CN105916178B - A kind of method and device of load balancing - Google Patents

Abstract

The embodiment of the invention discloses a kind of method and devices of load balancing, are related to field of communication technology, can improve the communication quality of terminal in the case where proof load equilibrium.The method of the embodiment of the present invention comprises determining that first community, the first community are the cell that signal strength is greater than first threshold in the adjacent cell of main plot, and the main plot is the cell in overload；When the first community includes at least two cell, determine that the baseline scale value of each first community, the baseline scale value are used to indicate average signal Yu interference plus noise the ratio SINR of all terminals in cell；The first community for determining that the baseline scale value is greater than second threshold is Target cell；Target terminal in the main plot is accessed into the Target cell.The present invention is suitable for load balancing process.

Description

Method and device for load balancing

technical field

The present invention relates to the field of communication technologies, and in particular, to a method and device for load balancing.

Background technique

During the communication process, the terminal can select PCell (English: Primary Cell, Chinese: Primary Cell) according to its own needs, which often leads to multiple eNBs under the same eNB (English: Evolved Node B, Chinese: Evolved Base Station). The load is uneven among the cells. That is, a large number of terminals may reside in some cells, and because the resources in the cell are limited, network congestion is caused and the communication quality of the terminals in the cell is affected; while in other cells, the number of terminals is small or the There is too much resource redundancy due to a small number of services, which means that the resources in these cells are not fully utilized, resulting in a waste of spectrum resources.

In order to solve the problem of unbalanced load between cells, when the eNB detects that the load of the cell exceeds a preset threshold, it determines that the cell is overloaded, and starts a load balancing process. That is, by switching some terminals in a cell that is already in an overloaded state to a cell with a smaller surrounding load, load balance is achieved between cells.

However, in the above-mentioned manner to achieve load balancing, only the load conditions of each cell are considered. That is to say, when the terminal is switched from the source cell to the target cell, although the communication quality of other terminals in the source cell is guaranteed, after the terminal accesses the target cell, the load of the target cell tends to increase, which not only affects the When the communication quality of each terminal in the target cell is reached, the communication quality of the terminal itself cannot be guaranteed.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a load balancing method and device, which can improve the communication quality of a terminal under the condition of ensuring load balancing.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

In a first aspect, an embodiment of the present invention provides a load balancing method, the method includes:

Determine a first cell, the first cell is a cell whose signal strength is greater than a first threshold in the adjacent cells of the primary cell, and the primary cell is a cell in an overload state;

When the first cell includes at least two cells, determine a reference ratio value of each first cell, where the reference ratio value is used to represent the average signal-to-interference-plus-noise ratio SINR of all terminals in the cell;

determining that the first cell whose reference ratio value is greater than the second threshold is the target cell;

The target terminal in the primary cell is connected to the target cell.

In a second aspect, an embodiment of the present invention provides an apparatus for load balancing, where the apparatus includes:

a determining unit, configured to determine a first cell, where the first cell is a cell whose signal strength is greater than a first threshold in neighboring cells of the primary cell, and the primary cell is a cell in an overload state;

The determining unit is further configured to, when the first cell includes at least two cells, determine a reference ratio value of each first cell, where the reference ratio value is used to represent the average signal and interference addition of all terminals in the cell. Noise ratio SINR;

The determining unit is further configured to determine that the first cell whose reference ratio value is greater than the second threshold is a target cell;

A handover unit, configured to connect the target terminal in the primary cell to the target cell determined by the determining unit.

In a load balancing method and device provided by an embodiment of the present invention, a neighboring cell whose signal strength is greater than a first threshold in a cell in an overload state is determined as the first cell, and if the first cell includes at least two cells, the cell is determined as the first cell. The first cell in which the average SINR of all terminals in the cell is greater than the second threshold is determined as the target cell, and then the target terminals in the overloaded cell are handed over to the target cell for communication. Compared with the prior art, because the terminal switches from the source cell to the target cell, the load of the target cell increases, which affects the communication quality of each terminal in the target cell, and at the same time, the terminal itself cannot be guaranteed after accessing the target cell. Communication quality, the present invention filters the adjacent cells of the overloaded cell by signal strength and the average SINR of all terminals in the cell, and uses the cell with better communication quality as the target cell, so that when the terminal switches from the source cell to the target cell, the target cell Each terminal of the target cell will not affect the communication quality because the load of the target cell increases. At the same time, since the terminal accesses a cell with better communication quality for communication, the communication quality of the terminal itself can also be guaranteed. Therefore, the communication quality of the terminal can be improved under the condition of ensuring load balance.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a flowchart of a method for load balancing provided by an embodiment of the present invention;

