CN106714236A - Load balancing method and apparatus - Google Patents
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- CN106714236A CN106714236A CN201510454901.2A CN201510454901A CN106714236A CN 106714236 A CN106714236 A CN 106714236A CN 201510454901 A CN201510454901 A CN 201510454901A CN 106714236 A CN106714236 A CN 106714236A
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Abstract
The invention relates to the technical field of communication, especially to a load balancing method and apparatus. With the method and apparatus, an MLB can be applied to an existing network and a conflict between an MLB and an MRO can be avoided. The load balancing method comprises: after a load value is higher than a first set threshold value, a source region determines a target cell carrying out mobility load balance (MLB) with the source cell; negotiation with the target cell is carried out and a cell individual offset (CIO) value for switching from the source cell to the target cell is adjusted to be increased; and when the load value is lower than a second set threshold value, the increased CIO value is adjusted to be decreased.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of load-balancing method and device.
Background technology
With the development and application of Long Term Evolution (Long Term Evolution, LTE) technology, user couple
Also increasingly improved in the requirement of LTE network quality.When the unbalanced phenomenon of load distribution occurs in cell, no
Network capacity can be only reduced, the service quality of user is also affected, therefore need load in time to minizone
Carry out balanced adjustment.
At present, three kinds of technologies for load balancing, respectively load balancing are primarily present in LTE network
(Load Balancing, LB), carrier aggregation (Carrier Aggregation, CA) and mobility are loaded
Balanced (Mobility Load Balance, MLB).Wherein, LB needs to be selected in the overlapping region of minizone
Selecting specific user equipment (User Equipment, UE) carries out cell transfer, and CA needs in the cell
Could be used when there is two or more carrier wave, be overlapped under covering scene in single layer network neighbor cell, due to
LB is limited by UE selections, and CA is limited by number of carrier wave, and the application effect of both technologies is equal
It is not good.And MLB is an important work(of self-organizing network (Self-Organized Network, SON)
Can, it can realize bearing by adjusting cell individual character skew (Cell Individual Offset, CIO) value
Carry balanced, can effectively solve the problems, such as load imbalance under this scene.
Specify in 3GPP agreements, in MLB, minizone carries out parameter information friendship by X2 interface
Mutually, but it is not prescribed by the specific implementation process of MLB.In addition, also there is another technology in SON
- mobile robustness optimization (Mobility Robustness Optimization, MRO), it is cut by adjustment
Parameter CIO is changed to optimize network, it is to avoid or reduce unnecessary cell switching.It can be seen that, MLB and MRO
Be with different performance indications be oriented to, but they need adjustment handoff parameter be identical.When
MLB and MRO carries out self-optimizing operation simultaneously when, identical handoff parameter may round about be entered
Row adjustment, so as to produce conflict.
In a word, it is necessary to a kind of feasible program that MLB is applied to existing network, and avoid MLB and MRO as far as possible
Between conflict.
The content of the invention
The embodiment of the present invention provides a kind of load-balancing method and device, is used to for MLB to be applied to existing network,
And the conflict for avoiding between MLB and MRO as far as possible.
The embodiment of the present invention provides a kind of load-balancing method, including：
Cell-of-origin load value be higher than the first given threshold after, it is determined that with itself moving property load balancing
The Target cell of MLB；
The cell-of-origin is held consultation by with the Target cell, to for being switched to institute from the cell-of-origin
The personalized skew CIO values of cell for stating Target cell are adjusted upward；
The cell-of-origin load value be less than the second given threshold after, to adjusting upward after CIO values returned
Move back adjustment；Wherein, to adjusting upward after CIO values carry out the CIO values after rollback adjustment less than this is upward
CIO values after adjustment, CIO when not adjusting corresponding to CIO values after being adjusted upward more than or equal to this
Value, second given threshold is less than first given threshold.
Alternatively, the cell-of-origin determines to carry out the Target cell of MLB with itself, including：
The cell-of-origin in each candidate's adjacent cell, determine load value less than the 3rd given threshold and with institute
State at least one candidate's adjacent cell of the user equipment (UE) covered in the presence of overlap between cell-of-origin；Described 3rd
Given threshold is less than first given threshold；
The cell-of-origin it is determined that at least one candidate adjacent cell in, the selection minimum candidate of load value
Adjacent cell is used as the Target cell.
Alternatively, the cell-of-origin determines each candidate's adjacent cell according to following steps：
For each adjacent cell, it is determined that in preset duration, the default bar of satisfaction that the cell-of-origin receives
The ratio of the measurement report quantity of part and the total measurement report quantity for receiving；Wherein, it is described to meet default
The measurement report of condition refers to the Reference Signal Received Quality RSRP values of the adjacent cell in the measurement report
And higher than setting RSRP values, setting RSRP values are negative to the difference between the RSRP values of the cell-of-origin
Value；
If it is determined that ratio higher than setting ratio, it is determined that the adjacent cell be candidate's adjacent cell.
Alternatively, the cell-of-origin is held consultation by with the Target cell, to for from the cell-of-origin
The CIO values for being switched to the Target cell are adjusted upward, including：
The cell-of-origin is held consultation by with the Target cell, according to setting step-length gradually increase for from
The cell-of-origin is switched to the CIO values of the Target cell, until the load value of the cell-of-origin is less than first
Given threshold, or until the load value of the cell-of-origin is higher than the first given threshold, but the Target cell
MLB can not be carried out with the cell-of-origin again.
