell during the path transition.
  • the core network passes the downlink NAS direct transmission. Or UE context modification process, indicating member information.
  • the technical solution provided by the embodiment of the present invention enables the UE to switch between the CSG cells that are subscribed, which breaks the current registration only in the PLMN or the EPLMN.
  • the limitation of the cross-CSG cell handover is performed, so that the UE can better obtain the service of the CSG member cell.
  • 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 is in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • 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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un dispositif et un système pour un transfert intercellulaire de cellule de groupe d'abonnés fermé (CSG), applicables dans un transfert intercellulaire d'un équipement utilisateur (UE) à un réseau mobile terrestre public (PLMN) spécifique. Le PLMN spécifique est une cellule CSG d'un PLMN qui n'est pas un PLMN actuellement enregistré par l'UE ou un PLMN sur une liste de PLMN équivalents (liste EPLMN). Le procédé pour un transfert intercellulaire de cellule CSG fourni dans la présente invention comprend : la réception d'un message d'indication d'approche transmis par l'UE lors de l'approche d'une cellule CSG cible, la cellule CSG cible étant la cellule CSG du PLMN spécifique de l'UE, et le PLMN spécifique étant le PLMN distant du PLMN actuellement enregistré par l'UE et le PLMN dans la liste EPLMN ; et le transfert intercellulaire de l'UE à la cellule CSG cible sur la base du message d'indication d'approche.
PCT/CN2012/073101 2011-06-28 2012-03-27 Procédé, dispositif et système pour un transfert intercellulaire de cellule csf WO2013000303A1 (fr)

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