CN1413035A - Optimized selection method for distributing intermediate frequency point of frequency - Google Patents
Optimized selection method for distributing intermediate frequency point of frequency Download PDFInfo
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Abstract
The optimization selection method of frequency point in the frequency distribution includes the following steps: 1) defining small zone of frequency ponit to be configurated and giving out related data for selecting required frequency; 2). making initialization, censusing performance value of available freqency points, assigning initial value and giving out unified standard; 3). calculating interference value of every available frequency point; and 4). selecting optimum frequency point, using the frequency point with smallest interference value as frequency point of current small zone, and said frequency point can produce smallest interference the oretically in the small one.
Description
Invention field
The invention belongs to moving communicating field, relate in particular to, a kind of optimized selection method of Frequency Distribution intermediate-frequeney point.
Technical background
Along with mobile subscriber's quick increase, the mobile communications network of each place is also constantly being built and dilatation.The planning of frequency resource is an important link in the planning of mobile communications network, if frequency planning got bad when network was carried out integrated planning, can cause whole network to build up or dilatation after some performance index poor, as adjacent cell allocation identical carrier frequency, the user just may be subjected to the interference of neighbor cell on same carrier frequency therein in sub-district during conversation, cause the relatively poor situation of the better quality of reception of incoming level, can cause call drop when serious.
In the engineering of carrying out wireless network planning and optimization, often need one can artificial actual network operation situation software as instrument, can be in this emulation tool according to everywhere the size of field intensity value in the position prediction overlay area of base station in the planning zone, can analyze the neighbouring relations of each sub-district according to prediction result, the size that can disturb according to the frequency Allocation Analysis of each sub-district, can predict the quality of the quality of reception, can proofread and correct predicted value so that its result is more realistic according to the field intensity value of actual measurement.
The method of operable frequency planning is ever-changing in carrying out the GSM frequency planning and optimizing, only the multiplex mode of frequency just has Packet Multiplexing (to comprise: 1*3,2*3,3*3,4*3,5*3,7*1, the Packet Multiplexing mode of 7*3), dynamic multiplexing, multiple frequency multiplexing (MRP), Intelligent Multi layer channeling or the like, various multiplex modes all have its advantage and limitation, can select the different frequency plannings or the method for optimization for use according to the station layout of different regions.Select which type of frequency multiplexing mode all can run into the problem how frequency distributes, for some specific sub-districts, should select which frequency just to make issuable interference minimum is the problem of frequency planning and optimization personnel research always.
In existing technology about frequency point allocation, the research of Packet Multiplexing mode aspect to the exploitation frequency is many, and also few for how selecting certain best frequency point allocation to the research data of designated cell aspect, only know that the principle that frequency is selected is to select one to make its issuable interference minimum.In the wireless network of reality, all there is the overlay area of its reality each sub-district, covering radius in the urban district is smaller, and the covering radius in suburb is bigger, in general because the path loss in the wireless transmission process, signal can reduce along with the increase of transmission range, all there is signal to cover and a bit might have a plurality of sub-districts for interior certain in planning zone, the intensity of signal may be different, when if the signal of these a plurality of sub-districts uses identical frequency range, will cause interference each other, co-channel interference that Here it is; When if the signal of these a plurality of sub-districts uses adjacent frequency range, because the skew that may exist in the frequency process of transmitting also is to cause interference very easily, adjacent interference frequently that Here it is.Carrying out to make these two kinds of interference reduce to minimum exactly when frequency is selected as far as possible.
Summary of the invention
To achieve these goals, the present invention has adopted following steps,
1) determines the sub-district of frequency to be configured and provide frequency and select required related data;
2) carry out initialization, need the performance number of available frequency is added up, initialize also provides unified standard;
3) calculate the jamming performance value of each available frequency;
4) carry out the selection of best frequency, after above whole statistics were finished, the performance number of more available frequency was got the frequency of a frequency of performance number minimum as current area, and the issuable interference on this sub-district of this frequency is minimum in theory.
Description of drawings
Below, with reference to accompanying drawing, for those skilled in the art that, from the detailed description to the inventive method, above-mentioned and other purposes of the present invention, feature and advantage will be apparent.
