CN102083075B - Frequency planning and scrambling code planning method and device based on adjacent zone priority level - Google Patents
Frequency planning and scrambling code planning method and device based on adjacent zone priority level Download PDFInfo
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Abstract
The embodiment of the invention discloses a TD (time division) frequency planning and scrambling code planning method based on an adjacent zone priority level, comprising: an adjacent cell priority level is generated through a zone adjacent factor, a zone factor and a zone direction factor based on the base station zone attribute according to the system technical scheme; and a TD main carrier frequency is distributed according to the generated adjacent zone priority level to ensure the minimality of the frequency interferences among zones; and then, a system assigns base scrambling code blocks and scrambling codes according to the adjacent zone priority level and the frequency so as to ensure the average minimization of the mutual interference of the frequency scrambling code among zones. According to the embodiment of the invention, the calculation method of the adjacent zone priority level is more reasonable, and the setting and switching process of the adjacent zone relationship is more reasonable. Furthermore, co-frequency encounter phenomena among the adjacent zones are avoided by adopting the scheme, so that the mutual correlation of the scrambling codes among the adjacent zones is minimal, and the maximal frequency resource and scrambling code resource utilization and the minimum frequency and scrambling code interferences among zones are ensured. And the network performance indexes such as call completing rate are improved, and the client perception quality is greatly improved.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of frequency planning and scrambling planning method and equipment based on priority of adjacent domain.
Background technology
In mobile cellular network, the community that generally may switch is set to adjacent area, and travelling carriage (for example, the mobile terminals such as mobile phone) needs to keep the signal level of adjacent area to measure, to switch timely when needed.Wherein, common cellular network type comprises: GSM (Global System forMobile Communications, global system for mobile communications) network, CDMA (Code DivisionMultiple Access, code division multiple access) network, 3G (3rd-generation, 3G (Third Generation) Moblie technology) network, FDMA (Frequency Division Multiple Access, frequency division multiple access access) network, TDMA (Time Division Multiple Access, time division multiple access access) network etc.
In prior art, determine that the method for adjacent area comprises:
(1) qualitative description method
The community of direct neighbor on geographical position is classified as to Neighboring Cell List; By not exclusively adjacent on geographical position, but distance is more close, and relative community, antenna direction Yu Zhe community is classified as Neighboring Cell List.Wherein, adjacent area generally all requires adjacent area each other, and when A community is using B community as self adjacent area, B community also needs the adjacent area using A community as self.
Concrete, for the base station in dense urban and urban district, due to the distance between base station closer (0.5～1.5 kilometer), adjacent area should be done more; And for the base station of suburbs and suburbs and counties under the jurisdiction of a large city, although the spacing between base station is very large, also need using community adjacent on position as adjacent area, thereby guarantee to switch timely, avoid call drop.
(2) the quantitative calculating of single factors
Distance according between adjacent cell Yu Zhe community, sorts, and distance is nearer, and priority is higher.
Pilot signal strength according to receiving adjacent cell, sorts, and signal strength signal intensity is stronger, and priority is higher.
After priority is determined, can determine adjacent area according to definite priority.And if it is preferential to choose pilot signal strength, with pilot signal strength, to pay the utmost attention on the basis of factor, chosen distance compare little community is adjacent area; If selected distance is preferential, take distance as paying the utmost attention on the basis of factor, selecting pilot signal strength compare Qiang community is adjacent area.
In addition, the threshold value of pilot signal strength can also be set, using adjacent area coverage strength higher than the region of this pilot signal strength threshold value the overlapping region as Zhe community, this adjacent area, adjacent cell is classified as to Neighboring Cell List.
After adjacent area has been determined, also need TD frequency to plan:
Along with TD-SCDMA (Time Division-Synchronous Code Division MultipleAccess, the code division multiple access that time-division is synchronous) application popularization, for the resource of frequency range, be merely able to use the B resource of frequency range of 15M early stage, and the later stage is progressively brought into use the A resource of frequency range and the C resource of frequency range.According to the requirement of TD-SCDMA network technology, in the existing process that TD frequency is planned, in the situation that systematically considering indoor and outdoor phase mutual interference, need to adopt the thought of indoor and outdoor one coordinated planning, to reduce influencing each other of disturbing between indoor and outdoor as far as possible.
Concrete, in the process that TD frequency is planned, need to adopt the reserved principle of guard band, this principle comprises: the microcellulor that (1) is indoor and outdoor macrocellular adopt inter-frequency networking mode, and reserved frequency protection interval between two-tier network; (2) adopt the B frequency range of 15M to cover configuration mode, main carrier frequency is used " N frequency " technology of B frequency range; A frequency range is shared mode as capacity, and the configuration of auxiliary frequency is according to the demand increase and decrease of traffic carrying capacity.
Further, 9 frequencies of B frequency range are divided into two parts, first three frequency is as indoor main carrier frequency, then six frequencies are as outdoor main carrier frequency, and adopt respectively " N frequency " technology, principle according to neighbor cell " main carrier frequency alien frequencies, assistant carrier frequency can be frequently same " is carried out networking, then considers take that three carrier frequency (5MHz) carry out networking as minimum frequency unit.
A kind of N frequency point networking schematic diagram as shown in Figure 1, in Fig. 1, for adopting three carrier frequency (F1, F2, F3) to carry out the mode of frequency planning according to mentioned above principle.Wherein, black matrix partly represents main carrier frequency, and the main carrier frequency of the main carrier frequency of community and its immediate first lap adjacent cell is all alien frequencies.
In addition, after adjacent area has been determined, also need TD scrambler to plan:
In existing TD scrambling code planning technology, conventional scrambling code planning algorithm comprises: conventional scrambling code planning algorithm, bunch multiplexing algorithm, alternative algorithm and degree of disturbance bounding algorithm etc.
(1) for conventional scrambling code planning algorithm, algorithm is fairly simple, and the planning order of community is first direct allocation of downlink pilot code, then according to downlink frequency pilot code, determines scrambler group, last further definite scrambler.Wherein, the allocation flow of downlink frequency pilot code is specially: choose Target cell, in 32 available downlink frequency pilot code, choose adjacent cell and do not use downlink frequency pilot code, and this downlink frequency pilot code is distributed to Target cell, then according to corresponding 4 scramblers of downlink frequency pilot code, choose arbitrarily one and distribute to community.
(2) for a bunch multiplexing algorithm, be by user, to be selected the number of multiplexing code character, and in order to guarantee enough multiplex distances, can at least select 21 code characters as a multiplexing cluster, also can choose 30 code characters as a multiplexing cluster.Wherein, the code character that this bunch of multiplexing algorithm requires to pick out some from 32 code characters is carried out multiplexing, and selecting according to being divided into two kinds of this code character, is respectively: take scrambler correlation as distributing according to the good scrambler of screenability with multiplexing; Take composite code correlation as distributing according to the good scrambler of screenability with multiplexing.
(3) for alternative algorithm, consider that the coincidence probability of compound key produces the possibility of disturbing, scrambler has been assigned in different base scrambler groups.Wherein, base scrambler group is the set that can produce the scrambler composition of same compound code, when SF=16, has 12 base scrambler groups, when SF=8, has 7 base scrambler groups.
(4) for degree of disturbance bounding algorithm, first defined the concept of " degree of disturbance ", this degree of disturbance is a cross correlation value calculating, this degree of disturbance can reflect the correlation between the compound key that different scrambling codes group generates.Wherein, 32 scrambler groups degree of disturbance between any two can be by calculating, and because degree of disturbance calculates based on composite code correlation, so this degree of disturbance and system interference have direct relation.Can find out, this degree of disturbance bounding algorithm is usingd degree of disturbance as constraints, and the code character degree of disturbance summation using between system between all neighbor cells is minimum as the final condition of convergence.
In sum, in the main carrier frequency of TD-SCDMA (being TD frequency planning) and scrambling code planning process, need to consider the multiplexing community of frequency and scrambler, and the quality that multiplexing community is selected (being the quality that priority of adjacent domain is set), to directly have influence on the quality of TD-SCDMA frequency and scrambler distribution, and the size of neighboring interval interference.
