CN109936855B - Method, device, equipment and medium for inverting precipitation distribution by using base station signals - Google Patents
Method, device, equipment and medium for inverting precipitation distribution by using base station signals Download PDFInfo
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Abstract
The embodiment of the invention discloses a method, a device, equipment and a medium for inverting precipitation distribution by using base station signals, wherein the method comprises the following steps: according to a whole-grid base station grid diagram of precipitation distribution, acquiring measurement information which is used for determining precipitation and is summarized by each base station in each grid in the whole-grid base station grid diagram, wherein the measurement information comprises: the measurement report reported by each terminal meeting the precipitation sampling condition in the base station; aiming at each base station, acquiring attenuation of each terminal in the base station caused by rainfall according to the attribute information of the base station, the parameter information which is corresponding to the base station and is used for measuring rainfall and a measurement report; acquiring rainfall corresponding to the base station according to attenuation of all terminals in the base station caused by rainfall; and determining the rainfall of the grating area according to the rainfall corresponding to all the base stations in each grating so as to obtain the rainfall distribution information corresponding to the whole network range. The method does not need to install special measuring equipment in the measurement of precipitation distribution, and can effectively reduce the cost.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method, a device, equipment and a medium for inverting precipitation distribution by using base station signals.
Background
There are various methods for measuring precipitation in the prior art, and a common measurement method includes: the method for measuring by adopting the distributed rain gauges, the method for measuring by adopting a weather radar or a weather satellite and the method for measuring by adopting a raindrop spectrum. Several methods are generally described below.
(1) A method for rain gauge measurement. Rain gauges are used to measure the amount of precipitation in a particular area over a period of time. Its advantages are simple operation and high measuring precision. However, the rain gauges are only limited to be observed on a single point, and if regional precipitation distribution is required to be observed, a very dense rain gauge net needs to be laid, which is difficult; in addition, in remote areas with rare people and areas with complex terrain, measuring equipment is difficult to widely distribute and the maintenance of the equipment is also difficult; in addition, the rain gauge has high instrument layout requirements, and needs to be arranged on the air and ground far away from buildings and trees, errors and even errors are easy to occur in manual reading and data transmission of a rain gauge station, and the measurement accuracy is difficult to ensure under the conditions of strong wind, low temperature and strong rainfall.
(2) A method for meteorological radar measurement. The meteorological radar transmits electromagnetic waves to a detection area, and the position of precipitation and the precipitation intensity are calculated by detecting the intensity change of radar echoes. Its advantages are wide range of remote sensing, and high space-time resolution of observed data. However, the radar is based on the measurement of the radar echo intensity to invert the rainfall intensity, and the electromagnetic wave is attenuated to a certain extent in the propagation process and is easily interfered by various factors, such as the influence of the terrain, and particularly for the detection of near-ground rainfall, the radar is easily interfered by ground obstacles and clutter to cause errors. In addition, the accuracy of radar measurement of precipitation also depends on the uncertainty of the Z-R relation and the type of precipitation, and large errors are caused when wind shear is encountered.
(3) A method for meteorological satellite measurement. Satellite detection of precipitation is also a method by indirect measurement. In recent years, the technology for detecting precipitation distribution by using satellite-borne satellites is rapidly developed, and a plurality of algorithms are provided. Compared with radar monitoring precipitation, the satellite remote sensing detection can realize precipitation detection in a wider global range, including precipitation observation in areas such as oceans and deserts, and the problem of uneven spatial distribution of the rain gauge and the radar is solved. However, the satellite is easily interfered by cloud layers when measuring rainfall, so that the measurement precision is poor and the time resolution is not high.
(4) A method for raindrop spectrum measurement. The raindrop spectrum mainly reflects the microscopic physical process of precipitation, the development and evolution process of precipitation can be deeply known through researching the raindrop spectrum, and the precipitation mechanism is revealed. The rainfall is observed through the raindrop spectrum, the rainfall is obtained through theoretical calculation from a microscopic angle mainly through various raindrop spectrum models, the calculation result is ideal, and due to the variability of the type and the intensity of the rainfall and the difference of the regionality, the raindrop spectrum is greatly changed, so that the rainfall is estimated through the raindrop spectrum, the rainfall is always required to be estimated according to the field situation, and otherwise, errors are easily caused.
