CN101128011B - A method for automatic cell interference optimization - Google Patents
A method for automatic cell interference optimization Download PDFInfo
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- CN101128011B CN101128011B CN2007101535901A CN200710153590A CN101128011B CN 101128011 B CN101128011 B CN 101128011B CN 2007101535901 A CN2007101535901 A CN 2007101535901A CN 200710153590 A CN200710153590 A CN 200710153590A CN 101128011 B CN101128011 B CN 101128011B
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Abstract
The utility model discloses a method to optimize cell interference automatically, which is used to find the base station and reduce the cell interference. The utility model comprises the following steps: the base station acquires the signals of other cells, and when in judgment of cell interference, the base station determines the position relationship between the base station and the base stations of other cells producing interference, and then decides to notify the base stations of other cells to eliminate or adjust coverage overlapping according to the position relationship. When in adjustment, for the cell that cannot be a switching adjacent cell, the coverage is needed to eliminate so as to eliminate the interference signals; for a cell that can be a switching adjacent cell, the coverage overlapping is needed to reduce so as to reduce the interference signals. The utility model has the advantages that the automatic detection and optimization of cell interference can be realized, a plurality of man-power and material resources needed in traditional network optimization is saved, the cost of network operation is reduced and the network performance, accuracy and precision of detection and optimization is improved.
Description
Technical field
The present invention relates to radio honeycomb communication system, relate in particular to a kind of method of carrying out cell interference optimization automatically in Long Term Evolution (LTE, the Long TermEvolution) GSM.
Background technology
MANET (SON, Self-Organization Network) is a kind of technology of carrying out network configuration and optimization automatically.These technological characteristics are self-configuring self-optimizings; This technology is used in LTE and is made that LTE base station (eNB) can be according to the automatic configuration network parameter of certain measurement; And carry out Automatic Optimal according to network change, thus keep network performance optimum, practice thrift lot of manpower and material resources simultaneously.
Interference Control between the sub-district is an important topic in the mobile communications network.Should keep certain covering to overlap between the sub-district, cover and professional continuity guaranteeing, can not making again overlaps covers excessively, otherwise repeats to cover the performance and the efficient of the system that influences with mutual interference meeting mutually.Therefore, area interference control is exactly to guarantee service feature and to cover under the successional situation that the signal that as far as possible reduces the minizone overlaps and signal contamination.
Area interference can be divided into two types:
One type from can not be as the sub-district (as there not being the high station of geographical neighbouring relations) of switching the adjacent area, and it disturbs normally because improper covering or signal leakage are brought, and need eliminate interference signal as far as possible, for example, and the interference that the sub-district C shown in Fig. 1 produces sub-district A;
Another kind of from can still because the improper overlapping region that causes of covering is excessive, needing the control interference signal as the sub-district of switching the adjacent area, for example, the sub-district B among Fig. 1 is to the interference of sub-district A generation.
Thereby, need a kind of method of cell interference optimization, guaranteeing service feature and covering under the successional situation that the signal that as far as possible reduces the minizone overlaps and signal contamination.
Summary of the invention
Technical problem to be solved by this invention is, a kind of method of carrying out cell interference optimization automatically is provided.Guaranteeing service feature and covering under the successional situation that area interference is optimized, and the same frequency that as far as possible reduces the minizone disturbs and signal contamination.
The present invention provides a kind of method of carrying out cell interference optimization automatically; Be used for the base station discovery and reduce area interference; At first the base station obtains the signal of other sub-districts; When there was area interference in judgement, the position relation of base station and this base station under other sub-districts of confirm to produce disturbing notified under other sub-districts the base station to eliminate or adjustment covers overlapping according to this position relation decision.
Said base station obtains the signals step of other sub-districts, is through the terminal to report cell measurement reporting, perhaps obtains other cell signal information through base station active scan downstream signal.
Said terminal periodic or reporting events cell measurement reporting comprise the reception signal strength signal intensity of other sub-districts and the positional information at cell ID and terminal oneself in this measurement report.
The signal strength signal intensity that self belongs to sub-district and other sub-districts is detected at said terminal; When the signal strength signal intensity in other sub-districts surpasses the strength threshold value; Said measurement report is sent to the base station in the terminal, comprises sign and location information of terminals that signal strength signal intensity surpasses the sub-district of threshold value in this measurement report.
After said base station received other cell signal information, the base station judged according to the signal strength signal intensity of other sub-districts, the base station location under other sub-districts, the position at terminal and the cell coverage area of the network planning whether the signal of other sub-districts constitutes interference to this sub-district.
Said base station based on other sub-districts of produce disturbing under the position relation of base station, judgement is that the base station covers the improper interference that causes under other sub-districts, then requires other adjustment sub-districts, base stations to cover, during adjustment:
For not needing to eliminate covering as the sub-district of switching the adjacent area to eliminate interference signal;
For can be used as the sub-district of switching the adjacent area, need to reduce to cover overlapping to reduce interference signal.