FIG. 2 is a flowchart of another method for load balancing provided by an embodiment of the present invention;

FIG. 3 is a flowchart of another method for load balancing provided by an embodiment of the present invention;

FIG. 4 is a flowchart of another method for load balancing provided by an embodiment of the present invention;

FIG. 5 is a flowchart of another method for load balancing provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an apparatus for load balancing provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

An embodiment of the present invention provides a method for load balancing. As shown in FIG. 1 , the method can be executed by a base station, and the method flow includes:

101. Determine a first cell.

The first cell is a cell whose signal strength is greater than the first threshold among neighboring cells of the primary cell, and the primary cell is a cell in an overload state.

The base station receives the measurement report reported by the terminal, wherein the measurement report includes the RSRP (English: Reference Signal Receiving Power, Chinese: Reference Signal Received Power) measurement results of the primary cell where the target terminal is located and its neighboring cells, the resource occupancy rate of each cell, The number of terminals in each cell and the SINR (English: Signal to Interference plus Noise Ratio, Chinese: Signal to Interference plus Noise Ratio, Chinese: Signal to Interference plus Noise Ratio) of each terminal in the cell.

Each cell has a certain bearing capacity, if the bearing capacity is exceeded, it is overloaded. The load situation of each cell is counted and evaluated, and the parameters that can affect the load of the cell may include at least one of the maximum number of terminals, available wireless resources, and hardware load indicators. The present invention can use the terminal quantity evaluation to characterize the load situation of the cell.

According to the number of terminals in each cell in the measurement report, the load size of each cell can be determined, combined with a preset overload threshold, where the overload threshold is a fixed and adjustable threshold for distinguishing overloaded cells from non-overloaded cells. In this embodiment of the present invention, it may be determined that a cell with the number of terminals greater than the overload threshold is an overloaded cell, and a cell with the number of terminals less than or equal to the overload threshold is a non-overloaded cell. When the base station determines that the primary cell is an overloaded cell, it acquires a measurement report generated within a preset time, and obtains the RSRP of the neighboring cell of the primary cell where the target terminal is located. The preset time refers to a period of time before the current time, and the current time refers to the time when the base station determines that the primary cell is overloaded. Considering that although the state of the cell will change with time, the state of two adjacent moments will not be significantly different. Therefore, the state of the cell for a period of time before the current moment can basically represent the current moment. the cell status. That is to say, the data collected during this period can reflect the state of the primary cell at the current moment. If the RSRP of the neighboring cell is greater than the first threshold Th_1, the neighboring cell is determined to be the first cell. It should be noted that the overload threshold and preset time here may be constants preset by those skilled in the art according to historical experience or actual requirements.

102. When the first cell includes at least two cells, determine a reference ratio value of each first cell.

The reference ratio value is used to represent the average SINR of all terminals in the cell.

According to the formula Proportion_Ti=∑(SINRk_Ti)/Num_Ti, through calculation, the reference proportion value of the i-th first cell is obtained.

Among them, SINRk_Ti is the SINR value reported by the k-th terminal in the i-th first cell at the current moment, i and k are both positive integers greater than 0, and Num_Ti is the number of terminals reported by each first cell within the preset time .

103. Determine the first cell whose reference ratio value is greater than the second threshold as the target cell.

When the reference proportional value Proportion_Ti of the i-th first cell satisfies the formula Proportion_Ti≧Th_2, the first cell is determined as the target cell. Among them, Th_2 is the second threshold.

104. Access the target terminal in the primary cell to the target cell.

After determining the target cell, the base station can send a reconfiguration RRC (English: Radio ResourceControl, Chinese: Radio Resource Control Protocol) Connection Reconfigration message to the target terminal, triggering the target terminal to initiate a handover action; when the target terminal completes the cell handover, the target terminal to the base station Send the RRC ConnectionReconfigration Complete message to inform the base station that the terminal has accessed the target cell; after receiving the RRCConnection Reconfigration Complete message, the base station releases the resources occupied by the terminal in the source cell. The source cell refers to the terminal connected to the target cell before accessing the target cell into the main area.

