CN105898801A - Load balance method and base station - Google Patents

Abstract

Embodiments of the present invention provide a load balancing method and a base station, which can realize load balancing of CCs under the same base station, thereby avoiding control resource reconfiguration caused by unbalanced loads of CCs, thereby ensuring that users or services can be scheduled in time , to ensure the quality of user communication. The method includes: obtaining the resource occupancy rate of the serving cell of the UE; if it is determined that the resource occupancy rate of the serving cell of the UE exceeds a preset threshold, determining a qualified target base station from base stations to which neighboring cells of the serving cell belong; wherein, the UE The signal quality under the target base station is better than that of the UE under the base station of the serving cell, the number of carriers that the UE can perform carrier aggregation under the target base station is greater than the number of carriers that the UE currently performs carrier aggregation under the base station of the serving cell, and the UE The resource occupancy rates of at least two cells that can perform carrier aggregation under the target base station are both lower than a preset threshold; handover the UE to the target base station. The invention is applicable to the technical field of communication.

Description

A load balancing method and base station

technical field

The present invention relates to the technical field of communications, in particular to a load balancing method and a base station.

Background technique

Carrier Aggregation (Carrier Aggregation, CA) is a key technology in the Long Term Evolution-Advanced (LTE-A) system, which transmits user data simultaneously on multiple component carriers (Component Carrier, CC) , which can increase the user's transmission bandwidth and increase the user's data transmission rate.

In the prior art, in order to facilitate the management of the CC, the CC is divided into a primary component carrier (Primary Component Carrier, PCC) and a secondary component carrier (Secondary Component Carrier, SCC), and it is stipulated that each user equipment (User Equipment, UE) has 1 uplink PCC and 1 downlink PCC and up to 4 uplink SCCs and 4 downlink SCCs. Wherein, the uplink PCC and the downlink PCC are associated together to form a primary cell (Primary Cell, PCell), and the downlink SCC and uplink SCC are associated together to form a secondary cell (Secondary Cell, SCell). The primary cell and the secondary cell serve as serving cells together. UEs provide services. Since each UE within the coverage of the base station usually selects the PCC and the SCC according to different policies, there will be a problem of load imbalance among CCs under the same base station. That is to say, the distribution of users on various CCs under the same base station may be unbalanced, some CC resources are not fully utilized, while other CCs are in a saturated state, even exceeding the maximum load capacity of this CC. However, once the load of the CC exceeds the maximum capacity it can carry, it will cause reconfiguration of control resources, resulting in that users or services cannot be scheduled in time, and the communication quality of users will be affected.

Contents of the invention

To this end, the embodiments of the present invention provide a load balancing method and a base station, which can realize load balancing between CCs under the same base station, thereby avoiding control resource reconfiguration caused by unbalanced loads of CCs, thereby ensuring user or business It can be dispatched in time to ensure the communication quality of users.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In the first aspect, a load balancing method is provided, including:

Obtain the resource occupancy rate of the UE's serving cell; if it is determined that the resource occupancy rate of the UE's serving cell exceeds the preset threshold, determine a qualified target base station from the base stations to which the adjacent cells of the serving cell belong; wherein, the UE is under the target base station The signal quality is better than that of the UE under the base station of the serving cell, the number of carriers that the UE can perform carrier aggregation under the target base station is greater than the number of carriers that the UE currently performs carrier aggregation under the base station of the serving cell, and the UE can perform carrier aggregation under the target base station The resource occupancy rates of at least two cells performing carrier aggregation are both lower than a preset threshold; handover the UE to the target base station.

In a second aspect, a base station is provided, including: an acquiring unit, a determining unit, and a switching unit;

an acquiring unit, configured to acquire the resource occupancy rate of the serving cell of the user equipment UE;

A determining unit, configured to determine a qualified target base station from base stations to which adjacent cells of the serving cell belong if it is determined that the resource occupancy rate of the serving cell of the UE exceeds a preset threshold; wherein, the signal quality of the UE under the target base station is better than that of the UE For the signal quality under the base station of the serving cell, the number of carriers that the UE can perform carrier aggregation under the target base station is greater than the number of carriers that the UE currently performs carrier aggregation under the base station of the serving cell, and the number of carriers that the UE can perform carrier aggregation under the target base station is at least The resource occupancy rates of the two cells are both lower than the preset threshold;

The switching unit is configured to switch the UE to the target base station.