In realizing process of the present invention, inventor finds at least to exist in prior art following problem:
(1), when adopting qualitative description method to determine adjacent area, only take the distribution that next-door neighbour's first lap adjacent area is alien frequencies, and when the adjacent area of first lap is many, cannot screen adjacent area; And when the adjacent area of first lap is fewer, cannot reasonably supplement the second circle adjacent area; Thereby the same frequency air exercise that causes neighboring interval, the phenomenon that co-channel interference is serious.
(2) when the priority of adjacent domain that adopts neighboring interval distance-taxis is determined method, cannot or carry on the back the situation of beating and distinguish antenna in cell air exercise, thereby cause dividing timing at TD main carrier frequency and scrambler, the selection of multiplexing community exists irrationality, and increased the strong jamming of neighboring interval.
(3) when the priority of adjacent domain that adopts the sequence of district pilots signal strength signal intensity is determined method, there is the problem that emulation is inaccurate, test bothers, and owing to existing building to stop and apart from Hen Jin community, causing avoiding the abnormal adjacent area because more district brings; In existing network, need Dui Yuequ community to be optimized, avoid the covering of Yue Qu community, thereby cause the frequent change of peripheral cell frequency and scrambler.
(4) subjective factor too much (for example, the setting of adjacent area reason, adjacent area importance, pilot frequency intensity threshold value, the judgement coverage etc. altogether that depends on pilot frequency intensity threshold value), and account form is complicated, and practicality is low.
(5) while adopting the quantitative calculating of single parameter, cannot take into account multiple situation, and in actual applications, adjacent section planning unreasonable, need to drop into a large amount of energy, and constantly be optimized and adjust by testing; For TD-SCDMA network, greatly affected the planning quality of TD frequency and TD scrambler.
(6) conventional scrambling code planning algorithm has only been considered the basic constraints of scrambling code planning, does not have the disturbing factor of too much consideration compound key, and conventional scrambling code planning algorithm depends on the selection of adjacent area closely, and interference suppressioning effect is not good.
(7) a bunch multiplexing algorithm is similar to GSM frequency multiplexing method, and interference suppressioning effect depends on the selection of multiplexing code character, and in prior art, software can not realized.
(8) alternative algorithm can not adopt the step of first allocation of downlink pilot code, rear selection scrambler in code planning; Need to pay the utmost attention to the distribution of base scrambler group, then determine in order downlink frequency pilot code and scrambler, constraints is stricter, and algorithm is complicated.
(9) base degree of disturbance bounding algorithm, when carrying out systems organization, has taken into full account that composite code correlation changes and the disturbed condition that brings carrys out planning system scrambler with stricter condition, and the interference between code word while reducing identical networking; Constraints is stricter, and algorithm is complicated; And computing time is long, can have or not the situation of solution to occur.
Summary of the invention
The embodiment of the present invention provides a kind of frequency planning and scrambling planning method, system and equipment based on priority of adjacent domain, to obtain accurately priority of adjacent domain, and carries out frequency planning and scrambling code planning according to this priority of adjacent domain.
In order to achieve the above object, the embodiment of the present invention has proposed a kind of frequency planning and scrambling planning method based on priority of adjacent domain, comprises the following steps:
According to community, in abutting connection with the factor, community, apart from the factor and community direction factor, obtain priority of adjacent domain;
According to described priority of adjacent domain dividing frequency and/or scrambler, minimum to guarantee the frequency of minizone and/or the interference of scrambler.
Frequency planning based on priority of adjacent domain and a scrambling code planning equipment, comprising:
Acquisition module, for obtaining priority of adjacent domain in abutting connection with the factor, community apart from the factor and community direction factor according to community;
Distribution module, for priority of adjacent domain dividing frequency and/or the scrambler obtaining according to described acquisition module, minimum to guarantee the frequency of minizone and/or the interference of scrambler.
Compared with prior art, the present invention has the following advantages: priority of adjacent domain computational methods are more reasonable, compare utilize signal strength signal intensity or propagate simulation calculation simpler, adjacent area arrange and handoff procedure more reasonable.And avoided neighboring interval with the phenomenon of frequently fighting each other, and make neighboring interval scrambler cross correlation value minimum, guarantee that frequency resource and scrambler resource utilization maximize, frequency, the scrambling interference of minizone minimize.Improve the network performance indexes such as call completing rate, promoted client perception quality.
Accompanying drawing explanation
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, to the accompanying drawing of required use in the present invention or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only accompanying drawings more of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is N frequency point networking schematic diagram in prior art;
Fig. 2 is a kind of frequency planning and scrambling planning method flow chart based on priority of adjacent domain that the embodiment of the present invention proposes;
Fig. 3 is the frequency planning based on priority of adjacent domain and the scrambling planning method flow chart proposing under a kind of concrete application scenarios of the embodiment of the present invention;
Fig. 4 calculates the method flow diagram of priority of adjacent domain in the embodiment of the present invention;
Fig. 5 is Thiessen polygon schematic diagram in the embodiment of the present invention;
Fig. 6 is Delaunay triangulation network schematic diagram in the embodiment of the present invention;
Fig. 7 is the schematic diagram of base station coverage area in the embodiment of the present invention;
Fig. 8 is the schematic diagram of overlay area, embodiment of the present invention small area;
Fig. 9 is embodiment of the present invention small area syntople schematic diagram;
Figure 10 is that embodiment of the present invention small area covering radius and station spacing are related to schematic diagram;
Figure 11 is forward in the embodiment of the present invention, cell relations schematic diagram dorsad;
Figure 12 and 13 is forward and community direction deviation angle schematic diagram dorsad in the embodiment of the present invention;
Figure 14 is priority of adjacent domain product process figure in the embodiment of the present invention;
Figure 15 is embodiment of the present invention medium frequency allocation flow figure;
Figure 16 is scrambler allocation flow figure in the embodiment of the present invention;
Figure 17 is a kind of frequency planning based on priority of adjacent domain of proposing of the embodiment of the present invention and the structure chart of scrambling code planning equipment.
Embodiment
In the embodiment of the present invention, provide a kind of method of quantitatively determining priority of adjacent domain, realized rational priority of adjacent domain sequence, improved the accuracy of adjacent section planning in wireless cellular network.Then, according to the sequence of priority of adjacent domain, select rational main carrier reusable community, automatic distribution T D-SCDMA main carrier frequency (being TD-SCDMA main carrier frequency), in frequency resource, maximize on application foundation and guaranteed that main carrier frequency minimizes with the impact between multiplexing community frequently, minizone average interference minimizes.Again, according to priority of adjacent domain and community main carrier frequency distribution condition, the scrambler that carries out TD-SCDMA network distributes, minimum to guarantee the interference of neighboring interval.
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described, obviously, described is only the present invention's part, rather than whole.Based on the present invention, those of ordinary skills, not making the every other invention obtaining under creative work prerequisite, belong to the scope of protection of the invention.
A kind of frequency planning and scrambling planning method based on priority of adjacent domain that the embodiment of the present invention proposes, as shown in Figure 2, comprises the following steps:
Obtaining described community comprises in abutting connection with the factor: according to Thiessen polygon, determine base station coverage area; According to the deflection of each community, and utilize community direction line center line between any two, described base station coverage area is divided into cell coverage area; Using described cell coverage area as spatial object, according to space querying, obtain community syntople, and calculate described community in abutting connection with the factor according to described community syntople.
Obtaining described community comprises apart from the factor: obtain cell attribute, and determine radius of society scope R according to described cell attribute; Wherein, cell attribute is a kind of, different radius of society scope corresponding to cell attribute in dense city, general city, suburb, rural area four generic attributes; According to the maximum station spacing Dmax of described radius of society range computation; Under clover pattern, described maximum station spacing Dmax is 1.5*max (R), and under Hexagon mode, described maximum station spacing Dmax is 1.732*max (R); Obtain the distance d between Serving cell and adjacent cell, and judge describedly apart from d, whether be less than adjacent area computer capacity L; Wherein, between described adjacent area computer capacity L and described maximum station spacing Dmax, there is corresponding relation; When described while being less than described adjacent area computer capacity L apart from d, according to described apart from d and described maximum station spacing Dmax calculation plot apart from the factor; Wherein, described community is d/Dmax apart from the factor.