Fig. 1 is the flow chart of preferred embodiment of the present invention;
Fig. 2 is the schematic diagram that the preferred embodiment of 5 base stations is arranged in the scope to be planned;
Fig. 3 is a sub-district coverage diagram embodiment illustrated in fig. 2;
Fig. 4 provide embodiment illustrated in fig. 2 in 33 sub-district field intensity maps;
Fig. 5 provide embodiment illustrated in fig. 2 in 13 sub-district field intensity maps;
Fig. 6 provide embodiment illustrated in fig. 2 in 23 sub-district field intensity maps;
Fig. 7 provide embodiment illustrated in fig. 2 in the field intensity map of 43 sub-districts;
Fig. 8 provides according to the inventive method and is applied to the pairing adjacent together interference figure frequently of frequency point allocation scheme that a practical engineering calculation is come out.
Embodiment
According to above-mentioned explanation, setting different weights according to different cell neighboring relations is content of the present invention with the method for determining frequency priority, this method is at first calculated the performance number of each available frequency at different districts, analyze the priority of each available frequency again, to determine of the frequency configuration of a best frequency as current area, the frequency selection principle of the realistic network operation has obtained using preferably in practice, and following mask body is introduced this distribution method.
At first in field intensity prediction, can calculate the covering radius of each sub-district and the field intensity value of each point in the overlay area, for each the point, field intensity value to all coverage cell is carried out record greater than the sub-district of the minimum incoming level of mobile phone, select wherein to cover the Serving cell of the strongest sub-district of field intensity, and just gather as the interference adjacent area of Serving cell other sub-district as current point.After counting the overlay area as Serving cell of each sub-district, can count sub-district adjacent on covering according to the overlay area of sub-district as covering the adjacent area set, so far, main neighboring BS relationship statistics is finished.
Secondly calculate the performance number of frequency to determine its priority according to above statistics.When being carried out frequency point allocation, certain sub-district guarantees as far as possible that these sub-districts that may cause interference do not distribute identical or adjacent frequency, we determine the priority of each frequency according to this principle, high more this frequency point allocation that just illustrates of the priority of frequency is more little in the issuable interference in certain sub-district, issuable interference is different to different frequency point allocation in different sub-districts, so will carry out the arrangement of priority at different districts for the distribution of frequency.
See also Fig. 1, what this method illustrated is the method (setting the performance number base unit is λ) that the priority of certain optional frequency in sub-district is determined in a kind of requirement according to adjacent area and network system,
In the step 103, in algorithm, also must embody with the size of performance number, concrete steps are, obtain other the frequency that has been configured of current area, the performance number of these frequency correspondences is increased λ, the performance number of the adjacent up and down frequency points corresponding frequently of these frequencies is increased λ/2 ± λ/4, will increase λ/4 ± λ/8 less than the performance number of the frequency of the desired minimum carrier frequency separation of system with the carrier frequency separation of the current frequency that has been configured;
In the frequency selection course of reality, can also rule of thumb the weights under the various situations be carried out modification a little, the statistics of performance number may be not necessarily in strict accordance with above ratio, and still the value of the performance number size of frequency should be according to above big or small trend under the different neighboring BS relationship.
As shown in Figure 2,5 base stations are arranged in the current Extent of Studies, there are three sectors each base station, so total sub-district is 15 in the planning region, be numbered 11,12,13,21,22 respectively, 23.....51,52,53, cell number in last 1,2,3 expression same base, the front 1,2...5 represents base station numbering, the sub-district code name is 11 o'clock, be numbered 12,13 with it with the base station different districts, the location map of five sub-districts can find that the layout of base station is tightr as shown in Figure 2.The scope of available frequency is from 101 to 120, totally 20 frequencies, and the minimum frequency of same cells is spaced apart 2, the sub-district that needs now to distribute is 33, i.e. the 3rd sector of No. 3 base stations, the sub-district that shows with circle among the figure, existing with the existing frequency configuration in each sub-district as table 1.Should distribute two frequencies in 33 sub-districts, distribute a frequency 102 now, need calculating to obtain second frequency of best in 101 to 120 a frequency point ranges frequency as 33 sub-districts.
