CN106535205A - Frequency re-farming cell setting method and system - Google Patents
Frequency re-farming cell setting method and system Download PDFInfo
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- CN106535205A CN106535205A CN201510584054.1A CN201510584054A CN106535205A CN 106535205 A CN106535205 A CN 106535205A CN 201510584054 A CN201510584054 A CN 201510584054A CN 106535205 A CN106535205 A CN 106535205A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
Abstract
The invention discloses a frequency re-farming cell setting method and a system. The method comprises steps of acquiring device design parameters of a frequency re-farming cell and a to-be-tested service cell; acquiring measurement report MR data of original standard base stations of the frequency re-farming cell and the to-be-tested service cell at multiple randomly selected sampling points; for each sampling point, according to the MR data and the device design parameters, determining whether the to-be-tested cell generates obvious same-frequency interference to the frequency re-farming cell one by one; and when the number of the sampling points for generating the obvious same-frequency interference exceeds a preset threshold value, setting the to-be-tested cell to be a space isolation strip cell of the frequency re-farming cell. The invention also discloses a frequency re-farming cell setting system.
Description
Technical field
The present invention relates to wireless communication network planning technical field, more particularly to a kind of frequency is backsetted cell setting
Method and system.
Background technology
With the development of wireless technology, the appearance of new traffic standard causes the distribution of usable spectrum more nervous,
Increasing operator was originally backsetted by the frequency that the relatively low standard of spectrum efficiency takes, and was applied to frequency
The higher standard of spectrum efficiency.During frequency is backsetted, due to new and old standard and deposit, very may be used in communication network
Co-channel interference can occurs, therefore, spatial separation band need to be appropriately arranged with communication network, with dry with frequency
Disturb enough insulation blockings are provided between serious new and old two region.
As spatial separation band generally need to build determination simultaneously before New Schemes housing estate development or at least, therefore,
Can not be determined by way of field test with the presence or absence of the setting scope of co-channel interference and spatial separation band.
At present, the setting of existing spatial separation band depend on emulation or engineering experience, subjective factorss affect compared with
Greatly, temporarily without clear and definite, easy objective setting principle, the matching degree of result and system actual state is set very
It is difficult accurately to control, once there is deviation, grid quality will be had a strong impact on, reduce Consumer's Experience, and
Need greatly into original improvement/maintenance system；And lacking the complex field of electronic chart or residing landform
Under scape, the effectiveness of existing method to set up further can be reduced.
The content of the invention
For solving existing technical problem, the embodiment of the present invention is expected to provide a kind of frequency cell of backsetting and is set
Method and system are put, objectively and accurately to judge co-channel interference situation, reasonably installation space isolation strip, carries
The construction efficiency that high system frequency is backsetted.
What the technical scheme of the embodiment of the present invention was realized in：
In the one side of the embodiment of the present invention, there is provided a kind of frequency is backsetted cell method to set up, including：
Obtain the frequency to backset the equipment design parameter of cell and tested Serving cell；
Gather respectively the frequency backset cell and/or the tested Serving cell former standard base station multiple
The measurement report MR data of the sample point for randomly selecting；
For sampled point each described, according to the MR data and the equipment design parameter, institute is judged one by one
State tested Serving cell cell of whether backsetting to the frequency and produce obvious co-channel interference；
When the number of the sampled point of obvious co-channel interference is produced more than predetermined threshold value, by the tested clothes
Business cell be set to the frequency backset cell spatial separation band cell.
Preferably, the co-channel interference includes：Tested Serving cell original standard base station cell of backsetting to frequency is new
The interference of standard terminal, tested Serving cell original standard terminal-pair frequency backset cell New Schemes base station interference,
Frequency backset cell New Schemes base station the interference of tested Serving cell original standard terminal and frequency are backsetted it is little
At least one of interference of the tested Serving cell original standard base station of area's New Schemes terminal-pair.
Preferably, gathering the MR data includes：
Frequency described in collection in worksite is backsetted the signal level that the former standard base station of cell is provided in the sample point
Value；
And/or,
The signal level that the former standard base station of tested Serving cell described in collection in worksite is provided in the sample point
Value.
Preferably, in methods described, the setting when number of the sampled point exceedes predetermined threshold value includes：
It is little that the sampled point number that obvious co-channel interference can be produced in the tested Serving cell accounts for the tested service
When area produces the whole sampling number purpose ratios for affecting more than first threshold,
And/or,
The sampled point number that obvious co-channel interference can be produced in the tested Serving cell accounts for whole sampled point numbers
Ratio exceed Second Threshold when,
By the tested Serving cell be set to the frequency backset cell spatial separation band cell.
Preferably, in methods described, the setting when number of the sampled point exceedes predetermined threshold value includes：
When the tested Serving cell can produce the sampled point number of obvious co-channel interference more than three threshold values,
By the tested Serving cell be set to the frequency backset cell spatial separation band cell.