Use the method for the invention can realize the automatic detection and the optimization of area interference, save legacy network and optimize needed a large amount of manpower and materials, reduce the network O&M cost; The real-time that this method detects and optimizes automatically helps to promote network performance; Simultaneously, this method has been considered the stability of Interference Detection on time and space, helps improving accuracy and the accuracy that detects and optimize.
Description of drawings
Fig. 1 is the area interference sketch map;
Fig. 2 is a cell interference optimization step sketch map.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment interference optimization method according to the invention is elaborated.
The objective of the invention is through detection,, find and the minimizing area interference in conjunction with information such as base station locations to abnormal signal, service exception.
For achieving the above object, the base station reports terminal (UE) or the signal of other sub-districts that self scans contrasts with affiliated separately base station location, if judge it is that other base stations cover the improper interference that causes, then requires other base stations to adjust sub-districts and covers.During adjustment:
For can not need eliminate interference signal as far as possible as the sub-district of switching the adjacent area;
For can be used as the sub-district of switching the adjacent area, need to reduce interference signal, reduce to cover overlapping.
Based on above-mentioned optimization method, further implementation step comprises:
Step 210: according to the base station requirement, terminal periodic or reporting events measurement report comprise the reception signal strength signal intensity of other sub-districts and the positional information of oneself in this measurement report; Perhaps, downstream signal also can oneself be scanned in the base station, obtains about other cell signal strength information;
Step 220: the base station judges based on the signal strength signal intensity of other sub-districts, the base station location under the sub-district, the position at terminal and the cell coverage area of the network planning (or through optimizing) whether the signal of other sub-districts constitutes interference to this sub-district; Change step 230 if cause to disturb, otherwise change step 210;
Step 230: according to certain zone, detect number of times in a period of time from the interference of specific cell; Disturb the adjustment thresholding if surpass; This thresholding can be provided with on the backstage; The base station is thought needs other adjustment sub-districts, base station to cover and the adjustment type, and confirms that elimination still is to control to cover to overlap, otherwise changes step 210;
Step 240: the base station is notified other base stations to carry out the sub-district and is covered adjustment, optimizes area interference, and concrete adjustment mode is not in this discussion.
Further combined with the relation of sub-district C among Fig. 1 and sub-district A, it is following to describe specific embodiment one below:
The signal of Serving cell A and other sub-districts is measured at the terminal, and when sub-district C reached the thresholding (relative value like sub-district C and sub-district a-signal reaches certain value) of base station sets, measurement report was sent to the base station in the terminal, comprises sign and the location information of terminals of sub-district C;
After measurement report was received in the base station, the positional information of base station, inspection sub-district C place (if there is not information, then need be obtained; As passing through the X2 interface signaling); Contrast network projecting parameter finds that sub-district C should not have overlapping covering with sub-district A, thinks that promptly sub-district C constitutes interference to sub-district A;
The number of times that terminal to report sub-district C disturbs sub-district A in the accumulative total same position zone, base station; If reach predetermined threshold value (regional extent, time span and threshold value can ruuning situation Network Based adjust) within a certain period of time; Think that then sub-district C need adjust covering, eliminate interference sub-district A;
Base station under the notifying cell C of base station requires its signal of controlling sub-district C A direction toward the sub-district (hanging the high district pilots power that perhaps reduces as reducing antenna), avoids the interference to sub-district A.
Further combined with the relation of sub-district B among Fig. 1 and sub-district A, it is following to describe specific embodiment two below:
The signal of Serving cell A and other sub-districts is measured at the terminal, according to the requirement of base station, and the signal of periodicity reporting subdistrict B and sub-district A, and comprise location information of terminals;
After measurement report is received in the base station; Whether the signal of inspection sub-district B reaches interference threshold; If, contrast the coverage of the terminal location and the network planning (or through optimizing) again because sub-district B is the abutting subdistrict of sub-district A; If it is excessive to find that B excessive covering in sub-district causes with the overlapping of sub-district A, think that promptly sub-district B is to sub-district A excessive interference;
The base station detects sub-district B to the number of times that sub-district A disturbs in the accumulative total same position zone, if reach predetermined threshold value within a certain period of time, thinks that then sub-district B need adjust covering, reduces the interference to sub-district A;
Base station under the notifying cell B of base station requires its coverage that reduces sub-district B (as increasing Downtilt or reducing district pilots power), reduces the interference to sub-district A.
Use interference optimization method of the present invention can realize the automatic detection and the optimization of area interference, save legacy network and optimize needed a large amount of manpower and materials, reduce the network O&M cost.Automatically the real-time that detects and optimize helps to promote network performance.Simultaneously, this method has been considered the stability of Interference Detection on time and space, helps improving accuracy and the accuracy that detects and optimize.
The preferred embodiments of the present invention that are merely described herein are not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Therefore, all any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improve and upgrade or the like, all should be included within protection scope of the present invention.
