CN108990146B - Method and device for acquiring coverage distance of positioning network and computer equipment - Google Patents
Method and device for acquiring coverage distance of positioning network and computer equipment Download PDFInfo
- Publication number
- CN108990146B CN108990146B CN201710401308.0A CN201710401308A CN108990146B CN 108990146 B CN108990146 B CN 108990146B CN 201710401308 A CN201710401308 A CN 201710401308A CN 108990146 B CN108990146 B CN 108990146B
- Authority
- CN
- China
- Prior art keywords
- positioning
- signal
- acquiring
- power
- free space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000001514 detection method Methods 0.000 claims description 40
- 230000008569 process Effects 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 7
- 238000012935 Averaging Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 abstract description 22
- 238000005516 engineering process Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to a method, a device and computer equipment for acquiring a coverage distance of a positioning network, which are used for acquiring positioning scene parameters and signal characteristic parameters in the positioning network; acquiring a free space loss value of a positioning signal according to the positioning scene parameter and the signal characteristic parameter; and acquiring the coverage distance of the positioning signal according to the free space loss value, wherein the coverage distance of the positioning signal under the specific scene acquired by the method is more accurate compared with the positioning network based on the PRS (general purpose radio signal) distributed by the communication base station in the prior art, so that the positioning base station is more reasonably deployed, and the deployment cost is reduced.
Description
Technical Field
The invention relates to the field of positioning of wireless communication networks, in particular to a method and a device for acquiring a coverage distance of a positioning network and computer equipment.
Background
With the development of wireless communication technology and the improvement of data processing capability, location-based services are one of the most promising businesses. The need to quickly and accurately obtain location information and provide location services, whether in indoor or outdoor environments, is becoming increasingly acute. Communication and positioning systems are merging and facilitating each other. The wireless communication and the parameter acquisition are utilized to determine the position, and the positioning information can be used for supporting the position service and optimizing the network management, thereby improving the position service quality and the network performance. Therefore, a positioning technology and a positioning system thereof for rapidly, accurately and robustly acquiring location information in various wireless networks have become a current research hotspot.
With the increasing demand of location services, more and more attention is paid to positioning technology, especially indoor positioning. The international organization for standardization 3GPP is advancing the establishment of high-precision indoor Positioning, and relates to PRS-Beacon (Positioning Reference Signal-Beacon, in chinese meaning: Beacon only sending Positioning Reference Signal), OTDOA (Observed Time Difference of Arrival Positioning method, in chinese meaning: Enhanced Cell-ID), ECID (Enhanced Cell-ID), and other key technologies. In the future, the research range is expanded, and the high-precision ground positioning network is deeply researched, wherein the technologies comprise base station deployment, network element planning, path fitting and the like.
In the conventional technology, a positioning network based on PRS is usually laid out by using communication base stations. However, when a positioning network is laid out by using a communication base station, the coverage distance of a positioning signal is not accurately obtained.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a method and an apparatus for acquiring a coverage distance of a positioning network, aiming to accurately acquire a coverage distance of a positioning signal in the positioning network.
The technical scheme adopted by the invention is as follows:
a method for acquiring coverage distance of a positioning network comprises the following steps:
acquiring positioning scene parameters and signal characteristic parameters;
acquiring a free space loss value of a positioning signal according to the positioning scene parameter and the signal characteristic parameter;
and acquiring the coverage distance of the positioning signal according to the free space loss value.
An acquisition device for positioning net coverage distance, the device comprising:
the parameter acquisition module is used for acquiring positioning scene parameters and signal characteristic parameters;
the loss value acquisition module is used for acquiring a free space loss value of a positioning signal according to the positioning scene parameter and the signal characteristic parameter;
and the coverage distance acquisition module is used for acquiring the coverage distance of the positioning signal according to the free space loss value.
A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method are implemented when the computer program is executed by the processor.
The invention provides a method, a device and computer equipment for acquiring a coverage distance of a positioning network, which are used for acquiring positioning scene parameters and signal characteristic parameters in the positioning network; acquiring a free space loss value of a positioning signal according to the positioning scene parameter and the signal characteristic parameter; and acquiring the coverage distance of the positioning signal according to the free space loss value, wherein the coverage distance of the positioning signal under the specific scene acquired by the method is more accurate compared with the positioning network based on the PRS signal distributed by the communication base station in the traditional technology, so that the positioning base station is more reasonably deployed, and the deployment cost is reduced.
