CN106851570A - Based on the method and device that MR is positioned to mobile terminal - Google Patents
Based on the method and device that MR is positioned to mobile terminal Download PDFInfo
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- CN106851570A CN106851570A CN201710040485.0A CN201710040485A CN106851570A CN 106851570 A CN106851570 A CN 106851570A CN 201710040485 A CN201710040485 A CN 201710040485A CN 106851570 A CN106851570 A CN 106851570A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
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- H04B17/20—Monitoring; Testing of receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention provides a kind of method and device positioned to mobile terminal based on MR.The method includes：Obtained from MR and be directed to the signal reception power of serving BS first and the secondary signal receiving power for neighbor base station, combined standard propagation model, calculate received signal strength poor, so as to eliminate a large amount of uncertain parameters in propagation model, obtain mobile terminal to distance and the mobile terminal of serving BS to the ratio of distances constant of adjacent base station be definite value, mobile terminal is positioned using Apollo Nice circle finally, so as to, propagation model and multipath effect is avoided to calculate the inaccurate problem of distance between mobile terminal and base station, and, eliminate influence of the coefficient of complexity in propagation model to result of calculation, reduce the influence of a large amount of environmental factors, further improve setting accuracy.
Description
Technical field
The application is related to communication technical field, more particularly to one kind to be positioned to mobile terminal based on MR (measurement report)
Method and device.
Background technology
In communication technical field, it is current particularly important technical work that mobile terminal be accurately positioned, and is telecommunications
Operator understands mobile terminal user's situation in time and own operations situation provides foundation, especially can be by mobile whole
The mode of positioning is held to find the weak overlay area of network signal, and then the quick weak covering problem for effectively solving to exist in time.
Current most general method is that the path loss model according to wireless signal calculates mobile terminal to each base station
Distance, is then positioned using triangle method for positioning mass center to mobile terminal, wherein, the path loss model of wireless signal
Formula below can be attributed to：
L=k1+k2logf-k3loghb-k4loghm+10Nlogd+X
Wherein, L is path loss, and f is signal frequency, hbIt is base station antenna height, hmIt is the antenna height of mobile terminal, d
It is propagation distance, k1-k4, N, X be constant coefficient, according to the different and different of signal communication environments, can be according to pushing away by above-mentioned formula
Calculate d.
However, because non line of sight (Non Line of Sight, NLOS) error of radio signal propagation is a big non-negative
Value, therefore, the distance extrapolated is much larger than actual distance, therefore mobile terminal is determined using triangle method for positioning mass center
During position, the position of mobile terminal is located at the overlapping region of each circle made as radius apart from d (such as the point of A, B, C tri- institute in Fig. 1
Enclose region).To three points minimum apart from sum of point A, B, C in the region, that is, cause the point of F (x, y)=min F (x, y)
The as position of mobile terminal, wherein：F (x, y)=(x-xA)2+(y-yA)2+(x-xB)2+(y-yB)2+(x-xC)2+(y-yC)2。
In above-mentioned algorithm, the determination principle of intersection point A, B, C is：Any two circles of selection (base station BS 1 and base in such as Fig. 1
Stand BS2), calculate two round intersection points (i.e. point A and F)；Selected from two intersection points from the 3rd circle (base station BS 3) recently and position
In the point (i.e. point A) in the 3rd circle as overlapping region a boundary point；If two intersection points are all located in the 3rd circle,
Then two points are all selected, if two intersection points are not in the 3rd circle, the two points are not selected.
But in view of some special circumstances：Because the reason for measurement error, two circles may not have intersection point, as shown in Fig. 2
(this situation without intersection point is because BS2 measurements are obtained not to have intersection point between circle where circle where base station BS 1 and base station BS 2
RSS values it is caused containing larger NLOS (non line of sight) error etc.).In order to process such case, by circle where base station BS 2
Radius r2 is modified to r2 '=d12+ r1, in formula, d12Represent the distance between base station BS 1 and base station BS 2.It is revised with half
The circle of footpath r2 ' meets at a bit (i.e. point D) with circle where base station BS 1, so, according to the original that coverage area boundaries point is determined above
Then, two points of A, B meet condition in 5 points, therefore, F (x, y) is modified to：F (x, y)=(x-xA)2+(y-yA)2+(x-
xB)2+(y-yB)2, the position of MS is still determined by F (x, y)=min F (x, y).
In addition, shown in reference picture 3, there is no intersection point between circle where the place of base station BS 1 circle and base station BS 3, it is this without friendship
Containing larger measurement error in the RSS that the situation of point is obtained mainly due to two base station measurements.It is this without friendship in order to process
The situation of point, base station BS 1 will be processed with the midpoint (i.e. A points) of the line of base station BS 3 as two round intersection points.According to being determined above
The principle of coverage area boundaries point, point A is the position of mobile terminal.
Above for mobile terminal measures 3 localization methods of base station signal, if mobile terminal is measurable to N number of base station
Path loss, then can obtain mobile terminal to the estimate of the distance of N number of base station, that is, determine N number of distance circle (i.e. with mobile terminal
The circle that distance to base station is done as radius).3 are arbitrarily selected, can be had altogetherCombination is planted, for every kind of group
Conjunction moves the location estimation of terminal using GLE algorithms, then can obtain K estimate, is designated as { X1, X2…XK, calculate afterwards
The barycenter of the K position estimation valueIfIn the fan ring determined by CI and TA, thenIt is the position of the final mobile terminal for determining.IfIt is not located in the fan ring determined by CI and TA, thenWith Shan Huan centers
Line midpoint be the final mobile terminal for determining position.
