WO2017128704A1

WO2017128704A1 - Method, terminal, and base station for establishing unicast bearer

Info

Publication number: WO2017128704A1
Application number: PCT/CN2016/096052
Authority: WO
Inventors: 吴昱民
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-01-29
Filing date: 2016-08-19
Publication date: 2017-08-03
Also published as: CN107027103A

Abstract

Disclosed in the embodiments of the present invention are a method, terminal, and base station for establishing a unicast bearer, said method comprising: according to unicast-bearer establishment conditions issued by a network-side configuration, or unicast-bearer establishment conditions prescribed by the network side and a user equipment (UE) protocol, the UE detecting that a target cell to which handover is to be made does not provide, by means of broadcast or multicast, a service that interests said UE; according to said unicast-bearer establishment conditions, said UE initiating unicast bearer establishment.

Description

Method, terminal and base station for establishing unicast bearer

Technical field

The embodiments of the present invention relate to, but are not limited to, a wireless communication technology, and in particular, to a method, a terminal, and a base station for establishing a unicast bearer.

Background technique

At present, the Multimedia Broadcast Multicast Service (MBMS) is mainly implemented by a hybrid cell, that is, a cell that transmits an MBMS service, in addition to transmitting an MBMS service, and also capable of transmitting a unicast service. The MBMS service needs to ensure the continuity of the MBMS service. The continuity of the MBMS service is to assist the user equipment (UE) in a Multicast/Multicast Single Frequency Network (MBSFN). Continuous reception of MBMS services. For a UE that does not have a service continuity function, it needs to acquire the MTCH configuration information of the cell through the MCCH of the target cell (such as the neighboring cell adjacent to the current cell) in the RRC_IDLE and RRC_CONNECTED states, and pass the MCCH in the MCCH. The MBMS service configuration information, the UE knows whether the MBMS service it is interested in is in the target cell (such as a neighboring cell adjacent to the current cell). Therefore, in order to be able to continuously receive the MBMS service, the UE needs to read the MBMS-related system information and the MCCH information at the adjacent frequency point during the mobile process.

In the case of the SC-PTM technology, when the MBMS service is transmitted in a single cell, in order to improve the efficiency of resource utilization, the MBMS service is dynamically scheduled in a physical downlink shared channel (PDSCH, Physical Downlink Shared Channel) for unicast communication. ) in the send. Although the unicast bearer mode satisfies the improvement of resource utilization, the handover delay is increased, especially when the UE switches from the cell receiving the broadcast service to the cell of the non-broadcast service, or when reselecting to the cell of the non-broadcast service. The unicast bearer can be established in the target cell (such as the neighboring cell adjacent to the current cell) after reading the MBMS-related system information and the MCCH information of the cell to be switched, thereby causing a larger delay.

Summary of the invention

The embodiments of the present invention are intended to provide a method, a terminal, and a base station for establishing a unicast bearer, and at least solve the problems of the related art.

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The technical solution of the embodiment of the present invention is implemented as follows:

A method for establishing a unicast bearer according to an embodiment of the present invention, where the method includes:

The user equipment UE detects that the target cell to be handed over does not provide the UE interested in broadcasting or multicasting according to the unicast bearer establishment condition delivered by the network side or the unicast bearer establishment condition agreed by the network side and the UE protocol. business;

The UE initiates unicast bearer setup according to the unicast bearer setup condition.

In the foregoing solution, the unicast bearer establishment condition is a condition that is generated by the unicast bearer that is triggered by the UE to establish a service of interest.

In the above solution, the unicast bearer establishment condition includes at least one of the following contents:

The unicast bearer establishment is triggered when receiving a handover command to switch to the target cell;

And triggering the unicast bearer establishment when receiving a handover command to switch to the target cell and accessing the target cell;

The unicast bearer establishment is triggered when the measurement configuration of the target cell is received by the network side;

The unicast bearer establishment is triggered when the measurement reporting for the target cell is triggered;

The unicast bearer establishment is triggered after receiving the measurement configuration of the target cell and triggering the measurement report at any time point or the agreed time point;

The unicast bearer establishment is triggered at any time point or an agreed time point after detecting that the target cell does not provide the UE interested service by broadcasting or multicasting;

After receiving the measurement configuration of the target cell by the network side, and before the measurement reporting trigger condition is reached, if the signal strength or signal quality of the target cell measured by the UE is a preset ratio of the trigger condition, then the In the case of the preset ratio, the unicast bearer establishment is triggered;

After the cell reselection condition to the target cell is met, the unicast bearer is triggered to be established;

After the cell reselection condition of the target cell is met, the unicast bearer is triggered to be established at any time before the actual reselection to the cell;

The unicast bearer establishment is triggered after the actual reselection to the target cell;

If the signal strength or signal quality of the target cell measured by the UE is a preset ratio of the reselection condition before the cell reselection condition of the target cell is reached, the ticket is triggered if the preset ratio is met. Broadcast bearer establishment.

In the above solution, the method further includes:

After the UE meets the unicast bearer triggering condition of the corresponding service, the UE triggers the establishment of the unicast bearer corresponding to the service of interest according to the configuration information.

In the foregoing solution, the configuration information is carried by the notification message, and the information content that is carried includes at least one of a target cell identifier, a target cell frequency point identifier, a target cell, and a service identifier of a broadcast MBMS that is not provided by the target frequency point.

In the above solution, the method further includes:

If the configuration information is the target cell identifier or the target frequency point identifier, and the UE determines that the target cell or the target frequency point does not provide the service that is of interest to the UE, the UE triggers the unicast bearer of the service that is interested in the UE. Established; or,

If the configuration information is the service identifier of the broadcast MBMS that is not provided by the target cell or the target frequency point, the UE directly triggers the unicast bearer establishment of the service that is interested in the UE.

The network side receives the interest service reported by the user equipment UE;

When the network side triggers a handover process of the UE to the target cell, detecting that the target cell to be handed over does not provide a service that is interested in the UE by broadcasting or multicasting;

The network side triggers the establishment of the unicast bearer of the UE according to the unicast bearer establishment condition.

In the above solution, the unicast bearer setup condition is a unicast bearer setup condition that is configured on the network side and delivered to the UE, or a unicast bearer setup condition agreed by the network side and the UE protocol.

