CN104780548A - Method and device for automatically judging use of double electrically-controlled antennas - Google Patents
Method and device for automatically judging use of double electrically-controlled antennas Download PDFInfo
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Abstract
The invention relates to a method and device for automatically judging the use of double electrically-controlled antennas. The method comprises the following steps: performing coverage simulation on the coverage areas of a main cell to be judged and an adjacent cell of the main cell to generate a coverage grid map of the coverage areas; performing coverage difference modeling on the main cell according to the coverage grid map, and calculating a comprehensive overlapping coverage difference coefficient; and determining the use of the double electrically-controlled antennas of the main cell by using the comprehensive overlapping coverage different coefficient.
Description
Technical Field
The invention relates to an antenna management technology in the field of mobile communication, in particular to a method and a device for automatically judging the use of a dual-tone antenna.
Background
Time division long term evolution (TD-LTE) technology is a transition between the third generation (3G) and the fourth generation (4G), is considered as a 4G predecessor in the industry, and is currently the global standard for 3.9G. As a must-go route to 4G, TD-LTE technology and networks are increasingly being approved by international telecommunication vendors and operators.
From the perspective of saving the investment of operators and facilitating the network operation, the TD-LTE and time division synchronous code division multiple access (TD-SCDMA) need to adopt a networking mode of co-station deployment, sharing antenna feeder resources and sharing antenna feeder cells. At present, in the TD-LTE network planning stage, the determination of which cells use the dual-electric tuning antenna is carried out according to manual experience.
In the prior art, whether a TD-SCDMA and TD-LTE common antenna sector adopts a dual-tone antenna is judged according to artificial experience by combining wireless environment, frequency band difference and technical characteristics, so that the judgment is difficult to be accurate, and the following defects exist:
firstly, the construction cost of the TD-LTE network is increased, and the resources are wasted. Because the cell needing to use the dual-electric tuning antenna cannot be accurately positioned, unnecessary use conditions of the dual-electric tuning antenna may occur.
Second, the initial performance of the TD-LTE network is affected. Some cells needing to use the dual-modulation antenna are not used, and the situation that TD-LTE and TD-SCDMA coverage are difficult to coordinate occurs, so that the network performance is influenced.
Thirdly, whether the common antenna sector uses the dual-modulation antenna is judged through manual experience, so that the efficiency is low, and the popularization and the use are not facilitated.
Disclosure of Invention
In view of this, embodiments of the present invention are intended to provide a method and an apparatus for automatically determining the use of dual-tone antennas, which can automatically determine the use of dual-tone antennas in cells of different systems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides a method for automatically judging the use of a dual-tone antenna, which comprises the following steps: coverage simulation is carried out on coverage areas of a main cell to be judged and a cell adjacent to the main cell, and a coverage grid graph of the coverage area is generated; performing coverage difference modeling on the main cell according to the coverage grid graph, and calculating a comprehensive overlapping coverage difference coefficient; and determining the use of the dual-modulation antenna of the main cell by utilizing the comprehensive overlapping coverage difference coefficient.
In the above solution, before performing coverage simulation on the coverage areas of the main cell to be determined and the neighboring cells of the main cell, the method further includes: geographic rasterization is carried out on the coverage area, and an antenna model is obtained; the antenna models are two different antenna models of two frequency bands of TD-SCDMA and TD-LTE supported by the double-modulation antenna; correspondingly, the dual-electric tuning antenna simultaneously supports two systems of TD-SCDMA and TD-LTE.
In the above scheme, the performing coverage simulation on the coverage areas of the main cell to be determined and the neighboring cells of the main cell includes: and performing rasterization coverage simulation on the TD-SCDMA system and the TD-LTE system of the coverage area respectively according to a propagation model, an antenna model, engineering parameters and a geographical rasterization result, and calculating a received signal code power (PCCPCH RSCP) value of a main common control channel in a grid of the TD-SCDMA system and a PCCPCH RSCP value in the grid of the TD-LTE system by taking base stations of a main cell and an adjacent cell as central points respectively.
In the foregoing solution, the performing coverage difference modeling on the primary cell according to the coverage grid map, and calculating a comprehensive overlapping coverage difference coefficient includes: constructing a three-dimensional Voronoi diagram of the main cell and the adjacent cell; determining the adjacent cell of the main cell and the corresponding influence weight according to the three-dimensional Voronoi diagram; and calculating the comprehensive overlapping coverage difference coefficient of the main cell.