Obtaining described community direction factor comprises: calculation services community direction line, and the angle theta 1 between Serving cell and adjacent cell line; And calculate adjacent cell direction line, and the angle theta 2 between described Serving cell and adjacent cell line; According to the deflection of Serving cell and adjacent cell, judge that described adjacent cell and described Serving cell are for community or incorgruous community in the same way; When described adjacent cell and described Serving cell are incorgruous community, according to the position relationship of described Serving cell and described adjacent cell, adjust described angle theta 2; When described adjacent cell and described Serving cell are incorgruous community, the angle theta 2 according to described angle theta 1 and after adjusting is calculated described community direction departure degree β; Wherein, described community direction factor β/360=(angle theta 2 after angle theta 1+ adjusts)/360; When described adjacent cell and described Serving cell are during for community in the same way, according to described angle theta 1 and described angle theta 2, calculate described community direction departure degree β; Wherein, described community direction factor β/360=(angle theta 1+ angle theta 2)/360.
In the embodiment of the present invention, according to community, in abutting connection with the factor, community, apart from the factor and community direction factor, obtain priority of adjacent domain and comprise: according to formula Adj=d/Dmax*a1+ β/360*a2+JJ*a3, obtain described priority of adjacent domain; Wherein, described a1, a2, a3 represent weight coefficient; Described d/Dmax is that described community is apart from the factor; Described β/360 are described community direction factor; Described JJ is that described community is in abutting connection with the factor; Described Adj is described priority of adjacent domain coefficient.
According to described priority of adjacent domain dividing frequency, comprise: according to described priority of adjacent domain distribution T D-SCDMA main carrier frequency; And/or, and according to described main carrier frequency distribution T D-SCDMA assistant carrier frequency and HSDPA assistant carrier frequency.
Further, according to described priority of adjacent domain distribution T D-SCDMA main carrier frequency, comprise: according to priority of adjacent domain order from high to low, select adjacent area, and make adjacent area as much as possible avoid using identical TD-SCDMA main carrier frequency; And/or, indoor and outdoors is adopted to inter-frequency networking, described main carrier frequency is separated, and increase the multiplexing coefficient of outdoor frequency; And/or, R4 frequency is distributed in to frequency range two, and HSDPA frequency is distributed in the middle of described frequency range.
In the embodiment of the present invention, according to described priority of adjacent domain, distribute scrambler to comprise: according to described priority of adjacent domain distribution T D-SCDMA base scrambler group; And according to the frequency, described base scrambler group and the described priority of adjacent domain order distribution T D-SCDMA scrambler that distribute.
Further, according to described priority of adjacent domain distribution T D-SCDMA base scrambler group, comprise: according to priority of adjacent domain selective sequential adjacent area from high to low, and make adjacent area as much as possible avoid using identical base scrambler group and use identical downlink synchronous sequence; And/or, according to priority of adjacent domain selective sequential adjacent area from high to low, and make adjacent area as much as possible avoid the base scrambler group that cross correlation is strong.
According to the frequency, described base scrambler group and the described priority of adjacent domain order distribution T D-SCDMA scrambler that distribute, comprise: according to priority of adjacent domain selective sequential adjacent area from high to low, make adjacent area as much as possible avoid the scrambler pair of the compound key conflict that the broadcast channel of main carrier is identical, and avoid the scrambler pair that compound key that main carrier is identical with the auxiliary carrier wave in high priority adjacent area conflicts; And/or, the scrambler in each base scrambler group of uniform distribution, and guarantee that each scrambler has default multiplex distance.
As shown in Figure 3, for in the embodiment of the present invention in conjunction with a kind of concrete application scenarios, the detailed description that frequency planning based on priority of adjacent domain and scrambling planning method are carried out, under this application scene, frequency planning that should be based on priority of adjacent domain and scrambling planning method are for existing TD-SCDMA network.
Concrete, the above-mentioned frequency planning based on priority of adjacent domain and scrambling planning method comprise the following steps:
Step 301, calculates priority of adjacent domain.
Concrete, can in abutting connection with the factor, community, apart from the factor and community direction factor, compute weighted to community, and obtain the priority of each adjacent cell.Wherein, numerical priority value is less, and priority of adjacent domain is higher.
It should be noted that, in embodiments of the present invention, based on influencing each other between cellular cell, overlapping relevant with distance, community radiation direction and the cell coverage area of minizone, by the influence degree between three's (be community in abutting connection with the factor, community apart from the factor and community direction factor), be weighted, can obtain the priority of adjacent cell, and the priority of using this adjacent cell determines rational adjacent area, then utilize priority of adjacent domain to carry out the distribution of TD-SCDMA frequency and scrambler.
As shown in Figure 4, in embodiments of the present invention, the process of this calculating priority of adjacent domain comprises the following steps:
Concrete, conventionally using community on geographical position the community of direct neighbor as adjacent area candidate cell, if while finding out the community of direct neighbor on geographical position, must first find out the overlay area of community, and in the embodiment of the present invention, will adopt Thiessen polygon to determine the overlay area of community.
This Thiessen polygon is a kind of method that rainfall according to the weather station of discrete distribution calculates average rainfall, be about to all adjacent weather stations and be linked to be triangle, and make the perpendicular bisector on these each limits of triangle, each weather station some perpendicular bisectors around just surround a polygon.Rainfall intensity by a unique weather station with comprising in this polygon represents the rainfall intensity in this polygonal region, and claims that this polygon is Thiessen polygon.
As shown in Figure 5, the polygon that wherein dotted line forms is exactly Thiessen polygon.Wherein, each summit of Thiessen polygon is each leg-of-mutton circumscribed circle center of circle, and Thiessen polygon is schemed also referred to as Voronoi, or dirichlet figure.
Concrete, the characteristic of this Thiessen polygon comprises:
A) in each Thiessen polygon, only contain a discrete points data;
B) point in Thiessen polygon arrives the nearest of corresponding discrete point;
C) point being positioned on Thiessen polygon limit is equal to the distance of the discrete point on its both sides.
It should be noted that Thiessen polygon can be for operations such as qualitative analysis, statistical analysis, contiguous analyses.For example, the character in Thiessen polygon region can be described by the character of discrete point; Can calculate by the data of discrete point the data in Thiessen polygon region; Judge when a discrete point is adjacent with other which discrete point, also can directly draw according to Thiessen polygon, and if Thiessen polygon be n limit shape, adjacent with n discrete point; When a certain data point falls into some Thiessen polygon, this data point is the most contiguous with corresponding discrete point, does not need to calculate distance.
According to Thiessen polygon, determining the overlay area of community, and according to the overlay area calculation plot of community in abutting connection with because of in subprocess, comprising:
(1) determine base station coverage area.
The latitude and longitude of base station information providing according to electronic chart etc., by a discrete point on the corresponding electronic chart in the geographical position at each place, base station, and forms the triangulation network by discrete point, and wherein, this triangulation network is called the Delaunay triangulation network.The structure of this Delaunay triangulation network, also referred to as the structure of TIN, builds the triangulation network, a kind of Delaunay triangulation network as shown in Figure 6 by discrete data point.
In this Delaunay triangulation network, need to determine which three data point forms a triangle, also referred to as automatically connecting the triangulation network; For the discrete point of the n in plane, corresponding plane coordinates is (xi, yi), i=1, and 2 ..., n, by 3 wherein close best triangles of formation, thereby makes each discrete point become vertex of a triangle.
Concrete, the result that automatically connects the triangulation network is the label on all leg-of-mutton three summits, for example, and (1,2,8), (2,8,3), (3,8,7) ... etc.; And in order to obtain best triangle, when the structure Delaunay triangulation network, need to make as much as possible leg-of-mutton three interior angles all become acute angle, and meet the criterion that Delaunay triangle produces, wherein, this criterion that meets the generation of Delaunay triangle is specially:
A) in the leg-of-mutton circumscribed circle of any one Delaunay, can not comprise any other discrete point.