In the above solution, the method further includes:

Determining, by the network side, whether to trigger a handover process of the UE to the designated target cell, and if so, Determining that the unicast bearer setup procedure of the UE is triggered according to the unicast bearer setup condition, and the unicast bearer setup of the UE is triggered; or the configuration information is sent by the network side to the UE, and the UE is triggered. Unicast bearer establishment.

In the foregoing solution, the configuration information includes at least one of a target cell identifier, a target cell frequency point identifier, a target cell, and a service identifier of a broadcast service that is not provided by the target frequency point.

In the above solution, the network side includes an enhanced base station eNB.

A terminal according to an embodiment of the present invention, where the terminal includes:

The first detecting unit is configured to establish a condition according to a unicast bearer established by the network side, or a unicast bearer establishment condition agreed by the network side and the terminal protocol, and detect that the target cell to be switched does not pass the broadcast or Broadcast to provide services of interest to the terminal;

The first bearer establishing unit is configured to initiate unicast bearer setup according to the unicast bearer setup condition.

In the above solution, the unicast bearer establishment condition is a condition that is generated by the terminal triggering the unicast bearer of the service of interest.

And triggering the unicast bearer establishment when receiving a handover command to switch to the target cell and successfully accessing the target cell;

The unicast bearer establishment is triggered after receiving the measurement configuration of the target cell and triggering any time point before the measurement report or the agreed time point;

The unicast bearer setup is triggered when it is detected that the target cell does not provide the terminal interested in the service by broadcasting or multicasting;

After receiving the measurement configuration of the target cell on the network side, and before the measurement reporting trigger condition is reached, if the signal strength or signal quality of the target cell measured by the terminal is a preset ratio of the trigger condition, then the The unicast bearer establishment is triggered when the preset ratio is described;

The unicast bearer establishment is triggered after the cell reselection condition of the target cell is met;

After the cell reselection condition of the target cell is met, the unicast bearer establishment is triggered at any time point before the actual reselection to the cell;

Before the cell reselection condition of the target cell is not reached, if the signal strength or signal quality of the target cell measured by the terminal is a preset ratio of the reselection condition, triggering if the preset ratio is met The unicast bearer is established.

In the above solution, the terminal further includes:

The first notification unit is configured to trigger the unicast bearer corresponding to the service of interest according to the configuration information after the terminal satisfies the unicast bearer triggering condition of the corresponding service.

In the foregoing solution, the first notification unit is further configured to: carry the configuration information by using a notification message, where the information content that is carried includes: a target cell identifier, a target cell frequency point identifier, a target cell, and a broadcast that is not provided by the target frequency point. At least one of the MBMS service identifiers.

In the foregoing solution, the first bearer establishing unit is further configured to:

Determining that the configuration information is the target cell identifier or the target cell frequency point identifier, and determining that the target cell or the target frequency point does not provide the service that is interested in the terminal, triggering unicast of the service interested in the terminal Bearer establishment; or,

Determining that the configuration information is a service identifier of a broadcast MBMS that is not provided by the target cell or the target frequency point, and directly triggers unicast bearer establishment of a service that is interested in the terminal.

A base station according to an embodiment of the present invention, where the base station includes:

a second receiving unit, configured to receive the service of interest reported by the user equipment UE;

a second detecting unit, configured to: when the base station triggers a handover process of the UE to the target cell, detecting that the target cell to be handed over does not provide a service that is interested in the UE by using broadcast or multicast;

The second bearer establishing unit is configured to trigger the unicast bearer establishment of the UE according to the unicast bearer establishment condition.

In the above solution, the unicast bearer establishment condition is a single configuration of the base station and sent to the UE. The unicast bearer establishment condition of the broadcast bearer establishment condition or the base station and the UE protocol is agreed.

In the above solution, the base station further includes:

a second trigger determining unit, configured to determine whether to trigger a handover process of the UE to the specified target cell, and if yes, determining that the unicast bearer setup process of the UE is triggered according to the unicast bearer setup condition, and triggering the UE The unicast bearer is established; or the configuration information is sent to the UE, and the unicast bearer establishment of the UE is triggered.

In the above solution, the base station includes an enhanced base station eNB.

The method for establishing a unicast bearer according to the embodiment of the present invention includes: the UE detects the unicast bearer setup condition delivered by the network side, or the unicast bearer setup condition agreed by the network side and the UE protocol, and detects the target cell to be handed over to the target cell. The UE is not provided with the service of interest to the UE by broadcast or multicast; the UE initiates unicast bearer setup according to the unicast bearer setup condition. With the embodiment of the present invention, when the UE switches or reselects the cell to the non-broadcast service from the cell receiving the broadcast service, the UE can establish the unicast bearer earlier, thereby reducing the delay of the UE switching between the multicast reception and the unicast reception. Time.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

1 is a schematic diagram of an existing MBMS service architecture;

2 is a schematic diagram of signaling interaction between a multicast service and a unicast service by the existing network side according to the interest information reported by the UE and the capability of the UE;

3 is a schematic flowchart of a method implementation according to an embodiment of the present invention;

4 is a schematic flowchart of a method 2 implementation according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a connection state UE triggering bearer establishment according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram of an idle state UE triggering bearer setup according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic diagram of an eNB triggering bearer setup according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention.

Embodiments of the invention

The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings.

The scheme for establishing a unicast bearer in the embodiment of the present invention can be applied to an MBMS scenario.

Firstly, the various application scenarios and technical terms involved in establishing bearer (including unicast bearer establishment) are introduced as follows:

Taking the Long Term Evolution (LTE) system as an example, MBMS in LTE is also called enhanced multimedia broadcast multicast service (eMBMS, evolved MBMS), and its main function is to implement broadcast and multicast services in the LTE system. Currently, MBMS is mainly implemented by a hybrid cell, that is, a cell that transmits an MBMS service also transmits a unicast service. The multiple MBMS cells can form a Multicast/Multicast Single Frequency Network (MBSFN) area, and broadcast the same MBMS service in the same MBSFN, and the MBMS service is physically multicast through the air interface. The channel (PMCH, Physical Multicast Channel) is transmitted in the MBSFN subframe. Hereinafter, a terminal (UE) capable of receiving an MBMS service in an MBSFN subframe through a PMCH is a UE having an MBMS receiving capability. The data of the MBMS service is transmitted from the MBMS GW to the eNB through the M1 interface. The MBMS control plane signaling is sent through an M3 interface between a Mobility Management Entity (MME) and a Multi-cell/Multicast Coordination Entity (MCE), and an M2 interface between the MCE and the eNB. . The bearer that receives the service by the UE in the broadcast mode is called the MBMS Point to Multipoint Radio Bearer. The bearer that receives the service in the unicast mode is called the unicast bearer uncast bearer or the data radio bearer (DRB). . The MBMS service identifier includes: TMGI (Temporary Mobile Group Identity); session ID (Session ID); service area identifier (SAI, Service Area Identity); multicast traffic channel identifier (MTCH ID, Multicast Traffic Channel ID) Wait. MBMS A system architecture is shown in Figure 1. In Figure 1, the MBMS GW is an MBMS gateway; the MCE is a multi-cell/multicast coordination entity; the eNB is an enhanced base station; M1 is a user plane interface; and M2 is an E-UTRAN internal control plane interface. ; M3 is the interface between E-UTRAN and EPC.