Drawings
Fig. 1 is a flowchart of an embodiment of a method for acquiring a coverage distance of a positioning network according to the present invention;
fig. 2 is a flowchart of a method for acquiring a coverage distance of a positioning network according to a preferred embodiment of the present invention;
fig. 3 is a first scenario diagram of an embodiment of a method for acquiring a coverage distance of a positioning network according to the present invention;
fig. 4 is a second scenario scene diagram of an embodiment of a method for acquiring a coverage distance of a positioning network according to the present invention;
fig. 5 is a third scenario diagram of an embodiment of a method for acquiring a coverage distance of a positioning network according to the present invention;
FIG. 6 is a block diagram of an implementation routine of the device for obtaining coverage distance of a positioning network according to the present invention;
fig. 7 is a block diagram illustrating an internal structure of an embodiment of a computer device for locating a coverage distance of a network according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In a positioning network, the deployment of a positioning base station needs to fully consider the distance and range that can be covered by a positioning signal, but the distance and range that can be covered by the positioning signal are not only related to the strength of the positioning signal itself, but also affected by the specific environment in which the positioning base station needs to be deployed.
The 3GPP organization sets a project for PRS-Beacon technology, researches positioning network technology based on PRS, and the deployment of PRS positioning network needs to fully research the coverage range of positioning signals in a specific scene.
In the conventional technology, a communication base station is usually used to lay out a positioning network, but because the positioning distance and the communication distance are different in nature, when the positioning network is laid out by using the communication base station, the propagation distance of a positioning signal in positioning base station deployment is not accurately obtained, so that the positioning base station in the positioning network is unreasonably deployed, and further the positioning network is not optimized, which causes waste of resources and deployment cost.
Specifically, for the implementation of the communication function, the communication distance is obtained to ensure that each path of subcarrier signal of LTE (Long Term Evolution, which means: Long Term Evolution of the universal mobile telecommunications technology) signal can be normally received and demodulated, since the transmission data is modulated on each subcarrier and demodulated at the receiving end, the communication signal coverage distance depends on the propagation distance of each path of subcarrier, and the communication propagation distance of the kth path of subcarrier is denoted as dkK is more than or equal to 1 and less than or equal to N, and N is the number of subcarriers, the propagation distance of the communication signal in the communication network can be expressed as: dc＝min(dk) Normal reception and demodulation of the communication signal can be guaranteed.
Unlike the detection of communication signals, the positioning signal transmission does not need to demodulate signals, that is, in the most common time domain correlation detection method, it does not need to demodulate data carried by a received signal carrier, and the signal detection can be completed only when the correlation peak is greater than a certain preset threshold relative to the noise power. Therefore, the acquisition of the positioning distance does not need to ensure that each path of subcarriers must be normally received, but ensures that the total power of the superposed subcarriers is large enough, so that the positioning signal can be normally detected when signal correlation detection is carried out, and the positioning signal propagation distance is far greater than the propagation distance of the communication signal when the receiver carries out signal detection under the same condition.
Based on the analysis, the invention provides a method for acquiring the coverage distance of the positioning network based on accurate coverage distance acquisition of the positioning signals of the positioning network.
As shown in fig. 1, in one embodiment, a method for acquiring a coverage distance of a positioning network is provided, where the method is applicable to base station deployment of the positioning network, and the method includes the following steps:
and S1, acquiring positioning scene parameters and signal characteristic parameters.
The positioning scene parameter refers to a scene parameter affecting a positioning signal in a propagation process, and the signal characteristic parameter is a characteristic parameter of the positioning signal.
In one embodiment, step S1 includes:
s11, obtaining positioning scene parameters, wherein the positioning scene parameters comprise channel noise power of a positioning signal in a propagation process, a positioning signal detection threshold and path loss of all obstacles.
In this embodiment, the positioning network is a positioning network formed based on a PRS-Beacon technology, the PRS-Beacon only generates a positioning signal PRS without a communication function, and the generation of the PRS signal includes processes of encoding, modulating, IFFT inverse fast fourier transform, FFT fast fourier transform, demodulating, decoding, and the like. The PRS-Beacon positioning network can cover indoor and outdoor.
In this embodiment, the channel noise includes all noise that may be encountered, such as artificial noise, natural noise, and internal thermal noise, and the channel noise power refers to the sum of all noise powers of the positioning signal during propagation.
In this embodiment, the positioning signal detection threshold refers to the minimum signal power that can be used for positioning detection and is received by a receiver in a positioning network, that is, a minimum signal to interference plus noise ratio threshold that is used for correlation detection and can identify a correlation peak containing a signal is received by a receiving end of the receiver in the positioning network, a component smaller than the signal to interference plus noise ratio threshold is regarded as noise, and a component larger than the signal to interference plus noise ratio threshold is regarded as a signal. And the related detection is detection of a positioning signal for related equipment or an object when the positioning network coverage distance is acquired and the position service is provided in the designated positioning network. The minimum signal-to-interference-and-noise ratio of the correlation detection is related to the length of a symbol in one period of the positioning signal, the more the number of symbols in one period is, the better the correlation of the signal is, and the smaller the minimum signal-to-interference-and-noise ratio required by the correlation detection is.
