CN102740364B - Load equalization method and device - Google Patents
Load equalization method and device Download PDFInfo
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- CN102740364B CN102740364B CN201210208044.4A CN201210208044A CN102740364B CN 102740364 B CN102740364 B CN 102740364B CN 201210208044 A CN201210208044 A CN 201210208044A CN 102740364 B CN102740364 B CN 102740364B
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Abstract
The invention discloses a kind of load equalization method and device.Wherein, this method includes：Obtain average load of this cell within the predetermined balanced cycle；Judge the difference whether average load is more than between load balancing thresholding and load balancing amount of hysteresis, in the case where the judgment result is yes, continue to judge whether the adjacent cell of this cell and this cell meets that predetermined load balancing performs condition；In the case where continuing judged result to be, it will meet that the UE of predetermined candidate conditional is balanced to the Target cell in adjacent cell in all user equipment (UE)s under this cell.By means of the invention it is possible to reach the reliability for improving load balancing, ageing, constringent effect.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of load equalization method and device.
Background technology
LTE（Long-Term Evolution, Long Term Evolution）The resource of cell is limited in communication system, with
The increase of amount and business number, the load of cell can gradually increase, and the increase of cell load can influence customer service
Index performance, if the load of cell can not be reduced timely and effectively, when the load of system increases to the warning line of system, just
The performance of system can be caused drastically to be deteriorated or even cause system crash；Simultaneously as power load distributing is uneven, for heavy load cell
For, its resource possessed is relatively deficient easily to cause the service quality of user fully to ensure, for underload cell
For, the wasting of resources but be present.Thus, load balancing technology is introduced.The effect of load balancing is exactly by real-time
Monitor the load of current area and obtain adjacent area cell load, and then individual cells load mistake is prevented using load sharing mechanism
It is high.The minizone that taking load equalization method can make load associated on geographical position is evenly distributed as far as possible, is reduced
Concentrations in some cell of load in region, so as to effectively improve systematic entirety energy, improve system security,
Stability and capacity so that system reaches the state of a total optimization.
In load equalization method, if load balancing function enables, periodicity X2 interface measurement, eNodeB are carried out
（Base station）Start load cycling equilibrium timer.When load balancing timer expiry, load condition is judged, and from small
Candidate UE is selected in area（User Equipment, user equipment）Pressure is balanced to Target cell.
But there is following problem in current load balancing：1st, unnecessary X2 measurements, add X2 interface and bear
Load, when this cell load is lighter, it is not necessary to perform load balancing；2nd, balanced UE selections do not optimize, and cause UE being balanced to mesh
The load of this cell can not lower quickly after mark cell, or service quality cannot protect after UE is balanced into Target cell
Card, or UE are in frequently table tennis equilibrium；3rd, it is balanced using forcing, do not account for the covering feelings of Target cell and this cell
Condition, in fact it could happen that Target cell signal is very weak, or without Target cell signal covering etc., balanced poor reliability.
The content of the invention
The invention provides a kind of load equalization method and device, one of at least to solve the above problems.
According to an aspect of the invention, there is provided a kind of load equalization method, including：This cell is obtained predetermined equal
The average load to weigh in the cycle；Judge the difference whether average load is more than between load balancing thresholding and load balancing amount of hysteresis
Value, in the case where the judgment result is yes, continues to judge whether this cell and the adjacent cell of this cell meet that predetermined load is equal
Weigh execution condition；In the case where continuing judged result to be, will meet in all user equipment (UE)s under this cell predetermined
The UE of candidate conditional is balanced to the Target cell in adjacent cell.
Preferably, average load of this cell within the predetermined balanced cycle is obtained, including：It is small to this according to the sampling period
The resource service condition in area is sampled；Multiple information on loads are received within the balanced cycle, wherein, each information on load is each
The sampled result that the sampling period interior resource service condition to this cell obtains after sampling；Multiple information on loads are put down
Calculate, obtain average load.
Preferably, continue to judge whether the adjacent cell of this cell and this cell meets that predetermined load balancing performs condition,
Including：The interactive information that this cell interacts with adjacent cell progress load is obtained, wherein, exchanging information includes the negative of adjacent cell
Lotus；Continued to judge whether this cell and adjacent cell meet that load balancing performs condition according to interactive information.
Preferably, it will meet that the UE of predetermined candidate conditional is balanced to adjacent cell in all user equipment (UE)s under this cell
In Target cell in, including：The load balancing got measurement configuration parameter is sent to the UE for meeting candidate conditional；Receive
Being measured according to load balancing after configuration parameter carries out load balancing measurement to adjacent cell of meeting that the UE of candidate conditional reports obtains
Load balancing measurement report, wherein, in load balancing measurement report carry adjacent cell measurement result information；Waited according to satisfaction
The measurement result information of the UE of condition load, the load of adjacent cell and adjacent cell is selected to determine Target cell from adjacent cell,
And the UE for meeting candidate conditional is balanced to Target cell.
Preferably, load balancing performs condition and included：The load of adjacent cell is less than the load of this cell, and this cell is negative
Lotus exceedes predetermined load balancing and performs thresholding.
Preferably, candidate conditional includes：There is no emergence call service, be not in load balancing incision guard mode, and branch
Hold different-frequency measure and alien frequencies switching.
Preferably, the UE for meeting predetermined candidate conditional in all user equipment (UE)s under this cell is balanced to it is adjacent small
After Target cell in area, this method also includes：Judge whether average load is less than load balancing thresholding and load balancing is slow
Stagnant amount and value；In the case where average load is less than and is worth, terminate the current load balancing state for carrying out load balancing operation,
Otherwise, maintain to meet equilibrium state.
According to another aspect of the present invention, there is provided a kind of load balancing device, positioned at evolved base station（eNodeB）, bag
Include：Acquisition module, for obtaining average load of this cell within the predetermined balanced cycle；First judge module, for judging
Whether average load is more than the difference between load balancing thresholding and load balancing amount of hysteresis, in the situation that judged result is yes
Under, continue to judge whether the adjacent cell of this cell and this cell meets that predetermined load balancing performs condition；Balance module, it is used for
In the case where the continuation judged result of determination module is to be, predetermined time will be met in all user equipment (UE)s under this cell
The UE of condition is selected to be balanced to Target cell in adjacent cell.
Preferably, acquisition module includes：Sampling unit, for being entered according to the sampling period to the resource service condition of this cell
Row sampling；First receiving unit, for receiving multiple information on loads within the balanced cycle, wherein, each information on load is each
The sampled result that the sampling period interior resource service condition to this cell obtains after sampling；Computing unit, for multiple
Information on load carries out average computation, obtains average load.
Preferably, the first judge module includes：Acquiring unit, carry out what load interacted for obtaining this cell and adjacent cell
Interactive information, wherein, exchanging information includes the load of adjacent cell；Judging unit, for being continued to judge this according to interactive information
Whether cell and adjacent cell meet that load balancing performs condition.
Preferably, balance module includes：Transmitting element, for the load balancing got measurement configuration parameter to be sent to
Meet the UE of candidate conditional；Second receiving unit, meet that what the UE of candidate conditional reported measures according to load balancing for receiving
The load balancing measurement report that configuration parameter to adjacent cell obtain after load balancing measurement, wherein, load balancing measurement report
The measurement result information of adjacent cell is carried in announcement；Balanced unit, for load according to the UE for meeting candidate conditional, adjacent cell
The measurement result information of load and adjacent cell determines Target cell from adjacent cell, and the UE for meeting candidate conditional is balanced to
Target cell.
Preferably, load balancing performs condition and included：The load of adjacent cell is less than the load of this cell, and this cell is negative
Lotus exceedes predetermined load balancing and performs thresholding.
Preferably, candidate conditional includes：There is no emergence call service, be not in load balancing incision guard mode, and branch
Hold different-frequency measure and alien frequencies switching.
Preferably, the device also includes：Second judge module, for judging whether average load is less than load balancing thresholding
With load balancing amount of hysteresis and value；Processing module, for the situation for being less than and being worth in the second judge module judgement average load
Under, terminate the current load balancing state for carrying out load balancing operation, otherwise, maintenance meets equilibrium state.
By the present invention, using load balancing amount of hysteresis is introduced, it is more than load balancing in the average load for judging this cell
When difference between thresholding and load balancing amount of hysteresis, it is determined that the mode of load balancing is carried out to this cell and adjacent cell,
Solve the problems, such as that X2 measurements unnecessary caused by prior art, balanced UE selections do not optimize, pressure must be used balanced, subtract
Small X2 interface load avoids the ping-pong of X2 measurements simultaneously, simultaneously, it is contemplated that UE base priority, ensure that Gao You
The experience of first level user, so as to reach the reliability for improving load balancing, ageing, constringent effect.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is load equalization method flow chart according to embodiments of the present invention；
Fig. 2 is the overall process flow figure of load balancing according to the preferred embodiment of the invention；
Fig. 3 is load equilibrium processing method schematic diagram between base station according to the preferred embodiment of the invention；
Fig. 4 is internal loading equalization processing method schematic diagram in base station according to the preferred embodiment of the invention；
Fig. 5 is that load balancing according to the preferred embodiment of the invention stops process chart；
Fig. 6 is that load balancing X2 measurements according to the preferred embodiment of the invention start processing method schematic diagram；
Fig. 7 is load balancing X2 measurements stop treatment method schematic diagram according to the preferred embodiment of the invention；
Fig. 8 is load balancing cycle timer timeout treatment flow chart according to the preferred embodiment of the invention；
Fig. 9 is load balancing execution flow chart according to the preferred embodiment of the invention；
Figure 10 is the structured flowchart of load balancing device according to embodiments of the present invention；And
Figure 11 is the structured flowchart of load balancing device according to the preferred embodiment of the invention.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
Fig. 1 is load equalization method flow chart according to embodiments of the present invention, as shown in figure 1, this method mainly include with
Lower step（Step S102- steps S106）.
Step S102, obtain average load of this cell within the predetermined balanced cycle.
Step S104, judge the difference whether average load is more than between load balancing thresholding and load balancing amount of hysteresis,
In the case where the judgment result is yes, continue to judge whether this cell and the adjacent cell of this cell meet that predetermined load balancing is held
Row condition.
Step S106, in the case where continuing judged result to be, it will meet in all user equipment (UE)s under this cell
The UE of predetermined candidate conditional is balanced to the Target cell in adjacent cell.
, can when obtaining average load of this cell within the predetermined balanced cycle in the step S102 of the present embodiment
By by realizing in a manner of such：The resource service condition of this cell is sampled according to the sampling period；Within the balanced cycle
Multiple information on loads are received, wherein, each information on load is that the resource service condition of this cell is carried out in each sampling period
The sampled result obtained after sampling；Average computation is carried out to multiple information on loads, obtains average load.
In the step S104 of the present embodiment, when that whether the adjacent cell for continuing to judge this cell and this cell meets is predetermined
When load balancing performs condition, it can be realized by such mode：Obtain the friendship that this cell interacts with adjacent cell progress load
Mutual information；Continued to judge whether this cell and adjacent cell meet that load balancing performs condition according to interactive information.
In the present embodiment, step S106 can be implemented：The load balancing got measurement configuration parameter is sent
To the UE for meeting candidate conditional；Receive and meet that what the UE of candidate conditional reported measures configuration parameter to adjacent cell according to load balancing
The load balancing measurement report obtained after load balancing measurement is carried out, wherein, adjacent cell is carried in load balancing measurement report
Measurement result information；According to the measurement result information of the load for the UE for meeting candidate conditional, the load of adjacent cell and adjacent cell
Target cell is determined from adjacent cell, and the UE for meeting candidate conditional is balanced to Target cell.
In the present embodiment, load balancing performs condition and can included：The load of adjacent cell is less than the load of this cell, and
The load of this cell exceedes predetermined load balancing and performs thresholding.
In the present embodiment, candidate conditional can include：There is no emergence call service, be not in load balancing incision protection
State, and support different-frequency measure and alien frequencies switching.Certainly, in actual applications, candidate conditional can be carried out according to the actual requirements
Corresponding adjustment, does not limit to this.
Preferably, after the step S104 of the present embodiment, it can also judge whether average load is less than load balancing door
Limit with load balancing amount of hysteresis and value；In the case where average load is less than and is worth, terminate current progress load balancing operation
Load balancing state, otherwise, maintenance meet equilibrium state.
For the load equalization method of this example, in actual applications, it can be accomplished by the following way.
（1）The acquisition of parameter, can be from webmaster（For example, OMC）It is middle to obtain the load balancing parameter of configuration, then obtained from webmaster
Take all adjacent areas of this cell.
（2）The measurement of MAC resources is carried out, eNodeB is with sampling period TsampleEach UE money under sampling plot and cell
Source service condition and with cycle TreportReport the average load information after sample mean.
（3）The dynamic start and stop of load balancing, if the load balancing function of cell enables, eNodeB is continuously counted
TLoadB/TsampleThe average value of secondary cell load, then decided whether to start load balancing work(according to the average load situation of cell
Energy.If load balancing function is more than load balancing without the average load of startup and cell starts thresholding
ThresholdLoadStartWith load balancing amount of hysteresis HystLoadDifference, then start load balancing function, that is, start the cycle be
TLoadBLoad balancing cycle timer and load balancing X2 measurement.If the average load of load balancing function on but cell
Start thresholding and load balancing amount of hysteresis Hyst less than load balancingLoadSum, then stop load balancing, that is, stop load balancing
Cycle timer and X2 measurements, it is other, then maintain load balancing state constant.
（4）Load balancing X2 measurements are carried out, eNodeB obtains all adjacent areas of this cell from the neighbor cell configuration module of webmaster,
The load balancing parameter of each adjacent area is obtained from the parameter configuration module of webmaster.To the adjacent cell that load balancing function enables by ownership
If base station be divided into dry measure group and measure.
（5）Load balancing cycle timer timeout treatment, eNodeB judge according to the load of this cell and all adjacent cells
Whether meet that load balancing performs condition.If it is satisfied, then a number of candidate for meeting certain condition is selected according to criterion
UE issue load balancing measurement configuration, and delete a load balancing cycle issued load balancing measurement configuration but it is not upper
Report load balancing measurement report UE load balancing measurement configuration.If be unsatisfactory for, delete under a load balancing cycle
Send out load balancing measurement configuration but do not report load balancing measurement report UE load balancing to measure configuration.
（6）Load balancing performs, after eNodeB receives the load balancing measurement report that UE is reported, according to the load of the UE
The load of adjacent cell with being carried in the corresponding load equilibrium measurement report that is mutually obtained by X2 oral sexes, is judged by certain criterion
Whether UE is balanced to the Target cell.It is balanced to Target cell if meeting condition.
Above-mentioned load equalization method is described in detail below in conjunction with Fig. 2 to Fig. 9 and preferred embodiment.
Fig. 2 is the overall process flow figure of load balancing according to the preferred embodiment of the invention, as shown in Fig. 2 the flow
Mainly include the following steps that（Step S202- steps S210）.
Step S202, cell is in normal condition, and eNodeB continuously counts TLoadB/TsampleIn secondary MAC resource measurements module
The average value of the cell load of report, if cell load equalization function is enabled but load balancing does not start, and cell is averaged
Load is more than the difference that load balancing starts thresholding and load balancing amount of hysteresis, then goes to step S204；Otherwise, return.
Step S204, start load balancing cycle timer, go to step S206.
Step S206, tissue and initiate load balancing X2 measurement, go to step S208.
Step S208, handle load balancing cycle timer time-out, first, according to the load of this cell and adjacent cell according to
Criterion judges whether to meet that load balancing performs condition；Secondly, if meeting that load balancing performs condition, selected according to criterion
Candidate's equilibrium UE simultaneously issues load balancing measurement configuration, goes to step S210.
Step S210, load balancing performs processing, and the load balancing measurement report selection target that eNodeB reports from UE is small
Area；Then judging whether according to criterion can be balanced to Target cell, if it is then UE is balanced small to target by switching
Area.
Fig. 3 is load equilibrium processing method schematic diagram between base station according to the preferred embodiment of the invention, as shown in figure 3, should
Method comprises the following steps（Step S302- steps S312）.
Step S302, when load balancing cycle timer time-out, time exceeded message is handled, processing is as follows：First according to this
Cell and judge whether to meet that load balancing performs condition by the information on load of the mutual adjacent cell of X2 oral sexes；Secondly, it is if full
Sufficient load balancing performs condition, then by looking for certain criterion to select candidate's equilibrium UE lists, selects load balancing to be deleted to measure
The UE lists of configuration, go to step S304.
Step S304, load balancing measurement configuration is issued to candidate's equilibrium UE by RRC connection reallocation messages；Pass through RRC
Connect reallocation message and measure deletion load balancing measurement configuration under the UE configured to load balancing to be deleted, go to rapid S306.
Step S306, eNodeB receives UE RRC connections and matches somebody with somebody completion message again, and RRC connections are gone to rapid again with completing
S308。
Step S308, eNodeB waits UE to report measurement report (MR, Measurement based on load balancing
Report).When eNodeB receives the measurement report based on load balancing that UE reports, rapid S310 is gone to.
Step S310, eNodeB performs load balancing judgement, judges whether UE meets the balanced condition to Target cell, such as
Fruit meets, then goes to step S312；Otherwise, step S308 is gone to.
Step S312, eNodeB performs the X2 switchings based on load balancing.
Fig. 4 is internal loading equalization processing method schematic diagram in base station according to the preferred embodiment of the invention, as shown in figure 4, should
Method comprises the following steps（Step S402- steps S412）.
Step S402, when load balancing cycle timer time-out, time exceeded message is handled.Processing is as follows：First according to this
The information on load of cell and adjacent cell judges whether to meet that load balancing performs condition；Secondly, if meeting that load balancing performs
Condition, then by looking for certain criterion to select candidate's equilibrium UE lists, the UE lists of load balancing measurement configuration to be deleted are selected, are turned
To step S404.
Step S404, load balancing measurement configuration is issued to candidate's equilibrium UE by RRC connection reallocation messages；Pass through RRC
Connect reallocation message and measure deletion load balancing measurement configuration under the UE configured to load balancing to be deleted, go to step S406.
Step S406, eNodeB receives UE RRC connections and matches somebody with somebody completion message again, and RRC connections go to step again with completing
S408。
Step S408, eNodeB waits UE to report measurement report (MR, Measurement based on load balancing
Report).When eNodeB receives the measurement report based on load balancing that UE reports, step S410 is gone to.
Step S410, eNodeB performs load balancing judgement, judges whether UE meets the balanced condition to Target cell, such as
Fruit meets, then goes to step S412；Otherwise, step S408 is gone to.
Step S412, eNodeB performs switches in the base station based on load balancing.
Fig. 5 is that load balancing according to the preferred embodiment of the invention stops process chart, as shown in figure 5, the flow bag
Include following steps（Step S502- steps S506）.
Step S502, cell is in normal condition, and eNodeB continuously counts TLoadB/TsampleIn secondary MAC resource measurements module
The average value of the cell load of report.If cell load equalization function is enabled and load balancing starts, but the average load of cell
Start thresholding and load balancing amount of hysteresis sum less than load balancing, then go to step S504；Otherwise, return.
Step S504, stop load balancing cycle timer, go to step S506.
Step S506, all load balancing X2 measurements of this cell are stopped.
Fig. 6 is that load balancing X2 measurements according to the preferred embodiment of the invention start processing method schematic diagram, such as Fig. 6 institutes
Show, this method comprises the following steps（Step S602- steps S608）.
Step S602, X2 measurement demands are organized, source eNodeB public-measurement module is according to all of this cell of acquisition
The load balancing configuration parameter of adjacent cell and adjacent cell, the adjacent cell that load balancing function enables is divided by the base station of ownership
If being dry measure group, step S604 is gone to.
Step S604, source eNodeB public-measurement module according to the measurement demand of tissue respectively to the correspondence that X2 mouths be present
Target eNodeB sends the measurement that request type is start and asked, and goes to step S606.
Step S606, after target eNodeB public-measurements module receives measurement request, the measurement ID of target side is distributed, and lead to
Cross measurement response message and bring the measurement ID of target side to source.The resource status carried asked according to measurement simultaneously in updates week
Phase starts timer, goes to step S608.
Step S608, when the resource status update cycle then, target eNodeB public-measurements modular organisation measurement request in
The resource state information of each measurement cell carried, and bring source by resource status new information.Start simultaneously next
The resource status update cycle.
Fig. 7 is load balancing X2 measurements stop treatment method schematic diagram according to the preferred embodiment of the invention, such as Fig. 7 institutes
Show, this method comprises the following steps（Step S702- steps S706）.
Step S702, all X2 measurements groups existing for this cell of source eNodeB public-measurement module walks, to corresponding
Target eNodeB sends the measurement that request type is stop and asked, and goes to step S704.
Step S704, target eNodeB public-measurement module is received to kill resource status after stopping measurement being asked and update and determined
When device, recovery measurement ID resources, and to source eNodeB send measurement response message, go to step S706.
Step S706, after source eNodeB public-measurement module receives the measurement response message from target eNodeB, clearly
Except corresponding measurement demand, and the measurement ID resources for source of returning.
Fig. 8 is load balancing cycle timer timeout treatment flow chart according to the preferred embodiment of the invention, such as Fig. 7 institutes
Show, the flow comprises the following steps（Step S802- steps S808）.
Step S802, the uplink and downlink load equalizing coefficient of this cell and all adjacent cells is calculated, goes to step S804；
Step S804, judge whether this cell meets that load balancing performs condition.If up-downgoing meets that load is equal simultaneously
Weighing apparatus performs thresholding, then priority treatment is descending, and reprocessing is up.Judgment condition is：A, whether this cell is this cell and all neighbours
Load is most heavy in cell；B, whether the load of this cell reaches the load balancing execution thresholding of this cell.If above-mentioned condition
As long as one is unsatisfactory for, then step S808 is gone to；Otherwise, step S806 is gone to；
Step S806, candidate equilibrium UE is selected, processing procedure is：（1）UE is entered from small to large by average base priority
Row sequence obtains a queue；（2）UE is ranked up to obtain another queue from big to small by the number of resources of actual use；
（3）Orders of the same UE in different queue is obtained, and is weighted to obtain the last of UE by the weight of place queue
Priority；（4）UE is ranked up from small to large according to priority；（5）Certain amount is selected successively since first UE（Net
Pipe is configurable）The UE for meeting condition be put into candidate's equilibrium UE lists；Condition is：A, without emergence call service；B, it is not at
Guard mode is cut in load balancing；In order to avoid table tennis load balancing phenomenon occurs for the UE of load balancing incision, one is introduced
Duration is protected, this protection duration background net management can configure.That is the UE of load balancing incision only exceedes this protection duration
Load balancing candidate UE etc. may be chosen as again, go to step S808；
Step S808, the UE lists of load balancing measurement configuration to be deleted were obtained, a upper load balancing cycle is selected
For candidate UE but do not receive load balancing measurement report UE be put into delete load balancing measurement configuration UE lists, return.
Fig. 9 is load balancing execution flow chart according to the preferred embodiment of the invention, as shown in figure 9, the flow include with
Lower step（Step S902- steps S912）.
Step S902, adjacent cell list filters in the load balancing measurement report reported to UE；Then to remaining
Cell is according to priority carried out from big to small, goes to step S904.
Step S904, a Target cell is selected, goes to step S906.
Step S906, the direction of the affiliated load balancings of the UE is obtained, i.e. the UE is because upstream or downstream meet load balancing
Condition is selected as candidate UE, and load caused by pre-estimation UE equilibriums to Target cell correspondence direction, goes to step S908.
Step S908, load summation of the Target cell in correspondence direction is calculated：On correspondence direction the load of Target cell with
Load sum caused by pre-estimation UE equilibriums to the Target cell；Then judge whether correspondence direction Target cell meets condition,
Condition is as follows：A, whether the load summation of Target cell is less than the Target cell counterparty obtained from the parameter configuration module of webmaster
To load balancing perform thresholding；B, whether the load summation of Target cell is less than the load after this cell pre-updated（This cell
Load subtract the UE be balanced to Target cell pre-estimation reduction load）If meeting condition, step S912 is gone to；It is no
Then, step S910 is gone to.
Step S910, the UE equilibriums to Target cell next Target cell is not selected into, if being last
Cell, then return；Otherwise, step S906 is gone to.
Step S912, it is the UE is balanced to Target cell by switching, return.
The load equalization method provided using above-described embodiment, by way of introducing load balancing amount of hysteresis, is being judged
When the average load of this cell is more than the difference between load balancing thresholding and load balancing amount of hysteresis, it is determined that to this cell
Load balancing is carried out with adjacent cell, X2 interface load is reduced while avoids X2 measurement ping-pongs, simultaneously, it is contemplated that UE's
Base priority, the experience of high-priority users is ensure that, so as to reach the reliability for improving load balancing, ageing, convergence
The effect of property.
Figure 10 is the structured flowchart of load balancing device according to embodiments of the present invention, and the device is realizing above-mentioned implementation
The load balancing that example provides, the device are located at evolved base station（eNodeB）, as shown in Figure 10, the device mainly includes：Obtain
Module 10, the first judge module 20 and balance module 30.Wherein, acquisition module 10, for obtaining this cell predetermined equal
The average load to weigh in the cycle；First judge module 20, is connected to acquisition module 10, for judging it is negative whether average load is more than
Difference between lotus equilibrium thresholding and load balancing amount of hysteresis, in the case where the judgment result is yes, continue to judge this cell and
Whether the adjacent cell of this cell meets that predetermined load balancing performs condition；Balance module 30, the first judge module 20 is connected to,
In the case of being in the continuation judged result of determination module, it will meet in all user equipment (UE)s under this cell predetermined
The UE of candidate conditional be balanced to Target cell in adjacent cell.
Figure 11 is the structured flowchart of load balancing device according to the preferred embodiment of the invention, as shown in figure 11, excellent at this
Select in the load balancing device that embodiment provides, acquisition module 10 can include：Sampling unit 12, for according to the sampling period pair
The resource service condition of this cell is sampled；First receiving unit 14, is connected to sampling unit 12, within the balanced cycle
Multiple information on loads are received, wherein, each information on load is that the resource service condition of this cell is carried out in each sampling period
The sampled result obtained after sampling；Computing unit 16, the first receiving unit 14 is connected to, for being put down to multiple information on loads
Calculate, obtain average load.
In the load balancing device that the preferred embodiment provides, the first judge module 20 can include：Acquiring unit 22,
The interactive information for carrying out load for obtaining this cell and adjacent cell and interacting；Judging unit 24, acquiring unit 22 is connected to, is used for
Continued to judge whether this cell and adjacent cell meet that load balancing performs condition according to interactive information.
In the load balancing device that the preferred embodiment provides, balance module 30 can include：Transmitting element 32, is used for
The load balancing got measurement configuration parameter is sent to the UE for meeting candidate conditional；Second receiving unit 34, is connected to hair
Send unit 32, for receive meet that the UE of candidate conditional reports configuration parameter is measured according to load balancing adjacent cell is born
The load balancing measurement report obtained after the balanced measurement of lotus, wherein, the measurement knot of carrying adjacent cell in load balancing measurement report
Fruit information；Balanced unit 36, the second receiving unit 34 is connected to, for the load according to the UE for meeting candidate conditional, adjacent cell
Load and the measurement result information of adjacent cell determine Target cell from adjacent cell, and will meet that the UE of candidate conditional is balanced
To Target cell.
In a preferred embodiment, load balancing performs condition and can included：The load of adjacent cell is less than the load of this cell,
Exceed predetermined load balancing with the load of this cell and perform thresholding.
In a preferred embodiment, candidate conditional can include：There is no emergence call service, be not in load balancing incision and protect
Shield state, and support different-frequency measure and alien frequencies switching.
Preferably, the load balancing device that the preferred embodiment provides can also include：Second judge module 40, is connected to
Balance module 30 is used to judging whether average load is less than load balancing thresholding and load balancing amount of hysteresis and value；Processing module
50, the second judge module 40 is connected to, in the case where the second judge module judges that average load is less than and is worth, terminating to work as
The preceding load balancing state for carrying out load balancing operation, otherwise, maintenance meets equilibrium state.
The load balancing device provided using above-described embodiment, by way of introducing load balancing amount of hysteresis, is being judged
When the average load of this cell is more than the difference between load balancing thresholding and load balancing amount of hysteresis, it is determined that to this cell
Load balancing is carried out with adjacent cell, X2 interface load is reduced while avoids X2 measurement ping-pongs, simultaneously, it is contemplated that UE's
Base priority, the experience of high-priority users is ensure that, so as to reach the reliability for improving load balancing, ageing, convergence
The effect of property.
As can be seen from the above description, the present invention realizes following technique effect：According to the load condition of this cell
Dynamically start and stop X2 measurements, and introduce an amount of hysteresis, reduce X2 interface load while avoid X2 measurement table tennises
Effect；When selecting balanced UE, it is contemplated that UE dispatch situation, improve the ageing of load balancing；Consider UE's simultaneously
Base priority, it ensure that the experience of high-priority users；Guard time is introduced, avoids table tennis equalizing effect；Using based on
The load balancing of strategy, the reliability of equilibrium is improved, meanwhile, when load balancing performs, first it is small to be balanced to target by anticipation UE
Whether can be overloaded behind area, if overload, is not balanced to Target cell by UE, improves convergence.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored
Performed in the storage device by computing device, and in some cases, can be with different from shown in order execution herein
The step of going out or describing, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (14)
- A kind of 1. load equalization method, it is characterised in that including：Obtain average load of this cell within the predetermined balanced cycle；The difference whether average load is more than between load balancing thresholding and load balancing amount of hysteresis is judged, in judged result In the case of being, continue to judge whether the adjacent cell of described cell and described cell meets that predetermined load balancing performs Condition；In the case where continuing judged result to be, predetermined candidate will be met in all user equipment (UE)s under described cell The UE of condition is balanced to the Target cell in the adjacent cell.
- 2. according to the method for claim 1, it is characterised in that it is average negative within the predetermined balanced cycle to obtain this cell Lotus, including：The resource service condition of described cell is sampled according to the sampling period；Multiple information on loads are received within the balanced cycle, wherein, each information on load is each sampling period The sampled result that the interior resource service condition to described cell obtains after sampling；Average computation is carried out to multiple information on loads, obtains the average load.
- 3. according to the method for claim 1, it is characterised in that continue to judge the adjacent small of described cell and described cell Whether area meets that predetermined load balancing performs condition, including：The interactive information that described cell interacts with adjacent cell progress load is obtained, wherein, the interactive information includes The load of the adjacent cell；Continued to judge whether described cell and the adjacent cell meet that the load balancing performs bar according to the interactive information Part.
- 4. according to the method for claim 3, it is characterised in that will meet in all user equipment (UE)s under described cell The UE of predetermined candidate conditional is balanced in the Target cell in the adjacent cell, including：The load balancing got measurement configuration parameter is sent to the UE for meeting the candidate conditional；Receive that the UE for meeting the candidate conditional reports to measure configuration parameter according to the load balancing small to the neighbour Area carries out the load balancing measurement report obtained after load balancing measurement, wherein, carry institute in the load balancing measurement report State the measurement result information of adjacent cell；According to the measurement knot of the load of the UE for meeting the candidate conditional, the load of the adjacent cell and the adjacent cell Fruit information determines the Target cell from the adjacent cell, and the UE for meeting the candidate conditional is balanced into the mesh Mark cell.
- 5. method according to any one of claim 1 to 4, it is characterised in that the load balancing, which performs condition, to be included：The load of the adjacent cell is less than the load of described cell, and the load of described cell exceedes predetermined load balancing Perform thresholding.
- 6. according to the method for claim 5, it is characterised in that the candidate conditional includes：There is no emergence call service, not Guard mode is cut in load balancing, and supports different-frequency measure and alien frequencies switching.
- 7. according to the method for claim 6, it is characterised in that will expire in all user equipment (UE)s under described cell The UE of the predetermined candidate conditional of foot is balanced to after the Target cell in the adjacent cell, and methods described also includes：Judge whether the average load is less than the load balancing thresholding and the load balancing amount of hysteresis and value；In the case where the average load is less than described and value, terminate the current load balancing shape for carrying out load balancing operation State, otherwise, maintain the load balancing state.
- A kind of 8. load balancing device, positioned at evolved base station eNodeB, it is characterised in that including：Acquisition module, for obtaining average load of this cell within the predetermined balanced cycle；First judge module, for judging whether the average load is more than between load balancing thresholding and load balancing amount of hysteresis Difference, in the case where the judgment result is yes, continue to judge whether the adjacent cell of described cell and described cell meets Predetermined load balancing performs condition；Balance module, in the case of being in the continuation judged result of first judge module, by under described cell All user equipment (UE)s in meet that the UE of predetermined candidate conditional is balanced to the Target cell in the adjacent cell.
- 9. device according to claim 8, it is characterised in that the acquisition module includes：Sampling unit, for being sampled according to the sampling period to the resource service condition of described cell；First receiving unit, for receiving multiple information on loads within the balanced cycle, wherein, each information on load is The sampled result that each sampling period interior resource service condition to described cell obtains after sampling；Computing unit, for carrying out average computation to multiple information on loads, obtain the average load.
- 10. device according to claim 8, it is characterised in that first judge module includes：Acquiring unit, the interactive information for carrying out load for obtaining described cell and the adjacent cell and interacting, wherein, the friendship Mutual information includes the load of the adjacent cell；Judging unit, for being continued to judge whether described cell and the adjacent cell meet described bear according to the interactive information Lotus equilibrium execution condition.
- 11. device according to claim 10, it is characterised in that the balance module includes：Transmitting element, the UE of the candidate conditional is met for the load balancing got measurement configuration parameter to be sent to；Second receiving unit, matched somebody with somebody for receive that the UE for meeting the candidate conditional reports according to the load balancing measurement The load balancing measurement report that parameter to the adjacent cell obtain after load balancing measurement is put, wherein, the load balancing The measurement result information of the adjacent cell is carried in measurement report；Balanced unit, for the load according to the UE for meeting the candidate conditional, the load of the adjacent cell and described The measurement result information of adjacent cell determines the Target cell from the adjacent cell, and meets the candidate conditional by described UE is balanced to the Target cell.
- 12. the device according to any one of claim 8 to 11, it is characterised in that the load balancing performs condition bag Include：The load of the adjacent cell is less than the load of described cell, and the load of described cell exceedes predetermined load balancing Perform thresholding.
- 13. device according to claim 12, it is characterised in that the candidate conditional includes：There is no emergence call service, Load balancing incision guard mode is not in, and supports different-frequency measure and alien frequencies switching.
- 14. device according to claim 13, it is characterised in that described device also includes：Second judge module, for judging whether the average load is less than the load balancing thresholding and the load balancing is slow Stagnant amount and value；Processing module, in the case where second judge module judges that the average load is less than described and value, terminating The current load balancing state for carrying out load balancing operation, otherwise, maintains the load balancing state.
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| CN103874142B (en) * | 2012-12-14 | 2017-09-15 | 上海贝尔股份有限公司 | A kind of method and apparatus for being used to switch user equipment |
| CN103619042B (en) * | 2013-10-21 | 2016-09-07 | 大唐移动通信设备有限公司 | A kind of cell capacity load equalization method and device |
| CN103686857A (en) * | 2013-12-30 | 2014-03-26 | 大唐移动通信设备有限公司 | Load balancing method and base station |
| CN104507120B (en) * | 2014-12-10 | 2018-09-18 | 京信通信系统（中国）有限公司 | A kind of load balancing method between cells and device |
| CN104618962A (en) * | 2015-01-27 | 2015-05-13 | 大唐移动通信设备有限公司 | Inter-cell collaborative balance method and device |
| CN105338571A (en) * | 2015-11-25 | 2016-02-17 | 江苏鑫软图无线技术有限公司 | User selection method for LTE system load balance |
| CN110972190A (en) * | 2018-09-30 | 2020-04-07 | 大唐移动通信设备有限公司 | Load balancing optimization method and device |
| CN113676953A (en) * | 2020-05-15 | 2021-11-19 | 上海诺基亚贝尔股份有限公司 | Method and base station for UE selection for mobile load balancing of RAN network |
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