CN106792910B - Load balancing method and device - Google Patents
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Abstract
The invention discloses a load balancing method and a load balancing device, relates to the technical field of communication networks, and aims to solve the problem that signaling overhead of a base station is increased due to frequent switching of cell edge users. The method of the embodiment of the invention obtains the transmitting power of the preset quantity by detecting the transmitting power of the current cell once every preset period; respectively determining a practical power ratio corresponding to each transmitting power, wherein the practical power ratio is the ratio of the transmitting power to the maximum transmitting power of the current cell; and determining a mobile load balancing value according to the practical power ratio corresponding to each transmitting power and the practical power ratio threshold, wherein the mobile load balancing value is the mean square error between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold, and when the mobile load balancing value is greater than a preset value, performing load balancing switching. The scheme provided by the embodiment of the invention is adopted in load balancing.
Description
Technical Field
The present invention relates to the field of communications network technologies, and in particular, to a method and an apparatus for load balancing.
Background
Load balancing is a relatively important technology in the ad hoc network function of an LTE (Long Term Evolution) network, and can solve the problem of uneven load distribution between adjacent cells, so that the load between the adjacent cells is kept in a relatively balanced state. Currently, the mobile load balancing technology in LTE is implemented by switching a part of terminals served by a source cell to a target cell, and the target cell provides services for the switched terminals, and the specific process includes: the source cell monitors the load condition of the source cell, when the source cell monitors that the traffic of the source cell exceeds the bearing capacity, the source cell requests to acquire the load condition of the adjacent cell, a target cell is determined according to the acquired load condition of the adjacent cell and the load needing to be transferred, and the source cell generally selects the adjacent cell with high signal intensity and small load as the target cell. After determining the target cell, the source cell switches a part of terminals served by the source cell to the target cell.
However, since the target cell is randomly determined, when the load of the source cell reaches the maximum load threshold that can be borne by itself, the user at the edge of the source cell is switched to the target cell, which may cause the traffic of the target cell to exceed the bearing capacity of the target cell, and the target cell needs to select another cell and switch a part of terminals served by itself to another cell, which easily causes frequent switching of users at the edge of the cell, and increases the signaling overhead of the base station.
Disclosure of Invention
Embodiments of the present invention provide a load balancing method and apparatus, so as to solve the problem that the signaling overhead of a base station may be increased by the existing load balancing method.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
a method of load balancing, comprising:
detecting the transmitting power of the current cell once every preset period to obtain a preset number of transmitting powers;
respectively determining a practical power ratio corresponding to each transmitting power, wherein the practical power ratio is the ratio of the transmitting power to the maximum transmitting power of the current cell;
determining a mobile load balancing value according to a practical power ratio corresponding to each transmitting power and a practical power ratio threshold, wherein the mobile load balancing value is the mean square error between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold;
and when the mobile load balancing value is larger than a preset value, performing load balancing switching.
An apparatus for load balancing, comprising:
the detecting unit is used for detecting the transmitting power of the current cell once every preset period to obtain the transmitting power of a preset number;
a determining unit, configured to determine a practical power ratio corresponding to each transmission power detected by the detecting unit, where the practical power ratio is a ratio of the transmission power to the maximum transmission power of the current cell;
the determining unit is further configured to determine a mobile load balancing value according to the practical power ratio and the practical power ratio threshold corresponding to each transmission power detected by the detecting unit, where the mobile load balancing value is a mean square error between the practical power ratio corresponding to each transmission power and the practical power ratio threshold;
and the switching unit is used for carrying out load balancing switching when the mobile load balancing value determined by the determining unit is greater than a preset value.