In the above scheme, the stereoscopic Voronoi diagram for constructing the main cell and the neighboring cell is: and constructing a three-dimensional Voronoi diagram of the main cell and the adjacent cell by utilizing correction factors generated by the antenna downward inclination angle, the antenna hanging height of the main cell and the antenna downward inclination angle and the antenna hanging height of the adjacent cell.
In the foregoing solution, the calculating the comprehensive overlapping coverage difference coefficient includes: respectively calculating the overlapping coverage of the TD-SCDMA system and the overlapping coverage of the TD-LTE system according to the grid field intensity and the influence weight of each adjacent cell and the main cell; and acquiring a comprehensive overlapping coverage difference coefficient by using the overlapping coverage of the TD-SCDMA and the overlapping coverage of the TD-LTE.
In the foregoing solution, the determining, by using the comprehensive overlapping coverage difference coefficient, the usage of the dual-modulation antenna in the primary cell is: when the double-electric tuning antenna does not exist in the adjacent cell and the comprehensive overlapping coverage coefficient of the main cell is determined to be higher than a preset threshold value, the double-electric tuning antenna is used; and when the adjacent cell has the double-electric tuning antenna or the comprehensive overlapping coverage coefficient of the main cell is lower than or equal to a preset threshold value, the double-electric tuning antenna is not used.
The embodiment of the invention also provides a judgment device for the use of the double-modulation antenna, which comprises: the device comprises a coverage simulation unit, a coverage difference modeling unit and a judgment unit; the coverage simulation unit is configured to perform coverage simulation on coverage areas of a main cell to be determined and a cell adjacent to the main cell, and generate a coverage grid map of the coverage area; the coverage difference modeling unit is used for performing coverage difference modeling on the main cell according to the coverage grid graph and calculating a comprehensive overlapping coverage difference coefficient; and the judging unit is used for determining the use of the dual-modulation antenna of the main cell by utilizing the comprehensive overlapping coverage difference coefficient.
In the above scheme, the apparatus further comprises: the system comprises a geographical rasterization unit and an antenna model library unit; the geographic rasterizing unit is used for performing geographic rasterizing on the coverage area; the antenna model library unit is used for storing antenna model data information; the antenna models are two different antenna models of two frequency bands of TD-SCDMA and TD-LTE supported by the double-modulation antenna; correspondingly, the dual-electric tuning antenna simultaneously supports two systems of TD-SCDMA and TD-LTE.
In the foregoing solution, the coverage simulation unit is specifically configured to: and performing rasterization coverage simulation on the TD-SCDMA system and the TD-LTE system of the coverage area respectively according to a propagation model, an antenna model, engineering parameters and a geographical rasterization result, and calculating PCCPCH RSCP values in a grid of the TD-SCDMA system and PCCPCH RSCP values in the grid of the TD-LTE system by taking base stations of a main cell and an adjacent cell as central points respectively.
In the foregoing solution, the coverage difference modeling unit is specifically configured to: constructing a three-dimensional Voronoi diagram of the main cell and the adjacent cell; determining the adjacent cell of the main cell and the corresponding influence weight according to the three-dimensional Voronoi diagram; and calculating the comprehensive overlapping coverage difference coefficient of the main cell.
In the foregoing solution, the decision unit is specifically configured to: when the double-electric tuning antenna does not exist in the adjacent cell and the comprehensive overlapping coverage coefficient of the main cell is determined to be higher than a preset threshold value, the double-electric tuning antenna is used; and when the adjacent cell has the double-electric tuning antenna or the comprehensive overlapping coverage coefficient of the main cell is lower than or equal to a preset threshold value, the double-electric tuning antenna is not used.
In the method and the device for automatically judging the use of the dual-electric-modulation antenna, provided by the embodiment of the invention, in a network planning stage, a system carries out coverage simulation on a coverage area, constructs a differential coverage model based on differential coverage to calculate a comprehensive overlapping coverage differential coefficient, and determines the use of the dual-electric-modulation antenna through the comprehensive overlapping coverage differential coefficient, so that the quick, effective and automatic judgment on whether the dual-electric-modulation antenna is used in a cell of a different system can be realized, the construction cost of a network is reduced, and the network performance after the TD-LTE network is deployed is ensured; in addition, the embodiment of the invention is simple and convenient to realize and easy to popularize.
Drawings
Fig. 1 is a schematic flow chart illustrating an automatic determination method for dual-tone antenna usage according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an implementation flow of performing coverage difference modeling on a primary cell according to a coverage grid map and calculating a comprehensive overlapping coverage difference coefficient according to an embodiment of the present invention;
FIG. 3A is a schematic diagram of a conventional method for constructing a Voronoi diagram;
FIG. 3B is a schematic diagram of a method for constructing a three-dimensional Voronoi diagram according to the present invention;
fig. 4 is a schematic diagram of an implementation flow of automatically determining the use of dual-modulation antennas in a main cell by using a comprehensive overlapping coverage difference coefficient according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a structure of an automatic decision device for implementing the use of a dual-electrical tilt antenna according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a structure of an automatic determination device for use in a dual-tunable antenna according to another embodiment of the present invention.