In terms of eMBMS related control information, including:

(1) System information: The SIB13 broadcasts the basic configuration information of each MBSFN to which the current cell belongs, including the configuration of the logical control channel MCCH corresponding to each MBSFN, and the configuration of the MCCH change notification. For example, SIB15 and SIB15 broadcast information related to MBMS service continuity, and the SAI information corresponding to each MBMS frequency point (including the current cell frequency point and the adjacent frequency point) is given. It is used to assist the RRC_IDLE and RRC_CONNECTED UEs to find the MBMS frequency point of interest, thereby ensuring continuous reception of the MBMS service during the mobile process. For RRC_IDLE, the MBMS frequency point of interest to the SIB 15 may be set to a high priority frequency point in order to receive the MBMS service.

(2) Logical channel: For example, the Multicast Control Channel (MCCH) is a point-to-multipoint downlink channel used by the network to transmit MBMS-related control information to the UE and used for statistics. For the counting information of the MBMS service interest, one MCCH may correspond to one or more MTCHs; the channel can be used only by the UE that can receive the MBMS service. The base station will notify the UE of the modification period and the repetition period of the MCCH through the system broadcast. The modification period is generally X times the repetition period. In a modification period, the MCCH information sent in all repetition periods is the same, which is to ensure the reliability of the MCCH. receive. At the same time, the change of information in the MCCH is indicated by a bit that is scrambled by the M-RNTI (Multicast-Radio Network Temporary Identity) in the PDCCH (Physical Downlink Control Channel). After obtaining the MCCH change notification, the UE needs to re-read the MCCH.

(3) MAC scheduling control of eMBMS: such as MCH Scheduling Information (MSI, Control Element). The MSI is used as control signaling of the MAC layer and is transmitted in the first subframe of each MSP (MCH Scheduling Period) for indicating the location of each MTCH and the subframes that are not used in the current MCH.

(4) A logical channel, such as a multicast traffic channel (MTCH), is a point-to-multipoint downlink channel used by the network to transmit MBMS service data to the UE; the channel can only be used by the UE that can receive the MBMS service. . MTCH configuration information is corresponding to it MCCH indicated. The network uses the MCCH to indicate the MTCH to the UE, thereby achieving the purpose of enabling the UE to receive the MBMS service carried on the MTCH.

(5) Transport channels, such as Multicast Channel (MCH) and Physical Channel (PMCH): Both MCCH and MTCH are mapped to the MCH for transmission, and the MCH is mapped to the PMCH for transmission. Each MCH is transmitted in one MCH scheduling period, and the scheduling period of the MCH is MSP (MCH Scheduling Period).

In terms of MBMS service continuity, the UE's MBMS service continuity procedure is to assist the UE to continuously receive MBMS services within one MBSFN. For a UE that does not have a service continuity function, it needs to acquire the MTCH configuration information of the cell through the MCCH of the target cell (such as the neighboring cell adjacent to the current cell) in the RRC_IDLE and RRC_CONNECTED states, and pass the MCCH in the MCCH. The MBMS service configuration information, the UE knows whether the MBMS service it is interested in is in the target cell (such as a neighboring cell adjacent to the current cell). Therefore, in order to be able to continuously receive the MBMS service, the UE needs to read the MBMS-related system information and the MCCH information at the adjacent frequency point during the mobile process. In order to prevent the UE from reading the MBMS-related system information and the MCCH information on the adjacent frequency point, the UE can know which frequency points are providing related MBMS services through the combination of the following MBMS auxiliary information, including the following contents:

1) User Service Description (USD): This information is obtained by the UE at the application layer. The USD provides the identifier (TM) (Temporary Mobile Group Identity) corresponding to each MBMS service, and the session start time and end time of the service. The service frequency information of the service and the MBMS SAI (Service Area Identity) corresponding to the service. The MBMS SAI is used to indicate the service area MBMS SA (Service Area) to which the MBMS service belongs, and the MBMS services broadcasted in the same MBMS service area are the same;

2) System information: The network broadcasts the MBMS SAI corresponding to the current cell frequency point and its adjacent frequency point in the MBMS cell and the non-MBMS cell through the system information SIB15.

The MBMS SAI information between neighboring eNBs is acquired and maintained through an X2 signaling procedure (including an X2 setup procedure and an eNB configuration update procedure) or an OAM procedure. After the UE obtains the USD information by downloading from the application layer or the like, and obtains the SIB 15 of the current cell by reading the system information, the UE can find the frequency point of interest by matching the information in the USD and the SIB 15. After the UE finds the frequency point corresponding to the MBMS service of interest, the UE needs to ensure the interest during the movement. The reception of the MBMS service requires a differentiated adjustment and correction of the mobility procedures of the UEs of RRC_IDLE and RRC_CONNECTED.

For the MBMS UE in the RRC_IDLE state, in order to ensure continuous reception of the MBMS service, the process of cell reselection has the following requirements. The UE can only set the frequency to the highest priority when the UE is only interested in or accepting the MBMS service, and the UE can only receive the MBMS service of interest by camping at a certain frequency.

