CN105451247B - A kind of method and apparatus for assessing network structure - Google Patents
A kind of method and apparatus for assessing network structure Download PDFInfo
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- CN105451247B CN105451247B CN201410437053.XA CN201410437053A CN105451247B CN 105451247 B CN105451247 B CN 105451247B CN 201410437053 A CN201410437053 A CN 201410437053A CN 105451247 B CN105451247 B CN 105451247B
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Abstract
The embodiment of the present invention provides a kind of method and apparatus for assessing network structure, and method includes：Obtain the frequency sweep data of each frequency sweep point；The available signal number of cells N of each frequency sweep point, the secondary carrier sum M of available signal cell are calculated according to frequency sweep data；The co-channel interference value of available signal cell between any two is calculated according to secondary carrier sum, the co-channel interference value is modified using scrambling code group correlation, obtains the interference value between available signal cell；Network structure index is calculated according to the interference value between available signal number of cells N, secondary carrier sum M and available signal cell, the network structure index is to assess network structure.According to network overlapped coverage, secondary carrier and the disturbing factor for netting interior minizone, quantitative analysis of the network structure index realization to network presence is calculated, the more big then network structure of network structure index is more complicated, and the space of optimization is bigger.
Description
Technical field
The present invention relates to mobile communication network technologies, particularly relate to a kind of method and apparatus for assessing network structure.
Background technique
TD SDMA (TD, Time Division-Synchronous Code Division Multiple
Access) the overlapping covering of network, pilot pollution, website height are matched and are increasingly highlighted the problems such as netting interior interference, need a kind of effective
Evaluation measures know the real situation network structure, to objectively evaluate the overall performance of network.
Current existing appraisal procedure is only limitted to carry out Railway Project the assessment of single dimension, the shape of Single-issue is presented
Condition.
There are the following problems for the prior art：In face of increasingly complicated network, single dimension assesses the overall performance of network often
It attends to one thing and lose sight of another, is unable to satisfy the demand for obtaining network overall condition.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method and apparatus for assessing network structure, solve the prior art
The overall performance of single dimension assessment network is unable to satisfy the defect for obtaining network overall condition.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of method for assessing network structure, including：It obtains
The frequency sweep data of each frequency sweep point；The available signal number of cells N and available signal of each frequency sweep point are calculated according to frequency sweep data
The secondary carrier sum M of cell；The co-channel interference value of available signal cell between any two is calculated according to secondary carrier sum, to described same
Frequency interference value is modified using scrambling code group correlation, obtains the interference value between available signal cell；It is small according to available signal
Interference value between area's number N, secondary carrier sum M and available signal cell calculates network structure index, the network structure
Index is to assess network structure.
In the method, the frequency sweep data for obtaining each frequency sweep point further include later：Give up lack frequency sweep point, scrambling code or
The frequency sweep data of longitude and latitude；Low level frequency sweep that give up the highly sensitive acquisition based on sweep generator and that mobile terminal can not parse
Data；Take the identical same cell of longitude and latitude multiple periods level average as the frequency sweep data.
In the method, further include：Frequency sweep point is searched in basic data and generates the cell of scrambling code；By what is found
For cell according to the distance-taxis with frequency sweep point, distance is the cell of the corresponding peak signal of frequency sweep point recently.
In the method, the secondary carrier sum M of the available signal cell on each frequency sweep point is calculated according to frequency sweep data
Including：Calculate the available signal cell number on each frequency sweep point with the signal difference of the cell of the peak signal within 6dB
Mesh N, the available signal cell include the cell itself of peak signal；Calculate the secondary carrier sum of N number of available signal cell
M。
In the method, calculating the co-channel interference value of available signal cell between any two according to secondary carrier sum includes：
Be arranged available signal minizone co-channel interference value include it is main with frequency, it is major-minor with frequency and it is auxiliary with frequency；It is selected one current small
Area successively calculates the same frequency weight between the carrier wave and all carrier waves of another cell for each carrier wave of current area,
And the co-channel interference value that all same frequency weights that adds up obtain another cell for current area.