Detailed Description
In the embodiment of the invention, coverage simulation is carried out on the coverage areas of a main cell to be judged and the adjacent cells of the main cell to generate a coverage grid graph of the coverage areas; performing coverage difference modeling on the main cell according to the coverage grid graph, and calculating a comprehensive overlapping coverage difference coefficient; and determining the use of the dual-modulation antenna of the main cell by utilizing the comprehensive overlapping coverage difference coefficient.
Here, the coverage simulation is: the received signal code power (PCCPCHRSCP) values of the primary common control channel in different communication system grids for the coverage areas of the primary cell to be decided and its neighbors are calculated.
The determination is carried out according to whether the adjacent cell of the main cell to be judged has a double-modulation antenna or not and whether the comprehensive overlapping coverage coefficient of the main cell is higher than a preset threshold or not.
The concept of the adjacent cell is different from that of the adjacent cell, and the adjacent cell is an adjacent cell when the coverage area of the main cell is not determined before the stereo Voronoi diagram is constructed; and the adjacent cell is the adjacent cell after the coverage range of the main cell is determined based on the construction of the stereo Voronoi diagram.
The invention is further described in detail below with reference to the drawings and the specific embodiments.
As shown in fig. 1, the method for automatically determining the use of a dual-tone antenna according to an embodiment of the present invention includes the following steps:
step 101: coverage simulation is carried out on coverage areas of a main cell to be judged and a cell adjacent to the main cell, and a coverage grid graph of the coverage area is generated;
illustratively, before step 101, the embodiment of the present invention may further include: geographic rasterization is carried out on the coverage area, and an antenna model is obtained;
specifically, geographic rasterization is carried out on coverage areas of a main cell to be judged and adjacent cells thereof, and antenna model data information is obtained; the main cell to be judged is a co-antenna inter-system cell simultaneously covered by a TD-SCDMA system and a TD-LTE system; the antenna model is two different antenna models of two frequency bands of TD-SCDMA and TD-LTE supported by the double-modulation antenna; correspondingly, the dual-modulation antenna simultaneously supports two systems of TD-SCDMA and TD-LTE.
The antenna model data information includes information such as main lobe width and gain in different directions.
For a community of a co-antenna different system simultaneously supporting two systems of TD-SCDMA and TD-LTE, the antenna adopted by the community is an antenna simultaneously supporting two systems of TD-SCDMA and TD-LTE, and correspondingly, two different antenna models are provided corresponding to two frequency bands of TD-SCDMA and TD-LTE, namely, two different gains are provided in each direction for the different frequency bands.
Here, the geographic rasterization of the coverage area may be performed with an accuracy of 5 meters by 5 meters, that is: and dividing the area covered by the main cell to be judged and the adjacent cells into grids of 5 meters by 5 meters.
Generally, for cells of different systems covering a TD-SCDM system and a TD-LTE system simultaneously, a networking mode of co-station deployment, sharing of antenna feeder resources and co-antenna feeder cells can be adopted for covering a wireless network, frequency bands of the TD-SCDMA and the TD-LTE networks are both located in a 2GHz frequency band, and the frequency band difference is small, such as the frequency band difference is less than 100 MHz; however, the same set of antenna parameters, such as: azimuth, mechanical downtilt, electronic downtilt, main lobe width, etc., it is difficult to simultaneously meet the coverage requirements of these two systems.
However, for the dual-modulation antenna, the same antenna can be provided with two different electronic downtilts, and the two different electronic downtilts are respectively arranged for the TD-SCDMA system and the TD-LTE system, for example, the electronic downtilt of the TD-SCDMA system is 5 degrees, and the electronic downtilt of the TD-LTE system is 3 degrees, so as to ensure the simultaneous coverage of the two networks, and can simultaneously meet the coverage field intensity and quality requirements of the two systems.
Geographic rasterization is carried out on coverage areas of a main cell to be judged and a cell adjacent to the main cell, rasterization coverage simulation is carried out on a TD-SCDMA system and a TD-LTE system of the coverage areas of the main cell to be judged and the cell adjacent to the main cell respectively according to a propagation model, an antenna model, engineering parameters and a geographic rasterization result, PCCPCH RSCP received by each grid from a base station is calculated by taking the base station of the main cell and the cell adjacent to the main cell as a central point, and therefore a coverage grid map of the coverage areas of the main cell and the cell adjacent to the main cell is generated; the engineering parameters comprise information parameters including partial antenna parameters, such as longitude and latitude, azimuth angle, mechanical downward inclination angle, electronic downward inclination angle and the like of a cell.
