CN116528205A - Signal coverage analysis method and device, electronic equipment and storage medium - Google Patents
Signal coverage analysis method and device, electronic equipment and storage medium Download PDFInfo
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- H—ELECTRICITY
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Abstract
The invention provides a signal coverage analysis method, a device, electronic equipment and a storage medium, wherein the method comprises the following steps: constructing a first link corresponding to the user equipment and a low-altitude platform, a second link corresponding to the low-altitude platform and a high-altitude platform, and a third link corresponding to the high-altitude platform and a ground base station; constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link; and determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model. The method is realized by utilizing a signal coverage model corresponding to the high-low altitude platform considering backhaul constraint (namely the second link and the third link), and provides guidance for the air base station service user equipment of the low-altitude platform on the design of an air communication backhaul, so that effective communication between the user equipment and a ground base station is ensured in time.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a signal coverage analysis method, a signal coverage analysis device, an electronic device, and a storage medium.
Background
After a disaster, the electronic device needs to rapidly deploy the wireless network in the post-disaster area (i.e., the failure area) to provide an emergency response. Because the low-altitude platform (Low Altitude Platform, LAP) has the advantages of easy deployment, low deployment cost and the like, the electronic equipment often adopts an air base station carried by the low-altitude platform to provide emergency communication service for ground user equipment (Ground User Equipment, GUE) (simply called user equipment) in a fault area.
However, when the range of the fault area is too large, the ground infrastructure corresponding to the low-altitude platform may be damaged, so that the low-altitude platform is easy to fail to provide emergency communication service for the user equipment in the fault area in time.
In summary, how to provide effective emergency communication services for user equipment in a fault area becomes a problem to be solved.
Disclosure of Invention
The invention provides a signal coverage analysis method, a device, electronic equipment and a storage medium, which are used for solving the defect that in the prior art, when the range of a fault area is too large, the ground backhaul infrastructure corresponding to a low-altitude platform is possibly damaged, so that effective communication cannot be timely performed between user equipment and the low-altitude platform, realizing the use of a signal coverage model corresponding to a high-altitude platform considering backhaul constraint (namely a second link and a third link), providing guidance for the design of an air communication backhaul of the low-altitude platform air base station service user equipment, further ensuring effective communication in time between the user equipment and the ground base station, and providing effective emergency communication service for the user equipment.
The invention provides a signal coverage analysis method, which comprises the following steps:
constructing a first link corresponding to the user equipment and a low-altitude platform, a second link corresponding to the low-altitude platform and a high-altitude platform, and a third link corresponding to the high-altitude platform and a ground base station;
constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link;
and determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model.
According to the signal coverage analysis method provided by the invention, the number of the low-altitude platforms is a plurality of, the number of the ground base stations is a plurality of, a first link corresponding to the low-altitude platform, a second link corresponding to the high-altitude platform and a third link corresponding to the ground base stations are constructed, and the signal coverage analysis method comprises the following steps: for any one of a plurality of low-altitude platforms, acquiring a first path loss index and a first fading gain parameter between the user equipment and the low-altitude platform; constructing a first link corresponding to the low-altitude platform by the user equipment according to the first path loss index and the first fading gain parameter; acquiring a second path loss index and a second fading gain parameter between the low-altitude platform and the high-altitude platform; constructing a second link corresponding to the low-altitude platform and the high-altitude platform according to the second path loss index and the second fading gain parameter; acquiring a third path loss index and a third fading gain parameter between the high-altitude platform and the ground base station aiming at any one of the ground base stations; and constructing a third link corresponding to the high-altitude platform and the ground base station according to the third path loss index and the third fading gain parameter.
According to the signal coverage analysis method provided by the invention, a signal coverage model is constructed according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link, and the signal coverage analysis method comprises the following steps: acquiring association probability and successful access probability between the user equipment and the low-altitude platform, and determining a first probability corresponding to the first link according to the association probability and the successful access probability; acquiring the height difference between the low-altitude platform and the high-altitude platform; determining a second probability corresponding to the second link according to the second path loss index, the second fading gain parameter and the altitude difference; determining a ground base station closest to the high-altitude platform as a target ground base station, and acquiring a probability density function corresponding to the horizontal distance between the target ground base station and the high-altitude platform; determining a third probability corresponding to the third link according to the third path loss index, the third fading gain parameter and the probability density function; and constructing the signal coverage model according to the first probability, the second probability and the third probability.
According to the signal coverage analysis method provided by the invention, the association probability and the successful access probability between the user equipment and the low-altitude platform are obtained, and the first probability corresponding to the first link is determined according to the association probability and the successful access probability, which comprises the following steps: under the condition that the first link is a line-of-sight wireless transmission link, acquiring a first association probability and a first successful access probability corresponding to the line-of-sight wireless transmission link; acquiring a second association probability and a second successful access probability corresponding to a non-line-of-sight wireless transmission link under the condition that the first link is the non-line-of-sight wireless transmission link; and determining a first probability corresponding to the first link according to the first association probability, the first successful access probability, the second association probability and the second successful access probability.
According to the signal coverage analysis method provided by the invention, the signal coverage model is constructed according to the first probability, the second probability and the third probability, and the signal coverage analysis method comprises the following steps: obtaining a total coverage probability according to the product of the first probability, the second probability and the third probability; and constructing the signal coverage model according to the total coverage probability.