In the method, the co-channel interference value is modified using scrambling code group correlation, it is small to obtain available signal
Interference value between area includes：To the co-channel interference value between any one available signal cell, respectively multiplied by corresponding available
Scrambling code group correlation between signal cell, obtains the interference value co between available signal cellsi*X。
In the method, according to dry between available signal number of cells N, secondary carrier sum M and available signal cell
It disturbs value and calculates network structure index and include：Secondary carrier sum M is modified, it is revised by available signal number of cells N
Interference value co between secondary carrier sum M and available signal cellsi* X carries out cumulative summation, obtains the network knot of corresponding frequency sweep point
Structure index.
A kind of device for assessing network structure, including：Frequency sweep data capture unit, for obtaining the frequency sweep of each frequency sweep point
Data；Available cell and secondary carrier unit, for calculated according to frequency sweep data each frequency sweep point available signal number of cells N and
The secondary carrier sum M of available signal cell；Value cell is interfered, for calculating the co-channel interference of available signal cell between any two
Value is modified the co-channel interference value using scrambling code group correlation, obtains the interference value between available signal cell；Structure
Index unit, for being calculated according to the interference value between available signal number of cells N, secondary carrier sum M and available signal cell
Network structure index out, the network structure index is to assess network structure.
In the device, available cell and secondary carrier unit include：Available signal cell module, for calculating each sweep
Available signal number of cells N on frequency point with the signal difference of the cell of peak signal within 6dB；Secondary carrier computing module,
For calculating the secondary carrier sum M of N number of available signal cell.
In the device, structure index unit includes：Co-channel interference value module, for available signal minizone to be arranged
Co-channel interference value include it is main with frequency, it is major-minor with frequency and it is auxiliary with frequency；A current area is selected, for each of current area
A carrier wave successively calculates the same frequency weight between the carrier wave and all carrier waves of another cell, and all same frequency weights that adds up
Another cell is obtained for the co-channel interference value of current area；Interference value correction module, for small to any one available signal
It is small to obtain available signal respectively multiplied by the scrambling code group correlation between corresponding available signal cell for the co-channel interference value in section
Interference value between area；Network structure index computing module, for being modified to secondary carrier sum M, by available signal cell
Number N, the interference value co between revised secondary carrier sum M and available signal cellsi* X carries out cumulative summation, is corresponded to
The network structure index of frequency sweep point.
Above-mentioned technical proposal of the invention has the beneficial effect that：According to small in network overlapped coverage, secondary carrier and net
The disturbing factor in section calculates network structure index and realizes quantitative analysis to network presence, network structure index more it is big then
Network structure is more complicated, and the space of optimization is bigger.
Detailed description of the invention
Fig. 1 shows a kind of method flow schematic diagrams for assessing network structure；
Fig. 2 indicates the effect schematic diagram of basic data, frequency sweep data during assessing network structure；
Fig. 3 indicates a kind of structural schematic diagram of device for assessing network structure.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention comprehensively considers network overlapped coverage, carrier wave configuration and nets interior disturbing factor, to the network presence amount of progress
Change analysis.
The embodiment of the present invention provides a kind of method for assessing network structure, as shown in Figure 1, including：
Step 101, the frequency sweep data of each frequency sweep point are obtained；
Step 102, the available signal number of cells N of each frequency sweep point, available signal cell are calculated according to frequency sweep data
Secondary carrier sum M；
Step 103, the co-channel interference value of available signal cell between any two is calculated according to secondary carrier sum, to described with frequency
Interference value is modified using scrambling code group correlation, obtains the interference value between available signal cell；
Step 104, according to the interference value meter between available signal number of cells N, secondary carrier sum M and available signal cell
Network structure index is calculated, the network structure index is to assess network structure.
It is calculated using provided technology according to network overlapped coverage, secondary carrier and the disturbing factor for netting interior minizone
Network structure index realizes the quantitative analysis to network presence out, and the more big then network structure of network structure index is more complicated, optimization
Space it is bigger.
The available signal of available signal cell (N) refers to, the letter on each frequency sweep point with peak signal difference within 6dB
Number, it is denoted as available signal.In other words, secondary carrier refers to the cell on each frequency sweep point with peak signal difference within 6dB
Secondary carrier.