In summary, how to realize the measurement of precipitation distribution without installing a measuring device and increasing the maintenance and collection workload becomes a problem which needs to be solved urgently at present.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a medium for inverting precipitation distribution by using base station signals.
In a first aspect, an embodiment of the present invention provides a method for inverting precipitation distribution by using a base station signal, where the method includes:
according to a whole-grid base station grid map of precipitation distribution, acquiring measurement information which is used for determining precipitation and is collected by each base station in each grid in the whole-grid base station grid map, wherein the measurement information collected by each base station comprises: the measurement report reported by each terminal meeting the precipitation sampling condition in the base station;
aiming at each base station, acquiring the attenuation of electromagnetic signals brought by rainfall of each terminal in the base station according to the attribute information of the base station, the parameter information corresponding to the base station and used for measuring the rainfall and the measurement report reported by each terminal in the base station;
acquiring rainfall corresponding to the base station according to attenuation of electromagnetic signals brought by rainfall of all terminals in the base station;
and determining the rainfall of the grating area according to the rainfall corresponding to all the base stations in each grating so as to obtain the rainfall distribution information corresponding to the whole network base station range.
In a second aspect, an embodiment of the present invention provides an apparatus for inverting precipitation distribution by using a base station signal, including:
the first obtaining unit is used for obtaining measurement information, which is used for determining rainfall and is collected by each base station in each grid in a whole-grid base station grid map according to the whole-grid base station grid map of rainfall distribution, wherein the measurement information collected by each base station comprises: the measurement report reported by each terminal meeting the precipitation sampling condition in the base station;
a second obtaining unit, configured to obtain, for each base station, attenuation of an electromagnetic signal caused by rainfall for each terminal in the base station according to attribute information of the base station, parameter information corresponding to the base station and used for measuring rainfall, and a measurement report reported by each terminal in the base station;
a third obtaining unit, configured to obtain rainfall corresponding to the base station according to attenuation of electromagnetic signals caused by rainfall for all terminals in the base station;
and the determining unit is used for determining the rainfall of the grating area according to the rainfall corresponding to all the base stations in each grating so as to obtain the rainfall distribution information in the range corresponding to the base stations in the whole network.
In a third aspect, an embodiment of the present invention provides an apparatus for inverting precipitation distribution by using a base station signal, including:
at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of the first aspect of the embodiments described above.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which computer program instructions are stored, where the computer program instructions, when executed by a processor, implement the method of the first aspect in the foregoing embodiments.
Compared with the rainfall measurement method in the prior art, the method, the device, the equipment and the medium for inverting the rainfall distribution by using the base station signals, provided by the embodiment of the invention, have the advantages that special measurement equipment is not required to be installed in the implementation process, the maintenance cost and the collection workload are not increased, and the cost is well reduced.
In addition, the method of the embodiment of the invention can ensure the measurement precision by dividing the base stations of the whole network into each grid and further determining the rainfall capacity of the grid based on the measurement information sent by the base stations in the grids.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings may be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for inverting precipitation distribution by using base station signals according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for inverting precipitation distribution using base station signals according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for inverting precipitation distribution by using base station signals according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating an apparatus for inverting precipitation distribution by using a base station signal according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Fig. 1 is a schematic flow chart of a method for inverting precipitation distribution by using a base station signal according to an embodiment of the present invention, as shown in fig. 1, the method of the embodiment includes:
it can be understood that, before the implementation of the method of the embodiment, the whole-network base station can be previously classified into a plurality of grid areas according to the geographical location information of the whole-network base station, so as to obtain the grid map of the whole-network base station.
101. According to a whole-grid base station grid map of precipitation distribution, acquiring measurement information which is used for determining precipitation and is collected by each base station in each grid in the whole-grid base station grid map, wherein the measurement information collected by each base station comprises: and the base station reports the measurement report reported by each terminal which meets the rainfall sampling condition.
For example, in this embodiment, the measurement information sent by each base station in each grid may be obtained from an Operation and Maintenance Center (OMC).
102. And aiming at each base station, acquiring the attenuation of each terminal in the base station caused by rainfall according to the attribute information of the base station, the parameter information corresponding to the base station and used for measuring the rainfall and the measurement report reported by each terminal in the base station.