Based on the load balancing method and the base station provided by the embodiments of the present invention, by obtaining the resource occupancy rate of the serving cell of the UE, and after determining that the resource occupancy rate of the serving cell exceeds the preset threshold, determine from the base station to which the adjacent cell of the serving cell belongs For a target base station that meets the conditions, handover the UE from the source base station to the target base station, which can reduce the load of the CC corresponding to the serving cell where the UE is located under the source base station. After implementing the same load balancing method for each UE in the coverage area of the source base station , the load balance between CCs under the source base station can be realized, so as to avoid the reconfiguration of control resources caused by the unbalanced load among CCs, and then ensure that users or services can be scheduled in time to ensure the quality of user communication.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is a diagram of an application scenario provided by an embodiment of the present invention;

FIG. 2 is a first schematic flow diagram of a load balancing method provided by an embodiment of the present invention;

FIG. 3 is a second schematic flow diagram of a load balancing method provided by an embodiment of the present invention;

FIG. 4 is an example application scenario diagram provided by an embodiment of the present invention;

FIG. 5 is a first structural schematic diagram of a base station provided by an embodiment of the present invention;

FIG. 6(a) is a schematic structural diagram II of a base station provided by an embodiment of the present invention;

FIG. 6(b) is a schematic structural diagram III of a base station provided by an embodiment of the present invention;

FIG. 7 is a fourth structural schematic diagram of a base station provided by an embodiment of the present invention.

detailed description

The present invention is mainly applied to a mobile communication system, and the mobile communication system may specifically be an advanced long-term evolution (LTE Advanced, LTE-A) system, or a continuous evolution communication system of other versions in the future or other mobile communication systems, etc., the embodiment of the present invention This is not specifically limited.

It should be noted that, in order to clearly describe the technical solutions of the embodiments of the present invention, in the following embodiments of the present invention, words such as "first" and "second" are used to refer to the same items or items with basically the same functions and effects. Similar items are distinguished, and those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order.

In addition, it should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Those skilled in the art can understand that the examples shown in the embodiments of the present application are schematic descriptions of the present invention for the convenience of readers to understand, and do not constitute limitations of the present invention.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

For ease of understanding, first, the relevant concepts involved in the embodiments of the present invention are briefly introduced as follows:

CA: The so-called CA is to combine fragmented frequency bands into a "virtual" wider frequency band, so as to simultaneously transmit user data on the wider frequency band, so as to increase the transmission bandwidth of user data and increase the data transmission rate. . Among them, fragmented frequency bands are CCs, and each CC corresponds to an independent cell, so one CC can usually be equivalent to one cell.

PCell: The PCell is a cell where the UE performs initial connection establishment, or a cell that performs Radio Resource Control (Radio Resource Control, RRC) connection reestablishment, and is responsible for RRC communication with the UE. The carrier unit corresponding to the PCell is called the PCC, where the downlink carrier of the PCell is called the downlink PCC, and the uplink carrier of the PCell is called the uplink PCC.

SCell: SCell is a cell added in the RRC reconfiguration process after the initial security activation process to provide additional radio resources. The carrier unit corresponding to the SCell is called the SCC, the downlink carrier of the SCell is called the downlink SCC, and the uplink carrier of the SCell is called the uplink SCC.

Serving cell: The serving cell is a cell that provides services (uplink and downlink transmission) for the UE. If the UE is in the connected state but CA is not configured, the UE has only one serving cell, that is, PCell; if the UE is in the connected state and CA is configured, the serving cell set of the UE includes the PCell and all SCells. That is to say, the serving cell may refer to either the PCell or the SCell.

In addition, according to the provisions of the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) agreement, a UE configured with CA can communicate with 1 PCell and at most 4 SCells, that is, 1 UE includes at most 5 serving cells. It should be noted that CA is a UE-level feature, and different UEs may have different PCells and SCells due to different strategies for selecting PCells and SCells.