Table 1 provides the subdistrict frequency point allocation list.
| Cell | Frequency | 1 | Frequency 2 | Frequency 3 |
| ????11 | ????101 | ????117 | ||
| ????12 | ????104 | ????107 | ??112 | |
| ????13 | ????110 | ????115 | ??120 | |
| ????21 | ????116 | ????119 | ||
| ????22 | ????111 | ????114 | ||
| ????23 | ????103 | ????106 | ??110 | |
| ????31 | ????117 | ????112 | ||
| ????32 | ????114 | ????120 | ??110 | |
| ????33 | ????102 | ????？ |
| ????41 | ????109 | ????119 | |
| ????42 | ????105 | ????108 | |
| ????43 | ????101 | ????116 | ????118 |
| ????51 | ????103 | ????113 | |
| ????52 | ????101 | ????107 | |
| ????53 | ????115 | ????119 |
The coverage diagram that can find the sub-district according to the result of field intensity analysis as shown in Figure 3, the affiliated subdistrict that coverage diagram is added up maximum covering field intensity on each grid point is the coverage cell of current grid point, the coverage of each sub-district also comes out in this way, the grid point that will belong to same cells is with identical color showing, shows in figure according to the principle of neighbor cell different colours.The covering neighboring BS relationship of each sub-district as can be seen from the coverage diagram, at the coverage condition of 33 sub-districts as can be seen, the zone of 33 sub-districts on coverage diagram is middle a-quadrant, and the adjacent area in the covering has 31 sub-districts in G district, 32 sub-districts in F district, 22 sub-districts in B district, 12 sub-districts in C district, 41 sub-districts in E district and 51 sub-districts in D district significantly.If covering adjacent area frequency point allocation in real network bad is very easily to produce interference, so should think better of when calculating the frequency performance number.
Though the adjacent sub-district of these several coverings as can be seen from the coverage diagram of sub-district, and in fact be not equal to are the adjacent areas that possible produce interference with regard to these sub-districts.The field intensity area coverage of each sub-district is bigger in fact, is the field intensity coverage diagram of 33 sub-districts as shown in Figure 4.The darkest zone of color is the field intensity value greater than the zone of-76dB, and such field intensity value is enough to other sub-district is all produced interference, slightly Qian Se zone be the field intensity value between-85 and-field intensity value between the 76dB, such field intensity value also can cause interference.The field strength range of 33 sub-districts is very far away as can be seen.
The field strength pattern of same comparison diagram 5, Fig. 6,13,23,43 sub-districts shown in Figure 7 can find out significantly that 33 sub-districts are except the covering adjacent area that influence was found just now, also can influence 13,23,43 sub-districts, the darkest zone of color obviously superposes with the darkest zone of the color shown in Fig. 4 among each figure, these several sub-districts just are called interfered cell, whether adjacently promptly no matter cover, actual conditions all might produce the sub-district of interference, should comprise except covering the non-covering adjacent area that the adjacent area also might be disturbed.
Analysis is finished the performance number that just can carry out each frequency after the above neighboring BS relationship and has been added up.At first the performance number with all frequencies is initialized as 0.Performance number according to each frequency of order computation of the calculated performance value of introducing above: we need give second frequency of 33 cell allocation, because on 33 sub-districts, distributed a frequency 102, so the performance number of 102 correspondences just should increase by 512,102 adjacent up and down 101 and 103 performance number frequently just should increase by 256, because the minimum frequency of network requirement same cells is spaced apart 2, so with 102 frequencies at interval the performance number of 100 and 104 frequencies of 2 frequencies just should increase by 128, because frequency 100 does not belong to usable range, so just needn't consider its performance number, this is for the consideration with other frequency of sub-district; With 33 sub-districts be 31,32 and 33 sub-districts with the sub-district of base station, the performance number of the configuration frequency 117,112 on 31 sub-districts and configuration frequency 114,120,110 on 32 sub-districts and 102 correspondences on 33 sub-districts all should increase by 64, the corresponding adjacent up and down performance number of 116,118,111,113,113,115,119,109,111,101,103 correspondences frequently should increase by 32, and this is the frequency performance number calculating with the base station different districts; The covering adjacent area of 33 sub-districts is 31,32,22,12,41 and 51, and disturbing the adjacent area is 31,32,22,12,41,51,13,23 and 43, and the increase of its respective performances value by that analogy.After the performance number statistics of neighboring BS relationship is finished, also will add up the access times of each frequency at last, each frequency whenever was used once just corresponding its performance number 1 that increases.