In a load balancing method provided by an embodiment of the present invention, a neighboring cell whose signal strength is greater than a first threshold in a cell in an overload state is determined as the first cell, and if the first cell includes at least two cells, all cells in the cell are The first cell whose average SINR of the terminal is greater than the second threshold is determined as the target cell, and then the target terminal in the overloaded cell is handed over to the target cell for communication. Compared with the prior art, because the terminal switches from the source cell to the target cell, the load of the target cell increases, which affects the communication quality of each terminal in the target cell, and at the same time, the terminal itself cannot be guaranteed after accessing the target cell. Communication quality, the present invention filters the adjacent cells of the overloaded cell by signal strength and the average SINR of all terminals in the cell, and uses the cell with better communication quality as the target cell, so that when the terminal switches from the source cell to the target cell, the target cell Each terminal of the target cell will not affect the communication quality because the load of the target cell increases. At the same time, since the terminal accesses a cell with better communication quality for communication, the communication quality of the terminal itself can also be guaranteed. Therefore, the communication quality of the terminal can be improved under the condition of ensuring load balance.

In order to ensure that the terminal does not cause large-scale network migration due to excessive changes in the network environment during the cell handover process, in an implementation manner of the embodiment of the present invention, the terminal may be handed over to a cell whose communication quality is similar to that of the primary cell. cell to communicate. Therefore, based on the implementation manner shown in FIG. 1 , the implementation manner shown in FIG. 2 can also be implemented. Wherein, step 103 determines that the first cell with the reference ratio value greater than the second threshold is the target cell, which can be specifically implemented as step 1031. When the first cell includes at least two cells in step 102, the reference for each first cell is determined. After the proportional value, steps 105 to 107 can also be performed:

1031. When there is one second cell in the first cell, determine that the second cell is the target cell.

The second cell is a cell whose reference ratio value is greater than the second threshold.

105. When there are at least two second cells in the first cell, determine the reference ratio value of the primary cell and the reference ratio value of the secondary cell of the target terminal.

According to the formula Proportion_P=∑(SINRk_P)/Num_P, through calculation, the reference proportion value Proportion_P of the primary cell is obtained. Wherein, SINRk_P is the SINR value reported by the kth terminal in the primary cell at the current moment, and Num_P is the number of terminals reported by the primary cell within a preset time.

According to the formula Proportion_P_S=∑(SINRk_S)/Num_P_S, through calculation, the reference proportional value Proportion_P_S of the secondary cell of the target terminal is obtained. Wherein, SINRk_S is the SINR value reported by the kth terminal in the secondary cell of the target terminal at the current moment, and Num_P_S is the number of terminals reported by the secondary cell of the target terminal within the preset time.

106. Determine an average value of the reference ratio value of the primary cell and the reference ratio value of each secondary cell of the target terminal.

107. Determine a second cell whose first absolute value is less than a third threshold as a target cell.

The first absolute value is the absolute value of the difference between the reference ratio value of the second cell and the average value.

When the reference proportional value Proportion_Ti of the i-th second cell satisfies the formula |Proportion_Ti-(Proportion_P+Proportion_P_S)/(m+1)|≤Th_3, the first cell is determined as the target cell. Wherein, m is a positive integer less than or equal to 5, indicating the number of secondary cells of the target terminal, and Th_3 is the third threshold. Since in the LTE (English: Long Term Evolution, Chinese: Long Term Evolution) Rel-10 protocol, a terminal can aggregate up to 5 secondary carriers, therefore, m is a positive integer less than or equal to 5.

In a load balancing method provided by an embodiment of the present invention, a cell with a reference ratio value greater than a second threshold is determined as a second cell, and if there is a second cell in the first cell, the second cell is determined as a target cell, If there are at least two second cells in the first cell, a cell whose difference between the reference ratio value and the average value is less than a third threshold is determined as the target cell. Compared with the prior art, when the terminal is switched from the source cell to the target cell, the load of the target cell is increased, thereby affecting the communication quality of each terminal in the target cell, and the communication quality of the terminal itself cannot be guaranteed. By screening the second cell by the difference between the reference ratio value and the average value, the terminal can be switched to a cell with a communication quality similar to that of the primary cell, so that the communication quality of the access cell will not be too great before and after the terminal switches the cell. The change can avoid the degradation of the communication quality of the access cell after the terminal switches the cell, resulting in the terminal switching again due to the poor communication quality of the terminal, and can avoid the load of the target cell from increasing after the terminal switches the cell, resulting in the degradation of the communication quality of the target cell. The terminal in the target cell is handed over, resulting in large-scale network migration. Therefore, using the above method can ensure that the communication quality of the terminal can be improved in the case of load balancing, and can avoid large-scale network migration caused by excessive changes in the network environment.