According to the signal coverage analysis method provided by the invention, the signal coverage analysis result between the user equipment and the low-altitude platform is determined according to the signal coverage model, and the signal coverage analysis method comprises the following steps: under the condition that the total coverage probability corresponding to the signal coverage model is larger than a preset probability threshold, determining that the signal coverage analysis result between the user equipment and the low-altitude platform is successful in coverage; and under the condition that the total coverage probability is smaller than or equal to the preset probability threshold value, determining that a signal coverage analysis result between the user equipment and the low-altitude platform is coverage failure.
The invention also provides a signal coverage analysis device, comprising:
the construction module is used for constructing a first link corresponding to the low-altitude platform, a second link corresponding to the low-altitude platform and the high-altitude platform and a third link corresponding to the high-altitude platform and the ground base station; constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link;
And the processing module is used for determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the signal coverage analysis method as described above when executing the program.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a signal coverage analysis method as described in any of the above.
The invention also provides a computer program product comprising a computer program which, when executed by a processor, implements a signal coverage analysis method as described in any one of the above.
The signal coverage analysis method, the signal coverage analysis device, the electronic equipment and the storage medium provided by the invention are characterized in that a first link corresponding to a low-altitude platform of user equipment, a second link corresponding to the low-altitude platform and a high-altitude platform and a third link corresponding to a ground base station of the high-altitude platform are constructed; constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link; and determining a signal coverage analysis result between the user equipment and the low-altitude platform network according to the signal coverage model. The method is used for solving the defect that in the prior art, when the range of a fault area is too large, the ground backhaul infrastructure corresponding to the low-altitude platform is possibly damaged, so that effective communication cannot be timely performed between the user equipment and the low-altitude platform, and realizing the guidance of the low-altitude platform air base station service user equipment on the air communication backhaul design by utilizing the signal coverage model corresponding to the high-altitude platform considering backhaul constraint (namely the second link and the third link), thereby ensuring the effective communication in time between the user equipment and the ground base station, and also providing effective emergency communication service for the user equipment.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a signal coverage analysis method provided by the present invention;
FIG. 2 is a schematic flow chart of a signal coverage analysis method provided by the invention;
FIG. 3 is a schematic diagram of a signal coverage analysis method according to the present invention;
FIG. 4 is a schematic diagram of a signal coverage analysis device according to the present invention;
fig. 5 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic view of a signal coverage analysis method according to the present invention. In fig. 1, the number of user equipments is a plurality, the number of high-altitude platforms (High Altitude Platform, HAP) is one, the number of low-altitude platforms is a plurality, and the number of ground base stations (Ground Base Station, GBS) is a plurality. The user equipment, the high-altitude platform, the low-altitude platform and the ground base station can form an air communication system in which the high-altitude platform and the low-altitude platform coexist.
In the air communication system, a first link can be constructed between each user equipment and each low-altitude platform, a second link can be constructed between each low-altitude platform and each high-altitude platform, a third link can be constructed between each low-altitude platform and each ground base station, and then the three links can form a signal coverage model so as to realize that each user equipment can communicate with the ground base station through the low-altitude platform and the high-altitude platform, namely the whole air communication system can realize wireless communication between each user equipment and the ground base station.
Wherein the plurality of ground base stations are based on the density lambda g Obeying the homogeneous poisson process (Poisson Point Process, PPP) Φ g And are independently distributed. For a ground base station, the ground base station may correspond to a radius r d Circular post-disaster area D of (2) d (i.e., failure zone), the circular post-disaster zone D d The ground base stations within are not available for a long period of time due to disaster. Wherein, the circular post-disaster area D is assumed d The failure zone refers to the location where the disaster occurs, and the plurality of user equipments cannot communicate with the ground base station through the low-altitude platform in the failure zone.
A plurality of low-altitude platforms are positioned at a fixed height h l And obey the density lambda l Is a uniform Poisson Point Process (PPP) phi g And the emergency communication service can be provided for a plurality of user equipment in the fault area by independent distribution. Wherein all low-altitude platforms have the same transmitting power P tl . Frequency division multiplexing is used between cells, and frequency division multiple access is used within a cell.
A high-altitude platform is arranged according to a fixed height h h Deployed in circular post-disaster area D d Providing backhaul connection for multiple low-altitude platforms, h h ＞h l . The low-altitude platform can utilize the millimeter wave frequency band to transmit signals of the user equipment back to the ground base station through the high-altitude platform.
Multiple user equipments obey the uniform Poisson Point Procedure (PPP) Φ g Independently distributed, optionally, the user equipment may include: computer, mobile terminal, wearable device, etc.
In addition, the aerial platform has the following main advantages compared with satellites: the high-altitude platform can be arranged at a fixed height h h The aerial of the beam is kept quasi-static, so that the difficulty of beam alignment is greatly reduced; the high-altitude platform is low in deployment complexity and is more suitable for emergency response; the high-altitude platform is closer to the ground, and less path loss and lower delay are brought; the device has long flight endurance and wide coverage, and can utilize a millimeter wave return link to assist the return stroke of a low-altitude platform.
It should be noted that, the signal coverage analysis method according to the embodiment of the present invention may be used for a typical terrestrial user equipment GUE-u located at the origin o Where the analysis is performed.
