CN114584992B - Alternative station address acquisition method for measurement and control station and measurement and control station layout planning method - Google Patents
Alternative station address acquisition method for measurement and control station and measurement and control station layout planning method Download PDFInfo
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Abstract
The invention provides a method for acquiring an alternative station address of a measurement and control station, which comprises the following steps: s1, acquiring a high-dynamic terminal target track corresponding to the arrangement of a measurement and control station, uniformly segmenting the high-dynamic terminal target track, and generating a preset number of alternative station addresses for each segment; s2, adjusting the antenna pointing direction of the measurement and control station of each alternative station address to be the optimal pointing direction, so that the measurement and control station of the alternative station address can obtain the antenna pointing direction of the maximum communication duration of the high-dynamic terminal; s3, counting the communicable time period of each alternative station address, wherein the communicable time period of each alternative station address is a time period which meets the communication distance between a measurement and control station and a high-dynamic terminal, can be covered by a high-dynamic terminal antenna and can be covered by the high-dynamic terminal; s4, selecting a preset number of alternative station addresses according to the size of the communicable time period and all the alternative station addresses.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to the field of communication between a high-dynamic terminal and a measurement and control station, and more particularly relates to a method for acquiring an alternative station address of the measurement and control station aiming at the high-dynamic terminal and a method for arranging and planning the measurement and control station.
Background
The measurement and control station is a device for providing the functions of test control, data acquisition, data recording and the like for the high-dynamic terminal test system, a reasonable and effective measurement and control station layout scheme can improve the communication duration between the measurement and control station and the high-dynamic terminal, obtain larger data flow, provide better data support for the high-dynamic terminal test system, and be more complete in test of the high-dynamic terminal test system, and be helpful for improving the safety of practical implementation. For data acquisition and data recording, the core problem of the arrangement of the measurement and control station is the communication problem, and factors influencing communication comprise two factors of a high-dynamic terminal and the measurement and control station.
From the perspective of a highly dynamic terminal, there are a number of factors that seriously affect its communication performance, mainly including: 1. the high dynamic terminal has extremely high flying height which can reach hundreds of kilometers, and under the height, the terminal antenna is difficult to keep communication with the ground measurement and control station due to limited power; 2. the high dynamic terminal has extremely high flying speed, the highest speed can reach 10-20 Mach, the average speed can reach 4-6 Mach, and larger Doppler frequency shift can be brought to communication under the high speed; 3. the gesture is constantly changing when the high dynamic terminal flies, including pitching, yawing and rolling changes, wherein the biggest change is the change of pitching, and the change of the terminal gesture directly influences the change of the direction pointed by the antenna center, easily leads to the antenna to point and not go to the measurement and control station, thereby makes the communication link break.
From the perspective of the measurement and control station, there are also a plurality of factors that affect the communication performance of the system, mainly including: 1. under the influence of geographical environment, measurement and control stations can not be arranged at any place, such as mountain regions, rivers and different geographical positions, the coverage time of the high-dynamic terminal antenna is also different, so that the communication time is influenced, and the communication link performance of the areas with more shielding objects such as Milin is also influenced; 2. the rotation speed of the antenna of the measurement and control station is low, the flying speed of the terminal is extremely high, and the antenna of the measurement and control station cannot ensure that the terminal always follows a high dynamic terminal; 3. the antenna of the measurement and control station has limited coverage in a three-dimensional space, which is shown by limited coverage opening angle and limited coverage distance, and can only cover a terminal moving at a high speed in a short time.
Under the prior art, in practice, the arrangement of the measurement and control station often sets an alternative station address according to experience of an operator, then a final scheme is selected by field investigation, and the problem of tracking measurement accuracy is more concerned, and influences on a communication link are not considered, so that the arranged measurement and control station cannot guarantee good communication quality. In the field of measurement and control station layout for high-dynamic terminals, the layout problem is more focused on tracking measurement precision, and a geometric scheme of the measurement and control station layout is generated through some calculation, so that the purpose of improving the measurement precision of measurement and control equipment is achieved.