Although mobile terminal to serving BS and the distance of periphery neighbor base station, Ran Houli can be calculated by propagation model
The position of mobile terminal is determined with triangle centroid localization algorithm；However, it is indoors that the program cannot be distinguished by mobile terminal
Or it is outdoor, if using identical propagation model, because indoor moving terminal loss is big, by propagation model be calculated away from
From big, with actual conditions contradiction.In addition, geomorphological environment is complicated in communication process, propagation model parameter is more, to propagation loss result
Influence factor it is many, so as to cause the mobile terminal being calculated inaccurate with the distance between base station, and then, cause to movement
It is inaccurate that terminal carries out positioning.
The content of the invention
The embodiment of the present application provides a kind of method and device positioned to mobile terminal based on measurement report MR, at least
Solve the problems, such as present in prior art to mobile terminal carry out positioning it is inaccurate.
According to one embodiment of the invention, there is provided a kind of method positioned to mobile terminal based on MR, including：Root
The first receiving power during the reference signal of mobile terminal reception serving BS transmission to be positioned is determined according to measurement report MR, and
When determining that mobile terminal to be positioned receives the reference signal of the three adjacent base stations transmission adjacent with the serving BS second connects
Receive power；According to first receiving power and three second receiving powers, determine that the mobile terminal to be positioned is arrived
The distance of the serving BS respectively with the distance of each adjacent base station in the mobile terminal to be positioned to three adjacent base stations
Ratio；Using Apollo Nice circle theorem, according to three ratio for determining and position and the institute of the serving BS
Three positions of adjacent base station are stated, three A Shi circles are determined；When three A Shi circles intersect at a point, point of intersection correspondence is determined
Position be the mobile terminal to be positioned position, or, when three A Shi circle intersect at 3 when, determine three friendship
The corresponding position of barycenter of the constituted triangle of point is the position of the mobile terminal to be positioned.
According to a further embodiment of the invention, there is provided a kind of device positioned to mobile terminal based on MR, including：
Receiving power determining unit, for determining that mobile terminal to be positioned receives the reference letter that serving BS sends according to measurement report MR
Number when the first receiving power, and determine that mobile terminal to be positioned receives the three adjacent base stations hair adjacent with the serving BS
The second receiving power during the reference signal sent；Ratio determining unit, for according to first receiving power and described three
Individual second receiving power, determine the mobile terminal to be positioned to the serving BS distance respectively with the movement to be positioned
Ratio of the terminal to the distance of each adjacent base station in three adjacent base stations；A Shi justifies determining unit, for utilizing Apollo Buddhist nun
This circle theorem, according to three ratio for determining and the position and the position of three adjacent base stations of the serving BS,
Determine three A Shi circles；Positioning unit, for when three A Shi circles intersect at a point, determining the corresponding position of point of intersection
It is the position of the mobile terminal to be positioned, or, for when three A Shi circles intersect at 3, determining three intersection points
The corresponding position of barycenter of the triangle for being constituted is the position of the mobile terminal to be positioned.
Above-mentioned at least one technical scheme that the embodiment of the present application is used can reach one kind in following beneficial effect or
It is various：By above technical scheme, obtained for the signal reception power of serving BS first and for neighbor base station from MR
Secondary signal receiving power, combined standard propagation model, calculating received signal strength is poor, so that in eliminating propagation model largely not
The parameter of determination, obtain mobile terminal to distance and the mobile terminal of serving BS to the ratio of distances constant of adjacent base station be definite value, most
Mobile terminal is positioned using Apollo Nice circle eventually, so that, it is to avoid propagation model and multipath effect calculate mobile terminal
The inaccurate problem of distance between base station, and, eliminate influence of the complicated coefficient in propagation model to result of calculation, only with away from
From relevant with the coefficient of base station height correlation, thus, result of calculation reduces the influence of a large amount of environmental factors, improves registration
Degree.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the present application, constitutes the part of the application, this Shen
Schematic description and description please does not constitute the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 is one of triangle center coordination principle schematic involved in the prior art；
Fig. 2 is the two of triangle center coordination principle schematic involved in the prior art；
Fig. 3 is the three of triangle center coordination principle schematic involved in the prior art；
The step of Fig. 4 is a kind of mobile terminal locating method provided in an embodiment of the present invention schematic diagram；
Fig. 5 (a) is that MR obtains principle schematic；
Fig. 5 (b) is the principle schematic of the A Shi circle theorems shown in the embodiment of the present invention；
Fig. 6 is that the three A Shi circles shown in the embodiment of the present invention meet at the principle schematic of a bit；
Fig. 7 is that three A Shi shown in the embodiment of the present invention justify the principle schematic for meeting at 3 points；
Fig. 8 is a kind of structural representation of mobile terminal location device provided in an embodiment of the present invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the application clearer, below in conjunction with the application specific embodiment and
Corresponding accompanying drawing is clearly and completely described to technical scheme.Obviously, described embodiment is only the application one
Section Example, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, belong to the scope of the application protection.