It should be noted that, the execution body according to the embodiment of the present invention may be signal coverage analysis or may be an electronic device, where the electronic device is a control device independent of the air communication system.
The following further describes embodiments of the present invention by taking an electronic device as an example.
As shown in fig. 2, a flow chart of the signal coverage analysis method provided by the present invention may include:
201. constructing a first link corresponding to the user equipment and the low-altitude platform, a second link corresponding to the low-altitude platform and the high-altitude platform, and a third link corresponding to the high-altitude platform and the ground base station.
Wherein the first link may be referred to as a low-altitude platform-user equipment access link.
The second link and the third link may be collectively referred to as a backhaul link, wherein the second link may be referred to as a high-altitude platform-low-altitude platform millimeter wave backhaul link; this third link may be referred to as a ground base station-high altitude platform millimeter wave backhaul link.
After determining the user equipment, the low-altitude platform, the high-altitude platform and the ground base station, the electronic equipment can perform channel modeling on each section of communication link to construct a first link corresponding to the low-altitude platform, a second link corresponding to the low-altitude platform and the high-altitude platform and a third link corresponding to the high-altitude platform and the ground base station, so that effective communication of signals on each link is ensured.
It should be noted that, since the number of the user equipments is plural, the number of the low-altitude platforms is plural, and therefore the number of the first links is plural; since the number of low-altitude platforms is a plurality of and the number of high-altitude platforms is one, the number of the second links is the same as the number of the low-altitude platforms; since the number of ground base stations is a plurality of, the number of high-altitude platforms is one, the number of third links is the same as the number of ground base stations.
It should be noted that, the timing of the electronic device constructing the first link, the electronic device constructing the second link, and the electronic device constructing the third link is not limited.
In some embodiments, the electronic device constructing a first link corresponding to the low-altitude platform, a second link corresponding to the low-altitude platform, and a third link corresponding to the high-altitude platform and the ground base station of the user device may include: the electronic equipment acquires a first path loss index (Path Loss Exponent, PLE) and a first fading gain parameter between the user equipment and the low-altitude platform for any one of the plurality of low-altitude platforms; constructing a first link corresponding to the user equipment and the low-altitude platform according to the first path loss index and the first fading gain parameter; the electronic equipment acquires a second path loss index and a second fading gain parameter between the low-altitude platform and the high-altitude platform; constructing a second link corresponding to the low-altitude platform and the high-altitude platform according to the second path loss index and the second fading gain parameter; aiming at any ground base station in a plurality of ground base stations, the electronic equipment acquires a third path loss index and a third fading gain parameter between the high-altitude platform and the ground base station; and constructing a third link corresponding to the high-altitude platform and the ground base station according to the third path loss index and the third fading gain parameter.
Where the pathloss index refers to the ratio between the received power corresponding to a signal in the channel and the transmitted power corresponding to the signal.
Fading gain parameters refer to parameters corresponding to the modulation of signal changes caused by multipath delay approaching or overtime transmission signal periods.
Alternatively, the first path loss index, the second path loss index, and the third path loss index may be the same or different; the first fading gain parameter, the second fading gain parameter, and the third fading gain parameter may be the same or different, and are not particularly limited herein.
The electronic device can accurately construct corresponding links according to path loss indexes and fading gain parameters corresponding to different channels, namely, each link has proper large-scale fading (such as path loss indexes) and proper small-scale fading (such as fading gain parameters), so that the accuracy of each link is higher, and data support can be provided for the follow-up accurate construction of signal coverage modes.
Optionally, the electronic device constructs a first link corresponding to the low-altitude platform by using the user device according to the first path loss index and the first fading gain parameter, and the method may include: and the electronic equipment determines a first link corresponding to the low-altitude platform by the user equipment according to the first link formula.
The first link formula is:
indicated in a typical ground user equipment GUE-u o Power received from the ith low altitude platform; p (P) tl Representing the transmitting power corresponding to the ith low-altitude platform; r is (r) li Representing a typical terrestrial user equipment GUE-u o A direct distance from the i-th low-altitude platform; alpha l,ζ Representing a typical terrestrial user equipment GUE-u o Channel pair with the ith low-altitude platformA corresponding first path loss index; />Representing an ith low-altitude platform and typical ground user equipment GUE-u o A first fading gain parameter corresponding to the channel between the two, wherein the first fading gain parameter can be Nakagami-m fading gain, and the first fading gain parameter follows a shape parameter/fading gain parameter of m l,ζ Gamma distribution of (c); ζ represents link propagation conditions; ζ=l represents Line of Sight (LOS) link propagation conditions, and ζ=n represents Non-Line of Sight (NLOS) link propagation conditions.
That is, the first link may be a line-of-sight wireless transmission link or a non-line-of-sight wireless transmission link, which is not particularly limited herein.
Wherein, the propagation condition of the line-of-sight wireless transmission link is the probability corresponding to the line-of-sight wireless transmission link, and the line-of-sight wireless transmission link is available The representation, a, represents a first preset environmental parameter, b represents a second preset environmental parameter, and x represents a typical ground user equipment GUE-u o Horizontal distance from the i-th low-altitude platform.
The propagation condition of the non-line-of-sight wireless transmission is the probability corresponding to the non-line-of-sight wireless transmission link, and the available P N (x)＝1-P L (x) And (3) representing.
