WO2016180157A1

WO2016180157A1 - Method and apparatus for implementing handover of user equipment (ue) between base stations

Info

Publication number: WO2016180157A1
Application number: PCT/CN2016/079324
Authority: WO
Inventors: 张大钧; 刘爱娟; 汪颖
Original assignee: 电信科学技术研究院
Priority date: 2015-05-14
Filing date: 2016-04-14
Publication date: 2016-11-17
Also published as: CN106304218A; CN106304218B

Abstract

Disclosed are a method and apparatus for implementing a handover of a user equipment between base stations, so as to improve performance of the UE to be handed over between the base stations, and avoid the problem caused when a CSG cell may access a UE that does have a right or the problem of failing to correctly select, for the UE, a target node accessed by the UE, when a target eNB performs a dual-connection decision. The method provided in the present invention comprises: when a handover of a UE between a first base station and a second base station needs to performed and a cell to be handed over in a target secondary cell group (SCG) is a closed subscriber group (CSG) cell, a first base station determines CSG cell information of the target SCG; and the first base station notifies the CSG cell information of the target SCG to the second base station.

Description

Method and device for realizing inter-base station handover of user equipment UE

The present application claims priority to Chinese Patent Application No. 201510246159.6, entitled "A Method and Apparatus for Inter-Base Station Handover for User Equipment UE", which is filed on May 14, 2016, the entire contents of which is incorporated herein by reference. This is incorporated herein by reference.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for implementing inter-base station handover of a user equipment UE.

Background technique

With the deployment of many local nodes such as home base stations, micro cells, and relays, the traditional macro base station-based network architecture will gradually evolve into a network architecture where more types of base stations coexist, and provide more layers. Network coverage. In order to improve the correlation performance of the multi-type base station coexistence network architecture, a network architecture for implementing cooperation/aggregation between multiple evolved base stations (eNBs) through non-ideal links is proposed. In this architecture, a part of the radio bearers (RBs) of the user equipment (User Equipment, UE) is on the master cell group (MCG) managed by the master eNB (MeNB). The Signaling Radio Bearer (SRB) and the User Radio Bearer (DRB), and the Primary Cell (PCell) has a Physical Uplink Control Channel (PUCCH). The other part of the same UE is carried on a secondary cell group (SCG) managed by a secondary eNB (SeNB), and one primary secondary cell (PSCell) has a PUCCH. Since the same UE is connected at the same time in two eNBs under this architecture, it is called a Dual Connectivity (DC) UE.

When the macro cell performs the inter-base station handover operation on the UE, if the target macro cell of the handover supports the dual connectivity operation, the target SCG is a Closed Subscriber Group (CSG) cell or other physical layer cell identifier (physical cell). Identity, PCI) In the case of a small cell (Small Cell), the existing mechanism may cause the CSG cell to access the unprivileged UE or the PCI conflict and cannot correctly select the target node, thus affecting the handover performance.

The following describes the dual connectivity technology.

In a possible multi-layer network coverage environment shown in FIG. 1, a non-ideal data/signaling interface, the Xn interface, is used between the MeNB and the SeNB, and the UE can work under the MeNB and the SeNB at the same time. When the UE connected to the MeNB enters the coverage of the cell corresponding to the SeNB, the MeNB may transfer part or all of the data/signaling of the UE to the SeNB according to signal strength or load balancing, etc., to obtain the service provided by the SeNB. So that the UE can be the same The resources of the MeNB and the SeNB and the inter-base station aggregation (inter-eNB aggregation) resources are used. In this scenario, multiple RBs of the UE may be respectively carried by the SCG cell and the MCG cell. The RB in which the SeNB is separated may include a DRB and/or an SRB.

The signaling flow of the SCG addition performed during the double-connection operation performed during the inter-eNB handover is as shown in FIG. 2 .

In summary, when the macro cell performs the inter-base station handover operation of the UE in the macro cell, if the target SCG of the handover is a CSG cell or another Small Cell that may have a PCI collision, the target eNB may perform a dual connectivity decision. The CSG cell accesses the UE without the privilege or the problem that the target node cannot be correctly selected for the UE due to the PCI conflict, thereby affecting the handover performance.

Summary of the invention

The embodiments of the present invention provide a method and a device for implementing inter-base station handover of a user equipment, which are used to improve the performance of handover between UEs in a base station, and avoid the CSG cell access that may occur when the target eNB performs dual connectivity determination. The privileged UE, or the target node that cannot be selected by the PCI for the UE to correctly select the UE to access the target node.

A method for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

Determining CSG cell information of the target SCG when the first base station determines that the UE needs to perform handover between the first base station and the second base station, and the cell in the target secondary cell group SCG of the handover is a closed user group CSG cell;

The first base station notifies the second base station of CSG cell information of the target SCG.