Here, the coverage simulation specifically calculates PCCPCH RSCP values of a coverage area in the TD-SCDMA system grid and PCCPCH RSCP values in the TD-LTE system grid.
Taking macro cellular COST231-Hata propagation model as an example, how to calculate the TD-LTE system and PCCPCH RSCP values of the TD-LTE system in the grid are respectively explained. Wherein the PCCPCHRSCP value is the PCCPCH RSCP value at the center point of the grid as the PCCPCH RSCP value of the grid.
Specifically, the calculation process of the PCCPCH RSCP value in each grid of the TD-LTE system includes:
step a: calculating the basic transmission loss L of the COST231-Hata propagation model in the urban areab；
Lb=46.3+33.9log(f)-13.82log(Hb)-α(Hm)+[44.9-6.55log(Hb)]log(d)+Cm
Wherein L isbThe unit dB is the electric wave propagation loss of the quasi-smooth terrain in the urban area; f is the working frequency in MHz; hbIs the effective height of the base station antenna, unit m; hmIs the effective height of the mobile station antenna, unit m; d is the distance between the mobile station (the center point of the grid) and the base station, and the unit is km; alpha (H)m) Is a mobile station antenna height factor; cmFor correction factor, C under quasi-smooth terrain in urban areamIs 0.
Wherein the current grid is determined by the distance d between the mobile station (the center point of the grid) and the base station.
Step b: l according to step abCalculating PCCPCH RSCP value of grid with distance d from base station;
RS RSRP(n)＝PRS_cell(m)＋Gainantenna（m）-Lb
wherein, PRS_cell(m)Is the transmitting signal power of TD-LTE system cell (Lm);
RS RSRP(n)the RS signal intensity of a TD-LTE system cell (Lm) received by the sweep frequency test point n;
Gainantenna(m)the antenna gain at the connection between the center point of the grid and the cell (Lm); the antenna types including azimuth angle, electronic downward inclination angle, mechanical downward inclination angle, test terminal, transmitting antenna and the like need to be considered during calculation;
Lbis the radio propagation loss of the signal from the grid center point n and to the cell (lm) of transmission.
Here, the calculated RS RSRP(n)I.e. the PCCPCH RSCP value in the grid for the TD-LTE system.
The calculation of PCCPCH RSCP values in each grid for TD-SCDMA system is the same as the calculation of PCCPCH RSCP values in each grid for TD-LTE system, and is not repeated here.
Step 102: performing coverage difference modeling on the main cell according to the coverage grid graph, and calculating a comprehensive overlapping coverage difference coefficient;
fig. 2 is a schematic flow chart of an implementation process of a method for performing coverage difference modeling on a primary cell according to a coverage grid map and calculating a comprehensive overlapping coverage difference coefficient according to an embodiment of the present invention, that is, a specific implementation flow chart of step 102 in fig. 1 according to an embodiment of the present invention, as shown in fig. 2, the method includes the following steps:
step 102 a: constructing a three-dimensional Voronoi diagram of the main cell and the adjacent cell;
in the embodiment of the invention, correction factors generated by the downward inclination angle of an antenna of a main cell to be judged, the upward inclination angle of an antenna of an adjacent cell of the main cell and the upward inclination angle of the antenna of the adjacent cell are utilized to construct a three-dimensional Voronoi diagram of the main cell and the adjacent cell. In the process of constructing the Voronoi diagram, the downward inclination angle and the hanging height of the antenna of the main cell and the adjacent cell are introduced, so that the coverage overlapping condition of the main cell and the adjacent cell can be accurately reflected.
Step 102 b: determining the adjacent cells of the main cell and the influence weights corresponding to the adjacent cells according to the three-dimensional Voronoi diagram;
specifically, the neighboring cells of the main cell are determined according to the stereo Voronoi diagrams of the main cell and the neighboring cells constructed in step 102a, and the ratio of the total length of the line segment corresponding to each neighboring cell enclosing the coverage area of the main cell to the total length of all the line segments is used as the influence weight of the corresponding neighboring cell on the main cell.
Here, the neighbor cell means: constructing an adjacent cell when the coverage area of a main cell is not determined before a three-dimensional Voronoi diagram is constructed; and the adjacent area means: the neighbouring cells behind the coverage of the primary cell are determined based on constructing a stereo Voronoi diagram.