For the MBMS UE in the RRC_CONNECTED state, since the mobility process of the UE is controlled by the network side, in order to ensure continuous reception of the MBMS service, the network side needs to inform the UE through the broadcast SIB 15 that it supports the continuity function of the MBMS service of the UE in the RRC_CONNECTED state. , and the reporting of MBMS interest messages. After the UE knows that the network side supports the continuity function of the MBMS service of the UE in the RRC_CONNECTED state, if the UE is interested in the MBMS service and needs to ensure continuous reception of the MBMS service, the UE is notified of the MBMS interest by the RRC signaling, and the network side The interest information reported by the UE and the capability of the UE ensure that the UE can receive the multicast service and the unicast service as much as possible, and the signaling process is as shown in FIG. 2 . The interest message MBMSInterestIndication includes frequency point information of interest to the UE, and priority information received by the UE for the unicast and multicast services. As shown in FIG. 2, the system information block 5 refers to SystemInformationBlock 15.

For a UE with carrier aggregation capability, the UE can perform unicast service transmission and reception at multiple frequency points at the same time. Therefore, the UE also needs to be able to receive the MBMS service at multiple frequency points, and the frequency of receiving the MBMS service does not need to be the service frequency of the UE. For the idle state (IDLE) UE, the service frequency is the UE. The frequency of the service is the working frequency of the network configured for the UE for the CONNECTED UE. When the UE finds that the MBMS frequency point of interest is not its service frequency, the UE needs to be able to configure the non-serving frequency point to receive the MBMS service.

Interest in the MBMS service indicates that the UE is ready to receive or is receiving the MBMS service.

In the case of the SC-PTM technology, when the MBMS service is transmitted in a single cell, in order to improve the efficiency of resource utilization, the MBMS service is dynamically scheduled in a physical downlink shared channel (PDSCH, Physical Downlink Shared Channel) for unicast communication. ) in the send. The SC-PTM transmission still requires a corresponding control channel (such as SC-MCCH, Single Cell MCCH) and a data channel (such as SC-MTCH, Single Cell MTCH). The following is said to be able to pass the PDSCH in a unicast subframe. The UE that receives the MBMS service is a UE that has SC-PTM reception capability.

The transmission mode (abbreviated as broadcast) of the MBMS and the transmission mode (referred to as multicast) of the SC-PTM may be collectively referred to as being transmitted by broadcast. The service sent can be the same MBMS service.

In the present MBMS scenario, the unicast bearer mode satisfies the improvement of resource utilization, but increases the handover delay, especially when the UE switches or reselects the cell from the receiving broadcast service to the non-broadcast service cell. The MBMS-related system information and the MCCH information of the cell to be switched need to be read before the unicast bearer can be established in the target cell (such as the neighboring cell adjacent to the current cell), thereby causing a larger delay.

The embodiment of the invention provides the following method for establishing a unicast bearer, which includes the following contents:

Method 1: A scheme for establishing a unicast bearer by the UE.

As shown in FIG. 3, the bearer establishment method of the embodiment of the present invention includes the following steps:

Step 101: The UE establishes a condition for the unicast bearer established by the network side, or a unicast bearer establishment condition agreed by the network side and the UE, and detects that the target cell to be switched does not provide the UE by broadcast or multicast. Interested business;

Step 102: The UE initiates unicast bearer establishment according to the unicast bearer establishment condition.

Here, the unicast bearer establishment condition is a condition that the UE triggers the unicast bearer that establishes the interest service to generate.

Here, the unicast bearer setup condition delivered by the network side configuration or the unicast bearer setup condition agreed by the network side and the UE protocol is obtained, and the unicast bearer setup is initiated by the UE according to the unicast bearer setup condition, and the unicast is established. The bearer establishment condition includes at least one of the following contents:

A1: triggering the establishment of the unicast bearer when receiving a handover command to switch to a cell;

A2. The unicast bearer establishment is triggered when the handover command is switched to the cell and the cell is successfully accessed.

A3. The unicast bearer establishment is triggered when the measurement configuration of the cell is received by the network side.

A4. triggering the unicast bearer establishment when triggering measurement reporting for a cell;

A5. Any time point or agreement before receiving the measurement configuration of a certain cell and triggering the measurement report At the time point, triggering the unicast bearer establishment;

A6. triggering the establishment of the unicast bearer after detecting that the target cell (such as a neighboring cell adjacent to the current cell) does not provide any time point or agreed time point after the broadcast of the broadcast service of interest is broadcast or multicast. ;

A7. After receiving the measurement configuration of the cell on the network side, and before the measurement reporting trigger condition is met, if the signal strength or signal quality of the cell measured by the UE is a certain ratio of the trigger condition, then the Triggering the unicast bearer establishment in a preset ratio;

A8. After the cell reselection condition of the cell is met, the unicast bearer is triggered to be established.

After the cell reselection condition of the cell is satisfied, the unicast bearer is triggered to be established at any time before the actual reselection to the cell;

A10. After the actual reselection to the cell, the unicast bearer is triggered to be established.

A11. Before the cell reselection condition of the cell is met, if the signal strength or signal quality of the cell measured by the UE is a certain ratio of the reselection condition, the trigger is performed if the preset ratio is met. Said unicast bearer establishment;

A12, other conditions.

In an embodiment of the present invention, after the UE meets the unicast bearer triggering condition of the corresponding service, the UE notifies the high-level entity by using the notification message, and the high-layer entity triggers the establishment of the unicast bearer corresponding to the service of interest according to the configuration information. .

In an embodiment of the present invention, the configuration information is carried by the notification message, and the information content that is carried includes: the target cell identifier, the target cell frequency point identifier, the target cell, and the service of the broadcast MBMS service that is not provided by the target frequency point. At least one of the logos.

In an embodiment of the embodiment of the present invention, the method further includes:

If the configuration information is the service identifier of the broadcast MBMS service that is not provided by the target cell or the target frequency point, the UE directly triggers the unicast bearer establishment of the service that is interested in the UE.

In an embodiment of the present invention, the information content of the notification message that informs the high-layer entity includes: an MBMS service identifier that is not broadcasted; a target cell identifier that does not broadcast the MBMS service; a target frequency point identifier that does not broadcast the MBMS service; and other information.

In an embodiment of the present invention, the UE high-level entity triggers the establishment of a unicast bearer corresponding to the service of interest.

Method 2: A scheme for establishing a unicast bearer by a base station (such as an eNB).

As shown in FIG. 4, the bearer establishment method of the embodiment of the present invention includes the following steps:

Step 201: The network side receives the interest service reported by the user equipment (UE).

Step 202: When the network side triggers a handover process of the UE to the target cell, detecting that the target cell to be handed over does not provide the service that is interested in the UE by broadcasting or multicasting;

Step 203: The network side triggers establishment of a unicast bearer of the UE according to the unicast bearer establishment condition.

