WO2017080514A1

WO2017080514A1 - Base station and cell switching method and device

Info

Publication number: WO2017080514A1
Application number: PCT/CN2016/105500
Authority: WO
Inventors: 景晓玺
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-11-12
Filing date: 2016-11-11
Publication date: 2017-05-18
Also published as: CN106714246A

Abstract

Disclosed are a base station and a cell switching method and device. The method comprises: a serving cell acquires carrier aggregation frequency points supported by a terminal; the serving cell acquires a neighbor cell set, wherein the neighbor cell set comprises carrier frequency points of each neighbor cell; the serving cell selects neighbor cells identical to the carrier aggregation frequency points supported by the terminal from the neighbor cell set, and determines same to be a target cell set; the serving cell selects a designated cell from the target cell set, and determines same to be a target cell; and the serving cell initiates cell switching.

Description

Base station and cell switching method and device

Technical field

The present disclosure relates to the field of mobile communications, for example, to a base station and cell handover method and apparatus.

Background technique

In the Long Term Evolution (LTE) system, the terminal always selects the cell with the best signal, and the base station preferentially selects the neighbor with the best signal quality as the handover target cell. In the carrier aggregation scenario, the terminal supporting carrier aggregation is also in accordance with this rule. In the cell handover process, the cell with the best selection signal resides.

For a terminal that supports carrier aggregation, the terminal needs to be switched to a specific carrier due to the physical characteristics of the carrier where the cell is located, etc., and resides as the primary carrier of the terminal, but based on the 3rd Generation Partnership Project (the 3rd Generation Partnership Project) 3GPP) protocol, after the cell handover, the terminal still selects the best cell camping. If the signal quality of the carrier cell after handover is not good, the terminal will initiate cell handover again, resulting in the terminal. The phenomenon of ping-pong switching occurs.

Summary of the invention

The present disclosure proposes a base station and a cell handover method and apparatus, which reduce the phenomenon that a terminal supporting carrier aggregation in the related art occurs during ping-pong handover.

The present disclosure provides a cell handover method, including:

The serving cell acquires a carrier aggregation frequency point supported by the terminal;

The serving cell acquires a set of neighboring cells, where the set of neighboring cells includes a carrier frequency point of each neighboring cell;

The serving cell selects a neighboring cell that is the same as the carrier aggregation frequency supported by the terminal from the set of neighboring cells, and determines the target cell set;

The serving cell selects a designated cell from the set of target cells, and determines the target cell;

The serving cell initiates a cell handover.

Optionally, the serving cell selects a designated cell from the target cell set, and after determining the target cell, The method also includes:

The serving cell acquires a signal quality value of the serving cell as a first signal quality value;

The serving cell acquires a signal quality value of the target cell as a second signal quality value;

A new handover threshold of the terminal is determined according to the initial handover threshold, the first signal quality value, and the second signal quality value of the terminal.

Optionally, determining a new handover threshold of the terminal according to the initial handover threshold, the first signal quality value, and the second signal quality value of the terminal, including:

The first signal quality value and the second signal quality value are made worse to obtain a signal quality difference;

The initial switching threshold of the terminal is summed with the signal quality difference value to obtain a new switching threshold of the terminal.

The first signal quality value and the second signal quality value are averaged to obtain a signal quality difference;

The signal quality difference is used as the new switching threshold of the terminal.

Optionally, after the serving cell selects the designated cell from the target cell set and determines the target cell, the method further includes:

Set the signal quality difference threshold; and

The initial handover threshold of the terminal is summed with the signal quality difference threshold as a new handover threshold of the terminal.

Optionally, the serving cell selects the designated cell from the target cell set, and after determining the target cell, the method further includes:

The target cell sends a new handover threshold to the terminal.

The present disclosure also provides a switching device, including:

a carrier frequency point acquisition module, configured to acquire a carrier aggregation frequency point supported by the terminal;

a neighboring area collection acquiring module, configured to acquire a neighboring area set, where the neighboring area set includes a carrier frequency point of each neighboring area;

a target cell acquiring module, configured to select, from the set of neighboring cells, a carrier aggregation frequency supported by the terminal The same neighboring area is determined as a target cell set;

a target cell determining module, configured to select a designated cell from the target cell set, and determine the target cell;

The cell switching module is configured to initiate a cell handover.