Alternatively, in any one in meeting following condition, the cell-of-origin determines the Target cell
MLB can not be carried out with the cell-of-origin again：
The load value of the Target cell is higher than the 3rd given threshold；
The UE of non-overlapping covering between the cell-of-origin and the Target cell；
CIO values for being switched to the Target cell from the cell-of-origin are adjusted to default maximum on；
CIO values for being switched to the cell-of-origin from the Target cell have been adjusted downward to default minimum value.
Alternatively, the cell-of-origin is it is determined that the load value of the cell-of-origin is higher than the first given threshold, but institute
After stating Target cell and can not carrying out MLB with the cell-of-origin again, also include：
The cell-of-origin determines and another Target cell for itself carrying out MLB.
Alternatively, the cell-of-origin load value be less than the second given threshold after, to adjusting upward after CIO
Value carries out rollback adjustment, including：
The cell-of-origin after load value is less than the second given threshold, from itself carried out all of MLB
In Target cell, rollback Target cell is selected；Wherein, for being switched to the rollback mesh from the cell-of-origin
The amplitude for adjusting upward corresponding to the CIO values of cell is marked more than for being switched to it from the cell-of-origin
The corresponding amplitude for adjusting upward of the CIO values of its Target cell；
The cell-of-origin for being switched to the CIO values of the rollback Target cell from the cell-of-origin to carrying out
Retract adjustment.
Alternatively, the cell-of-origin is to the CIO for being switched to the rollback Target cell from the cell-of-origin
Value carries out rollback adjustment, including：
The cell-of-origin is held consultation by with the rollback Target cell, and use is gradually reduced according to setting step-length
In the CIO values that the rollback Target cell is switched to from the cell-of-origin, until the load value of the cell-of-origin
Higher than the 4th given threshold；Or until the load value of the cell-of-origin is less than the 4th given threshold, but be used for
The size that the CIO values for being switched to the rollback Target cell from the cell-of-origin have retracted when not adjusting；Its
In, the 4th given threshold is less than first given threshold, higher than second given threshold.
Alternatively, the cell-of-origin is it is determined that the load value of the cell-of-origin is less than the 4th given threshold, but use
In the size that the CIO values that the rollback Target cell is switched to from the cell-of-origin have retracted when not adjusting
Afterwards, also include：
The cell-of-origin selects another rollback target from all Target cells for carrying out MLB with itself
Cell.
Alternatively, the cell-of-origin load value be less than the second given threshold after, to adjusting upward after CIO
Value carries out rollback adjustment, including：
If in setting duration, the load value of the cell-of-origin is consistently less than the second given threshold, then to upward
CIO values after adjustment carry out rollback adjustment.
The embodiment of the present invention provides a kind of load balancing apparatus, including：
Determining module, for after cell-of-origin load value is higher than the first given threshold, it is determined that being carried out with cell-of-origin
The Target cell of mobility load balancing MLB；
First adjusting module, for being held consultation by with the Target cell, to for from the cell-of-origin
The personalized skew CIO values of cell for being switched to the Target cell are adjusted upward；
Second adjusting module, for after the cell-of-origin load value is less than the second given threshold, to rise
CIO values after whole carry out rollback adjustment, wherein, to adjusting upward after CIO values carry out rollback adjustment after
CIO values less than the CIO values after adjusting upward, the CIO values institute after being adjusted upward more than or equal to this
Corresponding CIO values when not adjusting, second given threshold is less than first given threshold.
In the embodiment of the present invention, cell-of-origin load value be higher than the first given threshold after, it is determined that being carried out with itself
The Target cell of MLB, holds consultation, to for being switched to from cell-of-origin by with the Target cell for determining
The personalized skew CIO values of the cell of Target cell are adjusted upward；Load value in cell-of-origin is less than second
After given threshold, to adjusting upward after CIO values carry out rollback adjustment.Using the embodiment of the present invention, not only
Can realize that the inter-cell load based on MLB is balanced, can also be adjusted by the rollback to CIO values, it is real
The conflict between MLB and MRO is now avoided as far as possible.
Brief description of the drawings
Fig. 1 is the load-balancing method flow chart that the embodiment of the present invention one is provided；
Fig. 2 is the load-balancing method flow chart that the embodiment of the present invention two is provided；
Fig. 3 is load balancing apparatus structural representation provided in an embodiment of the present invention.
Specific embodiment
In the embodiment of the present invention, cell-of-origin load value be higher than the first given threshold after, it is determined that being carried out with itself
The Target cell of MLB, holds consultation, to for being switched to from cell-of-origin by with the Target cell for determining
The personalized skew CIO values of the cell of Target cell are adjusted upward；Load value in cell-of-origin is less than second
After given threshold, to adjusting upward after CIO values carry out rollback adjustment.Using the embodiment of the present invention, not only
Can realize that the inter-cell load based on MLB is balanced, can also be adjusted by the rollback to CIO values, it is real
The conflict between MLB and MRO is now avoided as far as possible.
The embodiment of the present invention is described in further detail with reference to Figure of description.
Embodiment one
As shown in figure 1, being the load-balancing method flow chart that the embodiment of the present invention one is provided, including following step
Suddenly：
S101：Cell-of-origin load value be higher than the first given threshold after, it is determined that carrying out the mesh of MLB with itself
Mark cell.
In specific implementation, cell-of-origin carries out own load assessment first, and evaluation index can include：Wirelessly
Resource utilization (can adopt and be expressed as a percentage), cell capacity grade (such as capacitance grade point 1~100
Grade), hardware resource load indicate (such as can include it is high, medium and low, overload overload indicate),
Transfer resource loads and indicates (can such as include that high, medium and low, overload overload is indicated), can use and hold
Amount (can adopt and be expressed as a percentage) etc..