Below in conjunction with accompanying drawing, the technical scheme that each embodiment of the application is provided is described in detail.
Embodiment 1
As shown in figure 4, the step of being a kind of mobile terminal locating method provided in an embodiment of the present invention schematic diagram, the method
It is to be realized based on measurement report MR, referring in particular to following steps：
Step 11：The first during reference signal of mobile terminal reception serving BS to be positioned is determined according to measurement report MR
Receiving power, and when determining that mobile terminal to be positioned receives the reference signal of three adjacent base stations adjacent with the serving BS
The second receiving power.
According to one embodiment, the measurement data information that measurement report MR is reported for the network equipment, shown in reference picture 5 (a)
MR obtain principle schematic, the network equipment (eNodeB or UE) periodically measures the collection of data, and by periodically
The MR that the mode of setting or event triggering will get is uploaded to wireless access network Element management system OMC-R, afterwards, OMC-R
MR statistical informations are periodically generated, and NMS NMS, NMS are reported according to MR statistical informations by northbound interface
Carry out volume of data analysis.Targeting scheme proposed by the invention is to be construed as being carried out in NMS, by data analysis
A series of " position-network information " corresponding datas can be generated, can be used to be accurately positioned network problem point position, and then carry out
The work such as network planning optimization.Thus, the executive agent of the localization method can regard NMS as or be integrated in the present invention
A kind of positioner in NMS.
Wherein, MR is directed to the receiving power of serving BS and the receiving power of adjacent base station comprising mobile terminal UE, such as
MR.LteScRSRP represents that UE receives the receiving power of the reference signal of serving BS, is the master for reflecting serving BS coverage condition
Want index；MR.LteNcRSRP represents the defined neighboring BS relationship and undefined neighboring BS relationship received under serving BS residing for UE
Adjacent base station reference signal receiving power.Additionally, other information can also be included in MR, such as base station signal quality,
MR.RxTxTimeDiff, wherein, MR.RxTxTimeDiff is the UE transmitting-receiving time differences, can be converted to UE distance services base station
Approximate distance.
Thus, it is determined that after a mobile terminal to be positioned, can determine that mobile terminal to be positioned receives service base from MR
The first receiving power during the reference signal stood, and determine that mobile terminal to be positioned receives three adjacent with the serving BS
Second receiving power during the reference signal of individual adjacent base station.
By empirical analysis, controlled within 20% in the difference in height of serving BS and adjacent base station, it is ensured that follow-up to miss
Difference is no more than 0.7%；If serving BS and adjacent base station are highly identical, almost without error；Thus, in order to ensure the essence of positioning
Exactness, when adjacent base station is chosen, can determine some adjacent base stations adjacent with serving BS according to MR；Choose and meet default constraint bar
Three adjacent base stations of part；Determine that mobile terminal to be positioned receives the adjacent base of meet default constraints three in Preset Time
Second receiving power of each adjacent base station in standing.Wherein, the default constraints of three adjacent base stations satisfactions is：The height of adjacent base station
Degree sorts successively according to order from high to low, and sequence is closest with the height of serving BS positioned at the adjacent base station of front three.And
The signal intensity of these three adjacent base stations is higher.Therefore, height close to the adjacent base station of serving BS is chosen as far as possible, by adjacent base station
Difference in height is to be calculated in the range of 20%.
Step 12：According to the first signal reception power and three secondary signal receiving powers, determine to be positioned mobile whole
Hold the distance of serving BS respectively with the ratio of the distance of each adjacent base station in mobile terminal to be positioned to three adjacent base stations.
Alternatively, the step 12 can specifically perform and be：
The first step, calculate corresponding first receiving power of serving BS respectively it is corresponding with three adjacent base stations each second connect
Receive the difference of power；
For example, for mobile terminal to be positioned, can be obtained from MR reports MR.LteScRSRP,
MR.LteNcRSRP1, MR.LteNcRSRP2, MR.LteNcRSRP3, MR.RxTxTimeDiff, therefore, it is very easy to be serviced
In base station and three adjacent base stations between each adjacent base station receiving power difference：For example, the first receiving power of serving BS and neighbour
Difference between second receiving power of base station 1：Δ RSRP1=MR.LteScRSRP-MR.LteNcRSRP1, serving BS
Difference between first receiving power and the second receiving power of adjacent base station 2：Δ RSRP2=MR.LteScRSRP-
MR.LteNcRSRP2, the difference between the first receiving power of serving BS and the second receiving power of adjacent base station 3：ΔRSRP3
=MR.LteScRSRP-MR.LteNcRSRP3.
Second step, according to three differences and standard propagation model SPM, determines mobile terminal to be positioned to serving BS
Distance respectively with the ratio of the distance of each adjacent base station in mobile terminal to be positioned to three adjacent base stations.