Secondly, an application scene diagram of the present invention is given, as shown in FIG. 1 .

In the figure, each UE 30 within the coverage area of the base station 10 selects PCC and SCC according to different policies, and communicates with the base station 10 through the PCC and SCC, so the load among the CCs under the base station 10 will be unbalanced, and even some CCs may appear The load exceeds its maximum capacity. Once the load of the CC exceeds the maximum capacity it can carry, it will cause reconfiguration of control resources, which will cause users or services to not be scheduled in time, and affect the communication quality of users.

As shown in FIG. 1 , the coverage areas of the base station 10 and its adjacent base station 20 overlap. Therefore, when the load of the CC where UE30 is located exceeds the maximum capacity it can carry, multiple CCs adjacent to the base station 10 can Select a qualified target base station for UE30 in the base station, and switch UE30 to the target base station to reduce the load of the CC where UE30 is located, avoid the reconfiguration of control resources caused by load imbalance, and ensure that users or services can be scheduled in time , to ensure the quality of user communication.

Figure 2 is a schematic flowchart of a load balancing method provided by an embodiment of the present invention, as shown in Figure 2, including steps S201-S203:

S201. The base station acquires a resource occupancy rate of a serving cell of the UE.

It should be noted that the UE is a UE supporting CA, and the serving cell includes a PCell and an SCell of the UE. It is easy to understand that there may be one serving cell of the UE, that is, only a PCell is configured, or there may be 2-5 serving cells, that is, a PCell and 1-4 SCells are configured. If the current serving cell of the UE only has a PCell, only the resource occupancy rate of the PCell can be obtained; otherwise, the resource occupancy rates of the PCell and all SCells need to be obtained.

Optionally, the base station can periodically obtain the resource occupancy rate of the UE serving cell according to a preset period, so as to realize real-time network load balancing. The resource occupancy rate of the base station is used to ensure that the power consumption of the base station is not too large while implementing network load balancing, which is not specifically limited in this embodiment of the present invention.

S202. If the base station determines that the resource occupancy rate of the serving cell of the UE exceeds a preset threshold, determine a target base station that meets the conditions from neighboring base stations of the base station to which the serving cell belongs.

Wherein, the preset threshold is used to judge whether the load of the CC corresponding to the cell exceeds the limit that it can carry, and this value can be specifically obtained according to the configuration of the base station. If the resource occupancy rate of the serving cell of the UE exceeds the preset threshold, it means that the CC corresponding to the serving cell of the UE exceeds the limit that it can carry, and load balancing needs to be performed to reduce the load of the CC.

The signal quality of the UE under the target base station is better than the signal quality of the UE under the base station of the serving cell, and the number of carriers that the UE can perform carrier aggregation under the target base station is greater than the number of carriers that the UE currently performs carrier aggregation under the base station of the serving cell, and The resource occupancy rates of at least two cells where the UE can perform carrier aggregation under the target base station are both lower than a preset threshold. The signal quality of the UE may be specifically measured by measuring a Reference Signal Received Power (Reference Signal Receiving Power, RSRP) obtained by measuring a reference signal sent by the UE, which is not specifically limited in this embodiment of the present invention.

It should be noted that the UE is located in an overlapping area between the base station to which its serving cell belongs and the neighboring base station. In other words, the neighboring base station is a base station whose coverage overlaps with the base station to which the serving cell of the UE belongs. , and the UE is located in the overlapping area.

In addition, it should also be noted that the carrier that the UE can perform carrier aggregation under the base station is the intersection of the carrier set that the base station supports carrier aggregation and the carrier set that the UE itself supports carrier aggregation. Therefore, the number of carriers that the UE can perform carrier aggregation under the base station depends on the number of carriers that the base station supports carrier aggregation and the number of carriers that the UE itself supports carrier aggregation. Exemplarily, a specific example is given for illustration, assuming that the combination of base station 20 supporting carrier aggregation is: carrier 1+carrier 3+carrier 7+carrier 20+carrier 41, and the combination of UE30 supporting carrier aggregation is: carrier 1+carrier 3+carrier 15+carrier 41, then the carriers that the UE30 can perform carrier aggregation under the base station 20 are: carrier 1+carrier 3+carrier 41. Wherein, the carrier X represents the carrier numbered X, for example, the carrier 1 represents the carrier numbered 1.

