CN101141777B - Automatic adjacent section planning method - Google Patents
Automatic adjacent section planning method Download PDFInfo
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- CN101141777B CN101141777B CN2007101295043A CN200710129504A CN101141777B CN 101141777 B CN101141777 B CN 101141777B CN 2007101295043 A CN2007101295043 A CN 2007101295043A CN 200710129504 A CN200710129504 A CN 200710129504A CN 101141777 B CN101141777 B CN 101141777B
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Abstract
A method for automatic adjacent planning. The invention comprises the following steps: 1.1. the planning parameter is input, to calculate the path loss of each cell; 1.2. the threshold value of the adjacent planning is set; 1.3. the adjacent planning of each cell is automatically accomplished according to the threshold value and the path loss; 1.4. the adjacent planning result is output. The invention integrates the characteristic of the actual system switching, fully considers the influence of topography and geographical objects to the propagation signal, and forms the credible adjacent planning result.
Description
Technical field
The invention belongs to moving communicating field, be specifically related to the method for CDMA/WCDMA (code division multiple access) wireless network automatic adjacent section planning.
Background technology
Adjacent section planning is indispensable in a CDMA/WCDMA network planning important step, and the reasonability of Neighboring Cell List setting can influence the switching between the base station.
Adjacent section planning method at present relatively more commonly used is the network topology structure that the project engineer checks the planning website, according to the distance between each sub-district, antenna towards, determine the adjacent area according to the planning experience of oneself.This artificial method occurs probably owing to the adjacent section planning result that the coverage error in judgement is caused is incorrect, and artificial method too relies on project engineer's personal experience, occur different people probably and draw different program resultses, plan manually that in addition the method for adjacent area also is easy to occur the situation that the adjacent area leakage is joined.
At present industry also has the software of some automatic adjacent section plannings, for example ZXPOS CNO1 and Enterprise Asset3G, but their defectives of existence all itself.
ZXPOS CNO1 plans the adjacent area according to the distance of minizone, and this automatic planing method is not considered the influence that landform, atural object are propagated signal, and the adjacent section planning result is inaccurate.
Enterprise Asset3G is according to the threshold value of the pilot signal strength Ec that receives as adjacent section planning, this and real system are not inconsistent, and in overloading frequency adjacent section planning, it does not have to consider the overloading adjacent with the single carrier frequency planning of the alien frequencies adjacent area of border cell frequently yet.
In " method of automatic maintenance neighborlist in a kind of cdma system " (patent No. 02110634.7) and " realizing the automatic optimization method of CDMA Neighboring Cell List " (patent No. 03131825.8) invention, a kind of method of utilizing switch data and associated gate limit value that Neighboring Cell List is optimized has all been proposed, but these two kinds of methods all are just can implement after a period of time at network opening, and are then unworkable for the network of new planning.
Summary of the invention
The objective of the invention is to solve the problem that needs the manual configuration adjacent area before the present network opening, propose a kind of method that is applicable to the automatic adjacent section planning of CDMA/WCDMA communication system.
The technical scheme that solution the technology of the present invention problem is adopted is:
A kind of method of automatic adjacent section planning may further comprise the steps:
1.1 the input projecting parameter is calculated the path loss of each sub-district;
1.2 set the adjacent section planning threshold value;
1.3 finish the adjacent section planning of each sub-district automatically according to the path loss of described adjacent section planning threshold value and described each sub-district;
1.4 output adjacent section planning result.
Further, the projecting parameter of input comprises power parameter, antenna-feed parameter and the propagation model of each sub-district in 1.1.
Further, the power parameter of each sub-district of input comprises pilot tone, synchronously and the transmitting power of three overhead channels of paging at least in 1.1.
Further, the propagation model according to input calculates the path loss of each sub-district in 1.1.
Further, the adjacent section planning threshold value of setting in 1.2 comprises pilot tone signal to noise ratio EcIo threshold value, the adjacent area number upper limit, adjacent area, the critical sub-district number upper limit at least.
Further,, carry out the adjacent section planning of basic carrier frequency earlier, finish the adjacent section planning under other carrier frequency then if overloading is frequently during adjacent section planning in 1.3.