Optionally, the device further includes:

The switching threshold processing module is configured to obtain a signal quality value of the serving cell as the first signal quality value, and obtain a signal quality value of the target cell, as a second signal quality value, and according to an initial handover threshold of the terminal, The first signal quality value and the second signal quality value determine a new switching threshold of the terminal.

Optionally, the device further includes:

The sending module is configured to send a new switching threshold to the terminal.

The present disclosure also provides a base station including the above cell switching apparatus. The present disclosure also provides a non-transitory computer readable storage medium storing computer executable instructions arranged to perform the above method.

The present disclosure also provides an electronic device, the electronic device comprising:

At least one processor;

a memory communicatively coupled to the at least one processor; wherein

The memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to cause the at least one processor to perform the method described above.

By means of the cell handover method of the embodiment of the present disclosure, the phenomenon that the terminal supporting the carrier aggregation in the related art occurs after the primary carrier cell handover process occurs, the ping-pong handover occurs. According to the technical solution provided by the disclosure, the terminal can specify with the base station. The same cell of the primary carrier resides, avoiding ping-pong switching after cell handover.

The above description is only an overview of the technical solutions of the present disclosure, and the technical means of the present disclosure can be implemented in accordance with the contents of the specification, and in order to make the above features of the present disclosure more apparent, the following is a list of the present disclosure. Implementation.

DRAWINGS

The drawings are only used to illustrate alternative embodiments and are not to be considered as limiting. Throughout the drawings, the same reference numerals are used to refer to the same parts. The embodiments of the present disclosure and the features in the embodiments may be arbitrarily combined with each other without conflict.

1 is a schematic structural diagram 1 of a cell switching apparatus according to an embodiment of the present disclosure;

2 is a second schematic structural diagram of a cell switching apparatus according to an embodiment of the present disclosure;

3 is a flowchart of a cell handover method according to an embodiment of the present disclosure;

4 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 5 is a flowchart 1 of a cell handover method according to an embodiment of the present disclosure;

6 is a second flowchart of a cell handover method according to an embodiment of the present disclosure; and

FIG. 7 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present disclosure.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings.

The techniques for controlling the user-resident cell in the 3GPP protocol are all adjusted according to the granularity of the cell. Regardless of the frequency priority or the modification of the handover measurement threshold, all users in the cell may be affected, and one of the terminals cannot be satisfied. The control (for example, in the carrier aggregation scenario, only the terminal that supports carrier aggregation needs to adjust the primary carrier), and the unidirectional parameter modification may cause the terminal to migrate to the target cell, and may trigger the coverage-based handover and switch back. The original cell generates a ping-pong switch.

In the scenario of carrier aggregation, data is jointly transmitted by two or more carriers to obtain larger system bandwidth and improve the user's rate experience. Carrier aggregation can make full use of the carrier's multiple frequency band resources. However, the transmission characteristics of the aggregated carriers are different. There may be differences in coverage performance. You can choose to cover the better carrier as the primary carrier to improve transmission efficiency. This requires the base station to have the function of controlling the user's camped cell. The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the embodiments described herein are merely illustrative of the disclosure and are not intended to be limiting.

Device embodiment

According to an embodiment of the present disclosure, a cell switching apparatus is provided. FIG. 1 is a schematic structural diagram 1 of a cell switching apparatus according to an embodiment of the present disclosure. As shown in FIG. 1 , a cell switching apparatus according to an embodiment of the present disclosure includes carrier frequency point acquisition. Module 100, neighboring cell collection module 102, target cell acquisition module 104, and destination The target cell determination module 106 and the cell handover module 108. among them,

The carrier frequency point obtaining module 100 is configured to acquire a carrier aggregation frequency point supported by the terminal.

The neighboring region collection obtaining module 102 is configured to acquire a neighboring cell set, wherein the neighboring cell set includes a carrier frequency point of each neighboring cell.

The target cell acquiring module 104 is configured to select a neighboring cell that is the same as the carrier aggregation frequency point supported by the terminal from the set of neighboring cells, and determine the target cell set.

The target cell determining module 106 is configured to select a designated cell from the target cell set and determine the target cell.

The cell handover module 108 is arranged to initiate a cell handover.

