CN104735723B - A kind of method of load balancing in heterogeneous network - Google Patents
A kind of method of load balancing in heterogeneous network Download PDFInfo
- Publication number
- CN104735723B CN104735723B CN201310713475.0A CN201310713475A CN104735723B CN 104735723 B CN104735723 B CN 104735723B CN 201310713475 A CN201310713475 A CN 201310713475A CN 104735723 B CN104735723 B CN 104735723B
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- cell
- macrocell
- cre
- load
- measurement result
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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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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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A kind of method of load balancing in heterogeneous network, which comprises this cell load is more than preset thresholding, triggers other cell update resource status, and periodically report the measurement result of other cells；The measurement result is lower than preset threshold value, then the CRE biasing of the cell is adjusted according to fixed step size；The load of this cell is monitored again.After the embodiment of the present invention, the CRE biasing of cell, effectively equally loaded, so that effective utilization system resource, guarantees the service quality of user can be adaptively adjusted.
Description
Technical field
This application involves fields of communication technology, more particularly, to a kind of method of load balancing in heterogeneous network.
Background technique
In order to solve the problems, such as the load imbalance of heterogeneous network cross-layer minizone, the utilization rate of system resource, LTE-A are improved
System introduces cell range extension (CRE) technology.Increase by one i.e. on the Reference Signal Received Power of cell (RSRP)
Offset, so that the macrocell user selection close to cell is linked into cell, to mitigate the load of macrocell.
CRE biasing is arranged bigger, and the coverage area of cell is expanded bigger, has more macrocell users to move to
Cell, but these users are stronger by the interference of macrocell simultaneously, the interference coordination mechanism for more needing to enhance inhibit
Interference；Conversely, CRE biasing is arranged smaller (or CRE function close), then the coverage area of cell is expanded smaller, from macro
The user that zone migration comes is less, then does not need the interference coordination mechanism for introducing enhancing, simplify realization.Therefore, CRE is biased
It needs to carry out reasonable disposition according to the loading condition of cross-layer cell, while reducing interference and implementation complexity, preferably in fact
Existing load balancing, guarantees the service quality of user.
In existing heterogeneous network, macrocell and cell configure CRE by Operation and Maintenance (OM) and bias, and configuration mode is quiet
State, adjustment CRE biasing can't be changed with the load of macrocell and cell.
It is loaded between multiple small cells when load imbalance between macrocell and cell, or within the scope of macrocell
When unbalanced, the CRE biasing of cell cannot be adjusted according to loaded self-adaptive, cannot effectively equally loaded.And then can not
Load with cross-layer minizone, therefore it is unable to effective utilization system resource, guarantee the service quality of user.
Summary of the invention
A kind of method that the embodiment of the present invention proposes heterogeneous network load balancing, the CRE that can adaptively adjust cell are inclined
It sets, effectively equally loaded, so that effective utilization system resource, guarantees the service quality of user.
The technical solution of the embodiment of the present invention is as follows:
A kind of method of load balancing in heterogeneous network, which comprises
This cell load is more than preset thresholding, triggers other cell update resource status, and periodically report other small
The measurement result in area；
The measurement result is lower than preset threshold value, then the cell range extension CRE of the cell is adjusted according to fixed step size
Biasing；
The load of this cell is monitored again.
Described cell includes macrocell, other cells include cell.
Described cell load is more than preset thresholding, triggers other cell update resource status, and periodically report it
He includes: at the measurement result of cell
Macrocell load is more than preset first thresholding, triggers small cell update resource status, and periodically to macrocell
Report the measurement result of cell.
The measurement result is biased lower than the CRE that preset threshold value then adjusts the cell according to fixed step size
The measurement result is lower than preset first threshold, and the CRE of the cell is less than preset first maximum value, then
The CRE biasing of the cell is increased by the first fixed step size.
Described cell includes cell, other cells include the macrocell with cell with covering.
Described cell load is more than preset thresholding, triggers other cell update resource status, and periodically report it
He includes: at the measurement result of cell
Small cell load is more than preset second thresholding, triggers the macrocell and updates resource status, and periodically to small
Cell reports the measurement result of the macrocell.
The measurement result is lower than preset threshold value, then the CRE biasing for adjusting the cell according to fixed step size includes:
The measurement result is lower than preset second threshold, then the CRE biasing of cell is reduced by the second fixed step size.
Further include: after the CRE biasing increase fixed step size by the cell
CRE biasing increase/reduction fixed step size is sent to other cells by X2 interface by this cell.
As can be seen that this cell load is more than preset thresholding, touching in embodiments of the present invention from above-mentioned technical proposal
Other cell update resource status are sent out, and periodically report the measurement result of other cells；The measurement result is lower than preset
Threshold value then adjusts the CRE biasing of the cell according to regulation step-length；The load of this cell is monitored again.Due to can adaptively adjust
The CRE of whole cell is biased, effectively equally loaded, so that effective utilization system resource, guarantees the service quality of user.
Detailed description of the invention
Fig. 1 is the method flow schematic diagram of load balancing in heterogeneous network；
Fig. 2 is the embodiment schematic diagram of load balancing in heterogeneous network.
Specific embodiment
To make the object, technical solutions and advantages of the present invention express to be more clearly understood, with reference to the accompanying drawing and specifically
The present invention is further described in more detail for embodiment.
In embodiments of the present invention, it in macrocell or small cell overload, is biased by adjusting the CRE of cell, effectively
The load of balanced minizone, so that effective utilization system resource, guarantees the service quality of user.
It is the method flow schematic diagram of load balancing in heterogeneous network referring to attached drawing 1, specifically includes the following steps:
101, this cell load is more than preset thresholding, triggers other cell update resource status, and periodically report it
The measurement result of his cell.
