CN104735723A - Load balancing method in heterogeneous network - Google Patents
Load balancing method in heterogeneous network Download PDFInfo
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- CN104735723A CN104735723A CN201310713475.0A CN201310713475A CN104735723A CN 104735723 A CN104735723 A CN 104735723A CN 201310713475 A CN201310713475 A CN 201310713475A CN 104735723 A CN104735723 A CN 104735723A
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- cell
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- cre
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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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Abstract
A load balancing method in a heterogeneous network comprises the steps that a load of a cell exceeds a preset threshold, the updating resource states of other cells are triggered, and the measuring results of the other cells are reported periodically; if the measuring results are lower than a preset threshold value, according to a fixed step length, the CRE offset of the cell is adjusted; and the load of the cell is monitored again. After the embodiment of the invention is used, the CRE offset of the cell can be adjusted in a self-adaptation mode, effective load balancing is achieved, accordingly, system resources are used efficiently, and user service quality is guaranteed.
Description
Technical field
The application relates to communication technical field, more specifically, relates to the method for load balancing in a kind of heterogeneous network.
Background technology
In order to solve the load imbalance problem of heterogeneous network cross-layer minizone, improve the utilance of system resource, lte-a system introduces cell range expansion (CRE) technology.Namely the upper increase side-play amount of the Reference Signal Received Power (RSRP) in small-cell, makes the macrocell user near small-cell select to be linked into small-cell, thus alleviates the load of macrocell.
CRE is biased to be arranged larger, and the coverage of small-cell is expanded larger, has more macrocell user to move to small-cell, but simultaneously these users to be subject to the interference of macrocell stronger, more need the interference coordination mechanism strengthened to suppress to disturb; Otherwise CRE is biased to be arranged less (or CRE function is closed), then the coverage of small-cell is expanded less, moves the user come less from macrocell, then do not need to introduce the interference coordination mechanism strengthened, and simplifies realization.Therefore, CRE is biased to be needed to carry out reasonable disposition according to the loading condition of cross-layer community, while reduction interference and implementation complexity, realizes load balancing better, ensures the service quality of user.
In existing heterogeneous network, macrocell and small-cell configure CRE by Operation and Maintenance (OM) and are biased, and configuration mode is static, can't be biased along with the load variations adjustment CRE of macrocell and small-cell.
Load imbalance between macrocell and small-cell, or when being in load imbalance between the multiple small-cells within the scope of macrocell, the CRE of small-cell is biased can not be adjusted according to loaded self-adaptive, can not equally loaded effectively.And then the load of cross-layer minizone cannot be mated, and therefore can not effective utilization system resource, ensure the service quality of user.
Summary of the invention
The embodiment of the present invention proposes a kind of method of heterogeneous network load balancing, and can the CRE of self-adaptative adjustment small-cell be biased, equally loaded effectively, thus effective utilization system resource, ensure the service quality of user.
The technical scheme of the embodiment of the present invention is as follows:
A method for load balancing in heterogeneous network, described method comprises:
This cell load exceedes default thresholding, triggers other cell update resource statuss, and periodically reports the measurement result of other communities;
Described measurement result lower than preset threshold value, then according to fixed step size adjust this community cell range expansion CRE be biased;
Again monitor the load of this community.
This community described comprises macrocell, and other communities comprise small-cell.
Described cell load exceedes default thresholding, triggers other cell update resource statuss, and periodically reports the measurement result of other communities to comprise:
Macrocell load exceedes the first default thresholding, triggers small-cell and upgrades resource status, and periodically report the measurement result of small-cell to macrocell.
Described measurement result then adjusts according to fixed step size lower than the threshold value preset that the CRE of this community is biased to be comprised:
Described measurement result is lower than the first threshold preset, and the CRE of this small-cell is less than the first default maximum, then the CRE of this small-cell is biased increase by first fixed step size.
This community described comprises small-cell, and other communities comprise with small-cell with the macrocell covered.
Described cell load exceedes default thresholding, triggers other cell update resource statuss, and periodically reports the measurement result of other communities to comprise:
Small-cell load exceedes the second default thresholding, triggers described macrocell and upgrades resource status, and periodically report the measurement result of described macrocell to small-cell.
Described measurement result lower than the threshold value preset, then adjusts according to fixed step size that the CRE of this community is biased to be comprised:
The CRE of small-cell lower than the Second Threshold preset, is then biased minimizing second fixed step size by described measurement result.