Step 102 c: calculating a comprehensive overlapping coverage difference coefficient of the main cell;
specifically, the overlapping coverage of the TD-SCDMA system and the overlapping coverage of the TD-LTE system are respectively calculated according to the grid field intensity and the influence weight of each adjacent cell and the main cell; and calculating the comprehensive overlapping coverage difference coefficient of the main cell according to the overlapping coverage of the TD-SCDMA system and the overlapping coverage of the TD-LTE system.
Here, the process of calculating the overlapping coverage of the TD-SCDMA system in the primary cell includes:
when the absolute value of the grid field intensity of the adjacent cell-the absolute value of the grid field intensity of the main cell is more than or equal to 0dB, the TDS overlapping coverage of the adjacent cell and the main cell is as follows:
CSmain adjacentNumber of grids where neighbor cells appear in primary cell/number of covered grids of primary cell
When n adjacent cells exist in the main cell, the overlapping coverage of the main cell is the weighted sum of the overlapping coverage of the n adjacent cells; wherein, the weight of each neighboring cell is the influence weight of the neighboring cell on the main cell.
Overlapping coverage CSMaster and slave=K1*CSMain 1+K2*CSMain 2+…+Kn*CSMain n
Wherein CSMaster and slaveOverlapping coverage of TD-SCDMA as primary cell, KnFor the weight of the influence of the neighbor n on the primary cell, CSMain nIs the overlapping coverage of the neighboring cell n and the primary cell.
Due to the technical difference between TD-LTE and TD-SCDMA, the requirement for the threshold of the level difference between the neighboring cell and the main cell is different, and generally, the requirement is as follows:
the absolute value of the grid field intensity of the adjacent cell-the absolute value of the grid field intensity of the main cell is more than or equal to-6 dB
The calculation process of the overlapping coverage of the TD-LTE system of the main cell is the same as the calculation process of the overlapping coverage of the TD-SCDMA system of the main cell, and is not described herein again.
Then, obtaining a comprehensive overlapping coverage difference coefficient by using the overlapping coverage of the TD-SCDMA and the overlapping coverage of the TD-LTE; wherein the integrated overlap coverage difference coefficient CMaster and slaveThe calculation process of (2) is as follows:
Cmaster and slave=（CSMaster and slave-CLMaster and slave）/CSMaster and slave
Wherein CSMaster and slaveOverlap coverage, CL, for TD-SCDMAMaster and slaveIs the overlapping coverage of TD-LTE.
The following is a working process of the conventional method for constructing a Voronoi diagram shown in fig. 3A and the method for constructing a stereoscopic Voronoi diagram shown in fig. 3B according to the embodiment of the present invention, and further details of the specific implementation of step 102 are described by using a specific embodiment.
A conventional method for constructing a Voronoi diagram is shown in fig. 3A, where S1 is the position of a main cell, S2 and S3 are the positions of two other sectors at the same site of S1, F, E are the positions of two adjacent cells, respectively, and the coverage area of the main cell S1 is a polygon enclosed by line segments L1, L2, T1 and T2; wherein, L1 is an angular bisector of ≥ S1S2, L2 is an angular bisector of ≥ S1S3, T1 is a perpendicular bisector of S1F, T2 is a perpendicular bisector of S1E, O1 and O2 are perpendicular bisectors of T1 and S1F, and T2 and S1E, respectively.
In the embodiment of the invention, a three-dimensional Voronoi diagram of a main cell and an adjacent cell is constructed by using correction factors generated by the downward inclination angle of an antenna of the main cell, the downward inclination angle of an antenna hanging height and the downward inclination angle of the antenna of the adjacent cell and the antenna hanging height.
Wherein, the correction factor of the SO2 is: s1 antenna hanging high Cos (S1 declination angle)/(S1 antenna hanging high Cos (S1 declination angle) + E2 antenna hanging high Cos (E2 declination angle))
To obtain: distance of SO2 = SE S1 antenna suspension Cos (S1 downtilt angle)/(S1 antenna suspension Cos (S1 downtilt angle) + E2 antenna suspension Cos (E2 downtilt angle))
Similarly, EO2 distance = SE × E2 antenna suspension Cos (E2 downtilt)/(S1 antenna suspension Cos (S1 downtilt) + E2 antenna suspension Cos (E2 downtilt))
SO1 distance = SF S1 antenna suspension Cos (S1 downtilt)/(S1 antenna suspension Cos (S1 downtilt) + F2 antenna suspension Cos (F2 downtilt))
FO1 distance = SF F2 antenna suspension Cos (F2 downtilt)/(S1 antenna suspension Cos (S1 downtilt) + F2 antenna suspension Cos (F2 downtilt))
In the embodiment of the present invention, a method for constructing a stereoscopic Voronoi diagram by introducing correction factors generated by an antenna downtilt angle, an antenna suspension height of a main cell, an antenna downtilt angle and an antenna suspension height of an adjacent cell is shown in fig. 3B, and positions of diagonal bisectors T1 and T2 of an antenna suspension height and a downtilt angle of a cell S1 are corrected to deviate from center positions O1 and O2, so as to reflect the influence of the downtilt angle and the antenna suspension height on a coverage area.