S203. The base station switches the UE to the target base station.

Specifically, as shown in FIG. 3, step S203 may specifically include steps S2031-S2032:

S2031. The base station determines a target serving cell for the UE from at least two cells under the target base station where the UE can perform carrier aggregation.

Wherein, the target serving cell includes a target primary cell and a target secondary cell.

In an optional implementation mode provided by the embodiment of the present invention, the base station may select one cell from the cells under the target base station where the UE can perform carrier aggregation as the UE's primary cell, and the other cells as the UE's secondary cells.

In another optional implementation manner provided by the embodiment of the present invention, the base station may specifically determine the primary cell and the secondary cell from at least two cells according to resource occupancy rates and signal-to-noise ratios of the at least two cells.

Specifically, according to the resource occupancy rate and signal-to-noise ratio of at least two cells, the target serving cell can be determined according to the following steps S2031a-S2031d:

S2031a. The base station sorts all the cells of the target base station in ascending order of resource occupancy to obtain the first set, and sorts all the cells of the target base station in descending order of signal-to-noise ratio to obtain the second set. gather.

S2031b. The base station determines a first sorting sequence number in the first set and a second sorting sequence number in the second set for each of the at least two cells.

S2031c. The base station determines a comparison factor corresponding to each of the at least two cells according to the first sorting sequence number and the second sorting sequence number of each of the at least two cells in combination with a preset formula.

Wherein, the preset formula includes the following formula (1):

G _i =α×num_E _i +β×num_F _i formula (1)

In the formula, G _i represents the comparison factor corresponding to the i-th cell among at least two cells, num_E _i represents the first sorting number of the i-th cell, num_F _i represents the second sorting number of the i-th cell, and α represents the resource The weight coefficient of the occupancy rate, and β represents the weight coefficient of the signal-to-noise ratio.

Among them, the weight coefficient of the resource occupancy rate and the weight coefficient of the signal-to-noise ratio are adjustable variables, which are respectively used to indicate the importance of the resource occupancy rate and the signal-to-noise ratio in the selection of the primary cell. and the importance of the signal-to-noise ratio to control its size.

S2031d. The base station determines the first cell with the smallest comparison factor among the at least two cells as the target primary cell of the UE, and determines the cells other than the first cell among the at least two cells as the target secondary cells of the UE.

For example, referring to FIG. 4 , it is assumed that under the base station 10, the carriers corresponding to the PCell and the SCell of the UE30 are carrier 2 and carrier 15 respectively, and the resource occupancy rates of the PCell and the SCell of the UE30 exceed a preset threshold, and it is found that the UE30 is in The carriers that can perform carrier aggregation under the adjacent base station 20 are: carrier 1+carrier 3+carrier 41, the corresponding cells are cell 0, cell 1, and cell 2, and the resource occupancy rates of cell 0, cell 1, and cell 2 are equal. is less than the preset threshold, the signal quality of UE30 under base station 20 is better than the signal quality of UE30 under base station 10. At the same time, since the number of carriers for UE30 performing carrier aggregation under base station 20 is 3, UE30 under base station 10 performs carrier aggregation. The number of carriers is 2, so the number of carriers that UE30 can perform carrier aggregation under base station 20 is greater than the number of carriers that UE currently performs carrier aggregation under base station 10, so base station 20 is determined to be a qualified target base station. Assuming that the base station 20 has a total of 10 cells from cell 1 to cell 9, based on the above scheme, the specific process for the base station 10 to determine the target serving cell for the UE 30 is as follows:

S1: The base station 10 sorts cell 0-cell 9 in ascending order of resource occupancy to obtain a first set, and respectively determines the first sorting numbers of cell 0, cell 1, and cell 2 in the first set.

For example, the first set is {cell 0, cell 4, cell 5, cell 7, cell 2, cell 1, cell 9, cell 8, cell 6, cell 3}, then cell 0, cell 1, and cell 2 are in the first The first sorting sequence numbers in the set are 1, 6, 5 in sequence.