Alternatively, in the case where the first link is a line-of-sight wireless transmission link, α l,ζ ＝α l,L ，m l,ζ ＝m l,L . In the case where the first link is a non-line-of-sight wireless transmission link, α l,ζ ＝α l,N ，m l,ζ ＝m l,N . Wherein alpha is l,L ≠α l,N ，m l,L ≠m l,N 。
The electronic equipment can accurately determine the first link corresponding to the low-altitude platform by the user equipment according to the first link formula. The first link has a suitable large scale fading (e.g., a first path loss index) and a suitable small scale fading (e.g., a first fading gain parameter) to make the accuracy of the first link higher.
Optionally, the electronic device constructing a second link corresponding to the low-altitude platform and the high-altitude platform according to the second path loss index and the second fading gain parameter may include: and the electronic equipment determines a second link corresponding to the low-altitude platform and the high-altitude platform according to a second link formula.
Wherein, the second link formula is:
representing power received from the high-altitude platform at the ith low-altitude platform; p (P) th Representing the corresponding transmitting power of the high-altitude platform; c (C) h Representing a path loss intercept corresponding to a channel between an ith low-altitude platform and a high-altitude platform; g th Indicating the directional gain of the transmitter in the high-altitude platform; g rl Indicating the directional gain of the receiver in the ith low altitude platform; />Representing a direct distance between the i-th low-altitude platform and the high-altitude platform; alpha h Representing a second path loss index corresponding to a channel between the i-th low-altitude platform and the high-altitude platform; />And representing a second fading gain parameter corresponding to the channel between the ith low-altitude platform and the high-altitude platform, wherein the second fading gain parameter is Nakagami-m fading gain.
The electronic equipment can accurately determine the second link corresponding to the low-altitude platform and the high-altitude platform according to the second link formula. The second link has a suitable large scale fading (e.g., a second path loss index) and a suitable small scale fading (e.g., a second fading gain parameter) to provide a higher accuracy of the second link.
Optionally, constructing a third link corresponding to the high-altitude platform and the ground base station according to the third path loss index and the third fading gain parameter may include: and the electronic equipment determines a third link corresponding to the high-altitude platform and the ground base station according to a third link formula.
Wherein, the third link formula is:
representing power received at the high altitude platform from a jth ground base station; p (P) tg Representing the transmitting power corresponding to the j-th ground base station; c (C) g,L Representing a path loss intercept corresponding to a channel between the high-altitude platform and the jth ground base station; g tg Indicating the directional gain of the transmitter in the jth ground base station; g rh Indicating the directional gain of the receiver in the high-altitude platform;representing the distance between the high-altitude platform and the jth ground base station; alpha g,L Representing a third path loss index corresponding to a channel between the high-altitude platform and the jth ground base station; />And a third fading gain parameter corresponding to the channel between the high-altitude platform and the jth ground base station is shown, wherein the third fading gain parameter is Nakagami-m fading gain.
And the electronic equipment can accurately determine the third link corresponding to the high-altitude platform and the ground base station according to the third link formula. The third link has a suitable large scale fading (e.g., third path loss index) and a suitable small scale fading (e.g., third fading gain parameter) to make the accuracy of the third link higher.
It should be noted that the air communication system depends on the wireless backhaul link, that is, on the second link and the third link. That is, the link performance of the second link and the third link may affect the communication coverage performance to a large extent.
202. And constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link.
Wherein the first probability, which may be referred to as a successful access probability between the user equipment and the associated low-level platform, is that the signal-to-interference ratio (Signal to Interference Ratio, SIR) exceeds the access probability threshold τ when accessing the first link, assuming that each user equipment is connected to the low-level platform providing the maximum average received signal strength a Is a probability of (2).
Optionally, the user equipment u and the associated low-altitude platform I o Signal-to-interference ratio between availableAnd (3) representing. r is (r) l Representing user equipment u and low-altitude platform I o A direct distance between; alpha u,ζ Representing user equipment u and low-altitude platform I o Path loss index corresponding to the channel between the two; />Representing user equipment u and low-altitude platform I o Nakagami-m fading gains corresponding to the channels between them;
representing the cumulative interference received at a typical user device u from both line-of-sight and non-line-of-sight low-altitude platforms.
Wherein the second probability and the third probability are backhaul probabilities, and the backhaul generalizes to the probability of successful backhaul transmission, that is, the signal-to-noise ratio (Signal to Noise Ratio, SNR) in the second link and the third link exceeds the backhaul probability threshold τ b Can be used for joint probability of (a) And (3) representing.
Representing a high-altitude platform and a low-altitude platform I o The signal-to-noise ratio between the two, namely the signal-to-noise ratio corresponding to the second link; sigma (sigma) 2 Representing the noise power.
Representing ground base station g o And the signal-to-noise ratio between the high-altitude platforms, namely the signal-to-noise ratio corresponding to the third link.
The above-mentioned The rationality of (1) stems from the independence of the two events because the two links (i.e., the second link and the third link) experience relatively independent channel environments. For simplicity, P is used hereinafter b,1 Representation->Using P b,2 Representing P [ SNR ] h,g ≥τ b ]。
In the process of constructing the signal coverage model, the electronic equipment can firstly determine the first probability, the second probability and the third probability under the given successful return stroke condition, so as to accurately construct the signal coverage model.