Such obstacles include, but are not limited to, the following: the obstacle path loss refers to power loss of various obstacles encountered by the positioning signal in a propagation path, such as power loss caused by the positioning signal when the positioning signal penetrates through the obstacles in the propagation process of the positioning signal of the door, the window, the wall, the table, the chair and other office facilities.
Specifically, the positioning scene parameters are acquired and determined: including obtaining the channel noise power Pn(ii) a The minimum threshold T of the positioning signal detection is increased along with the length of the symbol in one period of the positioning signal, the value is reduced, and when the number of the symbols in one period of the positioning signal is recorded as n, the threshold is Tn(ii) a The antenna gain G, the path loss due to some kind of obstacle encountered during the propagation of the positioning signal is denoted as L.
Wherein, the antenna gain G is: the ratio of the power density of the signal generated by an actual antenna at the same point in space as an ideal radiating element, given equal input power, quantitatively describes the degree to which an antenna radiates the input power centrally. Antenna gain is a measure of the ability of an antenna to transmit and receive signals in a particular direction, and is one of the most important parameters for selecting a base station antenna. Increasing the antenna gain can increase the coverage of the network signal in a certain direction, or increase the gain margin in a certain range and increase the signal strength in the range. Under the same conditions, the higher the gain, the longer the distance the wave travels. Therefore, in a wireless network, antenna gain is generally adopted to increase signal coverage or enhance signal strength.
S12, obtaining signal characteristic parameters, wherein the signal characteristic parameters comprise frequency domain resources, time domain resources, each path of subcarrier power and antenna gain of the positioning signals.
In the LTE, resource REs may be regarded as a two-dimensional plane, and each RE may be regarded as a small square grid. The resource is a process of continuously transmitting small squares in the transmission process. Wherein, the RE (English is: Resource Element): refers to a subcarrier in frequency and a Symbol in time domain (also called Data Symbol), and is called an RE.
The time domain is an abscissa, continuous small squares are continuously transmitted along with the time, the frequency domain is an ordinate, which indicates how many small squares (i.e. bandwidth) can be transmitted at the same time at a certain time, and RB (i.e. Resource Block, which means Resource Block in chinese): there are 12 subcarriers in succession in frequency, one Slot in time domain (Slot refers to a Slot), which is called 1 RB.
In this embodiment, the frequency domain resource of the positioning signal refers to the number of frequency domain resource blocks of the frequency and the number of symbols of the data symbols of the time domain resource in one period. Assuming that the number of frequency domain resource blocks RB occupied by the positioning signal is m, the number of subcarriers is 12m, and the power P of each path of subcarrierskThe number of symbols of the time domain resource, that is, the number of symbols of the data symbols in one period of the positioning signal, is n.
And S2, acquiring a free space loss value of the positioning signal in free space propagation according to the positioning scene parameter and the signal characteristic parameter.
The free space refers to the transmission of electric waves when the surrounding is an infinite vacuum, and is an ideal propagation condition. When an electric wave propagates in free space, the energy of the electric wave is neither absorbed by an obstacle nor reflected or scattered, and the following can be understood: without any attenuation, without any blockage, without any multipath propagation space. In practice, however, the wireless communication is affected by various external factors, such as losses caused by atmosphere, obstructions, multipath, etc., and in this step, an ideal state is taken as an example.
The free space loss value refers to a loss value of a path loss part of the positioning signal in free space propagation except for obstruction shielding loss in the propagation process. Since electromagnetic waves are lossy when they penetrate any medium, free space loss describes the energy loss of the electromagnetic waves of a locating signal as they propagate through air.
In one embodiment, the step S2 includes:
s21, obtaining the minimum signal power which can be used for positioning detection and is received by a receiver in a positioning network according to the positioning signal detection threshold and the channel noise power;
in one embodiment, the minimum signal power received by a receiver in a positioning network and capable of performing positioning detection is obtained by the following formula: pr＝T·PnFormula (1);
in the formula (1), PrFor the minimum signal power received by a receiver in a positioning network and capable of positioning detection, T is the minimum signal-to-interference-and-noise ratio of relevant detection, PnFor locating the channel noise power at n symbols in a period of the signal, T.PnRepresents T and PnThe product of (a);
specifically, when the coverage distance of the positioning signal is acquired, the minimum signal-to-interference-and-noise ratio of the correlation detection is recorded as T, and the noise power is recorded as PnThen the minimum signal power received by the receiver to perform correlation detection is: pr＝T·Pn。
S22, acquiring the signal transmitting power of the positioning signal according to the power of each path of subcarrier;
in one embodiment, the positioning signal transmitting power is obtained according to each path of subcarrier transmitting power of the positioning signal, and the obtaining formula is as follows:
in the formula (2), PsFor locating signal transmission power, PkThe k path of subcarrier transmitting power is, and m is the number of frequency domain resource blocks;
here, in another embodiment, the positioning signal transmitting power may also be obtained according to the number of frequency domain resource blocks of the positioning signal, that is, the number of frequency domain resource blocks of the positioning signal is added to obtain the positioning signal transmitting power.