Some researchers also obtain the arrangement scheme of the measurement and control station in advance through a simulation means and then implement the arrangement scheme. In the whole high-dynamic terminal communication system, in order to complete the simulation calculation of a communication link, a measurement and control station and a high-dynamic terminal are required to be modeled, and then a series of simulation calculations are required to be carried out. Regarding the simulation modeling part, a large number of organizations or institutions have made corresponding research work, but the simulation modeling part excessively depends on input, carries out simulation evaluation on a communication system according to input data, can only be used for evaluating the quality of a layout scheme, actually has few considered factors, and mostly does not consider the topography factors and the unified problem of data of each coordinate system, so that the simulation modeling part is difficult to be used for planning the layout scheme, the communication link performance of a terminal cannot be accurately predicted, and the communication efficiency of measurement and control equipment and a high-dynamic terminal cannot be ensured.
Disclosure of Invention
Therefore, the invention aims to overcome the defects of the prior art and provide a method for acquiring the alternative station address of the measurement and control station and a method for planning the arrangement of the measurement and control station.
According to a first aspect of the present invention, there is provided a method for acquiring an alternative site of a measurement and control station, including: s1, acquiring a high-dynamic terminal target track corresponding to the arrangement of a measurement and control station, uniformly segmenting the high-dynamic terminal target track, and generating a preset number of alternative station addresses for each segment; s2, adjusting the antenna pointing direction of the measurement and control station of each alternative station address to be the optimal pointing direction, so that the measurement and control station of the alternative station address can obtain the antenna pointing direction of the maximum communication duration of the high-dynamic terminal; s3, counting the communicable time period of each alternative station address, wherein the communicable time period of each alternative station address is a time period which meets the communication distance between the measurement and control station and the high-dynamic terminal, can be covered by the high-dynamic terminal antenna and can be covered by the high-dynamic terminal; s4, selecting a preset number of alternative station addresses according to the size of the communicable time period and all the alternative station addresses. Preferably, the method further comprises: and S5, when judging that the alternative sites with unreachable terrains exist in the alternative sites selected in the S4, diffusing the alternative sites with unreachable terrains to two sides of the track by taking each alternative site with unreachable terrains as the center to select the final alternative site with reachable terrains.
Preferably, in said step S1, each segment is 1 longitudinal distance.
Preferably, the preset number of each segment candidate site is an integer greater than or equal to 2.
In some embodiments of the invention, the step S2 includes: s21, the azimuth angle of the antenna of the measurement and control station is directed to one flying side of the high dynamic terminal, the changing step length of the pitch angle of the antenna of the measurement and control station is adjusted from large to small, and the following steps S22 and S23 are executed for each adjustment; s22, constructing a first space vector based on the orientation of the antenna of the measurement and control station and the position of the measurement and control station, wherein the first space vector is a space vector of the coordinates pointed by the antenna of the measurement and control station pointed to the coordinates of the position of the alternative station address of the measurement and control station; s23, constructing a second space vector set based on the position of the high-dynamic terminal and the position of the measurement and control station, wherein the second space vector set is a set of second space vectors pointing to the position coordinates of the alternative station address of the measurement and control station from the position coordinates of the high-dynamic terminal at each moment; s24, calculating the time length of the measurement and control station meeting the communication condition with the high dynamic terminal at the alternative station address based on each second space vector in the first space vector and the second space vector set, wherein the time length of the measurement and control station meeting the communication condition with the high dynamic terminal at the alternative station address means that the antenna gain attenuation corresponding to the included angle between the first space vector and the second space vector is smaller than or equal to a preset antenna gain attenuation threshold; s24, fixing the orientation of the antenna of the measurement and control station at the orientation corresponding to the situation that the measurement and control station meets the communication condition of the high-dynamic terminal and the communication duration is maximum.
Preferably, in the step S2, the positions of the candidate station addresses of the measurement and control station and the high dynamic terminal at any moment are converted into the preset unified coordinate system, and then the measurement and control station antenna directions of each candidate station address are adjusted to be the optimal directions.