Here, the unicast bearer establishment condition is: a unicast bearer establishment condition that is configured and sent to the UE by the network side, or a unicast bearer establishment condition agreed by the network side and the UE protocol.

In an embodiment of the present invention, the network side determines whether to trigger a handover process of the UE to the designated target cell, and if yes, determines that the unicast bearer establishment of the UE is triggered according to the unicast bearer establishment condition. And triggering the unicast bearer establishment of the UE; or sending configuration information to the UE by the network side, triggering unicast bearer establishment of the UE.

In a specific implementation of the determining process, the network side is specifically an eNB. After the eNB receives the service interest reported by the UE, if the eNB wants to trigger the handover process of the UE to a target cell (such as a neighboring cell adjacent to the current cell), If the target cell (such as the neighboring cell adjacent to the current cell) does not broadcast the service that is of interest to the UE, the eNB determines to trigger the unicast bearer establishment process of the UE.

In a specific implementation of the configuration information, the configuration information may include: at least one of a target cell identifier, a target cell frequency point identifier, a target cell, and a service identifier of a broadcast service that is not provided by the target frequency point.

In an embodiment of the present invention, the UE notifies the high-layer entity to trigger the establishment of the unicast bearer according to the configuration information delivered by the eNB.

In an embodiment of the present invention, if the configuration information sent by the eNB is the target cell identifier or the target frequency point identifier, and the UE determines that the target cell or the target frequency point does not provide the UE interested. For services, the UE triggers the establishment of unicast bearers for these interested services. If the transmitted configuration information is a service identifier of a broadcast service that is not provided by the target cell or the target frequency point, the UE directly triggers establishment of the unicast bearer of the services of interest.

In an embodiment of the present invention, the information content of the high-level entity is notified: the MBMS service identifier that is not broadcasted; the target cell identifier that does not broadcast the MBMS service; the target frequency point identifier that does not broadcast the MBMS service; and other information.

With the above two technical solutions of the embodiments of the present invention, when the network side (such as the base station eNB) or the UE side detects that the target cell (such as the neighboring cell adjacent to the current cell) has no broadcast service, the unicast bearer is triggered. If the UE switches or reselects the cell to the non-broadcast service from the cell receiving the broadcast service, the unicast bearer can be established earlier, thereby reducing the delay of the UE switching between the multicast reception and the unicast reception.

A terminal of the embodiment of the present invention, as shown in FIG. 8, the terminal 80 includes:

The first detecting unit 801 is configured to detect a unicast bearer setup condition delivered by the network side, or a unicast bearer setup condition agreed by the network side and the terminal protocol, and detect a target cell to be handed over (eg, with the current cell) The neighboring neighboring cell does not provide the service of interest to the terminal by broadcasting or multicasting;

The first bearer establishing unit 802 is configured to initiate unicast bearer setup according to the unicast bearer setup condition.

In an embodiment of the present invention, the unicast bearer establishment condition is a condition that is generated by the terminal triggering the unicast bearer of the service of interest.

In an embodiment of the embodiment of the present invention, the unicast bearer establishment condition includes at least one of the following contents:

The unicast bearer establishment is triggered when receiving a handover command to switch to a target cell (such as a neighboring cell adjacent to the current cell);

Triggering the unicast bearer when receiving a handover command to switch to a target cell (such as a neighboring cell adjacent to the current cell) and successfully accessing the target cell (such as a neighboring cell adjacent to the current cell) set up;

The unicast bearer establishment is triggered when the measurement configuration of the target cell (such as a neighboring cell adjacent to the current cell) is received by the network side;

Triggering the unicast bearer establishment when the measurement reporting of the target cell (such as the neighboring cell adjacent to the current cell) is triggered;

The unicast bearer is triggered after receiving the measurement configuration of the target cell (such as the neighboring cell adjacent to the current cell) and the arbitrary time point or the agreed time point before the triggering of the measurement report;

The unicast bearer setup is triggered when it is detected that the target cell (such as the neighboring cell adjacent to the current cell) does not provide any time point or agreed time point after the terminal is interested in the service by broadcasting or multicasting;

After receiving the measurement configuration of the target cell (such as the neighboring cell adjacent to the current cell), and before reaching the measurement reporting trigger condition, if the target cell measured by the terminal (such as adjacent to the current cell) The signal strength or the signal quality of the neighboring cell is a preset ratio of the triggering condition, and the unicast bearer establishment is triggered if the preset ratio is met;

The unicast bearer establishment is triggered after the cell reselection condition of the target cell (such as the neighboring cell adjacent to the current cell) is met;

After the cell reselection condition of the target cell (such as the neighboring cell adjacent to the current cell) is satisfied, the unicast bearer is triggered to be established at any time before the cell is actually reselected to the cell;

The unicast bearer is triggered after the actual reselection to the target cell (such as the neighboring cell adjacent to the current cell);

Before the cell reselection condition of the target cell (such as the neighboring cell adjacent to the current cell) is not reached, if the signal strength or signal quality of the target cell (such as the neighboring cell adjacent to the current cell) measured by the terminal is The preset ratio of the reselection condition triggers the unicast bearer establishment if the preset ratio is satisfied.

In an embodiment of the embodiment of the present invention, the terminal further includes:

In an embodiment of the embodiment of the present invention, the first notification unit is further configured to: The information is carried by the notification message, and the information content includes at least one of a target cell identifier, a target cell frequency point identifier, a target cell, and a service identifier of a broadcast MBMS that is not provided by the target frequency point.

In an embodiment of the embodiment of the present invention, the first bearer establishing unit is further configured to:

Determining that the configuration information is the target cell identifier or the target cell frequency point identifier, and determining that the target cell or the target frequency point does not provide the service of interest to the terminal, triggering the unicast bearer establishment of the service interested in the terminal ;or,

A base station according to an embodiment of the present invention, as shown in FIG. 9, the base station 90 includes:

The second receiving unit 901 is configured to receive the service of interest reported by the user equipment UE;

The second detecting unit 902 is configured to detect, when the base station triggers a handover process of the UE to the target cell (such as a neighboring cell adjacent to the current cell), to detect the target cell to be handed over (eg, adjacent to the current cell) The neighboring cell) does not provide the service of interest to the UE by broadcasting or multicasting;

The second bearer establishing unit 903 is configured to trigger the unicast bearer establishment of the UE according to the unicast bearer establishment condition.