And S23, obtaining a free space loss value of the positioning signal in free space propagation according to the correlation relation among the path loss of all the obstacles, the minimum signal power, the signal transmitting power and the antenna gain.
In one embodiment, a free space loss value of the positioning signal in free space propagation is obtained by the following formula: PL is Ps+G-L0-PrEquation (3);
in formula (3), PL is the free space loss value, G is the transmit antenna gain, and L0Is the sum of all obstacle path losses, P, encountered by the positioning signal during propagationrIs the minimum signal power.
Specifically, the received signal power is recorded as PrThe path loss of the obstacle during the propagation of the positioning signal
Sum of L0Then the path loss margin of the positioning signal, i.e. the path loss part of the positioning signal in free space, can be tabulated
Shown as follows:
PL＝Ps+G-L0-Pr。
and the sum of the road losses of the obstacles is obtained in the process of transmitting the positioning signals according to the road losses of all the obstacles.
In this embodiment, the sum of the path loss of the obstacles refers to the sum of energy losses caused when a bit signal penetrates through various obstacles during propagation, and the obstacles include, but are not limited to, the following materials: glass window (2-4dB), concrete wall (13-18dB), gypsum board wall (3-5dB), metal board house (12-15dB), wooden door (3-5dB), etc., using L0The sum of the road losses of the obstacles is represented by L1、L2、L3…, indicating the path loss of each obstacle encountered by the positioning signal during propagation, L0＝L1+L2+L3+…。
And S3, acquiring the coverage distance of the positioning signal according to the free space loss value.
In one embodiment, the step S3 includes: and acquiring the coverage distance of the positioning signal according to the relation between the free space loss value and the positioning signal free space loss value formula.
The coverage distance of the positioning signal refers to obtaining a propagation distance of the positioning signal in the positioning network, and specifically, refers to transmitting the positioning signal to a receiving end through antenna gain, free space fading and barrier shielding loss, and effectively detecting the farthest propagation distance of a correlation peak where the positioning signal is located at the receiving end and a local template signal through a time domain correlation method, so that the following processes are required to obtain the propagation distance of the positioning signal:
1) obtaining the sum of the road loss of the obstacles;
2) obtaining a free space loss value;
3) obtaining antenna gain;
4) and acquiring the propagation distance of the positioning signal.
In one embodiment, the step of obtaining the coverage distance of the positioning signal according to the relationship between the free space loss value and the positioning signal free space loss value formula includes: according to a free space loss value formula of the positioning signal: the formula (4) when PL is 32.44+20logd +20logf, in combination with the free space loss value obtained in the embodiment of step S2, derives an obtaining formula of the propagation distance of the positioning signal:
PL in the formula (4) is a free space loss value;
in the formulas (4) and (5), d is the propagation distance of the positioning signal, f is the working frequency of the positioning signal, and the propagation distance of the positioning signal is the coverage distance of the positioning signal, that is, the coverage distance of the positioning network.
The free space loss value formula is a fixed formula, and is an original free space loss formula, wherein the free space loss describes energy loss of electromagnetic waves when the electromagnetic waves propagate in air, and the electromagnetic waves are all lost when penetrating any medium: spatial loss 20lg (f) +20lg (d) + 32.44; f is frequency, unit: MHz; d is distance, unit: km. When the method is used specifically, different models can be selected for use according to different scenes, but the method cannot deviate from the original formula, and the original calculation formula is adopted in the embodiment.
In one embodiment, in order to determine the coverage distance of the positioning net more accurately, the step S3 further includes:
and averaging according to the propagation distances of the positioning signals at least twice to obtain the average coverage distance of the positioning signals.
Referring to fig. 2, in an embodiment, when acquiring the propagation distance of the positioning signal, in order to further make the acquired propagation distance of the positioning signal more accurate, an average value of the propagation distances of the signals is taken multiple times, that is, the average propagation distance of the positioning signal is taken to determine the coverage distance of the positioning signal, for example, when acquiring the coverage distance of the positioning signal, the acquisition average value of the propagation distances of the positioning signal is taken j times, and then the acquisition formula of the coverage distance of the positioning signal in the positioning network is:
in the formula (6), the first and second groups,
for j mean propagation distances of the positioning signal, diThe propagation distance of the positioning signal acquired at the ith time.
In one embodiment, the step of obtaining the coverage distance of the positioning signal according to the relationship between the free space loss value and the positioning signal free space loss value formula further includes: and forming a scheme for deploying the base station in the positioning network according to the coverage distance of the positioning signal.