Preferably, the preset antenna gain attenuation threshold is 3dB.
Preferably, the step S3 includes performing the following steps for each alternative site: s31, respectively calculating a time period conforming to the communication distance between the measurement and control station and the high-dynamic terminal, a time period in which the high-dynamic terminal antenna can cover the measurement and control station and a time period in which the measurement and control station antenna can cover the high-dynamic terminal, wherein the time period conforming to the communication distance between the measurement and control station and the high-dynamic terminal refers to a time period in which the distance between the measurement and control station and the high-dynamic terminal is smaller than the smaller value of the maximum coverage distance of the high-dynamic terminal antenna and the maximum coverage distance of the measurement and control station antenna; the time period that the high-dynamic terminal antenna can cover to the measurement and control station refers to the time period that the included angle between the first space vector and the second space vector is smaller than the half-wave beam angle of the high-dynamic terminal antenna; the time period when the measurement and control station antenna can cover the high dynamic terminal is the time period when the included angle between the first space vector and the second space vector is smaller than the half-wave beam opening angle of the measurement and control station antenna; s32, calculating an intersection of a time period conforming to the communication distance between the measurement and control station and the high-dynamic terminal, a time period when the high-dynamic terminal antenna can cover the measurement and control station and a time period when the measurement and control station antenna can cover the high-dynamic terminal.
In some embodiments of the present invention, the step S5 includes using the block simulated annealing method to diffuse to two sides of the track to select a final candidate site corresponding to each candidate site, centering on each candidate site selected in the step S4, wherein diffusing to one side of the track centering on each candidate site includes the following steps: s51, moving the current alternative station address to one side of the track until the terrain is reachable; s52, calculating a corresponding communicable period when the current alternative station address moves to the new position, moving the current alternative station address to the new position and executing the step S51 when the corresponding communicable period when the current alternative station address moves to the new position is larger than or equal to the corresponding communicable period when the current alternative station address does not move, and directly entering the step S53 when the corresponding communicable period when the current alternative station address moves to the new position is smaller than the corresponding communicable period when the current alternative station address does not move; and S53, calculating the system temperature, wherein the system temperature is the difference value between the communicable period corresponding to the home position of the current alternative station address and the communicable period corresponding to the new position of the current alternative station address, the movement is ended when the system temperature is smaller than the set minimum temperature, and the system temperature is updated according to the preset annealing rate and the step S51 is executed when the system temperature is larger than or equal to the set minimum temperature.
According to a second aspect of the present invention, there is provided a measurement and control station layout planning method, the method comprising: b1, acquiring alternative station addresses of the measurement and control station by adopting the method according to the first aspect of the invention, wherein each alternative station address comprises azimuth angle and pitch angle information of an antenna of the measurement and control station; and B2, carrying out measurement and control station layout planning according to the position of the alternative station address, the azimuth angle and the pitch angle of the antenna of the measurement and control station obtained in the step B1.
Compared with the prior art, the invention has the advantages that: the invention simulates the high dynamic terminal track and the communication link from the global angle, sets the performance constraint and the channel constraint of the high dynamic terminal and the measurement and control equipment antenna, selects the approximate position most suitable for station arrangement, then sets the terrain factors on the basis, adopts an optimization algorithm to calculate the optimal arrangement station and the measurement and control equipment antenna orientation, and has the advantages of high automation degree, accurate arrangement, long communication time of the terminal and the measurement and control equipment, and the like.
Drawings
Embodiments of the invention are further described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a high dynamic terminal in communication with a measurement and control station according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the position and posture of a high dynamic terminal over time according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a measurement and control station layout planning method according to an embodiment of the invention;
fig. 4 is a schematic diagram of a communication-capable time period calculation according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail by means of specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention aims to solve the problem of how to select addresses and set the directional layout of antennas of ground measurement and control stations in the flight process of a high-dynamic terminal. According to the method, communication duration is used as an optimization target, the antenna coverage of the high-dynamic terminal is calculated based on the motion track and the gesture of the high-dynamic terminal, and on the basis, a reasonable layout scheme is planned by combining constraints such as communication conditions of a measurement and control station and topography.