In order to improve the communication quality after the terminal accesses the target cell, in an implementation manner of the embodiment of the present invention, the target cell needs to have strong carrier aggregation capability and strong resource transmission capability, which means that the target terminal can be Handover to a cell with stronger comprehensive capability for communication. Among them, the comprehensive capability is used to represent the carrier aggregation capability and the resource transmission capability. Therefore, based on the implementation manner shown in FIG. 2 , the implementation manner shown in FIG. 3 can also be implemented. Wherein, step 107 determines that the second cell whose first absolute value is less than the third threshold is the target cell, which can be specifically implemented as step 1071, and in step 106, the reference ratio value of the primary cell and the reference ratio of each secondary cell of the target terminal are determined. After averaging the values, steps 108 and 109 can also be performed:

1071. When there is a third cell in the second cell, determine that the third cell is the target cell. The third cell is a cell whose first absolute value is smaller than the third threshold.

108. When there are at least two third cells in the second cell, determine a capability parameter of each third cell.

The capability parameter is used to reflect the number of secondary cells that can be aggregated by the third cell, the resource occupancy rate of the third cell, and the resource occupancy rate of the secondary cells that can be aggregated by the third cell.

According to the formula Capability_Ti_Sj=α[(1+n)/5]+β[∑(PRB_Ti+PRB_Ti_Sj)/n], and α+β=1, the capability parameter Capability_Ti_Sj of the ith third cell is obtained through calculation.

Wherein, α is the carrier aggregation capability factor, which is a value greater than or equal to 0 and less than or equal to 1, and is used to represent the weight of the cell carrier aggregation capability in the cell comprehensive capability. β is a resource transmission capability factor, which is a number greater than or equal to 0 and less than or equal to 1, and is used to represent the weight of the cell resource transmission capability in the comprehensive cell capability. It should be noted that the values of α and β can be set according to network expectations or terminal service requirements. When the target cell is expected to have strong carrier aggregation capability, a larger α can be set, and it is expected that the target cell has a strong carrier aggregation capability. When the resource transmission capability is used, a larger β can be set.

n is a positive integer less than or equal to 5, indicating the number of secondary carriers corresponding to the ith third cell, PRB_Ti is the resource idle rate of the ith third cell, and PRB_Ti_Sj is the jth corresponding to the ith third cell Resource idle rate of the secondary cell. In this embodiment of the present invention, the resource idle rate may be obtained according to the resource occupancy rate in the measurement report obtained within a preset time, i is a positive integer greater than 0, and j is a positive integer less than or equal to n.

109. Determine the third cell whose capability parameter is greater than the fourth threshold as the target cell.

When the capability parameter Capability_Ti_Sj of the ith third cell satisfies the formula Capability_Ti_Sj≧Th_4, the third cell is determined as the target cell. Among them, Th_4 is the fourth threshold.

In a load balancing method provided by an embodiment of the present invention, a cell whose difference between a reference ratio value and an average value is less than a third threshold is determined as a third cell, and if there is a third cell in the second cell, the third cell is determined is the target cell, and if there are at least two third cells in the second cell, the third cell whose capability parameter is greater than the fourth threshold is determined as the target cell. Compared with the prior art, when the terminal is switched from the source cell to the target cell, the load of the target cell is increased, thereby affecting the communication quality of each terminal in the target cell, and the communication quality of the terminal itself cannot be guaranteed. The third cell is screened by the carrier aggregation capability and the resource transmission capability of the cell, and the terminal can be switched to the cell with the carrier aggregation capability and the resource transmission capability stronger for communication. Since the cell with stronger comprehensive capability has better communication quality, switching the terminal to the cell with stronger comprehensive capability for communication means that the communication quality of the terminal can be improved. Therefore, the adoption of the method can ensure that the communication quality after the terminal accesses the target cell can be further improved under the condition of load balancing.