Frequency performance number after table 2 provides by statistics.
| Frequency | Performance number | Frequency | Performance number | Frequency | Performance number |
| ????101 | ?295 | ????108 | ??21 | ????115 | ??60 |
| ????102 | ?591 | ????109 | ??67 | ????116 | ??50 |
| ????103 | ?324 | ????110 | ??115 | ????117 | ??100 |
| ????104 | ?161 | ????111 | ??111 | ????118 | ??57 |
| ????105 | ?13 | ????112 | ??126 | ????119 | ??69 |
| ????106 | ?15 | ????113 | ??125 | ????120 | ??100 |
| ????107 | ?24 | ????114 | ??118 |
Performance number minimum that can 105 frequencies from table 2 that is to say that its priority is the highest, then selects 105 second frequencies configuration as 33 sub-districts under the current state.Equate that their priority is also just identical if calculate the performance number that has a plurality of frequencies, then get of the frequency configuration of a frequency at random as current area.
Fig. 8 is applied to the pairing adjacent together interference figure frequently of frequency point allocation scheme that a practical engineering calculation is come out according to above method, Fig. 8 (a) is the co-channel interference coverage diagram, Fig. 8 (b) is the adjacent coverage diagram that frequently disturbs, the this area has 48 base stations, 142 sub-districts, the maximum configured of base station is 6/6/6 site type, have 83 available frequency resources, minimum frequency with the sub-district is spaced apart 2, after planning relatively repeatedly, determined a cover frequency allocation plan at last, its with adjacent interference profile frequently as shown in the figure, the result of optimization has obtained higher evaluation after practical application.The dark more corresponding interference value of region representation of color is big more among the figure, white portion is represented not disturb, co-channel interference begins to calculate for the maximum interference thresholding from 3dB, every 3dB is a grade, totally four grades, the adjacent interference frequently begins to calculate for the maximum interference thresholding from 9dB, also is to be a grade every 3dB, totally four grades.At the frequency resource-constrained, the base station site type is bigger as can be seen, and station layout has obtained to join preferably yupin effect than the zone of comparatively dense, and the zone of co-channel interference has only a very little part, and the darkest zone of color is very little, the adjacent interference frequently relatively with big frequently.The interference of its each sub-district and total interference statistics are as shown in table 1.
Each sub-district of table 1 and total interference statistics form
| ??1 | ??1 | ??0.00％ | ??26.85％ | ??26.85％ |
| ??1 | ??2 | ??0.00％ | ??27.78％ | ??27.78％ |
| ??1 | ??3 | ??0.00％ | ??6.85％ | ??6.85％ |
| ??2 | ??1 | ??0.00％ | ??35.24％ | ??35.24％ |
| ??2 | ??2 | ??0.00％ | ??24.29％ | ??24.29％ |
| ??2 | ??3 | ??0.00％ | ??48.48％ | ??48.48％ |
| ??3 | ??1 | ??8.70％ | ??93.83％ | ??95.04％ |
| ??3 | ??2 | ??0.00％ | ??23.47％ | ??23.47％ |
| ??3 | ??3 | ??0.00％ | ??5.00％ | ??5.00％ |
| ??4 | ??1 | ??0.00％ | ??10.75％ | ??10.75％ |
| ??4 | ??2 | ??0.60％ | ??19.22％ | ??19.82％ |
| ??4 | ??3 | ??31.67％ | ??0.83％ | ??32.50％ |
| ??… | ??… | ??… | ??… | ??… |
| ??47 | ??1 | ??0.00％ | ??6.67％ | ??6.67％ |
| ????47 | ????2 | ????0.00％ | ????1.72％ | ????1.72％ |
| ????47 | ????3 | ????6.52％ | ????8.70％ | ????15.22％ |
| ????48 | ????1 | ????0.00％ | ????1.52％ | ????1.52％ |
| ????48 | ????2 | ????0.00％ | ????39.13％ | ????39.13％ |
| ????48 | ????3 | ????27.45％ | ????1.96％ | ????27.45％ |
| Amount to | ????0.67％ | ????14.94％ | ????15.31％ |
The front provides the description to preferred embodiment, so that any technical staff in this area can use or utilize the present invention.Various modifications to these embodiment are conspicuous to those skilled in the art, can be applied to other embodiment to total principle described here and not use creativeness.Thereby, the embodiment shown in the present invention will be not limited to here, and the wide region of principle that should disclose and new feature according to meeting here.