As mentioned in the background art, the factors influencing the communication of the measurement and control station include the factors of the high dynamic terminal and the measurement and control station, and the track and the gesture of the high dynamic terminal are difficult to change and adjust, so that under the condition of many limitations, the time length of the measurement and control station for data acquisition and data recording of the high dynamic terminal can only be improved from the angle of arranging the measurement and control station. The conventional arrangement method of the measurement and control equipment often sets alternative station addresses according to the experience of operators, and then surveys and selects a final scheme in the field. Therefore, the communication time length between the measurement and control station and the high-dynamic terminal is prolonged by pre-screening the proper measurement and control station position and the antenna pointing angle of the measurement and control station through simulation. Further, the invention aims at the problems, from the perspective of improving the communication time length, the screening of the alternative station addresses of the measurement and control stations and the layout of the measurement and control stations are carried out, by constructing a measurement and control station model, a measurement and control station antenna model and a high dynamic terminal model, unifying the models under a WGS84 coordinate system, calculating the beam coverage between the measurement and control stations and the terminals, constructing constraint conditions such as antenna constraint and terrain constraint, completing the layout planning of the measurement and control stations, realizing the simulation of the high dynamic terminal tracks and communication links from the global angle, setting the performance constraint and the channel constraint of the high dynamic terminals and the measurement and control equipment antenna, selecting the approximate position most suitable for the layout, and then setting the terrain factors on the basis, and adopting an optimization algorithm to solve the optimal layout station and the antenna orientation of the measurement and control equipment.
For a better understanding of the present invention, the present invention is described in detail below with reference to the drawings.
As shown in fig. 1, a system of a measurement and control station and a high dynamic terminal is shown, the beam coverage and the distance of the high dynamic terminal are limited, the direction of the high dynamic terminal changes along with the change of the gesture of the terminal, and as shown in fig. 1, the gesture of the high dynamic terminal changes at the time points t1, t2, t3 and t4, and the coverage of an antenna also changes. The actual measurement and control station layout comprises a plurality of measurement and control stations, and each ground measurement and control station is provided with an antenna pointing to the air to provide communication service for the high-dynamic terminal.
The invention analyzes the communication link of the high dynamic terminal and the measurement and control station by taking the maximized communication duration as the performance index, and establishes a terminal and measurement and control station model, comprising the following steps: a high dynamic terminal model, a measurement and control station model and a measurement and control station antenna model.
1) High dynamic terminal model
In order to characterize and calculate the motion model of the high-dynamic terminal, the invention establishes a terminal model shown in the following formula to express the route track of the high-dynamic terminal in a data set way so as to facilitate simulation analysis:
M＝(T,V,P m ,Att,Ant)
wherein, T represents the movement duration of the terminal, V represents the speed of each moment of the terminal in the T time, P represents the position of each moment of the terminal in the T time, att represents the attitude of each moment of the terminal in the T time, ant represents the antenna model adopted by the terminal, and covers the installation position, the antenna direction, the antenna gain and the like of the terminal, as shown in fig. 2 (a), a typical trend of the change of the position of the high-dynamic terminal with time is shown, as shown in fig. 2 (b), a typical trend of the change of the attitude of the high-dynamic terminal with time is shown, and the model represents a corresponding high-dynamic terminal track data set.
2) Measurement and control station model
In order to characterize and calculate the position and antenna coverage of the measurement and control station, a measurement and control station model is established as shown in the following formula:
F＝(P f ,Azi,Ele,Ant)
wherein P represents the position of the measurement and control station, such as longitude, latitude and altitude, azi and Ele represent the central direction of the antenna of the measurement and control station, namely azimuth angle and pitch angle, ant represents the antenna model adopted by the measurement and control station, the antenna gain of the measurement and control station is covered, and the like, and the measurement and control station model corresponds to the data set of the positions corresponding to all the measurement and control stations, the central direction of the antenna of each position and the antenna model.