In an embodiment of the present invention, the unicast bearer establishment condition is a unicast bearer establishment condition configured by the base station and delivered to the UE, or a unicast bearer establishment condition agreed by the base station and the UE protocol.

In an embodiment of the embodiment of the present invention, the base station further includes:

The second trigger determining unit is configured to determine whether to trigger a handover process of the UE to the designated target cell (such as a neighboring cell adjacent to the current cell), and if yes, determine that the UE needs to be triggered according to the unicast bearer establishment condition. The unicast bearer setup process is triggered, and the unicast bearer setup of the UE is triggered; or the configuration information is sent to the UE, and the unicast bearer setup of the UE is triggered.

In an embodiment of the present invention, the configuration information includes: at least one of a target cell identifier, a target cell frequency point identifier, a target cell, and a service identifier of a broadcast service that is not provided by the target frequency point.

In an embodiment of the embodiments of the present invention, the base station includes an enhanced base station eNB.

The embodiment of the present invention is described as an example of a practical application scenario as follows:

This application scenario relates to the case where a unicast bearer is established when a user switches from a cell that is transmitted from a single cell point to a multipoint (SC-PTM) to a cell that is not transmitted by the SC-PTM in the LTE system.

This application scenario adopts the technical solution corresponding to the method in the foregoing embodiment of the present invention, and has the following embodiments:

Application Embodiment 1: As shown in FIG. 5, the connected UE triggers, and the target cell may be a neighboring cell adjacent to the current cell. In this case, the process of initiating the unicast bearer establishment includes the following steps:

Step 301: The network side configuration (such as by system message or dedicated signaling) or protocol stipulates that the condition that the connected UE triggers the unicast bearer establishment of the service of interest is as follows (including any combination of the following conditions), including:

C1, receiving a handover command to switch to a certain cell (such as at any time t3 or later in FIG. 5);

C2, receiving a handover command to switch to a cell and successfully accessing the cell (as in any time at t5 or later in FIG. 5);

C3. Receive a measurement configuration of a cell on the network side (as shown in FIG. 5 at any time after t2 or later);

C4, triggering measurement reporting for a certain cell (as shown in FIG. 5 at any time after t3 or later);

C5. After receiving the measurement configuration of a certain cell and any time point before the triggering measurement report or the agreed time point (as shown in FIG. 5 at any time between t2 and t3);

C6. At any time point or agreed time point after detecting that the target cell does not provide the broadcast of the broadcast service of interest through broadcast or multicast (as shown at time t0 in FIG. 5);

C7. After receiving the measurement configuration of the cell on the network side, before satisfying the measurement reporting trigger condition (such as between time t2 and time t3 in FIG. 5), if the signal strength or signal quality of the cell measured by the UE is a certain proportion of the trigger condition, in the case where the ratio is satisfied;

C8, other conditions.

Step 302: The connected UE detects through the information on the network side, and the neighboring cell does not pass through the wide area. The broadcast or multicast provides the service of interest, and the UE triggers the establishment of the unicast bearer to receive the service of interest according to the following s condition (or any combination of the following conditions) according to the network side configuration or protocol agreement, including:

D1, UR receives a handover command to switch to the cell (such as at any time t3 or later in FIG. 5);

D2. The UE receives the handover command for handover to the cell and successfully accesses the cell (as in any time at t5 or later in FIG. 5);

D3. The UE receives the measurement configuration of the cell by the network side (as in any time after t2 or later in FIG. 5);

D4. The UE triggers measurement reporting for the cell (as shown in FIG. 5 at any time after t3 or later);

D5, at any time point or agreed time point before the UE receives the measurement configuration of the cell and before triggering the measurement report (such as any time between t2 and t3 in FIG. 5);

D6. The UE detects that the target cell does not provide any time point or agreed time point after the transmission of the broadcast service of interest by broadcasting or multicasting (as shown in FIG. 5 at time t0);

D7. After receiving the measurement configuration of the cell on the network side, the UE satisfies the measurement reporting trigger condition (such as between t2 and t3 in FIG. 5), if the signal strength or signal quality of the cell measured by the UE is A certain percentage of the trigger condition, in the case where the ratio is satisfied.

Step 303: According to the triggering condition in step 302, after the unicast bearer setup triggering condition is met, the connected state UE sends the notification information to notify the high-layer entity to establish a unicast bearer corresponding to the interest service (such as the MBMS service identifier).

Step 304: The high-layer entity triggers the establishment of a unicast bearer corresponding to the service of interest according to the notification information in step 303.

In Figure 5, the message initiated at time t0 is: After detecting no interested service in the neighboring cell; the message initiated at time t1 is: MBMS Interest Indication; The message initiated at the moment is: Measurement Configuration; the message initiated at time t3 is: Measurement Report; the message initiated at time t4 is: Handover command (Handover) Command); The message initiated at time t5 is: Handover Complete.

Application Embodiment 2: As shown in FIG. 6, the UE is triggered by the idle state, and the target cell may be a neighboring cell that is adjacent to the current cell. In this case, the process of initiating the unicast bearer establishment includes the following steps:

Step 401: The network side configuration (such as by system message or dedicated signaling) or protocol stipulates that the unicast bearer establishment condition of the idle state UE triggering the interest service is as follows (including any combination of the following conditions), including:

E1, after satisfying the cell reselection condition of a certain cell (as shown in FIG. 6 at any time after t0 or later);

E2, after satisfying the cell reselection condition of a certain cell, at any time before actually reselecting to the cell (as in any time between t0 and t1 in FIG. 6);

E3, after actually reselecting to the cell (as in Figure 6 at any time after t1 or later);

E4, before satisfying the cell reselection condition of a certain cell (as in any time before t0 in FIG. 6), if the signal strength or signal quality of the cell measured by the UE is a certain ratio of the reselection condition, the In the case of proportions;

E5, other conditions.

Step 402: The idle UE detects, by using information on the network side, that the neighboring cell does not provide the service of interest through broadcast or multicast, and the UE is in accordance with the network side configuration or protocol agreement under the following conditions (or any combination of the following conditions) Trigger the establishment of a unicast bearer to receive the services it is interested in:

F1, the UE satisfies the cell reselection condition of a certain cell (such as at any time t0 or later in FIG. 6);

F2, the UE satisfies the cell reselection condition of a certain cell, and is at any time before the actual reselection to the cell (as in any time between t0 and t1 in FIG. 6);

F3. After the UE is actually reselected to the cell (as in any time after t1 or later in FIG. 6);

F4. Before the UE satisfies the cell reselection condition of a certain cell (as in any time before t0 in FIG. 6), if the signal strength or signal quality of the cell measured by the UE is a certain proportion of the reselection condition, it is satisfied. In the case of this ratio;

F5, other conditions.