Described by biased for the CRE of this community increase fixed step size after comprise further:
Biased for CRE increase/minimizing fixed step size is sent to other communities by X2 interface by this community.
As can be seen from technique scheme, this cell load exceedes default thresholding in embodiments of the present invention, triggers other cell update resource statuss, and periodically reports the measurement result of other communities; Described measurement result is lower than the threshold value preset, then the CRE adjusting this community according to regulation step-length is biased; Again monitor the load of this community.Owing to can the CRE of self-adaptative adjustment small-cell be biased, equally loaded effectively, thus effective utilization system resource, ensure the service quality of user.
Accompanying drawing explanation
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.
Embodiment
Express clearly clear for making the object, technical solutions and advantages of the present invention, below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
In embodiments of the present invention, when macrocell or small-cell overload, be biased by the CRE adjusting community, the load of balanced minizone effectively, thus effective utilization system resource, ensure the service quality of user.
See the method flow schematic diagram that accompanying drawing 1 is load balancing in heterogeneous network, specifically comprise the following steps:
101, this cell load exceedes default thresholding, triggers other cell update resource statuss, and periodically reports the measurement result of other communities.
Thresholding according to presetting judges whether this community transships, if this cell load exceedes default thresholding, then triggers other cell update resource statuss, and periodically reports the measurement result of other communities.
102, measurement result lower than preset threshold value, then according to fixed step size adjust this community CRE be biased.
The measurement result of other communities lower than the threshold value preset, then illustrates the load that can be biased by adjustment CRE this community balanced and other communities.Then, again detect the load of this community, if find this cell-overload, then again adjust.
Community in heterogeneous network comprises macrocell and small-cell.In the identical coverage of macrocell, there is at least one small-cell.Technical scheme of the present invention is described in detail respectively below with regard to macrocell overloading and small-cell overload.
A: macrocell load exceedes the first default thresholding.
101a, macrocell, to all small-cells triggers resource state updating process within the scope of it, require that small-cell is according to the measuring object periodic report measurement result of request.
102a, macrocell, according to the measurement result of the multiple small-cells received, judge the loading condition of small-cell, one by one until travel through all small-cells:
If the measurement result value that small-cell reports is lower than the first threshold preset, and the CRE of small-cell is less than the first default maximum, then the CRE of small-cell is biased increase by first fixed step size.
Small-cell increases CRE and is biased and the fractional load of macrocell transfer can be come, to reduce the load of macrocell.Wherein, the first thresholding, first threshold, the first maximum and the first fixed step size are all preset according to concrete system mode.
103a, macrocell, by biased by X2 interface for the CRE after independently upgrading, send to corresponding small-cell, to hold consultation, and wait for the confirmation of small-cell.
B: small-cell load exceedes the second default thresholding.
101b, small-cell, to the macrocell triggers resource state updating process covered, require that macrocell is according to the measuring object periodic report measurement result of request.
102b, small-cell, according to the measurement result of the macrocell received, judge the loading condition of macrocell:
If the CRE of small-cell lower than the Second Threshold preset, is then biased minimizing second fixed step size by the measurement result that macrocell reports.
Small-cell minimizing CRE is biased by small-cell CRE area reduction or can close this function, to reduce the load of small-cell.Wherein, the second thresholding, Second Threshold, the second maximum and the second fixed step size are all preset according to concrete system mode.
CRE after independently upgrading is biased and sends to corresponding macrocell by X2 interface by 103c, small-cell, to hold consultation, and waits for the confirmation of macrocell.
See the schematic diagram that accompanying drawing 2 is after employing technical solution of the present invention adjusts.When macrocell heavy duty, small-cell 1 and small-cell 2 are in underloading, and increase biased for its CRE, cell range is expanded further, can reduce the load of macrocell.During the heavy duty of small-cell 3, be biased by reducing its CRE, the fractional load in CRE region is moved to macrocell, reduce the load of small-cell 3.Visible, the load balancing between macrocell and three small-cells can be realized by said process, thus ensure the service quality of user better.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the method for load balancing in heterogeneous network, it is characterized in that, described method comprises:
This cell load exceedes default thresholding, triggers other cell update resource statuss, and periodically reports the measurement result of other communities;
Described measurement result lower than preset threshold value, then according to fixed step size adjust this community cell range expansion CRE be biased;
Again monitor the load of this community.