3) Antenna model
The antenna model adopts a simple model of half-wave beam angle and distance:
Ant＝(θ f ,d f )
and the antenna can work normally in the half-wave beam angle and the distance range on the premise that the antenna gain attenuation is not more than 3dB away from the center of the antenna, and can provide service for high-dynamic terminals in the coverage range. Under the condition of a given antenna model, an antenna gain table can be obtained, and the antenna gain can be queried according to the opening angle, and detailed description is omitted here.
After the basic models of the measurement and control station, the high-dynamic terminal and the antenna are established, the invention solves the problem of layout planning of the measurement and control station under the constraint condition, as shown in fig. 2, and the specific solving process is as follows:
step 1: and responding to the requirement of arranging the measurement and control station, acquiring a high dynamic terminal target track corresponding to the arrangement of the measurement and control station, and generating a certain amount of alternative station addresses according to the high dynamic terminal track. Wherein the terminal track is segmented uniformly, for example, about 1 longitudinal distance per segment, and the same number of sites are generated per segment. For example, a terminal flying from west to east a distance of 10 longitudes may generate 3 alternate sites per longitude below the terminal track, i.e., 30 alternate sites in total. On the basis of constructing a measurement and control station model, a high-dynamic terminal model and a measurement and control station antenna, acquiring the high-dynamic terminal track is equivalent to acquiring a section of high-dynamic terminal data set corresponding to the track, and the data set is laid out according to the mode of the high-dynamic terminal model. The generated alternative station addresses are also equivalent to that each alternative station address generates measurement and control station data containing the station address to form a measurement and control station data set and a measurement and control station antenna data set.
Step 2: and calculating the optimal direction of the antenna of the measurement and control station of each alternative station address, wherein the optimal direction refers to the direction adopted by the antenna of the measurement and control station when the station address is in the station address, so that the antenna of the measurement and control station can cover the high dynamic terminal for a longer time compared with other directions. According to one embodiment of the invention, said step 2 comprises, for each alternative site, performing:
step 21: converting the position data of the measurement and control station and the high dynamic terminal obtained in the step 1 into a unified coordinate system, for example, a WGS84 coordinate system, and using (x) f ，y f ，z f ) Indicating the position of the measuring and controlling station (x) m ，y m ，z m ) Indicating the arbitrary time position of the high dynamic terminal.
Step 22: establishing a carrier coordinate system based on a measurement and control station, and converting the antenna orientation into a (x) under a WGS84 coordinate system according to the antenna orientation (Azi, ele) of the measurement and control station a ，y a ，z a ) Then based on the measurement and control station position (x f ，y f ，z f ) Constructing a first space vector:
step 23: according to the position of the measurement and control station and the position (x) of the high dynamic terminal at any moment m ，y m ，z m ) Constructing a second spatial vector:
step 24: and calculating the duration that the measurement and control station can cover the high dynamic terminal. Specifically, calculateAnd->And the included angle theta is as follows:
obtaining antenna gain value of the direction according to the antenna model (inquiring the antenna gain table corresponding to the antenna model) so as to judge the communicationCapability, calculated θ per second t Gain is obtained by looking up a table, the gain attenuation is smaller than 3dB, which accords with the communication condition, and analysis and statistics are carried out to calculate that the high dynamic terminal accords with the communication condition with the measurement and control station in the motion process (namely, within the range of half power wave beamsAndincluded angle theta of (2) t To be within the half power beam angle range corresponding to the antenna model), the available communication duration is accumulated.
Step 25: the azimuth angle of the antenna of the fixed measurement and control station points to the flying side of the terminal, the pitch angle change step length is adjusted from large to small, the pitch angle is adjusted, the steps 22 to 24 are repeated, and the optimal pointing angle of the antenna of the measurement and control station corresponding to the maximum communication duration of the terminal can be obtained through iterative calculation.