In the another aspect of the embodiment of the present invention, also simultaneously provide a kind of frequency and backset cell setting system,
Including：
Parameter acquisition module, backsets the equipment design ginseng of cell and tested Serving cell for obtaining the frequency
Number；
Acquisition module, backsets the former system of cell and/or the tested Serving cell for gathering the frequency respectively
Measurement report MR data of the formula base station in multiple sample points for randomly selecting；
Determining interference module, for sampled point each described, designing according to the MR data and the equipment
Parameter, judges that tested Serving cell cell of whether backsetting to the frequency produces obvious co-channel interference one by one；
Cell setup module, exceedes default threshold for the number in the sampled point for producing obvious co-channel interference
During value, by the tested Serving cell be set to the frequency backset cell spatial separation band cell.
Preferably, the determining interference module includes that first direction determining interference module, second direction interference are sentenced
At least one of cover half block, third direction determining interference module and fourth direction determining interference module；Wherein,
The first direction determining interference module, for judging the tested Serving cell original standard base station to institute
State frequency to backset the interference of cell New Schemes terminal；
The second direction determining interference module, for judging the tested Serving cell original standard terminal-pair institute
State frequency to backset the interference of cell New Schemes base station；
The third direction determining interference module, for judging that the frequency backsets cell New Schemes base station to institute
State the interference of tested Serving cell original standard terminal；
The fourth direction determining interference module, for judging that the frequency is backsetted cell New Schemes terminal-pair institute
State the interference of tested Serving cell original standard base station.
Preferably, the acquisition module includes：
First signal acquisition module, for frequency described in collection in worksite backset cell former standard base station described
The signal level value that sample point is provided；
And/or,
Secondary signal acquisition module, for tested Serving cell described in collection in worksite former standard base station described
The signal level value that sample point is provided.
Preferably, the cell setup module includes：
First setup module, for producing the sampling number of obvious co-channel interference in the tested Serving cell
When mesh accounts for whole sampling number purpose ratios of the tested Serving cell generation impact more than first threshold, will
The tested Serving cell be set to the frequency backset cell spatial separation band cell；
And/or,
Second setup module, for producing the sampling number of obvious co-channel interference in the tested Serving cell
When mesh accounts for whole sampling number purpose ratios more than Second Threshold, the tested Serving cell is set to described
Frequency backset cell spatial separation band cell.
Preferably, the cell setup module includes：
3rd setup module, for producing the sampling number of obvious co-channel interference in the tested Serving cell
When mesh is more than three threshold values, the tested Serving cell is set to into the frequency and is backsetted the spatial separation of cell
Band cell.
The embodiment of the present invention expects that the frequency for providing is backsetted cell method to set up and system, the former standard of existing network collection
The MR data messages of equipment, pass through, and objectively and accurately judge co-channel interference degree, so as to explicitly indicate
The cell of spatial separation band need to be arranged to；The technical scheme reliability of the embodiment of the present invention is high and true, efficiently,
It is easy, enormously simplify frequency backset cell arrange time space interval far from region network planning flow process, improve
The construction efficiency that communication network frequency is backsetted.
Description of the drawings
Fig. 1 is that one embodiment of the present of invention medium frequency is backsetted the schematic flow sheet of cell method to set up；
Fig. 2 is the schematic diagram of typical co-channel interference form in the embodiment of the present invention；
When Fig. 3 is for judging in the embodiment of the present invention that tested Serving cell original standard base station produces co-channel interference degree
Collection MR schematic diagram datas；
When Fig. 4 is for judging in the embodiment of the present invention that tested Serving cell original standard terminal produces co-channel interference degree
Collection MR schematic diagram datas；
Fig. 5 be the embodiment of the present invention in judge frequency backset cell New Schemes base station produce co-channel interference degree when
Collection MR schematic diagram datas；
Fig. 6 be the embodiment of the present invention in judge frequency backset cell New Schemes terminal produce co-channel interference degree when
Collection MR schematic diagram datas；
Fig. 7 be embodiment of the present invention medium frequency backset cell arrange system modular structure schematic diagram.
Specific embodiment
First, illustratively co-channel interference phenomenon, because original standard will be continuing with, therefore what frequency was backsetted
The construction of New Schemes cell is often to increase New Schemes base station to be formed on the basis of former standard cell, Zhi Nengyi
Enter line frequency according to former standard load of base station and frequency use condition to backset, this causes each cell actually rise use
Bandwidth or center frequency point can not be consistent, identical frequency band may by the New Schemes base station of two adjacent cells with it is former
Standard base station takes respectively, in the range of the two cell joint effects terminal can receive two kinds of same frequency it is different
Standard signal, is not belonging to the normal work of the homogenous frequency signal meeting interfered with terminal of terminal work at present standard.Depositing
In the case of serious co-channel interference, it is the normal work for ensureing terminal, needs cell of backsetting to frequency to do
Disturb serious Serving cell to be set to spatial separation and bring carry out insulation blocking.