Further, also comprise in 1.3:
7.1 generate the strongest pilot tone coverage diagram of each sub-district according to pilot power, path loss;
7.2 select one of them sub-district, judge that whether current carrier frequency is basic carrier frequency, if not, then carries out 7.4; Otherwise carry out next step;
7.3 whether be critical sub-district, if then carry out 7.7 if judging described sub-district; Otherwise carry out next step;
7.4 in the strongest pilot tone overlay area, described sub-district, add up the candidate adjacent set of this sub-district;
7.5 sorted according to overlapping covering Bin lattice number order from big to small in the sub-district in the described candidate adjacent set;
7.6 finish the adjacent section planning of described sub-district, carry out 7.8;
7.7 finish the adjacent section planning of critical sub-district, carry out next step;
7.8 judging whether all sub-districts plan finishes, and if not, then returns and carries out 7.2; Otherwise flow process finishes.
Further, also comprise in 7.4:
8.1 add up the Bin lattice number in the strongest pilot tone area coverage in described sub-district;
8.2 calculate the pilot tone signal to noise ratio EcIo of other sub-district outside the described sub-district that receives in the Bin lattice;
Whether satisfy the threshold value that the user sets 8.3 judge the EcIo that calculates, if then be the candidate adjacent of described sub-district with this plot planning;
8.4 repeat 8.2 and 8.3, finish until all Bin lattice calculating;
8.5 count the candidate adjacent set of described sub-district.
Further, also comprise and read adjacent area number upper limit N that the top n plot planning is the adjacent area of described sub-district in the described candidate adjacent set after then will sorting in 7.6.
Further, comprise again in 7.7:
10.1 obtain each input parameter: adjacent area, the critical sub-district number upper limit; The carrier frequency number of critical sub-district; The adjacent area set of critical sub-district under basic carrier frequency.
10.2 from the set of described adjacent area, select a sub-district according to overlapping covering Bin lattice number order from big to small, whether the carrier frequency number of judging described sub-district is less than the carrier frequency number of described critical sub-district, if then described sub-district is the adjacent area of critical sub-district, carries out next step; Otherwise carry out 10.4.
10.3 the adjacent area number of critical sub-district adds 1, judges whether to reach adjacent area, the described critical sub-district number upper limit, if reach, then flow process finishes; Otherwise carry out next step.
10.4 judging whether sub-district in the set of described adjacent area travels through finishes, and if not, then returns and carries out 10.2; Otherwise flow process finishes.
Compare with existing automatic adjacent section planning method, the present invention has 2 big advantages:
1, utilizes the threshold value of pilot tone signal to noise ratio EcIo as adjacent section planning, more realistic system.
2, considered the adjacent section planning method that critical sub-district is special in the adjacent section planning frequently in overloading.
The present invention is in conjunction with the characteristics that real system switches, and taken into full account the influence to transmitting signal of landform, atural object, can provide believable adjacent section planning result.
Description of drawings
Fig. 1 is the basic flow sheet of automatic adjacent section planning;
Fig. 2 is the flow chart that plan automatically the adjacent area under each carrier frequency;
Fig. 3 is the flow chart of critical sub-district adjacent section planning.
Embodiment
Below in conjunction with accompanying drawing, further elaboration technical scheme of the present invention.
Referring to Fig. 1, be the basic flow sheet of automatic adjacent section planning, comprise following basic step:
11, import projecting parameter, comprise power parameter, antenna-feed parameter and the propagation model of each sub-district, calculate the path loss of each sub-district according to propagation model; Power parameter comprise at least pilot tone, synchronously, the transmitting power of three overhead channels of paging.
12, set the adjacent section planning threshold value.The adjacent section planning threshold value comprises three at least: pilot tone signal to noise ratio EcIo threshold value, the adjacent area number upper limit, adjacent area, the critical sub-district number upper limit.Critical sub-district itself is the overloading frequency, and is that adjacent base station is single carrier cell or the few sub-district of carrier frequency number of carrying the critical sub-district of frequency ratio self; The adjacent section planning method of critical sub-district is different with non-critical sub-district on non-basic carrier frequency.
13, obtain certain carrier frequency C
i
14, plan the adjacent area of all sub-districts under this carrier frequency automatically.If overloading frequency adjacent section planning, the adjacent area of planning basic carrier frequency earlier, adjacent section planning herein comprises the adjacent section planning of non-critical sub-district and critical sub-district.
15, judge whether all carrier frequency travel through and finish,, then return and carry out 13 if do not have; Otherwise carry out next step.