According to the method of constructing a stereoscopic Voronoi diagram of the present invention shown in fig. 3B, determining the neighboring cell adjacent to the primary cell S1 includes: s3, E3, E2, F3, F2 and S2; and taking the ratio of the line segment corresponding to each adjacent cell enclosing the coverage range of the main cell to the total length of all the line segments as the influence weight of the adjacent cell on the main cell.
Specifically, the influence weights of the adjacent cells S3, E3, E2, F3, F2 and S2 are respectively:
KS1S3=SD/(SD+DG+CG+BC+SB)
KS1E3=DE/(SD+DG+CG+BC+SB)
KS1E2=CE/(SD+DG+CG+BC+SB)
KS1F3=AC/(SD+DG+CG+BC+SB)
KS1F2=AB/(SD+DG+CG+BC+SB)
KS1S2=SB/(SD+DG+CG+BC+SB)
wherein, KS1S3The influence weight of the neighboring cell S3 on the primary cell S1 is expressed in the same manner as the influence weights of other neighboring cells.
According to the conditions: the grid field intensity absolute value of the main cell S1-the grid field intensity absolute value of the adjacent cells is not less than 0dB, and the overlapping coverage of each adjacent cell is obtained as follows: CSS1S3、CSS1E3、CSS1E2、CSS1F3、CSS1S32And then:
CSS1=KS1S3*CSS1S3+KS1E3*CSS1E3+KS1E2*CSS1E2+KS1F3*CSS1F3+KS1S2*CSS1S32
according to the conditions: the absolute value of grid field intensity of the main cell S1-the absolute value of grid field intensity of the adjacent cells is more than or equal to-6 dB, and the overlapping coverage of each adjacent cell is obtained as follows: CLS1S3、CLS1E3、CLS1E2、CLS1F3、CLS1S32And then: CLS1=KS1E3*CLS1E3+KS1E2*CLS1E2+KS1F3*CLS1S1F3+KS1S2*CLS1S32
Integrated overlap coverage difference coefficient CS1Comprises the following steps:
CS1=（CSS1-CLS1）/CSS1
step 103: determining the use of the dual-modulation antenna of the main cell by utilizing the comprehensive overlapping coverage difference coefficient;
specifically, when a dual-electrical modulation antenna does not exist in a neighboring cell and the comprehensive overlapping coverage difference coefficient of the main cell is determined to be higher than a preset threshold value, the dual-electrical modulation antenna is determined to be used; and when the adjacent cell has the double-electric tuning antenna or the comprehensive overlapping coverage difference coefficient of the main cell is not greater than a preset threshold value, the double-electric tuning antenna is not used.
Referring to fig. 4, a processing procedure for automatically determining the use of dual-tone antennas in a primary cell by using a comprehensive overlapping coverage difference coefficient according to an embodiment of the present invention is shown below, and step 103 is further described in detail, where as shown in fig. 4, the automatic determination procedure includes the following steps:
step 103 a: receiving a comprehensive overlapping coverage difference coefficient;
specifically, the integrated overlapping coverage difference coefficient of the primary cell calculated in step 102 is received.
Step 103 b: judging whether a double-modulation antenna exists in the adjacent region according to the antenna type of the adjacent region;
specifically, whether a dual-modulation antenna exists is judged according to the name of the antenna in the adjacent area, and the antennas with different names represent antennas with different functions; if yes, entering step 103e, the main cell does not use the dual-electric tuning antenna, and ending the current processing flow; if not, step 103c is performed.
Steps 103c to 103 e: judging whether the stored comprehensive overlapping coverage difference coefficient of the main cell is larger than a preset threshold value, if so, entering a step 103d, and using a dual-electric tuning antenna in the main cell; if the comprehensive overlapping coverage difference coefficient of the primary cell is not greater than the preset threshold, step 103e is performed, and the primary cell does not use the dual-electrical tilt antenna, and the current processing flow is ended.
In the practical application process, the system for implementing the method can be a single system, and logic units for implementing different functions can also be added in the existing base station.