In practical situation, as spatial separation band generally need to determine before frequency backsets housing estate development that this is stylish
Standard base station and New Schemes terminal there is no, therefore co-channel interference degree cannot be real at installation space isolation strip
Border measures, prior art can only rely on more subjective emulation or engineering experience arrange frequency backset cell and
Corresponding spatial separation band.
The former standard that the embodiment of the present invention is gathered by existing network measurement report (Measurement Report,
MR) data come determine reality co-channel interference degree, thereby determine that the setting scope of spatial separation band, so as to
Realize objective, accurate frequency to backset the setting of cell.As shown in figure 1, the frequency weight of the embodiment of the present invention
Cultivated cell method to set up includes：
S1：Obtain the frequency to backset the equipment design parameter of cell and tested Serving cell；
S2：Gather respectively the frequency backset cell and the tested Serving cell former standard base station multiple
The MR data of the sample point for randomly selecting；
S3：For sampled point each described, according to the MR data and the equipment design parameter, one by one
Judge that tested Serving cell cell of whether backsetting to the frequency produces obvious co-channel interference；
S4：When the number of the sampled point of obvious co-channel interference is produced more than predetermined threshold value, by the quilt
Survey Serving cell be set to the frequency backset cell spatial separation band cell.
Further, as illustrated in fig. 2, it is assumed that frequency is backsetted cell 1 built complete and not installation space every
From band, tested Serving cell 2 is to backset certain Serving cell that cell 1 closes on frequency, because of building for former standard
If more ripe, co-channel interference is existed only between the base station of different districts different systems and terminal.For letter
Change analysis, in communication network environment shown in Fig. 2, at least there is following equipment：Frequency is backsetted the New Schemes of cell 1
Base station NB1new, belong to frequency and backset the New Schemes terminal UE 1 of cell 1new, tested Serving cell 2 original
Standard base station NB2legacy, belong to the former standard terminal UE 2 of tested Serving cell 2legacy。
In the figure 2 example, co-channel interference is likely to be present in four direction：Tested Serving cell original standard base station
NB2legacyCell that frequency is backsetted New Schemes terminal UE 1newInterference, frequency backsets cell New Schemes terminal
UE1newTo tested Serving cell original standard base station NB2legacyInterference, frequency backsets cell New Schemes base station
NB1newTo tested Serving cell original standard terminal UE 2legacyInterference, tested Serving cell original standard terminal
UE2legacyCell that frequency is backsetted New Schemes base station NB1newInterference.Relevant technical staff in the field can manage
Solution, the backset tested Serving cell of cell of adjacent frequency may have multiple, or the tested Serving cell in part can
New Schemes equipment can be there is also to be disturbed by the backset former standard equipment of cell of frequency, but each tested service
Cell can be processed by the way of the embodiment of the present invention, and the situation of reverse interference only frequency need to be backsetted it is little
Area can be processed by the way of the embodiment of the present invention with the location swap of tested Serving cell, therefore the example of Fig. 2
In be not the analytic explanation one by one to whole disturbed conditions.
Fig. 2 is only the schematic diagram of interference principle, and in practical situation, the co-channel interference in aforementioned four direction cannot
Determine in advance, therefore the preferred embodiments of the present invention further provide the objective co-channel interference for judging all directions
The technical scheme of degree.Specifically include the following aspects：
Firstth, former standard base station NB2legacyTo New Schemes terminal UE 1newInterference：
New Schemes terminal UE 1 will such as be ensurednewThe performance of normal work, usually requires that the New Schemes terminal
UE1newSignal to Interference plus Noise Ratio (Signal to Interference plus Noise at current sampling point
Ratio, SINR) be not less than a certain threshold value, i.e.,
SINR1new=R1new-I1new≥SINR1New, Thd(1)；
Wherein, SINR1newFor the New Schemes terminal UE 1newSignal at current sampling point is made an uproar with disturbing to add
Acoustic ratio, which is backsetted cell New Schemes base station NB1 by frequencynewIt is the New Schemes terminal at current sampling point
UE1newThe signal level value R1 of offernewWith tested Serving cell original standard base station NB2legacyAdopt currently
To the New Schemes terminal UE 1 at sampling pointnewInterference level value I1 of generationnewIt is determined that, SINR1New, ThdFor protecting
Card New Schemes terminal UE 1newThe Signal to Interference plus Noise Ratio threshold value of normal work.SINR1New, ThdIt is default
Index, R1newAnd I1newCannot practical measurement, the preferred embodiment of the present invention is further with MR data
Objective determination R1newAnd I1new。
Specifically, because the construction of two cells original standard equipment is ripe, the former standard equipment at current sampling point
Related MR data can collection in worksite, as shown in figure 3, judge first direction co-channel interference degree need to adopt
The MR data of collection include：Frequency is backsetted cell original standard base station NB1legacyIt is to belong at current sampling point
Frequency is backsetted the former standard terminal UE 1 of celllegacyThe signal level value R1 of offerlegacy, and tested service
Cell original standard base station NB2legacyThe signal level value R2 provided at current sampling pointlegacy.In actual system
In system, useful signal and interference signal differ only in whether signal is the currently used signal of terminal, same
The signal in source by terminal using when be available signal, not by terminal use when be exactly interference signal, so
Place R2legacyActual is exactly tested Serving cell original standard base station NB2legacyTo former standard terminal UE 1legacyProduce
Raw interference level value.