2. the method for load balancing in heterogeneous network according to claim 1, it is characterized in that, this community described comprises macrocell, and other communities comprise small-cell.
3. the method for load balancing in heterogeneous network according to claim 2, it is characterized in that, described cell load exceedes default thresholding, triggers other cell update resource statuss, and periodically reports the measurement result of other communities to comprise:
Macrocell load exceedes the first default thresholding, triggers small-cell and upgrades resource status, and periodically report the measurement result of small-cell to macrocell.
4. the method for load balancing in heterogeneous network according to claim 2, is characterized in that, described measurement result then adjusts according to fixed step size lower than the threshold value preset that the CRE of this community is biased to be comprised:
Described measurement result is lower than the first threshold preset, and the CRE of this small-cell is less than the first default maximum, then the CRE of this small-cell is biased increase by first fixed step size.
5. the method for load balancing in heterogeneous network according to claim 1, it is characterized in that, this community described comprises small-cell, and other communities comprise with small-cell with the macrocell covered.
6. the method for load balancing in heterogeneous network according to claim 5, it is characterized in that, described cell load exceedes default thresholding, triggers other cell update resource statuss, and periodically reports the measurement result of other communities to comprise:
Small-cell load exceedes the second default thresholding, triggers described macrocell and upgrades resource status, and periodically report the measurement result of described macrocell to small-cell.
7. the method for load balancing in heterogeneous network according to claim 5, is characterized in that, described measurement result lower than the threshold value preset, then adjusts according to fixed step size that the CRE of this community is biased to be comprised:
The CRE of small-cell lower than the Second Threshold preset, is then biased minimizing second fixed step size by described measurement result.
8. the method for load balancing in heterogeneous network according to claim 1, is characterized in that, described by biased for the CRE of this community increase fixed step size after comprise further:
Biased for CRE increase/minimizing fixed step size is sent to other communities by X2 interface by this community.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017071595A1 (en) * | 2015-10-30 | 2017-05-04 | 普天信息技术有限公司 | Interference management method and system |
| CN107566982A (en) * | 2017-09-08 | 2018-01-09 | 苏州大学 | Continuous cell Zoom method based on random geometry isomery cellular network |
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| CN102883328A (en) * | 2011-07-15 | 2013-01-16 | 上海贝尔股份有限公司 | Method and device for adjusting range expansion offset value of micro cell |
| CN103096334A (en) * | 2011-11-08 | 2013-05-08 | 华为技术有限公司 | Method and device for determining community extension bias boundary |
| CN103139890A (en) * | 2011-12-01 | 2013-06-05 | 株式会社Ntt都科摩 | Method of adjusting community coverage area in communication system, base station and low-power node |
| 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 |
| WO2013166694A1 (en) * | 2012-05-11 | 2013-11-14 | 华为技术有限公司 | Method, device and system for configuring cell range expansion bias |
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- 2013-12-20 CN CN201310713475.0A patent/CN104735723B/en not_active Expired - Fee Related
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| CN102883328A (en) * | 2011-07-15 | 2013-01-16 | 上海贝尔股份有限公司 | Method and device for adjusting range expansion offset value of micro cell |
| CN103096334A (en) * | 2011-11-08 | 2013-05-08 | 华为技术有限公司 | Method and device for determining community extension bias boundary |
| CN103139890A (en) * | 2011-12-01 | 2013-06-05 | 株式会社Ntt都科摩 | Method of adjusting community coverage area in communication system, base station and low-power node |
| 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 |
| WO2013166694A1 (en) * | 2012-05-11 | 2013-11-14 | 华为技术有限公司 | Method, device and system for configuring cell range expansion bias |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017071595A1 (en) * | 2015-10-30 | 2017-05-04 | 普天信息技术有限公司 | Interference management method and system |
| CN107566982A (en) * | 2017-09-08 | 2018-01-09 | 苏州大学 | Continuous cell Zoom method based on random geometry isomery cellular network |
| CN107566982B (en) * | 2017-09-08 | 2020-03-10 | 苏州大学 | Continuous cell scaling method based on random geometric heterogeneous cellular network |
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| CN104735723B (en) | 2019-04-26 |
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Granted publication date: 20190426 Termination date: 20211220 |