It should be noted that, the timing of determining the first probability by the electronic device, determining the second probability by the electronic device, and determining the third probability by the electronic device is not limited.
In some embodiments, the electronic device constructing the signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link, and the third probability corresponding to the third link may include: the electronic equipment acquires the association probability and the successful access probability between the user equipment and the low-altitude platform, and determines a first probability corresponding to the first link according to the association probability and the successful access probability; the electronic equipment acquires the height difference between the low-altitude platform and the high-altitude platform; determining a second probability corresponding to the second link according to the second path loss index, the second fading gain parameter and the height difference; the electronic equipment determines a ground base station closest to the high-altitude platform as a target ground base station, and acquires a probability density function corresponding to the horizontal distance between the target ground base station and the high-altitude platform; the electronic equipment determines a third probability corresponding to a third link according to a third path loss index, a third fading gain parameter and a probability density function; the electronic device constructs a signal coverage model according to the first probability, the second probability and the third probability.
Wherein the height difference refers to the height h of the low-altitude platform l Height h with the high altitude platform h The difference between them can be expressed as Δh.
The electronic equipment can determine the probability corresponding to each link according to different data corresponding to each link, and further accurately construct the signal coverage model.
In some embodiments, the electronic device obtaining the association probability and the successful access probability between the user device and the low-altitude platform, and determining the first probability corresponding to the first link according to the association probability and the successful access probability may include: the electronic equipment acquires a first association probability and a first successful access probability corresponding to the line-of-sight wireless transmission link under the condition that the first link is the line-of-sight wireless transmission link; the electronic equipment acquires a second association probability and a second successful access probability corresponding to the non-line-of-sight wireless transmission link under the condition that the first link is the non-line-of-sight wireless transmission link; the electronic equipment determines a first probability corresponding to the first link according to the first association probability, the first successful access probability, the second association probability and the second successful access probability.
The first association probability is not equal to the second association probability, and the first successful access probability is not equal to the second successful access probability.
Because the first link between the user equipment and the low-altitude platform can be a line-of-sight wireless transmission link or a non-line-of-sight wireless transmission link, and the corresponding association probabilities are different, and the successful access probabilities are also different, the electronic equipment needs to judge whether the first link is the line-of-sight wireless transmission link or the non-line-of-sight wireless transmission link; then, under the condition that the first link is determined to be the line-of-sight wireless transmission link, the electronic equipment acquires a first association probability and a first successful access probability; acquiring a second association probability and a second successful access probability under the condition that the first link is the non-line-of-sight wireless transmission link; and then, the electronic equipment accurately determines the first probability corresponding to the first link according to the first association probability, the first successful access probability, the second association probability and the second successful access probability.
It should be noted that, the timing when the electronic device obtains the first association probability and the first successful access probability and the electronic device obtains the second association probability and the second successful access probability is not limited.
Optionally, the determining, by the electronic device, the first probability corresponding to the first link according to the association probability and the successful access probability may include: and the electronic equipment determines a first probability corresponding to the first link according to the first probability formula.
The first probability formula is as follows: p (P) a ＝A L P a,L +A N P a,N ；
P a Representing a first probability; a is that L Representing a typical terrestrial user equipment GUE-u o A first association probability associated with the line-of-sight low-altitude platform; p (P) a,L Representing a typical terrestrial user equipment GUE-u o A first successful access probability under conditions associated with the line-of-sight low altitude platform; a is that N Representing a typical terrestrial user equipment GUE-u o A second association probability associated with a non-line-of-sight low-altitude platform; p (P) a,N Representing a typical terrestrial user equipment GUE-u o Second successful access probability under conditions associated with non-line-of-sight low-altitude platforms.
The first association probability is as follows:
the second association probability is: a is that N ＝1-A L 。
λ l Representing the distribution density of the low-altitude platform;representing a typical terrestrial user equipment GUE-u o At a horizontal distance x l A horizontal distance lower limit of the nearest line-of-sight interference low-altitude platform under the condition that the non-line-of-sight low-altitude platform is associated; x is x l Representing a typical terrestrial user equipment GUE-u o A horizontal distance from an associated low-altitude platform; t represents a function integral variable without actual physical meaning; p (P) L (t) represents a probability corresponding to the line-of-sight wireless transmission link;representing a typical terrestrial user equipment GUE-u o Horizontal distance x to associated low-altitude platform l Probability density functions of (2); p (P) π (x l ) Representing the probability corresponding to the line-of-sight wireless transmission link/the non-line-of-sight wireless transmission link; / > Representing a typical terrestrial user equipment GUE-u o Probability of successful access under conditions associated with line-of-sight/non-line-of-sight LAP; />
Representing the substitution of the Laplace transformation variable without actual physical meaning; k represents a summation variable without actual physical meaning; />Representation of GUE-u when a typical surface user equipment o The laplace transform of the interfering signal when associated with the line-of-sight wireless transmission link/non-line-of-sight wireless transmission link, in particular, in the case of the line-of-sight wireless transmission link,
m l,L the Nakagami-m small-scale fading gain parameters corresponding to the line-of-sight wireless transmission link are represented; m is m l,N The Nakagami-m small-scale fading gain parameters corresponding to the non-line-of-sight wireless transmission link are represented; in the case of a non-line-of-sight wireless transmission link, < - > a->
Representing a typical terrestrial user equipment GUE-u o At a horizontal distance x l The horizontal distance lower limit of the nearest non-line-of-sight interfering low-altitude platform in the case of a line-of-sight low-altitude platform association.