Again as the equipment design parameter of two cells can be obtained from business system, can be rolled over by appropriate ways
Calculate New Schemes data.Cell Central Plains, New Schemes base station antenna feeder and the antenna increasing altogether where it is assumed that frequency is backsetted
Identical, the New Schemes base station NB1 of benefitnewWith former standard base station NB1legacyThe difference of signal intensity at the current sampling point
Value is difference D of two base station transmitting powers1, can obtain：R1new=
R1legacy-D1。
Additionally, tested Serving cell original standard base station NB2legacyTransmission power, transmitted bandwidth and New Schemes end
The signal bandwidth at end belongs to design parameter, can be in bandwidth ratio switching emission power in the signal bandwidth
Signal level value D2(actual is interference level value), can obtain：I1new=
R2legacy-D2；
Then above-mentioned determining type (1) can be exchanged into：
SINR1new=R1new-I1new=R1legacy-D1-(R2legacy-D2)≥SINR1New, Thd；
That is R1legacy-R2legacy≥SINR1new,Thd+D1-D2=T1
(2)。
Wherein, R1legacyAnd R2legacyFor the MR data of collection in worksite, T1(i.e. SINR1New, Thd+D1-
D2) can be determined by design parameter, these truthful datas objective can determine former standard base station NB2legacyTo brand-new
Formula terminal UE 1newAnnoyance level, i.e., when at the current sampling point, above-mentioned determining type (2) cannot meet, quilt
Survey can backset to the frequency downlink data of cell of Serving cell and produce more obvious co-channel interference.
Secondth, original standard terminal UE 2legacyTo New Schemes base station NB1newInterference：
As up signal to noise ratio is affected by many factors such as offered loads, it is more difficult to obtain original by uplink information
Standard terminal UE 2legacyTo New Schemes base station NB1newImpact, therefore made an uproar lifting by up bottom in the direction
To quantify annoyance level.
In theory, former standard terminal UE 2legacyTransmission power T2legacy,t, it is assumed that New Schemes base station NB1new
Value make an uproar for N in bottom in unit recipient bandwidth1(dBm), its acceptable sensitivity drop-out value is A1(dB), then its
Acceptable interference signal intensity isMeet the index, former standard terminal
UE2legacyTo New Schemes base station NB1newIsolation (i.e. path loss) PL provided on direction1Should be not less than
But former standard terminal UE 2legacyUp path loss actually cannot measure, the embodiment of the present invention pass through descending side
To path loss determine.According to design parameter, former standard base station NB1legacyTransmission power is T1legacy,b, such as Fig. 4
It is shown, the former standard base station NB1 that collection in worksite can be received at current sampling pointlegacyThe downstream signal of generation
Level value R1legacy, then isolation (i.e. path loss) require be changed into：
I.e.
Wherein, R1legacyFor the MR data of collection in worksite, T2Can be determined by design parameter, these true numbers
According to former standard terminal UE 2 objective can be determinedlegacyTo New Schemes base station NB1newAnnoyance level, i.e., adopt currently
When at sampling point, above-mentioned determining type (3) cannot meet, tested Serving cell can be backsetted to frequency the upper line number of cell
According to the more obvious co-channel interference of generation.
3rd, New Schemes base station NB1newTo former standard terminal UE 2legacyInterference：
Former standard terminal UE 2 will such as be ensuredlegacyThe performance of normal work, usually requires that the former standard terminal
UE2legacySignal to Interference plus Noise Ratio at current sampling point is not less than a certain threshold value, i.e.,
SINR2legacy
=R2legacy-I2legacy≥SINR2legacy,Thd(4)；
Wherein, SINR2legacyFor the former standard terminal UE 2legacySignal at current sampling point is added with interference
Noise ratio, which is by tested Serving cell original standard base station NB2legacyIt is the former standard terminal at current sampling point
UE2legacyThe signal level value R2 of offerlegacyBackset cell New Schemes base station NB1 with frequencynewAdopt currently
To the former standard terminal UE 2 at sampling pointlegacyInterference level value I2 of generationlegacyIt is determined that, SINR2Legacy, Thd
For ensureing former standard terminal UE 2legacyThe Signal to Interference plus Noise Ratio threshold value of normal work.