Load value described in the embodiment of the present invention can be that the value based on every different evaluation index is obtained
Comprehensive index value, or default a certain evaluation index value, such as can by Radio Resource profit
With rate as load value, such as cell-of-origin is higher than 80% (the first given threshold) in wireless resource utility efficiency,
Start MLB, selection carries out the Target cell of MLB with itself.
In specific implementation, cell-of-origin can carry out load information interaction by with adjacent cell by X2 mouthfuls,
The minimum adjacent cell of selection current load value is used as Target cell.Or, cell-of-origin can also combine adjacent cell
Load value, and the quantity of the edge customer of adjacent cell covering Chong Die with the cell-of-origin to carry out selection target small
Area.
Alternatively, in order to reduce the information exchange between cell-of-origin and adjacent cell, cell-of-origin and adjacent cell it
Between carry out load information interaction before, can first based on UE measurement report (Measurement Report,
MR) adjacent cell is screened (description of detailed in Example two), then is born with the adjacent cell for filtering out
Carry information exchange.The process that load information interaction is carried out between cell-of-origin and adjacent cell can specifically include：Source
Load information from cell to adjacent cell acquisition request adjacent cell, adjacent cell notifies the load information of itself to source
Cell.
S102：Cell-of-origin is held consultation by with the Target cell, to for being switched to from the cell-of-origin
The personalized skew CIO values of the cell of the Target cell are adjusted upward；
In the step, cell-of-origin is by the result held consultation with Target cell：Cell-of-origin is to for from institute
State cell-of-origin and be switched to the personalized skew CIO values of cell of the Target cell and adjusted upward, target is small
Area for being switched to the CIO values of the cell-of-origin from the Target cell to being adjusted downwards.
Here, the CIO values after adjusting upward are more than the CIO values before its corresponding adjustment, downwards after adjustment
CIO values less than the CIO values before its corresponding adjustment.
In specific implementation, held consultation by X2 mouthfuls between cell-of-origin and Target cell.Specifically, source
Cell can send adjustment CIO values and (adjust upward for being switched to Target cell from cell-of-origin to Target cell
CIO values) request, Target cell according to either own cell loading condition etc. confirm can adjust the CIO
After value, to cell-of-origin feedback acknowledgment (Acknowledgement, Ack) information, then cell-of-origin is according to pre-
If adjusting step (such as 0.5dB) increase CIO values for being switched to Target cell from cell-of-origin, phase
Ying Di, Target cell reduces the CIO for being switched to cell-of-origin from the Target cell according to the modulation step-length
Value；Cell-of-origin reevaluates the size of own load value, if own load value is still very big, can again to mesh
Mark cell sends the request of adjustment CIO values, and after validation, both sides are according still further to default adjustment step for Target cell
Adjustment CIO values long；So repeat, until the load value of cell-of-origin is less than the threshold value for setting (hereinafter referred to as
It is the first given threshold), or, until the load value of cell-of-origin is still above the first given threshold, but should
Target cell cannot carry out MLB with the cell-of-origin, and now, cell-of-origin can change Target cell continuation
Perform above-mentioned steps.For details, reference can be made to the description of embodiment two.
S103：Cell-of-origin load value be less than the second given threshold after, to adjusting upward after CIO values carry out
Retract adjustment；Wherein, to adjusting upward after CIO values carry out the CIO values after rollback adjustment less than this to
CIO values after upper adjustment, CIO values after being adjusted upward more than or equal to this it is corresponding when not adjusting
CIO values, second given threshold is less than first given threshold.
Correspondingly, Target cell is based on the request of cell-of-origin rollback adjustment CIO values, after adjustment downwards before
Carry out rollback adjustment for being switched to the CIO values of cell-of-origin from Target cell, to downwards adjustment after CIO
Value carries out the CIO values after rollback adjustment more than the CIO values after the downward adjustment, downward less than or equal to this
CIO values when not adjusting corresponding to CIO values after adjustment.
Here, in order to reduce conflicting between MLB and MRO, cell-of-origin is consistently less than in load value
After two given thresholds setting duration, rollback adjustment can be carried out to adjusted CIO values before, namely reduce
The adjusted CIO values for being switched to Target cell from cell-of-origin, correspondingly, Target cell can increase
CIO values for being switched to cell-of-origin from Target cell.Retract before the process for adjusting is referred to and adjusted
The process of whole CIO values.Such as, cell-of-origin can send to Target cell and retract adjustment CIO values (downwards
Adjust the CIO values for being switched to Target cell from cell-of-origin) request, now, cell-of-origin is according to default
Adjusting step (such as 0.5dB) reduce CIO values for being switched to Target cell from cell-of-origin, target
Cell increases the CIO values for being switched to cell-of-origin from the Target cell according to default adjusting step, and to
Cell-of-origin feedback acknowledgment information, cell-of-origin reevaluates the size of own load value, if own load value is still very
It is small, the request of the adjustment CIO values that retract can be sent to Target cell again, Target cell is according still further to default
Adjusting step retract adjustment CIO values, until cell-of-origin load value higher than setting a threshold value (hereinafter referred to as
It is the 4th given threshold, less than first given threshold)；Or until the load value of cell-of-origin is less than the
Four given thresholds, but retracted when not adjusting for being switched to the CIO values of the Target cell from cell-of-origin
Size (correspondingly, for be switched to from the rollback Target cell CIO values of the cell-of-origin retracted to
Size when not adjusting), now, cell-of-origin can change Target cell and proceed the rollback adjustment of CIO values.