With the method, the first base station determines that the UE needs to perform handover between the first base station and the second base station, and the cell in the target secondary cell group SCG of the handover is a closed user group CSG cell, determining the target SCG. CSG cell information; the first base station notifying the second base station of the CSG cell information of the target SCG, so that the second base station can decide whether to perform a dual connectivity operation according to the CSG cell information of the target SCG, for example, if the target SCG If the CSG cell is in the close mode, but the UE does not belong to the CSG member, the second base station (the target eNB) will refuse to perform the dual connectivity operation for the target SCG, thereby avoiding the CSG cell connection that may occur when the target eNB performs the dual connectivity decision. Entered a UE without permission.

Preferably, the first base station specifically notifies the second base station of the CSG cell information of the target SCG by using a handover request message.

Preferably, the first base station specifically adopts a newly added application protocol AP information unit IE, or uses a radio resource to control an RRC container container, and notifies the CSG cell information of the target SCG by using a handover request message. The second base station.

Preferably, the CSG cell information of the target SCG includes: CSG cell member status information of the target SCG, and/or an evolved universal terrestrial radio access network global cell identity ECGI, and/or CSG identification information.

Preferably, the CSG cell supports a hybrid hybrid mode or a closed close mode.

The second base station acquires closed subscriber group CSG cell information of the target secondary cell group SCG sent by the first base station, where the first base station is an original base station that performs inter-base station handover of the UE, and the second base station is used to switch between the base stations. a target base station, the target SCG is a target SCG for handover between the base stations, and a cell in the target SCG is a CSG cell;

Determining, by the second base station, a dual connectivity setup operation to the target SCG according to the CSG cell information of the target SCG.

Preferably, when the CSG cell information of the target SCG includes CSG cell member status information of the target SCG;

Determining, by the second base station, a dual connectivity establishment operation to the target SCG according to the CSG cell information of the target SCG, including:

And determining, by the second base station, that the target SCG is a CSG cell in a closed mode, and determining that the UE does not belong to a CSG cell according to CSG cell member status information of the target SCG, determining to refuse to initiate to the target SCG. Dual connection setup operation.

Determining, in the target SCG, when the first base station determines that the UE needs to perform handover between the first base station and the second base station, and the cell in the target secondary cell group SCG of the handover is an open mode home base station cell or a small cell Evolved universal terrestrial radio access network global cell identity ECGI;

The first base station notifies the second base station of an ECGI of a cell in the target SCG.

With the method, when the first base station determines that the handover between the first base station and the second base station needs to be performed, and the cell in the target secondary cell group SCG of the handover is the home base station cell or the small cell in the open mode, determining the location An evolved universal terrestrial radio access network global cell identity ECGI of a cell in the target SCG; the first base station notifying the second base station of the ECGI of the cell in the target SCG, thereby causing the second base station (target eNB) can root According to the ECGI of the cell in the target SCG, the target SCG node that performs the dual connectivity operation is determined, and the problem that the target node that the UE access cannot be correctly selected due to the PCI conflict is avoided.

Preferably, the first base station notifies the ECGI of the cell in the target SCG to the second base station by using a handover request message.

Preferably, the first base station specifically adopts a newly added application protocol AP information unit IE, or uses a radio resource to control an RRC container container, and notifies an ECGI of a cell in the target SCG by using a handover request message. To the second base station.

Obtaining, by the second base station, an evolved universal terrestrial radio access network global cell identifier ECGI of the cell in the target secondary cell group SCG sent by the first base station; where the first base station is an original base station performing inter-base station handover of the UE, where The second base station is a target base station for handover between the base stations, and the target SCG is a target SCG for handover between the base stations;

The second base station initiates a dual connectivity setup operation to a cell in the target SCG according to an ECGI of a cell in the target SCG.

An apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

a first unit, configured to determine, when determining, that the UE needs to perform handover between the first base station and the second base station, and the cell in the target secondary cell group SCG of the handover is a closed user group CSG cell, CSG cell information of the target SCG;

And a second unit, configured to, on the first base station side, notify the second base station of CSG cell information of the target SCG.

Preferably, the second unit specifically notifies the second base station of the CSG cell information of the target SCG by using a handover request message.

Preferably, the second unit specifically adopts a newly added application protocol AP information unit IE, or uses a radio resource to control an RRC container container, and notifies the CSG cell information of the target SCG by using a handover request message. The second base station.

Preferably, the CSG cell supports a hybrid hybrid mode or a closed close mode.

a third unit, configured to acquire, on the second base station side, closed subscriber group CSG cell information of the target secondary cell group SCG sent by the first base station, where the first base station is an original base station that performs inter-base station handover of the UE, where The second base station is a target base station for handover between the base stations, the target SCG is a target SCG for handover between the base stations, and a cell in the target SCG is a CSG cell;

a fourth unit, configured to determine, according to the CSG cell information of the target SCG, on the second base station side A dual connectivity setup operation is initiated to the target SCG.

