CN112423306B - Automatic site selection method for base station - Google Patents
Automatic site selection method for base station Download PDFInfo
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- CN112423306B CN112423306B CN202010858800.2A CN202010858800A CN112423306B CN 112423306 B CN112423306 B CN 112423306B CN 202010858800 A CN202010858800 A CN 202010858800A CN 112423306 B CN112423306 B CN 112423306B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides an automatic site selection method for a base station, which comprises the following steps: s1, calculating the corresponding covering radius of each existing station; s2, sorting the existing station addresses according to the size of the coverage overlapping area between the adjacent cells; s3, screening each existing station according to the sequence, and judging whether each existing station is reserved. The invention takes the roof of the existing electric power business hall as a candidate station address, and realizes the deployment of the base station by comprehensively considering the size of the coverage overlapping area and the network coverage rate.
Description
Technical Field
The invention relates to the technical field of base station site selection, in particular to an automatic site selection method for a base station.
Background
At present, the 230MHz frequency band is mainly applied to a data transmission radio station to undertake remote data acquisition work, and the provided rate is very low, so that the data transmission radio station can only be used for some simple communication applications, and the increasing service requirements of a smart power grid and a sensor network cannot be met. According to future planning of a national power grid, a new broadband communication technology is required to be found, and service requirements of six fields of distribution network automation, load management, power utilization information acquisition, intelligent power grid user service, emergency repair and special area video monitoring are met.
The 230MHz frequency band private network wireless communication system based on TD-LTE (Time Division-Long Term Evolution) technology provides a better solution for the requirements, and forms a new generation of flexible multi-service communication system with low power consumption, high frequency spectrum utilization rate and high reliability. The method can meet the service requirement of the power load monitoring system to the maximum extent, and simultaneously provides solid technical accumulation and application demonstration for the next generation network planning of the national power grid. In the construction process of the 230MHz frequency band private network wireless communication system, the site selection needs to be carried out on the base station to be constructed, and the accurate and efficient base station site selection method can not only reduce the workload and the station distribution cost, improve the site selection efficiency and the network coverage proportion of the base station, but also reduce the inter-cell interference, thereby being of great importance in the actual network deployment. When the existing wireless communication system carries out network construction, a general method is to obtain a candidate site by manually surveying the topography in a station distribution area, and then to use the existing simulation map to decide the selection of the site according to the coverage effect obtained by configuring a propagation model and the required coverage proportion, however, the simulation map is often lacked in practice, and the site selection method which is manually decided according to experience is not only low in efficiency and accuracy, but also is not suitable for large-scale site selection work of base stations. In the process of base station site selection, if a station site is selected and the stations are distributed, the coverage overlapping area between cells is large, so that the interference between the cells is increased, if the network coverage rate is low, the area of a blind area in a planned area is increased, and the two factors can reduce the data transmission quality and influence the wireless network signal coverage effect.
Disclosure of Invention
The invention solves the problems of low efficiency and low accuracy of manual site selection and unsuitability for large-scale site selection of base stations, and simultaneously solves the problems of large coverage overlapping area between cells or large blind area in a planned area.
In order to realize the purpose, the following technical scheme is provided:
an automatic site selection method for a base station comprises the following steps:
s1, calculating the corresponding coverage radius of each existing station address;
s2, sorting the existing station addresses according to the size of the coverage overlapping area between the adjacent cells;
s3, screening each existing station according to the sequence, and judging whether each existing station is reserved.
The invention utilizes the cell coverage radius and the station distance of the existing station address obtained by calculation to calculate the coverage overlapping area of the adjacent cell, thereby sequencing, judging and screening the candidate station addresses, and comprehensively considering the size of the coverage overlapping area and the network coverage rate to realize the deployment of the base station.