SINR2Legacy, ThdIt is default index, I2legacyCannot practical measurement, the preferred embodiment of the present invention is further
Using the objective determination I2 of MR datalegacy。
Specifically, because the construction of two cells original standard equipment is ripe, the former standard equipment at current sampling point
Related MR data can collection in worksite, as shown in figure 5, judge the direction co-channel interference degree need collection
MR data include：Frequency is backsetted cell original standard base station NB1legacyAt the current sampling point to belong to by
Survey the former standard terminal UE 2 of Serving celllegacyThe signal level value R1 of offerlegacy(actual is interference level
Value), and tested Serving cell original standard base station NB2legacyTo the former standard terminal at current sampling point
UE2legacyThe signal level value R2 of offerlegacy。
The equipment design parameter of two cells can be obtained from business system, can be converted into newly by appropriate ways
Standard data.Cell Central Plains, the New Schemes base station altogether antenna feeder and antenna gain is identical where it is assumed that frequency is backsetted,
New Schemes base station NB1newWith former standard base station NB1legacySignal intensity is (actual for interference at the current sampling point
Intensity) difference be two base station transmitting powers difference D1, can obtain：I2legacy
=R1legacy-D1。
Then above-mentioned determining type (4) can be exchanged into：SINR2legacy=R2legacy-I2legacy=R2legacy-
(R1legacy-D1)≥SINR2Legacy, Thd；
That is R2legacy-R1legacy≥SINR2Legacy, Thd+D1=
T3 (5)。
Wherein, R2legacyAnd R1legacyFor the MR data of collection in worksite, T3Can be determined by design parameter, this
A little truthful datas can objective determination New Schemes base station NB1newTo former standard terminal UE 2legacyAnnoyance level, i.e.,
When at current sampling point, above-mentioned determining type (5) cannot meet, frequency backsets cell can be to tested Serving cell
Downlink data produce more obvious co-channel interference.
4th, New Schemes terminal UE 1newTo former standard base station NB2legacyInterference：
As up signal to noise ratio is affected by many factors such as offered loads, it is more difficult to obtained newly by uplink information
Standard terminal UE 1newTo former standard base station NB2legacyImpact, therefore made an uproar lifting by up bottom in the direction
To quantify annoyance level.
In theory, New Schemes terminal UE 1newTransmission power T1new,t, it is assumed that former standard base station NB2legacy
Value make an uproar for N in bottom in unit recipient bandwidth2(dBm), its acceptable sensitivity drop-out value is A2(dB), then its
Acceptable interference signal intensity isMeet the index, New Schemes terminal
UE1newTo former standard base station NB2legacyIsolation (i.e. path loss) PL provided on direction2Should be not less than
But New Schemes terminal UE 1 before buildingnewPath loss actually cannot measure, the embodiment of the present invention is by descending
The path loss in direction determines.According to design parameter, former standard base station NB2legacyTransmission power is T2legacy,b, such as
Shown in Fig. 6, the former standard base station NB2 that collection in worksite can be received at current sampling pointlegacyWhat is provided is descending
Signal level value R2legacy, then isolation (i.e. path loss) require be changed into：
I.e.
Wherein, R2legacyFor the MR data of collection in worksite, T4Can be determined by design parameter, these truthful datas
Can objective determination New Schemes terminal UE 1newTo former standard base station NB2legacyAnnoyance level, i.e., in present sample
When at point, above-mentioned determining type (6) cannot meet, frequency backsets cell can be to the upstream data of tested Serving cell
Produce more obvious co-channel interference.
As the above analysis, only need to each sampled point respectively frequency acquisition backset cell and tested service it is little
The signal level value that the former standard base station in area provides, in conjunction with two cells equipment design parameter (including each base
Stand transmission power, each terminal transmission power, each Base Transmitter bandwidth, each terminal signaling bandwidth and each equipment letter
Number index etc.), so that it may each sampled point it is objective, judge whether generate in all directions significantly exactly
Co-channel interference.
It is little that tested Serving cell is considered as into interference obvious co-channel interference is produced on any one direction no matter by
Area, but for reducining the construction costs and complexity, and need not by whole interfered cells be all set to frequency backset it is little
The spatial separation band cell in area.In the preferred embodiment of the present invention, further by obvious co-channel interference can be produced
Sampled point number or ratio-dependent whether need by interfered cell be set to spatial separation band cell.