Claims (4)
1. a method of carrying out cell interference optimization automatically is used for the base station discovery and reduces area interference, it is characterized in that:
The base station obtains the signal of other sub-districts, and when there was area interference in judgement, the position relation of base station and this base station under other sub-districts of confirm to produce disturbing notified under other sub-districts the base station to eliminate or adjustment covers overlapping based on this position relation decision;
Said base station obtains the signals step of other sub-districts, is through the terminal to report cell measurement reporting, perhaps obtains other cell signal information through base station active scan downstream signal;
Said base station based on other sub-districts of produce disturbing under the position relation of base station, judgement is that the base station covers the improper interference that causes under other sub-districts, then requires other adjustment sub-districts, base stations to cover, during adjustment:
For not needing to eliminate covering as the sub-district of switching the adjacent area to eliminate interference signal;
For can be used as the sub-district of switching the adjacent area, need to reduce to cover overlapping to reduce interference signal.
2. the method for claim 1 is characterized in that:
Said terminal periodic or reporting events cell measurement reporting comprise the reception signal strength signal intensity of other sub-districts and the positional information at cell ID and terminal oneself in this measurement report.
3. method as claimed in claim 2 is characterized in that:
The signal strength signal intensity that self belongs to sub-district and other sub-districts is detected at said terminal; When the signal strength signal intensity in other sub-districts surpasses the strength threshold value; Said measurement report is sent to the base station in the terminal, comprises sign and location information of terminals that signal strength signal intensity surpasses the sub-district of threshold value in this measurement report.
4. the method for claim 1; It is characterized in that; After said base station received other cell signal information, the base station judged according to the signal strength signal intensity of other sub-districts, the base station location under other sub-districts, the position at terminal and the cell coverage area of the network planning whether the signal of other sub-districts constitutes interference to this sub-district.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101535901A CN101128011B (en) | 2007-09-19 | 2007-09-19 | A method for automatic cell interference optimization |
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| CN2007101535901A CN101128011B (en) | 2007-09-19 | 2007-09-19 | A method for automatic cell interference optimization |
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| CN101128011B true CN101128011B (en) | 2012-05-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104244335A (en) * | 2013-06-13 | 2014-12-24 | 索尼公司 | Interference coordination method, interference coordination device and measuring device |
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| CN101557654B (en) * | 2008-04-07 | 2013-05-08 | 中兴通讯股份有限公司 | Method and system for network coverage optimization processing |
| CN101729161B (en) * | 2008-11-03 | 2013-08-07 | 中兴通讯股份有限公司 | Measurement processing method and device |
| CN101772062B (en) * | 2008-12-30 | 2012-12-12 | 华为技术有限公司 | Method, device and system for adjusting measurement report threshold of user devices |
| EP2217028B1 (en) * | 2009-02-05 | 2016-04-20 | Mitsubishi Electric R&D Centre Europe B.V. | Method and a device for adjusting the transmission power of signals |
| CN101835176B (en) * | 2009-03-13 | 2013-05-01 | 中国移动通信集团公司 | Configuration controller and method and system for configuring frequency of LTE network home base station |
| CN101925072A (en) * | 2009-06-12 | 2010-12-22 | 大唐移动通信设备有限公司 | Method and equipment for detecting coverage of reference mark channel |
| CN101925073A (en) * | 2009-06-12 | 2010-12-22 | 大唐移动通信设备有限公司 | Coverage detection method and equipment of reference mark channel |
| CN102056217B (en) * | 2009-10-27 | 2016-04-13 | 中兴通讯股份有限公司 | The report method of measurement event and device |
| CN102088780B (en) * | 2009-12-03 | 2013-11-06 | 电信科学技术研究院 | Method and base station for avoiding signal interference in hierarchical network |
| CN102083074A (en) * | 2011-01-19 | 2011-06-01 | 哈尔滨侨航通信设备有限公司 | Design method for realizing channel sharing of adjacent base stations |
| CN102118778B (en) * | 2011-03-30 | 2014-11-12 | 京信通信系统（中国）有限公司 | Method and device for dynamic optimization of wireless communication system, and wireless communication system |
| CN103581957B (en) * | 2012-07-25 | 2016-08-10 | 中国移动通信集团公司 | A kind of interference detection method, equipment and system |
| WO2014019229A1 (en) * | 2012-08-03 | 2014-02-06 | 富士通株式会社 | Base station grouping method, base station, system, terminal grouping method, terminal, machine readable program and storage medium |
| US9357507B2 (en) * | 2012-09-13 | 2016-05-31 | Qualcomm Incorporated | Centralized management for pilot pollution mitigation in small cell networks |
| CN104754631B (en) * | 2013-12-31 | 2019-07-09 | 中兴通讯股份有限公司 | It is a kind of to check the method and system of area interference, network management |
| CN106998559B (en) * | 2016-01-22 | 2020-08-25 | 中国移动通信集团贵州有限公司 | Cell detection method and device |
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| CN101128011A (en) | 2008-02-20 |
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