FIG. 2 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present disclosure. As shown in FIG. 2, the cell switching apparatus may further include a handover threshold processing module 110 and a sending module 112. among them,

The handover threshold processing module 110 is configured to acquire a signal quality value of the serving cell as a first signal quality value, and obtain a signal quality value of the target cell, as a second signal quality value, and according to an initial handover threshold of the terminal. And a first signal quality value and a second signal quality value to determine a new handover threshold of the terminal.

The transmitting module 112 is arranged to send a new handover threshold to the terminal.

Through the embodiments of the present disclosure, the terminal can camp on the designated primary carrier cell, and avoid the phenomenon that the ping-pong switching occurs when the handover-based handover is triggered after the terminal changes the primary carrier.

Base station embodiment

According to an embodiment of the present disclosure, there is provided a base station including the above-described cell switching apparatus, which is not described herein again.

For convenience of description of the embodiments of the present disclosure, the present disclosure combines the module functions of the foregoing cell switching apparatus, where the cell switching apparatus includes a decision information collecting module, a resident cell decision module, and a resident policy execution module, wherein the decision information collecting module has The function of the carrier frequency acquisition module 100, the neighboring cell collection module 102, the target cell acquisition module 104, and the target cell determination module 106, and the resident cell decision module (with the handover threshold described above) The function of the processing module 110) and the resident policy enforcement module (having the functionality of the cell switching module 108 described above), wherein:

The judgment information collection module is configured to collect information that needs to be collected by the resident cell decision module, according to There are also differences in the information that needs to be collected, depending on the scenario. For example, load balancing and energy supply needs to collect load signaling and carrier aggregation for the serving cell and the neighboring area. It is necessary to collect the frequency information of the serving cell and the neighboring cell. The judgment information collecting module collects the information and transmits it to the resident cell decision module.

The camping cell decision module is configured to determine whether the terminal needs to adjust the camped cell and the camped target cell according to different service scenarios, terminal capability information, and neighboring area related information, and simultaneously calculate an offset value of the measured target cell measurement parameter, and form an offset value. The terminal camped cell policy is sent to the resident policy execution module.

The resident policy execution module is set to be responsible for the execution of the resident policy.

During the cell handover process, the decision information collection module, the resident cell decision module, and the resident policy execution module are processed as follows:

The decision information collection module is responsible for collecting the information that needs to be collected by the resident cell decision module. The information to be collected is also different according to the application scenario. For example, load balancing and energy supply needs to collect load signaling and carrier aggregation for the serving cell and the neighboring cell. It is necessary to collect the frequency information of the serving cell and the neighboring cell; the decision information collecting module collects the information and transmits it to the resident cell decision module);

When a terminal accesses a cell, the resident cell decision module determines whether the terminal needs to adjust the camped cell and the camped target cell according to different service scenarios, terminal capability information, and neighboring cell related information, and forms a terminal camped cell policy to send to the cell. Resident policy execution module;

The camping policy execution module is responsible for performing the camping policy, and initiates a handover procedure to the camping target cell, where the handover request message carries the offset value of the measurement target cell measurement parameter, and the resident target cell receives the handover request message, saves and adjusts The offset value of the target cell measurement parameter;

Switching between the original cell and the target cell to complete the handover process;

The target cell configures the coverage-based handover measurement for the terminal, and superimposes the offset value of the adjustment target cell measurement parameter saved in the handover request on the basis of the original handover threshold of the terminal.

Method embodiment

An embodiment of the present disclosure provides a cell handover method, and FIG. 3 is a flowchart of a cell handover method according to an embodiment of the present disclosure.

In step 310, the serving cell acquires a carrier aggregation frequency point supported by the terminal.

In step 320, the serving cell acquires a set of neighboring cells, wherein the set of neighboring cells includes a carrier frequency point of each neighboring cell.

In step 330, the serving cell selects a neighboring cell that is the same as the carrier aggregation frequency supported by the terminal from the set of neighboring cells, and determines the target cell set.

In step 340, the serving cell selects a designated cell from the target cell set and determines to be the target cell.

In step 350, the serving cell initiates a cell handover.

After step 350, the method can also include steps 360 and 370.

In step 360, the serving cell acquires the signal quality value of the serving cell as the first signal quality value, and the serving cell acquires the signal quality value of the target cell as the second signal quality value, and according to the initial handover threshold of the terminal, The first signal quality value and the second signal quality value determine a new switching threshold of the terminal.