As shown in Fig. 2, the basic data of TD network includes：Cell name, cell ID, longitude and latitude, frequency point scrambling code, carrier wave
Configuration and attribute etc..
On each frequency sweep point, the frequency sweep data of multiple cells can be read, frequency sweep data can really reflect that signal covers
Lid situation is coverage evaluating and the relatively reasonable measurement data source of analysis.The high-speed, high precision sweep generator provided in the industry at present
What is acquired is the key that the frequency sweep data that each frequency sweep point includes.
In a preferred embodiment, the frequency sweep data for obtaining each frequency sweep point include：
Time, a plurality of data of same time are the data of same test point；
Dominant frequency point in Channel, TD；
CPI, the scrambling code of the cell；
SYNC_DL, downlink frequency pilot code；
Latitude, the latitude of test point；
Longitude, the longitude of test point；
PCCPCH RSCP, main power control channel level；
PCCPCH C/I, main power control channel C/I；
PCCPCH TimeOffset, PCCPCH chip offset.
After reading frequency sweep data, need first to be pre-processed.Frequency sweep data are digitized using decomposition, conclusion, normalizing etc., it is raw
At the data of the reaction MPS process of pure mathematics.In a preferred embodiment, carrying out pretreatment to frequency sweep data includes：
Give up the frequency sweep data for lacking frequency point, scrambling code or longitude and latitude；
Give up the low level that can not be parsed due to the highly sensitive mobile terminal obtained of sweep generator；Wherein, due to frequency sweep
The sensitivity of instrument is higher, although the signal lower than -110dBm can be received, mobile terminal can not be parsed, to case study
Give up without any effect, therefore during importing；
Take the identical same cell of longitude and latitude in the level average of multiple periods；Wherein, it in same longitude and latitude, can test
To the signal of multiple cells multiple periods, therefore take the average level of same cell, with improve acquisition frequency sweep data efficiency and
Accuracy.
Cell is uniquely determined using frequency sweep point+scrambling code+longitude and latitude, in a preferred embodiment, reads each frequency sweep point
In frequency sweep data after further include：
The cell of frequency sweep point and scrambling code is searched in basic data；
By the cell inquired according to distance-taxis is carried out between frequency sweep point, it is that the frequency sweep point is corresponding that distance is nearest
The cell of peak signal.
The basic data of TD network includes cell name, cell ID, longitude and latitude, frequency point scrambling code, carrier wave configuration and attribute
Deng.Frequency sweep point is searched in basic data and the cell of scrambling code includes：Each longitude and latitude can test multiple frequency sweep point+scrambling codes
Cell combination, each corresponding different cell of combination needs the basic number in existing net to obtain the accurate information of cell
It is matched according to middle lookup.
For example, the information of following table can be found using frequency sweep point and scrambling code combination (10112,55)：
Since TD-SCDMA frequency point scrambling code is multiplexed, each frequency point scrambling code combination cannot uniquely determine a cell, this
It can be found out by the table that frequency sweep point and scrambling code combine (10112,55), it is therefore desirable to the distance according to cell apart from the frequency sweep point
It is ranked up, distance is recently the corresponding cell of frequency sweep point, i.e., uniquely determines cell using frequency point+scrambling code+longitude and latitude.?
In one application scenarios, frequency point scrambling code combine (10112,55), place test point longitude, dimension (120.23163,
It 29.694868) is recently with match point (120.23278,29.698333) distance, 0.4KM, therefore cell ID is 44321
Cell-Zhuji area just outside a city gate water pump works 2 is the corresponding cell of frequency sweep point.