In fact, Mobile Communications Propagation environment is complicated more than free space, and propagation loss is also difficult to be stated with theory analysis, because
This based on substantial amounts of test data, must sum up the model of description Mobile Communications Propagation loss.SPM models are in TD-
Supported using more extensive Planning Tool in LTE wireless network plannings
A kind of standard macrocellular model.The expression formula of SPM models is：PR=PTX-PL, wherein,
Wherein, PR is the signal intensity or receiving power that UE receives certain base station, and its unit is dBm；PTX is the transmission of base station
Performance number, unit is dBm；PL is propagation path loss, and unit is dB；K1It is attenuation constant；K2It is the lg related to propagation distance
The modifying factor of (d)；K3It is the modifying factor of the lg (Heff) related to transmitter antenna height；K4It is the amendment of Diffraction Calculation
The factor, the diffraction calculated using the equivalent tooth shape diffraction method of Epstein Peterson, Deygout or Bullington is damaged
Consumption；K5It is the modifying factor of lg (Heff) * lg (d)；K6It is the effective antenna height h of mobile terminalmModifying factor；D be base station and
The distance between mobile terminal；Heff is the effective depth of the transmitter antenna of base station；Diff_Loss is to intercept spreading out on path
Penetrate the loss for causing；hmIt is effective antenna height of mobile terminal；Clutter_offset is atural object attenuation correction value, is landforms
Average weighted loss.
In fact, above-mentioned parameters can be according to local wireless environment (it is also contemplated that geomorphological environment, for example：Mountain area, basin
The geographical environments such as ground, Plain), propagation model calibration is carried out, obtain under different scenes (scene such as dense urban, general city)
Propagation model coefficient is, it is necessary to illustrate, the propagation model parameter in following table is illustrative only, and actual numerical value is not because
It is different with landforms different scenes, such as：K6, the parameter such as Clutter_offset differ and be set to 0, refer to shown in table 1 below：
Table 1
, it is necessary to calculate the covering radius d of base station jurisdiction district in existing standard propagation model formation, i.e.,：
Wherein, formula (3) represents the Y power that d is equal to 10, and the value of Y is
Many parameters are relevant from different communication environments, and base station to the distance i.e. base station of mobile terminal is determined according to the formula
Covering radius formula, and in the calculating process, diffraction loss, the geomorphological features factor with wireless environment, portable antenna are high
Many uncertain factors such as degree are relevant, influence the accuracy for calculating.
And the present invention does not use the above method in view of the similitude of communication environments of the UE to serving BS and to adjacent base station
Distance is directly calculated, but using serving BS and the computational methods of the difference DELTA RSRP of adjacent base station receiving power, is substituted into and is propagated
Model formation, wherein, by taking serving BS Cell0 and adjacent base station Cell1 as an example, can obtain：
The Δ RSRP is that corresponding first signal reception powers of serving BS Cell0 are corresponding with current adjacent base station Cell1
Secondary signal receiving power difference；ΔKCell1It is the attenuation constant in the SPM coefficients of serving BS Cell0 and current adjacent base
The difference of the attenuation constant stood in the SPM coefficients of Cell1；K3 is the transmitting antenna of serving BS Cell0 and current adjacent base station Cell1
The height correction factor；K5 is the serving BS Cell0 and the modifying factor of the antenna height logarithm value of current adjacent base station Cell1
Son；The Heff0 is the corresponding antenna effective heights of the serving BS Cell0；The Heff1 is current adjacent base station Cell1
Corresponding antenna effective height；The d0 is distance of the mobile terminal to be positioned to the serving BS Cell0；It is described
dTOAIt is the displacement described undetermined determined with the receiving and transmitting signal time difference of the serving BS Cell0 according to mobile terminal to be positioned
Move terminal to the about equidistant of the serving BS Cell0；The d1 is the mobile terminal to be positioned to current adjacent base station
The distance of Cell1；D0/d1 is definite value, i.e. distance and mobile terminal to adjacent base station of the mobile terminal to serving BS Cell0
The ratio of distances constant of Cell1 is definite value.
Further, the formula can be reduced to：
Knowable to from formula, d0 be UE to the distance of serving BS, d0 can be calculated according to MR.RxTxTimeDiff from MR
Approximation dTOA, then, above formula (5) can be further simplified as：
Can be obtained from above-mentioned formula, eliminate the uncertain factors such as the landforms relevant with environment by this way, such as K4,
The parameters such as Diff_Loss, Clutter_offset, and the K6 coefficient highly relevant with mobile terminal antenna influence.Further
With reference to base station database, base station transmitting power, base station antenna height, Base Transmitter frequency are obtained from database, in formula：Δ
PTX=PTX1-PTX2 is given value, generally (base station transmitting power is identical) Δ PTX=0, specifically can be according to actual value
Calculate；ΔKCell1It is given value, if the serving BS is identical with the frequency range of adjacent base station, Δ KCell1=0, if frequency range is different,
Decay that can be in the SPM coefficients according to the attenuation constant in the SPM coefficients of serving BS Cell0 with current adjacent base station Cell1
Constant calculations are obtained；K3*lg (Heff0/Heff1) is given value, be able to can specifically obtain servicing base from base station database
The height ratio stood with adjacent base station.If serving BS antenna height is more or less the same with adjacent base station antenna height, lg (Heff0/
Heff1 it is) that (if both are highly identical, this value is for 0) for small variable value；If UE is reported to the actual range of serving BS with MR
To distance be more or less the same, then lg (d0/dTOA) it is small variable value, so, K5*lg (Heff0/Heff1) * lg (d0/dTOA)
It is small variable value, can be ignored.
