CN104185189B - LTE system interference positioning method and device - Google Patents
LTE system interference positioning method and device Download PDFInfo
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- CN104185189B CN104185189B CN201310195246.4A CN201310195246A CN104185189B CN 104185189 B CN104185189 B CN 104185189B CN 201310195246 A CN201310195246 A CN 201310195246A CN 104185189 B CN104185189 B CN 104185189B
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Abstract
The present invention discloses a kind of LTE system interference positioning method and device, for positioning LTE system interference, to carry out guidance of arranging net.The interference positioning method includes：Reference Signal Received Power computing system signal based on serving cell and neighboring community and interference plus make an uproar than estimated value；By estimated value and the signal and interference plus make an uproar than actual value be compared, and a comparison result；And when the difference that comparison result is the estimated value and the actual value is more than or equal to predetermined threshold value, determine interference source except the system；When the difference that comparison result is estimated value and actual value is less than predetermined threshold value, determine the interference source within the system.Technical solution using the present invention determines interference within the system or except system, so as to very easily adjust the data throughput for formulating place by adjusting serving cell and the Reference Signal Received Power of adjacent cell, provides a kind of foundation arranged net.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to a kind of LTE system based on drive test data is dry
Disturb localization method and device.
Background technology
Before 3G, cellular communication system major concern cell capacity is to determine substantially due to the data rate of speech,
The cell capacity i.e. community user number that same frequency resource is capable of providing is certain.Into after mobile internet era, number
Tenability according to business is 3G and LTE technology greater concerns, and embody data service capacity is gulping down for single link
Spit the throughput of rate and entire cell.Due to the mobile communication system of rear 3G, many link adaptation techniques are used, such as certainly
It adapts to modulation and retransmits HARQ and multi-subscriber dispatching etc. with coding AMC, mixed self-adapting, give the analysis of throughput associated class problem,
Many dimensions are brought, system engineer needs to pay close attention to more parameters, with greater need for the dynamic behaviour of analysis network.
It is limited by frequency resource, domestic TD-LTE can only take carrys out networking with the mode arranged net frequently, can thus lead
Cause the presence of the interference from co-frequency neighbor cell in TD-LTE system, and interfering can cause throughput to reduce.And operator compares pass
The heart is throughput, it would be desirable to instruct to arrange net according to throughput.
Therefore, system interference can not be determined by existing in the prior art, to according to system interference and the relationship of throughput into
The problem of row guidance is arranged net.
Invention content
The present invention discloses a kind of LTE system interference positioning method and device, for solve it is existing in the prior art can not
System interference is determined, to carry out the problem of guidance is arranged net according to system interference and the relationship of throughput.
To achieve the above object, according to the first aspect of the invention, a kind of LTE system interference positioning method is provided, and is adopted
With following technical solution：
Interference positioning method in LTE system, including：Reference Signal Received Power based on serving cell and neighboring community
Computing system signal with interference plus make an uproar than estimated value；By the estimated value and the signal and interference plus make an uproar than actual value into
Row compares, and obtains a comparison result；And be more than in the difference that the comparison result is the estimated value and the actual value or
When person is equal to predetermined threshold value, determine interference source except the system；It is the estimated value and described true in the comparison result
When the difference of real value is less than the predetermined threshold value, determine the interference source within the system.
Further, after determining the interference source within the system, further include：Build the estimated value and institute
State the first relationship between Reference Signal Received Power；The actual value is obtained from the drive test data of the system and is equipped in advance
Position the second relationship between the throughput set；The reference signal is established according to first relationship with second relationship to connect
The third relationship between power and the throughput is received, the third relationship is used to position the interference source in the system.
Further, the Reference Signal Received Power based on serving cell and neighboring community calculate system signal with
Interference plus make an uproar than estimated value include：The reference signal that the serving cell is obtained from the measurement report of the system receives work(
Rate, the signal power S of the Reference Signal Received Power of the serving cell as the serving cell；According to cellular model to institute
The Reference Signal Received Power for stating neighboring community carries out arrangement processing, the reference of the neighboring community by the arrangement processing
Signal reception power is used to estimate the signal power I of the neighboring communityi；According to the signal power S of the serving cell and institute
State the signal power I of neighboring community iiThe estimated value SINR is calculated by following formula：
Further, the Reference Signal Received Power of the neighboring community by the arrangement processing is for estimating
The signal power Ii of the neighboring community includes：The reference signal for being defined through the neighboring community of the arrangement processing receives
Power is RSRPm；According to the RSRPmThe Ii is calculated by following formula：
Inhibiting factors of the wherein α between different community, i represent neighboring community, and m refers to the neighboring community different from i.