In step 370, the target cell transmits a new handover threshold to the terminal.

Wherein, in step 360, the new handover threshold of the terminal may be determined by one of the following three methods.

In the first method for determining a new handover threshold of a terminal, the first signal quality value and the second signal quality value are compared to obtain a signal quality difference, and the initial handover threshold and signal quality of the terminal are obtained. The difference is summed to get the new switching threshold of the terminal. Wherein, if the difference is positive, the initial switching threshold of the terminal is summed with the signal quality difference to obtain a new switching threshold. If the difference is zero or negative, the initial switching threshold of the terminal constant.

In a second method for determining a new handover threshold of a terminal, averaging the first signal quality value and the second signal quality value to obtain a signal quality difference; and using the signal quality difference as a new switching gate Limit.

In the third method for determining a new handover threshold of the terminal, a signal quality difference threshold is set, and the initial handover threshold of the terminal is combined with the signal quality difference threshold as a new handover threshold of the terminal.

The present disclosure provides a user-level method for controlling a user-resident cell, which can flexibly control terminal carrier frequency distribution, satisfy carrier aggregation frequency priority control, and improve applicability of an LTE network scenario.

The technical solutions of the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. 4 is a schematic structural diagram of a base station according to an embodiment of the present disclosure. As shown in FIG. 4, a base station according to an embodiment of the present disclosure includes: an original eNodeB (where an eNodeB (Evolved Node B) is an evolved base station) and a resident migration target eNodeB. The original eNodeB includes a decision information collection module, a resident cell decision module, and a resident policy execution module. The target eNodeB includes a decision information collection module and a resident policy execution module, and the base station structure diagram of FIG. 4 is used. FIG. 5 is a flowchart 1 of a cell handover method according to an embodiment of the present disclosure, which is a configuration based on a configuration in a carrier aggregation scenario. ,.

In step 510, the decision information collection module of the original eNodeB collects frequency information of the local cell (ie, the serving cell described above) and the neighboring cell.

In step 520, when a new terminal accesses the local cell, if the terminal is a terminal supporting the carrier aggregation function, the resident decision module determines that the carrier aggregation priority primary carrier frequency point is not the local frequency point, and then the neighboring cell list ( That is, the neighboring cell that matches the priority primary carrier frequency is selected in the neighboring cell set, and the primary carrier switching target cell list (ie, the target cell set described above) is generated, and the threshold offset value is measured ( That is, the signal quality difference threshold value described above is configured as a fixed value. The resident decision module sends the primary carrier handover target cell list and the measurement threshold offset value to the resident policy enforcement module.

In step 530, the camping policy execution module randomly selects one cell from the primary carrier handover target cell list as the handover target cell to initiate the handover procedure, and brings the measurement threshold offset value to the target cell in the handover request message.

In step 540, the target cell camping policy execution module saves the measurement threshold offset value in the handover request message, and performs a normal handover procedure to switch the terminal to the target cell.

In step 550, the target cell camping policy execution module generates an overlay-based handover measurement configuration, and combines the measurement threshold offset value with the handover threshold (ie, the initial handover threshold value described above) as a new handover. The threshold is configured for the terminal.

In step 560, the terminal initiates a radio resource control (Radio Resource Control, RRC for short) release procedure, and the resident policy execution module carries the cell reselection priority parameter (IdleModeMobilityControlInfo->FreqPriorityListEUTRA) in the RRC release message to prioritize carrier aggregation. The primary carrier frequency is used as the highest priority frequency of the cell reselection, and the designated terminal preferentially selects the priority primary carrier frequency as the resident cell in the idle (IDLE) state.

The steps 510 to 530 are operations performed by the original eNodeB side, and the steps 540 to 550 are operations performed by the target eNodeB side.

With reference to the schematic diagram of the base station structure of FIG. 4, FIG. 6 is a second flowchart of a cell handover method according to an embodiment of the present disclosure, which is an embodiment based on measurement in a carrier aggregation scenario.

In step 610, the decision information collection module of the original eNodeB collects the local cell (ie, as described above). Frequency information of the serving cell) and the neighboring area.