The electronic device can accurately determine the first probability corresponding to the first link according to the first probability formula.
Optionally, the determining, by the electronic device, the second probability corresponding to the second link according to the second path loss index, the second fading gain parameter, and the altitude difference may include: and the electronic equipment determines a second probability corresponding to the second link according to a second probability formula.
Wherein the second probability formula:
P b,1 representing a second probability; m is m h Representing a Nakagami-m small-scale fading gain parameter corresponding to the second link; Δh represents the height difference between HAP and LAP.
The electronic device can accurately determine the second probability corresponding to the second link according to the second probability formula.
Optionally, the determining, by the electronic device, a third probability corresponding to the third link according to the third path loss index, the third fading gain parameter, and the probability density function may include: and the electronic equipment determines a third probability corresponding to the third link according to a third probability formula.
Wherein the third probability formula:
P b,2 representing a third probability; m is m g Representing a Nakagami-m small-scale fading gain parameter corresponding to the third link; x is x g Representing the horizontal distance between the target ground base station and the high-altitude platform;
representing horizontal distance x g The corresponding Probability density function may be derived from the zero Probability (Null Probability) in the homogeneous Poisson Point Process (PPP).
The electronic device can accurately determine the third probability corresponding to the third link according to the third probability formula.
In some embodiments, the electronic device constructing the signal coverage model according to the first probability, the second probability, and the third probability may include: the electronic equipment obtains the total coverage probability according to the product of the first probability, the second probability and the third probability; the electronic device builds a signal coverage model according to the total coverage probability.
Where the total coverage probability refers to the joint probability of successful access and successful backhaul.
The electronic equipment combines the first probability, the second probability and the third probability, so that the total coverage probability can be accurately obtained, and further, the signal coverage model can be accurately constructed.
Optionally, the obtaining, by the electronic device, the total coverage probability according to a product of the first probability, the second probability, and the third probability may include: and the electronic equipment determines the total coverage probability according to the total coverage probability formula.
Wherein, the total coverage probability formula is: p (P) cov ＝P a ×P b,1 ×P b,2 ；
P cov Indicating the total coverage probability.
The electronic device can accurately determine the total coverage probability according to the total coverage probability formula.
203. And determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model.
After the electronic equipment acquires the signal coverage model, the signal coverage analysis result between the user equipment and the low-altitude platform can be determined according to the signal coverage model, and the influence of the backhaul link performance is considered by the signal coverage model to be more in line with the actual network condition, so that the finally obtained signal coverage analysis result is more accurate.
Optionally, the determining, by the electronic device, a signal coverage analysis result between the user device and the low-altitude platform according to the signal coverage model may include: and the electronic equipment determines a signal coverage analysis result between the user equipment and the air base station corresponding to the low-altitude platform according to the signal coverage model.
After the electronic equipment acquires the signal coverage model, the signal coverage analysis result between the user equipment and the aerial base station corresponding to the low-altitude platform can be accurately determined according to the signal coverage model, so that the low-altitude platform can transmit the signal of the user equipment back to the ground base station through the high-altitude platform, and the timely and effective communication between the user equipment and the ground base station is ensured.
In some embodiments, the determining, by the electronic device, a signal coverage analysis result between the user device and the low-altitude platform according to the signal coverage model may include: under the condition that the total coverage probability corresponding to the signal coverage model is larger than a preset probability threshold, the electronic equipment determines that the signal coverage analysis result between the user equipment and the low-altitude platform is successful in coverage; and under the condition that the total coverage probability is smaller than or equal to a preset probability threshold value, the electronic equipment determines that the signal coverage analysis result between the user equipment and the low-altitude platform is coverage failure.
The preset probability threshold may be set before the electronic device leaves the factory, or may be user-defined, which is not specifically limited herein.
After the electronic equipment acquires the total coverage probability corresponding to the signal coverage model, the total coverage probability can be compared with the preset probability threshold, and the situation that the total coverage probability is larger than the preset probability threshold indicates that the total coverage probability is larger, so that the signal coverage analysis result between the user equipment and the low-altitude platform can be accurately determined to be successful coverage; and under the condition that the total coverage probability is smaller than or equal to the preset probability threshold, the total coverage probability is smaller, so that the signal coverage analysis result between the user equipment and the low-altitude platform can be accurately determined to be coverage failure.
In the embodiment of the invention, a first link corresponding to the user equipment and the low-altitude platform, a second link corresponding to the low-altitude platform and the high-altitude platform and a third link corresponding to the high-altitude platform and the ground base station are constructed; constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link; and determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model. The method is used for solving the defect that in the prior art, when the range of a fault area is too large, the ground infrastructure corresponding to the low-altitude platform is possibly damaged, so that effective communication cannot be performed between the user equipment and the low-altitude platform in time, and realizing the guidance on the design of an air communication backhaul of the low-altitude platform air base station service user equipment by utilizing a signal coverage model corresponding to the high-altitude platform considering backhaul constraint (namely a second link and a third link), thereby ensuring effective communication between the user equipment and the ground base station in time, and providing effective emergency communication service for the user equipment.