The fourth unit is specifically configured to: when the target SCG is a CSG cell in a closed mode, and determine, according to the CSG cell member status information of the target SCG, that the UE does not belong to a CSG cell. The member decides to refuse to initiate a dual connection establishment operation to the target SCG.

Preferably, the apparatus further includes the first unit and the second unit described above.

a fifth unit, configured to, on the first base station side, determine that handover of the UE between the first base station and the second base station is required, and the cell in the target secondary cell group SCG of the handover is an open mode home base station cell or small Determining, by the cell, an evolved universal terrestrial radio access network global cell identity ECGI of the cell in the target SCG;

And a sixth unit, configured to, at the first base station side, notify an ECGI of a cell in the target SCG to the second base station.

Preferably, the sixth unit specifically notifies the second base station of the ECGI of the cell in the target SCG by using a handover request message.

Preferably, the sixth unit specifically adopts a newly added application protocol AP information unit IE, or uses a radio resource to control an RRC container container, and notifies an ECGI of a cell in the target SCG by using a handover request message. To the second base station.

Preferably, the apparatus further comprises the first unit and the second unit, and/or the third unit and the fourth unit.

a seventh unit, configured to acquire, on the second base station side, an evolved universal terrestrial radio access network global cell identifier ECGI of a cell in the target secondary cell group SCG sent by the first base station, where the first base station is a UE The original base station for inter-base station handover, the second base station is the target base station for inter-base station handover, and the target SCG is the target SCG for handover between the base stations;

And an eighth unit, configured to, on the second base station side, initiate a dual connectivity setup operation to the cell in the target SCG according to an ECGI of the cell in the target SCG.

Preferably, the apparatus further comprises: said first unit and second unit, and/or third unit and fourth unit of said apparatus, and/or said fifth unit and said Six units.

An apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes: a processor and a memory;

When the device is used as a device on the original base station side for switching between base stations, the processor is configured to read a program in the memory, Perform the following process:

Determining, on the first base station side, the CSG of the target SCG when determining that handover of the UE between the first base station and the second base station is required, and the cell in the target secondary cell group SCG of the handover is a closed subscriber group CSG cell Cell information

And on the first base station side, the CSG cell information of the target SCG is notified to the second base station by a transceiver.

Preferably, the processor specifically controls the transceiver to notify the second base station of the CSG cell information of the target SCG by using a handover request message.

Preferably, the processor specifically adopts a newly added application protocol AP information unit IE, or uses a radio resource to control an RRC container container, and controls the transceiver to notify the CSG cell information of the target SCG by using a handover request message. The second base station.

When the device is used as a device on the target base station side for inter-base station handover, the processor is further configured to read a program in the memory and perform the following process:

And acquiring, by the second base station, closed subscriber group CSG cell information of the target secondary cell group SCG sent by the first base station, where the first base station is an original base station performing inter-base station handover of the UE, and the second base station is the a target base station for inter-base station handover, the target SCG is a target SCG for handover between the base stations, and a cell in the target SCG is a CSG cell;

And determining, by the second base station side, whether to initiate a dual connectivity establishing operation to the target SCG according to the CSG cell information of the target SCG.

When the CSG cell information of the target SCG includes CSG cell member status information of the target SCG;

The processor determines to refuse to initiate dual connectivity establishment to the target SCG when the target SCG is a CSG cell in a closed mode and determines that the UE does not belong to a CSG cell according to the CSG cell member state information of the target SCG. operating.

Preferably, when the device is used as a device on the original base station side to switch between base stations, the processor is further configured to read a program in the memory and perform the following process:

Determining, at the first base station side, when it is determined that handover of the UE between the first base station and the second base station is required, and the cell in the handover target secondary cell group SCG is an open mode home base station cell or a small cell. Evolved universal terrestrial radio access network global cell identity ECGI of the cell in the target SCG;

And on the first base station side, the control transceiver notifies the ECGI of the cell in the target SCG to the second base station.

Preferably, the processor specifically controls the transceiver to notify the second base station of the ECGI of the cell in the target SCG by using a handover request message.

Preferably, the processor specifically adopts a newly added application protocol AP information unit IE, or adopts wireless The manner in which the resource controls the RRC container container, the control transceiver notifies the ECGI of the cell in the target SCG to the second base station by using a handover request message.

Acquiring, on the second base station side, an evolved universal terrestrial radio access network global cell identifier ECGI of a cell in the target secondary cell group SCG sent by the first base station; where the first base station is the original for performing inter-base station handover of the UE a base station, the second base station is a target base station for handover between the base stations, and the target SCG is a target SCG for handover between the base stations;

And on the second base station side, according to the ECGI of the cell in the target SCG, initiate a dual connectivity setup operation to the cell in the target SCG.