Preferably, in step S1, each existing site is an address of an existing power business hall. The network construction preferentially takes the roof of the existing electric power business hall as a candidate station site, and the existing station site is fully utilized to screen and arrange stations, so that the station arrangement cost is reduced, the realization is simple, and the station arrangement efficiency can be improved. The calculation process of the cell coverage radius is obtained by the prior art, an Okumura-Hata path loss model is selected for a 230MHz frequency band private network wireless communication system, variable values including information of transmission frequency band, transmission power, antenna height, gain, noise loss and the like are input through an operation platform, the cell coverage radius of each candidate station is calculated, and a smaller value is taken from an uplink coverage radius and a downlink coverage radius, namely the coverage radius corresponding to the station.
Preferably, the step S2 specifically includes the following steps:
s201, calculating the size of coverage overlap between each station address and all adjacent stations; the formula for calculating the coverage overlap between site 1 and site 2 is as follows: r1+R2-d1-2Wherein: r1、R2Respectively the coverage radius of site 1 and site 2; d1-2The distance between site 1 and site 2, if R1+R2-d1-2>0, if there is a coverage overlap area between site 1 and site 2, performing step S203, otherwise, if there is no coverage overlap area, performing step S202;
s202, if a certain station address does not have an adjacent station which is overlapped with the station address in a covering mode, the station address is determined to be reserved, the position is used as station arrangement selection, and station address sorting and screening are not needed;
s203, aiming at each station address with overlapping coverage, calculating R between the station address and the adjacent station with overlapping coverage1+R2-d1-2And (3) screening and sorting the accumulated values according to the sequence of the accumulated values from large to small: a, b, c, …, M.
Preferably, the step S3 specifically includes the following steps:
s301, selecting the station address a with the most front screening sequence;
s302, sequentially judging the site a and the site a satisfying Ra+Rneighbor-da-neighborWhether d is satisfied between each adjacent station of more than or equal to 0a-neighbor≤min{Ra,RneighborIn which R isaIs the coverage radius of site a, RneighborFor neighboring stations covering a radius, da-neighborIf the distance between the station address a and the adjacent station is satisfied, deleting the station address with the smaller coverage radius in the two station addresses, not distributing the station at the position, if the deleted station address is the station address a, executing the step S306, otherwise executing the step 303 after all the adjacent stations are judged;
S303，the rest satisfies Ra+Rneighbor-da-neighborSorting a _1, a _2, … and a _ N of the adjacent stations of N adjacent stations of not less than 0 according to the clockwise sequence; connecting two sites a _1 and a _2 which are ranked most at the top and the site of the site a into a triangle, if N is less than or equal to 1, executing a step S306, otherwise, executing a step S304;
s304, three sites forming a triangle are taken as site 1 in turn, and if any site 1 meets the requirements of the other two sites 2 and 3: r is1+R2-d1-2>Thoverlap1And R is1+R3-d1-3>Thoverlap2If the station address 1 meets the station address deleting condition, deleting the station address 1, not arranging the station at the position, and if more than one station address 1 meets the conditions, selecting R1Taking the smallest station address as station address 1, if the station address a is deleted, executing step S306, otherwise executing step S305; wherein R is1、R2、R3Coverage radius of site 1, site 2 and site 3, d1-2Distance between site 1 and site 2, d1-3Distance, Th, for site 1 and site 3overlap1Coverage overlap threshold, Th, for site 1 and site 2overlap2Is the coverage overlap threshold of site 1 and site 3;
s305, if the adjacent station a _1 is deleted or no station address is deleted, in the current station address a adjacent station sequencing, connecting a _2, a _3 and the station address of the station address a into a triangle; if the adjacent station a _2 is deleted, in the current station address a adjacent station sequence, connecting a _1, a _3 and the station address of the station address a into a triangle, continuing to execute the step S304 until all the N adjacent stations of the station address a are judged to be finished, and executing the step S306;
s306, selecting the next station address from the undeleted to-be-selected station addresses according to the screening sequence number, judging and screening according to the method of the station addresses a in the steps S302 to S305, and ending the station address screening until all M station addresses are judged and screened.