In step 620, when a new terminal accesses the local cell, if the terminal supports the carrier aggregation function, the resident decision module determines that the carrier aggregation priority primary carrier frequency is not the local frequency, and then the neighbor list (ie, the above) Selecting a neighboring cell that matches the frequency of the priority primary carrier, and generating a primary carrier switching target cell list (ie, the target cell set described above), and the resident decision module switches the primary carrier to the target cell list. Sent to the resident policy execution module.

In step 630, the resident policy execution module sends the A4 measurement configuration on the priority primary carrier to the terminal.

In step 640, the resident cell decision module receives the A4 measurement report reported by the terminal, and selects the handover target cell. If the difference between the serving cell signal quality (ie, the first signal quality value described above) and the neighboring cell signal quality (ie, the second signal quality value described above) in the A4 measurement report is a positive value, the difference is It is saved as the measurement threshold offset value, otherwise the measurement threshold offset value is 0. The load balancing target cell and the measurement threshold offset value are sent to the resident policy execution module.

In step 650, the camping policy execution module performs a handover procedure to the target cell, and the measurement threshold offset value is brought to the target cell in the handover request message.

In step 660, the target cell camping policy execution module saves the measurement threshold offset value in the handover request message, and performs a normal handover procedure to switch the terminal to the target cell.

In step 670, the target cell camping policy execution module generates an overlay-based handover measurement configuration, and superimposes the measurement threshold offset value on the handover threshold (ie, the initial handover threshold value described above) as a new handover threshold. Configured to the terminal.

In step 680, the terminal initiates an RRC release procedure, and the resident policy execution module carries a cell reselection priority parameter (IdleModeMobilityControlInfo->FreqPriorityListEUTRA) in the RRC release message, and uses the carrier aggregation priority primary carrier frequency as the highest priority of cell reselection. At the frequency point, the designated terminal preferentially selects the priority primary carrier frequency point as the camping cell in the IDLE state.

The steps 610 to 650 are operations performed by the original eNodeB side, and the steps 560 to 670 are operations performed by the target eNodeB side.

Compared with the related art, a method for controlling a camped cell at a user level is added, which avoids the defect that the camping cell cannot be controlled by a single terminal in the related art, and the LTE network is improved. The applicability of the scenario enhances the system's ability to accurately control a single terminal, while avoiding the phenomenon of terminal ping-pong switching caused by the resident cell migration.

Embodiments of the present disclosure also provide a non-transitory computer readable storage medium storing computer executable instructions arranged to perform the method of any of the above embodiments.

The embodiment of the present disclosure further provides a schematic diagram of a hardware structure of an electronic device. Referring to FIG. 7, the electronic device includes:

At least one processor 70, which is exemplified by a processor 70 in FIG. 7; and a memory 71, may further include a communication interface 72 and a bus 73. The processor 70, the communication interface 72, and the memory 71 can complete communication with each other through the bus 73. Communication interface 72 can be used for information transfer. Processor 70 can invoke logic instructions in memory 71 to perform the methods of the above-described embodiments.

In addition, the logic instructions in the memory 71 described above may be implemented in the form of a software functional unit and sold or used as a stand-alone product, and may be stored in a computer readable storage medium.

The memory 71 is a computer readable storage medium and can be used to store a software program, a computer executable program, a program instruction or a module corresponding to the method in the embodiment of the present disclosure. The processor 30 performs a function application and data processing by executing a software program, an instruction or a module stored in the memory 71, that is, implementing a cell switching method.

The memory 71 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to usage of the terminal device, and the like. Further, the memory 71 may include a high speed random access memory, and may also include a nonvolatile memory.

The technical solution of the present disclosure may be embodied in the form of a software product stored in a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) Performing all or part of the steps of the method of the embodiments of the present disclosure. The foregoing storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random storage memory (RAM), a magnetic disk, or an optical disk. A medium that can store program code, or a transitory storage medium.

This disclosure is also not directed to any particular programming language. It will be appreciated that the teachings of the disclosure described herein can be implemented in a variety of programming languages.

The various features of the disclosure can be grouped together into a single embodiment, figure, or depiction of the feature In the middle. Those skilled in the art will appreciate that the modules in the client in the embodiment can be adaptively changed and the modules in the client can be placed in one or more clients different from the embodiment. The modules in the embodiment can be combined into one module, and they can be divided into a plurality of sub-modules or sub-units or sub-components.