In order to determine the only target cell with stronger comprehensive capability, in an implementation manner of the embodiment of the present invention, the target cell may be the cell with the strongest comprehensive capability, and then the target terminal is handed over to the cell with the strongest comprehensive capability for communication. Therefore, based on the implementation manner shown in FIG. 3 , the implementation manner shown in FIG. 4 can also be implemented. Wherein, step 109 determines that the third cell whose capability parameter is greater than the fourth threshold is the target cell, which can be specifically implemented as step 1091, and when step 108 is executed, when there are at least two third cells in the second cell, determine each third cell After the capability parameters of , you can also perform step 110:

1091. When there is a fourth cell in the third cell, determine that the fourth cell is the target cell.

The fourth cell is the third cell whose capability parameter is greater than the fourth threshold.

110. When there are at least two fourth cells in the third cell, determine that among the at least two fourth cells, the cell with the largest capability parameter is the target cell.

When there are at least two fourth cells in the third cell, the fourth cells may be sorted according to the capability parameters in descending order, and the sorting result of the capability parameters may be recorded as set A, that is, A={A1≥A2≥… ...≥Ax}, where x is a positive integer greater than 0. In the embodiment of the present invention, the cell with the largest capability parameter in A may be selected as the target cell.

In a load balancing method provided by an embodiment of the present invention, a third cell whose capability parameter is greater than a fourth threshold is determined as a fourth cell, and if there is a fourth cell in the third cell, the fourth cell is determined as a target cell , and if there are at least two fourth cells in the third cell, the cell with the largest capability parameter is determined as the target cell. Compared with the prior art, when the terminal is switched from the source cell to the target cell, the load of the target cell is increased, thereby affecting the communication quality of each terminal in the target cell, and the communication quality of the terminal itself cannot be guaranteed. By determining the cell with the strongest comprehensive capability as the target cell, the only target cell with stronger comprehensive capability can be determined, so that the terminal can be switched to the cell with the strongest comprehensive capability for communication. Since the cell with the stronger comprehensive capability has better communication quality, switching the terminal to the cell with the strongest comprehensive capability for communication can improve the communication quality of the terminal. Therefore, the method can ensure that only one target cell is determined in the case of load balancing, thereby improving the communication quality after the terminal accesses the target cell.

In order to improve the communication quality of the terminal after completing the cell handover, in an implementation manner of the embodiment of the present invention, a secondary carrier may be configured for the terminal having the carrier aggregation capability. Therefore, based on the implementation manner shown in FIG. 1 , the implementation manner shown in FIG. 5 can also be implemented. Wherein, after step 103 is performed to determine that the first cell whose reference ratio value is greater than the second threshold is the target cell, step 111 may also be performed:

111. Configure a secondary cell corresponding to the target cell for the target cell.

If the target terminal has the capability of carrier aggregation, the base station can actively configure the secondary cell corresponding to the target cell for the target cell according to the resource occupancy rate of the target cell, or the base station can configure the target cell for the target cell after receiving the request from the terminal that the secondary carrier needs to be added. the corresponding secondary cell.

It should be noted that, in this embodiment of the present invention, the first threshold, the second threshold, the third threshold, and the fourth threshold may be constants set by those skilled in the art according to experience or design requirements.

In a load balancing method provided by an embodiment of the present invention, after a target cell is determined, a corresponding secondary cell is configured for the target cell. Compared with the prior art, when the terminal is switched from the source cell to the target cell, the load of the target cell is increased, thereby affecting the communication quality of each terminal in the target cell, and the communication quality of the terminal itself cannot be guaranteed. By configuring the corresponding secondary cell for the target cell, the transmission bandwidth of the terminal can be increased, the data transmission rate of the terminal can be improved, and the communication quality after the terminal accesses the target cell can be effectively improved. Therefore, the adoption of the method can ensure that the communication quality after the terminal accesses the target cell can be effectively improved under the condition of load balancing.

An embodiment of the present invention provides an apparatus 20 for load balancing. As shown in FIG. 6 , the apparatus 20 is configured to execute any one of the methods in FIGS. 1 to 5 , and the apparatus 20 includes:

The determining unit 201 is configured to determine a first cell, where the first cell is a cell whose signal strength is greater than a first threshold among neighboring cells of the primary cell, and the primary cell is a cell in an overload state.

