CN110831017A - Site selection method for power system wireless private network base station construction - Google Patents
Site selection method for power system wireless private network base station construction Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 9
- 238000010187 selection method Methods 0.000 title description 3
- 238000004891 communication Methods 0.000 claims abstract description 58
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- 238000005259 measurement Methods 0.000 claims abstract description 7
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/06—Testing, supervising or monitoring using simulated traffic
Abstract
The invention discloses a method for constructing and site selecting a wireless private network base station of a power system, which comprises the steps of transmitting radio frequency signals and recording the transmitting power at all candidate planning base station positions aiming at a target planning area, and performing radio frequency signal receiving measurement and recording received signal parameters at all terminal positions; calculating the communication coverage range of each candidate planning base station; marking the received signal parameters of all terminal positions and the communication coverage range of each candidate planning base station in a simulation system; and obtaining the optimal deployment position of the planning base station according to the planning target. The method can obtain the site selection result of the power wireless private network which has better construction adaptability, stronger interference resistance and wider coverage and meets the requirements of the power system according to the planning target requirements, has strong pertinence and definite application prospect, and meets the requirements of the power system, and has high reliability and good practicability.
Description
Technical Field
The invention belongs to the field of electrical automation, and particularly relates to a method for constructing and site-selecting a base station of a wireless private network of a power system.
Background
With the development of economic technology and the improvement of living standard of people, electric energy becomes essential secondary energy in production and life of people, and brings endless convenience to production and life of people.
And the wireless private network of the power system is one of the most important components of the power system. The power wireless private network planning comprises a base station and a terminal. However, the existing base station site selection simulation software is generally adopted in the current network planning of the wireless private network of the power system. Many planning simulation software do not consider using actual measured data for correction. However, pictures and manual information are generally adopted for simulation, so that the simulated result lacks practicability, the problem that cannot be found in the planning result often occurs after the actual station is built, the effect of the actual station building project cannot be expected, the post-reworking is needed, huge manpower and material resources are consumed, and even the situation that the pilot construction plan fails may be caused.
Disclosure of Invention
The invention aims to provide a scientific and reliable site selection method for the construction of the wireless private network base station of the power system, which meets the requirements of the power system and has high reliability and good practicability.
The invention provides a method for constructing and site-selecting a base station of a wireless private network of a power system, which comprises the following steps:
s1, aiming at a target planning region, transmitting radio frequency signals at all candidate planning base station positions, and recording the transmitting power of all candidate planning base stations;
s2, aiming at a target planning area, carrying out radio frequency signal receiving measurement at all terminal positions, and recording received signal parameters of all terminal positions;
s3, calculating the communication coverage range of each candidate planning base station according to the transmitting power of all the candidate planning base stations recorded in the step S1 and the received signal parameters of all the terminal positions recorded in the step S2;
s4, marking the received signal parameters of all the terminal positions obtained in the step S2 and the communication coverage range of each candidate planning base station obtained in the step S3 in a simulation system;
and S5, obtaining the optimal deployment position of the planning base station according to the planning target of the target planning area, thereby completing the construction and site selection of the wireless private network base station of the power system.
Step S1 is to transmit radio frequency signals at all candidate planning base station positions, specifically, to transmit radio frequency signals required in the 230MHz frequency band at all candidate planning base station positions through the radio frequency antenna.
The step S2 is to perform radio frequency signal reception measurement at all terminal positions in the target planning region, and record the received signal parameters at all terminal positions, specifically, to perform radio frequency signal reception measurement at all terminal positions, obtain the radio frequency received signal in the 223 + 235MHz frequency band, calculate the level, noise level and signal-to-noise ratio of the received signal, and then determine the level, noise level and signal-to-noise ratio:
if the ratio of the signal level to the noise level is smaller than a preset threshold value, the terminal position is considered to have larger interference under the communication frequency;
and if the ratio of the signal level to the noise level is greater than or equal to a preset threshold value, the communication quality of the terminal position at the communication frequency is determined to be reliable.