In a preferred embodiment, the information of each frequency sweep point is concluded.On each frequency sweep point, it can read multiple small
The frequency sweep data in area calculate the cell number on each frequency sweep point with peak signal difference within the first difference threshold, are denoted as
Available signal number of cells N.Wherein, the first difference threshold value 6dB, peak signal cell when calculating co-channel interference value
It is an available signal cell, number N contains peak signal cell and other available signal cells, is summarized as follows table：
As can be seen that reading the information of 4 cells altogether on frequency sweep point, peak signal is -61.88dBm, with most strong letter
Number signal of the difference within 6dB shares 3, in tri- _ tri- curled-up dragon park T2, ZT11187_ tri- of ZT11635_ _ occupation
Special T1 and ZT11180_ tri- _ Western Hills cell T1, then available signal cell number scale is 3, such as following table：
In a preferred embodiment, be arranged available signal minizone co-channel interference value include it is main with frequency, it is major-minor same
Frequency and auxiliary same frequency；Select a current area, for each carrier wave of current area, successively calculate the carrier wave with it is another small
Same frequency weight between all carrier waves in area, and the same frequency that all same frequency weights that adds up obtain another cell for current area
Interference value.
During this, the co-channel interference value co of available signal cell (N) between any two is calculatedsi.Current area carrier wave and
Remaining cell carrier is calculated with auxiliary with three kinds of situations frequently according to main same frequency, major-minor same frequency, i.e. minizone co-channel interference
Value comprising it is main with frequency, it is major-minor with frequency and it is auxiliary with frequency three kinds；Main with frequency weight is 10, and major-minor same frequency weight is 2, auxiliary same
Frequency weight is 1, alien frequencies weight all 0.
In a preferred embodiment, the secondary carrier sum M of available signal cell (N) is calculated.By searching for basic data,
As shown in the table, this 3 available signal cells configure 10 secondary carriers altogether, are denoted as 10, and 3 available signal cells are denoted as respectively
A, B and C.All carrier waves of cell for meeting condition with remaining are gone to be polled comparing calculation respectively with current area carrier wave, respectively
Calculate the co-channel interference value of cell A, B and cell C, co-channel interference value cosiIndicate the carrier wave of i-th of cell for s-th of cell
The co-channel interference of carrier wave acts on：
coAB=(0+0+0+2+0+0+1+0+0+0+0+0+1+0+0+2+0+0+0+0+0+0+0+0+0)=6,
coAC=(10+0+0+0+1+0+0+0+1+0+0+0+0+0+0)=12,
coBC=(0+0+0+0+1+0+0+0+1+2+0+0+0+0+0)=4.
In a preferred embodiment, the scrambling code group correlation of superposition available signal cell (N) between any two.Cell A, B
Co-channel interference value between C is respectively coAB、coACAnd coBC, the scrambling code group being superimposed between cell two-by-two on this basis is related
Property X.
TD shares 128 scrambling codes, is divided into 12 scrambling code groups according to different correlations：
Different scrambling codes group correlation：
Calculate the co-channel interference value co between cell A, B and CAB、coACAnd coBCLater, it is superimposed on this basis small two-by-two
Scrambling code group correlation X between areaAB、XACOr XBC, gone out according to calculated co-channel interference value with scrambling code correlation calculations
Interference value between cell：
coAB*XAB=6*0.8125=4.875；
coAC*XAC=12*0.5625=6.75；
coBC*XBC=4*0.5625=2.25；
Wherein, scrambling code group correlation XAB、XACOr XBCPhysical significance be correlation between scrambling code.
At this point, available signal cell N has been obtained, secondary carrier sum M, the interference value co between cellsi* X, at one
In preferred embodiment, calculated according to the interference value between available signal number of cells N, secondary carrier sum M and available signal cell
Network structure index includes out：
Secondary carrier sum M is modified, by available signal number of cells N, revised secondary carrier sum M and available letter
Interference value co between number cellsi* X carries out cumulative summation, obtains the network structure index of corresponding frequency sweep point.
The cumulative read group total of these three parameters is gone out：Network structure indices P=N+0.2M+ Σ COsi* X, obtained value P is i.e.
For the network structure index of corresponding frequency sweep point, s and i are for indicating different available signal cells.The network structure of the frequency sweep point
Indices P=3+0.2*10+ (4.875+6.75+2.25)=18.875.
So far, the process for calculating network structure index (core algorithm) terminates.