S2: The base station 10 sorts cell 0-cell 9 in descending order of signal-to-noise ratio to obtain a second set, and respectively determines the second sorting numbers of cell 0, cell 1, and cell 2 in the second set.

S3: The base station 10 calculates a corresponding comparison factor according to the first sorting sequence number and the second sorting sequence number of the cell 0, the cell 1, and the cell 2 through formula (1).

S4: The base station 10 determines the cell with the smallest comparison factor among the cell 0, the cell 1 and the cell 2 as the target primary cell of the UE30, and determines other cells except this cell as the target secondary cells of the UE30.

For example, assuming that the comparison factors corresponding to cell 0, cell 1, and cell 2 calculated in the previous step are 1.5, 3, and 6 respectively, then cell 0 is determined as the target primary cell of UE30, and cell 1 and cell 2 are determined as the target primary cell of UE30. target secondary cell.

So far, the process of determining the target serving cell for the UE 30 by the base station 10 ends.

It should be understood that the above two methods for determining the target serving cell are only two specific implementation schemes given by the embodiment of the present invention, and the serving cell may also be determined based on other principles during specific implementation, which is not specifically limited in the embodiment of the present invention.

S2032. The base station sends handover signaling to the UE, so that the UE releases the connection with the original serving cell, and establishes a connection with the target serving cell according to the handover signaling.

Wherein, the handover signaling carries the cell number of the target serving cell.

It should be noted that indication information can be carried in the handover signaling to indicate the cell number of the target primary cell, so that all the serving cells indicated in the handover signaling except the target primary cell are target secondary cells In this way, the UE can establish a connection with the target primary cell according to the cell number of the target primary cell, and then the target primary cell configures and activates the secondary cell for the UE according to the cell number of the target secondary cell; Agreed, determine the target primary and secondary cells according to the agreement, for example, it can be agreed that the cell corresponding to the first cell number is the target primary cell, and the remaining cells are target secondary cells. Of course, the above is only a specific implementation manner provided by the embodiment of the present invention, and there may be other alternative solutions in actual implementation, which are not specifically limited in the embodiment of the present invention.

In the load balancing method provided by the embodiment of the present invention, by obtaining the resource occupancy rate of the serving cell of the UE, and after determining that the resource occupancy rate of the serving cell exceeds the preset threshold, it is determined from the base station to which the adjacent cell of the serving cell belongs The target base station, handover the UE from the source base station to the target base station can reduce the load of the CC corresponding to the serving cell of the UE under the source base station. After implementing the same load balancing method for each UE in the coverage area of the source base station, that is It can realize load balancing among CCs under the source base station, so as to avoid the reconfiguration of control resources caused by load imbalance among CCs, thereby ensuring that users or services can be scheduled in time and user communication quality can be guaranteed.

Based on the foregoing method, an embodiment of the present invention further provides a base station 50, as shown in FIG. 5 , including an acquiring unit 501, a determining unit 502, and a switching unit 503.

Wherein, the obtaining unit 501 is configured to obtain the resource occupancy rate of the serving cell of the user equipment UE.

The determining unit 502 is configured to determine a qualified target base station 50 from the base stations 50 to which neighboring cells of the serving cell belong if it is determined that the resource occupancy rate of the serving cell of the UE exceeds a preset threshold;

The switching unit 503 is configured to switch the UE to the target base station 50 .

Among them, the signal quality of the UE under the target base station 50 is better than the signal quality of the UE under the base station 50 of the serving cell, and the number of carriers that the UE can perform carrier aggregation under the target base station 50 is greater than that currently performed by the UE under the base station 50 of the serving cell. The number of aggregated carriers, and the resource occupancy rates of at least two cells where the UE can perform carrier aggregation under the target base station 50 are both lower than a preset threshold.

Optionally, as shown in FIG. 6( a ), in the base station 50 provided in the embodiment of the present invention, the obtaining unit 501 may specifically include: a first obtaining module 5011 .

Wherein, the first acquiring module 5011 is configured to periodically acquire the resource occupancy rate of the serving cell of the UE according to a preset period.