Preferably, the coverage overlap threshold Th of site 1 and site 2overlap1＝max{R1,R2P; the coverage overlap threshold value Th of the site 1 and the site 3overlap2＝max{R1,R3P, wherein P is a tuning parameter in the range of 0<P<1. Threshold Thoverlap1And a threshold value Thoverlap2For defining the size of the overlapping area of coverage, while the adjustment parameter P is used for adjusting the threshold value Thoverlap1And a threshold value Thoverlap2The size of the coverage overlapping area can be directly adjusted by adjusting the size of the value of the parameter P.
Preferably, the station address deleting condition is that when each base station is deleted, the difference between the network coverage before and after deletion and the threshold Th are compared in the planned areacoverComparing, if less than threshold ThcoverThen the base station is deleted. Setting a threshold ThcoverThe function of the method is to comprehensively consider the area of the blind area in the planning area.
The invention has the following beneficial effects: the coverage overlapping area of the adjacent cells is calculated by utilizing the cell coverage radius and the station distance of the existing station obtained by calculation, so that candidate stations are sorted, judged and screened, and the deployment of the base station is realized by comprehensively considering the size of the coverage overlapping area and the network coverage rate. The network construction preferentially takes the roof of the existing electric power business hall as a candidate station site, makes full use of the existing station site to screen and arrange stations, reduces the station arrangement cost, is simple to realize, and can improve the station arrangement efficiency. Setting a threshold ThcoverThe area of a blind area in a planned area is comprehensively considered; and setting an adjusting parameter P, and adjusting the size of the limited coverage overlapping area directly by adjusting the value of the adjusting parameter P, so that the adjustment is convenient.
Drawings
FIG. 1 is a flowchart of the present embodiment;
FIG. 2 is a schematic diagram of the coverage overlap area in the present embodiment;
fig. 3 is a schematic diagram of neighboring station connection according to the embodiment;
Detailed Description
The embodiment provides an automatic address selection method for a base station, which, with reference to fig. 1, includes the following steps:
s1, calculating the corresponding covering radius of each existing station;
each existing station address in step S1 is an address of an existing power business hall. The network construction preferentially takes the roof of the existing electric power business hall as a candidate station site, and the existing station site is fully utilized to screen and arrange stations, so that the station arrangement cost is reduced, the realization is simple, and the station arrangement efficiency can be improved.
S2, sorting the existing station addresses according to the size of the coverage overlapping area between the adjacent cells;
referring to fig. 2, step S2 specifically includes the following steps:
s201, calculating the size of coverage overlap between each station address and all adjacent stations; the formula for calculating the coverage overlap between site 1 and site 2 is as follows: r1+R2-d1-2Wherein: r1、R2Respectively the coverage radius of site 1 and site 2; d1-2The distance between site 1 and site 2, if R1+R2-d1-2>0, if there is a coverage overlap area between site 1 and site 2, performing step S203, otherwise, if there is no coverage overlap area, performing step S202;
s202, if a certain station address does not have an adjacent station which is overlapped with the station address in a covering mode, the station address is determined to be reserved, the position is used as station arrangement selection, and station address sorting and screening are not needed;
s203, aiming at each station address with overlapping coverage, calculating R between the station address and the adjacent station with overlapping coverage1+R2-d1-2And (3) screening and sorting the accumulated values according to the sequence of the accumulated values from large to small: a, b, c, …, M.