Step S3, calculating the communication coverage of each candidate planning base station, specifically, performing the communication coverage by using the following steps:
A. adopting an Okumura-Hate model to calculate the signal propagation loss of the 223-235MHz communication frequency band, and performing parameter correction according to the received signal parameters of all the terminal positions recorded in the step S2 to make the calculation result accord with the actual test condition;
B. confirming the communication coverage area of each candidate planning base station by adopting the following formula:
if (the transmission power-signal propagation loss of the candidate planning base station) > (the communication threshold value of the terminal + the communication noise), the communication quality of the position is determined to be reliable under the communication frequency, the candidate planning base station is considered to cover the position of the terminal, and the threshold is generally set to be 5-10 db;
and if the transmission power-signal propagation loss of the candidate planning base station is less than or equal to (the communication threshold value of the terminal + the communication noise), the position is determined to have larger interference and poor communication quality under the communication frequency, and the communication range of the candidate planning base station cannot cover the position of the terminal.
Step S5, obtaining an optimal planned base station deployment position according to the planning target of the target planning area, specifically, if the planning target of the target planning area is the distribution of the maximum coverage minimum base stations, first selecting a base station with the largest number of covered terminals from all the candidate base stations as a first base station to be established, marking the terminal covered by the base station as covered, then selecting a base station with the largest number of covered terminals from the remaining candidate base stations as a next base station to be established, repeating the above steps until the number of terminals which are not covered by the base station is larger than the set number (for example, larger than 100) of base stations cannot be found in one traversal, and ending the algorithm, wherein the obtained base station distribution is the distribution of the minimum base stations which can achieve the maximum coverage, thereby obtaining the optimal planned base station deployment position.
The method for constructing and site selecting the power system wireless private network base station provided by the invention simulates and generates the transmitting signal of the candidate base station by placing the simulation signal source on the candidate planning base station, combines the data such as the accurate actual measurement signal-to-noise ratio and the like obtained by each terminal frequency spectrum analysis component, enables the measuring and calculating process to be equivalent to the actual base station and terminal, obtains the more accurate coverage range of the base station, combines the power networking advantages of the LTE230M signal frequency spectrum, has better construction adaptability and stronger anti-interference performance according to the planning target requirement, has wider coverage and accords with the power system requirement.
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FIG. 1 is a schematic process flow diagram of the process of the present invention.
Detailed Description
FIG. 1 is a schematic flow chart of the method of the present invention: the invention provides a method for constructing and site-selecting a base station of a wireless private network of a power system, which comprises the following steps:
s1, aiming at a target planning region, transmitting radio frequency signals at all candidate planning base station positions, and recording the transmitting power of all candidate planning base stations; specifically, the radio frequency signals required in the 230MHz frequency band are transmitted through the radio frequency antenna at all the candidate planning base station positions
S2, aiming at a target planning area, carrying out radio frequency signal receiving measurement at all terminal positions, and recording received signal parameters of all terminal positions; specifically, the method comprises the steps of receiving and measuring radio frequency signals at all terminal positions, acquiring radio frequency receiving signals in a 223-plus-235 MHz frequency range, calculating the level, the noise level and the signal-to-noise ratio of the receiving signals, and then judging the level, the noise level and the signal-to-noise ratio:
if the ratio of the signal level to the noise level is smaller than a preset threshold value, the terminal position is considered to have larger interference under the communication frequency;
if the ratio of the signal level to the noise level is greater than or equal to a preset threshold value, the communication quality of the terminal position under the communication frequency is determined to be reliable;
in specific implementation, aiming at a region needing to be accessed to the electric power wireless private network, carrying out spectrum analysis on each terminal in the region; and (3) connecting a spectrum analyzer with a 230M antenna for signal detection, measuring a 230M signal level and a noise level of each terminal position, and when the ratio of the signal level and the noise level of a certain frequency band is lower than a threshold value, considering that the signal interference of the frequency band is large. The threshold value can be tested according to different environments, so that the threshold value with strong applicability is obtained; a higher threshold value can be selected for areas with high communication quality, and a relatively lower threshold value can be selected for areas with low communication quality requirements, but normal communication can be guaranteed; different thresholds are selected according to different environments, so that the flexibility and the adaptability are higher, and the number of base stations can be reduced by selecting the lower threshold, so that higher efficiency and accuracy can be brought;