Step 403: According to the triggering condition in step 402, after the unicast bearer establishment triggering condition is met, the idle state UE sends the notification information to notify the high-layer entity to establish a unicast bearer corresponding to the interest service (such as the MBMS service identifier).

Step 404: The high-level entity triggers the establishment of a unicast bearer corresponding to the service of interest according to the notification information in step 403.

Step 405: The idle state UE triggers an RRC connection establishment, and triggers establishment of a unicast bearer corresponding to the service of interest.

In Figure 6, the message initiated at time t0 is: Full fill the requirement of selecting or reselecting to the target cell; the message initiated at time t1 is: selecting or reselecting to the target cell ( Selected or reselected to the target cell).

This application scenario adopts the technical solution corresponding to the second method in the foregoing embodiment of the present invention, and has the following embodiments:

Application Embodiment 3: As shown in FIG. 7 , the eNB is triggered. The target cell may be a neighboring cell that is adjacent to the current cell. In this case, the process of initiating the unicast bearer establishment includes the following steps:

Step 501: The network side sends a message to the UE to inform the UE whether the corresponding MBMS service is broadcast in the target cell (such as the neighbor cell indication in the SIB20 message in FIG. 7).

Step 502: The UE reports its service interest to the MBMS to the network side (such as the MBMS Interest Indication message in FIG. 7).

Step 503: The UE reports its measurement report for the target cell and the current cell to the network side (such as the Measurement Report message in FIG. 7).

Step 504: The eNB determines, according to the information in step 502 and step 503, a target cell or a cell list to be used for handover. If the target cell or the cell list does not provide the MBMS service that is of interest to the UE, the eNB sends configuration information to trigger the UE. A unicast bearer corresponding to the service is established (such as a Target Cell Indication in the RRC Connection Reconfiguration message in FIG. 7).

Step 505: The UE feeds back the acknowledgment to receive the configuration information (such as RRC Connection Reconfiguration Complete message in FIG. 7).

Step 506: According to the cell information in step 504, the UE determines that the target cell does not provide the MBMS service that is interested in the broadcast mode, and the UE notifies the high-layer entity to trigger the establishment of the unicast bearer of the service (such as the MBMS service identifier). The high-level entity triggers the establishment of a unicast bearer setup process (such as the Unicast bearer setup process in FIG. 7) according to the notification information.

Step 507: The source eNB initiates a handover preparation process (such as a Handover Request message in FIG. 7) to the target eNB.

Step 508: The target eNB feeds back a handover complete message to the source eNB (such as a Handover Command message in FIG. 7).

Step 509: The source eNB sends the handover command to the UE (such as the RRC Connection Reconfiguration message in FIG. 7).

Step 510: The UE initiates a handover procedure, and notifies the target eNB after the handover is completed (such as the RRC Connection Reconfiguration Complete message in FIG. 7).

In FIG. 7, the message exchanged between the UE, the source eNB, and the target eNB includes:

SIB20: Neighbor cell indication; MBMS Interest Indication; Measurement Report; RRC Connection Reconfiguration: Target Cell Indication; RRC Connection Reconfiguration (Complete); Unicast bearer setup; Handover Request; Handover Command.

The integrated modules described in the embodiments of the present invention may also be stored in a computer readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for making A computer device (which may be a personal computer, server, or network device, etc.) performs all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), A variety of media that can store program code, such as random access memory (RAM), disk, or optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, the embodiment of the present invention further provides a computer storage medium, wherein a computer program is stored, and the computer program is used to execute the method for establishing a unicast bearer according to an embodiment of the present invention.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

The present application discloses a method for establishing a unicast bearer, a terminal, and a base station, where the method includes: the UE establishes a condition according to a unicast bearer established by the network side, or a unicast bearer established condition agreed by the network side and the UE protocol, It is detected that the target cell to be handed over does not provide the service of interest to the UE by broadcasting or multicasting; the UE initiates unicast bearer establishment according to the unicast bearer establishment condition. In the present application, when the UE switches or reselects the cell to the non-broadcast service from the cell receiving the broadcast service, the unicast bearer can be established earlier, thereby reducing the delay of the UE switching between the multicast reception and the unicast reception.

Claims

A method for establishing a unicast bearer, the method comprising:

The user equipment UE detects that the target cell to be handed over does not provide the UE by broadcast or multicast according to the unicast bearer setup condition delivered by the network side or the unicast bearer setup condition agreed by the network side and the UE protocol. Interested business;

The UE initiates unicast bearer establishment according to the unicast bearer establishment condition.
The method according to claim 1, wherein the unicast bearer establishment condition is that the UE triggers a condition corresponding to a unicast bearer for establishing a service of interest.
The method according to claim 1 or 2, wherein the unicast bearer establishment condition comprises at least one of the following:

The unicast bearer establishment is triggered when receiving a handover command to switch to the target cell;

When the handover command is switched to the target cell and is accessed to the target cell, the unicast bearer is triggered to be established;

The unicast bearer establishment is triggered when the measurement configuration of the target cell is received by the network side;

When the measurement reporting for the target cell is triggered, the unicast bearer is triggered to be established;

The unicast bearer establishment is triggered after receiving the measurement configuration of the target cell and triggering the measurement report at any time point or the agreed time point;

The unicast bearer setup is triggered at any point in time or an agreed time point after the target cell is not provided by the broadcast or multicast to provide the UE with the service of interest;

After receiving the measurement configuration of the target cell by the network side, and before the measurement reporting trigger condition is reached, if the signal strength or signal quality of the target cell measured by the UE is a preset ratio of the trigger condition, then the In the case of the preset ratio, the unicast bearer establishment is triggered;

After the cell reselection condition to the target cell is met, the unicast bearer is triggered to be established;

After the cell reselection condition of the target cell is met, the unicast bearer is triggered to be established at any time before the actual reselection to the cell;

After the actual reselection to the target cell, the unicast bearer is triggered to be established;