The method and the device for load balancing provided by the embodiment of the invention comprise the steps of firstly, detecting the transmitting power of a current cell once every preset period to obtain the transmitting power of a preset number, respectively determining the practical power ratio corresponding to each transmitting power, determining a mobile load balancing value according to the practical power ratio corresponding to each transmitting power and the practical power ratio threshold, and when the mobile load balancing value is greater than the preset value, carrying out load balancing switching, wherein the mobile load balancing value is the mean square difference of the practical power ratio corresponding to each transmitting power and the practical power ratio threshold; the practical power ratio is the ratio of the transmitting power of the current cell to the maximum transmitting power of the current cell, compared with the cell switching method in the prior art which easily causes frequent switching of cell edge users, in the embodiment of the invention, the mobile load balance value is the mean square difference between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold, that is, the mobile load balance value can reflect the average load condition of the cell in a period of time on the whole, in the prior art, the load condition of the cell changes at any time, if the traffic of the cell exceeds the bearing capacity of the cell in a period of time, the load balance switching can be caused, and most likely, at the next time which is short in time interval with the time, the traffic of the cell can be under the bearing capacity of the cell again (for example, the user on a bus is in the service range of a certain cell, a large amount of data services are requested in a short time), but at this time, part of users served by the cell are already switched to the target cell, and thus, load balancing switching is not necessary, and the mobile load balancing value in the embodiment of the present invention is a constant value in a period of time, so that frequent switching of cell edge users can be effectively prevented when the load is at a critical value, and load balancing switching is more reasonable and effective.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a load balancing method according to an embodiment of the present invention;
fig. 2 is a flowchart of another load balancing method according to an embodiment of the present invention;
fig. 3 is a flowchart of another load balancing method according to an embodiment of the present invention;
fig. 4 is a schematic logic structure diagram of a load balancing apparatus according to an embodiment of the present invention;
fig. 5 is a schematic logic structure diagram of another load balancing apparatus according to an embodiment of the present invention;
fig. 6 is a schematic logical structure diagram of a terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make load balancing switching more reasonable and effective, an embodiment of the present invention provides a load balancing method, as shown in fig. 1, the method includes:
101. and detecting the transmitting power of the current cell once every preset period to obtain the transmitting power of a preset number.
It should be noted that the preset period may be determined according to the detected location of the cell, and if the cell is in a rural area, the traffic volume of the cell is small, which results in low transmission power of the cell, and the possibility that the load condition of the source cell exceeds the service bearing capacity of the source cell is small, so the preset period may be set to be larger; on the contrary, if the cell is in the city, the traffic volume of the cell is relatively high, which results in a large transmitting power of the cell, and because the possibility that the load condition of the source cell exceeds the service bearing capacity of the source cell is high, the preset period can be set to be small, and load balancing switching can be performed in time.
102. And respectively determining the practical power ratio corresponding to each transmitting power.
Wherein, the practical power ratio is the ratio of the transmitting power to the maximum transmitting power of the current cell.
It will be appreciated that the utility power ratio can be expressed by the following equation:
wherein, CellTotalPwr is the transmission power of the current cell, CellMaxPwr is the maximum transmission power of the current cell, and RatioPwr is the practical power ratio corresponding to each transmission power.
It can be understood that the maximum transmission power of the current cell is the maximum value of the sum of all channel powers that the downlink of the cell can simultaneously transmit, and can be determined by an operator according to the actual situation of the cell.
103. And determining a mobile load balancing value according to the practical power ratio corresponding to each transmitting power and the practical power ratio threshold.
It should be noted that, before executing the method flow shown in fig. 1, a practical power ratio threshold should be set in advance, and the practical power ratio threshold is set by an operator according to the actual situation of the cell.
The mobile load balance value is the mean square error between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold.
The mobile load balancing value can be obtained by the following formula:
wherein, ratio pwr _ N is the practical power ratio corresponding to each transmission power, N represents the preset number, N is a positive integer less than or equal to N, ratio pwr _1 represents the transmission power of the first current cell to be detected, and ratio pwr _0 is the practical power ratio threshold.
It should be noted that, because the mobile load balancing value is a mean square error between a certain number of practical power ratios and a practical power ratio threshold in N periods, the mobile load balancing value can reflect the average load level of the cell in N periods as a whole, and compared with that the current transmission power ratio of the cell changes at any time, the mobile load balancing value in N periods is not changed, and can also accurately represent the load condition of the cell in N periods.