s3, calculating the communication coverage range of each candidate planning base station according to the transmitting power of all the candidate planning base stations recorded in the step S1 and the received signal parameters of all the terminal positions recorded in the step S2; specifically, the following steps are adopted to carry out communication coverage:
A. adopting an Okumura-Hate model to calculate the signal propagation loss of the 223-235MHz communication frequency band, and performing parameter correction according to the received signal parameters of all the terminal positions recorded in the step S2 to make the calculation result accord with the actual test condition;
in specific implementation, an Okumura-Hate model is adopted to calculate the signal propagation loss of a 230MHz communication frequency band:
the theoretical propagation model adopted by the LTE230 is an Okumura-Hata model and is mainly used for calculating the frequency of 150-1500 MHz; the Okumura-Hate model is an empirical model obtained according to statistical analysis of test data, is suitable for VHF and UHF frequency bands, and is characterized in that: correcting factors for other factors such as propagation environment, terrain conditions and the like by taking the field intensity median path loss of a quasi-flat terrain metropolitan area as a reference;
the empirical formula for the Okumura-Hate model propagation loss is:
69.55+26.16lg (f) -13.82lg (ht) - α (hr) + [44.9-6.55lg (ht)) ] lg (d) where f is the carrier frequency in MHz, ht is the effective height of the transmitting antenna in m, hr is the effective height of the receiving antenna in m, d is the distance between the transmitter and the receiver in km, α hr is the correction factor for the height of the receiving antenna, the value of which depends on environmental factors, α (hr) in small and medium cities is (1.1lg (f) -0.7) hr- (1.56lg (f) -0.8) (dB), α (hr) in 8.29(lg1.54ht)2-1.1(dB) in large cities under two conditions, f is not less than 200MHz, α (hr) in 3.2 lg (11.97) 2-1.75 dB) in f 400 MHz;
different threshold values can be set in different environments, parameters and threshold correction are carried out according to the actual test result of the step S2, the coverage index is RSRP > noise + threshold, wherein RSRP is base station transmission power-path loss, and therefore a specific coverage area is determined;
B. confirming the communication coverage area of each candidate planning base station by adopting the following formula:
if (the transmission power-signal propagation loss of the candidate planning base station) > (the communication threshold value of the terminal + the communication noise), the communication quality of the position is determined to be reliable under the communication frequency, the candidate planning base station is considered to cover the position of the terminal, and the threshold is generally set to be 5-10 db;
if the transmission power-signal propagation loss of the candidate planning base station is less than or equal to (the communication threshold value of the terminal + the communication noise), the position is determined to have larger interference and poor communication quality under the communication frequency, and the communication range of the candidate planning base station cannot cover the position of the terminal;
s4, marking the received signal parameters of all the terminal positions obtained in the step S2 and the communication coverage range of each candidate planning base station obtained in the step S3 in a simulation system;
in specific implementation, the simulation system combines a google map and the actual base station of the power grid and the terminal stationing position to analyze and obtain the position information available for the base station and the information such as the transmitting power of the base station; the method comprises the steps of timely transmitting information such as measured data, geographic environment and transmitting power to a power wireless private network planning system, obtaining a planning deployment scheme through a simulation algorithm, and finally realizing visualization of position information and coverage conditions of a base station on a software platform based on a Google map, so that the base station deployment scheme is visually and conveniently seen;
s5, obtaining the optimal deployment position of the planning base station according to the planning target of the target planning area, thereby completing the construction and site selection of the wireless private network base station of the power system; specifically, for setting the maximum coverage minimum base station distribution as the planning target of the target planning area, first, a base station covering the most terminals is selected from all the candidate base stations as a first base station to be built, the terminals covered by the base station are marked as covered, then, a base station covering the most terminals which are not marked as covered is selected from the remaining candidate base stations as a next base station to be built, the above steps are repeated until a base station covering the most terminals cannot be found in one traversal and is larger than the set number (for example, larger than 100) is found, the algorithm is ended, and the obtained base station distribution is the minimum base station distribution capable of realizing the maximum coverage, so that the optimal planning base station deployment position is obtained.