According to another aspect of the present invention, a kind of LTE system interference positioning device is provided, and uses following technical side
Case：
LTE system interferes positioning device, including：First computing module is used for the ginseng based on serving cell and neighboring community
Examine signal reception power calculate system signal with interference plus make an uproar than estimated value；Comparison module, for by the estimated value with
The signal with interference plus make an uproar than actual value be compared, and a comparison result；And determining module, in the ratio
When relatively result is that the difference of the estimated value and the actual value is more than or equal to predetermined threshold value, determine interference source in the system
Except system；When the difference that the comparison result is the estimated value and the actual value is less than the predetermined threshold value, institute is determined
Interference source is stated within the system.
Further, the interference positioning device in LTE system further includes：First structure module, for building the estimation
The first relationship between value and the Reference Signal Received Power；First acquisition module, for the drive test data from the system
Middle the second relationship obtained between the actual value and the default throughput for formulating position；And second structure module, be used for root
The third between the Reference Signal Received Power and the throughput is built according to first relationship and second relationship to close
System, the third relationship are used to position the interference source in the system.
Further, first computing module includes：Second acquisition module, for from the measurement report of the system
The Reference Signal Received Power of the serving cell is obtained, the Reference Signal Received Power of the serving cell is as the service
The signal power S of cell；Processing module is arranged, is used for according to cellular model to the Reference Signal Received Power of the neighboring community
Arrangement processing is carried out, the Reference Signal Received Power of the neighboring community by the arrangement processing is described adjacent for estimating
The signal power Ii of cell；And second computing module, for according to the signal power S of the serving cell with it is described adjacent small
The signal power Ii in area calculates the estimated value SINR by following formula：
Further, the arrangement processing module includes：Definition module, for being defined through described in the arrangement processing
The Reference Signal Received Power of neighboring community is RSRPm；Third computing module, for passing through following formula according to the RSRPm
Calculate the Ii：
Inhibiting factors of the wherein α between different community, i represent neighboring community, and m refers to the neighboring community different from i.
What the present invention mainly studied be Reference Signal Received Power in existing net, signal and interference plus make an uproar than with throughput it
Between relationship, this makes it possible to the Reference Signal Received Power very easily by adjusting serving cell and adjacent cell to refer to adjust
Determine the data throughput in place, and then a kind of foundation arranged net can be provided.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and is constituted part of this application, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 shows the LTE system interference positioning method particular flow sheets described in the embodiment of the present invention；
Fig. 2 indicate the embodiment of the present invention described in Reference Signal Received Power, signal with interference plus make an uproar than with throughput
Relational graph；
Fig. 3 indicate the embodiment of the present invention described in Reference Signal Received Power be (- 95, -85] when throughput with signal with
Interference, which adds to make an uproar, compares change schematic diagram；
Fig. 4 indicates that the LTE system described in the embodiment of the present invention interferes positioning device structure schematic diagram.
Specific implementation mode
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
Fig. 1 shows the LTE system interference positioning method particular flow sheets described in the embodiment of the present invention.
Shown in Figure 1, LTE system interference positioning method includes：
S101:Reference Signal Received Power computing system signal based on serving cell and neighboring community and interference plus ratio of making an uproar
Estimated value；
S103:By the estimated value and the signal and interference plus make an uproar than actual value be compared, and one compare knot
Fruit；
S105:It is more than or equal to predetermined threshold value in the comparison result for the estimated value and the difference of the actual value
When, determine interference source except the system；It is less than for the difference of the estimated value and the actual value in the comparison result
When the predetermined threshold value, determine the interference source within the system.
In the scheme of step S101, the Reference Signal Received Power (Reference based on serving cell and neighboring community
Signal Receiving Power, abbreviation RSRP) it can be obtained from systematic survey report, signal and interference plus ratio of making an uproar
(Signalto Interferenceplus Noise Ratio, abbreviation SINR) is also a test software direct access to the value, main
What is characterized is the signal-to-noise ratio of system, can be theoretically calculated.
In drive test data, the RSRP of main serving cell reflects main serving cell signal power S, but the RSRP of neighboring community
Directly it is not signal power.