Therefore, it can further simplify above-mentioned formula (6), obtain：
And then, can derive：
And then, mobile terminal can be derived by serving BS Cell0 apart from d0 and movement by above-mentioned formula (9)
Terminal to adjacent base station Celln the ratio apart from dn, with reference to formula below (1), wherein, n can take the integers such as 1,2,3；
Wherein, formula (1) represents the X power that d0/dn is equal to 10, and the value of X is
The Δ PTX is the difference of the transmit power of the transmit power and current adjacent base station n of serving BS；The Δ RSRP is
The difference of corresponding first signal reception power of serving BS secondary signal receiving power corresponding with current adjacent base station n；
The Δ KCellnThe decay in SPM coefficients for the attenuation constant in the SPM coefficients of the serving BS with current adjacent base station n is normal
The difference of number；The K3 is the height of transmitting antenna modifying factor of the serving BS and current adjacent base station n；The K5 is the clothes
The modifying factor of the antenna height logarithm value of business base station and current adjacent base station n；The Heff0 is the corresponding day of the serving BS
Line effective depth；The Heffn is the corresponding antenna effective heights of current adjacent base station n；The d0 is described to be positioned mobile whole
Hold the distance of the serving BS；The dTOAIt is according to mobile terminal to be positioned base station corresponding with the serving BS
The mobile terminal described to be positioned that the receiving and transmitting signal time difference determines is to the about equidistant of the serving BS；The dn is treated for described
Distance of the positioning mobile terminal to current adjacent base station n；D0/dn is definite value, i.e. distance and movement of the mobile terminal to serving BS
Terminal to adjacent base station n ratio of distances constant be definite value.
Herein, it is necessary to be analyzed to the error of d0/dn, the explanation by taking d0/d1 as an example：
Wherein, in formula (8), d0/d1 be equal to 10 Z power multiplied by withThe value of Z is
RepresentT power equal to 10, the value of T isIt is right belowFurther analysis：In order to ensure positioning of the present invention
Accuracy, choose adjacent base station cell when, as far as possible choose height close to serving BS adjacent base station, by adjacent base station highly
Differ from and calculated in the range of 20%, Heff0/Heff1 ∈ [0.83,1.2] can be obtained, | lg (Heff0/Heff1) | ∈ [0,0.08).
According to dTOAWith the error of d0 within 50%, i.e. 1/1.5≤d0/dTOA≤ 1.5 are calculated, and can be obtained | lg (d0/dTOA)|∈
[0,0.176].Assuming that K2=41.89 in propagation model parameter, K5=-6.55, Heff1=35 (general base station average height),
Can be calculated：So the present invention serving BS and adjacent base station difference in height control 20% with
It is interior, can calculate d0/d1 error be no more than 0.7%；If serving BS and adjacent base station are highly identical, d0/d1 does not have error.
Thus, d0/dn also meets above-mentioned condition.
Therefore, it can calculate mobile terminal UE to be positioned respectively according to the method described above to serving BS apart from d0, point
Not with mobile terminal UE to be positioned to adjacent base station 1, the ratio apart from d1, d2, d3 of the adjacent base station 3 of adjacent base station 2, i.e. adjacent base station 1 pair
The ratio answered：D0/d1, the corresponding ratio of adjacent base station 2：D0/d2, the corresponding ratio of adjacent base station 3：d0/d3.
Step 13：Using Apollo Nice circle theorem, according to three ratios for determining and the position and three of serving BS
The position of individual adjacent base station, determines three A Shi circles.
First, A Shi circle theorems are introduced, its full name is Apollo Nice circle theorem, is specifically described as：Reference picture 5 (b) institute
Show, the ratio of distances constant of a moving point P to two fixed points F1, F2 is equal to be determined than m: n, then the track of P points is with fixed interior than m: n minute and outer minute
Two lines of branch of alignment section AB are the circle of diameter.The circle is referred to as Apollo Nice circle, abbreviation A Shi circles；To two fixed points
The ratio of distances constant of F1, F2 is definite value, wherein, fixed two tracks than for k and 1/k (k ≠ 1) (circle with C ' as the center of circle and with C are
The circle in the center of circle) close main section F1F2 perpendicular bisector it is symmetrical.
Specifically, when the step 13 is performed, each ratio for determining can be directed to：To determine the serving BS of the ratio
The position of position and adjacent base station as two fixed point, using the ratio as Apollo Nice circle theorem in distance ratio, it is determined that
The corresponding A Shi circles of the ratio.
For example, shown in reference picture 6, serving BS Cell0 and adjacent base station Cell1 is two fixed points, ratio d0/d1 is
Distance ratio, obtains the A Shi circles with O1 as the center of circle；Similarly, serving BS Cell0 and adjacent base station Cell2 is two fixed points, than
Value d0/d2 is distance ratio, obtains the A Shi circles with O2 as the center of circle；Serving BS Cell0 and adjacent base station Cell3 is two fixed
Point, ratio d0/d3 is distance ratio, obtains the A Shi circles with O3 as the center of circle.
Step 14：When three A Shi circles intersect at a point, determine that the corresponding position of point of intersection is mobile terminal to be positioned
Position, or, when three A Shi circle intersects at 3, determine the corresponding position of barycenter of the triangle that three intersection points are constituted
It is set to the position of mobile terminal to be positioned.