Specifically, in a preferred embodiment of the invention, for a certain tested Serving cell, if its meeting
The sampled point number for producing obvious co-channel interference accounts for which and produces the whole sampling number purpose ratios for affecting more than the
One threshold value, and/or its sampled point number that can produce obvious co-channel interference account for whole sampling number purpose ratios surpass
Cross Second Threshold, it is determined that by the tested Serving cell be set to frequency backset cell spatial separation band it is little
Area.Relative simplicity ground, in another preferred embodiment of the invention, for a certain tested Serving cell,
If which can produce the sampled point number of obvious co-channel interference more than the 3rd threshold value, it is determined that by the tested service
Cell be set to frequency backset cell spatial separation band cell.Wherein, first, second and/or the 3rd threshold value
Be the frequency backset plot planning when default index, each index is according to communication network development cost, network
The assessment setting of the combined factors such as quality of service requirement, community user number and main users type.
The embodiment of the present invention can be used to GSM frequencies be backsetted to LTE FDD, and CDMA backsets to LTE FDD,
GSM backsets to WCDMA, and WCDMA backsets scenes multiple to LTE FDD etc..It is in practical application, former
Standard base station affects larger to New Schemes terminal and former standard terminal-pair New Schemes base station, such as, in GSM frequencies
When rate is backsetted to LTE FDD, GSM base stations are to LTE FDD terminals and GSM terminal-pair LTE FDD base stations shadow
Sound is larger.Therefore the sampling analyses situation on the two directions is stressed below by way of concrete application scene.
The interference of scene 1, GSM base stations to LTE FDD terminals：
For ensureing the performance of LTE FDD terminals, in order to be sufficiently accurate it may be desired to which frequency is backsetted the noise of LTE FDD terminals in cell 1
Than being more than -3dB, i.e.,：
SINR1LTE=R1LTE-I1LTE≥-3dB。
Assume that frequency is backsetted in cell 1 LTE, GSM base station antenna feeder and antenna gain is identical altogether, LTE FDD with
The difference of GSM signal intensitys is the difference of two systems transmission power.Assume that frequency is backsetted GSM in cell 1
Base station is launched with 20W (43dBm) power list carrier frequency, and LTE FDD reference signal powers are 15dBm, if
Frequency is backsetted in the former standard MR data that cell 1 collects, and the backset GSM base stations of cell 1 of frequency provide letter
Number level value is R1GSMWhen, then it is same sampling dot frequency backset cell 1 LTE FDD base stations provide signal
Level value will be R1LTE=
R1GSM- (43-15)=
R1GSM-28。
For tested Serving cell 2, if its GSM base station is R2 in the signal level value that sample point is providedGSM
(being actually the interference level value that LTE FDD terminals are produced in cell 1 of backsetting to frequency), due to tested service
, in 200KHz bandwidth, which is to LTE FDD terminal references signals for the GSM base stations 20W power distributions of cell 2
(15KHz) interference is
Therefore, if signal to noise ratio index, R1 need to be metGSMAnd R2GSMShould meet with lower inequality：
R1GSM-R2GSM>=-3+28-12=
13。
The tested Serving cell of above-mentioned condition is unsatisfactory for, cell downlink data of backsetting to frequency are produced more
Obvious co-channel interference.Subsequently whether should according to the sampled point number and/or ratio-dependent for producing co-channel interference
Tested Serving cell is set to spatial separation band cell.
Scene 2, the interference of GSM terminal-pair LTE FDD base stations：
Assume frequency backset cell 1 LTE FDD basic unit reception bandwidths on bottom make an uproar value be -113 (dBm),
Its acceptable sensitivity drop-out value is 0.8dB, then its acceptable interference signal intensity is -124.9dB.
Further according to transmission power 33dBm of the GSM terminals of tested Serving cell 2, the then isolation that the direction need to be provided
Degree (path loss) should be not less than 157.9dBm.Again frequency is backsetted the GSM base station transmitting power 43dBm of cell 1,
Collection in worksite its produce downlink signal levels value R1GSM, then isolation (path loss) require be changed into：
R1GSM≤ 43-33-124.9=
-114.9dBm。
The tested Serving cell of above-mentioned condition is unsatisfactory for, cell downlink data of backsetting to frequency are produced more
Obvious co-channel interference.Subsequently whether should according to the sampled point number and/or ratio-dependent for producing co-channel interference
Tested Serving cell is set to spatial separation band cell.
After it is determined that being arranged to spatial separation band cell, respective cell need to carry out rising frequency, rise frequency principle general
For：The frequency partition of cell of being backsetted according to frequency, it is determined that by different systems equipment in spatial separation band cell
Shared similar frequency bands, will vacate without or are deployed to backset cell with frequency after the similar frequency bands clear frequency
The equipment of identical standard is used.In actual applications, spatial separation band cell both sides may be simultaneously present frequency
Backset cell, then equally determine and rise frequency according to the backset information summary of cell of the frequency of both sides using mentioned above principle
Frequency range, specifically rises frequency measure and belongs to prior art, the not reinflated description of here.