Wherein, m refers to the neighboring community different from i, α be different community by the inhibiting factor of RS (spread spectrum of similar CDMA because
Son), depend on PRB number employed in RSRP Measurement Algorithms.So during estimating SINR with RSRP, need first
It will be according to cellular model to RSRPiArrangement handled, treated RSRPiIt can be used for estimating α × ∑i≠mIi, estimation
After going out residual interference and noise, then accurate I can be obtainediEstimated value is estimated it is thus possible to applied in SINR formula
Evaluation
In step s 103, with the SINR actual values and estimated value obtained in being reported from systematic surveyIt is compared,
And by the technical solution of step S105, determine interference source within system or except system.
In the above-mentioned technical proposal of the present embodiment, using throughput as the network of target, the SINR for controlling network is needed
Value, and SINR value is mainly to be determined by serving cell and the RSRP of neighboring community.RSRP and SINR, which is drive test, to be measured
Most important data be not as caused by interfering, be to belong to weak to cover if SINR is relatively low and main serving cell RSRP is relatively low simultaneously
Lid causes；If main serving cell RSRP higher and SINR is relatively low, consideration be cause of failures in system.
, can be according to cellular system model using the technical solution of the present embodiment, positioning has main serving cell interference larger
The cell of contribution, using cellular system model, the transmission power of each adjacent area of structure adjusting had both reached Target cell interference for school building
Purpose, and transmission power adjustment of some adjacent areas will not be made too many, influence network performance.
Preferably, after determining the interference source within the system, further include：Build the estimated value with it is described
The first relationship between Reference Signal Received Power；The actual value is obtained from the drive test data of the system to formulate with default
The second relationship between the throughput of position；The reference signal is established according to first relationship and second relationship to receive
Third relationship between power and the throughput, the third relationship are used to position the interference source in the system.
After determining interference source within system, interference source in system can be further determined.Above-mentioned technical proposal can lead to
Fig. 2 is crossed to illustrate.
Fig. 2 indicate the embodiment of the present invention described in Reference Signal Received Power, signal with interference plus make an uproar than with throughput
Relational graph.
It is shown in Figure 2, the first relationship between RSRP and SINR is initially set up, next is established between SINR and throughput
The second relationship, the third relationship between RSRP and throughput is then established according to the first relationship and the second relationship.
More specifically, the interference that system is calculated according to the RSRP of serving cell and surrounding adjacent cell, further passes through
The interference calculation of RSRP and system goes out the SINR of serving cell.Relationship between SINR and throughput needs the number from real network
It comes out according to statistics, finally establishes the relationship between RSRP and throughput.
The advance of this method is:Using cellular network model, to RSRP the drive tests parameter such as SINR model；
Measured data is verified with model first, verifies to contain in measured data in main serving cell signal and system and do
It disturbs；Then bright to be provided for the solution of interference problem then using used model, locating source, and quantization annoyance level
True guidance instruction；Used cellular model, it is contemplated that the factors such as actual geographical terrain, and local propagation model etc.；
Network signal and interference model can be trained according to measured data and adaptively adjust.
According to above-mentioned technical proposal, large-scale drive test, the sea obtained to drive test are carried out to TD-LTE pilot test nets
Amount data are counted, it is found that TD-LTE is an interference sensory system, under the premise of meeting basic covering, if in full RB
Occupancy under the conditions of, network downstream performance is mainly and interference level strong correlation and the coverage strength of network are without direct related
Property, i.e. Throughput and SINR are substantially without directly related property, and RSRP throughputs in a certain range change such as with SINR
Shown in Fig. 3.
Similar with traditional GSM, TD-SCDMA network indeed according to theoretical simulation and real net measurement, TDL equally may be used
Distributed model to obtain a good S and Ii once obtains one for example, in the 3GPP standardisation process of GSM network
A conclusion：If the signal power of 18 adjacent areas of a cell is ranked up, the phase in a statistical significance can be obtained
Contrast ratio, for example, the signal power I0 and I1 of strongest 2 cells can account for ∑iAdjacent area i signal powers Ii30%, it is remaining
Interference is also according to certain model profile.
Therefore a guiding opinion can be obtained：How each adjacent area transmission power of structure adjusting so that Target cell
SINR enhancings are unlikely to so that the excessive influence estate performance of some adjacent area adjustment to meeting expected numerical value.
RSRP in present invention measurement report is based on cellular system model, estimates SINR；Pass through true SINR
With estimation SINR matching degree, to verify main interference source whether in measurement report.If the SINR and reality that estimate
Border SINR relatively coincide, then it is believed that containing the source of interfering significantly in measurement report.It is comprehensive so as to formulate an Adjusted Option
Adjust adjacent area transmission power so that Target cell SINR is improved to zone of reasonableness, and some adjacent area will not be made to adjust excessive shadow
Ring network performance.Used cellular system model, contains the statistical distribution interfered adjacent area, including under different geographical terrains
Propagation characteristic.It can be trained with magnanimity drive test data, with the local existing net of matching, drive test data is classified as different scenes,
Cellular system model can be modified to adaptive model.It can examine whether adjustment meets target by cellular model, if make
At negative effect.