16, output adjacent section planning result.
Referring to Fig. 2, the flow chart for plan automatically adjacent area under each carrier frequency may further comprise the steps:
21, generate the strongest pilot tone coverage diagram of each sub-district according to pilot power, path loss.The strongest pilot tone coverage diagram of certain sub-district is by the strong waveguide frequency signal intensity of all receptions pixel groups for this district pilots intensity.
22, select a cell i.
23, judge i district current carrier frequency C
iWhether be basic carrier frequency, if not, then carry out 26; Otherwise carry out next step.
24, judge that whether the i sub-district is critical sub-district, if not, then carries out 26; Otherwise carry out next step.
25, finish the adjacent section planning of critical sub-district, carry out 29.
26, in the strongest pilot tone overlay area, i sub-district, add up the candidate adjacent set Q of this sub-district.
1) at first adds up the interior Bin lattice number of the strongest pilot tone area coverage in i sub-district;
2) the pilot tone EcIo signal to noise ratio of other sub-district outside the i sub-district that calculating receives in Bin lattice;
3) judge whether the EcIo that calculates satisfies the threshold value that the user sets, if then be the candidate adjacent of i sub-district with this plot planning;
4) repeat 2)～3) finish until all Bin lattice calculating.
27, sort according to overlapping covering Bin lattice number order from big to small in the sub-district of candidate adjacent being gathered among the Q.Overlapping covering is meant that the EcIo of another sub-district k on these Bin lattice also satisfies threshold value if the i sub-district is the strongest Serving cell on a certain Bin lattice, i sub-district and the k sub-district covering that overlaps on these Bin lattice so; All Bin lattice in the strongest pilot tone coverage in traversal i sub-district can be added up the Bin lattice sum that each candidate adjacent of i sub-district and i sub-district overlap and cover.
28, finish the adjacent section planning of i sub-district, read adjacent area number upper limit N, the top n plot planning is the adjacent area of i sub-district among the set Q after then will sorting, and carries out 29.
29, judge whether that all plot plannings finish, if not, then return and carry out 22; Otherwise flow process finishes.
Referring to Fig. 3, the flow chart for critical sub-district adjacent section planning may further comprise the steps:
31, obtain each input parameter, specifically comprise: critical cell i adjacent area number upper limit N
CriticalThe carrier frequency of critical cell i is counted CarrierNum; The adjacent area set V of critical cell i under basic carrier frequency.
32, from V, select a sub-district j according to overlapping covering Bin lattice number order from big to small.
33, whether the carrier frequency number of judging sub-district j is less than CarrierNum, if then carry out next step; Otherwise carry out 37.
34, the j sub-district is the adjacent area of critical cell i sub-district, carries out next step.
35, the adjacent area number with critical cell i adds 1, carries out next step.
36, judge whether to reach thresholding N
CriticalIf, reach, then flow process finishes; Otherwise carry out next step.
37, judge whether sub-district among the V travels through and finish, if not, then return and carry out 32; Otherwise flow process finishes.
Be example with certain zone network adjacent section planning below, further introduce technical scheme of the present invention.
The website that participates in adjacent section planning has 30, and totally 90 sub-districts wherein have 30 to be single carrier cell, and 60 is two carrier cells; In 60 two carrier cells, there are 30 to be critical sub-district.
The first step: at first be these 90 cell allocation propagation models, and the calculating path loss.
Second step: set the adjacent section planning threshold value, wherein:
Carrier frequency adjacent area EcIo threshold value=-15dB;
Maximum carrier frequency adjacent area number=20;
Maximum critical cell carrier frequencies adjacent area number=4.
The 3rd step: the adjacent section planning of finishing following 90 sub-districts of basic carrier frequency.
1) calculates the strongest pilot tone overlay area of these 90 sub-districts;
2) from 90 sub-districts, select a sub-district successively, be made as the i sub-district, calculate the EcIo intensity of other sub-district in the strongest pilot tone coverage in i sub-district;
3) will satisfy EcIo＞=-sub-district of 15dB is assigned as the candidate adjacent of i sub-district;
4) with all candidate adjacent according to overlapping covering Bin lattice number rank order from big to small;
5) the basic carrier frequency adjacent area that is the i sub-district of preceding 20 plot plannings after will sorting;
6) repeat 2)～5) finish until 90 plot plannings.