If having carried out MLB before cell-of-origin with multiple Target cells, cell-of-origin retracts in selection and adjusts CIO values
Target cell when, the Target cell before can selecting corresponding to the maximum CIO values of adjustment amplitude, below
Will be described further in embodiment two.
Embodiment two
As shown in Fig. 2 being the load-balancing method flow chart that the embodiment of the present invention two is provided, including following step
Suddenly：
S201：Monitor own load value in cell-of-origin.
In specific implementation, cell-of-origin can be using wireless resource utility efficiency as load value, to itself wireless money
Source utilization rate carries out real-time monitoring, judges whether to meet the trigger condition of MLB, namely judge Radio Resource
Whether utilization rate is higher than the first given threshold, such as 80%.
S202：Cell-of-origin determines each candidate's adjacent cell after load value is higher than the first given threshold.
Specifically, for each adjacent cell, it is determined that in preset duration, the satisfaction that cell-of-origin receives is pre-
If the ratio of the measurement report quantity of condition and the total measurement report quantity for receiving；Wherein, the satisfaction
Pre-conditioned measurement report refers to the Reference Signal Received Quality of the adjacent cell in the measurement report
(Reference Signal Receiving Power, RSRP) is between value and the RSRP values of the cell-of-origin
Difference higher than setting RSRP values, setting RSRP values be negative value；If it is determined that ratio higher than setting compare
Value, it is determined that the adjacent cell is candidate's adjacent cell.
In specific implementation, because the adjacent area quantity in the Neighboring Cell List of configuration in existing network typically all can be a lot,
If cell-of-origin carries out load information interaction with the cell in Neighboring Cell List successively, it will serious X2 mouthfuls of increase
Expense, influences MLB efficiency.Accordingly, as one kind preferred embodiment, enter with cell-of-origin in selection
Before the Target cell of row MLB, adjacent area screening can be first carried out, filter out candidate's adjacent cell and come small with source
Area carries out load information interaction.In embodiments of the present invention, if being directed to certain adjacent cell, what cell-of-origin received
Meet above-mentioned pre-conditioned measurement report quantity to be more than with the ratio of the total measurement report quantity for receiving
Setting ratio, such as larger than 1%, then using the adjacent cell as candidate's adjacent cell.It is above-mentioned it is pre-conditioned i.e.
Whether to weigh UE in cell-of-origin and the overlapping covered condition of adjacent cell.
S203：Cell-of-origin in each candidate's adjacent cell, determine load value less than the 3rd given threshold and with
There is at least one candidate's adjacent cell of the user equipment (UE) for overlapping covering, described the between the cell-of-origin
Three given thresholds are less than first given threshold；In at least one candidate adjacent cell, selection load
The minimum candidate's adjacent cell of value is used as the Target cell for carrying out with itself MLB.
In the step, cell-of-origin carries out load information interaction by with each candidate's adjacent cell, obtains each time
The load value of adjacent cell is selected, in each candidate's adjacent cell, reselection is small with the target that itself carries out MLB
Area.1) and 2) in specific implementation, Target cell can meet following condition 1), or meet simultaneously
Candidate's adjacent cell：
1) load value is less than the 3rd given threshold, is such as less than 60%；
2) in the presence of the edge UE of Chong Die covering between cell-of-origin；Such as, if the measurements that report of a certain UE
In report, the difference between the RSRP values of candidate's adjacent cell and the RSRP values of cell-of-origin is higher than setting
RSRP values (being negative value) or the difference between the RSRP values of cell-of-origin and the RSRP values of candidate's adjacent cell
Value is less than other setting RSRP values (be on the occasion of), then it is assumed that the UE is positioned at cell-of-origin and candidate neighbour
The overlapping covered edge UE of cell；
As one kind preferred embodiment (above-mentioned S203), if in the presence of the load value of multiple candidate's adjacent cells
Below the 3rd given threshold, and then select it in the presence of the edge UE of Chong Die covering all between cell-of-origin
The minimum candidate's adjacent cell of middle load value is used as the Target cell.
S204：Cell-of-origin is held consultation by with Target cell, to for being switched to Target cell from cell-of-origin
CIO values adjusted upward；
Correspondingly, Target cell for being switched to the CIO values of cell-of-origin from Target cell to carrying out to downward
It is whole.
Specifically, cell-of-origin is held consultation by with Target cell, according to setting step-length gradually increase for from
Cell-of-origin is switched to the CIO values of Target cell, until the load value of the cell-of-origin is less than the first setting threshold
Value, or until the load value of the cell-of-origin is higher than the first given threshold, but the Target cell can not be again
MLB is carried out with the cell-of-origin.
In specific implementation process, cell-of-origin after Target cell is chosen, i.e., into round robin load-balancing stream
Journey：Adjustment CIO values are initiated (to for being switched to Target cell from cell-of-origin to Target cell every time in cell-of-origin
CIO values adjusted upward) request after, Target cell after feedback acknowledgment information, cell-of-origin and mesh
Mark cell is each adjusted for being switched to Target cell from cell-of-origin respectively according to setting step-length (such as 0.5dB)
CIO values and the CIO values for being switched to cell-of-origin from Target cell, cell-of-origin confirm load value
Still without the request for being adjusted to be initiated to Target cell again during less than the first given threshold adjustment CIO values,
So repeat, until the load value of cell-of-origin is less than the first given threshold.