Fig. 4 indicates that the LTE system described in the embodiment of the present invention interferes positioning device structure schematic diagram.
Shown in Figure 4, LTE system interferes positioning device, including：First computing module 401, for being based on serving cell
With the Reference Signal Received Power of neighboring community calculate system signal with interference plus make an uproar than estimated value；Comparison module 403 is used
In by the estimated value and the signal and interference plus make an uproar than actual value be compared, and a comparison result；And it determines
Module 405, for being more than or equal to predetermined threshold value in the comparison result for the estimated value and the difference of the actual value
When, determine interference source except the system；It is less than for the difference of the estimated value and the actual value in the comparison result
When the predetermined threshold value, determine the interference source within the system.
Further, the interference positioning device in LTE system further includes：First structure module (not shown), is used for structure
Build the first relationship between the estimated value and the Reference Signal Received Power；First acquisition module (not shown), is used for
From the second relationship obtained in the drive test data of the system between the actual value and the default throughput for formulating position；And
Second structure module (not shown), receives for building the reference signal according to first relationship and second relationship
Third relationship between power and the throughput, the third relationship are used to position the interference source in the system.
Further, first computing module 401 includes：Second acquisition module (not shown) is used for from the system
The Reference Signal Received Power of the serving cell is obtained in the measurement report of system, the reference signal of the serving cell receives work(
Signal power S of the rate as the serving cell；Processing module (not shown) is arranged, is used for according to cellular model to the phase
The Reference Signal Received Power of adjacent cell carries out arrangement processing, the reference signal of the neighboring community by the arrangement processing
Receive the signal power Ii that power is used to estimate the neighboring community；And the second computing module (not shown), it is used for basis
The signal power S of the serving cell and signal power Ii of the neighboring community calculates the estimated value by following formula
SINR：
Further, the arrangement processing module (not shown) includes：Definition module, for being defined through the arrangement
The Reference Signal Received Power of the neighboring community of processing is RSRPm；
Third computing module, for calculating the Ii by following formula according to the RSRPm：
Wherein, inhibiting factors of the α between different community, i represent neighboring community, and m refers to the neighboring community different from i.
RSRP in present invention measurement report is based on cellular system model, estimates SINR；Pass through true SINR
With estimation SINR matching degree, to verify main interference source whether in measurement report.If the SINR and reality that estimate
Border SINR relatively coincide, then it is believed that containing the source of interfering significantly in measurement report.It is comprehensive so as to formulate an Adjusted Option
Adjust adjacent area transmission power so that Target cell SINR is improved to zone of reasonableness, and some adjacent area will not be made to adjust excessive shadow
Ring network performance.Used cellular system model, contains the statistical distribution interfered adjacent area, including under different geographical terrains
Propagation characteristic.It can be trained with magnanimity drive test data, with the local existing net of matching, drive test data is classified as different scenes,
Cellular system model can be modified to adaptive model.It can examine whether adjustment meets target by cellular model, if make
At negative effect.The present invention judges the whether true interference source of interference source by the theoretical model and systems approach of complete set,
It is markedly superior to general network optimized approach.
Claims (6)
1. a kind of LTE system interference positioning method, which is characterized in that including：
Reference Signal Received Power computing system signal based on serving cell and neighboring community and interference plus make an uproar than estimated value；
By the estimated value and the signal and interference plus make an uproar than actual value be compared, and a comparison result；
When the difference that the comparison result is the estimated value and the actual value is more than or equal to predetermined threshold value, determine dry
Source is disturbed except the system；It is less than the default threshold in the comparison result for the estimated value and the difference of the actual value
When value, determine the interference source within the system；
Build the first relationship between the estimated value and the Reference Signal Received Power；
From the second relationship obtained in the drive test data of the system between the actual value and the default throughput for formulating position；
It is established between the Reference Signal Received Power and the throughput according to first relationship and second relationship
Third relationship, the third relationship are used to position the interference source in the system.