The 4th step: the adjacent section planning of finishing following 30 the non-critical sub-districts of second carrier frequency.
1) calculates the strongest pilot tone overlay area of these 30 sub-districts;
2) from 30 sub-districts, select a sub-district successively, be made as the i sub-district, calculate the EcIo intensity of other sub-district in the strongest pilot tone coverage in i sub-district;
3) will satisfy EcIo＞=-sub-district of 15dB is assigned as the candidate adjacent of i sub-district;
4) with all candidate adjacent according to overlapping covering Bin lattice number rank order from big to small;
5) the basic carrier frequency adjacent area that is the i sub-district of preceding 20 plot plannings after will sorting;
6) repeat 2)～5) finish until 30 plot plannings.
The 5th step: the adjacent section planning of finishing following 30 the critical sub-districts of second carrier frequency.
1) from 30 sub-districts, selects a cell i, and obtain the basic carrier frequency adjacent area of this sub-district;
2) from basic carrier frequency adjacent area, select sub-district j;
3) judge whether the j sub-district is single carrier cell, if then be planned to the adjacent area of i sub-district;
4) repeat 2) and 3) until finding 4 adjacent areas or i sub-district basic carrier frequency adjacent area traversal to finish;
5) repeat 1)～4) finish until all 30 critical plot plannings;
The 6th step: output adjacent section planning result, finish adjacent section planning.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. the method for an automatic adjacent section planning is characterized in that, may further comprise the steps:
1.1 the input projecting parameter is calculated the path loss of each sub-district;
1.2 set the adjacent section planning threshold value;
1.3 finish the adjacent section planning of each sub-district automatically according to the path loss of described adjacent section planning threshold value and described each sub-district;
1.4 output adjacent section planning result.
2. the method for a kind of automatic adjacent section planning as claimed in claim 1 is characterized in that, the projecting parameter of input comprises power parameter, antenna-feed parameter and the propagation model of each sub-district in the step 1.1.
3. the method for a kind of automatic adjacent section planning as claimed in claim 2 is characterized in that, the power parameter of each sub-district of input comprises pilot tone, synchronously and the transmitting power of three overhead channels of paging at least in the step 1.1.
4. the method for a kind of automatic adjacent section planning as claimed in claim 2 is characterized in that, the propagation model according to input in the step 1.1 calculates the path loss of each sub-district.
5. as the method for claim 1 or 3 described a kind of automatic adjacent section plannings, it is characterized in that in the step 1.2, described adjacent section planning threshold value comprises pilot tone signal to noise ratio EcIo threshold value, the adjacent area number upper limit, adjacent area, the critical sub-district number upper limit at least.
6. the method for a kind of automatic adjacent section planning as claimed in claim 5 is characterized in that, if overloading is frequently during adjacent section planning in the step 1.3, carries out the adjacent section planning of basic carrier frequency earlier, finishes the adjacent section planning under other carrier frequency then.
7. the method for a kind of automatic adjacent section planning as claimed in claim 5 is characterized in that, step 1.3 also comprises:
7.1 generate the strongest pilot tone coverage diagram of each sub-district according to pilot power, path loss;
7.2 select one of them sub-district, judge that whether current carrier frequency is basic carrier frequency, if not, then carries out 7.4; Otherwise carry out next step;
7.3 whether be critical sub-district, if then carry out 7.7 if judging described sub-district; Otherwise carry out next step;
7.4 in the strongest pilot tone overlay area, described sub-district, add up the candidate adjacent set of this sub-district;
7.5 sorted according to overlapping covering Bin lattice number order from big to small in the sub-district in the described candidate adjacent set;
7.6 finish the adjacent section planning of described sub-district, carry out 7.8;
7.7 finish the adjacent section planning of critical sub-district, carry out next step;
7.8 judging whether all sub-districts plan finishes, and if not, then returns and carries out 7.2; Otherwise flow process finishes.
8. the method for a kind of automatic adjacent section planning as claimed in claim 7 is characterized in that, step 7.4 also comprises:
8.1 add up the Bin lattice number in the strongest pilot tone area coverage in described sub-district;
8.2 calculate the pilot tone signal to noise ratio EcIo of other sub-district outside the described sub-district that receives in the Bin lattice;
Whether satisfy the threshold value that the user sets 8.3 judge the EcIo that calculates, if then be the candidate adjacent of described sub-district with this plot planning;
8.4 repeat 8.2 and 8.3, finish until all Bin lattice calculating;
8.5 count the candidate adjacent set of described sub-district.