Step 3: and counting the communicable time period of each alternative station address, wherein the communicable time period of each alternative station address is a time period which meets the communication distance between the measurement and control station and the high-dynamic terminal, can be covered by the high-dynamic terminal antenna and can be covered by the high-dynamic terminal. According to one embodiment of the invention, said step 3 comprises performing, for each alternative site:
step 31: calculating the distance d between the high dynamic terminal and the measurement and control station in the flight process t The maximum coverage distance of the terminal antenna is d m The maximum coverage distance of the antenna of the measurement and control station is d f The time period conforming to the communication distance is T d ＝{t|(d t ＜min(d f ，d m ))}
Step 32: high dynamic terminal antenna half-wave beam angle theta m Calculating the beam coverage of the high dynamic terminal in the flight process without considering the distance, wherein the beam coverage of the high dynamic terminal can cover the time period T of the alternative station address m ＝{t|(θ t ＜θ m )}。
Step 33: measurement and control station antenna half-wave beam angle theta f Calculating measurement and control without considering distanceBeam coverage of the station, and time period for the antenna of the measurement and control station to cover the terminal is T f ＝{t|(θ t ＜ θ f )}。
Step 34: summarizing the time periods between the steps 31 and 33, as shown in fig. 4, counting the time periods which simultaneously accord with the communication distance between the measurement and control station and the high dynamic terminal, can be covered by the antenna of the measurement and control station and can be covered by the antenna of the terminal, wherein the time periods are the communication time periods:
T＝T d ∩T m ∩T f
step 4: and sequencing the alternative sites according to the communicable time period from large to small, and selecting the alternative sites with the front sequencing according to the preset number of the alternative sites.
Step 5: taking each alternative station address as a center, considering accessibility and non-accessibility of the terrain, and using a block simulated annealing algorithm to diffuse and select the final alternative station address to two sides of the track respectively, wherein the steps to one side are as follows:
step 51: moving the alternative station address to one side of the track, if the terrain is not reachable, continuing to move to obtain a new position of the current alternative station address;
step 52: using the step 2 and the step 3 to obtain the communicable duration T' of the measurement and control station at the new position and the high dynamic terminal, wherein the communicable duration T of the measurement and control station and the high dynamic terminal corresponding to the situation that the current alternative station address does not move to the new position;
step 53: accepting the move to move the current alternative station address to a new position if T '. Gtoreq.T, repeating step 5 until the end, and entering step 54 if T' < T;
step 54: calculate the system temperature temp=t-T', if the system temperature Temp is less than the set minimum temperature value Temp min Ending the movement of the current alternative station address; otherwise, updating the temperature temp=r of the system, repeating the step 5 until the movement is completed, wherein r is a preset annealing rate, r is more than 0 and less than 1, and the smaller r is, the faster the system is cooled.
Step 6: and summarizing data, sequencing according to the length of the communicable time, counting data such as site positions, site antenna azimuth angles, pitch angles and the like, and providing a final site layout planning scheme.
As can be seen from the above embodiments:
1. the invention establishes a communication efficiency evaluation system. The method takes the communication time length as a performance index, uniformly models the high-dynamic terminal, the antenna, the measurement and control station and the measurement and control station antenna in the three-dimensional space, calculates the coverage of the terminal antenna and the measurement and control station antenna at all times under the WGS84 coordinate system, and calculates and obtains the communicable time period and the accumulated communication time length between the terminal antenna and the measurement and control station antenna according to the result of the link budget.
2. The invention provides a method for calculating the optimal pointing direction of an antenna of a measurement and control station. For the measurement and control station, the situation that the antenna steering cannot rotate along with the high-dynamic terminal exists, and the fixed antenna pointing direction is often selected. The invention provides a method for calculating the optimal antenna pointing by taking a communication efficiency evaluation system as a standard under the condition of designating a station address of a measurement and control station on the basis of high dynamic terminal path planning.