Alternatively, as shown in FIG. 6( b ), the obtaining unit 501 may specifically include: a second obtaining module 5012 .

Wherein, the second obtaining module 5012 is configured to obtain the resource occupancy rate of the UE's serving cell within a preset period of time.

Preferably, as shown in FIG. 7 , in the base station 50 provided in the embodiment of the present invention, the switching unit 503 may specifically include: a determining module 502 and a sending module 503 .

Wherein, the determining module 502 is configured to determine a target serving cell for the UE from at least two cells under the target base station 50 where the UE can perform carrier aggregation.

The sending module 503 is configured to send handover signaling to the UE, so that the UE releases the connection with the original serving cell, and establishes a connection with the target serving cell according to the handover signaling, and the handover signaling carries the cell number of the target serving cell.

Wherein, the target serving cell includes a target primary cell and a target secondary cell.

Specifically, in the base station 50 shown in FIG. 7, the determining module 502 may be specifically used for:

Determine a target serving cell for the UE from the at least two cells according to resource occupancy rates and signal-to-noise ratios of the at least two cells.

Further, the determining module 502 can specifically be used for:

Sorting all the cells of the target base station 50 in descending order of resource occupancy to obtain the first set, and sorting all the cells of the target base station 50 in descending order of signal-to-noise ratio to obtain the second set ;

determining a first order number in the first set and a second order number in the second set for each of the at least two cells;

Determining a comparison factor corresponding to each of the at least two communities according to the first sorting sequence number and the second sorting sequence number of each of the at least two communities, in combination with a preset formula;

A first cell with the smallest comparison factor among the at least two cells is determined as a target primary cell of the UE, and a cell other than the first cell among the at least two cells is determined as a target secondary cell of the UE.

Wherein, the preset formula includes the aforementioned formula (1).

Based on the base station provided by the embodiment of the present invention, by obtaining the resource occupancy rate of the serving cell of the UE, and after determining that the resource occupancy rate of the serving cell exceeds the preset threshold, determine the eligible target from the base station to which the neighboring cell of the serving cell belongs Base station, switching UE from the source base station to the target base station can reduce the load of the CC corresponding to the serving cell of the UE under the source base station. After implementing the same load balancing method for each UE in the coverage area of the source base station, it can realize The load balance between CCs under the source base station is implemented, so as to avoid the control caused by the unbalanced load among CCs.