As shown in fig. 7, the embodiment of the present invention also provides a kind of frequency cell of backsetting arranges system 7 simultaneously, wrap
Include：
Parameter acquisition module 701, backsets the equipment design of cell and tested Serving cell for obtaining the frequency
Parameter；
Acquisition module 702, backsets the former system of cell and the tested Serving cell for gathering the frequency respectively
MR data of the formula base station in multiple sample points for randomly selecting；
Determining interference module 703, for sampled point each described, according to the MR data and the equipment
Design parameter, judges whether the tested Serving cell backsets cell generation substantially with frequency to the frequency one by one
Interference；
Cell setup module 704, exceedes for the number in the sampled point for producing obvious co-channel interference default
During threshold value, by the tested Serving cell be set to the frequency backset cell spatial separation band cell.
Preferably, the determining interference module includes that first direction determining interference module, second direction interference are sentenced
At least one of cover half block, third direction determining interference module and fourth direction determining interference module；Wherein,
The first direction determining interference module, for judging the tested Serving cell original standard base station to institute
State frequency to backset the interference of cell New Schemes terminal；
The second direction determining interference module, for judging the tested Serving cell original standard terminal-pair institute
State frequency to backset the interference of cell New Schemes base station；
The third direction determining interference module, for judging that the frequency backsets cell New Schemes base station to institute
State the interference of tested Serving cell original standard terminal；
The fourth direction determining interference module, for judging that the frequency is backsetted cell New Schemes terminal-pair institute
State the interference of tested Serving cell original standard base station.
In embodiments of the present invention, two class MR data of main collection, therefore the acquisition module includes：
First signal acquisition module, for frequency described in collection in worksite backset cell former standard base station described
The signal level value that sample point is provided；
And/or,
Secondary signal acquisition module, for tested Serving cell described in collection in worksite former standard base station described
The signal level value that sample point is provided.
In a preferred embodiment of the invention, by interference sample point ratio-dependent, whether installation space isolation strip is little
Area, then preferably, the cell setup module includes：
First setup module, for producing the sampling number of obvious co-channel interference in the tested Serving cell
When mesh accounts for whole sampling number purpose ratios of the tested Serving cell generation impact more than first threshold, will
The tested Serving cell be set to the frequency backset cell spatial separation band cell；
And/or,
Second setup module, for producing the sampling number of obvious co-channel interference in the tested Serving cell
When mesh accounts for whole sampling number purpose ratios more than Second Threshold, the tested Serving cell is set to described
Frequency backset cell spatial separation band cell.
In another preferred embodiment of the invention, directly counted out by interference sample and determine whether installation space
Isolation strip cell, then preferably, the cell setup module includes：
3rd setup module, for producing the sampling number of obvious co-channel interference in the tested Serving cell
When mesh is more than three threshold values, the tested Serving cell is set to into the frequency and is backsetted the spatial separation of cell
Band cell.
Preferably, said frequencies backset cell arrange system can be realized by autonomous device, such as mobile terminal
Or the separate functional unit loaded by mobile terminal；Can also realize with multiple distinct devices, such as
Acquisition module be independent movement/fixing equipment, and other modules then by background terminal, processing equipment and/or clothes
Business device is realized.In actual applications, in system each module (including but not limited to parameter acquisition module, dry
Disturb determination module, cell setup module, first direction determining interference module, second direction determining interference module,
Third direction determining interference module, fourth direction determining interference module, the first setup module, second arrange mould
Block, the 3rd setup module etc.) can be by central processing unit (the Central Processing in system equipment
Unit, CPU), microprocessor (Micro Processor Unit, MPU), digital signal processor (Digital
Signal Processor, DSP), or field programmable gate array (Field Programmable Gate Array,
) etc. FPGA realize.Acquisition module, the first signal acquisition module and secondary signal acquisition module etc. are then by corresponding
Signals collecting sensor, signal gathering unit or signal collecting device etc. realize.
Embodiments provide a kind of frequency to backset cell method to set up and system, can be gathered by existing network
Information, objectively and accurately judge co-channel interference degree, spatial separation need to be arranged to so as to explicitly indicate
The cell of band, its technical scheme reliability are high and true, efficient, easy, enormously simplify frequency backset it is little
Area arranges network planning flow process of the time space interval far from region, improves the construction effect that communication network frequency is backsetted
Rate.
The above, only presently preferred embodiments of the present invention is not intended to limit the protection model of the present invention
Enclose.