The transceiver is configured to receive and transmit data under the control of a processor.

DRAWINGS

1 is a schematic diagram of a dual-connected network architecture in the prior art;

2 is a schematic diagram of a signaling flow for performing SCG addition in a handover process between base stations in the prior art;

FIG. 3 is a schematic flowchart of a first method for implementing inter-base station handover of a user equipment UE according to an embodiment of the present disclosure;

FIG. 4 is a schematic flowchart of a second method for implementing inter-base station handover of a user equipment UE according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of a third method for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention;

FIG. 6 is a schematic flowchart of a fourth method for implementing inter-base station handover of a user equipment UE according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of an apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of an apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of an apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), etc.

It should be understood that, in the embodiment of the present invention, the user equipment (User Equipment, UE) includes but is not limited to a mobile station (MS, Mobile Station), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular" The telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.

In an embodiment of the invention, a base station (e.g., an access point) may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.

The embodiments of the present invention provide a method and a device for implementing inter-base station handover of a user equipment, which are used to improve the performance of handover between UEs in a base station, and avoid the CSG cell access that may occur when the target eNB performs dual connectivity determination. The privileged UE or the target node that cannot be correctly selected by the UE due to the PCI conflict.

In the technical solution provided by the embodiment of the present invention, when the UE performs inter-eNB handover, if the candidate target SCG is a CSG cell, and the CSG cell supports a hybrid or close mode, the primary eNB The target eNB needs to be notified, member status information about the candidate target CSG cell, and/or E-UTRAN Cell Global Identifier (ECGI) information (cell unique identifier) And/or CSG identification (ID), the target eNB can decide whether to perform dual connectivity based on the information. Operation, for example, if the CSG cell is in close mode but the UE does not belong to the CSG member, the target eNB will refuse to perform dual connectivity operation for the CSG cell; further, if the CSG cell is in hybrid mode, the primary eNB needs to be a CSG member. The member status information informs the target SCG.

In the technical solution provided by the embodiment of the present invention, when the UE performs inter-eNB handover, if the candidate target SCG is an open mode HeNB cell or other Small Cell that may have a PCI conflict, in order to prevent PCI conflicts The primary eNB needs to notify the target eNB that the target eNB may determine the target SCG node that performs the dual connectivity operation according to the information about the candidate target HeNB cell or the ECGI information (cell unique identifier) of the Small Cell that may have a PCI collision.

The technical solutions provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

Referring to FIG. 3, a method for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

S101. The first base station determines that a handover between the first base station and the second base station is required, and the cell in the target secondary cell group SCG is a closed user group CSG cell, and determines a CSG cell of the target SCG. information;

S102. The first base station notifies the second base station of CSG cell information of the target SCG.

Preferably, the first base station specifically adopts a newly added application protocol (AP) information element (IE) manner, or adopts a radio resource control (RRC) container, and the handover request message is used to The CSG cell information of the target SCG is notified to the second base station.

Preferably, the CSG cell information of the target SCG includes: CSG cell member status information of the target SCG, and/or an evolved universal terrestrial radio access network global cell identity (ECGI), and/or CSG identification information. .

Preferably, the CSG cell supports a hybrid mode or a close mode.

Correspondingly, on the second base station side, referring to FIG. 4, a method for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

S201. The second base station acquires closed user group CSG cell information of the target secondary cell group SCG sent by the first base station, where the first base station is an original base station that performs inter-base station handover of the UE, and the second base station is the base station. Switching a target base station, where the target SCG is a target SCG for handover between the base stations, and a cell in the target SCG is a CSG cell;

S202. The second base station determines, according to the CSG cell information of the target SCG, whether to initiate a dual connectivity setup operation to the target SCG.

Referring to FIG. 5, a method for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

S301. When the first base station determines that the UE needs to perform handover between the first base station and the second base station, and the cell in the target secondary cell group SCG of the handover is an open mode home base station cell or a small cell, determine the target. Evolved universal terrestrial radio access network global cell identity ECGI of the cell in the SCG;

S302. The first base station notifies an ECGI of a cell in the target SCG to the second base station.

With the method, when the first base station determines that the handover between the first base station and the second base station needs to be performed, and the cell in the target secondary cell group SCG of the handover is the home base station cell or the small cell in the open mode, determining the location An evolved universal terrestrial radio access network global cell identity ECGI of a cell in the target SCG; the first base station notifying the second base station of the ECGI of the cell in the target SCG, thereby causing the second base station (target The eNB may determine the target SCG node that performs the dual connectivity operation according to the ECGI of the cell in the target SCG, and avoids the problem that the target node that cannot access the UE is correctly selected due to the PCI conflict.