S3, screening each existing station according to the sequence, and judging whether each existing station is reserved or not;
referring to fig. 3, step S3 specifically includes the following steps:
s301, selecting the station address a with the most front screening sequence;
s302, sequentially judging the site a and the site a satisfying Ra+Rneighbor-da-neighborWhether or not each neighbor station of not less than 0 is satisfiedda-neighbor≤min{Ra,RneighborIn which R isaIs the coverage radius of site a, RneighborFor neighboring stations covering a radius, da-neighborIf the distance between the station address a and the adjacent station is satisfied, deleting the station address with the smaller coverage radius in the two station addresses, not distributing the station at the position, if the deleted station address is the station address a, executing the step S306, otherwise executing the step 303 after all the adjacent stations are judged;
s303, satisfying the rest Ra+Rneighbor-da-neighborSorting a _1, a _2, … and a _ N of the adjacent stations of N adjacent stations of not less than 0 according to the clockwise sequence; connecting two station addresses a _1 and a _2 which are ranked most front and the station address of the station address a into a triangle, if N is less than or equal to 1, executing a step S306, otherwise, executing a step S304;
s304, three sites forming a triangle are taken as site 1 in turn, and if any site 1 meets the requirements of the other two sites 2 and 3: r1+R2-d1-2>Thoverlap1And R is1+R3-d1-3>Thoverlap2If the station address 1 meets the station address deleting condition, deleting the station address 1, not arranging the station at the position, and if more than one station address 1 meets the conditions, selecting R1Taking the smallest station address as station address 1, if the station address a is deleted, executing step S306, otherwise executing step S305; wherein R is1、R2、R3Coverage radius of site 1, site 2 and site 3, d1-2Distance between site 1 and site 2, d1-3Distance, Th, for site 1 and site 3overlap1Coverage overlap threshold, Th, for site 1 and site 2overlap2Is the coverage overlap threshold of site 1 and site 3; overlay threshold Th for site 1 and site 2overlap1＝max{R1R2 }. P; coverage overlap threshold Th for site 1 and site 3overlap2＝max{R1,R3P, wherein P is a tuning parameter in the range of 0<P<1. Threshold Thoverlap1And a threshold value Thoverlap2For defining the size of the overlapping area of coverage, while the adjustment parameter P is used for adjusting the threshold value Thoverlap1And a threshold value Thoverlap2The size of the coverage overlapping area can be directly adjusted by adjusting the size of the value of the parameter P. The site deleting condition is that when each base station is deleted, the difference value of the network coverage before and after deletion and the threshold Th are in the planned areacoverComparing, if less than threshold ThcoverThen the base station is deleted. Setting a threshold ThcoverThe function of the method is to comprehensively consider the area of the blind area in the planning area.
S305, if the adjacent station a _1 is deleted or no station address is deleted, in the current station address a adjacent station sequencing, connecting a _2, a _3 and the station address of the station address a into a triangle; if the adjacent station a _2 is deleted, in the current station address a adjacent station sequence, connecting a _1, a _3 and the station address of the station address a into a triangle, continuing to execute the step S304 until all the N adjacent stations of the station address a are judged to be finished, and executing the step S306;
s306, selecting the next station address from the undeleted to-be-selected station addresses according to the screening sequence number, judging and screening according to the method of the station addresses a in the steps S302 to S305, and ending the station address screening until all M station addresses are judged and screened.
The invention has the following beneficial effects: the coverage overlapping area of the adjacent cells is calculated by utilizing the cell coverage radius and the station distance of the existing station obtained by calculation, so that candidate stations are sorted, judged and screened, and the deployment of the base station is realized by comprehensively considering the size of the coverage overlapping area and the network coverage rate. The network construction preferentially takes the roof of the existing electric power business hall as a candidate station site, and the existing station site is fully utilized to screen and arrange stations, so that the station arrangement cost is reduced, the realization is simple, and the station arrangement efficiency can be improved. Setting a threshold ThcoverThe area of a blind area in a planned area is comprehensively considered; and setting an adjusting parameter P, and adjusting the size of the limited coverage overlapping area directly by adjusting the value of the adjusting parameter P, so that the adjustment is convenient.