In order to reduce empty overhead, during adjustment is circulated, typically it is changed without carrying out MLB with cell-of-origin
Target cell, unless Target cell meets following condition 1)~3) in any one, it is impossible to it is small with source again
Area carries out MLB：
1) load value of Target cell is higher than the 3rd given threshold, such as 60%；
2) between cell-of-origin and the Target cell non-overlapping covering UE；
3) the CIO values for being switched to Target cell from cell-of-origin are adjusted to default maximum, such as CIO on
The span of value is [- 3,3], if the CIO values for being switched to Target cell from cell-of-origin are adjusted to 3 on, no
The CIO values can be adjusted upward again；
4) default minimum value has been adjusted downward to it for being switched to the CIO values of cell-of-origin from Target cell.
If during adjustment is circulated, the load value of cell-of-origin remains above the first given threshold, but current
Target cell can not be carried out after MLB with cell-of-origin again, then S202 or S203 is returned to, it is determined that small with source
Area carries out another Target cell of MLB, proceeds MLB.
S205：Cell-of-origin load value be less than the second given threshold after, from the institute for itself carrying out MLB
Have in Target cell, select rollback Target cell；To small for being switched to the rollback target from the cell-of-origin
The CIO values in area carry out rollback adjustment；Wherein, for being switched to the rollback Target cell from the cell-of-origin
The corresponding amplitude for adjusting upward of CIO values more than for being switched to other targets from the cell-of-origin
The corresponding amplitude for adjusting upward of the CIO values of cell；CIO values after to adjusting upward retract
CIO values after adjustment are less than the CIO values after adjusting upward, the CIO after being adjusted upward more than or equal to this
Corresponding CIO values when not adjusting of value, second given threshold is less than first given threshold.
Here, after cell-of-origin selection rollback Target cell, the adjustment CIO values that retract are sent to rollback Target cell
Request, now, cell-of-origin for being switched to the CIO values of the rollback Target cell from the cell-of-origin to entering
Row retracts and adjusts, and rollback Target cell from the rollback Target cell to for being switched to the cell-of-origin
CIO values carry out rollback adjustment, and CIO values that this is used to being switched to cell-of-origin from rollback Target cell are corresponding
Adjusted amplitude is more than the CIO values for being switched to the cell-of-origin from other Target cells downwards before
Corresponding downward adjusted amplitude；CIO after rollback adjustment is carried out to the CIO values after adjustment downwards
Value more than the CIO values after the downward adjustment, less than or equal to corresponding to the CIO values after the downward adjustment
CIO values when not adjusting.
In specific implementation process, cell-of-origin is monitored after MLB has been carried out with least one Target cell
Own load situation, if in setting duration (such as 3 hours), load value is consistently less than the second setting
Threshold value (such as 60%), then carry out rollback adjustment to the CIO values for adjusting upward.
In specific implementation, if having carried out MLB with multiple Target cells before cell-of-origin, cell-of-origin can
Rollback adjustment is carried out to adjust the maximum CIO values of amplitude before selection, namely is selected from each Target cell
Rollback Target cell, the adjustment amplitude of the CIO values corresponding to the rollback Target cell is maximum.
Specifically, cell-of-origin for being switched to the CIO values of rollback Target cell from cell-of-origin to carrying out rollback tune
It is whole, including：
Cell-of-origin is held consultation by with rollback Target cell, is gradually reduced for small from source according to setting step-length
Area is switched to the CIO values of the rollback Target cell, and (correspondingly, Target cell gradually increases for from described
Rollback Target cell is switched to the CIO values of the cell-of-origin), until the load value of cell-of-origin sets higher than the 4th
Determine threshold value (such as 70%)；Or until the load value of the cell-of-origin is less than the 4th given threshold, but use
In the size that the CIO values that the rollback Target cell is switched to from the cell-of-origin have retracted when not adjusting
(or retracted when not adjusting for being switched to the CIO values of the cell-of-origin from the rollback Target cell
Size)；Wherein, the 4th given threshold is less than first given threshold, is set higher than described second
Determine threshold value.
In specific implementation process, when cell-of-origin is held consultation every time with rollback Target cell, walked according to setting
The CIO value of adjustment that retracts long.After single rollback, if cell-of-origin load value is higher than the 4th given threshold,
Then stop the adjustment that retracts；If cell-of-origin load value be less than the 4th given threshold, but with the rollback Target cell it
Between the size that has retracted when not adjusting of CIO values, then change rollback Target cell, continue with change after
The rollback adjustment of CIO values is carried out between rollback Target cell；If cell-of-origin load value is less than the 4th setting threshold
Value, and the size not retracted also when not adjusting with the CIO values between rollback Target cell, then with the rollback
Target cell is held consultation again, the CIO values retracted between adjustment and the rollback Target cell.
In specific implementation, if there is the load value of cell-of-origin described above less than the 4th given threshold, but use
The situation of size when not adjusting that retracted in the CIO values that rollback Target cell is switched to from cell-of-origin, then
S205 can be returned, from all Target cells for carrying out MLB with cell-of-origin, another rollback mesh is selected
Mark cell.
Additionally provided based on same inventive concept, in the embodiment of the present invention a kind of corresponding with load-balancing method
Load balancing apparatus, due to principle and the embodiment of the present invention load-balancing method phase of the device solve problem
Seemingly, therefore the implementation of the device may refer to the implementation of method, repeat part and repeat no more.