In order to implement the foregoing method, an embodiment of the present invention further provides a device for automatically determining whether a dual-tone antenna is used, and as shown in fig. 5, the device mainly includes: a coverage simulation unit 501, a coverage difference modeling unit 502 and a judgment unit 503; wherein,
a coverage simulation unit 501, configured to perform coverage simulation on a main cell to be determined and neighboring cells of the main cell, and generate a coverage grid map of the area;
a coverage difference modeling unit 502, configured to perform coverage difference modeling on the primary cell according to the coverage grid map generated by the coverage simulation unit 501, and calculate a comprehensive overlapping coverage difference coefficient;
a decision unit 503, configured to determine the usage of the dual-tone antenna in the main cell by using the comprehensive overlapping coverage difference coefficient calculated by the coverage difference modeling unit 502.
In practical applications, before the coverage simulation unit 501 performs the coverage simulation, the coverage area needs to be geographically rasterized, and an antenna model is needed in the process of the coverage simulation. Thus, as shown in fig. 6, the apparatus of an embodiment of the present invention may further include: a geographic rasterizing unit 504 and an antenna model library unit 505; wherein,
a geographic rasterizing unit 504 configured to perform geographic rasterization on a coverage area;
an antenna model library unit 505 for storing antenna model data information;
accordingly, before the coverage simulation process, the coverage simulation unit 501 obtains the antenna model from the antenna model library unit 505;
the antenna models are two different antenna models of two frequency bands of TD-SCDMA and TD-LTE supported by the double-modulation antenna; correspondingly, the dual-electric tuning antenna simultaneously supports two systems of TD-SCDMA and TD-LTE.
Specifically, the coverage simulation unit 501 performs rasterization coverage simulation on the TD-SCDMA system and the TD-LTE system of the coverage area respectively according to a propagation model, an antenna model, an engineering parameter, and a geographical rasterization result, and calculates PCCPCH RSCP values in a grid of the TD-SCDMA system and PCCPCH RSCP values in the grid of the TD-LTE system with base stations of a main cell and an adjacent cell as central points.
The coverage difference modeling unit 502 constructs a three-dimensional Voronoi diagram of the main cell and the adjacent cells; determining the adjacent cell of the main cell and the corresponding influence weight according to the three-dimensional Voronoi diagram; the comprehensive overlapping coverage difference coefficient of the primary cell is calculated and sent to the decision unit 503.
After receiving the comprehensive overlapping coverage difference coefficient of the main cell to be determined sent by the coverage difference modeling unit 502, the determining unit 503 determines whether a dual-modulation antenna is added to the main cell;
specifically, when the dual-electrical modulation antenna does not exist in the adjacent cell and the comprehensive overlapping coverage coefficient of the main cell is determined to be higher than a preset threshold value, the dual-electrical modulation antenna is determined to be used; and when the adjacent cell has the double-electric-tuning antenna or the comprehensive overlapping coverage coefficient of the main cell is lower than or equal to a preset threshold value, determining not to use the double-electric-tuning antenna.
In practical application, the device may be a single system, or a logic unit for performing different functions may be added to an existing base station.
If a logic Unit is added to the base station, the coverage simulation Unit 501, the coverage differential modeling Unit 502, the decision Unit 503, the geographic rasterization Unit 504 and the antenna model library Unit 505 may be implemented by a Central Processing Unit (CPU), a Digital Signal Processor (DSP), or a Programmable gate array (FPGA) located in the base station.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (12)
1. A method for using automatic decision for dual-tone antenna, the method comprising:
coverage simulation is carried out on coverage areas of a main cell to be judged and a cell adjacent to the main cell, and a coverage grid graph of the coverage area is generated;
performing coverage difference modeling on the main cell according to the coverage grid graph, and calculating a comprehensive overlapping coverage difference coefficient;
and determining the use of the dual-modulation antenna of the main cell by utilizing the comprehensive overlapping coverage difference coefficient.
2. The method of claim 1, wherein before performing coverage simulation on the coverage areas of the primary cell to be decided and the neighboring cells of the primary cell, the method further comprises:
geographic rasterization is carried out on the coverage area, and an antenna model is obtained;
the antenna models are two different antenna models of two frequency bands of time division code division multiple access (TD-SCDMA) and time division long term evolution (TD-LTE) supported by the double-modulation antenna;
correspondingly, the dual-electric tuning antenna simultaneously supports two systems of TD-SCDMA and TD-LTE.