2. interference positioning method as described in claim 1, which is characterized in that the ginseng based on serving cell and neighboring community
Examine signal reception power calculate system signal with interference plus make an uproar than estimated value include：
The Reference Signal Received Power of the serving cell, the ginseng of the serving cell are obtained from the measurement report of the system
Examine signal power S of the signal reception power as the serving cell；
Arrangement processing is carried out to the Reference Signal Received Power of the neighboring community according to cellular model, is handled by the arrangement
The Reference Signal Received Power of the neighboring community be used to estimate the signal power I of the neighboring communityi；
According to the signal power I of the signal power S of the serving cell and the neighboring community iiDescribed in the calculating of following formula
Estimated value SINR：
3. interference positioning method as claimed in claim 2, which is characterized in that described by the described adjacent of the arrangement processing
The Reference Signal Received Power of cell is for estimating that the signal power Ii of the neighboring community includes：
The Reference Signal Received Power for being defined through the neighboring community of the arrangement processing is RSRPm；
According to the RSRPmThe Ii is calculated by following formula：
Inhibiting factors of the wherein α between different community, i represent neighboring community, and m refers to the neighboring community different from i.
4. a kind of LTE system interferes positioning device, which is characterized in that including：
First computing module, for the Reference Signal Received Power based on serving cell and neighboring community calculate system signal with
Interference plus make an uproar than estimated value；
Comparison module, for by the estimated value and the signal and interference plus make an uproar than actual value be compared, and a ratio
Relatively result；
Determining module, it is default for being more than or equal in the difference that the comparison result is the estimated value and the actual value
When threshold value, determine interference source except the system；In the difference that the comparison result is the estimated value and the actual value
When less than the predetermined threshold value, determine the interference source within the system；
First structure module, for building the first relationship between the estimated value and the Reference Signal Received Power；
First acquisition module formulates handling up for position for obtaining the actual value from the drive test data of the system with default
The second relationship between rate；
Second structure module, for according to first relationship and second relationship build the Reference Signal Received Power with
Third relationship between the throughput, the third relationship are used to position the interference source in the system.
5. interference positioning device as claimed in claim 4, which is characterized in that first computing module includes：
Second acquisition module, the reference signal for obtaining the serving cell from the measurement report of the system receive work(
Rate, the signal power S of the Reference Signal Received Power of the serving cell as the serving cell；
Processing module is arranged, for being carried out at arrangement to the Reference Signal Received Power of the neighboring community according to cellular model
The Reference Signal Received Power of reason, the neighboring community by the arrangement processing is used to estimate the signal of the neighboring community
Power Ii；
Second computing module, for logical according to the signal power S of the serving cell and the signal power Ii of the neighboring community
It crosses following formula and calculates the estimated value SINR：
6. interference positioning device as claimed in claim 5, which is characterized in that the arrangement processing module includes：
Definition module is RSRPm for being defined through the Reference Signal Received Power of the neighboring community of the arrangement processing；
Third computing module, for calculating the Ii by following formula according to the RSRPm：
Inhibiting factors of the wherein α between different community, i represent neighboring community, and m refers to the neighboring community different from i.
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| CN107819491B (en) * | 2016-09-12 | 2021-07-02 | 中兴通讯股份有限公司 | Method and device for positioning interference source |
| CN108243447B (en) * | 2016-12-23 | 2020-11-24 | 中国移动通信集团设计院有限公司 | External interference positioning method and device |
| CN108391279A (en) * | 2018-02-08 | 2018-08-10 | 南瑞集团有限公司 | A kind of outer interference source failure method for tracking and positioning of LTE electric power wireless private network net |
| CN109041085A (en) * | 2018-09-21 | 2018-12-18 | 广州珂琅特通信科技有限公司 | A kind of LTE wireless network interference elimination method |
| CN112969193B (en) * | 2019-12-13 | 2022-08-12 | 中国移动通信集团天津有限公司 | Interference determination method, device and equipment for wireless network |
| CN112512077B (en) * | 2020-12-15 | 2023-08-11 | 中国联合网络通信集团有限公司 | Uplink rate evaluation method and device |
| CN114158086B (en) * | 2021-12-16 | 2023-12-22 | 中国联合网络通信集团有限公司 | Cell interference evaluation method, communication device, computing equipment and storage medium |
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| CN102300320A (en) * | 2010-06-22 | 2011-12-28 | 上海贝尔股份有限公司 | Inter-cell interference coordination method and device |
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| CN101277542A (en) * | 2008-03-28 | 2008-10-01 | 北京邮电大学 | Method and system for managing centralized dynamic spectrum among wireless networks |
| CN102300320A (en) * | 2010-06-22 | 2011-12-28 | 上海贝尔股份有限公司 | Inter-cell interference coordination method and device |
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