B) adjacent two Delaunay triangles form convex quadrangle, and after the diagonal of exchange convex quadrangle, the reckling of six interior angles no longer increases; Wherein, this character is minimum angle maximal criterion.
In summary it can be seen, according to Thiessen polygon principle, the adjacent triangle of each base station discrete point, and connect these adjacent leg-of-mutton circumscribed circle centers of circle, obtain Thiessen polygon.For the Thiessen polygon at triangulation network edge, can make perpendicular bisector and mapborder and intersect, and form Thiessen polygon together with mapborder, the region that the region that Thiessen polygon surrounds covers for the interior discrete point of Thiessen polygon base station.
The schematic diagram of a kind of base station coverage area as shown in Figure 7, wherein, discrete point A, B, C, D, E ... represent base station A, B, C, D, E ..., and the overlay area of base station A, B, C, D is Thiessen polygon.
(2) determine cell coverage area.
According to the deflection of each base station cell (obtaining in the cell information that can input), and utilize community direction line center line between any two from step 501, base station range is divided into cell coverage area.
The schematic diagram of a kind of cell coverage area as shown in Figure 8, the overlay area of base station A is divided into HeA3 community, ,A2 community, A1 community, B overlay area, base station is divided into HeB3 community, ,B2 community, B1 community, C overlay area, base station is divided into HeC3 community, ,C2 community, C1 community, D overlay area, base station is divided into HeD3 community, ,D2 community, D1 community, by that analogy.
(3) according to the overlay area calculation plot of community in abutting connection with the factor.
For the computational process in this step is more clearly described, the following concept of paper:
(1) space querying.This space querying is by the spatial relation between geometric object, to build a kind of inquiry mode of filter condition, with respect to the inquiry mode based on attribute being built by attribute filter condition completely, based on spatial relation and inquiry mode that simultaneously can apply property filter condition, be called space querying, this space querying relates to three key elements, respectively: object search, searched figure layer and outcome record collection.
(2) geometric object.The geometric objects such as point, line, surface have clear and definite border rectangle, border, inside and outside; And the comparison of geometric object on spatial relation is exactly in fact the comparison to mutual border rectangle, border, inside and outside relation.
(3) for outdoor cell.The coverage rate of each base station cell is as an object.
(4) for indoor cell.Conventionally using the disc of building size as an object.
(5) community syntople.Utilize the principle of space querying, the community of search and Serving cell, base station direct neighbor, and the base station cell of these direct neighbors is called to community syntople.
In this step, according to the overlay area calculation plot of community, in abutting connection with the factor, be specially: using community coverage rate as spatial object, and according to space querying principle, obtain community syntople, and according to community syntople calculation plot in abutting connection with the factor.
A kind of community syntople schematic diagram as shown in Figure 9, when knowing the HeE3 community, ,E2 community, ,C3 community, ,B3 community, ,B1 community, ,A3 community, YouA2 community, community of YuA1 community direct neighbor, now, community that need to these adjacent cells is set to 0 in abutting connection with the factor; And remaining non-conterminous community is set to 1 in abutting connection with the factor.
Concrete, this calculation plot comprises apart from the process of the factor:
(1) all communities are divided into dense city, general city, suburb, rural area four generic attributes.
Because mobile communications network is very universal in various places, can count very easily cell attribute (can pass through to obtain in step 501), conventionally microzonation can be divided into dense city, general city, suburb, rural area four generic attributes.Certainly, in actual applications, can also need to this cell attribute be adjusted according to self.For example, microzonation is divided into dense city, general city, suburb three generic attributes, in the embodiment of the present invention, repeats no more.
Concrete, the radius of society of different attribute is different, and for example, the radius R of dense city can be 600 meters, and the radius R in general city can be 600～800 meters, and the radius R in suburb can be 800～1000 meters, the radius R in rural area can be 1000～1200 meters.Certainly, in practical application, this radius of society can also be adjusted according to actual needs.
(2) computer installation spacing, and according to the radius of society scope of zones of different attribute, calculate the maximum station spacing of zones of different attribute.
Generally, the station spacing of directional base station honeycomb and the relation of radius of society can be divided into clover and two kinds of patterns of hexagon, and a kind of coverage radius of cell and station spacing are as shown in figure 10 related to schematic diagram; In Figure 10, R is covering radius, and D is station spacing, in TD planning, if choose clover pattern, and D=1.5R, the maximum station spacing in minizone is Dmax=1.5*max (R).If choose Hexagon mode, D=1.732R, the maximum station spacing in minizone is Dmax=1.732*max (R).For example, under clover pattern, if drawn when area attribute is rural area, radius of society is 1000～1200 meters, now, D=1.5R, the maximum station spacing in minizone is Dmax=1.5*max (R)=1.5*1200 rice.
(3) distance between calculation services community and adjacent cell.For example, take and calculate distance d between A community and B community and describe as example.
A) concerning a certain community, adjacent area can be divided into positive area adjacent cell and region adjacent cell dorsad, and in the embodiment of the present invention, definition angle α scope Nei community, community main lobe center line (direction line) both sides is forward adjacent cell, otherwise other communities, region are adjacent cell dorsad.
A kind of forward as shown in figure 11, cell relations schematic diagram dorsad, for C3 community, the community in the region dorsad of D2He community, D1, community, ，Er community, the community D3Deng Junshi community C3 of the positive area of E1, community, B3, community, B2, community, B1, community, A3, community, A2, community, A1, community, community E3Deng Junshi community, E2, community C3.
B) α is more than or equal to the horizontal lobe width φ of antenna and is less than 90 °, and φ≤α < is 90 °, generally, and φ=65 °.
C) in order to reduce amount of calculation, the computer capacity of supposing adjacent area is L, and whether judging distance d is less than L, if apart from d within the scope of L, using respective cell as candidate adjacent, otherwise, be abandoned.Wherein, the distance that L is 2～3 times of Dmax is generally got in positive area, and the distance that L is 1～2 times of Dmax is got in region dorsad.
(4) calculation plot, apart from the factor, wherein, is d/Dmax apart from factor ，Ji community apart from the factor as community divided by maximum station spacing using minizone distance.Wherein, the distance factor with the different districts of standing is 0.
Concrete, the process of calculation plot direction factor comprises:
(1) angle theta 1 between calculation services community direction line and adjacent cell line, wherein, gets 1≤180 ° of θ; And if Serving cell is indoor cell, θ 1=0 °
，Yi C3 community is that example describes as Serving cell for convenience of description, community direction deviation angle schematic diagram as shown in Figures 12 and 13.Wherein, for C3 community, the value of θ 1 will, as adjacent cell, as can be seen from the figure, can be obtained easily in HeD3 community, ,D2 community, ,D1 community, ,A3 community, ,A2 community, ，A1 community.
For base station A (A1, A2, A3), θ 1 angle equals the angle that two community line CA turn to C3 community direction line counterclockwise; Concerning base station D (D1, D2, D3), θ 1 angle equals the angle that two community line CD turn to C3 community direction line clockwise.
(2) calculate the angle theta 2 of adjacent cell direction Xian Yuliang community line AC.Wherein, get 2≤180 ° of θ; And if adjacent cell is indoor cell, θ 2=0 °
Continue as shown in Figures 12 and 13, for base station A (A1, A2, A3), the θ 2 Wei Liang community AC lines of ,A3 community, ，A2 community turn to the angle of A community direction line clockwise; The θ 2 Wei Liang community AC lines of A1 community turn to the angle of A community direction line counterclockwise.For base station D (D1, D2, D3), the θ 2 Wei Liang community DC lines of D3, D2 community turn to the angle of D community direction line counterclockwise; The θ 2 Wei Liang community DC lines of D1 community turn to the angle of D community direction line clockwise.
(3) according to the deflection of Serving cell and adjacent cell, judge that this adjacent cell belongs to community or incorgruous community in the same way.
If Serving cell and adjacent cell main lobe radiation direction are distributed in the homonymy of two base station (community) lines and extended line, it is community in the same way; Otherwise, if Serving cell and adjacent cell main lobe radiation direction are distributed in the heteropleural of two base station (community) lines and extended line, be incorgruous community.