The determining unit 201 is further configured to determine a reference ratio value of each first cell when the first cell includes at least two cells, where the reference ratio value is used to represent the average signal-to-interference-plus-noise ratio SINR of all terminals in the cell.

The determining unit 201 is further configured to determine the first cell whose reference ratio value is greater than the second threshold as the target cell.

The switching unit 202 is configured to connect the target terminal in the primary cell to the target cell determined by the determining unit 201 .

In an implementation manner of the embodiment of the present invention, the determining unit 201 is specifically configured to, when there is a second cell in the first cell, determine that the second cell is the target cell, and the second cell is the one whose reference ratio value is greater than the second threshold. community.

The determining unit 201 is further configured to determine the reference ratio value of the primary cell and the reference ratio value of the secondary cell of the target terminal when there are at least two second cells in the first cell.

The determining unit 201 is further configured to determine the average value of the reference ratio value of the primary cell and the reference ratio value of each secondary cell of the target terminal.

The determining unit 201 is further configured to determine the second cell whose first absolute value is less than the third threshold as the target cell, and the first absolute value is the absolute value of the difference between the reference ratio value and the average value of the second cell.

In an implementation manner of the embodiment of the present invention, the determining unit 201 is specifically configured to, when there is a third cell in the second cell, determine that the third cell is the target cell, and the third cell is that the first absolute value is smaller than the third threshold 's district.

The determining unit 201 is further configured to determine a capability parameter of each third cell when there are at least two third cells in the second cell, where the capability parameter is used to reflect the number of secondary cells that can be aggregated by the third cell, the third cell and the resource occupancy rate of the secondary cell that can be aggregated by the third cell.

The determining unit 201 is further configured to determine a third cell whose capability parameter is greater than the fourth threshold as a target cell.

In an implementation manner of the embodiment of the present invention, the determining unit 201 is specifically configured to, when there is a fourth cell in the third cell, determine that the fourth cell is the target cell, and the fourth cell is the cell whose capability parameter is greater than the fourth threshold .

The determining unit 201 is further configured to determine, when there are at least two fourth cells in the third cell, the cell with the largest capability parameter among the at least two fourth cells as the target cell.

In an implementation manner of the embodiment of the present invention, the apparatus 20 further includes:

The configuring unit 203 is configured to configure the secondary cell corresponding to the target cell for the target cell determined by the determining unit 201 .

In an apparatus for load balancing provided by an embodiment of the present invention, a neighboring cell whose signal strength is greater than a first threshold in a cell in an overload state is determined as a first cell, and if the first cell includes at least two cells, all cells in the cell are The first cell whose average SINR of the terminal is greater than the second threshold is determined as the target cell, and then the target terminal in the overloaded cell is handed over to the target cell for communication. Compared with the prior art, because the terminal switches from the source cell to the target cell, the load of the target cell increases, which affects the communication quality of each terminal in the target cell, and at the same time, the terminal itself cannot be guaranteed after accessing the target cell. Communication quality, the present invention filters the adjacent cells of the overloaded cell by signal strength and the average SINR of all terminals in the cell, and uses the cell with better communication quality as the target cell, so that when the terminal switches from the source cell to the target cell, the target cell Each terminal of the target cell will not affect the communication quality because the load of the target cell increases. At the same time, since the terminal accesses a cell with better communication quality for communication, the communication quality of the terminal itself can also be guaranteed. Therefore, the communication quality of the terminal can be improved under the condition of ensuring load balance.

Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the apparatus embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for related parts.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and the program is During execution, it may include the processes of the embodiments of the above-mentioned methods. The storage medium may be a magnetic disk, an optical disc, a read-only memory (English: Read-Only Memory, ROM for short) or a random access memory (English: Random Access Memory, RAM for short).