In this embodiment, the attenuation in step 102 is the attenuation of electromagnetic signals caused by rainfall.
103. And acquiring the rainfall corresponding to the base station according to the attenuation of all the terminals in the base station caused by rainfall.
For example, the rainfall intensity measured by the terminal can be obtained according to the attenuation of the terminal caused by rainfall; and then according to the rainfall intensity measured by all terminals in the base station, acquiring the rainfall corresponding to the base station.
104. And determining the rainfall of the grating area according to the rainfall corresponding to all the base stations in each grating so as to obtain the rainfall distribution information in the corresponding whole network range (namely obtaining the rainfall distribution information in the corresponding whole network base station range).
Compared with the rainfall measurement method in the prior art, the method of the embodiment does not need to install special measurement equipment in the implementation process, does not increase the maintenance cost and the collection workload, and well reduces the cost.
In addition, the method can divide the whole-network base station into a plurality of grid areas according to the geographical position information of each base station in the whole-network base station in advance, so that a grid graph of the whole-network base station is obtained, the rainfall capacity of the grid is determined according to the measurement information gathered by all the base stations in the grid, and the measurement precision can be guaranteed.
Fig. 2 is a schematic flow chart of a method for inverting precipitation distribution by using a base station signal according to another embodiment of the present invention, as shown in fig. 2, the method of this embodiment includes:
201. and acquiring measurement information, which is used for determining rainfall and is summarized by each base station in each grid in the whole-network base station grid map, from the OMC according to the whole-network base station grid map of rainfall distribution.
Specifically, the measurement information summarized by each base station includes: and the base station reports the measurement report reported by each terminal which meets the rainfall sampling condition.
In this embodiment, the terminal meeting the precipitation sampling condition may be a fresnel region which is not covered by the base station.
202. And aiming at each terminal in the base station, acquiring the path loss of the terminal according to the attribute information of the base station and the measurement report of the terminal.
For example, the attribute information of the base station may include: power headroom, noise constant, receive diversity gain, uplink signal-to-noise ratio, number of physical resource block uses, etc.
203. And acquiring a rain attenuation rate corresponding to the terminal, namely attenuation caused by rainfall (namely attenuation of electromagnetic signals caused by rainfall) according to the path loss and the parameter information which is used for measuring the rainfall and corresponds to the base station.
The parameter information in this embodiment may include: parameters corresponding to terrain factors, weather parameters in a non-rainfall state, electromagnetic attenuation parameters representing non-interference conditions, and the like.
204. And acquiring the rain intensity of the terminal according to the rain attenuation rate corresponding to the terminal.
For example, in a specific implementation process, the rain intensity R of the terminal may be obtained according to a formula one;
the formula I is as follows: r = (gamma) R /k) α ；
Wherein k and α are constants, γ R The rain attenuation rate corresponding to the terminal is the attenuation caused by rainfall;
according to R PathLoss ＝23+PHR-(Noise-Gain+ULSINR+10lg(12×NUM PRB ) Obtaining a path loss R of the terminal) PathLoss ；
According to gamma R ＝R pathloss -R base +C env +C weather Obtaining the rain attenuation rate gamma corresponding to the terminal R ；
That is, belong toThe sexual information may include: power headroom PHR, noise constant Noise, receiving diversity Gain, uplink signal to Noise ratio UL SINR, physical resource block usage NUM PRB Etc.;
the parameter information includes: parameter C representing correspondence of topographic factors env Weather parameter C representing non-rainfall state weather Represents the electromagnetic attenuation parameter R under the condition of no interference base And so on.
205. And traversing all terminals in the base station, and acquiring the rainfall corresponding to the base station according to the rainfall intensity measured by all terminals in the base station.
For example, the rainfall measured by all terminals in the base station may be averaged or weighted to obtain the rainfall corresponding to the base station.
206. And traversing all base stations in each grid, and determining the rainfall of the grid area according to the rainfall corresponding to all the base stations in each grid so as to obtain the rainfall distribution information corresponding to the whole network range.
For example, in this embodiment, the rainfall amount corresponding to all the base stations in each grid may be averaged/weighted to obtain the rainfall amount of the grid area.