According to the coverage distance of the positioning signals in a specific scene, a deployment scheme of the positioning base station in the specific scene is formed, the positioning base station is deployed at the specific scene, and the distance between the base stations is long to form a positioning network, so that the positioning signals can be successfully detected, high-quality positioning service is provided, the deployment cost can be saved, and the comprehensive benefit is improved.
Further, a scheme for deploying the base stations in the positioning network can be formed according to the average coverage distance.
In order to understand the above scheme more clearly, the following describes the above method in a specific case of different scenarios: and (I) the signal is transmitted without obstruction.
As shown in fig. 3, the positioning scene is outdoor, no obstacle exists between the positioning base station and the terminal, the positioning signal is a PRS downlink positioning reference signal, and the length of a PRS transmitted symbol at each time is n1With a positioning detection threshold of
Operating frequency of f1With a subcarrier transmission power of
The number of resource blocks is m1The antenna gain is G1The channel noise power is
The acquisition process of the coverage distance of the positioning signal is as follows:
(1) in the process of positioning signal propagation, no obstacle is shielded, and the obstacle path loss is L0＝0；
(2) Minimum signal power for position detection is
Signal transmission power of
Obtaining a free space loss value of a signal:
(3) the coverage distance traveled by the positioning signal can be expressed as:
repeating the processes (1), (2) and (3) j times, and acquiring the propagation average distance of the positioning signal in the scene as follows:
and secondly, the signal transmission is shielded by a wooden door.
As shown in fig. 4, the positioning scene is indoor, a wooden door exists between the base station and the terminal for blocking, the signal continues to propagate after penetrating through the wooden door, and the wooden door path loss is L1The positioning signal is a PRS downlink positioning reference signal, and the length of each transmitted symbol of the PRS is n2The positioning detection threshold is the threshold of positioning detection
Operating frequency of f2With a subcarrier transmission power of
The number of resource blocks is m2The antenna gain is G2The channel noise power is
The acquisition process of the propagation distance of the positioning signal is as follows:
(1) signal propagation through wooden door, loss L1The sum of the path losses is L0＝L1；
(2) Minimum signal power for position detection is
Signal transmission power of
Obtaining a free space loss value of a positioning signal:
(3) the coverage distance over which the positioning signal propagates can be expressed as:
repeating the processes (1), (2) and (3) j times, and acquiring the coverage average distance of the positioning signal in the scene as follows:
and thirdly, the signal transmission is shielded by a wooden door and a wall.
As shown in fig. 5, the positioning scene is indoor, a wooden door and a concrete wall are arranged between the base station and the terminal for blocking, the signal is continuously transmitted after penetrating, and the wooden door path loss is L1Concrete wall road damage is L2The positioning signal is a PRS downlink positioning reference signal, and the length of each transmitted symbol of the PRS is n3The positioning detection threshold is the threshold of positioning detection
Operating frequency of f3With a subcarrier transmission power of
The number of resource blocks is m3The antenna gain is G3The channel noise power is
The acquisition process of the coverage distance of the positioning signal is as follows:
(1) signal propagation through wooden door loss L1Penetration loss of L through concrete wall2The sum of the path losses is L0＝L1+L2；
(2) Position detectionSmall signal power of
Signal transmission power of
Obtaining a free space loss value of a signal:
(3) the coverage distance over which the positioning signal propagates can be expressed as:
repeating the processes (1), (2) and (3) j times, and acquiring the coverage average distance of the positioning signal in the scene, wherein the coverage average distance is represented as:
in view of the above, the method for acquiring the coverage distance of the positioning network provided by the invention acquires the positioning scene parameters and the signal characteristic parameters; acquiring a free space loss value of a positioning signal according to the positioning scene parameter and the signal characteristic parameter; the method comprises the steps of obtaining the coverage distance of a positioning signal according to the free space loss value, detecting the signal by utilizing time domain correlation, correlating the received positioning signal with a local template signal by utilizing the structural characteristics of the positioning signal and the good correlation of a PRS signal, calculating the minimum power of the received signal according to the minimum signal-to-noise ratio of the positioning signal detection, calculating the free space loss value according to the sum of transmitted signal power, barrier path loss and antenna gain, and obtaining the coverage distance of the positioning signal.