Correspondingly, on the second base station side, referring to FIG. 6, a method for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

S401. The second base station acquires an evolved universal terrestrial radio access network global cell identifier ECGI of a cell in the target secondary cell group SCG sent by the first base station, where the first base station is an original base station that performs inter-base station handover of the UE. , The second base station is a target base station for handover between the base stations, and the target SCG is a target SCG for handover between the base stations;

S402. The second base station initiates a dual connectivity setup operation to a cell in the target SCG according to an ECGI of a cell in the target SCG.

An example of the following specific embodiments is given below:

Example 1:

Assuming that the first eNB is performing a dual connectivity operation, the inter-base station handover procedure provided in this embodiment specifically includes:

Step 1: The first eNB determines that an inter-eNB handover operation needs to be performed according to the measurement report of the UE and the Radio Resource Management (RRM) information of the network. In addition, the first eNB decides that the operation of the SCG may need to be replaced.

Step 2: When the cell in the one or more target SCGs belongs to the CSG cell, and the target SCG (the cell in the target SCG is a CSG cell) supports the hybrid mode, and the first eNB obtains the UE through the UE measurement report or other manners. The CSG cell information of the target SCG specifically includes the member status information of the CSG cell (that is, information indicating whether the UE that needs to perform inter-base station handover is a CSG cell member), and information of a CSG cell such as an ECGI or a CSG ID, An eNB notifies the information to the second eNB by using a handover request message, where the first eNB is the primary eNB and the second eNB is the target eNB;

Specifically, the first eNB may use the newly added Application Protocol (AP) Information Element (IE) of the Xn interface, and carry the CSG cell information of the target SCG, and notify the second eNB by using a handover request message.

Step 3: The second eNB performs an inter-base station handover decision according to the received handover request information (including the CSG cell information of the target SCG).

Specifically, the second eNB determines that the dual-connection operation can be performed for the CSG cell according to the CSG cell information of the target SCG, and needs to notify the target SCG of the member status information of the CSG cell.

Step 4: If the cell in the target SCG selected by the second eNB is a CSG cell, the second eNB initiates a dual connectivity setup operation according to the ECGI carried in the handover request message to the selected target SCG.

Step 5: The second eNB returns a handover response message to the first eNB according to the configuration information returned by the target SCG and the configuration information of the second eNB.

Step 6: The first eNB performs a subsequent Radio Resource Control (RRC) reconfiguration operation.

Step 7: The first eNB releases the original network and air interface resources.

Example 2:

Specifically, the second eNB carries the CSG cell information of the target SCG in an RRC container, and notifies the second eNB by using a handover request message.

The subsequent steps are equivalent to steps three to seven in the embodiment 1.

Example 3:

Step 2: When the cell in the one or more target SCGs belongs to the CSG cell, and the target SCG (the cell in the target SCG is a CSG cell) supports the close mode, and the first eNB obtains the UE through the UE measurement report or other manners. The CSG cell information of the target SCG specifically includes the member status information of the CSG cell (that is, information indicating whether the UE that needs to perform inter-base station handover is a CSG cell member), and information of a CSG cell such as an ECGI or a CSG ID, An eNB notifies the information to the second eNB by using a handover request message, where the first eNB is the primary eNB and the second eNB is the target eNB;

Specifically, the first eNB may carry the CSG cell information of the target SCG in a manner of newly adding an AP IE, and notify the second eNB by using a handover request message.

Step 3: The second eNB performs a handover decision according to the received handover request information (including the CSG cell information of the target SCG).

Specifically, the second eNB may perform the following decision operation:

If the UE does not belong to the CSG member, the second eNB will refuse to perform a dual connectivity operation for the CSG cell in the target SCG;

If the UE belongs to a CSG member, the second eNB confirms that a dual connectivity operation can be performed for the CSG cell in the target SCG.

Example 4:

Specifically, the second eNB carries the CSG cell information of the target SCG in an RRC container manner, and notifies the second eNB by using a handover request message.

Specifically, the second eNB may perform the following decision operation:

Example 5:

Assuming that the first eNB is performing a single connection operation, the inter-base station handover procedure provided in this embodiment specifically includes:

Step 1: The first eNB determines that the inter-eNB needs to be performed according to the measurement report of the UE and the RRM information of the network. Switching operation, further, the first eNB determines that the second eNB allows the operation of the SCG dual connection;

Step 2: When the cells in the one or more target SCGs belong to the CSG cell, and the CSG cells in the SCG support the hybrid mode, the subsequent steps are equivalent to steps 2-7 in the first embodiment or the second embodiment.

Example 6

Step 1: The first eNB determines that an inter-eNB handover operation needs to be performed according to the measurement report of the UE and the RRM information of the network, and further, the first eNB determines that the second eNB allows the SCG dual connection operation;

Step 2: When the cells in the one or more target SCGs belong to the CSG cell, and the CSG cells in the target SCG support the close mode, the subsequent steps are equivalent to the second to seventh steps in Embodiment 3 or Embodiment 4.