Claims (6)
1, a kind of optimized selection method of Frequency Distribution intermediate-frequeney point, this method may further comprise the steps,
1) determines the sub-district of frequency to be configured and provide frequency and select required related data;
2) carry out initialization, need the performance number of available frequency is added up, initialize also provides unified standard;
3) the configuration frequency of other sub-districts of the frequency that has disposed according to sub-district to be configured, same base, cover the adjacent area and disturb configuration frequency, the frequency access times of adjacent area, calculate the jamming performance value of each available frequency;
4) carry out the selection of best frequency, after above whole statistics were finished, the performance number of more available frequency was got the frequency of a frequency of performance number minimum as current area, and the issuable interference on this sub-district of this frequency is minimum in theory.
2, method according to claim 1 is characterized in that, described frequency selects required related data to comprise the adjacent cell relation information of base station information, available frequency point ranges, frequency configuration information, each sub-district.
3, method according to claim 2 is characterized in that step 3) the frequency configuration of described sub-district to be configured further comprise three kinds of situations:
1 ') with the restriction of frequency, adjacent frequency and minimum carrier frequency separation, the performance number of the existing frequency of then pending frequency allocating cell will increase λ;
2 ') added value of adjacent performance number frequently up and down of existing frequency satisfies λ/2 ± λ/4;
3 ') satisfy λ/4 ± λ/8 with the be separated by added value of performance number of the frequency within the minimum carrier frequency separation of existing frequency.
4, method according to claim 3 is characterized in that step 3) described in computational process comprise:
1 ") can analyze the adjacent area, same base station of sub-district to be configured from base station information, for the frequency of configuration with the adjacent area, base station, the added value of its performance number satisfies λ/8 ± λ/16;
2 ") frequently adjacent up and down for the existing frequency of adjacent area, base station, the added value of its performance number satisfies λ/16 ± λ/32.
5, method according to claim 4 is characterized in that step 3) described in computational process further comprise:
1 ) go out the covering adjacent area of sub-district to be configured from the covering analyzing of sub-district, for the frequency of configuration that covers the adjacent area, the added value of its performance number satisfies λ/32 ± λ/64, existing frequency frequently adjacent up and down, and the added value of its performance number satisfies λ/64 ± λ/128;
2 ) adding up to the performance number that disturbs the neighbor cell configuration frequency: the interference adjacent area that can seek out sub-district to be configured from the field intensity covering analyzing of sub-district, for the frequency of configuration that disturbs the adjacent area, the added value of its performance number satisfies λ/128 ± λ/256, for disposing the frequently adjacent up and down of frequency, the added value of its performance number satisfies λ/256 ± λ/512;
3 ) different access times are to the influence of performance number: in whole network the every use of certain frequency once, its performance number is with regard to corresponding increase λ/512 ± λ/1024.
6, according to claim 3 or 4 or 5 described methods, it is characterized in that described λ satisfies λ ≠ 0.