Base station C (C1, C2, C3) the C3 community that continuation be take in Figure 12 and 13 describes as example, if θ 1 angle is got angle by turning to counterclockwise, θ 2 is got angle by turning to clockwise, is community in the same way, for example, and the A2, A3 community in Figure 12 and 13; θ 2 is got angle by turning to counterclockwise, is incorgruous community, for example, and Figure 12 and 13 Zhong A1 communities.
Otherwise if θ 1 angle is got angle by turning to clockwise, θ 2 is got angle by turning to counterclockwise, be community in the same way, for example, the D3, D2 community in Figure 12 and 13; θ 2 is got angle by turning to clockwise, is incorgruous community, for example, and Figure 12 and 13 Zhong D1 communities.
(4) according in the same way with incorgruous community, θ 2 angles are made to relevant treatment.Be specially:
If adjacent cell and Serving cell are communities in the same way, θ 2 angles do not process; If adjacent cell and Serving cell are incorgruous community, need to be divided into three kinds of situations, and process accordingly respectively:
When θ 1≤φ, adjacent cell is in the positive area of Serving cell, θ 2=θ 2+ θ 1/ φ * θ 1; ，A1 community for example.
When θ 1 > φ and θ 2≤φ, Serving cell is in the positive area of adjacent cell, θ 2=θ 2+ θ 2/ φ * θ 2.
When θ 1 > φ and θ 2 > φ, i.e. Serving cell and adjacent cell region, θ 2=θ 2+ φ dorsad each other; ，D1 community for example.
It should be noted that, in the situation that having indoor cell, for above-mentioned process (3) and process (4), also need to calculate as follows.
If Serving cell is indoor cell, adjacent cell is ，Ze Serving cell, outdoor cell and adjacent cell is community in the same way; If Serving cell is outdoor cell, adjacent cell is indoor cell, θ 2=180 °.
If Serving cell is indoor cell, adjacent cell be also ，Ze Dang community, indoor cell in abutting connection with the factor=0 o'clock, θ 1+ θ2=0，Dang community is in abutting connection with the factor=1 o'clock, θ 1+ θ 2=360 °.
(5) calculation plot direction factor, wherein, the degree that community direction factor departs from Serving cell direction by adjacent cell direction is calculated, and can weigh this community direction departure degree with β=θ 1+ θ 2.Wherein, this θ 1 is drawn result in above-mentioned (1); And θ 2 by above-mentioned (4) the result that draws after processing.
Concrete, can using β divided by 360 result as community direction factor, with the angle of ，Yi Liangge community, the different districts direction line at station divided by 360 as direction factor.
Concrete, after having calculated apart from the factor and community direction factor in abutting connection with the factor, community when the community of Serving cell and adjacent cell, according to certain ratio, be weighted, can draw all priority of adjacent domain of relative each Serving cell.
Further, the coefficient of priority of adjacent domain is as shown in formula (1), and wherein, priority factor is less, and priority of adjacent domain is higher.
Priority of adjacent domain coefficient Adj=d/Dmax*a1+ β/360*a2+JJ*a3 formula (1)
In formula (1), a1, a2, a3 represent weight coefficient, in practical application, meet under the prerequisite of a1+a2+a3=1, a1, a2, a3 are suitably adjustable, and the scope of a1 is 0.4～0.5, the scope of a2 is 0.3～0.4, the scope of a3 is 0.2～0.25, for example, and a1=0.45, a2=0.3, a3=0.25.Certainly, according to the actual needs, the value of a1, a2, a3 can also be adjusted, and does not repeat them here.
In formula (1), d/Dmax be community apart from the factor, direction factor ，JJWei community, β /360Wei community is in abutting connection with the factor.
In the embodiment of the present invention, also need the priority factor Adj calculating according to order sequence from small to large, and leave in priority of adjacent domain table.Certainly, this sequence can also be adjusted according to actual needs, does not repeat them here.
Step 302, carries out frequency planning according to priority of adjacent domain to TD-SCDMA.Wherein, the available frequency band of TD-SCDMA has B frequency range 2010-2025MHz, totally 9 frequencies, A frequency range 1880-1900M, totally 12 frequencies.
Consider and can only use 9 frequencies of B frequency range early stage, and much terminal is only supported B frequency, so main carrier frequency can only be used B frequency, and assistant carrier frequency can be selected arbitrarily the frequency of A frequency range and the frequency of B frequency range.
In the embodiment of the present invention, agreement is to 9 of B frequency range frequencies, be designated as respectively FB1, FB2, FB3 ..., FB9; To 12 of A frequency range frequencies, be designated as respectively FA1, FA2, FA3 ..., FA11, FA12.
It should be noted that, according to priority of adjacent domain, TD-SCDMA is being carried out in the process of frequency planning, the overall principle of TD-SCDMA frequency planning is to guarantee that the interference of minizone frequency is minimum, according to priority of adjacent domain, guarantees that the interference of minizone frequency is minimum.
In this step, the process of TD-SCDMA being carried out to frequency planning according to priority of adjacent domain specifically comprises:
(1) planning of main carrier frequency; According to priority of adjacent domain, carry out the distribution of TD-SCDMA main carrier, guarantee, on the maximum basis utilizing of frequency resource, to guarantee the minimum interference with the multiplexing community of frequency.
Concrete, in order to reduce the interference between same adjacent frequency, need to adopt N frequency technology, guaranteeing can not be identical between main carrier frequency and assistant carrier frequency in each community, and the main carrier frequency between same base different districts can not be identical; In addition in order to reduce the multiplexing coefficient of main carrier frequency of the interference ，Wei community setting of common signal channel, be the bigger the better.
In order to realize the above-mentioned object of planning, the embodiment of the present invention has proposed a kind of allocative decision of carrying out main carrier frequency according to priority of adjacent domain, further comprises:
A) the multiplexing of main carrier frequency is distributed in the alap adjacent area of priority of adjacent domain, makes the co-channel interference impact of neighboring interval minimum.
B) indoor and outdoor adopts inter-frequency networking mode, makes main carrier frequency separately, and increases as far as possible the multiplexing coefficient of outdoor frequency, for example, FB1～FB3 is indoor frequency, when FB4～FB9 is outdoor frequency, can be set to 6 by the multiplexing coefficient of outdoor main carrier frequency, the multiplexing coefficient of indoor main carrier frequency is set to 3.
C) R4 frequency is distributed in two of frequency range, and HSDPA frequency is distributed in the centre of frequency range.For example, FB1, FB7, FB8, FB9 are R4 frequency, and FB3, FB4, FB5, FB6 are HSDPA frequency, and FB2 is motor-driven, can be configured to as required R4 frequency or HSDPA frequency.
It should be noted that, due to the mode of HSDPA employing with R4 network hybrid networking, HSDPA business can be monopolized time slot or carrier wave, in order to take, does not affect R4 business as criterion, need to adjust the shared frequency of HSDPA business and the shared frequency of R4 business according to customer volume.By R4 frequency being distributed in to two of frequency range, HSDPA frequency is distributed in to the centre of frequency range, can guarantee that HSDPA business does not impact R4 business.
(2) planning of assistant carrier frequency and HSDPA carrier frequency, carries out the distribution of the auxiliary carrier wave of TD-SCDMA and HSDPA carrier wave according to priority of adjacent domain, minimum to guarantee the planning minizone frequency interferences of assistant carrier frequency and HSDPA carrier frequency.
When carrying out auxiliary allocation of carriers, assistant carrier frequency A frequency range and B frequency range are optional, A frequency range and B frequency range are separately planned, and according to networking requirement, A frequency range frequency and B frequency range frequency are combined; Further comprise:
A) assistant carrier frequency (R4 carrier wave and/or HSDPA carrier wave) can adopt identical frequency process, and in order further to improve carrier-quality, should guarantee that frequency reuse is as far as possible large in the situation that allowing.