Example 7

Step 1: The first eNB determines that an inter-eNB handover operation needs to be performed according to the measurement report of the UE and the radio resource management (RRM) information of the network, and further, the first eNB determines an operation that may need to be replaced by the SCG;

Step 2: When one or more target SCGs belong to a home evolved base station (HeNB) cell in an open mode or another small cell that may have a PCI collision, in addition, the first eNB obtains the UE through measurement reporting or other manner. Regarding the ECGI information of the cell in the target SCG, the first eNB notifies the second eNB of the ECGI information of the cell in the target SCG through the handover request message;

Specifically, the first eNB may use the newly added AP IE to carry the ECGI information of the cell in the target SCG in step 2 of this embodiment, and notify the second eNB by using a handover request message.

Step 3: The second eNB determines, according to the received handover request information (including the ECGI information of the cell in the target SCG), whether the dual-connection operation can be performed on the related cell (the cell in the target SCG) in step 2 of this embodiment. ;

Step 4: If the target SCG selected by the second eNB includes the above-mentioned open mode home evolved base station (HeNB) cell or other Small Cell that may have a PCI collision, the second eNB according to the ECGI information of the cell in the target SCG, Initiating a dual connection setup operation to the target SCG;

Example 8

Specifically, the first eNB may carry the ECGI information of the cell in the target SCG in step 2 of this embodiment in an RRC container manner, and notify the second eNB by using a handover request message.

The subsequent steps are equivalent to steps three to seven in the seventh embodiment.

The device corresponding to the above method will be described below.

Referring to FIG. 7, an apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

The first unit 11 is configured to: when it is determined that the UE needs to perform handover between the first base station and the second base station, and the cell in the target secondary cell group SCG of the handover is a closed user group CSG cell, Determining CSG cell information of the target SCG;

The second unit 12 is configured to, at the first base station side, notify the second base station of CSG cell information of the target SCG.

Preferably, the CSG cell supports a hybrid hybrid mode or a closed close mode.

Referring to FIG. 8, a second apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

The third unit 21 is configured to acquire, on the second base station side, closed subscriber group CSG cell information of the target secondary cell group SCG sent by the first base station, where the first base station is an original base station that performs inter-base station handover of the UE, The second base station is a target base station for inter-base station handover, the target SCG is a target SCG for handover between the base stations, and a cell in the target SCG is a CSG cell;

The fourth unit 22 is configured to, on the second base station side, determine whether to initiate a dual connectivity establishment operation to the target SCG according to the CSG cell information of the target SCG.

Preferably, the CSG cell information of the target SCG includes: a CSG cell member of the target SCG. State information, and/or evolved universal terrestrial radio access network global cell identity ECGI, and/or CSG identification information.

Referring to FIG. 9, a third apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

The fifth unit 31 is configured to, on the first base station side, determine that handover of the UE between the first base station and the second base station is required, and the cell in the target secondary cell group SCG of the handover is an open mode home base station cell or a small cell, determining an evolved universal terrestrial radio access network global cell identity ECGI of the cell in the target SCG;

The sixth unit 32 is configured to, at the first base station side, notify an ECGI of a cell in the target SCG to the second base station.

Referring to FIG. 10, a fourth apparatus for implementing inter-base station handover of a user equipment UE according to an embodiment of the present invention includes:

The seventh unit 41 is configured to acquire, on the second base station side, an evolved universal terrestrial radio access network global cell identifier ECGI of the cell in the target secondary cell group SCG sent by the first base station, where the first base station is performing The original base station for inter-base station handover of the UE, the second base station is the target base station for handover between the base stations, and the target SCG is the target SCG for handover between the base stations;

The eighth unit 42 is configured to, on the second base station side, initiate a dual connectivity establishing operation to the cell in the target SCG according to the ECGI of the cell in the target SCG.

Preferably, the apparatus further comprises: the first unit 11 and the second unit 12, and/or the third unit 21 and the fourth unit 22, and/or the fifth unit 31 and the sixth unit 32.

It should be noted that any device provided in the embodiments of the present invention may be a base station, such as an eNB. Any of the units described can be implemented by a processor.

Referring to FIG. 11, a fifth apparatus for implementing inter-base station handover of a user equipment according to an embodiment of the present invention includes: a processor 500 and a memory 520;

When the device is used as the device on the original base station side of the inter-base station handover, the processor 500 is configured to read the memory 520. The program that performs the following process:

On the first base station side, the CSG cell information of the target SCG is notified to the second base station by the transceiver 510.

Preferably, the processor 500 specifically controls the transceiver 510 to notify the second base station of the CSG cell information of the target SCG by using a handover request message.

Preferably, the processor 500 specifically adopts the newly added application protocol AP information unit IE, or controls the transceiver 510 to send the CSG cell information of the target SCG by using a handover request message by using a radio resource to control the RRC container container. Notifying the second base station.