It should be understood that in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, rather than by the embodiment of the present invention. The implementation process constitutes any limitation.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the above-described device is only illustrated by dividing the above-mentioned functional modules. In practical applications, the above-mentioned functions can be allocated by different Completion of functional modules means that the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working processes of the above-described systems, devices, and units, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, and other various media that can store program codes.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. A load balancing method, characterized in that, comprising: Obtaining the resource occupancy rate of the serving cell of the user equipment UE; If it is determined that the resource occupancy rate of the serving cell of the UE exceeds the preset threshold, determine a qualified target base station from neighboring base stations of the base station to which the serving cell belongs; wherein, the signal quality of the UE under the target base station is better than The signal quality of the UE under the base station to which the serving cell belongs, the number of carriers that the UE can perform carrier aggregation under the target base station is greater than the number of carriers that the UE currently performs carrier aggregation under the base station to which the serving cell belongs, and The resource occupancy rates of at least two cells where the UE can perform carrier aggregation under the target base station are both less than the preset threshold; handover the UE to the target base station. 2. The method according to claim 1, wherein the switching the UE to the target base station comprises: determining a target serving cell for the UE from at least two cells in which the UE can perform carrier aggregation under the target base station, where the target serving cell includes a target primary cell and a target secondary cell; Send handover signaling to the UE, so that the UE releases the connection with the original serving cell, and establishes a connection with the target serving cell according to the handover signaling, the handover signaling carrying the target service The cell number of the cell. 3. The method according to claim 2, wherein the determining a target serving cell for the UE from at least two cells under the target base station where the UE can perform carrier aggregation comprises: Determine a target serving cell for the UE from the at least two cells according to resource occupancy rates and signal-to-noise ratios of the at least two cells. 4. The method according to claim 3, wherein the target serving cell is determined for the UE from the at least two cells according to the resource occupancy rate and signal-to-noise ratio of the at least two cells, include: Sorting all the cells of the target base station in ascending order of resource occupancy to obtain the first set, and sorting all the cells of the target base station in descending order of signal-to-noise ratio to obtain the first set two sets; determining a first order number in the first set and a second order number in the second set for each of the at least two cells; According to the first sorting sequence number and the second sorting sequence number of each of the at least two cells, in combination with a preset formula, determine a comparison factor corresponding to each of the at least two cells, and the preset formula includes: G _i =α×num_E _i +β×num_F _i , wherein G _i represents the comparison factor corresponding to the i-th cell among the at least two cells, and num_E _i represents the first sorting number of the i-th cell, num_F _i represents the second sorting number of the i-th cell, α represents the weight coefficient of the resource occupancy rate, and β represents the weight coefficient of the signal-to-noise ratio; Determining the first cell with the smallest comparison factor among the at least two cells as the target primary cell of the UE, and determining the cells other than the first cell among the at least two cells as the target secondary cells of the UE district. 5. The method according to any one of claims 1-4, wherein the acquiring the resource occupancy rate of the serving cell of the UE comprises: Periodically acquire the resource occupancy rate of the serving cell of the UE according to a preset period, or, The resource occupancy rate of the serving cell of the UE within the preset period is acquired. 6. A base station, comprising: an acquisition unit, a determination unit, and a switching unit; The obtaining unit is configured to obtain the resource occupancy rate of the serving cell of the user equipment UE; The determining unit is configured to, if it is determined that the resource occupancy rate of the serving cell of the UE exceeds a preset threshold, determine a qualified target base station from base stations to which adjacent cells of the serving cell belong; wherein, the UE is in the target The signal quality of the base station is better than the signal quality of the UE under the base station of the serving cell, and the number of carriers that the UE can perform carrier aggregation under the target base station is greater than that currently performed by the UE under the base station of the serving cell The number of carriers for carrier aggregation, and the resource occupancy rates of at least two cells where the UE can perform carrier aggregation under the target base station are both less than the preset threshold; The switching unit is configured to switch the UE to the target base station. 7. The base station according to claim 6, wherein the switching unit comprises: a determining module and a sending module; The determining module is configured to determine a target serving cell for the UE from at least two cells under the target base station where the UE can perform carrier aggregation, and the target serving cell includes a target primary cell and a target secondary cell; The sending module is configured to send handover signaling to the UE, so that the UE releases the connection with the original serving cell, and establishes a connection with the target serving cell according to the handover signaling, and the handover signaling carries the cell number of the target serving cell. 8. The base station according to claim 7, wherein the determining module is specifically used for: Determine a target serving cell for the UE from the at least two cells according to resource occupancy rates and signal-to-noise ratios of the at least two cells. 9. The base station according to claim 8, wherein the determining module is specifically used for: Sorting all the cells of the target base station in ascending order of resource occupancy to obtain the first set, and sorting all the cells of the target base station in descending order of signal-to-noise ratio to obtain the first set two sets; determining a first order number in the first set and a second order number in the second set for each of the at least two cells; According to the first sorting sequence number and the second sorting sequence number of each of the at least two cells, in combination with a preset formula, determine a comparison factor corresponding to each of the at least two cells, and the preset formula includes: G _i =α×num_E _i +β×num_F _i , wherein G _i represents the comparison factor corresponding to the i-th cell among the at least two cells, and num_E _i represents the first sorting number of the i-th cell, num_F _i represents the second sorting number of the i-th cell, α represents the weight coefficient of the resource occupancy rate, and β represents the weight coefficient of the signal-to-noise ratio; Determining the first cell with the smallest comparison factor among the at least two cells as the target primary cell of the UE, and determining the cells other than the first cell among the at least two cells as the target secondary cells of the UE district. 10. The base station according to any one of claims 6-9, wherein the acquiring unit comprises: a first acquiring module or a second acquiring module; The first acquiring module is configured to periodically acquire the resource occupancy rate of the serving cell of the UE according to a preset period; The second acquiring module is configured to acquire the resource occupancy rate of the serving cell of the UE within a preset period of time.