B) consider when HSDPA carrier wave and R4 carrier wave share same frequency, can produce very large interference to R4 carrier wave, therefore, can not occur that HSDPA carrier wave and R4 carrier wave share the situation of same frequency; Be that the carrier wave that R4 is used can not be done the carrier wave that HSDPA is used.
C) consider the PHS frequency range 1900～1920M of Personal Handyphone System, because performance of filter is bad by the clutter interference causing, need to select the first six frequency FA1, FA2 ..., FA6 is outdoor frequency, rear six frequency FA7, FA8 ..., FA12 is indoor frequency.Certainly, in practical application, also the centre frequencies such as FA5, FA6, FA7, FA8 can be adjusted to outdoor frequency and use from indoor as required, or be adjusted to indoor frequency and use from outdoor.
(3) the A frequency range of outdoor base station and the frequency planning of B frequency range.
Minimum in order to guarantee the interference of minizone frequency, can draw outdoor base station TD-SCDMA frequency assignment chart, the outdoor frequency planning of a kind of AB frequency range (being frequency assignment chart) as shown in table 1, by using this frequency assignment chart, can be conducive to the realization of frequency planning software, also be conducive to the dilatation of later stage community contained fan.
In table 1, according to horizontal packet configuration, to community, according to longitudinal grouping, determine main carrier and auxiliary carrier wave, V1 does main carrier all the time, and V2 fixedly does auxiliary carrier wave 1, and normal font is partly R4 carrier wave, and black bolded section is outdoor HSDPA carrier wave.
Table 1
Wherein, it in table 1, is full configuration situation, black bolded section is HSDPA frequency, according to the configurable number of community contained fan configurable number and A frequency range contained fan, the configurable number of HSDPA contained fan, respectively from B frequently and A frequently the row of correspondence, and obtain successively from left to right the row of corresponding R4 frequency number and the row of HSDPA frequency number.
(4) frequency planning of indoor base station A frequency range and B frequency range.
Consider that indoor distributed system generally all done to isolate by building, therefore, only need to be with 3 main carrier frequencies, same, main carrier frequency also needs according to priority of adjacent domain on the maximum basis of using of frequency resource, from high to low as much as possible avoid with frequency multiplexing.And similar for the distribution of assistant carrier frequency and the allocative decision of outdoor base station, do not repeat them here.
The indoor frequency planning of a kind of AB frequency range as shown in table 2, wherein, the rule that indoor base station TD frequency is distributed, according to horizontal packet configuration, to community, according to longitudinal grouping, determine main carrier and auxiliary carrier wave, V1 does main carrier all the time, V2 fixedly does auxiliary carrier wave 1, normal font is partly R4 carrier wave, and black bolded section is indoor HSDPA carrier wave, and black italicized item is motor-driven; When HSDPA and R4 carrier wave are greater than 9, corresponding auxiliary carrier wave can be selected in V4～V6, and indoor and outdoor HSDPA carrier wave exists with frequently.
Table 2
Wherein, in table 2, be full configuration situation, black bolded section is HSDPA frequency, FB2 (black italicized item) is motor-driven, both can be used as R4 frequency, also can be used as HSDPA frequency; According to community contained fan configurable number and A frequency range contained fan configurable number, HSDPA contained fan configurable number, respectively from B frequently and A frequently the row of correspondence, and obtains the row of corresponding R4 frequency number and the row of HSDPA frequency number from left to right.
Step 303, carries out scrambling code planning according to priority of adjacent domain to TD-SCDMA.
Because the spread spectrum that TD-SCDMA system is used is smaller, the code resource of TD-SCDMA system has the advantages that quantity is few, chip is short, scrambler length short (only having 16bit), and because the correlation of intersymbol is bad, the compound key that Liang Ge is used community may have stronger correlation, thereby causes the stronger mutual interference in minizone.And in order to solve the strongly disturbing problem in minizone, reduce the interference of minizone, and in the embodiment of the present invention, need, according to priority of adjacent domain, TD-SCDMA is carried out to scrambling code planning, specifically comprise the following steps:
(1) according to priority of adjacent domain, carry out the distribution of TD-SCDMA base scrambler group, to guarantee that the impact of disturbing block multiplexing community with base is minimum on the maximum basis utilizing of base scrambler group resource.This process further comprises:
A) meet adjacent area as much as possible (priority from high to low) and avoid using identical base scrambler group and use identical downlink synchronous sequence, avoid other scrambler on the row and column at base scrambler group place; The signal situation of scrambler group cross correlation value table as shown in table 3:
Table 3:
B) meet adjacent area as much as possible (priority from high to low) and avoid the base scrambler group that cross correlation is strong, especially avoid the compound code character that co-frequency cell cross correlation is strong.Base scrambler group cross correlation value table as shown in table 4, wherein, the base scrambler group of black bolded section is the compound code character that cross correlation is strong, need to avoid.
Table 4:
Can find out, when the value of maximum cross correlation is close to 1 time, illustrate that the cross correlation between adjacent area is more intense, need to avoid the base scrambler group that cross correlation is strong.In table 4, take and 0.875 represent cross correlation as threshold value.For example, when maximum cross-correlation value is greater than 0.875, illustrate that cross correlation is more intense.
(2) according to the frequency of distributing, base scrambler group and priority of adjacent domain order, distribute scrambler, meet adjacent area as much as possible (priority from high to low) and avoid scrambling conflict, and scrambler resource utilization maximizes.This process further comprises:
A) meet avoid main carrier in adjacent area as much as possible (priority from high to low) broadcast channel (for example, PCCPCH) scrambler pair of identical compound key conflict, and avoid the scrambler pair of the main carrier compound key identical with the auxiliary carrier wave in high priority adjacent area conflict, the scrambler of a kind of PCCPCH conflict as shown in table 5 is to list.
Table 5:
B) code in each base scrambler group is wanted uniform distribution, and guarantees that each yard has certain multiplex distance, or the scrambler being assigned with in certain distance can not be re-used.
C), during physical planning, also need to consider to start to plan from the community of City Regions.
Wherein, in the method that the embodiment of the present invention provides, each step can also be adjusted according to the actual needs.
For basis clearly illustrates and below in conjunction with the priority of adjacent domain product process figure shown in Figure 14, the process of this calculating priority of adjacent domain is further detailed the technical scheme providing in the embodiment of the present invention.
Step 1416, according to the coefficient Adj=d/Dmax*a1+ β/360*a2+JJ*a3 of priority of adjacent domain, calculates priority of adjacent domain.
Wherein, in the method that the embodiment of the present invention provides, each step can also be adjusted according to the actual needs.
Below in conjunction with the frequency allocation flow figure shown in Figure 15, this frequency assignment procedure is further detailed.
Wherein, in the method that the embodiment of the present invention provides, each step can also be adjusted according to the actual needs.
Below in conjunction with the scrambler allocation flow figure shown in Figure 16, this scrambler assigning process is further detailed.
Wherein, in the method that the embodiment of the present invention provides, each step can also be adjusted according to the actual needs.
The method visible, the application of the invention embodiment provides, has the following advantages:
1) during the quantitative calculating of priority of adjacent domain, consider cell attribute, community covering adjacency, minizone distance factor and antenna in cell and affected D-factor etc., priority of adjacent domain computational methods are more reasonable, calculating signal strength signal intensity or propagation emulation are simpler, and adjacent area setting and handoff procedure are more reasonable.
2) avoided neighboring interval with the phenomenon of frequently fighting each other, made frequency resource on the basis of maximum utilization, the co-channel interference of same multiplexing minizone is frequently minimum.
3) meeting under the condition of the constraint of scrambler cross correlation and scrambling conflict constraint, base is disturbed the impact minimum of block multiplexing community, makes, with frequently maximizing with code interval community number, in scrambler resource maximum, to utilize on basis, and the strong jamming of neighboring interval is minimum.
4) frequency resource utilization maximizes, and scrambler resource utilization maximizes, and minimum interference, has improved the network performance indexes such as call completing rate, promotes client perception quality.
5) algorithm is simple, is conducive to the realization of TD-SCDMA frequency and scrambling code planning software, and the automatic dividing frequency of software and scrambler, avoid artificial mistake, greatly increases work efficiency.