The method for measuring precipitation through the communication base station in the embodiment is similar to that of a radar, and is indirect measurement. However, in the present embodiment, the precipitation intensity is calculated by detecting the attenuation of the near-ground electromagnetic wave. The communication base station has wide distribution range, large density and multiple signal frequencies, thereby being capable of providing continuous, real-time and accurate near-ground rainfall monitoring, having small workload of manual maintenance and having the condition of carrying out measurement in all weather.
The accuracy of the measurement by the method depends on precipitation forecast models, such as K-R models and the distribution of microwave link equipment. The method revises the exponential relation between the microwave rain attenuation rate and the rain intensity under the frequency of 0.5-35 GHz by using the standard measurement result of the rain gauge, amplifies the attenuation caused by rainfall by using the idea of grid superposition, and improves the measurement precision to a certain extent.
Particularly, in the present embodiment, interference due to environmental reasons is further eliminated by the multi-metadata fusion.
In addition, in an optional implementation scenario, before obtaining the measurement information summarized by each base station in each grid from the OMC in the foregoing 201, the method shown in fig. 2 may further include the following steps that are not shown in the figure:
and A01, OMC receives the measurement report sent by each base station, and determines whether the terminal reporting the measurement report is the terminal meeting the rainfall sampling condition according to the time lead Ta corresponding to each measurement report.
A02, if yes, judging whether the measurement report belongs to the measurement report in the preprocessing condition;
and A03, if not, using the measurement report as the measurement information gathered by the base station.
The terminal meeting the precipitation sampling condition in this embodiment may be a fresnel region where the terminal is not covered by the base station.
In particular, if the terminal does not comply with the precipitation sampling conditions, the measurement report may be directly ignored during the precipitation measurement process.
In addition, the measurement reports belonging to the preprocessing condition are mainly screened measurement reports, that is, measurement reports caused by defects of the base station class are discarded and are not used as measurement information for determining the rainfall.
The execution subject of the method shown in fig. 1 and fig. 2 may be the OMC, or may be executed by a separate computing processing device, such as a rain server, after obtaining the measurement information from the OMC.
The method uses the terminal measurement report of the mobile communication system to obtain the measurement of the atmospheric condensate on the attenuation of the radio electromagnetic wave; further utilizing the expected unbiased estimation to obtain an unbiased estimation of the rain decay rate; the rainfall distribution can be measured in a wider range without installing a rain gauge and increasing the maintenance and collection workload; the measurement accuracy can be better than that of radar measurement in the prior art, and is better than that of a rain gauge under specific conditions, so that all-weather measurement and acquisition are realized.
Particularly, in the embodiment, the start-stop time of rain can be determined by using the measurement report.
In order to better understand the method shown in fig. 1 and 2, the method of the embodiment of the present invention is described in detail below with reference to the prior art model.
1) Rain attenuation model for atmospheric water condensate
When electromagnetic waves propagate in the atmosphere, the electromagnetic waves are affected by particles in the atmosphere, and scattering, absorption, depolarization and other effects are generated to attenuate electromagnetic wave energy. If water condensate is mixed in the atmosphere, the influence of the water condensate on electromagnetic waves is more remarkable, particularly in a microwave band and a wave band with shorter wavelength, the electric conductivity of rainwater is higher, the size of raindrops is close to or larger than the wavelength, and when electric waves are transmitted through a rain area, the raindrops absorb part of energy and scatter incident waves in all directions. This attenuation of electromagnetic waves, primarily due to water droplets, is called rain attenuation. In practice, rain attenuation is a function of precipitation intensity, distance of microwave links, and the like. Based on the characteristic, the embodiment of the invention inverts the precipitation intensity by using the attenuation of precipitation on the transmission signal between the base station and the user UE.
At present, communication base station has wide distribution range, and the characteristics that density is big are cellular distribution network generally, and the distance generally can not be too big between base station and the base station, and tens meters are to one or two kilometers within ranges, and communication signal between the base station can reflect through the change of electromagnetic wave power when receiving precipitation to influence the appearance decay. In the embodiment of the invention, based on the Mie scattering principle, an empirical mode (ITU-R P.838-3) given by the International Telecommunication Union (ITU) is utilized under the condition that raindrops are spherical, and according to a rain attenuation forecasting model given by ITU-R P.838-2:
γ R ＝kR α (1)
where k and alpha are parameters mainly dependent on frequency, elevation angle, and polarization angle, and R is rain intensity (mm/h), and gamma R Is the rain attenuation ratio (dB/km). According to ITU-R p.838.3 recommendations, k and α can be calculated using the following equations:
wherein a, b, c, m are parameters and f is the microwave frequency.