Multiple component embodiments of the present disclosure may be implemented in hardware, or in a software module running on one or more processors, or in a combination of hardware and software. Those skilled in the art will appreciate that a microprocessor or digital signal processor (DSP) may be used in practice to implement some of some or all of the components of the client loaded with the sorted URL of embodiments of the present disclosure. Or all features. The present disclosure may also be implemented as a device or device program (eg, a computer program and a computer program product) for performing some or all of the methods described herein. Such a program implementing the present disclosure may be stored on a computer readable medium or may be in the form of one or more signals. Such signals can be downloaded from the Internet website or provided on the carrier signal.

The word "comprising" does not exclude the presence of the elements or steps that are not recited in the claims. The word "a" or "an" The present disclosure can be implemented by means of hardware comprising one or more different elements and by means of a suitably programmed computer. In the unit claims enumerating one or more devices, one or more of these devices can be embodied by the same hardware. The use of the words first, second, third, etc. does not denote any order, and these words can be interpreted as names.

Industrial applicability

The base station and the cell handover method and apparatus provided by the present disclosure reduce the phenomenon that the terminal supporting the carrier aggregation in the related art occurs during the cell handover process.

Claims

A cell handover method includes:

The serving cell acquires a carrier aggregation frequency point supported by the terminal;

The serving cell acquires a set of neighboring cells, where the set of neighboring cells includes a carrier frequency point of each neighboring cell;

And selecting, by the serving cell, a neighboring cell that is the same as a carrier aggregation frequency point supported by the terminal, and determining the target cell set;

The serving cell selects a designated cell from the set of target cells, and determines the target cell;

The serving cell initiates a cell handover.
The method of claim 1, wherein the serving cell selects a designated cell from the set of target cells, and after determining the target cell, the method further includes:

Obtaining, by the serving cell, a signal quality value of the serving cell as a first signal quality value;

Obtaining, by the serving cell, a signal quality value of the target cell as a second signal quality value;

Determining a new handover threshold of the terminal according to the initial handover threshold of the terminal, the first signal quality value, and the second signal quality value.
The method of claim 2, wherein said determining a new switching threshold of said terminal based on said initial switching threshold of said terminal, said first signal quality value and said second signal quality value Values, including:

Determining the first signal quality value and the second signal quality value to obtain a signal quality difference;

And summing the initial handover threshold of the terminal and the signal quality difference to obtain a new handover threshold of the terminal.
The method of claim 2, wherein said according to said terminal's initial switching threshold, Determining, by the first signal quality value and the second signal quality value, a new handover threshold of the terminal, including:

And averaging the first signal quality value and the second signal quality value to obtain a signal quality difference;

The signal quality difference is used as a new switching threshold of the terminal.
The method of claim 1, wherein the serving cell selects a designated cell from the set of target cells, and after determining the target cell, the method further includes:

Set the signal quality difference threshold; and

And summing an initial handover threshold of the terminal and the signal quality difference threshold as a new handover threshold of the terminal.
The method of claim 2, after the serving cell selects a designated cell from the set of target cells, and after determining the target cell, the method further includes:

The target cell sends the new handover threshold to the terminal.
A cell switching device includes:

a carrier frequency point acquisition module, configured to acquire a carrier aggregation frequency point supported by the terminal;

a neighboring cell collection acquiring module, configured to acquire a neighboring cell set, where the neighboring cell set includes a carrier frequency point of each neighboring cell;

The target cell acquiring module is configured to select, from the set of neighboring cells, a neighboring cell that is the same as the carrier aggregation frequency point supported by the terminal, and determine the target cell set;

a target cell determining module, configured to select a designated cell from the target cell set, and determine to be a target cell;

The cell switching module is configured to initiate a cell handover.
The device of claim 7 further comprising:

a handover threshold processing module, configured to acquire a signal quality value of the serving cell as a first signal quality value, and acquire a signal quality value of the target cell, as a second signal quality value, and an initial handover according to the terminal The threshold value, the first signal quality value, and the second signal quality value determine a new switching threshold of the terminal.
The device of claim 7 further comprising:

The sending module is configured to send the new switching threshold to the terminal.
A base station comprising the apparatus of any one of claims 7 to 9.
A non-transitory computer readable storage medium storing computer executable instructions arranged to perform the method of any of claims 1-6.