When the device is used as the device on the target base station side of the inter-base station handover, the processor 500 is further configured to read the program in the memory 520 and perform the following process:

The processor 500 determines to refuse to initiate a dual connection to the target SCG when the target SCG is a closed mode CSG cell and determines that the UE does not belong to a CSG cell according to the CSG cell member status information of the target SCG. Establish an operation.

Preferably, when the device is used as the device on the original base station side of the inter-base station handover, the processor 500 is further configured to read the program in the memory 520 and perform the following process:

On the first base station side, the control transceiver 510 notifies the ECGI of the cell in the target SCG to the second base station.

Preferably, the processor 500 specifically controls the transceiver 510 to notify the second base station of the ECGI of the cell in the target SCG by using a handover request message.

Preferably, the processor 500 specifically adopts a newly added application protocol AP information unit IE, or adopts In a manner in which the radio resource controls the RRC container container, the control transceiver 510 notifies the ECGI of the cell in the target SCG to the second base station by using a handover request message.

The transceiver 510 is configured to receive and transmit data under the control of the processor 500.

Wherein, in FIG. 11, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 500 and various circuits of memory represented by memory 520. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 510 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.

In summary, in the technical solution provided by the embodiment of the present invention, a large number of small cells are deployed at the same time under the coverage of the macro cell, and the UE may be connected in multiple cells or eNBs at the same time, and when the macro cell performs the handover operation, If the target SCG is a CSG cell or other Small Cell that may have a PCI conflict, by interacting with the CSG member status information or the ECGI information between the original eNB and the target eNB, it is possible to prevent the CSG cell from accessing the UE without the authority or causing the PCI conflict. Improve switching performance.

Those skilled in the art will appreciate that 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 invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. To implement the functions specified in one or more blocks of a flow or a flow and/or block diagram of a flowchart Device.

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.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A method for implementing inter-base station handover of a user equipment UE, characterized in that the method comprises:

Determining CSG cell information of the target SCG when the first base station determines that the UE needs to perform handover between the first base station and the second base station, and the cell in the target secondary cell group SCG of the handover is a closed user group CSG cell;

The first base station notifies the second base station of CSG cell information of the target SCG.
The method according to claim 1, wherein the first base station notifies the CSG cell information of the target SCG to the second base station by using a handover request message.
The method according to claim 2, wherein the first base station specifically adopts a newly added application protocol AP information unit IE, or uses a radio resource to control an RRC container container, and uses a handover request message to The CSG cell information of the target SCG is notified to the second base station.
The method according to claim 1, 2 or 3, wherein the CSG cell information of the target SCG comprises: CSG cell member status information of the target SCG, and/or an evolved universal terrestrial radio access network. Global Cell Identity ECGI, and/or CSG Identity Information.
The method according to claim 1, wherein the CSG cell supports a hybrid hybrid mode or a closed close mode.
A method for implementing inter-base station handover of a user equipment UE, characterized in that the method comprises:

The second base station acquires closed subscriber group CSG cell information of the target secondary cell group SCG sent by the first base station, where the first base station is an original base station that performs inter-base station handover of the UE, and the second base station is used to switch between the base stations. a target base station, the target SCG is a target SCG for handover between the base stations, and a cell in the target SCG is a CSG cell;

Determining, by the second base station, a dual connectivity setup operation to the target SCG according to the CSG cell information of the target SCG.
The method according to claim 6, wherein the CSG cell information of the target SCG comprises: CSG cell member status information of the target SCG, and/or an evolved universal terrestrial radio access network global cell identifier ECGI , and / or CSG identification information.
The method according to claim 7, wherein when the CSG cell information of the target SCG includes CSG cell member status information of the target SCG;

Determining, by the second base station, a dual connectivity establishment operation to the target SCG according to the CSG cell information of the target SCG, including:

And determining, by the second base station, that the target SCG is a CSG cell in a closed mode, and determining that the UE does not belong to a CSG cell according to CSG cell member status information of the target SCG, determining to refuse to initiate to the target SCG. Dual connection setup operation.
A method for implementing inter-base station handover of a user equipment UE, characterized in that the method comprises:

Determining, in the target SCG, when the first base station determines that the UE needs to perform handover between the first base station and the second base station, and the cell in the target secondary cell group SCG of the handover is an open mode home base station cell or a small cell Evolved universal terrestrial radio access network global cell identity ECGI;

The first base station notifies the second base station of an ECGI of a cell in the target SCG.
The method according to claim 9, wherein the first base station notifies the ECGI of the cell in the target SCG to the second base station by using a handover request message.
The method according to claim 10, wherein the first base station specifically adopts a newly added application protocol AP information unit IE, or adopts a method of controlling a RRC container container by using a radio resource, by using a handover request message The ECGI of the cell in the target SCG is notified to the second base station.
A method for implementing inter-base station handover of a user equipment UE, characterized in that the method comprises:

Obtaining, by the second base station, an evolved universal terrestrial radio access network global cell identifier ECGI of the cell in the target secondary cell group SCG sent by the first base station; where the first base station is an original base station performing inter-base station handover of the UE, where The second base station is a target base station for handover between the base stations, and the target SCG is a target SCG for handover between the base stations;

The second base station initiates a dual connectivity setup operation to a cell in the target SCG according to an ECGI of a cell in the target SCG.
An apparatus for implementing inter-base station handover of a user equipment UE, comprising:

a first unit, configured to determine, when determining, that the UE needs to perform handover between the first base station and the second base station, and the cell in the target secondary cell group SCG of the handover is a closed user group CSG cell, CSG cell information of the target SCG;

And a second unit, configured to, on the first base station side, notify the second base station of CSG cell information of the target SCG.
The apparatus according to claim 13, wherein the second unit notifies the second base station of CSG cell information of the target SCG by using a handover request message.
The apparatus according to claim 14, wherein the second unit specifically adopts a newly added application protocol AP information element IE, or adopts a method of controlling a RRC container container by using a radio resource, by using a handover request message. The CSG cell information of the target SCG is notified to the second base station.
The apparatus according to claim 13, 14 or 15, wherein the CSG cell information of the target SCG comprises: CSG cell member status information of the target SCG, and/or an evolved universal terrestrial radio access network. Global Cell Identity ECGI, and/or CSG Identity Information.
The apparatus according to claim 13, wherein the CSG cell supports a hybrid hybrid mode or a closed close mode.
An apparatus for implementing inter-base station handover of a user equipment UE, comprising:

a third unit, configured to acquire, on the second base station side, closed subscriber group CSG cell information of the target secondary cell group SCG sent by the first base station, where the first base station is an original base station that performs inter-base station handover of the UE, where The second base station is a target base station for handover between the base stations, the target SCG is a target SCG for handover between the base stations, and a cell in the target SCG is a CSG cell;

And a fourth unit, configured to, on the second base station side, determine whether to initiate a dual connectivity setup operation to the target SCG according to the CSG cell information of the target SCG.
The apparatus according to claim 18, wherein the CSG cell information of the target SCG comprises: CSG cell member status information of the target SCG, and/or an evolved universal terrestrial radio access network global cell identifier ECGI , and / or CSG identification information.
The apparatus according to claim 19, wherein when the CSG cell information of the target SCG includes CSG cell member status information of the target SCG;

The fourth unit is specifically configured to: when the target SCG is a CSG cell in a closed mode, and determine, according to the CSG cell member status information of the target SCG, that the UE does not belong to a CSG cell. The member decides to refuse to initiate a dual connection establishment operation to the target SCG.
Device according to claim 18, 19 or 20, characterized in that it further comprises a first unit and a second unit of the device according to any of claims 13-17.
An apparatus for implementing inter-base station handover of a user equipment UE, comprising:

a fifth unit, configured to, on the first base station side, determine that handover of the UE between the first base station and the second base station is required, and the cell in the target secondary cell group SCG of the handover is an open mode home base station cell or small Determining, by the cell, an evolved universal terrestrial radio access network global cell identity ECGI of the cell in the target SCG;

And a sixth unit, configured to, at the first base station side, notify an ECGI of a cell in the target SCG to the second base station.
The apparatus according to claim 22, wherein the sixth unit notifies the second base station of an ECGI of a cell in the target SCG by using a handover request message.
The device according to claim 23, wherein the sixth unit specifically adopts a newly added application protocol AP information unit IE, or uses a radio resource to control an RRC container container, by switching a request message The ECGI of the cell in the target SCG is notified to the second base station.
Device according to claim 22, 23 or 24, characterized in that it further comprises a first unit and a second unit of the device according to any of claims 13-17, and/or claims 18-20 The third unit and the fourth unit of the apparatus of any of the preceding claims.
An apparatus for implementing inter-base station handover of a user equipment UE, comprising:

a seventh unit, configured to acquire, on the second base station side, an evolved universal terrestrial radio access network global cell identifier ECGI of a cell in the target secondary cell group SCG sent by the first base station, where the first base station is a UE Base station The original base station for handover, the second base station is a target base station for handover between the base stations, and the target SCG is a target SCG for handover between the base stations;

And an eighth unit, configured to, on the second base station side, initiate a dual connectivity setup operation to the cell in the target SCG according to an ECGI of the cell in the target SCG.
The device according to claim 26, characterized in that the device further comprises: the first unit and the second unit of the device according to any of claims 13-17, and/or claims 18-20 The third unit and the fourth unit of the apparatus of any of the claims, and/or the fifth unit and the sixth unit of the apparatus of any of claims 22-24.