Generally, three A Shi circle intersecting areas are the rough location region of terminal user, three Apollo Nice
Circle intersecting area is divided into point, triangle, non-intersect three kinds of situations, if it is point (below figure 6) to intersect, this point is mobile terminal
Position；If it is 3 points of triangles for surrounding (below figure 7) to intersect, according to existing triangle method for positioning mass center, then triangle
Barycenter for mobile terminal position；If non-intersect (such as prior figures 2, Fig. 3 situations), more adjacent base stations can be selected with service
Base station builds Apollo Nice circle, finds intersecting situation, obtains the exact position of mobile terminal.
Further, in the present invention, the Reference Signal Received Power RSRP according to mobile terminal reporting, low to receiving power
In preset value or the poor situation of communication quality is detected, mobile terminal can be determined using localization method of the invention
Position, and then accurate weak covering cavity can be obtained, such as RSRP cells -110dBm collects and collects all these RSRP values
With terminal location point, in order to finding and solving weak covering problem in time.
By above technical scheme, (connect according to the signal intensity that mobile terminal receives serving BS and adjacent base station
Receive power), three adjacent base stations are selected, using MR reports, wireless signal propagation model, base station information database, derive movement
Terminal to serving BS distance respectively with mobile terminal to three distance ratios of adjacent base station, finally give mobile terminal to service
The distance ratio of base station and adjacent base station is definite value.Afterwards, believed with the position of adjacent base station using gained distance ratio and serving BS
Breath, builds three Apollo Nice circles, and each Apollo Nice circle as meets serving BS and adjacent base station receives corresponding letter
The position relationship of number intensity, three Apollo Nice circle intersecting areas can be identified as the rough location of terminal user.Further, root
Justify intersecting area according to Apollo Nice, depending on three intersecting situations of Apollo Nice circle, add triangle method for positioning mass center, can be true
Determine the elaborate position of terminal user.It can be seen that, the present invention proposes Apollo Nice circle mobile terminal locating method, it is to avoid propagation model
And multipath effect calculates the inaccurate problem of distance between mobile terminal and base station, extra means measuring and calculating terminal user is also avoided the need for
To different base station time difference be converted to terminal user to different base station range difference, not only increase cost, while there is also compared with
The problem of big error；The present invention makes full use of mobile terminal to the approximation of peripheral base station environmental characteristics, strong by receiving signal
Degree is poor, eliminates influence of the coefficient of complexity in propagation model to result of calculation, only has with the coefficient of distance and base station height correlation
Close, thus, result of calculation reduces the shadow of a large amount of environmental factors (such as landforms, building, mobile portable antennas height, diffraction factor)
Ring, substantially increase counting accuracy.Without the need for increasing extra means, it is only necessary to the data of MR and base station database and work as
The revised propagation model in ground, reduces mobile terminal location cost, improves mobile terminal location precision.
Embodiment two
Belong to same inventive concept with above-described embodiment one, mobile terminal is carried out based on MR present invention also offers one kind
The device of positioning.
As shown in figure 8, being a kind of structural representation of the device positioned to mobile terminal based on MR for providing of the invention
Figure, the device mainly includes following functions unit：
Receiving power determining unit 21, for determining that mobile terminal to be positioned is received in Preset Time according to measurement report MR
The first signal reception power during the reference signal of serving BS, and receive three adjacent base stations adjacent with the serving BS
Reference signal when secondary signal receiving power；
Ratio determining unit 22, for receiving work(according to first signal reception power and three secondary signals
Rate, determine the mobile terminal to be positioned to the serving BS distance respectively with the mobile terminal to be positioned to described three
The ratio of the distance of each adjacent base station in individual adjacent base station；
A Shi justifies determining unit 23, for using Apollo Nice circle theorem, according to three ratio for determining and
The position of the serving BS and the position of three adjacent base stations, determine three A Shi circles；
Positioning unit 24, for when three A Shi circles intersect at a point, determining that the corresponding position of point of intersection is institute
State the position of mobile terminal to be positioned；And, when three A Shi circles intersect at 3, determine what three intersection points were constituted
The corresponding position of barycenter of triangle is the position of the mobile terminal to be positioned.
Alternatively, the receiving power determining unit 21 is determining mobile terminal to be positioned default according to measurement report MR
When time receives the secondary signal receiving power of three adjacent base stations adjacent with the serving BS, specifically for：It is true according to MR
The fixed some adjacent base stations adjacent with the serving BS；Choose three adjacent base stations for meeting default constraints；Determine to be positioned
The secondary signal of mobile terminal each adjacent base station in Preset Time receives three adjacent base stations for meeting default constraints
Receiving power.
Alternatively, the ratio determining unit 22, specifically for：Corresponding first signal of the serving BS is calculated to receive
The difference of power each secondary signal receiving power corresponding with three adjacent base stations respectively；According to three differences and
Standard propagation model SPM, determine the mobile terminal to be positioned to the serving BS distance respectively with the displacement undetermined
Ratio of the dynamic terminal to the distance of each adjacent base station in three adjacent base stations.