Claims (5)
1. An automatic site selection method for a base station is characterized by comprising the following steps:
s1, calculating the corresponding coverage radius of each existing station address;
s2, sorting the existing station addresses according to the size of the coverage overlapping area between the adjacent cells;
s3, screening each existing station according to the sequence, and judging whether each existing station is reserved or not; the step S3 specifically includes the following steps:
s301, selecting the station address a with the most front screening sequence;
s302, sequentially judging the site a and the site a satisfying Ra+Rneighbor-da-neighborWhether d is satisfied between each adjacent station of more than or equal to 0a-neighbor≤min{Ra,Rneighbor}，
Wherein R isaIs the coverage radius of site a, RneighborCovering radius, d, for neighboring stationsa-neighborIf the distance between the station address a and the adjacent station is satisfied, deleting the station address with the smaller coverage radius in the two station addresses, not distributing the station at the position, if the deleted station address is the station address a, executing the step S306, otherwise executing the step 303 after all the adjacent stations are judged;
s303, satisfying the rest Ra+Rneighbor-da-neighborSorting a _1, a _2, … and a _ N of the adjacent stations of N adjacent stations of not less than 0 according to the clockwise sequence; connecting two station addresses a _1 and a _2 which are ranked most front and the station address of the station address a into a triangle, if N is less than or equal to 1, executing a step S306, otherwise, executing a step S304;
s304, three sites forming a triangle are taken as site 1 in turn, and if any site 1 meets the requirements of the other two sites 2 and 3: r1+R2-d1-2>Thoverlap1And R is1+R3-d1-3>Thoverlap2If the station address 1 meets the station address deleting condition, deleting the station address 1, not arranging the station at the position, and if more than one station address 1 meets the conditions, selecting R1Taking the smallest station address as station address 1, if the station address a is deleted, executing step S306, otherwise executing step S305; wherein R is1、R2、R3Coverage radius of site 1, site 2 and site 3, d1-2Distance between site 1 and site 2, d1-3Distance, Th, for site 1 and site 3overlap1Coverage overlap threshold, Th, for site 1 and site 2overlap2Is the coverage overlap threshold of site 1 and site 3;
s305, if the adjacent station a _1 is deleted or no station address is deleted, in the current station address a adjacent station sequencing, connecting a _2, a _3 and the station address of the station address a into a triangle; if the adjacent station a _2 is deleted, in the current station address a adjacent station sequence, connecting a _1, a _3 and the station address of the station address a into a triangle, continuing to execute the step S304 until all the N adjacent stations of the station address a are judged to be finished, and executing the step S306;
s306, selecting the next station address from the undeleted to-be-selected station addresses according to the screening sorting sequence number, judging and screening according to the method of the station address a from the step S302 to the step S305, and ending the station address screening until all M station addresses are judged and screened.
2. The method as claimed in claim 1, wherein each of the existing sites in step S1 is an address of an existing power business hall.
3. The method as claimed in claim 1, wherein the step S2 comprises the following steps:
s201, calculating the size of coverage overlap between each station address and all adjacent stations; the formula for calculating the coverage overlap between site 1 and site 2 is as follows: r1+R2-d1-2Wherein: r1、R2Respectively the coverage radius of site 1 and site 2; d1-2The distance between site 1 and site 2, if R1+R2-d1-2>0, if there is a coverage overlap area between site 1 and site 2, performing step S203, otherwise, if there is no coverage overlap area, performing step S202;
s202, if a certain station address does not have an adjacent station which is overlapped with the station address, the station address is determined to be reserved, the station address is selected as a station arrangement, and station address sorting and screening are not needed;
s203, aiming at each station address with overlapping coverage, calculating R between the station address and the adjacent station with overlapping coverage1+R2-d1-2The accumulated values of the values are screened and sorted according to the sequence of the accumulated values from large to small: a, b, c, …, M.
4. A method as claimed in claim 1, wherein the overlay threshold Th for site 1 and site 2 is set tooverlap1＝max{R1R2 }. P; the coverage overlap threshold Th of site 1 and site 3overlap2＝max{R1,R3P, wherein P is a tuning parameter in the range of 0<P<1。
5. The method as claimed in claim 1, wherein the site deletion condition is that when each base station is deleted, the difference between the network coverage and the threshold Th before and after deletion is determined within the planned areacoverComparing, if less than threshold ThcoverThen the base station is deleted.
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