The formula (1) reflects the exponential relationship between the signal attenuation and the rain intensity, is simple and convenient to calculate, can avoid complex theoretical calculation, is suitable for electromagnetic waves of all frequency bands in middle and high latitude areas in China, and has good calculation accuracy.
2) Terminal measurement reporting
When the terminal is in a service connection state, in order to ensure that the terminal does not drop when moving in the cellular network, the terminal needs to measure the levels of the cell and the potential target neighboring cells at the same time, so as to switch to the target neighboring cell with a good enough level in time before the level of the cell drops to be unacceptable, thereby realizing continuity of connection. The mechanism is equally effective for all Mobile Communication systems including Global System for Mobile communications (GSM), universal Mobile Telecommunications System (UMTS), and Long Term Evolution (LTE). Taking LTE as an example, a terminal may periodically (e.g., 2 seconds) measure the level (e.g., RSRP) of the cell and the target neighboring cell, and Report the level to a base station in the form of a Measurement Report (MR), and the base station may collect the MRs, perform necessary preprocessing, and then summarize the MRs to an OMC in a larger period (e.g., 15 minutes).
In the embodiment of the present invention, multiple parameters included in the MR are used as a calculation basis to obtain a more accurate actual path loss value. The measurement results of the approximately uniformly distributed terminals in the same cell to the same neighbor cell pair meet the independent and uniformly distributed requirements. The large number of terminals dispersed throughout the network creates a seamless measurement of the base station coverage geographical area.
In practice, due to the presence of the fresnel zone, when the user is too close to the outdoor macro station, there is a significant error in the reported MR data. And once the user is too far away from the base station, the environmental interference is too large, which is not beneficial to extracting the attenuation caused by rainfall in the later period. Therefore, in this embodiment, the user is roughly screened by Time advance (Ta for short), and the sampling points too close to or too far from the site are screened. From experimental empirical data of a plurality of times, the sampling point of Ta between 3 and 10 is reported to meet the sampling condition.
3) Path loss and rain intensity calculation
According to the aforementioned formula (1), the rain intensity R can be obtained from the formula (3), where k and α are constants which can be obtained by table lookup. The rain intensity of each cell can be obtained by only obtaining the gamma value of the position of each cell according to the MR calculation of the mobile communication network, so that the whole target geographical area can be expanded.
R＝(γ R /k) α (3)
As above, a large number of terminal measurements satisfy the required statistical properties, the measurement expectation falls around the primary serving cell to conform to an unbiased estimation, and the actual path loss can be represented by the following formula.
R PathLoss ＝23+PHR-(Noise-Gain+ULSINR+10lg(12×NUM PRB )) (4)
Wherein the content of the first and second substances,
for the path loss, in practical applications, the Reference Signal Receiving Power (RSRP) is not accurate, so the method of the above equation (4) is adopted.
In equation (4), PHR is the power margin, noise is the system self-borne Noise (constant), gain is the receive diversity Gain (constant: e.g., 9dB for 8 antennas and 3dB for 2 antennas), and UL SINR is the uplink signal-to-Noise ratio, NUM PRB Physical resource block usage number (one parameter of LTE).
The value obtained by the above formula (4) is an average road attenuation value, i.e., a road loss, which is not onlyCaused solely by rainfall, and factors such as spatial free loss, fast fading, multipath interference, and natural environment blockage. In order to extract the required attenuation due to rainfall, the sunny value is taken as R in this embodiment base . And introducing multiple meteorological factors such as temperature, humidity, rain gauge data, weather radar data, satellite cloud pictures and other data as correction factors to restore signal attenuation caused by the actual environment as much as possible. Finally, the attenuation caused by rainfall:
γ R ＝R pathloss -R base +C env +C weather (5)。
4) Amplification of rainfall attenuation
According to the ITU-R P.838-3 specification, the embodiment of the invention performs mathematical modeling on Matlab2017 to obtain a theoretical attenuation value caused by rainfall of a user in a range of 1km under the existing network condition (1.9-2.1 Ghz). The theoretical attenuation value and the actually measured data have errors, and the attenuation value is larger than the theoretical attenuation value due to the fact that more or less accumulated water exists on the actual base station antenna. However, attenuation caused by rainfall is still small, and the requirement of the scheme on precision cannot be met under the current network acquisition condition. Therefore, the characteristic that the rainfall value is the same in a small range is utilized. The whole network base station is divided into N grids 1km x 1km. And superposing the attenuations obtained by the base stations to achieve the purpose of amplifying the attenuation caused by rainfall.