Claims (5)
1. A method for constructing and site-selecting a base station of a wireless private network of a power system comprises the following steps:
s1, aiming at a target planning region, transmitting radio frequency signals at all candidate planning base station positions, and recording the transmitting power of all candidate planning base stations;
s2, aiming at a target planning area, carrying out radio frequency signal receiving measurement at all terminal positions, and recording received signal parameters of all terminal positions;
s3, calculating the communication coverage range of each candidate planning base station according to the transmitting power of all the candidate planning base stations recorded in the step S1 and the received signal parameters of all the terminal positions recorded in the step S2;
s4, marking the received signal parameters of all the terminal positions obtained in the step S2 and the communication coverage range of each candidate planning base station obtained in the step S3 in a simulation system;
and S5, obtaining the optimal deployment position of the planning base station according to the planning target of the target planning area, thereby completing the construction and site selection of the wireless private network base station of the power system.
2. The method according to claim 1, wherein the step S1 is to transmit the radio frequency signals at all candidate planned base station positions, specifically, to transmit the radio frequency signals required in the 230MHz frequency band at all candidate planned base station positions through the radio frequency antenna.
3. The method as claimed in claim 2, wherein the step S2 is performed to measure the reception of radio frequency signals at all terminal locations and record the parameters of the received signals at all terminal locations, specifically, the step S2 is performed to measure the reception of radio frequency signals at all terminal locations, obtain the radio frequency received signals in the 223 + 235MHz band, calculate the level, noise level and signal-to-noise ratio of the received signals, and then determine the level, noise level and signal-to-noise ratio:
if the ratio of the signal level to the noise level is smaller than a preset threshold value, the terminal position is considered to have larger interference under the communication frequency;
and if the ratio of the signal level to the noise level is greater than or equal to a preset threshold value, the communication quality of the terminal position at the communication frequency is determined to be reliable.
4. The method according to claim 3, wherein the step S3 of calculating the communication coverage of each candidate planning base station specifically comprises the steps of:
A. adopting an Okumura-Hate model to calculate the signal propagation loss of the 223-235MHz communication frequency band, and performing parameter correction according to the received signal parameters of all the terminal positions recorded in the step S2 to make the calculation result accord with the actual test condition;
B. confirming the communication coverage area of each candidate planning base station by adopting the following formula:
if (the transmission power-signal propagation loss of the candidate planning base station) > (the communication threshold value of the terminal + the communication noise), determining that the communication quality of the position is reliable under the communication frequency, and determining that the candidate planning base station covers the position of the terminal;
and if the transmission power-signal propagation loss of the candidate planning base station is less than or equal to (the communication threshold value of the terminal + the communication noise), the position is determined to have larger interference and poor communication quality under the communication frequency, and the communication range of the candidate planning base station cannot cover the position of the terminal.
5. The method for constructing and locating base stations of a wireless private network of an electric power system according to claim 4, wherein the optimal deployment position of the planned base station is obtained according to the planning target of the target planning area in step S5, specifically, the planning target of the target planning area is the distribution of the base stations with the minimum maximum coverage, firstly, the base station with the largest number of covered terminals is selected from all the candidate base stations as the first base station to be constructed, the terminal covered by the base station is marked as covered, then, the base station with the largest number of covered terminals is selected from the remaining candidate base stations as the next base station to be constructed, the above steps are repeated until the number of terminals which are not covered in one traversal is larger than the base stations with the set number, the algorithm is finished, and the obtained base station distribution is the distribution of the minimum base stations which can realize the maximum coverage, thereby obtaining the optimal planned base station deployment position.
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| CN115314835A (en) * | 2021-11-03 | 2022-11-08 | 北京广厦网络技术股份公司 | Base station configuration method and device, electronic equipment and storage medium |
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