9. the method for a kind of automatic adjacent section planning as claimed in claim 7 is characterized in that, comprises in the step 7.6, reads adjacent area number upper limit N, and the top n plot planning is the adjacent area of described sub-district in the described candidate adjacent set after then will sorting.
10. the method for a kind of automatic adjacent section planning as claimed in claim 7 is characterized in that, also comprises in the step 7.7:
10.1 obtain each input parameter: adjacent area, the critical sub-district number upper limit; The carrier frequency number of critical sub-district; The adjacent area set of critical sub-district under basic carrier frequency;
10.2 from the set of described adjacent area, select a sub-district according to overlapping covering Bin lattice number order from big to small, whether the carrier frequency number of judging described sub-district is less than the carrier frequency number of described critical sub-district, if then described sub-district is the adjacent area of critical sub-district, carries out next step; Otherwise carry out 10.4;
10.3 the adjacent area number of critical sub-district adds 1, judges whether to reach adjacent area, the described critical sub-district number upper limit, if reach, then flow process finishes; Otherwise carry out next step;
10.4 judging whether sub-district in the set of described adjacent area travels through finishes, and if not, then returns and carries out 10.2; Otherwise flow process finishes.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101076178B (en) * | 2007-07-19 | 2010-06-09 | 华为技术有限公司 | Method and apparatus for planning adjacent domain |
| CN102036214B (en) * | 2009-09-29 | 2013-03-06 | 中国移动通信集团江苏有限公司 | Method and device for determining neighboring cell relationship |
| CN102413499B (en) * | 2010-09-20 | 2014-09-10 | 大唐移动通信设备有限公司 | Simulation method for inter-cell interference coordination, and device therefor |
| CN102413477B (en) * | 2010-09-20 | 2014-06-04 | 大唐移动通信设备有限公司 | Simulation method for inter-cell interference coordination, and device therefor |
| CN102655661B (en) * | 2011-03-03 | 2016-01-20 | 中兴通讯股份有限公司 | The method that community switches fast and device |
| CN102325333B (en) * | 2011-07-20 | 2013-12-04 | 厦门大学 | Indoor neighbor cell coverage planning method of multi-storey building based on radio frequency remote system |
| CN107343282B (en) * | 2016-04-29 | 2019-12-06 | 中国电信股份有限公司 | method, device and communication system for judging boundary cell |
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| US6125280A (en) * | 1998-03-19 | 2000-09-26 | Lucent Technologies Inc. | Automatic neighbor identification in a cellular system |
| CN1413035A (en) * | 2001-10-12 | 2003-04-23 | 上海大唐移动通信设备有限公司 | Optimized selection method for distributing intermediate frequency point of frequency |
| CN1553609A (en) * | 2003-06-05 | 2004-12-08 | 中兴通讯股份有限公司 | Automatic optimizing method for realizing CDMA neighbouring region listing |
| CN1710983A (en) * | 2004-06-18 | 2005-12-21 | 华为技术有限公司 | Heterofrequency blind switch-over method in WCDMA system |
| EP1784031A1 (en) * | 2005-11-04 | 2007-05-09 | Alcatel Lucent | Assignment of restricted power frequencies for improving intercell interferences |
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- 2007-06-26 CN CN2007101295043A patent/CN101141777B/en not_active Expired - Fee Related
Patent Citations (5)
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| US6125280A (en) * | 1998-03-19 | 2000-09-26 | Lucent Technologies Inc. | Automatic neighbor identification in a cellular system |
| CN1413035A (en) * | 2001-10-12 | 2003-04-23 | 上海大唐移动通信设备有限公司 | Optimized selection method for distributing intermediate frequency point of frequency |
| CN1553609A (en) * | 2003-06-05 | 2004-12-08 | 中兴通讯股份有限公司 | Automatic optimizing method for realizing CDMA neighbouring region listing |
| CN1710983A (en) * | 2004-06-18 | 2005-12-21 | 华为技术有限公司 | Heterofrequency blind switch-over method in WCDMA system |
| EP1784031A1 (en) * | 2005-11-04 | 2007-05-09 | Alcatel Lucent | Assignment of restricted power frequencies for improving intercell interferences |
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