As shown in fig. 6, in one embodiment, an acquisition apparatus for positioning a coverage distance of a mesh is provided, the apparatus comprising:
a parameter obtaining module 10, configured to obtain a positioning scene parameter and a signal characteristic parameter;
in this embodiment, the positioning scene parameters and the signal characteristic parameters are set by a technician according to a specific positioning scene and a requirement, input through an input device connected to the terminal or read from a device connected to a network interface of the terminal, and acquired by a central processing unit of the terminal and stored in a memory;
a loss value obtaining module 20, configured to obtain a free space loss value of the positioning signal according to the positioning scene parameter and the signal characteristic parameter;
in this embodiment, the free space loss value is obtained by a central processing unit of the terminal through calculation according to the obtained positioning scene parameters and signal characteristic parameters, and is mainly obtained by calculation of a preset program;
a covering distance obtaining module 30, configured to obtain a covering distance of the positioning signal according to the free space loss value;
in this embodiment, the coverage distance is calculated and obtained by the central processing unit of the terminal according to the relationship between the free space loss value obtained by calculation and the free space loss value formula of the positioning signal, and is displayed by the display unit of the terminal, and further, the positioning scene parameter and the signal characteristic parameter related to the coverage distance of this time can be also displayed by the display unit.
In one embodiment, the parameter obtaining module 10 includes:
the system comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring positioning scene parameters, and the positioning scene parameters comprise channel noise power of a positioning signal in a transmission process, a positioning signal detection threshold and path loss of all obstacles;
and the second acquisition module is used for acquiring signal characteristic parameters, wherein the signal characteristic parameters comprise frequency domain resources, time domain resources, each path of subcarrier power and antenna gain of the positioning signals.
In one embodiment, the loss value acquisition module 20 includes:
a minimum signal power obtaining unit, configured to obtain, according to the positioning signal detection threshold and the channel noise power, a minimum signal power that can be used for positioning detection and is received by a receiver in a positioning network;
a signal transmitting power obtaining unit, configured to obtain a signal transmitting power of the positioning signal according to the transmitting power of each channel of subcarriers;
and the space loss value acquisition unit is used for acquiring a free space loss value of the positioning signal in free space propagation according to the correlation relationship among the path loss of all the obstacles, the minimum signal power, the signal transmitting power and the antenna gain.
In one embodiment, the coverage distance obtaining module 30 further includes:
and averaging according to the coverage distances of the positioning signals at least twice to obtain the average coverage distance of the positioning signals.
In this embodiment, the calculation of the average value is obtained by the central processing unit of the terminal, and the calculated coverage distance of the positioning signal and the calculation result of the average coverage distance may be displayed by the display unit of the terminal.
In an embodiment, the present invention further provides a computer device, please refer to fig. 7, where the computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method when executing the computer program.
In summary, according to the method, the device and the computer device for acquiring the coverage distance of the positioning network, provided by the invention, the positioning scene parameters and the signal characteristic parameters are acquired; acquiring a free space loss value of a positioning signal according to the positioning scene parameter and the signal characteristic parameter; and acquiring the coverage distance of the positioning signal according to the free space loss value. The method and the device for acquiring the coverage distance of the positioning signal in the positioning network base station deployment can realize accurate acquisition of the coverage distance of the positioning signal in the positioning network, so that the positioning base station deployment is more reasonable, the positioning network is optimized, the deployment cost is reduced, and the comprehensive benefit is improved.
It will be understood by those skilled in the art that all or part of the processes in the methods of the embodiments described above may be implemented by hardware related to instructions of a computer program, which may be stored in a computer readable storage medium, for example, in the storage medium of a computer system, and executed by at least one processor in the computer system, so as to implement the processes of the embodiments including the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for acquiring a coverage distance, the method comprising:
acquiring positioning scene parameters and signal characteristic parameters;
acquiring a free space loss value of a positioning signal according to the positioning scene parameter and the signal characteristic parameter;
and acquiring the coverage distance of the positioning signal according to the free space loss value, wherein the calculation formula is as follows:
wherein d is the coverage distance of the positioning signal, PsFor locating signal transmit power, T is the minimum signal to interference plus noise ratio, P, of the correlation detectionnFor locating the channel noise power, L, at n symbols in a cycle of the signal0G is the gain of the transmitting antenna and f is the working frequency of the positioning signal, which is the sum of the path loss of all the obstacles encountered by the positioning signal in the propagation process.
2. The method of claim 1, wherein the step of obtaining the positioning scene parameters and the signal feature parameters comprises:
acquiring positioning scene parameters, wherein the positioning scene parameters comprise channel noise power of a positioning signal in a transmission process, a positioning signal detection threshold and path loss of all obstacles;
and acquiring signal characteristic parameters, wherein the signal characteristic parameters comprise frequency domain resources, time domain resources, each path of subcarrier power and antenna gain of the positioning signals.
3. The method of claim 2, wherein the step of obtaining the free space loss value of the positioning signal according to the positioning scene parameter and the signal characteristic parameter comprises:
acquiring the minimum signal power which can be used for positioning detection and is received by a receiver in a positioning network according to the positioning signal detection threshold and the channel noise power;
acquiring the signal transmitting power of a positioning signal according to the power of each path of subcarrier;
and acquiring a free space loss value of the positioning signal in free space propagation according to the correlation relationship among the path loss of all the obstacles, the minimum signal power, the signal transmitting power and the antenna gain.