Fig. 3 is a schematic structural diagram of an apparatus for inverting precipitation distribution by using base station signals according to an embodiment of the present invention, as shown in fig. 3, the apparatus of this embodiment includes:
the first obtaining unit 41 is configured to obtain, according to a whole-grid base station grid map of precipitation distribution, measurement information for determining rainfall, which is summarized by each base station in each grid in the whole-grid base station grid map, where the measurement information summarized by each base station includes: a measurement report reported by each terminal meeting rainfall sampling conditions in the base station;
the second obtaining unit 42 is configured to, for each base station, obtain, according to attribute information of the base station, parameter information corresponding to the base station and used for measuring rainfall, and a measurement report reported by each terminal in the base station, attenuation of an electromagnetic signal caused by rainfall of each terminal in the base station;
the third obtaining unit 43 is configured to obtain rainfall corresponding to the base station according to attenuation of electromagnetic signals caused by rainfall of all terminals in the base station;
the determining unit 44 is configured to determine the rainfall of the grid area according to the rainfall corresponding to all the base stations in each grid, so as to obtain the rainfall distribution information within the range of the corresponding whole-network base station.
In an alternative implementation manner, the first obtaining unit 41 may be specifically configured to obtain, from the OMC, measurement information summarized by each base station in each of the grids.
In another optional implementation manner, the second obtaining unit 42 may specifically be configured to: acquiring the path loss of the terminal according to the attribute information of the base station and the measurement report of the terminal; acquiring attenuation of the terminal caused by rainfall according to the path loss and the parameter information which is used for measuring the rainfall and corresponds to the base station; acquiring the rainfall intensity measured by the terminal according to the attenuation of the electromagnetic signal brought by rainfall of the terminal;
and acquiring the rainfall corresponding to the base station according to the rainfall intensity measured by all terminals in the base station.
For example, according to R = (γ) R /k) α Acquiring the rain intensity R of the terminal;
wherein k and α are constants, γ R Attenuation of the terminal caused by rainfall.
Further, according to R PathLoss ＝23+PHR-(Noise-Gain+ULSINR+10lg(12×NUM PRB ) Obtaining a path loss R of the terminal PathLoss ；
According to gamma R ＝R pathloss -R base +C env +C weathe Obtaining attenuation gamma of the terminal caused by rainfall R ；
Wherein the attribute information includes: power headroom PHR, noise constant Noise, receptionDiversity Gain, uplink signal-to-noise ratio (UL SINR), and physical resource block usage Number (NUM) PRB ；
The parameter information includes: parameter C representing correspondence of topographic factors env Weather parameter C representing non-rainfall state weather Represents the electromagnetic attenuation parameter R under the condition of no interference base 。
In a third optional implementation manner, the third obtaining unit 43 may be specifically configured to average/weight the rainfall measured by all terminals in the base station, and obtain the rainfall corresponding to the base station.
For example, the determining unit 44 may be specifically configured to average/weight the rainfall of all base stations in each grid, so as to obtain the rainfall of the grid area.
In a fifth optional implementation scenario, the first obtaining unit 41 is further configured to receive a measurement report sent by each base station, and determine, according to Ta corresponding to each measurement report and time point information of the measurement report, whether a terminal reporting the measurement report is a terminal meeting a precipitation sampling condition; if yes, judging whether the measurement report belongs to the measurement report in the preprocessing condition; and if not, taking the measurement report as the measurement information summarized by the base station.
The device of this embodiment can realize the measurement to precipitation distribution, for prior art, need not install special measuring equipment, and need not maintain reduce cost.
In addition, the method for inverting the precipitation distribution by using the base station signal according to the embodiment of the present invention described in conjunction with fig. 1 or fig. 2 may be implemented by an apparatus for inverting the precipitation distribution by using the base station signal.