104. And when the mobile load balance value is larger than a preset value, performing load balance switching.
It can be understood that the preset value can be set according to the location and actual situation of the cell, for example: if the cell is in the city, the preset value setting is low because the number of terminals served by the cell is large, the network condition is complex, and load balancing switching needs to be frequently performed, and if the cell is in the country, the preset value setting is high. When the mobile load balance value is larger than the preset value, it indicates that the load condition of the cell exceeds the service bearing capacity of the cell within a period of time, and a part of users at the edge of the cell should be switched to the target cell, and the target cell provides service for the switched part of users.
It should be noted that, in the process of performing load balancing handover, after each preset number of terminals are handed over from the source cell to the target cell, the steps 101 to 104 need to be repeatedly performed once, if it is determined that the mobile load balancing value still develops the preset value during the execution of 104, the preset number of terminals are handed over from the source cell to the target cell, and then the steps 101 to 104 are performed again until the load balancing of the mobile terminals is smaller than the preset value.
The load balancing method provided by the embodiment of the invention comprises the steps of firstly, detecting the transmitting power of a current cell once every preset period to obtain the transmitting power of a preset number, respectively determining the practical power ratio corresponding to each transmitting power, determining a mobile load balancing value according to the practical power ratio corresponding to each transmitting power and the practical power ratio threshold, and when the mobile load balancing value is greater than the preset value, carrying out load balancing switching, wherein the mobile load balancing value is the mean square difference between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold; the practical power ratio is the ratio of the transmission power to the maximum transmission power of the current cell. Compared with the cell switching method in the prior art, which easily causes frequent switching of the cell edge users, in the embodiment of the present invention, the mobile load balancing value is the mean square error between the practical power ratio and the practical power ratio threshold, that is, the mobile load balancing value is the mean square error between the practical power ratio and the practical power ratio threshold corresponding to each transmission power, that is, the mobile load balancing value can reflect the average load condition of the cell as a whole within a period of time, in the prior art, the load condition of the cell changes at any time, at a certain time within a period of time, if the traffic of the cell exceeds the bearing capacity of the cell, the load balancing switching is caused, and at a next time with a short time interval from the time, the traffic of the cell is likely to be below the bearing capacity of the cell again (for example, a user on a bus is in the service range of a certain cell, a large amount of data services are requested in a short time), but at this time, part of users served by the cell are already switched to the target cell, and therefore, load balancing switching is not necessary, but the mobile load balancing value in the embodiment of the present invention is a constant value in a period of time, so that frequent switching of cell edge users can be effectively prevented when the load is at a critical value, and load balancing switching is more reasonable and effective.
In order to make the load balancing handover more reasonable, when the cell edge users are handed over, it needs to determine which edge users should be handed over, and based on this, as shown in fig. 2, the step 104, when the mobile load balancing value is greater than the preset value, performing the load balancing handover includes steps 1041 to 1044.
1041. The capability level of each terminal at the edge of the current cell is determined.
The capability level is LTE Category, CAT stands for LTE Category, 3GPP protocol stipulates 9 capability levels, namely CAT1-9, the capability level is used for expressing the transmission rate supported by the terminal, and the transmission rate of the terminal with high capability level is larger than that of the terminal with low capability level.
1042. And selecting a specified number of terminals as the terminals to be switched from the terminals at the edge of the current cell according to the sequence of the capability grades from low to high.
It should be noted that, terminals at the edge of a cell are sorted according to the order of the capability levels from low to high, and a terminal with a lower capability level is used as a terminal to be switched, so that it can be ensured that the terminal with the lower capability level can also obtain better service in a target cell, and the terminal with the higher capability level is more likely to request resources even when the service bearing capability of a source cell is higher than the terminal with the lower capability level because the transmission rate is higher, and the probability that the terminal with the higher capability level is switched to the target cell is smaller when the service bearing capability of the source cell is higher than that of the terminal with the lower capability level.