The embodiment of the present invention provides a kind of device for assessing network structure, as shown in figure 3, including：
Frequency sweep data capture unit 301, for obtaining the frequency sweep data of each frequency sweep point；
Available cell and secondary carrier unit 302, for calculating the available signal cell of each frequency sweep point according to frequency sweep data
Number N, the secondary carrier sum M of available signal cell；
Value cell 303 is interfered, for calculating the co-channel interference value of available signal cell between any two, to the co-channel interference
Value is modified using scrambling code group correlation, obtains the interference value between available signal cell；
Structure index unit 304, for according to available signal number of cells N, secondary carrier sum M and available signal cell it
Between interference value calculate network structure index, the network structure index is to assess network structure.
In a preferred embodiment, available cell and secondary carrier unit 302 include：
Available signal cell module, for calculating on each frequency sweep point with the signal difference of the cell of peak signal in 6dB
Within available signal number of cells N；
Secondary carrier computing module, for calculating the secondary carrier sum M of N number of available signal cell.
In a preferred embodiment, structure index unit 304 includes：
Co-channel interference value module, for using current area carrier wave small with remaining respectively for cell A, cell B and cell C
All carrier waves in area are polled comparing calculation, obtain co-channel interference value：
coAB=(0+0+0+2+0+0+1+0+0+0+0+0+1+0+0+2+0+0+0+0+0+0+0+0+0)=6；
coAC=(10+0+0+0+1+0+0+0+1+0+0+0+0+0+0)=12；
coBC=(0+0+0+0+1+0+0+0+1+2+0+0+0+0+0)=4；
Interference value correction module includes for being superimposed the scrambling code group correlation of available signal cell between any two：
To co-channel interference value coAB、coACAnd coBCThe scrambling code group correlation X of superposition between any twoAB、XACOr XBC, obtain：
coAB*XAB=6*0.8125=4.875；
coAC*XAC=12*0.5625=6.75；
coBC*XBC=4*0.5625=2.25.
Network structure index computing module, for according to available signal number of cells N, secondary carrier sum M, interference value cosi*
X carries out cumulative summation, obtains the network structure index of corresponding frequency sweep point.
It is using the advantage after this programme：Conjoint Analysis is carried out in conjunction with frequency sweep data and basic data, comprehensively considers net
Network is overlapped coverage, carrier wave configuration and nets interior inter-cell interference three aspect factor, carries out quantitative analysis to network presence, index is got over
Greatly, it was demonstrated that network structure is more complicated, and the space of optimization is bigger, exports intuitive report, the clear network structure that shows
Loading level.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of method for assessing network structure, which is characterized in that including：
Obtain the frequency sweep data of each frequency sweep point；
The available signal number of cells N of each frequency sweep point and the secondary carrier sum M of available signal cell are calculated according to frequency sweep data；
The co-channel interference value of available signal cell between any two is calculated according to secondary carrier sum, the co-channel interference value is used and is disturbed
Code character correlation is modified, and obtains the interference value between available signal cell；
Network structure is calculated according to the interference value between available signal number of cells N, secondary carrier sum M and available signal cell
Index, the network structure index is to assess network structure.
2. the method according to claim 1, wherein the frequency sweep data for obtaining each frequency sweep point further include later：
Give up the frequency sweep data for lacking frequency sweep point, scrambling code or longitude and latitude；
Low level frequency sweep data that give up the highly sensitive acquisition based on sweep generator and that mobile terminal can not parse；
Take the identical same cell of longitude and latitude multiple periods level average as the frequency sweep data, wherein with once
Latitude, test arrive the signal of multiple cells multiple periods, level of the same cell in multiple periods are taken to make the value after average computation
As the frequency sweep data.
3. according to the method described in claim 2, it is characterized in that, further including：
Frequency sweep point is searched in basic data and generates the cell of scrambling code；
By the cell found according to the distance-taxis with frequency sweep point, distance is recently the corresponding peak signal of frequency sweep point
Cell.
4. according to the method described in claim 3, it is characterized in that, calculating the available letter on each frequency sweep point according to frequency sweep data
The secondary carrier sum M of number cell includes：
Calculate the available letter on each frequency sweep point with the signal difference of the cell of the peak signal within the first difference threshold
Number number of cells N, the available signal cell includes the cell itself of peak signal；
Calculate the secondary carrier sum M of N number of available signal cell.