Alternatively, the ratio determining unit 22 determines institute according to three differences and standard propagation model SPM
State mobile terminal to be positioned to the serving BS distance respectively with the mobile terminal to be positioned to three adjacent base stations
In each adjacent base station distance ratio when, specifically for：Below equation is determined according to standard propagation model SPM：
Wherein, formula (1) represents the X power that d0/dn is equal to 10, and the value of X is
The Δ PTX is the difference of the transmit power of the transmit power and current adjacent base station n of serving BS；The Δ RSRP is described
The difference of corresponding first signal reception power of serving BS secondary signal receiving power corresponding with current adjacent base station n；It is described
ΔKCellnThe attenuation constant in SPM coefficients for the attenuation constant in the SPM coefficients of the serving BS with current adjacent base station n it
Difference；The K3 is the height of transmitting antenna modifying factor of the serving BS and current adjacent base station n；The K5 is the service base
The modifying factor stood with the antenna height logarithm value of current adjacent base station n；The Heff0 has for the corresponding antenna of the serving BS
Effect height；The Heffn is the corresponding antenna effective heights of current adjacent base station n；The d0 is arrived for the mobile terminal to be positioned
The distance of the serving BS；The dTOAIt is the transmitting-receiving according to mobile terminal to be positioned base station corresponding with the serving BS
The mobile terminal described to be positioned that signal time difference determines is to the about equidistant of the serving BS；The dn is described to be positioned
Distance of the mobile terminal to current adjacent base station n；The difference is substituted into the formula (1), the movement to be positioned is calculated
Terminal to the serving BS distance respectively with each adjacent base station in the mobile terminal to be positioned to three adjacent base stations
Distance ratio.
Alternatively, the A Shi circles determining unit 23, specifically for：For each ratio for determining：To determine the ratio
The position of the serving BS and the position of the adjacent base station of value as two fixed points, using the ratio as Apollo Nice
Distance ratio in circle theorem, determines the corresponding A Shi circles of the ratio.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can be using the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.And, the present invention can be used and wherein include the computer of computer usable program code at one or more
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) is produced
The form of product.
Embodiments herein is the foregoing is only, the application is not limited to.For those skilled in the art
For, the application can have various modifications and variations.It is all any modifications made within spirit herein and principle, equivalent
Replace, improve etc., within the scope of should be included in claims hereof.
Claims (10)
1. a kind of method positioned to mobile terminal based on MR, it is characterised in that including：
The first reception work(during the reference signal of mobile terminal reception serving BS transmission to be positioned is determined according to measurement report MR
Rate, and when determining that mobile terminal to be positioned receives the reference signal that three adjacent base stations adjacent with the serving BS send
Second receiving power；
According to first receiving power and three second receiving powers, determine the mobile terminal to be positioned described in
The distance of serving BS respectively with the ratio of the distance of each adjacent base station in the mobile terminal to be positioned to three adjacent base stations
Value；
Using Apollo Nice circle theorem, according to three ratio for determining and the position and described three of the serving BS
The position of individual adjacent base station, determines three A Shi circles；
When three A Shi circles intersect at a point, the position that the corresponding position of point of intersection is the mobile terminal to be positioned is determined
Put, or, when three A Shi circles intersect at 3, determine the corresponding position of barycenter of the triangle that three intersection points are constituted
It is set to the position of the mobile terminal to be positioned.
2. the method for claim 1, it is characterised in that determine that mobile terminal to be positioned is received and the service according to MR
Second receiving power of three adjacent adjacent base stations of base station, specifically includes：
The some adjacent base stations adjacent with the serving BS are determined according to the MR；
Choose three adjacent base stations for meeting default constraints；
Determine that mobile terminal to be positioned receives second of each adjacent base station in three adjacent base stations for meeting default constraints
Receiving power.
3. method as claimed in claim 1 or 2, it is characterised in that according to first receiving power and described three
Two receiving powers, determine the mobile terminal to be positioned to the serving BS distance respectively with the mobile terminal to be positioned
The ratio of the distance of each adjacent base station, specifically includes in three adjacent base stations：
Calculate each second reception corresponding with three adjacent base stations respectively of corresponding first receiving power of the serving BS
The difference of power；
According to three differences and standard propagation model SPM, the mobile terminal to be positioned to the serving BS is determined
Distance respectively with the ratio of the distance of each adjacent base station in the mobile terminal to be positioned to three adjacent base stations.
4. method as claimed in claim 3, it is characterised in that according to three differences and standard propagation model SPM, really
The fixed mobile terminal to be positioned to the serving BS distance respectively with the mobile terminal to be positioned to three neighbours
The ratio of the distance of each adjacent base station, specifically includes in base station：
Below equation is determined according to standard propagation model SPM：
Wherein, formula (1) represents the X power that d0/dn is equal to 10, and the value of X is
The Δ PTX is the difference of the transmit power of the transmit power and current adjacent base station n of serving BS；The Δ RSRP is described
The difference of corresponding first receiving power of serving BS the second receiving power corresponding with current adjacent base station n；The Δ KCellnFor
The difference of the attenuation constant in the SPM coefficients of the serving BS and the attenuation constant in the SPM coefficients of current adjacent base station n；It is described
K3 is the height of transmitting antenna modifying factor of the serving BS and current adjacent base station n；The K5 is the serving BS and works as
The modifying factor of the antenna height logarithm value of preceding adjacent base station n；The Heff0 is that the corresponding antenna of the serving BS is effectively high
Degree；The Heffn is the corresponding antenna effective heights of current adjacent base station n；The d0 is the mobile terminal to be positioned described in
The distance of serving BS；The dTOAIt is the receiving and transmitting signal according to mobile terminal to be positioned base station corresponding with the serving BS
The mobile terminal described to be positioned that time difference determines is to the about equidistant of the serving BS；The dn is the movement to be positioned
Distance of the terminal to current adjacent base station n；
The difference is substituted into the formula (1), the mobile terminal to be positioned to the distance of the serving BS is calculated
Respectively with the ratio of the distance of each adjacent base station in the mobile terminal to be positioned to three adjacent base stations.