4. The method of claim 1, wherein the step of obtaining the coverage distance of the positioning signal according to the free space loss value comprises:
and acquiring the coverage distance of the positioning signal according to the relation between the free space loss value and the positioning signal free space loss value formula.
5. The method of claim 1, wherein the step of obtaining the coverage distance of the positioning signal according to the free space loss value further comprises:
and averaging according to the coverage distances of the positioning signals at least twice to obtain the average coverage distance of the positioning signals.
6. An apparatus for obtaining a coverage distance, the apparatus comprising:
the parameter acquisition module is used for acquiring positioning scene parameters and signal characteristic parameters;
the loss value acquisition module is used for acquiring a free space loss value of a positioning signal according to the positioning scene parameter and the signal characteristic parameter;
a covering distance obtaining module, configured to obtain a covering distance of the positioning signal according to the free space loss value, where a calculation formula is:
wherein d is the coverage distance of the positioning signal, PsFor locating signal transmit power, T is the minimum signal to interference plus noise ratio, P, of the correlation detectionnFor locating the channel noise power, L, at n symbols in a cycle of the signal0G is the gain of the transmitting antenna and f is the working frequency of the positioning signal, which is the sum of the path loss of all the obstacles encountered by the positioning signal in the propagation process.
7. The apparatus of claim 6, wherein the parameter obtaining module comprises:
the system comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring positioning scene parameters, and the positioning scene parameters comprise channel noise power of a positioning signal in a transmission process, a positioning signal detection threshold and path loss of all obstacles;
and the second acquisition module is used for acquiring signal characteristic parameters, wherein the signal characteristic parameters comprise frequency domain resources, time domain resources, each path of subcarrier power and antenna gain of the positioning signals.
8. The apparatus of claim 7, wherein the loss value obtaining module comprises:
a minimum signal power obtaining unit, configured to obtain, according to the positioning signal detection threshold and the channel noise power, a minimum signal power that can be used for performing positioning detection and is received by a receiver in a positioning network;
a signal transmitting power obtaining unit, configured to obtain a signal transmitting power of the positioning signal according to the power of each channel of subcarriers;
and the space loss value acquisition unit is used for acquiring a free space loss value of the positioning signal in free space propagation according to the correlation relationship among the path loss of all the obstacles, the minimum signal power, the signal transmitting power and the antenna gain.
9. The apparatus of claim 6, wherein the coverage distance acquisition module further comprises: and averaging according to the coverage distances of the positioning signals at least twice to obtain the average coverage distance of the positioning signals.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1-5 are implemented by the processor when executing the computer program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401308.0A CN108990146B (en) | 2017-05-31 | 2017-05-31 | Method and device for acquiring coverage distance of positioning network and computer equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401308.0A CN108990146B (en) | 2017-05-31 | 2017-05-31 | Method and device for acquiring coverage distance of positioning network and computer equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108990146A CN108990146A (en) | 2018-12-11 |
| CN108990146B true CN108990146B (en) | 2021-03-16 |
Family
ID=64501447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710401308.0A Active CN108990146B (en) | 2017-05-31 | 2017-05-31 | Method and device for acquiring coverage distance of positioning network and computer equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108990146B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111866894B (en) * | 2020-04-24 | 2024-12-20 | 中兴通讯股份有限公司 | Method and device for sending network signal of positioning network |
| CN113905435A (en) * | 2020-06-22 | 2022-01-07 | 中兴通讯股份有限公司 | Positioning method and device, and computer readable storage medium |
| CN112929812B (en) * | 2021-01-23 | 2022-07-29 | 东莞理工学院 | Indoor positioning method considering Bluetooth co-frequency interference |
| CN113115218B (en) * | 2021-03-16 | 2022-07-12 | 中国联合网络通信集团有限公司 | Method and device for determining coverage capability and storage medium |
| CN113115219A (en) * | 2021-03-16 | 2021-07-13 | 中国联合网络通信集团有限公司 | Coverage distance determination method and device |
| CN113115221B (en) * | 2021-03-16 | 2022-09-02 | 中国联合网络通信集团有限公司 | Method, device and equipment for determining coverage distance and storage medium |