Fig. 4 is a schematic diagram illustrating a hardware structure of an apparatus for inverting precipitation distribution by using a base station signal according to an embodiment of the present invention.
An apparatus for inverting precipitation distribution using base station signals may include a processor 501 and a memory 502 having stored computer program instructions.
Specifically, the processor 501 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing embodiments of the present invention.
The processor 501 reads and executes the computer program instructions stored in the memory 502 to implement any one of the above-described embodiments of the method for inverting precipitation distribution using base station signals.
In one example, the apparatus for inverting precipitation distributions using base station signals may further include a communication interface 503 and a bus 510. As shown in fig. 4, the processor 501, the memory 502, and the communication interface 503 are connected via a bus 510 to complete communication therebetween.
The communication interface 503 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present invention.
The bus 510 includes hardware, software, or both to couple the components of the apparatus that invert precipitation distributions using the base station signals to each other. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 510 may include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
In addition, in combination with the method for inverting precipitation distribution by using base station signals in the foregoing embodiments, embodiments of the present invention may be implemented by providing a computer-readable storage medium. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the above-described embodiments of a method for inverting precipitation distribution using base station signals.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps, after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A method for inverting precipitation distributions using base station signals, the method comprising:
according to a whole-grid base station grid map of precipitation distribution, acquiring measurement information which is collected by each base station in each grid in the whole-grid base station grid map and is used for determining precipitation amount, wherein the measurement information collected by each base station comprises: the measurement report is reported by each terminal meeting precipitation sampling conditions in the base station, and the measurement report is used for obtaining the measurement of the atmospheric condensate on the radio electromagnetic wave attenuation;
aiming at each base station, acquiring the attenuation of electromagnetic signals brought by rainfall of each terminal in the base station according to the attribute information of the base station, the parameter information corresponding to the base station and used for measuring the rainfall and the measurement report reported by each terminal in the base station;
acquiring rainfall corresponding to the base station according to attenuation of electromagnetic signals brought by rainfall of all terminals in the base station;
determining the rainfall of the grating area according to the rainfall corresponding to all the base stations in each grating so as to obtain the rainfall distribution information in the range corresponding to the base stations in the whole network;
the acquiring, according to the attribute information of the base station, the parameter information for measuring rainfall corresponding to the base station, and the measurement report reported by each terminal in the base station, the attenuation of the electromagnetic signal caused by rainfall at each terminal in the base station includes:
for each terminal in the base station, acquiring the path loss of the terminal according to the attribute information of the base station and the measurement report of the terminal; acquiring the attenuation of electromagnetic signals brought by rainfall of the terminal according to the path loss and the parameter information which is used for measuring the rainfall and corresponds to the base station;
the acquiring the path loss of the terminal according to the attribute information of the base station and the measurement report of the terminal, and acquiring the attenuation of the electromagnetic signal brought by rainfall of the terminal according to the path loss and the parameter information for measuring the rainfall corresponding to the base station, includes:
according to R PathLoss ＝23+PHR-(Noise-Gain+ULSINR+10lg(12×NUM PRB ) Obtaining a path loss R of the terminal PathLoss ；
According to gamma R ＝R pathloss -R base +C env +C weather And obtaining attenuation gamma of the electromagnetic signal of the terminal caused by rainfall R ；
Wherein the attribute information includes: power headroom PHR, noise constant Noise, receiving diversity Gain, uplink signal to Noise ratio UL SINR, physical resource block usage number NUM PRB ；
The parameter information includes: parameter C corresponding to terrain factor env Weather parameter C representing non-rainfall state weather Represents the electromagnetic attenuation parameter R under the condition of no interference base 。
2. The method of claim 1, wherein the obtaining measurement information for determining rainfall gathered by each base station in each grid in the grid map of the whole-grid base stations comprises:
and acquiring the measurement information summarized by each base station in each grid from an Operation and Maintenance Center (OMC).
3. The method of claim 1, wherein the obtaining the rainfall corresponding to the base station according to the attenuation of the electromagnetic signals brought by rainfall of all the terminals in the base station comprises:
acquiring the rainfall intensity measured by the terminal according to the attenuation of the electromagnetic signal brought by rainfall of the terminal;
and acquiring the rainfall corresponding to the base station according to the rainfall intensity measured by all terminals in the base station.
4. The method according to claim 3, wherein the obtaining the rainfall intensity measured by the terminal according to the attenuation of the electromagnetic signal brought by the rainfall of the terminal comprises:
according to R = (gamma) R /k) α Acquiring the rain intensity R of the terminal;
wherein k and α are constants, γ R And attenuation of electromagnetic signals brought by rainfall for the terminal.
5. The method according to claim 3, wherein the obtaining the rainfall corresponding to the base station according to the rainfall intensities measured by all terminals in the base station comprises:
averaging/weighting the raininess measured by all terminals in the base station to obtain the rainfall corresponding to the base station;
and/or the presence of a gas in the atmosphere,
the determining the rainfall capacity of the grid area according to the rainfall capacity corresponding to all the base stations in each grid comprises the following steps:
and averaging/weighting rainfall corresponding to all base stations in each grid to obtain the rainfall of the grid area.
6. The method of claim 2, wherein prior to obtaining the aggregated measurement information for each base station in each of the grids, the method further comprises:
receiving a measurement report sent by each base station, and determining whether a terminal reporting the measurement report is a terminal meeting rainfall sampling conditions or not according to the time advance Ta corresponding to each measurement report;
if yes, judging whether the measurement report belongs to the measurement report in the preprocessing condition;
and if not, taking the measurement report as the measurement information summarized by the base station.
7. The method of claim 6, wherein the terminal meeting the precipitation sampling condition is a Fresnel region which is not covered by the base station.
8. An apparatus for inverting precipitation distribution using a base station signal, comprising:
the first obtaining unit is configured to obtain, according to a whole-grid base station grid map of precipitation distribution, measurement information for determining rainfall collected by each base station in each grid in the whole-grid base station grid map, where the measurement information collected by each base station includes: the measurement report is reported by each terminal meeting precipitation sampling conditions in the base station, and the measurement report is used for obtaining the measurement of the atmospheric condensate on the radio electromagnetic wave attenuation;
a second obtaining unit, configured to obtain, for each base station, attenuation of an electromagnetic signal caused by rainfall for each terminal in the base station according to attribute information of the base station, parameter information corresponding to the base station and used for measuring rainfall, and a measurement report reported by each terminal in the base station;
a third obtaining unit, configured to obtain rainfall corresponding to the base station according to attenuation of electromagnetic signals caused by rainfall for all terminals in the base station;
the determining unit is used for determining the rainfall of the grating area according to the rainfall corresponding to all the base stations in each grating so as to obtain the rainfall distribution information corresponding to the whole network base station range;
the second obtaining unit is specifically configured to:
for each terminal in the base station, acquiring the path loss of the terminal according to the attribute information of the base station and the measurement report of the terminal; acquiring attenuation of electromagnetic signals brought by rainfall of the terminal according to the path loss and the parameter information which corresponds to the base station and is used for measuring the rainfall;
the second obtaining unit is further specifically configured to:
according to R PathLoss ＝23+PHR-(Noise-Gain+ULSINR+10lg(12×NUM PRB ) Obtaining a path loss R of the terminal) PathLoss ；
According to gamma R ＝R pathloss -R base +C env +C weather And obtaining attenuation gamma of the electromagnetic signal of the terminal caused by rainfall R ；
Wherein the attribute information includes: power headroom PHR, noise constant Noise, receiving diversity Gain, uplink signal to Noise ratio UL SINR, physical resource block usage NUM PRB ；
The parameter information includes: parameter C corresponding to terrain factor env Weather parameter C in non-rainfall state weather Represents the electromagnetic attenuation parameter R under the condition of no interference base 。
9. An apparatus for inverting precipitation distribution using base station signals, comprising:
at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of any of claims 1-7.
10. A computer-readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the method of any one of claims 1-7.
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| CN113466969B (en) * | 2021-05-11 | 2023-10-27 | 深圳捷豹电波科技有限公司 | Rainfall monitoring method, receiving equipment, rainfall monitoring system and storage medium |
| CN114828077B (en) * | 2022-05-19 | 2023-09-01 | 中国人民解放军国防科技大学 | Regional rainfall field reconstruction method based on cellular mobile communication network |
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