Claims (10)
1. a kind of frequency is backsetted cell method to set up, it is characterised in that methods described includes：
Obtain the frequency to backset the equipment design parameter of cell and tested Serving cell；
Gather respectively the frequency backset cell and/or the tested Serving cell former standard base station multiple
The measurement report MR data of the sample point for randomly selecting；
For sampled point each described, according to the MR data and the equipment design parameter, institute is judged one by one
State tested Serving cell cell of whether backsetting to the frequency and produce obvious co-channel interference；
When the number of the sampled point of obvious co-channel interference is produced more than predetermined threshold value, by the tested clothes
Business cell be set to the frequency backset cell spatial separation band cell.
2. method according to claim 1, it is characterised in that the co-channel interference includes：Tested clothes
Business cell original standard base station frequency is backsetted cell New Schemes terminal interference, tested Serving cell original standard end
The end interference of cell New Schemes base station, frequency cell New Schemes base station of backsetting of backsetting to frequency is little to tested service
The interference of area's original standard terminal and frequency are backsetted the tested Serving cell original standard base of cell New Schemes terminal-pair
At least one of interference stood.
3. method according to claim 1, it is characterised in that the collection MR data include：
Frequency described in collection in worksite is backsetted the signal level that the former standard base station of cell is provided in the sample point
Value；
And/or,
The signal level that the former standard base station of tested Serving cell described in collection in worksite is provided in the sample point
Value.
4. method according to claim 1, it is characterised in that in methods described, the sampled point
Setting when number exceedes predetermined threshold value includes：
It is little that the sampled point number that obvious co-channel interference can be produced in the tested Serving cell accounts for the tested service
When area produces the whole sampling number purpose ratios for affecting more than first threshold,
And/or,
The sampled point number that obvious co-channel interference can be produced in the tested Serving cell accounts for whole sampled point numbers
Ratio exceed Second Threshold when,
By the tested Serving cell be set to the frequency backset cell spatial separation band cell.
5. method according to claim 4, it is characterised in that in methods described, the sampled point
Setting when number exceedes predetermined threshold value includes：
When the tested Serving cell can produce the sampled point number of obvious co-channel interference more than three threshold values,
By the tested Serving cell be set to the frequency backset cell spatial separation band cell.
6. a kind of frequency backset cell arrange system, it is characterised in that the system includes：
Parameter acquisition module, backsets the equipment design ginseng of cell and tested Serving cell for obtaining the frequency
Number；
Acquisition module, backsets the former system of cell and/or the tested Serving cell for gathering the frequency respectively
Measurement report MR data of the formula base station in multiple sample points for randomly selecting；
Determining interference module, for sampled point each described, designing according to the MR data and the equipment
Parameter, judges that tested Serving cell cell of whether backsetting to the frequency produces obvious co-channel interference one by one；
Cell setup module, exceedes default threshold for the number in the sampled point for producing obvious co-channel interference
During value, by the tested Serving cell be set to the frequency backset cell spatial separation band cell.
7. system according to claim 6, it is characterised in that the determining interference module includes first
Direction determining interference module, second direction determining interference module, third direction determining interference module and are cubic
To at least one of determining interference module；Wherein,
The first direction determining interference module, for judging the tested Serving cell original standard base station to institute
State frequency to backset the interference of cell New Schemes terminal；
The second direction determining interference module, for judging the tested Serving cell original standard terminal-pair institute
State frequency to backset the interference of cell New Schemes base station；
The third direction determining interference module, for judging that the frequency backsets cell New Schemes base station to institute
State the interference of tested Serving cell original standard terminal；
The fourth direction determining interference module, for judging that the frequency is backsetted cell New Schemes terminal-pair institute
State the interference of tested Serving cell original standard base station.
8. system according to claim 6, it is characterised in that the acquisition module includes：
First signal acquisition module, for frequency described in collection in worksite backset cell former standard base station described
The signal level value that sample point is provided；
And/or,
Secondary signal acquisition module, for tested Serving cell described in collection in worksite former standard base station described
The signal level value that sample point is provided.
9. system according to claim 6, it is characterised in that the cell setup module includes：
First setup module, for producing the sampling number of obvious co-channel interference in the tested Serving cell
When mesh accounts for whole sampling number purpose ratios of the tested Serving cell generation impact more than first threshold, will
The tested Serving cell be set to the frequency backset cell spatial separation band cell；
And/or,
Second setup module, for producing the sampling number of obvious co-channel interference in the tested Serving cell
When mesh accounts for whole sampling number purpose ratios more than Second Threshold, the tested Serving cell is set to described
Frequency backset cell spatial separation band cell.
10. system according to claim 6, it is characterised in that the cell setup module includes：
3rd setup module, for producing the sampling number of obvious co-channel interference in the tested Serving cell
When mesh is more than three threshold values, the tested Serving cell is set to into the frequency and is backsetted the spatial separation of cell
Band cell.
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