3. The invention designs a set of site selection and layout methods of measurement and control stations. On the basis of high dynamic terminal path planning, setting step length according to flight distance, and generating a plurality of alternative station addresses. And then setting performance constraints and channel constraints of the terminal and the measurement and control equipment antenna, adjusting the orientation of the measurement and control equipment antenna, evaluating the communication efficiency of each alternative station address and the terminal, and selecting a plurality of better station addresses. And finally, increasing terrain constraint, improving site selection precision, expanding the alternative sites to the periphery, calculating by adopting a block simulated annealing algorithm to obtain optimal several sites and corresponding antenna orientations, and generating an analysis report.
In general, the invention provides a fully-automatic measurement and control station layout planning method for a high-dynamic terminal, which takes communication efficiency as an evaluation index and plans the layout of a measurement and control station on the premise of the known high-dynamic terminal path layout. In the planning process, a track model, a gesture model and a beam model of the high-dynamic terminal are established for the high-dynamic terminal, a space channel model is established for a wireless channel, a position model and an antenna model of the measurement and control station terminal are established for the measurement and control station, terrain constraint conditions are set for terrain factors, and a block simulated annealing algorithm is adopted to select a station address, so that long-time communication of the measurement and control station and the terminal is ensured, and the method has a high application value.
It should be noted that, although the steps are described above in a specific order, it is not intended that the steps must be performed in the specific order, and in fact, some of the steps may be performed concurrently or even in a changed order as long as the desired functionality is achieved.
The present invention may be a system, method, and/or computer program product. The computer program product may include a computer readable storage medium having computer readable program instructions embodied thereon for causing a processor to implement aspects of the present invention.
The computer readable storage medium may be a tangible device that retains and stores instructions for use by an instruction execution device. The computer readable storage medium may include, for example, but is not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: portable computer disks, hard disks, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static Random Access Memory (SRAM), portable compact disk read-only memory (CD-ROM), digital Versatile Disks (DVD), memory sticks, floppy disks, mechanical coding devices, punch cards or in-groove structures such as punch cards or grooves having instructions stored thereon, and any suitable combination of the foregoing.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. An alternative site acquisition method for a measurement and control station, which is characterized by comprising the following steps:
s1, acquiring a high-dynamic terminal target track corresponding to the arrangement of a measurement and control station, uniformly segmenting the high-dynamic terminal target track, and generating a preset number of alternative station addresses for each segment;
s2, adjusting the antenna pointing direction of the measurement and control station of each alternative station address to be the optimal pointing direction, so that the measurement and control station of the alternative station address can obtain the antenna pointing direction of the maximum communication duration of the high-dynamic terminal; wherein, the step S2 includes:
s21, directing the azimuth angle of the antenna of the measurement and control station to the flying side of the high-dynamic terminal, adjusting the change step length of the pitch angle of the antenna of the measurement and control station from large to small, and executing the following steps for each adjustment
S22、S23；
S22, constructing a first space vector based on the orientation of the antenna of the measurement and control station and the position of the measurement and control station, wherein the first space vector is a space vector of the coordinates pointed by the antenna of the measurement and control station, which points to the coordinates of the position of the alternative station address of the measurement and control station;
s23, constructing a second space vector set based on the position of the high-dynamic terminal and the position of the measurement and control station, wherein the second space vector set is a set of second space vectors pointing to the position coordinates of the alternative station address of the measurement and control station from the position coordinates of the high-dynamic terminal at each moment;
s24, calculating the time length of the measurement and control station meeting the communication condition with the high dynamic terminal at the alternative station address based on each second space vector in the first space vector and the second space vector set, wherein the time length of the measurement and control station meeting the communication condition with the high dynamic terminal at the alternative station address means that the antenna gain attenuation corresponding to the included angle between the first space vector and the second space vector is smaller than or equal to a preset antenna gain attenuation threshold;
s24, fixing the orientation of the antenna of the measurement and control station at the orientation corresponding to the measurement and control station meeting the communication condition with the high-dynamic terminal and having the maximum communication duration