As shown in figure 3, be load balancing apparatus structural representation provided in an embodiment of the present invention, including：
Determining module 31, for after cell-of-origin load value is higher than the first given threshold, it is determined that entering with cell-of-origin
The Target cell of row mobility load balancing MLB；
First adjusting module 32, for being held consultation by with the Target cell, to for small from the source
The personalized skew CIO values of cell that area is switched to the Target cell are adjusted upward；
Second adjusting module 33, for after the cell-of-origin load value is less than the second given threshold, to upward
CIO values after adjustment carry out rollback adjustment, wherein, to adjusting upward after CIO values carry out rollback adjustment
CIO values afterwards are less than the CIO values after adjusting upward, the CIO values after being adjusted upward more than or equal to this
Corresponding CIO values when not adjusting, second given threshold is less than first given threshold.
Alternatively, the determining module 31 specifically for：
In each candidate's adjacent cell, determine load value less than the 3rd given threshold and with the cell-of-origin it
Between exist overlap covering user equipment (UE) at least one candidate's adjacent cell；3rd given threshold is low
In first given threshold；It is determined that at least one candidate adjacent cell in, selection load value it is minimum
Candidate's adjacent cell as the Target cell.
Alternatively, the determining module 31 according to following steps specifically for determining each candidate's adjacent cell：
For each adjacent cell, it is determined that in preset duration, the default bar of satisfaction that the cell-of-origin receives
The ratio of the measurement report quantity of part and the total measurement report quantity for receiving；Wherein, it is described to meet default
The measurement report of condition refers to the Reference Signal Received Quality RSRP values of the adjacent cell in the measurement report
And higher than setting RSRP values, setting RSRP values are negative to the difference between the RSRP values of the cell-of-origin
Value；If it is determined that ratio higher than setting ratio, it is determined that the adjacent cell be candidate's adjacent cell.
Alternatively, first adjusting module 32 specifically for：
Held consultation by with the Target cell, gradually increased for from the cell-of-origin according to setting step-length
The CIO values of the Target cell are switched to, until the load value of the cell-of-origin is less than the first given threshold,
Or until the cell-of-origin load value be higher than the first given threshold, but the Target cell can not again with institute
Stating cell-of-origin carries out MLB.
Alternatively, in any one in meeting following condition, first adjusting module 32 determines institute
Stating Target cell can not carry out MLB with the cell-of-origin again：
The load value of the Target cell is higher than the 3rd given threshold；
The UE of non-overlapping covering between the cell-of-origin and the Target cell；
CIO values for being switched to the Target cell from the cell-of-origin are adjusted to default maximum on；
CIO values for being switched to the cell-of-origin from the Target cell have been adjusted downward to default minimum value.
Alternatively, the determining module 31 is additionally operable to, and determines that the source is small in first adjusting module 32
The load value in area is higher than the first given threshold, but the Target cell can not carry out MLB with the cell-of-origin again
Afterwards, it is determined that carrying out another Target cell of MLB with cell-of-origin.
Alternatively, second adjusting module 33 specifically for：
After the load value of the cell-of-origin is less than the second given threshold, MLB was carried out from the cell-of-origin
All Target cells in, select rollback Target cell；Wherein, it is described for being switched to from the cell-of-origin
The corresponding amplitude for adjusting upward of the CIO values of rollback Target cell from the cell-of-origin more than for cutting
Change to the corresponding amplitude for adjusting upward of the CIO values of other Target cells；To for from the cell-of-origin
The CIO values for being switched to the rollback Target cell carry out rollback adjustment.
Alternatively, second adjusting module 33 specifically for：
Held consultation by with the rollback Target cell, gradually reduced for from the source according to setting step-length
Cell is switched to the CIO values of the rollback Target cell, until the load value of the cell-of-origin sets higher than the 4th
Determine threshold value；Or until the load value of the cell-of-origin is less than the 4th given threshold, but for small from the source
Area is switched to the size that the CIO values of the rollback Target cell have retracted when not adjusting；Wherein, described
Four given thresholds are less than first given threshold, higher than second given threshold.
Alternatively, second adjusting module 33 is additionally operable to：
It is determined that the cell-of-origin load value be less than the 4th given threshold, but for from the cell-of-origin switching
After the size retracted when not adjusting to the CIO values of the rollback Target cell, carried out from cell-of-origin
Cross in all Target cells of MLB, select another rollback Target cell.
Alternatively, second adjusting module 33 specifically for：
If in setting duration, the load value of the cell-of-origin is consistently less than the second given threshold, then to upward
CIO values after adjustment carry out rollback adjustment.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or meter
Calculation machine program product.Therefore, the present invention can be using complete hardware embodiment, complete software embodiment or knot
Close the form of the embodiment in terms of software and hardware.And, the present invention can be used and wherein wrapped at one or more
Containing computer usable program code computer-usable storage medium (including but not limited to magnetic disk storage,
CD-ROM, optical memory etc.) on implement computer program product form.
The present invention is produced with reference to method according to embodiments of the present invention, device (system) and computer program
The flow chart and/or block diagram of product is described.It should be understood that can by computer program instructions realize flow chart and
/ or block diagram in each flow and/or the flow in square frame and flow chart and/or block diagram and/
Or the combination of square frame.These computer program instructions to all-purpose computer, special-purpose computer, insertion can be provided
The processor of formula processor or other programmable data processing devices is producing a machine so that by calculating
The instruction of the computing device of machine or other programmable data processing devices is produced for realizing in flow chart one
The device of the function of being specified in individual flow or multiple one square frame of flow and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in can guide computer or the treatment of other programmable datas to set
In the standby computer-readable memory for working in a specific way so that storage is in the computer-readable memory
Instruction produce include the manufacture of command device, the command device realization in one flow of flow chart or multiple
The function of being specified in one square frame of flow and/or block diagram or multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices, made
Obtain and series of operation steps is performed on computer or other programmable devices to produce computer implemented place
Reason, so as to the instruction performed on computer or other programmable devices is provided for realizing in flow chart one
The step of function of being specified in flow or multiple one square frame of flow and/or block diagram or multiple square frames.