6) the frequency scrambler quality of new construction is protected, and later stage dilatation, network optimization adjustment reasonability and promptness are protected.
A kind of frequency planning and scrambling code planning equipment based on priority of adjacent domain that the embodiment of the present invention also proposes, as shown in figure 17, comprising:
Acquisition module 171, for obtaining priority of adjacent domain in abutting connection with the factor, community apart from the factor and community direction factor according to community.
Described acquisition module 171 specifically for, according to formula Adj=d/Dmax*a1+ β/360*a2+JJ*a3, obtain described priority of adjacent domain coefficient;
Wherein, described a1, a2, a3 represent weight coefficient; Described d/Dmax is that described community is apart from the factor; Described β/360 are described community direction factor; Described JJ is that described community is in abutting connection with the factor; Described Adj is described priority of adjacent domain coefficient.
Described acquisition module 171 further comprises:
First obtains submodule 1711, for obtaining described community in abutting connection with the factor.
Described first obtain submodule 1711 specifically for, according to Thiessen polygon, determine base station coverage area; According to the deflection of each community, and utilize community direction line center line between any two, described base station coverage area is divided into cell coverage area; And using described cell coverage area as spatial object, according to space querying, obtain community syntople, and calculate described community in abutting connection with the factor according to described community syntople.
Second obtains submodule 1712, for obtaining described community apart from the factor.
Described second obtain submodule 1712 specifically for, obtain cell attribute, and determine radius of society scope R according to described cell attribute; Wherein, cell attribute is a kind of, different radius of society scope corresponding to cell attribute in dense city, general city, suburb, rural area four generic attributes;
According to the maximum station spacing Dmax of described radius of society range computation; Under clover pattern, described maximum station spacing Dmax is 1.5*max (R), and under Hexagon mode, described maximum station spacing Dmax is 1.732*max (R);
Obtain the distance d between Serving cell and adjacent cell, and judge describedly apart from d, whether be less than adjacent area computer capacity L; Wherein, between described adjacent area computer capacity L and described maximum station spacing Dmax, there is corresponding relation;
When described while being less than described adjacent area computer capacity L apart from d, according to described apart from d and described maximum station spacing Dmax calculation plot apart from the factor; Wherein, described community is d/Dmax apart from the factor.
The 3rd obtains submodule 1713, for obtaining described community direction factor.
The described the 3rd obtain submodule 1713 specifically for, calculation services community direction line, and the angle theta 1 between Serving cell and adjacent cell line; And calculate adjacent cell direction line, and the angle theta 2 between described Serving cell and adjacent cell line;
According to the deflection of Serving cell and adjacent cell, judge that described adjacent cell and described Serving cell are for community or incorgruous community in the same way;
When described adjacent cell and described Serving cell are incorgruous community, according to the position relationship of described Serving cell and described adjacent cell, adjust described angle theta 2;
When described adjacent cell and described Serving cell are incorgruous community, the angle theta 2 according to described angle theta 1 and after adjusting is calculated described community direction departure degree β; Wherein, described community direction factor β/360=(angle theta 2 after angle theta 1+ adjusts)/360;
When described adjacent cell and described Serving cell are during for community in the same way, according to described angle theta 1 and described angle theta 2, calculate described community direction departure degree β; Wherein, described community direction factor β/360=(angle theta 1+ angle theta 2)/360.
Distribution module 172, for priority of adjacent domain dividing frequency and/or the scrambler obtaining according to described acquisition module 171, minimum to guarantee the frequency of minizone and/or the interference of scrambler.
Described distribution module 172 further comprises:
The first distribution sub module 1721, for according to described priority of adjacent domain dividing frequency.
Described the first distribution sub module 1721 specifically for, according to described priority of adjacent domain distribution T D-SCDMA main carrier frequency; And according to described main carrier frequency distribution T D-SCDMA assistant carrier frequency and HSDPA assistant carrier frequency.
Described the first distribution sub module 1721 also for, according to order from high to low of priority of adjacent domain, select adjacent area, and make adjacent area as much as possible avoid using identical TD-SCDMA main carrier frequency; And/or, indoor and outdoors is adopted to inter-frequency networking, described main carrier frequency is separated, and increase the multiplexing coefficient of outdoor frequency; And/or, R4 frequency is distributed in to frequency range two, and HSDPA frequency is distributed in the middle of described frequency range.
The second distribution sub module 1722, for distributing scrambler according to described priority of adjacent domain.
Described the second distribution sub module 1722 specifically for, according to described priority of adjacent domain distribution T D-SCDMA base scrambler group; And according to the frequency, described base scrambler group and the described priority of adjacent domain order distribution T D-SCDMA scrambler that distribute.
Described the second distribution sub module 1722 also for, according to priority of adjacent domain selective sequential adjacent area from high to low, and make adjacent area as much as possible avoid using identical base scrambler group and use identical downlink synchronous sequence; And/or, according to priority of adjacent domain selective sequential adjacent area from high to low, and make adjacent area as much as possible avoid the base scrambler group that cross correlation is strong.
Described the second distribution sub module 1722 also for, according to priority of adjacent domain selective sequential adjacent area from high to low, make adjacent area as much as possible avoid the scrambler pair of the compound key conflict that the broadcast channel of main carrier is identical, and avoid the scrambler pair that compound key that main carrier is identical with the auxiliary carrier wave in high priority adjacent area conflicts; And/or, the scrambler in each base scrambler group of uniform distribution, and guarantee that each scrambler has default multiplex distance.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separatedly dispose.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add necessary general hardware platform by software and realizes.Understanding based on such, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, or the network equipment etc.) carry out method of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
The invention described above sequence number, just to describing, does not represent the quality of embodiment.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (12)
1. the frequency planning based on priority of adjacent domain and a scrambling planning method, is characterized in that, comprises the following steps:
Obtain community in abutting connection with the factor, community apart from the factor and community direction factor;
According to community, in abutting connection with the factor, community, apart from the factor and community direction factor, obtain priority of adjacent domain;
According to described priority of adjacent domain dividing frequency and/or scrambler, minimum to guarantee the frequency of minizone and/or the interference of scrambler;
Wherein, obtaining described community comprises in abutting connection with the factor:
According to Thiessen polygon, determine base station coverage area;
According to the deflection of each community, and utilize community direction line center line between any two, described base station coverage area is divided into cell coverage area;
Using described cell coverage area as spatial object, according to space querying, obtain community syntople, and calculate described community in abutting connection with the factor according to described community syntople;
Obtaining described community comprises apart from the factor:
Obtain cell attribute, and determine radius of society scope R according to described cell attribute; Wherein, cell attribute is a kind of, different radius of society scope corresponding to cell attribute in dense city, general city, suburb, rural area four generic attributes;
According to the maximum station spacing Dmax of described radius of society range computation; Under clover pattern, described maximum station spacing Dmax is 1.5*max(R), under Hexagon mode, described maximum station spacing Dmax is 1.732*max(R);
Obtain the distance d between Serving cell and adjacent cell, and judge describedly apart from d, whether be less than adjacent area computer capacity L; Wherein, between described adjacent area computer capacity L and described maximum station spacing Dmax, there is corresponding relation;
When described while being less than described adjacent area computer capacity L apart from d, according to described apart from d and described maximum station spacing Dmax calculation plot apart from the factor; Wherein, described community is d/Dmax apart from the factor;
Obtaining described community direction factor comprises:
Calculation services community direction line, and the angle theta 1 between Serving cell and adjacent cell line; And calculate adjacent cell direction line, and the angle theta 2 between described Serving cell and adjacent cell line;
According to the deflection of Serving cell and adjacent cell, judge that described adjacent cell and described Serving cell are for community or incorgruous community in the same way;
When described adjacent cell and described Serving cell are incorgruous community, according to the position relationship of described Serving cell and described adjacent cell, adjust described angle theta 2;
When described adjacent cell and described Serving cell are incorgruous community, the angle theta 2 according to described angle theta 1 and after adjusting is calculated described community direction departure degree β; Wherein, the angle theta 2 after described community direction factor β/360=(angle theta 1+ adjustment)/360;
When described adjacent cell and described Serving cell are during for community in the same way, according to described angle theta 1 and described angle theta 2, calculate described community direction departure degree β; Wherein, described community direction factor β/360=(angle theta 1+ angle theta 2)/360.