Before the cell reselection condition of the target cell is not reached, if the UE measures the target cell The signal strength or the signal quality is a preset ratio of the reselection condition, and the unicast bearer establishment is triggered if the preset ratio is satisfied.
The method of claim 1 or 2, further comprising:

After the unicast bearer triggering condition of the corresponding service is satisfied, the UE triggers the establishment of a unicast bearer corresponding to the service of interest according to the configuration information.
The method according to claim 4, wherein the configuration information is carried by the notification message, and the information content carried includes:

At least one of the target cell identifier, the target cell frequency point identifier, the target cell, and the service identifier of the broadcast multimedia broadcast multicast service MBMS that is not provided by the target frequency point.
The method of claim 5, the method further comprising:

If the configuration information is the target cell identifier or the target cell frequency point identifier, and the UE determines that the target cell or the target frequency point does not provide the service that is of interest to the UE, the UE triggers the unicast of the service that is interested in the UE. Bearer establishment; or,

If the configuration information is the service identifier of the broadcast MBMS that is not provided by the target cell or the target frequency point, the UE directly triggers the unicast bearer establishment of the service that is interested in the UE.
A method for establishing a unicast bearer, the method comprising:

The network side receives the interest service reported by the user equipment UE;

When the network side triggers a handover process of the UE to the target cell, detecting that the target cell to be handed over does not provide a service that is interested in the UE by broadcasting or multicasting;

The network side triggers the unicast bearer establishment of the UE according to the unicast bearer establishment condition.
The method according to claim 7, wherein the unicast bearer establishment condition is: a unicast bearer establishment condition that is configured and delivered to the UE by the network side, or a unicast bearer establishment condition agreed by the network side and the UE protocol .
The method of claim 7 further comprising:

Determining, by the network side, whether to trigger a handover process of the UE to the designated target cell, if yes, determining that the unicast bearer setup process of the UE is triggered according to the unicast bearer setup condition, and triggering the unicast bearer of the UE Established; or,

The configuration information is sent to the UE by the network side, and the unicast bearer establishment of the UE is triggered.
The method according to claim 9, wherein the configuration information comprises at least one of a target cell identifier, a target cell frequency point identifier, a target cell, and a service identifier of a broadcast service that is not provided by the target frequency point.
A terminal, wherein the terminal comprises:

The first detecting unit is configured to detect a unicast bearer establishment condition delivered by the network side, or a unicast bearer establishment condition agreed by the network side and the terminal protocol, and detect that the target cell to be handed over does not pass the broadcast or multicast Providing services of interest to the terminal;

The first bearer establishing unit is configured to initiate unicast bearer setup according to the unicast bearer setup condition.
The terminal according to claim 11, wherein the unicast bearer establishment condition is: a condition that the terminal triggers generation of a unicast bearer corresponding to the service of interest.
The terminal according to claim 11 or 12, wherein the unicast bearer establishment condition comprises at least one of the following contents:

The unicast bearer establishment is triggered when receiving a handover command to switch to the target cell;

When the handover command is switched to the target cell and the target cell is successfully accessed, the unicast bearer is triggered to be established;

The unicast bearer establishment is triggered when the measurement configuration of the target cell is received by the network side;

When the measurement reporting for the target cell is triggered, the unicast bearer is triggered to be established;

The unicast bearer establishment is triggered after receiving the measurement configuration of the target cell and triggering the measurement report at any time point or the agreed time point;

The unicast bearer establishment is triggered at any point in time or an agreed time point after the target cell is not provided by the broadcast or multicast to provide the terminal interested service;

After receiving the measurement configuration of the target cell by the network side, and before the measurement reporting trigger condition is reached, if the signal strength or signal quality of the target cell measured by the terminal is a preset ratio of the trigger condition, then The unicast bearer establishment is triggered when the preset ratio is met;

After the cell reselection condition to the target cell is met, the unicast bearer is triggered to be established;

After the cell reselection condition of the target cell is met, the unicast bearer is triggered to be established at any time before the actual reselection to the cell;

After the actual reselection to the target cell, the unicast bearer is triggered to be established;

Before the cell reselection condition of the target cell is not reached, if the signal strength or signal quality of the target cell measured by the terminal is a preset ratio of the reselection condition, if the preset ratio is satisfied, The unicast bearer setup is triggered.
The terminal according to claim 11 or 12, further comprising:

The first notification unit is configured to trigger the unicast bearer corresponding to the service of interest according to the configuration information after the terminal satisfies the unicast bearer triggering condition of the corresponding service.
The terminal according to claim 14, wherein the first notification unit is further configured to: carry the configuration information by using a notification message, where the information content that is carried includes:

At least one of a target cell identifier, a target cell frequency point identifier, a target cell, and a service identifier of a broadcast MBMS that is not provided by the target frequency point.
The terminal according to claim 15, wherein the first bearer establishing unit is further configured to:

Determining that the configuration information is the target cell identifier or the target cell frequency point identifier, and determining that the target cell or the target frequency point does not provide the service that is interested in the terminal, triggering unicast of the service interested in the terminal Bearer establishment; or,

Determining that the configuration information is a service identifier of a broadcast MBMS that is not provided by the target cell or the target frequency point, and directly triggers unicast bearer establishment of a service that is interested in the terminal.
A base station, the base station comprising:

a second receiving unit, configured to receive the service of interest reported by the user equipment UE;

a second detecting unit, configured to: when the base station triggers a handover process of the UE to the target cell, detecting that the target cell to be handed over does not provide a service that is interested in the UE by using broadcast or multicast;

The second bearer establishing unit is configured to trigger the unicast bearer establishment of the UE according to the unicast bearer establishment condition.
The base station according to claim 17, wherein the unicast bearer setup condition is a unicast bearer setup condition configured by the base station and delivered to the UE, or a unicast bearer setup condition agreed by the base station and the UE protocol.
The base station according to claim 17, the base station further comprising:

a second trigger determining unit, configured to determine whether to trigger a handover process of the UE to the specified target cell, and if yes, determining that the unicast bearer setup process of the UE is triggered according to the unicast bearer setup condition, and triggering the UE The unicast bearer is established; or the configuration information is sent to the UE, and the unicast bearer establishment of the UE is triggered.
The base station according to claim 19, wherein the configuration information comprises at least one of a target cell identifier, a target cell frequency point identifier, a target cell, and a service identifier of a broadcast service that is not provided by the target frequency point.