3. The method of claim 2, wherein the coverage simulation of the coverage areas of the primary cell to be determined and the neighboring cells of the primary cell comprises:
and performing rasterization coverage simulation on the TD-SCDMA system and the TD-LTE system of the coverage area respectively according to a propagation model, an antenna model, engineering parameters and a geographical rasterization result, and calculating a received signal code power (PCCPCH RSCP) value of a main common control channel in a grid of the TD-SCDMA system and a PCCPCH RSCP value in the grid of the TD-LTE system by taking base stations of a main cell and an adjacent cell as central points respectively.
4. The method of claim 1, 2 or 3, wherein the modeling of the primary cell for coverage difference according to the coverage grid map, calculating an integrated overlapping coverage difference coefficient comprises:
constructing a three-dimensional Voronoi diagram of the main cell and the adjacent cell;
determining the adjacent cell of the main cell and the corresponding influence weight according to the three-dimensional Voronoi diagram;
and calculating the comprehensive overlapping coverage difference coefficient of the main cell.
5. The method according to claim 4, wherein the stereoscopic Voronoi map of the main cell and the neighbor cell is constructed by:
and constructing a three-dimensional Voronoi diagram of the main cell and the adjacent cell by utilizing correction factors generated by the antenna downward inclination angle, the antenna hanging height of the main cell and the antenna downward inclination angle and the antenna hanging height of the adjacent cell.
6. The method of claim 4, wherein the calculating the composite overlapping coverage difference coefficient comprises:
respectively calculating the overlapping coverage of the TD-SCDMA system and the overlapping coverage of the TD-LTE system according to the grid field intensity and the influence weight of each adjacent cell and the main cell;
and acquiring a comprehensive overlapping coverage difference coefficient by using the overlapping coverage of the TD-SCDMA and the overlapping coverage of the TD-LTE.
7. The method of claim 1, 2 or 3, wherein the determining the usage of the primary cell dual-tone antenna using the composite overlapping coverage difference coefficient is:
when the double-electric tuning antenna does not exist in the adjacent cell and the comprehensive overlapping coverage coefficient of the main cell is determined to be higher than a preset threshold value, the double-electric tuning antenna is used;
and when the adjacent cell has the double-electric tuning antenna or the comprehensive overlapping coverage coefficient of the main cell is lower than or equal to a preset threshold value, the double-electric tuning antenna is not used.
8. A decision device for use with a dual-tone antenna, the device comprising: the device comprises a coverage simulation unit, a coverage difference modeling unit and a judgment unit; wherein,
the coverage simulation unit is used for performing coverage simulation on coverage areas of a main cell to be judged and a cell adjacent to the main cell to generate a coverage grid map of the coverage areas;
the coverage difference modeling unit is used for performing coverage difference modeling on the main cell according to the coverage grid graph and calculating a comprehensive overlapping coverage difference coefficient;
and the judging unit is used for determining the use of the dual-modulation antenna of the main cell by utilizing the comprehensive overlapping coverage difference coefficient.
9. The apparatus of claim 8, further comprising: the system comprises a geographical rasterization unit and an antenna model library unit; wherein,
the geographic rasterizing unit is used for performing geographic rasterizing on the coverage area;
the antenna model library unit is used for storing antenna model data information;
the antenna models are two different antenna models of two frequency bands of TD-SCDMA and TD-LTE supported by the double-modulation antenna;
correspondingly, the dual-electric tuning antenna simultaneously supports two systems of TD-SCDMA and TD-LTE.
10. The apparatus according to claim 9, wherein the overlay emulation unit is specifically configured to:
and performing rasterization coverage simulation on the TD-SCDMA system and the TD-LTE system of the coverage area respectively according to a propagation model, an antenna model, engineering parameters and a geographical rasterization result, and calculating PCCPCHRSCP values in a grid of the TD-SCDMA system and PCCPCH RSCP values in the grid of the TD-LTE system by taking base stations of a main cell and an adjacent cell as central points respectively.
11. The apparatus according to claim 8, 9 or 10, wherein the coverage difference modeling unit is specifically configured to:
constructing a three-dimensional Voronoi diagram of the main cell and the adjacent cell;
determining the adjacent cell of the main cell and the corresponding influence weight according to the three-dimensional Voronoi diagram;
and calculating the comprehensive overlapping coverage difference coefficient of the main cell.
12. The apparatus according to claim 8, 9 or 10, wherein the decision unit is specifically configured to:
when the double-electric tuning antenna does not exist in the adjacent cell and the comprehensive overlapping coverage coefficient of the main cell is determined to be higher than a preset threshold value, the double-electric tuning antenna is used;
and when the adjacent cell has the double-electric tuning antenna or the comprehensive overlapping coverage coefficient of the main cell is lower than or equal to a preset threshold value, the double-electric tuning antenna is not used.
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