, but those skilled in the art once know base although preferred embodiments of the present invention have been described
This creative concept, then can make other change and modification to these embodiments.So, appended right will
Ask and be intended to be construed to include preferred embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this hair to the present invention
Bright spirit and scope.So, if it is of the invention these modification 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 comprising these changes and modification.
Claims (20)
1. a kind of load-balancing method, it is characterised in that the method includes：
Cell-of-origin load value be higher than the first given threshold after, it is determined that with itself moving property load balancing
The Target cell of MLB；
The cell-of-origin is held consultation by with the Target cell, to for being switched to institute from the cell-of-origin
The personalized skew CIO values of cell for stating Target cell are adjusted upward；
The cell-of-origin load value be less than the second given threshold after, to adjusting upward after CIO values returned
Move back adjustment；Wherein, to adjusting upward after CIO values carry out the CIO values after rollback adjustment less than this is upward
CIO values after adjustment, CIO when not adjusting corresponding to CIO values after being adjusted upward more than or equal to this
Value, second given threshold is less than first given threshold.
2. the method for claim 1, it is characterised in that the cell-of-origin determines to be carried out with itself
The Target cell of MLB, including：
The cell-of-origin in each candidate's adjacent cell, determine load value less than the 3rd given threshold and with institute
State at least one candidate's adjacent cell of the user equipment (UE) covered in the presence of overlap between cell-of-origin；Described 3rd
Given threshold is less than first given threshold；
The cell-of-origin it is determined that at least one candidate adjacent cell in, the selection minimum candidate of load value
Adjacent cell is used as the Target cell.
3. method as claimed in claim 2, it is characterised in that the cell-of-origin is true according to following steps
Fixed each candidate's adjacent cell：
For each adjacent cell, it is determined that in preset duration, the default bar of satisfaction that the cell-of-origin receives
The ratio of the measurement report quantity of part and the total measurement report quantity for receiving；Wherein, it is described to meet default
The measurement report of condition refers to the Reference Signal Received Quality RSRP values of the adjacent cell in the measurement report
And higher than setting RSRP values, setting RSRP values are negative to the difference between the RSRP values of the cell-of-origin
Value；
If it is determined that ratio higher than setting ratio, it is determined that the adjacent cell be candidate's adjacent cell.
4. the method for claim 1, it is characterised in that the cell-of-origin by with the target
Cell is held consultation, to being carried out to rise for being switched to the CIO values of the Target cell from the cell-of-origin
It is whole, including：
The cell-of-origin is held consultation by with the Target cell, according to setting step-length gradually increase for from
The cell-of-origin is switched to the CIO values of the Target cell, until the load value of the cell-of-origin is less than first
Given threshold, or until the load value of the cell-of-origin is higher than the first given threshold, but the Target cell
MLB can not be carried out with the cell-of-origin again.
5. method as claimed in claim 4, it is characterised in that any one in following condition is met
When planting, the cell-of-origin determines that the Target cell can not carry out MLB with the cell-of-origin again：
The load value of the Target cell is higher than the 3rd given threshold；
The UE of non-overlapping covering between the cell-of-origin and the Target cell；
CIO values for being switched to the Target cell from the cell-of-origin are adjusted to default maximum on；
CIO values for being switched to the cell-of-origin from the Target cell have been adjusted downward to default minimum value.
6. method as claimed in claim 4, it is characterised in that the cell-of-origin is it is determined that the source is small
The load value in area is higher than the first given threshold, but the Target cell can not carry out MLB with the cell-of-origin again
Afterwards, also include：
The cell-of-origin determines and another Target cell for itself carrying out MLB.
7. the method for claim 1, it is characterised in that the cell-of-origin is in load value less than the
After two given thresholds, to adjusting upward after CIO values carry out rollback adjustment, including：
The cell-of-origin after load value is less than the second given threshold, from itself carried out all of MLB
In Target cell, rollback Target cell is selected；Wherein, for being switched to the rollback mesh from the cell-of-origin
The amplitude for adjusting upward corresponding to the CIO values of cell is marked more than for being switched to it from the cell-of-origin
The corresponding amplitude for adjusting upward of the CIO values of its Target cell；
The cell-of-origin for being switched to the CIO values of the rollback Target cell from the cell-of-origin to carrying out
Retract adjustment.
8. method as claimed in claim 7, it is characterised in that the cell-of-origin is to for from the source
The CIO values that cell is switched to the rollback Target cell carry out rollback adjustment, including：
The cell-of-origin is held consultation by with the rollback Target cell, and use is gradually reduced according to setting step-length
In the CIO values that the rollback Target cell is switched to from the cell-of-origin, until the load value of the cell-of-origin
Higher than the 4th given threshold；Or until the load value of the cell-of-origin is less than the 4th given threshold, but be used for
The size that the CIO values for being switched to the rollback Target cell from the cell-of-origin have retracted when not adjusting；Its
In, the 4th given threshold is less than first given threshold, higher than second given threshold.
9. method as claimed in claim 8, it is characterised in that the cell-of-origin is it is determined that the source is small
The load value in area is less than the 4th given threshold, but for being switched to the rollback Target cell from the cell-of-origin
The size that has retracted when not adjusting of CIO values after, also include：
The cell-of-origin selects another rollback target from all Target cells for carrying out MLB with itself
Cell.