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or substitutions. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (8)

1. A method for load balancing, wherein the method comprises: Determine a first cell, the first cell is a cell whose signal strength is greater than a first threshold in the adjacent cells of the primary cell, and the primary cell is a cell in an overload state; When the first cell includes at least two cells, determine a reference ratio value of each first cell, where the reference ratio value is used to represent the average signal-to-interference-plus-noise ratio SINR of all terminals in the cell; determining that the first cell whose reference ratio value is greater than the second threshold is the target cell; access the target terminal in the primary cell to the target cell; The determining that the first cell whose reference ratio value is greater than the second threshold is a target cell includes: When there is a second cell in the first cell, determining that the second cell is the target cell, and the second cell is a cell whose reference ratio value is greater than the second threshold; After the determining the reference ratio value of each first cell, the method includes: When there are at least two second cells in the first cell, determining the reference ratio value of the primary cell and the reference ratio value of the secondary cell of the target terminal; determining the average value of the reference ratio value of the primary cell and the reference ratio value of each secondary cell of the target terminal; The second cell whose first absolute value is smaller than the third threshold is determined as the target cell, and the first absolute value is the absolute value of the difference between the reference ratio value of the second cell and the average value. 2. The method according to claim 1, wherein the determining that the second cell whose first absolute value is smaller than the third threshold is the target cell, comprising: When there is a third cell in the second cell, determining that the third cell is the target cell, and the third cell is a cell whose first absolute value is less than the third threshold; After the determining the average value of the reference ratio value of the primary cell and the reference ratio value of each secondary cell of the target terminal, including: When there are at least two third cells in the second cell, determine a capability parameter of each third cell, where the capability parameter is used to reflect the number of secondary cells that can be aggregated by the third cell and the resource occupation of the third cell rate, and the resource occupancy rate of the secondary cells that can be aggregated by the third cell; A third cell whose capability parameter is greater than a fourth threshold is determined to be the target cell. 3. The method according to claim 2, wherein the determining that a third cell whose capability parameter is greater than a fourth threshold is the target cell comprises: When there is a fourth cell in the third cell, determining that the fourth cell is the target cell, and the fourth cell is a cell whose capability parameter is greater than the fourth threshold; After the determining the capability parameter of each third cell, including: When there are at least two fourth cells in the third cell, it is determined that among the at least two fourth cells, the cell with the largest capability parameter is the target cell. 4. The method according to any one of claims 1 to 3, wherein after determining the target cell, comprising: A secondary cell corresponding to the target cell is configured for the target cell. 5. An apparatus for load balancing, wherein the apparatus comprises: a determining unit, configured to determine a first cell, where the first cell is a cell whose signal strength is greater than a first threshold in neighboring cells of the primary cell, and the primary cell is a cell in an overload state; The determining unit is further configured to, when the first cell includes at least two cells, determine a reference ratio value of each first cell, where the reference ratio value is used to represent the average signal and interference addition of all terminals in the cell. Noise ratio SINR; The determining unit is further configured to determine that the first cell whose reference ratio value is greater than the second threshold is a target cell; a switching unit, configured to access the target terminal in the primary cell to the target cell determined by the determining unit; The determining unit is specifically configured to, when there is a second cell in the first cell, determine that the second cell is the target cell, and the second cell is that the reference ratio value is greater than the second cell threshold cell; The determining unit is further configured to determine the reference ratio value of the primary cell and the reference ratio value of the secondary cell of the target terminal when there are at least two second cells in the first cell; The determining unit is further configured to determine the average value of the reference ratio value of the primary cell and the reference ratio value of each secondary cell of the target terminal; The determining unit is further configured to determine the second cell whose first absolute value is less than the third threshold as the target cell, and the first absolute value is the difference between the reference ratio value of the second cell and the average value. absolute value. 6. The apparatus according to claim 5, wherein the determining unit is specifically configured to determine that the third cell is the target cell when there is a third cell in the second cell, and the the third cell is a cell whose first absolute value is less than the third threshold; The determining unit is further configured to determine a capability parameter of each third cell when there are at least two third cells in the second cell, where the capability parameter is used to reflect the capability of the secondary cells that can be aggregated by the third cell. the number, the resource occupancy rate of the third cell, and the resource occupancy rate of the secondary cells that can be aggregated by the third cell; The determining unit is further configured to determine a third cell whose capability parameter is greater than a fourth threshold as the target cell. 7 . The apparatus according to claim 6 , wherein the determining unit is specifically configured to, when a fourth cell exists in the third cell, determine that the fourth cell is the target cell, and the the fourth cell is a cell whose capability parameter is greater than the fourth threshold; The determining unit is further configured to, when there are at least two fourth cells in the third cell, determine that among the at least two fourth cells, the cell with the largest capability parameter is the target cell. 8. The device according to any one of claims 5 to 7, wherein the device further comprises: A configuration unit, configured to configure a secondary cell corresponding to the target cell for the target cell determined by the determining unit.