| CN113115220B (en) * | 2021-03-16 | 2022-07-08 | 中国联合网络通信集团有限公司 | Coverage distance determination method and device and storage medium |
| CN113702959A (en) * | 2021-08-17 | 2021-11-26 | 泰凌微电子(上海)股份有限公司 | Wireless ranging method and device |
| CN114531364B (en) * | 2022-01-04 | 2023-12-15 | 四川天邑康和通信股份有限公司 | Router antenna management system |
| WO2024026795A1 (en) * | 2022-08-04 | 2024-02-08 | 北京小米移动软件有限公司 | Method for sending sidelink (sl) positioning reference signal (prs), and apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102017737A (en) * | 2007-08-24 | 2011-04-13 | 北方电讯网络有限公司 | Power control at a relay station in a wireless network |
| CN102098782A (en) * | 2011-03-22 | 2011-06-15 | 无锡智感星际科技有限公司 | Frequency modulation (FM) broadcast-based terminal positioning method and special positioning device |
| CN103650594A (en) * | 2011-05-06 | 2014-03-19 | 瑞典爱立信有限公司 | Methods and nodes supporting cell change |
| CN104462670A (en) * | 2014-11-24 | 2015-03-25 | 成都盛军电子设备有限公司 | Equipment performance evaluation system |
| CN106324585A (en) * | 2016-09-19 | 2017-01-11 | 裴庆祺 | Positioning method and positioning system based on signal emitting device antenna direction correction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3091367B1 (en) * | 2011-08-03 | 2019-10-09 | PoLTE Corporation | Multi-path mitigation in rangefinding and tracking objects using reduced attenuation rf technology |
-
2017
- 2017-05-31 CN CN201710401308.0A patent/CN108990146B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102017737A (en) * | 2007-08-24 | 2011-04-13 | 北方电讯网络有限公司 | Power control at a relay station in a wireless network |
| CN102098782A (en) * | 2011-03-22 | 2011-06-15 | 无锡智感星际科技有限公司 | Frequency modulation (FM) broadcast-based terminal positioning method and special positioning device |
| CN103650594A (en) * | 2011-05-06 | 2014-03-19 | 瑞典爱立信有限公司 | Methods and nodes supporting cell change |
| CN104462670A (en) * | 2014-11-24 | 2015-03-25 | 成都盛军电子设备有限公司 | Equipment performance evaluation system |
| CN106324585A (en) * | 2016-09-19 | 2017-01-11 | 裴庆祺 | Positioning method and positioning system based on signal emitting device antenna direction correction |
Non-Patent Citations (1)
| Title |
|---|
| Modeling Considerations for the High-Rise Scenario;Ericsson;《3GPP TSG RAN WG1 Meeting #76》;20140214;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108990146A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108990146B (en) | Method and device for acquiring coverage distance of positioning network and computer equipment | |
| US12136989B2 (en) | Method and apparatus for user localization and tracking using radio signals reflected by reconfigurable smart surfaces | |
| Ko et al. | Millimeter-wave channel measurements and analysis for statistical spatial channel model in in-building and urban environments at 28 GHz | |
| Wu et al. | CSI-based indoor localization | |
| Sahin et al. | Handling CCI and ICI in OFDMA femtocell networks through frequency scheduling | |
| Molisch et al. | Propagation issues for cognitive radio | |
| TWI613893B (en) | Method for reference signal transmission and reception, base station and user equipment | |
| JP5210864B2 (en) | Communication method and communication system in wireless network | |
| Bandiera et al. | A cognitive algorithm for received signal strength based localization | |
| Wu et al. | Measurement-based channel characterization for 5G downlink based on passive sounding in sub-6 GHz 5G commercial networks | |
| Yang et al. | A new positioning system using DVB-T2 transmitter signature waveforms in single frequency networks | |
| JP7161136B2 (en) | Station placement design device, station placement design method and program | |
| Han et al. | Enhancing wireless performance using reflectors | |
| Takada et al. | Spatio-temporal channel characterization in a suburban non line-of-sight microcellular environment | |
| CN114520997A (en) | Method, device, device and storage medium for locating 5G network interference source | |
| Bultitude et al. | A propagation-measurement-based evaluation of channel characteristics and models pertinent to the expansion of mobile radio systems to frequencies beyond 2 GHz | |
| Ko et al. | Measurements and analyses of 28 GHz indoor channel propagation based on a synchronized channel sounder using directional antennas | |
| Sadowski | Measurement of coherence bandwidth in uhf radio channels for narrowband networks | |
| Xu et al. | A high-performance measure for non-line-of-sight identification in MIMO-OFDM-based sensor networks | |
| Xue et al. | A probabilistic propagation graph modeling method for channel characterization in dense urban environments | |
| Gonsioroski et al. | Measurements and modeling of the mobile wireless channel at 2.4 GHz in urban and suburban areas | |
| Hussain et al. | Jammer Localization in the Internet of Vehicles: Scenarios, Experiments, and Evaluation | |
| Kwakkernaat et al. | Diagnostic analysis of radio propagation in UMTS networks using high-resolution angle-of-arrival measurements | |
| Denkovska et al. | DTT performance degradation in presence of coexisting LTE network interference | |
| Ohara et al. | Characterization of Broadband Mobile Communication Channel in 200MHz Band Based on Saleh-Valenzuela Model |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |