CN106332180A - Load balancing method and device - Google Patents
Load balancing method and device Download PDFInfo
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- CN106332180A CN106332180A CN201510355901.7A CN201510355901A CN106332180A CN 106332180 A CN106332180 A CN 106332180A CN 201510355901 A CN201510355901 A CN 201510355901A CN 106332180 A CN106332180 A CN 106332180A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
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Abstract
The invention provides a load balancing method and device. The method comprises steps of periodically determining a load state of a directional cell corresponding to a determined base station; and according to the load state, adjusting a broadcast wave beam width corresponding to the directional cell. The invention adjusts the broadcast wave beam width corresponding to the directional cell according to the load state, so that the object of adjusting the cell coverage range is achieved, and the object of achieving cell load balancing is further achieved.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to the method and device of a kind of load balancing.
Background technology
At present, LTE (Long Term Evolution, the Long Term Evolution) network planning and covering scheme are continued to use
2G (Generation Mobile Telecommunication System technology)/3G (G mobile communication) networking plan, LTE system
Base station in system is all orientation three sectors (three communities) structure, i.e. cloverleaf structure, and structure is as shown in Figure 1.
Communication user and the distribution of customer service, quantity are all random, time-varying, along with LTE network portfolio
Be continuously increased, it would appear that the unbalanced problem of inter-cell load, heat i.e. in existing network, may be there is in existing network
Point community, the service request of this Hot Spot and access customer number be significantly larger than an average level, and with this
Load in the community that Hot Spot is adjacent may be little, and this will result in, and inter-cell load is unbalanced asks
Topic.
Summary of the invention
The present invention provides the method and device of a kind of load balancing, and in order to solve, intercell load is unbalanced asks
Topic.
A kind of method of load balancing, including:
For each directional cell that the base station determined is corresponding, periodically determine the load shape of described directional cell
State；
According to described load condition, adjust the broadcast beam width that described directional cell is corresponding.
In described method, described load condition includes light condition and overload condition, then according to described load shape
State, adjusts the broadcast beam width that described directional cell is corresponding, specifically includes:
Determine when the load condition of described directional cell is light condition, reduce corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after reduction is not less than presetting broadcast beam width minimum；
Determine when the load condition of described directional cell is overload condition, increase corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after increase is not more than presets broadcast beam width maximum.
The embodiment of the present invention, by increasing or reduce the broadcast beam width of community, reaches to adjust cell load
Purpose.
In described method, described load condition includes light condition and overload condition, then periodically determine described
The load condition of directional cell, specifically includes:
It is periodically detected the Physical Resource Block PRB utilization rate of described directional cell；
Determine that described PRB utilization rate, less than when setting first threshold, determines the load shape of described directional cell
State is light condition；
Determine that described PRB utilization rate, more than in time setting Second Threshold, determines the load of described directional cell
State is overload condition；Or,
It is periodically detected the access customer number of described directional cell；
Determine that described access customer number, less than when setting three threshold values, determines the load condition of described directional cell
For light condition；
Determine that described access customer number, more than when setting four threshold values, determines the load condition of described directional cell
For overload condition；Or,
It is periodically detected PRB utilization rate and the access customer number of described directional cell；
Determine described PRB utilization rate less than setting the 5th threshold value, and described access customer number is less than setting the
During six threshold values, determine that the load condition of described directional cell is light condition；
Determine described PRB utilization rate more than setting the 7th threshold value, and described access customer number is more than setting the
During eight threshold values, determine that the load condition of described directional cell is overload condition.
The embodiment of the present invention passes through community PRB utilization rate, access customer number, determines the load of this community,
So that it is determined that the load condition of this community.
In described method, described base station is orientation six cell structures.
Orient six cell structures compare orientation three cell structures can increase coverage.
In described method, described orientation six cell structure determines in the following way:
On the basis of orientation three cell structures, each directional cell splitting son in a pair in three communities will be oriented
Community, wherein, the coverage of the directional cell that each sub cell is corresponding with this sub cell is identical；
By the azimuth offset control angle the most round about of every pair of sub cell after splitting, and by every pair
Beam angle corresponding to sub cell is set to preset initial value；
Each sub cell is carried out wave beam forming, obtains described orientation six cell structure.
Existing orientation three cell structure is promoted to orient six cell structures, due to community by the embodiment of the present invention
The increase of number, significantly improves coverage.
In described method, by the offset control angle the most round about, azimuth of every pair of sub cell after splitting
Degree, and beam angle corresponding for the every pair of sub cell is set to preset initial value, specifically include:
The amplitude every piece antenna on corresponding by adjusting each sub cell and phase place, by the every antithetical phrase after splitting
The azimuth of community offset control angle the most round about, and by beam angle corresponding for every pair of sub cell
It is set to preset initial value.
The embodiment of the present invention, by adjusting amplitude and the phase place of every antenna, obtains orienting the broadcast of sub cell
Beam angle and beam direction.
Present invention also offers a kind of load balancing apparatus, including:
First determines unit, for each directional cell corresponding for the base station determined, periodically determines institute
State the load condition of directional cell；
Adjustment unit, for according to described load condition, adjusts the broadcast wave beamwidth that described directional cell is corresponding
Degree.
In described device, described adjustment unit specifically for:
Determine when the load condition of described directional cell is light condition, reduce corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after reduction is not less than presetting broadcast beam width minimum；
Determine when the load condition of described directional cell is overload condition, increase corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after increase is not more than presets broadcast beam width maximum.
Described device, described determine unit specifically for:
When described load condition includes light condition and overload condition, it is periodically detected described directional cell
Physical Resource Block PRB utilization rate；
Determine that described PRB utilization rate, less than when setting first threshold, determines the load shape of described directional cell
State is light condition；
Determine that described PRB utilization rate, more than in time setting Second Threshold, determines the load of described directional cell
State is overload condition；Or,
Determine when the load condition of described directional cell is light condition, be periodically detected described directional cell
Access customer number；
Determine that described access customer number, less than when setting three threshold values, determines the load condition of described directional cell
For light condition；
Determine that described access customer number, more than when setting four threshold values, determines the load condition of described directional cell
For overload condition；Or,
Determine when the load condition of described directional cell is light condition, be periodically detected described directional cell
PRB utilization rate and access customer number；
Determine described PRB utilization rate less than setting the 5th threshold value, and described access customer number is less than setting the
During six threshold values, determine that the load condition of described directional cell is light condition；
Determine described PRB utilization rate more than setting the 7th threshold value, and described access customer number is more than setting the
During eight threshold values, determine that the load condition of described directional cell is overload condition.
In described device, described base station is orientation six cell structures.
Described device, also includes:
Second determines unit, and on the basis of orientation three cell structures, it is each fixed to orient in three communities
Sub cell in a pair, wherein, covering of the directional cell that each sub cell is corresponding with this sub cell is cleaved to community
Lid scope is identical；
By the azimuth offset control angle the most round about of every pair of sub cell after splitting, and by every pair
Beam angle corresponding to sub cell is set to preset initial value；
Each sub cell is carried out wave beam forming, obtains described orientation six cell structure.
In described device, described second determine unit will splitting after every pair of sub cell azimuth respectively to
Rightabout offset control angle, and beam angle corresponding for the every pair of sub cell is set to preset initial value
Time, specifically for:
The amplitude every piece antenna on corresponding by adjusting each sub cell and phase place, by the every antithetical phrase after splitting
The azimuth of community offset control angle the most round about, and by beam angle corresponding for every pair of sub cell
It is set to preset initial value.
Utilize the method and device of the load balancing that the present invention provides, have the advantages that according to community
Load condition, adjust broadcast beam width corresponding to community, reach to adjust the purpose of cell coverage area,
And then reach the purpose of cell load equilibrium.Cell coverage area expand, then can absorb adjacent cell business and
User increases the load of this community, and cell coverage area reduces, then the user of this cell edge part and business
Can automatically be transferred to adjacent cell, thus reduce the load of this community.
Accompanying drawing explanation
The orientation three cell structure schematic diagram that Fig. 1 provides for prior art；
The method flow diagram of the load balancing that Fig. 2 provides for the embodiment of the present invention；
Method one flow chart of the load condition of the determination directional cell that Fig. 3 provides for the embodiment of the present invention；
Method two flow chart of the load condition of the determination directional cell that Fig. 4 provides for the embodiment of the present invention；
Method three flow chart of the load condition of the determination directional cell that Fig. 5 provides for the embodiment of the present invention；
Fig. 6 orients six cell structure mode flow charts for the determination that the embodiment of the present invention provides；
Fig. 7 is the orientation three cell networking schematic diagram of prior art；
The orientation six cell networking schematic diagram that Fig. 8 provides for the embodiment of the present invention；
The eight bay model schematic that Fig. 9 provides for the embodiment of the present invention；
Figure 10 (a) for the embodiment of the present invention provide according to the angle of eccentricity in table 1 be-30 spend time corresponding
The antenna beam simulation result that antenna parameter is carried out；
Figure 10 (b) for the embodiment of the present invention provide be 30 degree according to the angle of eccentricity in table 1 time corresponding
The antenna beam simulation result that antenna parameter is carried out；
What Figure 11 (a) provided for the embodiment of the present invention is the skies that-30 degree are corresponding according to the angle of eccentricity in table 2
The antenna beam simulation result that line parameter is carried out；
What Figure 11 (b) provided for the embodiment of the present invention is 30 degree of corresponding skies according to the angle of eccentricity in table 2
The antenna beam simulation result that line parameter is carried out；
The antenna beam simulation result carried out according to table 3 that Figure 12 provides for the embodiment of the present invention；
Figure 13 carries out antenna beam simulation result for what the embodiment of the present invention provided to existing orientation three community；
The device schematic diagram of the load balancing that Figure 14 provides for the embodiment of the present invention.
Detailed description of the invention
With embodiment, the method and device of the load balancing that the present invention provides is carried out more detailed below in conjunction with the accompanying drawings
Carefully illustrate.
The embodiment of the present invention provides a kind of method of load balancing, as in figure 2 it is shown, include:
Step 201, for each directional cell that the base station determined is corresponding, periodically determines that described orientation is little
The load condition in district.
Concrete, base station can corresponding three directional cells (sector), it is also possible to corresponding six orientations
Community (sector), this does not limits.Preferably, this base station is orientation six cell structures, i.e. a base
Six directional cells of correspondence of standing, orient six cell structures and can increase coverage.
For each directional cell that base station is corresponding, periodically determine the load condition of this community, it is preferable that
Load condition includes light condition and overload condition, also includes normal condition, further, it is determined that orient little
When being supported in the first load interval of district, determines that this directional cell is in light condition；Determine directional cell
When being supported in the second load interval, determine that this directional cell is in normal condition；Determine directional cell
Be supported on the 3rd load interval in time, determine that this directional cell is in overload condition.
A kind of preferred implementation of the above-mentioned restriction to load condition, it is possible in the following manner to load
State is defined, and such as load condition includes multiple load interval, and different loads is interval corresponding different
Load condition, such as, load interval be (0,100], (100,150], (150,200], (200,250],
Now, different loads the different load condition of interval just correspondence, and different load conditions is corresponding different
Broadcast beam width value.
Step 202, according to described load condition, adjusts the broadcast beam width that described directional cell is corresponding.
Concrete, the corresponding broadcast beam width of each directional cell, by adjusting broadcast beam width
The adjustment to directional cell coverage can be realized, i.e. increase broadcast beam width, directional cell can be reduced
Coverage, reduce broadcast beam width, the coverage of directional cell can be expanded.
The embodiment of the present invention, can be according to the load condition of community, the broadcast wave beamwidth corresponding by adjusting community
Degree reaches to adjust the purpose of cell coverage area, and cell coverage area expands, then can absorb the business of adjacent cell
With the load that user increases this community, cell coverage area reduces, then the user of this cell edge part and industry
Business can be transferred to adjacent cell automatically, thus reduces the load of this community.
Concrete, by this community absorbing load relatively in the business of adjacent cell and user, this cell edge part
User and business can automatically be transferred to the adjacent cell of light load.
Preferably, described load condition includes light condition and overload condition, then according to described load condition,
Adjust the broadcast beam width that described directional cell is corresponding, specifically include:
Determine when the load condition of described directional cell is light condition, reduce corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after reduction is not less than presetting broadcast beam width minimum；
Determine when the load condition of described directional cell is overload condition, increase corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after increase is not more than presets broadcast beam width maximum.
Concrete, when the load condition of directional cell is light condition, the load of this directional cell is described relatively
Gently, now covering of this directional cell can be increased by the broadcast beam width reducing this directional cell corresponding
Lid scope, thus absorb the load of adjacent cell, it is preferable that adjacent cell relatively big for load and with this MPS process
Partly overlap more adjacent cell.When the load condition of this directional cell is overload condition, this orientation is described
The heavier loads of community, now can reduce this by the broadcast beam width increasing this directional cell corresponding
The coverage of directional cell, thus the load of this directional cell marginal portion is transferred to adjacent cell, preferably
Ground, adjacent cell is that load is less and partly overlap more adjacent cell with this MPS process.Now, it is transferred
The broadcast beam width of the adjacent cell of load can not increase.When the load condition of this community is normal condition,
The broadcast beam width that this directional cell is corresponding is constant.Adjacent cell is the adjacent cell with this Cell statistical station or phase
The adjacent cell of adjacent base station, community adjacent between different base station is interacted by X2 interface.
Concrete, when the base station of this preferred embodiment is for orientation six cell structure, the default ripple of each directional cell
Beam width minima is preferably 36 degree, presets broadcast beam width maximum and is preferably 65 degree, each community
Broadcast beam width also includes an intermediate value, preferably 45 degree.Wherein, the broadcast wave of each directional cell
The preset initial value of beam width is 36 degree.Now, if the currently corresponding broadcast beam width of directional cell
Be 36 degree, then the broadcast beam width increasing community corresponding is: first by Cell Broadcast CB beam angle from 36 degree
Increasing to 45 degree, if after Zeng great ing, this directional cell is also in overload condition, then after setting duration,
The broadcast beam width of this directional cell is increased to 65 degree from 45 degree；If directional cell currently correspondence
Broadcast beam width is 65 degree, then the broadcast beam width reducing directional cell corresponding is: first will orient little
District's broadcast beam width is reduced to 45 degree from 65 degree, if after Jian little ing, directional cell carries shape also in underloading
State, then, after setting duration, be reduced to 36 degree by the broadcast beam width of this directional cell from 45 degree.
Also broadcast beam width that described directional cell corresponding can be decreased or increased in the following manner:
Broadcast beam width that described community corresponding is decreased or increased according to setting step-length.
Concrete, the broadcast beam width that directional cell is corresponding reduces setting step-length, first after being reduced
Broadcast beam width, if now this directional cell is also in light condition, is then setting the time (such as 1
Minute) after, the first broadcast beam width reduces setting step-length again.
Concrete, the broadcast beam width that directional cell is corresponding increases setting step-length, first after being increased
Broadcast beam width, if now this directional cell is also in overload condition, is then setting the time (such as 1
Minute) after, the first broadcast beam width increases setting step-length again.
As a kind of preferred embodiment, described load condition includes light condition and overload condition, then periodically
Determine the load condition of described directional cell, as it is shown on figure 3, specifically include:
Step 301, is periodically detected PRB (Physical Resource Block, the thing of described directional cell
Reason Resource Block) utilization rate.
Step 302, it is judged that whether this PRB utilization rate is less than setting first threshold, if it is, perform step
303, otherwise perform step 304.
Preferably, first threshold is set as 30%.
Step 303, determines that the load condition of described directional cell is light condition.
Step 304, it is judged that whether this PRB utilization rate is more than setting Second Threshold, if it is, perform step
305, otherwise, perform step 306.
Preferably, Second Threshold is set as 70%.
Step 305, determines that the load condition of described directional cell is overload condition.
Step 306, determines that the load condition of described directional cell is normal condition.
Wherein, the execution sequence interchangeable of step 302 and step 304, i.e. first judge whether more than second
Threshold value, then judge whether less than first threshold.
The embodiment of the present invention, by detection community PRB utilization rate, determines the load of this community, so that it is determined that
The load condition of this community.
As another kind of preferred embodiment, described load condition includes light condition and overload condition, then cycle
Property determines the load condition of described directional cell, as shown in Figure 4, specifically includes:
Step 401, is periodically detected the access customer number of described directional cell.
Step 402, it is judged that whether this access customer number is less than setting the 3rd threshold value, if it is, perform step
403, otherwise, perform step 404.
Preferably, the 3rd threshold value is set as 30.
Step 403, determines that the load condition of described directional cell is light condition.
Step 404, it is judged that whether this access customer number is more than setting the 4th threshold value, if it is, perform step
405, otherwise, perform step 406.
Preferably, the 4th threshold value is set as 120.
Step 405, determines that the load condition of described directional cell is overload condition.
Step 406, determines that the load condition of described directional cell is normal condition.
Wherein, the execution sequence interchangeable of step 402 and step 404.
The embodiment of the present invention, by detection community access customer number, determines the load of this community, so that it is determined that should
The load condition of community.
As another kind of preferred embodiment, described load condition includes light condition and overload condition, then cycle
Property determines the load condition of described directional cell, as it is shown in figure 5, specifically include:
Step 501, is periodically detected PRB utilization rate and the access customer number of described directional cell.
Step 502, it is judged that whether PRB utilization rate is less than setting the 5th threshold value, if it is, perform step
503, otherwise perform step 505.
Preferably, the 5th threshold value is set as 20%.
Step 503, it is judged that whether access customer number is less than setting the 6th threshold value, if it is, perform step 504,
Otherwise perform step 508.
Preferably, the 6th threshold value is set as 20.
Step 504, determines that the load condition of described directional cell is light condition.
Step 505, it is judged that whether PRB utilization rate is more than setting the 7th threshold value, if it is, perform step
506, otherwise, perform step 508.
Preferably, the 7th threshold value is set as 60%.
Step 506, it is judged that whether access customer number is more than setting the 8th threshold value, if it is, perform step 507,
Otherwise, step 508 is performed.
Preferably, the 8th threshold value is set as 100.
Step 507, determines that the load condition of described directional cell is overload condition；
Step 508, determines that the load condition of described directional cell is normal condition.
Wherein, set the 5th threshold value less than setting the 7th threshold value, set the 6th threshold value less than setting the 8th threshold value.
The embodiment of the present invention, by combining community PRB utilization rate and access customer number, determines the negative of this community
Carry, so that it is determined that the load condition of this community.
Preferably, orient six cell structures and determine in the following way, as shown in Figure 6, including:
Step 601, on the basis of orientation three cell structures, cleaves into orienting each community in three communities
A pair sub cell, wherein, the coverage of the community that each sub cell is corresponding with this sub cell is identical.
Concrete, on the basis of existing three cell structures, for each orientation in three directional cells
Community, by this directional cell splitting (two) sub cell in a pair, every in a pair sub cell after splitting
Individual sub cell is identical with the coverage of the directional cell before splitting.
Step 602, by the azimuth offset control angle the most round about of every pair of sub cell after splitting,
And beam angle corresponding for the every pair of sub cell is set to preset initial value.
Concrete, by the azimuth offset control angle the most round about of every pair of sub cell after splitting,
Angular positive and negative direction, orientation each offset control angle of every pair of sub cell after will cleaving, it is preferable that set
Angle is 30 degree or 45 degree, and preset initial value is 36 degree.
Step 603, carries out wave beam forming to each sub cell, obtains described orientation six cell structure.
Concrete, eight passage RRU resources are simultaneously allocated to Liang Ge community, the most above-mentioned a pair community,
By wave beam forming, the corresponding eight passage communities of each wave beam a, i.e. community has been divided into two
Community, thus obtain orienting six cell structures.Orient three cell structure networking schematic diagrams as it is shown in fig. 7, its
In, a black round dot represents the base station of orientation three cell structures, as seen from Figure 7, a base station
Corresponding three directional cells.Orient six cell structure networking schematic diagrams as shown in Figure 8, wherein, a black
Round dot represents the base station of orientation six cell structures, as seen from Figure 8, corresponding six orientations in base station
Community.Orient the coverage coverage than orientation three communities of six communities as can be seen from Figures 7 and 8
Bigger.
The embodiment of the present invention, is promoted to orient six cell structures, due to little by existing orientation three cell structure
The increase of district's number, significantly improves coverage.Through to orienting three cell structures and orientation six communities
Structure carries out the drive test analysis of routine, orients covering RSRP (the Reference Signal of six cell structures
Receiving Power, Reference Signal Received Power) value improves 3dB, and cell capacity improves 20%.
Concrete, corresponding eight antennas in sub cell, described eight antennas use dual polarization eight bay
Model, eight bay models are as it is shown in figure 9, wherein, and λ/2 represent the half of wavelength, 1,2,3,4,
5,6,7,8 difference representative antennas P1, P2, P3, P4, P5, P6, P7, P8.Then, step 602
In, by the azimuth offset control angle the most round about of every pair of sub cell after splitting, and by every pair
Beam angle corresponding to sub cell is set to preset initial value, specifically includes:
The amplitude every piece antenna on corresponding by adjusting each sub cell and phase place, by the every antithetical phrase after splitting
The azimuth of community offset control angle the most round about, and by beam angle corresponding for every pair of sub cell
It is set to preset initial value.
The embodiment of the present invention, utilizes the beamforming capabilities of antenna, by adjusting amplitude and the phase place of antenna,
Each sub cell is made to carry out azimuthal biasing according to the amplitude after adjusting and phase place and determine beam angle
Initial value.
Being exemplified below the community oriented in three communities splitting in the embodiment of the present invention is two sub cells
Time the amplitude of antenna corresponding to two sub cells and phase place and wave beam simulation result.At F-band, based on figure
Dual polarization eight bay model shown in 9 and the arbitrary community in orientation three cell structures, obtain wide
Broadcast two sub cells that beam angle is 30 degree, then the angle of eccentricity of this arbitrary community and each poliarizing antenna
Corresponding amplitude and phase place value are as shown in table 1；Broadcast beam width to be obtained is that two sons of 45 degree are little
District, the then angle of eccentricity of this arbitrary community and amplitude corresponding to each poliarizing antenna and phase place value such as table 2 institute
Showing, wherein P1～P8 is respectively antenna number, P1 and P5, P2 and P6, P3 and P7, P4 and P8 divide
Be not a pair angle be the dual polarized antenna of 90 degree.According to the parameter in table 1 in existing orientation three community
Community, zero degree direction, positive north carry out antenna beam emulation after obtain simulation result respectively such as Figure 10 (a) with scheme
Shown in 10 (b), according to the parameter in table 2, the community, zero degree direction, positive north in existing orientation three community is entered
The simulation result obtained after the emulation of row antenna beam is respectively as shown in Figure 11 (a) and Figure 11 (b).
Table 1
Table 2
By the simulation result of 10 (a), Figure 10 (b), Figure 11 (a) and Figure 11 (b) it can be seen that
After the broadcast beam reduced width of community, the radiation direction of this community is the most accurate, serious distortion does not occurs.
Test through Multi simulation running, optimize amplitude and the phase place value of each antenna, obtain one group of power and interference
It is in amplitude and the phase place value of each antenna of optimal balance point, as shown in table 3.According to the parameter in table 3
The emulation knot obtained after community, zero degree direction, positive north in existing orientation three community is carried out antenna beam emulation
Fruit is as shown in figure 12, i.e. can split after amplitude corresponding for each antenna and phase place are adjusted to the value that table 3 records
It is cleaved into the sub cell that two broadcast beam width are 36 degree, by each in positive negative direction respectively for the community after splitting
Bias 30 degree, available comparatively ideal orientation six cell structure.Little to the positive north zero degree oriented in three communities
After district carries out antenna beam emulation, the simulation result of (broadcast beam width is 65 degree) is as shown in figure 13.
Table 3
From Figure 12 and Figure 13, and orient the limit, community of arbitrary 65 degree of broadcast beam width in three communities
The level on boundary's (120 degree with 240 degree) is compared, two the 36 degree of broadcast beams obtained after cleaving this community
The sub cell of width on 120 degree and 240 orientation, level boost 6～8dB.In Figure 12 and Figure 13,
Being increased successively by center of circle direction level outside circle, the level difference being connected between two concentric circulars is 3dB.
Inventive concept as method based on the load balancing provided with above-described embodiment, the embodiment of the present invention
Additionally provide a kind of load balancing apparatus, as shown in figure 14, including:
First determines unit 1401, for each directional cell corresponding for the base station determined, the most really
The load condition of fixed described directional cell；
Adjustment unit 1402, for according to described load condition, adjusts the broadcast wave that described directional cell is corresponding
Beam width.
Preferably, in described device, described adjustment unit specifically for:
Determine when the load condition of described directional cell is light condition, reduce corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after reduction is not less than presetting broadcast beam width minimum；
Determine when the load condition of described directional cell is overload condition, increase corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after increase is not more than presets broadcast beam width maximum.
Preferably, described device, described determine unit specifically for:
When described load condition includes light condition and overload condition, it is periodically detected described directional cell
PRB utilization rate；
Determine that described PRB utilization rate, less than when setting first threshold, determines the load shape of described directional cell
State is light condition；
Determine that described PRB utilization rate, more than in time setting Second Threshold, determines the load of described directional cell
State is overload condition；Or,
Determine when the load condition of described directional cell is light condition, be periodically detected described directional cell
Access customer number；
Determine that described access customer number, less than when setting three threshold values, determines the load condition of described directional cell
For light condition；
Determine that described access customer number, more than when setting four threshold values, determines the load condition of described directional cell
For overload condition；Or,
Determine when the load condition of described directional cell is light condition, be periodically detected described directional cell
PRB utilization rate and access customer number；
Determine described PRB utilization rate less than setting the 5th threshold value, and described access customer number is less than setting the
During six threshold values, determine that the load condition of described directional cell is light condition；
Determine described PRB utilization rate more than setting the 7th threshold value, and described access customer number is more than setting the
During eight threshold values, determine that the load condition of described directional cell is overload condition.
Preferably, in described device, described base station is orientation six cell structures.
Preferably, described device, also include:
Second determines unit 1403, on the basis of orientation three cell structures, will orient in three communities every
Individual directional cell cleaves sub cell in a pair, wherein, the directional cell that each sub cell is corresponding with this sub cell
Coverage identical；
By the azimuth offset control angle the most round about of every pair of sub cell after splitting, and by every pair
Beam angle corresponding to sub cell is set to preset initial value；
Each sub cell is carried out wave beam forming, obtains described orientation six cell structure.
Preferably, in described device, described second determines that unit is in the orientation by every pair of sub cell after splitting
Angle respectively offset control angle the most round about, and be set to preset by beam angle corresponding for the every pair of sub cell
During initial value, specifically for:
The amplitude every piece antenna on corresponding by adjusting each sub cell and phase place, by the every antithetical phrase after splitting
The azimuth of community offset control angle the most round about, and by beam angle corresponding for every pair of sub cell
It is set to preset initial value.
Utilize the method and device of the load balancing that the present invention provides, have the advantages that according to community
Load condition, adjust broadcast beam width corresponding to community, reach to adjust the purpose of cell coverage area,
And then reach the purpose of cell load equilibrium.Cell coverage area expand, then can absorb adjacent cell business and
User increases the load of this community, and cell coverage area reduces, then the user of this cell edge part and business
Can automatically be transferred to adjacent cell, thus reduce the load of this community.
The present invention is with reference to method, equipment (system) and computer program product according to embodiments of the present invention
The flow chart of product and/or block diagram describe.It should be understood that can by computer program instructions flowchart and
/ or block diagram in each flow process and/or flow process in square frame and flow chart and/or block diagram and/
Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embedding
The processor of formula datatron or other programmable data processing device is to produce a machine so that by calculating
The instruction that the processor of machine or other programmable data processing device performs produces for realizing at flow chart one
The device of the function specified in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or the process of other programmable datas can be guided to set
In the standby computer-readable memory worked in a specific way so that be stored in this computer-readable memory
Instruction produce and include the manufacture of command device, this command device realizes in one flow process or multiple of flow chart
The function specified in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes
Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices
Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one
The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. the method for a load balancing, it is characterised in that including:
For each directional cell that the base station determined is corresponding, periodically determine the load shape of described directional cell
State；
According to described load condition, adjust the broadcast beam width that described directional cell is corresponding.
2. the method for claim 1, it is characterised in that described load condition includes light condition
And overload condition, then according to described load condition, adjust the broadcast beam width that described directional cell is corresponding,
Specifically include:
Determine when the load condition of described directional cell is light condition, reduce corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after reduction is not less than presetting broadcast beam width minimum；
Determine when the load condition of described directional cell is overload condition, increase corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after increase is not more than presets broadcast beam width maximum.
3. the method for claim 1, it is characterised in that described load condition includes light condition
And overload condition, then periodically determine the load condition of described directional cell, specifically include:
It is periodically detected the Physical Resource Block PRB utilization rate of described directional cell；
Determine that described PRB utilization rate, less than when setting first threshold, determines the load shape of described directional cell
State is light condition；
Determine that described PRB utilization rate, more than in time setting Second Threshold, determines the load of described directional cell
State is overload condition；Or,
It is periodically detected the access customer number of described directional cell；
Determine that described access customer number, less than when setting three threshold values, determines the load condition of described directional cell
For light condition；
Determine that described access customer number, more than when setting four threshold values, determines the load condition of described directional cell
For overload condition；Or,
It is periodically detected PRB utilization rate and the access customer number of described directional cell；
Determine described PRB utilization rate less than setting the 5th threshold value, and described access customer number is less than setting the
During six threshold values, determine that the load condition of described directional cell is light condition；
Determine described PRB utilization rate more than setting the 7th threshold value, and described access customer number is more than setting the
During eight threshold values, determine that the load condition of described directional cell is overload condition.
4. the method as described in claim 1-3 is arbitrary, it is characterised in that described base station is little for orientation six
Plot structure.
5. method as claimed in claim 4, it is characterised in that described orientation six cell structure uses such as
Under type determines:
On the basis of orientation three cell structures, each directional cell splitting son in a pair in three communities will be oriented
Community, wherein, the coverage of the directional cell that each sub cell is corresponding with this sub cell is identical；
By the azimuth offset control angle the most round about of every pair of sub cell after splitting, and by every pair
Beam angle corresponding to sub cell is set to preset initial value；
Each sub cell is carried out wave beam forming, obtains described orientation six cell structure.
6. method as claimed in claim 5, it is characterised in that by the side of every pair of sub cell after splitting
Parallactic angle respectively offset control angle the most round about, and beam angle corresponding for the every pair of sub cell is set to pre-
If initial value, specifically include:
The amplitude every piece antenna on corresponding by adjusting each sub cell and phase place, by the every antithetical phrase after splitting
The azimuth of community offset control angle the most round about, and by beam angle corresponding for every pair of sub cell
It is set to preset initial value.
7. the device of a load balancing, it is characterised in that including:
First determines unit, for each directional cell corresponding for the base station determined, periodically determines institute
State the load condition of directional cell；
Adjustment unit, for according to described load condition, adjusts the broadcast wave beamwidth that described directional cell is corresponding
Degree.
8. device as claimed in claim 7, it is characterised in that described adjustment unit specifically for:
Determine when the load condition of described directional cell is light condition, reduce corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after reduction is not less than presetting broadcast beam width minimum；
Determine when the load condition of described directional cell is overload condition, increase corresponding wide of described directional cell
Broadcasting beam angle, the broadcast beam width after increase is not more than presets broadcast beam width maximum.
9. device as claimed in claim 7, it is characterised in that described determine unit specifically for:
When described load condition includes light condition and overload condition, it is periodically detected described directional cell
Physical Resource Block PRB utilization rate；
Determine that described PRB utilization rate, less than when setting first threshold, determines the load shape of described directional cell
State is light condition；
Determine that described PRB utilization rate, more than in time setting Second Threshold, determines the load of described directional cell
State is overload condition；Or,
When described load condition includes light condition and overload condition, it is periodically detected described directional cell
Access customer number；
Determine that described access customer number, less than when setting three threshold values, determines the load condition of described directional cell
For light condition；
Determine that described access customer number, more than when setting four threshold values, determines the load condition of described directional cell
For overload condition；Or,
When described load condition includes light condition and overload condition, it is periodically detected described directional cell
PRB utilization rate and access customer number；
Determine described PRB utilization rate less than setting the 5th threshold value, and described access customer number is less than setting the
During six threshold values, determine that the load condition of described directional cell is light condition；
Determine described PRB utilization rate more than setting the 7th threshold value, and described access customer number is more than setting the
During eight threshold values, determine that the load condition of described directional cell is overload condition.
10. the device as described in claim 7-9 is arbitrary, it is characterised in that described base station is little for orientation six
Plot structure.
11. devices as claimed in claim 10, it is characterised in that also include:
Second determines unit, and on the basis of orientation three cell structures, it is each fixed to orient in three communities
Sub cell in a pair, wherein, covering of the directional cell that each sub cell is corresponding with this sub cell is cleaved to community
Lid scope is identical；
By the azimuth offset control angle the most round about of every pair of sub cell after splitting, and by every pair
Beam angle corresponding to sub cell is set to preset initial value；
Each sub cell is carried out wave beam forming, obtains described orientation six cell structure.
12. devices as claimed in claim 11, it is characterised in that described second determines that unit will split
The azimuth of every pair of sub cell after splitting offset control angle the most round about, and by every pair of sub cell pair
When the beam angle answered is set to preset initial value, specifically for:
The amplitude every piece antenna on corresponding by adjusting each sub cell and phase place, by the every antithetical phrase after splitting
The azimuth of community offset control angle the most round about, and by beam angle corresponding for every pair of sub cell
It is set to preset initial value.
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