10. the method as described in claim 1~9 is any, it is characterised in that the cell-of-origin is in load value
After less than the second given threshold, to adjusting upward after CIO values carry out rollback adjustment, including：
If in setting duration, the load value of the cell-of-origin is consistently less than the second given threshold, then to upward
CIO values after adjustment carry out rollback adjustment.
11. a kind of load balancing apparatus, it is characterised in that the device includes：
Determining module, for after cell-of-origin load value is higher than the first given threshold, it is determined that being carried out with cell-of-origin
The Target cell of mobility load balancing MLB；
First adjusting module, for being held consultation by with the Target cell, to for from the cell-of-origin
The personalized skew CIO values of cell for being switched to the Target cell are adjusted upward；
Second adjusting module, for after the cell-of-origin load value is less than the second given threshold, to rise
CIO values after whole carry out rollback adjustment, wherein, to adjusting upward after CIO values carry out rollback adjustment after
CIO values less than the CIO values after adjusting upward, the CIO values institute after being adjusted upward more than or equal to this
Corresponding CIO values when not adjusting, second given threshold is less than first given threshold.
12. devices as claimed in claim 11, it is characterised in that the determining module specifically for：
In each candidate's adjacent cell, determine load value less than the 3rd given threshold and with the cell-of-origin it
Between exist overlap covering user equipment (UE) at least one candidate's adjacent cell；3rd given threshold is low
In first given threshold；It is determined that at least one candidate adjacent cell in, selection load value it is minimum
Candidate's adjacent cell as the Target cell.
13. devices as claimed in claim 12, it is characterised in that the determining module is specifically for root
Determine each candidate's adjacent cell according to following steps：
For each adjacent cell, it is determined that in preset duration, the default bar of satisfaction that the cell-of-origin receives
The ratio of the measurement report quantity of part and the total measurement report quantity for receiving；Wherein, it is described to meet default
The measurement report of condition refers to the Reference Signal Received Quality RSRP values of the adjacent cell in the measurement report
And higher than setting RSRP values, setting RSRP values are negative to the difference between the RSRP values of the cell-of-origin
Value；If it is determined that ratio higher than setting ratio, it is determined that the adjacent cell be candidate's adjacent cell.
14. devices as claimed in claim 11, it is characterised in that first adjusting module is specifically used
In：
Held consultation by with the Target cell, gradually increased for from the cell-of-origin according to setting step-length
The CIO values of the Target cell are switched to, until the load value of the cell-of-origin is less than the first given threshold,
Or until the cell-of-origin load value be higher than the first given threshold, but the Target cell can not again with institute
Stating cell-of-origin carries out MLB.
15. devices as claimed in claim 14, it is characterised in that any in following condition is met
When a kind of, first adjusting module determines that the Target cell can not carry out MLB with the cell-of-origin again：
The load value of the Target cell is higher than the 3rd given threshold；
The UE of non-overlapping covering between the cell-of-origin and the Target cell；
CIO values for being switched to the Target cell from the cell-of-origin are adjusted to default maximum on；
CIO values for being switched to the cell-of-origin from the Target cell have been adjusted downward to default minimum value.
16. devices as claimed in claim 14, it is characterised in that the determining module is additionally operable to,
First adjusting module determines the load value of the cell-of-origin higher than the first given threshold, but the target is small
Area can not be carried out after MLB with the cell-of-origin again, it is determined that carrying out another target of MLB with cell-of-origin
Cell.
17. devices as claimed in claim 11, it is characterised in that second adjusting module is specifically used
In：
After the load value of the cell-of-origin is less than the second given threshold, MLB was carried out from the cell-of-origin
All Target cells in, select rollback Target cell；Wherein, it is described for being switched to from the cell-of-origin
The corresponding amplitude for adjusting upward of the CIO values of rollback Target cell from the cell-of-origin more than for cutting
Change to the corresponding amplitude for adjusting upward of the CIO values of other Target cells；To for from the cell-of-origin
The CIO values for being switched to the rollback Target cell carry out rollback adjustment.
18. devices as claimed in claim 17, it is characterised in that second adjusting module is specifically used
In：
Held consultation by with the rollback Target cell, gradually reduced for from the source according to setting step-length
Cell is switched to the CIO values of the rollback Target cell, until the load value of the cell-of-origin sets higher than the 4th
Determine threshold value；Or until the load value of the cell-of-origin is less than the 4th given threshold, but for small from the source
Area is switched to the size that the CIO values of the rollback Target cell have retracted when not adjusting；Wherein, described
Four given thresholds are less than first given threshold, higher than second given threshold.
19. devices as claimed in claim 18, it is characterised in that second adjusting module is additionally operable to：
It is determined that the cell-of-origin load value be less than the 4th given threshold, but for from the cell-of-origin switching
After the size retracted when not adjusting to the CIO values of the rollback Target cell, carried out from cell-of-origin
Cross in all Target cells of MLB, select another rollback Target cell.
20. device as described in claim 11~19 is any, it is characterised in that second adjusting module
Specifically for：
If in setting duration, the load value of the cell-of-origin is consistently less than the second given threshold, then to upward
CIO values after adjustment carry out rollback adjustment.
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| CN201510454901.2A CN106714236A (en) | 2015-07-29 | 2015-07-29 | Load balancing method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510454901.2A CN106714236A (en) | 2015-07-29 | 2015-07-29 | Load balancing method and apparatus |
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