It should be noted that the electronic device may perform parameter simulation for different signal coverage modes. As shown in table 1, the simulation parameters are taken for the signal coverage model according to the embodiment of the present invention.
Table 1:
fig. 3 is a schematic diagram of a signal coverage analysis method according to the present invention. In fig. 3, an Ideal Backhaul (IB) represents an Ideal coverage assessment model that does not consider Backhaul probabilities (i.e., second probability and third probability); the high altitude platform auxiliary backhaul (HAP-assisted Backhaul, HAB) represents a signal coverage model according to an embodiment of the present invention; the low-altitude platform direct backhaul (LAP Direct Backhaul, LDB) indicates that the low-altitude platform directly transmits signals back to the coverage assessment model of the ground base station, i.e. the LDB does not involve the high-altitude platform. As can be seen from fig. 3, IB has a large performance difference with HAB and LDB, which means that it is important to consider the performance of the backhaul links (i.e. the second link and the third link) in the air communication network.
In the fault region D d When the range of LDB is smaller, the coverage performance of LDB is better, however, with the failure area D d Radius r of (2) d As the available ground base stations are far away, the backhaul performance of the direct backhaul of the low-altitude platform is greatly affected, and the coverage performance of the LDB is severely reduced. Compared with the performance decrease trend of IB and LDB, the performance decrease trend of HAB is slower, which indicates that the backhaul mode based on the high-altitude platform assisted backhaul can better cope with a larger range of fault region D d Emergency communication. That is, the HAB ensures timely and efficient communication between the user equipment and the ground base station.
The signal coverage analysis method device provided by the invention is described below, and the signal coverage analysis method device described below and the signal coverage analysis method described above can be referred to correspondingly.
As shown in fig. 4, a schematic structural diagram of a signal coverage analysis device provided by the present invention may include:
a construction module 401, configured to construct a first link corresponding to a low-altitude platform, a second link corresponding to the low-altitude platform and a high-altitude platform, and a third link corresponding to the high-altitude platform and a ground base station; constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link;
and the processing module 402 is configured to determine a signal coverage analysis result between the ue and the low-altitude platform according to the signal coverage model.
Optionally, the number of the low-altitude platforms is multiple, the number of the ground base stations is multiple, and the construction module 401 includes an acquisition unit 4011 and a construction unit 4012;
an obtaining unit 4011, configured to obtain, for any one of the plurality of low-altitude platforms, a first path loss index and a first fading gain parameter between the user equipment and the low-altitude platform;
A construction unit 4012, configured to construct a first link corresponding to the low-altitude platform by the ue according to the first path loss index and the first fading gain parameter;
an acquisition unit 4011 for acquiring a second path loss index and a second fading gain parameter between the low-altitude platform and the high-altitude platform;
a construction unit 4012, configured to construct a second link corresponding to the low-altitude platform and the high-altitude platform according to the second path loss index and the second fading gain parameter;
an obtaining unit 4011, configured to obtain, for any one of the ground base stations, a third path loss index and a third fading gain parameter between the high-altitude platform and the ground base station;
and a construction unit 4012, configured to construct a third link corresponding to the ground base station and the high-altitude platform according to the third path loss index and the third fading gain parameter.
Optionally, an acquiring unit 4011 is configured to acquire an association probability and a successful access probability between the ue and the low-altitude platform;
a construction unit 4012, configured to determine a first probability corresponding to the first link according to the association probability and the successful access probability;
an acquisition unit 4011 for acquiring a height difference between the low-altitude platform and the high-altitude platform;
A construction unit 4012, configured to determine a second probability corresponding to the second link according to the second path loss index, the second fading gain parameter, and the altitude difference; determining a ground base station closest to the high-altitude platform as a target ground base station;
an acquisition unit 4011, configured to acquire a probability density function corresponding to a horizontal distance between the target ground base station and the high-altitude platform;
a construction unit 4012, configured to determine a third probability corresponding to the third link according to the third path loss index, the third fading gain parameter, and the probability density function; and constructing the signal coverage model according to the first probability, the second probability and the third probability.
Optionally, the acquiring unit 4011 is specifically configured to acquire, when the first link is a line-of-sight wireless transmission link, a first association probability and a first successful access probability corresponding to the line-of-sight wireless transmission link; acquiring a second association probability and a second successful access probability corresponding to a non-line-of-sight wireless transmission link under the condition that the first link is the non-line-of-sight wireless transmission link;
the construction unit 4012 is specifically configured to determine a first probability corresponding to the first link according to the first association probability, the first successful access probability, the second association probability, and the second successful access probability.
Optionally, the construction unit 4012 is specifically configured to obtain a total coverage probability according to a product of the first probability, the second probability, and the third probability; and constructing the signal coverage model according to the total coverage probability.
Optionally, the processing unit 402 is specifically configured to determine that the signal coverage analysis result between the user equipment and the low-altitude platform is coverage success when the total coverage probability corresponding to the signal coverage model is greater than a preset probability threshold; and under the condition that the total coverage probability is smaller than or equal to the preset probability threshold value, determining that a signal coverage analysis result between the user equipment and the low-altitude platform is coverage failure.