For example: if the specified number is 5, the number of terminals at the edge of the cell is 7, and the capability level of each terminal is 1, 2, 3, 4, 5, 6 and 7 from low to high in sequence, the first 5 terminals are selected as the terminals to be switched; if the capability level of each terminal is from low to high: 1. 2, 3, and 5, selecting the first 5 terminals as terminals to be switched, and it can be understood that when the terminals at the edge of the cell are sorted according to the order of the capability levels of the terminals from low to high, the two terminals with the capability level of 3 should be arranged between the two terminals with the capability level of 2 and the capability level of 5, but the arrangement order of the two terminals with the capability level of 3 is not limited, and the arrangement manner still conforms to the arrangement order from low to high in this step.
1043. And if the terminals with the specified number are not selected according to the sequence of the capability grades from low to high, randomly selecting the terminals as the terminals to be switched from the terminals which are not selected and have the lowest capability grades at the edge of the current cell until the number of the terminals to be switched reaches the specified number.
It should be noted that, when the capability levels of the remaining unselected terminals at the edge of the current cell are all the same, and it is indicated that the data transmission capabilities of the remaining unselected terminals are all the same, a preset number of terminals may be randomly selected and switched to the target cell, and the switching is stopped until the load condition of the source cell is within the traffic that can be borne by the source cell.
For example: if the specified number is 5, the number of terminals at the edge of the cell is 7, and the capability level of each terminal is as follows from low to high: 1. 2, 3, 5, selecting the first three terminals according to the sequence of the capability grades from low to high, and then randomly selecting two terminals from the terminals with the capability grades of 3 as the terminals to be switched; if the capability level of each terminal is from low to high, the following steps are performed in sequence: 1. 2, 3, 4, after the first three terminals are selected, two terminals should be randomly selected from the last 4 terminals as the terminals to be switched, and since the capability grades of the last 4 terminals are all the same, the default is that the last four terminals are the terminals with the lowest capability grade among the remaining unselected terminals at the cell edge.
1044. And switching the appointed number of terminals to be switched from the current cell to the target cell.
In the invention, the terminal capability grade is used as a basis for selecting the terminals to be switched, and when the terminal capability grades are equal, a preset number of terminals are randomly selected. The terminal with high capability level is easier to provide service for the terminal with low capability level by the source cell compared with the terminal with low capability level because the transmission rate is higher, so that the load balancing switching is more reasonable, and the requirements of cell edge users are further met. In addition, in the embodiment of the invention, the problem of frequent switching of cell edge users is solved, a large amount of signaling interaction is not needed, the signaling overhead of the base station is reduced, the network robustness and controllability are enhanced, and energy conservation and emission reduction are realized to a certain extent.
It should be noted that, in the above embodiment, the case that the capability levels of each terminal at the cell edge are all equal is not considered, and based on this, after determining the capability level of each terminal at the current cell edge in step 1041, step 1045 needs to be executed.
1045. And if the capability grades of all the terminals at the edge of the current cell are equal, randomly selecting a specified number of terminals from the terminals at the edge of the current cell as the terminals to be switched.
It should be noted that, if the capability levels of each terminal at the cell edge are all equal, the data transmission capability of each terminal is equal, and a preset number of terminals can be randomly selected and switched to the target cell, until the load condition of the source cell is within the service volume that can be borne by the source cell, the switching is stopped.
Therefore, the situation that the capability levels of all terminals at the edge of the cell are equal is considered, and the rationality of load balancing switching is further improved.
Corresponding to the method flow shown in fig. 1, in order to make load balancing switching more reasonable and effective, an embodiment of the present invention provides a load balancing apparatus, as shown in fig. 4, the apparatus includes: detection section 401, determination section 402, and switching section 403.
The detecting unit 401 is configured to detect the transmit power of the current cell once every preset period, so as to obtain a preset number of transmit powers.
A determining unit 402, configured to determine a practical power ratio corresponding to each transmit power detected by the detecting unit 401, where the practical power ratio is a ratio of the transmit power to a maximum transmit power of a current cell; according to the practical power ratio and the practical power ratio threshold corresponding to each transmitting power detected by the detecting unit 401, a mobile load balancing value is determined, and the mobile load balancing value is the mean square error between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold.
A switching unit 403, configured to perform load balancing switching when the mobility load balancing value determined by the determining unit 402 is greater than a preset value.
In another embodiment of the present invention, as shown in fig. 5, the apparatus further comprises: a setting unit 404 and a selecting unit 405.
A setting unit 404 for setting a practical power ratio threshold.
A switching unit 403, configured to determine a capability level of each terminal at the edge of the current cell; selecting a specified number of terminals as terminals to be switched from terminals at the edge of the current cell according to the sequence of the capability grades from low to high; if the terminals with the specified number are not selected according to the sequence of the capability grades from low to high, randomly selecting the terminals as the terminals to be switched from the terminals which are not selected and have the lowest capability grades at the edge of the current cell until the number of the terminals to be switched reaches the specified number; and switching the appointed number of terminals to be switched from the current cell to the target cell.
Wherein the capability level is used to indicate a transmission rate supported by the terminal.
A selecting unit 405, configured to randomly select a specified number of terminals from the terminals at the edge of the current cell as terminals to be switched if the capability levels of the terminals determined by the switching unit 403 at the edge of the current cell are all equal.
The load balancing device provided by the embodiment of the invention comprises a detection unit, a determination unit, a switching unit and a load balancing unit, wherein the detection unit detects the transmitting power of a current cell once every preset period to obtain the transmitting power of a preset number, the determination unit determines the practical power ratio corresponding to each transmitting power respectively, and determines a mobile load balancing value according to the practical power ratio corresponding to each transmitting power and the practical power ratio threshold, when the mobile load balancing value is greater than the preset value, the switching unit performs load balancing switching, and the mobile load balancing value is the mean square difference between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold; the practical power ratio is the ratio of the transmission power to the maximum transmission power of the current cell. Compared with the cell switching method in the prior art, which easily causes frequent switching of the cell edge users, in the embodiment of the present invention, the mobile load balancing value is the mean square error between the practical power ratio and the practical power ratio threshold, that is, the mobile load balancing value is the mean square error between the practical power ratio and the practical power ratio threshold corresponding to each transmission power, that is, the mobile load balancing value can reflect the average load condition of the cell as a whole within a period of time, in the prior art, the load condition of the cell changes at any time, at a certain time within a period of time, if the traffic of the cell exceeds the bearing capacity of the cell, the load balancing switching is caused, and at a next time with a short time interval from the time, the traffic of the cell is likely to be below the bearing capacity of the cell again (for example, a user on a bus is in the service range of a certain cell, a large amount of data services are requested in a short time), but at this time, part of users served by the cell are already switched to the target cell, and therefore, load balancing switching is not necessary, but the mobile load balancing value in the embodiment of the present invention is a constant value in a period of time, so that frequent switching of cell edge users can be effectively prevented when the load is at a critical value, and load balancing switching is more reasonable and effective.
An embodiment of the present invention further provides a terminal, as shown in fig. 6, where the terminal is a schematic diagram of a hardware structure of the apparatus described in fig. 4. Wherein, this terminal station can include: memory 601, processor 602, transceiver 603, and bus 604.
The Memory 601 may be a ROM (Read Only Memory), a static Memory device, a dynamic Memory device, or a RAM (Random Access Memory). The memory 601 may store an operating system and other application programs. When the technical solution provided by the embodiment of the present invention is implemented by software or firmware, a program code for implementing the technical solution provided by the embodiment of the present invention is stored in the memory 601 and executed by the processor 602.
The transceiver 603 is used for communication between the apparatus and other devices or communication networks (such as but not limited to ethernet, RAN radio access Network, radio access Network), WLAN (Wireless Local Area Network), etc.).
The processor 602 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, and is configured to execute related programs to implement the technical solutions provided by the embodiments of the present invention.
It should be noted that although the hardware depicted in FIG. 6 only shows the memory 601, processor 602, transceiver 603, and bus 604. However, in the implementation, it will be understood by those skilled in the art that the terminal also includes other components necessary for normal operation. Also, hardware components for performing other functions may be included, as would be apparent to one skilled in the art, according to particular needs.
Specifically, when the terminal shown in fig. 6 is used to implement the apparatus shown in the embodiment of fig. 4, the processor 602 in the terminal is configured to detect the transmission power of the current cell once every preset period, so as to obtain the preset number of transmission powers.
The processor 602 is further configured to determine a practical power ratio corresponding to each transmit power, where the practical power ratio is a ratio of the transmit power to the maximum transmit power of the current cell; and determining a mobile load balance value according to the practical power ratio corresponding to each transmitting power and the practical power ratio threshold, wherein the mobile load balance value is the mean square error between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold.
The processor 602 is further configured to perform load balancing handover when the mobile load balancing value determined by the determining unit 402 is greater than a preset value.
In another implementation provided by an embodiment of the present invention,
the processor 602 is further configured to set a practical power ratio threshold.
A processor 602, further configured to determine a capability level of each terminal at an edge of the current cell; selecting a specified number of terminals as terminals to be switched from terminals at the edge of the current cell according to the sequence of the capability grades from low to high; if the terminals with the specified number are not selected according to the sequence of the capability grades from low to high, randomly selecting the terminals as the terminals to be switched from the terminals which are not selected and have the lowest capability grades at the edge of the current cell until the number of the terminals to be switched reaches the specified number; and switching the appointed number of terminals to be switched from the current cell to the target cell.
Wherein the capability level is used to indicate a transmission rate supported by the terminal.
The processor 602 is further configured to randomly select a preset number of terminals from the terminals at the edge of the current cell as terminals to be switched if the capability levels of each terminal determined by the switching unit 403 at the edge of the current cell are equal.
The terminal provided by the embodiment of the invention comprises the following steps that firstly, a processor detects the transmitting power of a current cell once every preset period to obtain the transmitting power of a preset number, respectively determines the practical power ratio corresponding to each transmitting power, determines the mobile load balance value according to the practical power ratio corresponding to each transmitting power and the practical power ratio threshold, and performs load balance switching when the mobile load balance value is greater than the preset value, wherein the mobile load balance value is the mean square difference between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold; the practical power ratio is the ratio of the transmission power to the maximum transmission power of the current cell. Compared with the cell switching method in the prior art, which easily causes frequent switching of the cell edge users, in the embodiment of the present invention, the mobile load balancing value is the mean square error between the practical power ratio and the practical power ratio threshold, that is, the mobile load balancing value is the mean square error between the practical power ratio and the practical power ratio threshold corresponding to each transmission power, that is, the mobile load balancing value can reflect the average load condition of the cell as a whole within a period of time, in the prior art, the load condition of the cell changes at any time, at a certain time within a period of time, if the traffic of the cell exceeds the bearing capacity of the cell, the load balancing switching is caused, and at a next time with a short time interval from the time, the traffic of the cell is likely to be below the bearing capacity of the cell again (for example, a user on a bus is in the service range of a certain cell, a large amount of data services are requested in a short time), but at this time, part of users served by the cell are already switched to the target cell, and therefore, load balancing switching is not necessary, but the mobile load balancing value in the embodiment of the present invention is a constant value in a period of time, so that frequent switching of cell edge users can be effectively prevented when the load is at a critical value, and load balancing switching is more reasonable and effective.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus necessary general hardware, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be substantially implemented or a part of the technical solutions contributing to the prior art may be embodied in the form of a software product, which is stored in a readable storage medium, such as a floppy disk, a hard disk, or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A method of load balancing, the method comprising:
detecting the transmitting power of the current cell once every preset period to obtain a preset number of transmitting powers;
respectively determining a practical power ratio corresponding to each transmitting power, wherein the practical power ratio is the ratio of the transmitting power to the maximum transmitting power of the current cell;
determining a mobile load balancing value according to a practical power ratio corresponding to each transmitting power and a practical power ratio threshold, wherein the mobile load balancing value is the mean square error between the practical power ratio corresponding to each transmitting power and the practical power ratio threshold;
and when the mobile load balancing value is larger than a preset value, performing load balancing switching.