S3, counting the communicable time period of each alternative station address, wherein the communicable time period of each alternative station address is a time period which meets the communication distance between a measurement and control station and a high-dynamic terminal, can be covered by a high-dynamic terminal antenna and can be covered by the high-dynamic terminal; wherein said step S3 comprises performing the following steps for each alternative site:
s31, respectively calculating a time period conforming to the communication distance between the measurement and control station and the high-dynamic terminal, a time period in which the high-dynamic terminal antenna can cover the measurement and control station and a time period in which the measurement and control station antenna can cover the high-dynamic terminal, wherein the time period conforming to the communication distance between the measurement and control station and the high-dynamic terminal refers to a time period in which the distance between the measurement and control station and the high-dynamic terminal is smaller than the smaller value of the maximum coverage distance of the high-dynamic terminal antenna and the maximum coverage distance of the measurement and control station antenna; the time period that the high-dynamic terminal antenna can cover to the measurement and control station refers to the time period that the included angle between the first space vector and the second space vector is smaller than the half-wave beam opening angle of the high-dynamic terminal antenna; the time period when the measurement and control station antenna can cover the high dynamic terminal is the time period when the included angle between the first space vector and the second space vector is smaller than the half-wave beam opening angle of the measurement and control station antenna;
s32, calculating an intersection of a time period conforming to the communication distance between the measurement and control station and the high-dynamic terminal, a time period when the high-dynamic terminal antenna can cover the measurement and control station, and a time period when the measurement and control station antenna can cover the high-dynamic terminal;
s4, selecting a preset number of alternative station addresses according to the size of the communicable time period and all the alternative station addresses;
s5, when the situation that the topography is inaccessible in the alternative station addresses selected in the step S4 is judged, the alternative station addresses with the inaccessible topography are taken as the centers to spread to the two sides of the track to select the final alternative station addresses with the accessible topography, wherein the step S5 comprises the steps of taking each alternative station address selected in the step S4 as the center, using a block simulated annealing method to spread to the two sides of the track to select the final alternative station address corresponding to each alternative station address, and the step of spreading to one side of the track by taking each alternative station address as the center comprises the following steps:
s51, moving the current alternative station address to one side of the track until the terrain is reachable;
s52, calculating a corresponding communicable period when the current alternative station address moves to the new position, moving the current alternative station address to the new position and executing the step S51 when the communicable period when the current alternative station address moves to the new position is larger than or equal to the communicable period when the current alternative station address does not move, and directly entering the step S53 when the communicable period when the current alternative station address moves to the new position is smaller than the communicable period when the current alternative station address does not move;
and S53, calculating the system temperature, wherein the system temperature is the difference between the communicable time period corresponding to the original position of the current alternative station address and the communicable time period corresponding to the new position of the current alternative station address, the movement is ended when the system temperature is smaller than the set minimum temperature, and the system temperature is updated according to the preset annealing rate and the step S51 is executed when the system temperature is larger than or equal to the set minimum temperature.
2. The method according to claim 1, wherein in said step S1, each segment is 1 longitude distance.
3. The method of claim 1, wherein the predetermined number of each segment candidate site is an integer greater than or equal to 2.
4. The method according to claim 1, wherein in the step S2, the position of the candidate sites of the measurement and control station and the position of the high dynamic terminal at any time are converted into a preset unified coordinate system, and then the measurement and control station antenna orientation of each candidate site is adjusted to be the optimal orientation.
5. The method of claim 1, wherein the predetermined antenna gain attenuation threshold is 3dB.
6. The measurement and control station layout planning method is characterized by comprising the following steps of:
b1, acquiring alternative station addresses of the measurement and control station by adopting the method as claimed in any one of claims 1-5, wherein each alternative station address comprises azimuth angle and pitch angle information of an antenna of the measurement and control station;
and B2, carrying out measurement and control station layout planning according to the position of the alternative station address, the azimuth angle and the pitch angle of the antenna of the measurement and control station obtained in the step B1.
7. A computer readable storage medium, having stored thereon a computer program executable by a processor to perform the steps of the method of any of claims 1-5 or 6.
8. An electronic device, comprising:
one or more processors;
storage means for storing one or more programs that when executed by the one or more processors cause the electronic device to perform the steps of the method of any of claims 1-5 or 6.
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