5. the method for claim 1, it is characterised in that using Apollo Nice circle theorem, according to described three for determining
The position of the position and three adjacent base stations of individual ratio and the serving BS, determines three A Shi circles, specifically includes：
For each ratio for determining：For determining the position and the position of the adjacent base station of the serving BS of the ratio
Put as two fixed points, using the ratio as Apollo Nice circle theorem in distance ratio, determine the ratio corresponding Ah
Family name justifies.
6. a kind of device positioned to mobile terminal based on MR, it is characterised in that including：
Receiving power determining unit, for determining that mobile terminal to be positioned receives the ginseng that serving BS sends according to measurement report MR
The first receiving power during signal is examined, and determines that mobile terminal to be positioned receives the adjacent base of three adjacent with the serving BS
The second receiving power during the reference signal for sending of standing；
Ratio determining unit, for according to first receiving power and three second receiving powers, it is determined that described treat
The distance of positioning mobile terminal to the serving BS is every with the mobile terminal to be positioned to three adjacent base stations respectively
The ratio of the distance of individual adjacent base station；
A Shi justifies determining unit, for using Apollo Nice circle theorem, according to three ratio and the clothes that determine
It is engaged in the position of base station and the position of three adjacent base stations, determining three A Shi circles；
Positioning unit, for when three A Shi circles intersect at a point, determining that the corresponding position of point of intersection is described undetermined
The position of position mobile terminal, or, for when three A Shi circles intersect at 3, determining three intersection points are constituted three
The corresponding position of angular barycenter is the position of the mobile terminal to be positioned.
7. device as claimed in claim 6, it is characterised in that the receiving power determining unit by perform following operation come
The second receiving power of mobile terminal to be positioned is determined according to measurement report MR：
The some adjacent base stations adjacent with the serving BS are determined according to MR；
Choose three adjacent base stations for meeting default constraints；
Determine that mobile terminal to be positioned receives what each adjacent base station in three adjacent base stations for meeting default constraints sent
The second receiving power during reference signal.
8. device as claimed in claims 6 or 7, it is characterised in that the ratio determining unit by perform following operation come
Determine the mobile terminal to be positioned to the serving BS distance respectively with the mobile terminal to be positioned to described three
The ratio of the distance of each adjacent base station in adjacent base station：
Calculate each second reception corresponding with three adjacent base stations respectively of corresponding first receiving power of the serving BS
The difference of power；
According to three differences and standard propagation model SPM, the mobile terminal to be positioned to the serving BS is determined
Distance respectively with the ratio of the distance of each adjacent base station in the mobile terminal to be positioned to three adjacent base stations.
9. device as claimed in claim 8, it is characterised in that the ratio determining unit is by performing following operation come basis
Three differences and standard propagation model SPM, determine the mobile terminal to be positioned to the distance point of the serving BS
Not with the ratio of the distance of each adjacent base station in the mobile terminal to be positioned to three adjacent base stations：
Below equation is determined according to standard propagation model SPM：
Wherein, formula (1) represents the X power that d0/dn is equal to 10, and the value of X is
The Δ PTX is the difference of the transmit power of the transmit power and current adjacent base station n of serving BS；The Δ RSRP is described
The difference of corresponding first signal reception power of serving BS secondary signal receiving power corresponding with current adjacent base station n；It is described
ΔKCellnThe attenuation constant in SPM coefficients for the attenuation constant in the SPM coefficients of the serving BS with current adjacent base station n it
Difference；The K3 is the height of transmitting antenna modifying factor of the serving BS and current adjacent base station n；The K5 is the service base
The modifying factor stood with the antenna height logarithm value of current adjacent base station n；The Heff0 has for the corresponding antenna of the serving BS
Effect height；The Heffn is the corresponding antenna effective heights of current adjacent base station n；The d0 is arrived for the mobile terminal to be positioned
The distance of the serving BS；The dTOAIt is the transmitting-receiving according to mobile terminal to be positioned base station corresponding with the serving BS
The mobile terminal described to be positioned that signal time difference determines is to the about equidistant of the serving BS；The dn is described to be positioned
Distance of the mobile terminal to current adjacent base station n；
The difference is substituted into the formula (1), the mobile terminal to be positioned to the distance of the serving BS is calculated
Respectively with the ratio of the distance of each adjacent base station in the mobile terminal to be positioned to three adjacent base stations.
10. device as claimed in claim 6, it is characterised in that the A Shi circle determining units by perform following operation come
Determine three A Shi circles：
For each ratio for determining：To determine that the position of the serving BS of the ratio and the position of the adjacent base station are made
Be two fixed points, using the ratio as Apollo Nice circle theorem in distance ratio, determine the ratio corresponding A Shi circles.
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