2. the method for claim 1, is characterized in that, obtains priority of adjacent domain comprise according to community in abutting connection with the factor, community apart from the factor and community direction factor:
According to formula Adj=d/Dmax*a1+ β/360*a2+JJ*a3, obtain priority of adjacent domain coefficient;
Wherein, described a1, a2, a3 represent weight coefficient; Described d/Dmax is that described community is apart from the factor; Described β/360 are described community direction factor; Described JJ is that described community is in abutting connection with the factor; Described Adj is described priority of adjacent domain coefficient.
3. the method for claim 1, is characterized in that, according to described priority of adjacent domain dividing frequency, comprises:
According to described priority of adjacent domain distribution T D-SCDMA main carrier frequency; And according to described main carrier frequency distribution T D-SCDMA assistant carrier frequency and HSDPA assistant carrier frequency.
4. method as claimed in claim 3, is characterized in that, according to described priority of adjacent domain distribution T D-SCDMA main carrier frequency, comprises:
According to priority of adjacent domain order from high to low, select adjacent area, and make adjacent area as much as possible avoid using identical TD-SCDMA main carrier frequency; And/or,
Indoor and outdoors is adopted to inter-frequency networking, described main carrier frequency is separated, and increase the multiplexing coefficient of outdoor frequency; And/or,
R4 frequency is distributed in to frequency range two, and HSDPA frequency is distributed in the middle of described frequency range.
5. the method for claim 1, is characterized in that, according to described priority of adjacent domain, distributes scrambler to comprise:
According to described priority of adjacent domain distribution T D-SCDMA base scrambler group; And according to the frequency, described base scrambler group and the described priority of adjacent domain order distribution T D-SCDMA scrambler that distribute.
6. method as claimed in claim 5, is characterized in that, according to described priority of adjacent domain distribution T D-SCDMA base scrambler group, comprises:
According to priority of adjacent domain selective sequential adjacent area from high to low, and make adjacent area as much as possible avoid using identical base scrambler group and use identical downlink synchronous sequence; And/or,
According to priority of adjacent domain selective sequential adjacent area from high to low, and make adjacent area as much as possible avoid the base scrambler group that cross correlation is strong.
7. method as claimed in claim 5, is characterized in that, according to the frequency, described base scrambler group and the described priority of adjacent domain order distribution T D-SCDMA scrambler that distribute, comprises:
According to priority of adjacent domain selective sequential adjacent area from high to low, make adjacent area as much as possible avoid the scrambler pair of the compound key conflict that the broadcast channel of main carrier is identical, and avoid the scrambler pair that compound key that main carrier is identical with the auxiliary carrier wave in high priority adjacent area conflicts; And/or,
Scrambler in each base scrambler group of uniform distribution, and guarantee that each scrambler has default multiplex distance.
8. the frequency planning based on priority of adjacent domain and a scrambling code planning equipment, is characterized in that, comprising:
Acquisition module, for obtaining priority of adjacent domain in abutting connection with the factor, community apart from the factor and community direction factor according to community;
Distribution module, for priority of adjacent domain dividing frequency and/or the scrambler obtaining according to described acquisition module, minimum to guarantee the frequency of minizone and/or the interference of scrambler;
Wherein, described acquisition module comprises:
First obtains submodule, for determining base station coverage area according to Thiessen polygon; According to the deflection of each community, and utilize community direction line center line between any two, described base station coverage area is divided into cell coverage area; And using described cell coverage area as spatial object, according to space querying, obtain community syntople, and calculate described community in abutting connection with the factor according to described community syntople;
Second obtains submodule, for obtaining cell attribute, and determines radius of society scope R according to described cell attribute; Wherein, cell attribute is a kind of, different radius of society scope corresponding to cell attribute in dense city, general city, suburb, rural area four generic attributes; According to the maximum station spacing Dmax of described radius of society range computation; Under clover pattern, described maximum station spacing Dmax is 1.5*max(R), under Hexagon mode, described maximum station spacing Dmax is 1.732*max(R); Obtain the distance d between Serving cell and adjacent cell, and judge describedly apart from d, whether be less than adjacent area computer capacity L; Wherein, between described adjacent area computer capacity L and described maximum station spacing Dmax, there is corresponding relation; When described while being less than described adjacent area computer capacity L apart from d, according to described apart from d and described maximum station spacing Dmax calculation plot apart from the factor; Wherein, described community is d/Dmax apart from the factor;
The 3rd obtains submodule, for calculation services community direction line, and the angle theta 1 between Serving cell and adjacent cell line; And calculate adjacent cell direction line, and the angle theta 2 between described Serving cell and adjacent cell line; According to the deflection of Serving cell and adjacent cell, judge that described adjacent cell and described Serving cell are for community or incorgruous community in the same way; When described adjacent cell and described Serving cell are incorgruous community, according to the position relationship of described Serving cell and described adjacent cell, adjust described angle theta 2; When described adjacent cell and described Serving cell are incorgruous community, the angle theta 2 according to described angle theta 1 and after adjusting is calculated described community direction factor β; Wherein, described community direction factor β=(angle theta 2 after angle theta 1+ adjusts)/360; When described adjacent cell and described Serving cell are during for community in the same way, according to described angle theta 1 and described angle theta 2, calculate direction factor β/360, described community; Wherein, described community direction factor β/360=(angle theta 1+ angle theta 2)/360.
9. equipment as claimed in claim 8, is characterized in that,
Described acquisition module specifically for, according to formula Adj=d/Dmax*a1+ β/360*a2+JJ*a3, obtain described priority of adjacent domain coefficient;
Wherein, described a1, a2, a3 represent weight coefficient; Described d/Dmax is that described community is apart from the factor; Described β/360 are described community direction factor; Described JJ is that described community is in abutting connection with the factor; Described Adj is described priority of adjacent domain coefficient.
10. equipment as claimed in claim 8, is characterized in that, described distribution module comprises:
The first distribution sub module, for according to described priority of adjacent domain dividing frequency;
The second distribution sub module, for distributing scrambler according to described priority of adjacent domain.
11. equipment as claimed in claim 10, is characterized in that,
Described the first distribution sub module specifically for, according to described priority of adjacent domain distribution T D-SCDMA main carrier frequency; And according to described main carrier distribution T D-SCDMA assistant carrier frequency and HSDPA assistant carrier frequency;
Described the second distribution sub module specifically for, according to described priority of adjacent domain distribution T D-SCDMA base scrambler group; And according to the frequency, described base scrambler group and the described priority of adjacent domain order distribution T D-SCDMA scrambler that distribute.
12. equipment as claimed in claim 11, is characterized in that,
Described the first distribution sub module also for, according to order from high to low of priority of adjacent domain, select adjacent area, and make adjacent area as much as possible avoid using identical TD-SCDMA main carrier frequency; And/or, indoor and outdoors is adopted to inter-frequency networking, described main carrier frequency is separated, and increase the multiplexing coefficient of outdoor frequency; And/or, R4 frequency is distributed in to frequency range two, and HSDPA frequency is distributed in the middle of described frequency range;
Described the second distribution sub module also for, according to priority of adjacent domain selective sequential adjacent area from high to low, and make adjacent area as much as possible avoid using identical base scrambler group and use identical downlink synchronous sequence; And/or, according to priority of adjacent domain selective sequential adjacent area from high to low, and make adjacent area as much as possible avoid the base scrambler group that cross correlation is strong;
According to priority of adjacent domain selective sequential adjacent area from high to low, make adjacent area as much as possible avoid the scrambler pair of the compound key conflict that the broadcast channel of main carrier is identical, and avoid the scrambler pair that compound key that main carrier is identical with the auxiliary carrier wave in high priority adjacent area conflicts; And/or, the scrambler in each base scrambler group of uniform distribution, and guarantee that each scrambler has default multiplex distance.
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