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| CNB011319046A CN1171473C (en) | 2001-10-12 | 2001-10-12 | Optimized selection method for distributing intermediate frequency point of frequency |
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| CNB011319046A CN1171473C (en) | 2001-10-12 | 2001-10-12 | Optimized selection method for distributing intermediate frequency point of frequency |
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| WO2007082440A1 (en) * | 2006-01-16 | 2007-07-26 | Huawei Technologies Co., Ltd. | A method and system for base station automatic selecting and assigning resource |
| CN101198142B (en) * | 2006-12-06 | 2010-06-09 | 中兴通讯股份有限公司 | Load equalization method among frequency points of N frequency point cell |
| CN101141777B (en) * | 2007-06-26 | 2010-09-08 | 中兴通讯股份有限公司 | Automatic adjacent section planning method |
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| WO2011127789A1 (en) * | 2010-04-13 | 2011-10-20 | 中兴通讯股份有限公司 | Method and apparatus for neighbor cell optimization in wireless communication network |
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- 2001-10-12 CN CNB011319046A patent/CN1171473C/en not_active Expired - Lifetime
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| WO2007082440A1 (en) * | 2006-01-16 | 2007-07-26 | Huawei Technologies Co., Ltd. | A method and system for base station automatic selecting and assigning resource |
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| CN101198142B (en) * | 2006-12-06 | 2010-06-09 | 中兴通讯股份有限公司 | Load equalization method among frequency points of N frequency point cell |
| CN101141777B (en) * | 2007-06-26 | 2010-09-08 | 中兴通讯股份有限公司 | Automatic adjacent section planning method |
| CN101217740B (en) * | 2008-01-11 | 2010-11-24 | 展讯通信（上海）有限公司 | A physical layer BA table method for dual-card mobile terminals |
| CN101815300B (en) * | 2009-02-24 | 2012-09-05 | 大唐移动通信设备有限公司 | Cell frequency assignment method and device in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system |
| CN101711033B (en) * | 2009-12-17 | 2012-10-31 | 北京交通大学 | Dynamic channel allocating method applicable for perceiving radio network and system thereof |
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| CN101932105A (en) * | 2010-07-16 | 2010-12-29 | 苏州恩巨网络有限公司 | Frequency assigning method used for wireless digital television |
| CN102324944A (en) * | 2011-06-15 | 2012-01-18 | 大唐移动通信设备有限公司 | A kind of antenna calibration method and device |
| CN102324944B (en) * | 2011-06-15 | 2014-06-04 | 大唐移动通信设备有限公司 | Antenna calibration method and device |
| CN102883329A (en) * | 2011-07-15 | 2013-01-16 | 中国移动通信集团广东有限公司 | Distribution method and device for cell frequency points |
| CN103813347A (en) * | 2014-02-28 | 2014-05-21 | 电信科学技术研究院 | Base station frequency resource allocation method and network device |
| CN103813347B (en) * | 2014-02-28 | 2018-01-26 | 电信科学技术研究院 | A kind of base station frequency resource allocation method and the network equipment |
| US9992784B2 (en) | 2014-02-28 | 2018-06-05 | China Academy Of Telecommunications Technology | Base station frequency resource allocation method and network device |
| WO2016058448A1 (en) * | 2014-10-13 | 2016-04-21 | 中兴通讯股份有限公司 | Frequency band allocation method and device |
| WO2016134541A1 (en) * | 2015-02-28 | 2016-09-01 | 华为技术有限公司 | Frequency point configuration method in a microwave network, control device and system |
| CN107113624A (en) * | 2015-02-28 | 2017-08-29 | 华为技术有限公司 | A kind of method, control device and the system of the configuration of Microwave Net intermediate-frequeney point |
| CN107113624B (en) * | 2015-02-28 | 2020-03-31 | 华为技术有限公司 | Method, control equipment and system for configuring frequency points in microwave network |
| US10952213B2 (en) | 2015-02-28 | 2021-03-16 | Huawei Technologies Co., Ltd. | Frequency allocation method, control device, and system in microwave network |
| CN107548068A (en) * | 2016-06-29 | 2018-01-05 | 中国电信股份有限公司 | Realize the method and system of radio carrier frequency resource pool distribution |
| CN107548068B (en) * | 2016-06-29 | 2020-04-03 | 中国电信股份有限公司 | Method and system for realizing wireless carrier frequency resource pool allocation |
| CN108769994A (en) * | 2018-06-28 | 2018-11-06 | 深圳前海中电慧安科技有限公司 | Frequency point determines method and device |
| CN108769994B (en) * | 2018-06-28 | 2022-10-11 | 深圳前海中电慧安科技有限公司 | Frequency point determination method and device |
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