5. according to the method described in claim 4, it is characterized in that, according to secondary carrier sum calculate available signal cell two-by-two it
Between co-channel interference value include：
Be arranged available signal minizone co-channel interference value include it is main with frequency, it is major-minor with frequency and it is auxiliary with frequency；
A current area is selected, for each carrier wave of current area, successively calculates all of the carrier wave and another cell
Same frequency weight between carrier wave, and the co-channel interference value that all same frequency weights that adds up obtain another cell for current area.
6. according to the method described in claim 5, it is characterized in that, being carried out to the co-channel interference value using scrambling code group correlation
Amendment, the interference value obtained between available signal cell include：
To the co-channel interference value between any one available signal cell, respectively multiplied by disturbing between corresponding available signal cell
Code character correlation obtains the interference value between available signal cell.
7. according to the method described in claim 6, it is characterized in that, according to available signal number of cells N, secondary carrier sum M and
Interference value between available signal cell calculates network structure index：
Secondary carrier sum M is modified, by available signal number of cells N, revised secondary carrier sum M and available signal are small
Interference value between area carries out cumulative summation, obtains the network structure index of corresponding frequency sweep point.
8. a kind of device for assessing network structure, which is characterized in that including：
Frequency sweep data capture unit, for obtaining the frequency sweep data of each frequency sweep point；
Available cell and secondary carrier unit, for calculated according to frequency sweep data each frequency sweep point available signal number of cells N and
The secondary carrier sum M of available signal cell；
Value cell is interfered, for calculating the co-channel interference value of available signal cell between any two, the co-channel interference value is used
Scrambling code group correlation is modified, and obtains the interference value between available signal cell；
Structure index unit, for according to dry between available signal number of cells N, secondary carrier sum M and available signal cell
It disturbs value and calculates network structure index, the network structure index is to assess network structure.
9. device according to claim 8, which is characterized in that available cell and secondary carrier unit include：
Available signal cell module, for calculating on each frequency sweep point with the signal difference of the cell of peak signal in the first difference
Available signal number of cells N within threshold value；
Secondary carrier computing module, for calculating the secondary carrier sum M of N number of available signal cell.
10. device according to claim 8, which is characterized in that structure index unit includes：
Co-channel interference value module, for be arranged available signal minizone co-channel interference value include it is main with frequency, it is major-minor with frequency and
Auxiliary same frequency；A current area is selected, for each carrier wave of current area, successively calculates the carrier wave and another cell
Same frequency weight between all carrier waves, and all same frequency weights that adds up obtain another cell for the co-channel interference of current area
Value；
Interference value correction module, for the co-channel interference value to any one available signal minizone, respectively multiplied by it is corresponding can
With the scrambling code group correlation between signal cell, the interference value between available signal cell is obtained；
Network structure index computing module, for being modified to secondary carrier sum M, by available signal number of cells N, after amendment
Secondary carrier sum M and available signal cell between interference value carry out cumulative summation, obtain the network structure of corresponding frequency sweep point
Index.
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| CN101998411A (en) * | 2010-12-10 | 2011-03-30 | 上海百林通信软件有限公司 | Sweep frequency and propagation model coverage prediction-based frequency optimization method |
| CN102232285A (en) * | 2009-12-30 | 2011-11-02 | 联发科技股份有限公司 | Measurement and carrier group based optimization in wireless OFDM multi-carrier communication systems |
| CN102970696A (en) * | 2012-12-14 | 2013-03-13 | 上海大唐移动通信设备有限公司 | Frequency optimization method for communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102232285A (en) * | 2009-12-30 | 2011-11-02 | 联发科技股份有限公司 | Measurement and carrier group based optimization in wireless OFDM multi-carrier communication systems |
| CN101998411A (en) * | 2010-12-10 | 2011-03-30 | 上海百林通信软件有限公司 | Sweep frequency and propagation model coverage prediction-based frequency optimization method |
| CN102970696A (en) * | 2012-12-14 | 2013-03-13 | 上海大唐移动通信设备有限公司 | Frequency optimization method for communication system |
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