As shown in fig. 5, a schematic structural diagram of an electronic device provided by the present invention may include: processor 510, communication interface (Communications Interface) 520, memory 530, and communication bus 540, wherein processor 510, communication interface 520, memory 530 complete communication with each other through communication bus 540. Processor 510 may invoke logic instructions in memory 530 to perform a signal coverage analysis method comprising: constructing a first link corresponding to the user equipment and a low-altitude platform, a second link corresponding to the low-altitude platform and a high-altitude platform, and a third link corresponding to the high-altitude platform and a ground base station; constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link; and determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model.
Further, the logic instructions in the memory 530 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of performing the signal coverage analysis method provided by the above methods, the method comprising: constructing a first link corresponding to the user equipment and a low-altitude platform, a second link corresponding to the low-altitude platform and a high-altitude platform, and a third link corresponding to the high-altitude platform and a ground base station; constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link; and determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform a signal coverage analysis method provided by the above methods, the method comprising: constructing a first link corresponding to the user equipment and a low-altitude platform, a second link corresponding to the low-altitude platform and a high-altitude platform, and a third link corresponding to the high-altitude platform and a ground base station; constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link; and determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A signal coverage analysis method, characterized by being applied to, comprising:
constructing a first link corresponding to the user equipment and a low-altitude platform, a second link corresponding to the low-altitude platform and a high-altitude platform, and a third link corresponding to the high-altitude platform and a ground base station;
constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link;
and determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model.
2. The method of claim 1, wherein the number of low-altitude platforms is a plurality and the number of ground base stations is a plurality, wherein the constructing a first link for a user device corresponding to a low-altitude platform, a second link for a low-altitude platform corresponding to a high-altitude platform, and a third link for a high-altitude platform corresponding to a ground base station comprises:
for any one of a plurality of low-altitude platforms, acquiring a first path loss index and a first fading gain parameter between the user equipment and the low-altitude platform; constructing a first link corresponding to the user equipment and the low-altitude platform according to the first path loss index and the first fading gain parameter;
Acquiring a second path loss index and a second fading gain parameter between the low-altitude platform and the high-altitude platform; constructing a second link corresponding to the low-altitude platform and the high-altitude platform according to the second path loss index and the second fading gain parameter;
acquiring a third path loss index and a third fading gain parameter between the high-altitude platform and the ground base station aiming at any one of the ground base stations; and constructing a third link corresponding to the high-altitude platform and the ground base station according to the third path loss index and the third fading gain parameter.
3. The method of claim 2, wherein the constructing a signal coverage model based on the first probability corresponding to the first link, the second probability corresponding to the second link, and the third probability corresponding to the third link comprises:
acquiring association probability and successful access probability between the user equipment and the low-altitude platform, and determining a first probability corresponding to the first link according to the association probability and the successful access probability;
acquiring the height difference between the low-altitude platform and the high-altitude platform; determining a second probability corresponding to the second link according to the second path loss index, the second fading gain parameter and the height difference;
Determining a ground base station closest to the high-altitude platform as a target ground base station, and acquiring a probability density function corresponding to the horizontal distance between the target ground base station and the high-altitude platform; determining a third probability corresponding to the third link according to the third path loss index, the third fading gain parameter and the probability density function;
and constructing the signal coverage model according to the first probability, the second probability and the third probability.
4. The method of claim 3, wherein the obtaining the association probability and the successful access probability between the ue and the low-altitude platform, and determining the first probability corresponding to the first link according to the association probability and the successful access probability, comprises:
acquiring a first association probability and a first successful access probability corresponding to the line-of-sight wireless transmission link under the condition that the first link is the line-of-sight wireless transmission link;
acquiring a second association probability and a second successful access probability corresponding to a non-line-of-sight wireless transmission link under the condition that the first link is the non-line-of-sight wireless transmission link;
And determining a first probability corresponding to the first link according to the first association probability, the first successful access probability, the second association probability and the second successful access probability.
5. A method according to claim 3, wherein said constructing said signal coverage model based on said first probability, said second probability and said third probability comprises:
obtaining total coverage probability according to the product of the first probability, the second probability and the third probability;
and constructing the signal coverage model according to the total coverage probability.
6. The method of claim 5, wherein determining a signal coverage analysis result between the user device and the low-altitude platform according to the signal coverage model comprises:
under the condition that the total coverage probability corresponding to the signal coverage model is larger than a preset probability threshold, determining that the signal coverage analysis result between the user equipment and the low-altitude platform is successful in coverage;
and under the condition that the total coverage probability is smaller than or equal to the preset probability threshold, determining that a signal coverage analysis result between the user equipment and the low-altitude platform is coverage failure.
7. A signal coverage analysis apparatus, comprising:
the construction module is used for constructing a first link corresponding to the low-altitude platform, a second link corresponding to the low-altitude platform and the high-altitude platform and a third link corresponding to the high-altitude platform and the ground base station of the user equipment; constructing a signal coverage model according to the first probability corresponding to the first link, the second probability corresponding to the second link and the third probability corresponding to the third link;
and the processing module is used for determining a signal coverage analysis result between the user equipment and the low-altitude platform according to the signal coverage model.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the signal coverage analysis method according to any one of claims 1 to 6 when executing the program.
9. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the signal coverage analysis method according to any one of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the signal coverage analysis method according to any one of claims 1 to 6.
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