Judge whether this cell overloads according to preset thresholding, if this cell load is more than preset thresholding, triggers it
His cell update resource status, and periodically report the measurement result of other cells.
102, measurement result is lower than preset threshold value, then the CRE biasing of the cell is adjusted according to fixed step size.
The measurement result of other cells is lower than preset threshold value, then it is small can to carry out balanced sheet by adjusting CRE biasing for explanation
The load in area and other cells.Then, the load of this cell is detected again, if finding this cell-overload, is adjusted again.
Cell in heterogeneous network includes macrocell and cell.In the identical coverage area of macrocell, there is at least one small
Cell.Separately below with regard to macrocell overloading and the small cell-overload technical solution that the present invention will be described in detail.
A: macrocell load is more than preset first thresholding.
All cells into its of 101a, macrocell trigger resource status renewal process, it is desirable that small cell according to
The measurement object periodic report measurement result of request.
The measurement result of 102a, macrocell multiple cells based on the received, judges the loading condition of cell one by one,
Until traversing all cells:
If the measurement result value that cell reports is lower than preset first threshold, and the CRE of cell is less than preset the
The CRE biasing of cell is then increased by the first fixed step size by one maximum value.
Cell, which increases CRE biasing, to be shifted by the fractional load of macrocell, to reduce the load of macrocell.Its
In, the first thresholding, first threshold, the first maximum value and the first fixed step size are preset according to specific system mode
's.
Autonomous updated CRE biasing is passed through X2 interface by 103a, macrocell, corresponding cell is sent to, to carry out
Negotiate, and waits the confirmation of cell.
B: small cell load is more than preset second thresholding.
101b, cell trigger resource status renewal process to the macrocell of same covering, it is desirable that macrocell is according to request
Measurement object periodic report measurement result.
The measurement result of 102b, cell macrocell based on the received, judges the loading condition of macrocell:
If the measurement result that macrocell reports is lower than preset second threshold, the CRE biasing of cell is reduced second
Fixed step size.
Cell, which reduces CRE biasing, by cell CRE area reduction or to close the function, to reduce the negative of cell
It carries.Wherein, the second thresholding, second threshold, the second maximum value and the second fixed step size are preparatory according to specific system mode
Setting.
Autonomous updated CRE biasing is sent to corresponding macrocell by X2 interface by 103c, cell, to be assisted
Quotient, and wait the confirmation of macrocell.
It is using technical solution of the present invention schematic diagram adjusted referring to attached drawing 2.When macrocell when overloaded, 1 He of cell
Cell 2 is in underloading, its CRE is biased and is increased, and cell range is further expanded, and can reduce the load of macrocell.Cell 3
When overloaded, by reducing its CRE biasing, the fractional load in the region CRE is moved into macrocell, reduces the load of cell 3.
As it can be seen that the load balancing between macrocell and three cells can be realized by the above process, to better ensure that user's
Service quality.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (4)
1. a kind of method of load balancing in heterogeneous network, which is characterized in that the described method includes:
Macrocell load is more than preset first thresholding, triggers small cell update resource status, and periodically report to macrocell
The measurement result of cell；The measurement result is the loading condition of cell；
If the measurement result is lower than preset first threshold, and the CRE of the cell is less than preset first maximum value, then
The CRE biasing of the cell is increased by the first fixed step size；
The load of macrocell is monitored again.
2. according to claim 1 in heterogeneous network load balancing method, which is characterized in that the CRE by the cell
Biasing increases by the first fixed step size
CRE is biased the first fixed step size of increase by X2 interface and is sent to the cell by macrocell.
3. a kind of method of load balancing in heterogeneous network, which is characterized in that the described method includes:
Small cell load is more than preset second thresholding, and triggering macrocell updates resource status, and periodically reports to cell
The measurement result of the macrocell；The measurement result is the loading condition of macrocell；
If the measurement result is lower than preset second threshold, the CRE biasing of cell is reduced by the second fixed step size；
The load of cell is monitored again.
4. according to claim 3 in heterogeneous network load balancing method, which is characterized in that the CRE by cell is inclined
It sets after reducing by the second fixed step size and further includes:
CRE is biased the second fixed step size of reduction by X2 interface and is sent to macrocell by cell.
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| CN201310713475.0A CN104735723B (en) | 2013-12-20 | 2013-12-20 | A kind of method of load balancing in heterogeneous network |
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| CN106658552B (en) * | 2015-10-30 | 2019-09-17 | 普天信息技术有限公司 | Interference management method, system |
| CN107566982B (en) * | 2017-09-08 | 2020-03-10 | 苏州大学 | Continuous cell scaling method based on random geometric heterogeneous cellular network |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103369610A (en) * | 2012-03-27 | 2013-10-23 | 北京时分移动通信产业协会 | Self-adaptive setting method and device for CRE bias |
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| CN102883328B (en) * | 2011-07-15 | 2015-03-04 | 上海贝尔股份有限公司 | Method and device for adjusting range expansion offset value of micro cell |
| CN103096334B (en) * | 2011-11-08 | 2016-09-21 | 华为技术有限公司 | Determine the method and device on cell extension biasing border |
| CN103139890B (en) * | 2011-12-01 | 2017-11-24 | 株式会社Ntt都科摩 | Method, base station and the low power nodes of cell coverage area are adjusted in communication system |
| CN103999498B (en) * | 2012-05-11 | 2018-03-09 | 华为技术有限公司 | Configure the method, apparatus and system of cell coverage expansion offset |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103369610A (en) * | 2012-03-27 | 2013-10-23 | 北京时分移动通信产业协会 | Self-adaptive setting method and device for CRE bias |
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