2. The method according to claim 1, wherein before the detecting the transmission power of the current cell once every preset period to obtain a preset amount of transmission power, the method comprises:
setting the practical power ratio threshold.
3. The method according to claim 2, wherein the performing load balancing switching when the mobile load balancing value is greater than a preset value comprises:
determining the capability level of each terminal at the edge of the current cell;
selecting a specified number of terminals from the terminals at the edge of the current cell as terminals to be switched according to the sequence of the capability grades from low to high;
if the terminals with the specified number are not selected according to the sequence of the capability grades from low to high, randomly selecting the terminals as the terminals to be switched from the terminals which are not selected and have the lowest capability grades at the edge of the current cell until the number of the terminals to be switched reaches the specified number;
and switching the appointed number of terminals to be switched from the current cell to the target cell.
4. The method of load balancing according to claim 3, wherein after said determining the capability level of each terminal at the edge of the current cell, the method further comprises:
and if the capability grades of all the terminals at the edge of the current cell are equal, randomly selecting a specified number of terminals from the terminals at the edge of the current cell as the terminals to be switched.
5. The method of load balancing according to any one of claims 3-4,
the capability level is used to indicate a transmission rate supported by the terminal.
6. An apparatus for load balancing, the apparatus comprising:
the detecting unit is used for detecting the transmitting power of the current cell once every preset period to obtain the transmitting power of a preset number;
a determining unit, configured to determine a practical power ratio corresponding to each transmission power detected by the detecting unit, where the practical power ratio is a ratio of the transmission power to the maximum transmission power of the current cell;
the determining unit is further configured to determine a mobile load balancing value according to the practical power ratio and the practical power ratio threshold corresponding to each transmission power detected by the detecting unit, where the mobile load balancing value is a mean square error between the practical power ratio corresponding to each transmission power and the practical power ratio threshold;
and the switching unit is used for carrying out load balancing switching when the mobile load balancing value determined by the determining unit is greater than a preset value.
7. The apparatus for load balancing according to claim 6, further comprising:
a setting unit for setting the practical power ratio threshold.
8. The apparatus for load balancing according to claim 7,
the switching unit is further configured to determine a capability level of each terminal at the edge of the current cell;
selecting a specified number of terminals from the terminals at the edge of the current cell as terminals to be switched according to the sequence of the capability grades from low to high; if the terminals with the specified number are not selected according to the sequence of the capability grades from low to high, randomly selecting the terminals as the terminals to be switched from the terminals which are not selected and have the lowest capability grades at the edge of the current cell until the number of the terminals to be switched reaches the specified number; and switching the appointed number of terminals to be switched from the current cell to the target cell.
9. The apparatus for load balancing according to claim 8, further comprising:
and the selecting unit is used for randomly selecting a specified number of terminals from the terminals at the edge of the current cell as the terminals to be switched if the capability grades of each terminal determined by the switching unit at the edge of the current cell are equal.
10. The apparatus for load balancing according to any one of claims 8 to 9,
the capability level is used to indicate a transmission rate supported by the terminal.
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| CN107484208B (en) * | 2017-08-30 | 2021-01-26 | 广东工业大学 | Load balancing algorithm and system for heterogeneous network |
| CN109379748B (en) * | 2018-12-29 | 2021-10-26 | 京信网络系统股份有限公司 | Cell division method and device of signal receiving and transmitting unit and computer equipment |
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