Antenna attitude planning method and device for wireless coverage of line scene

Abstract

The invention discloses an antenna attitude planning method and device for wireless coverage of a line scene. The method comprises the following steps: S1, acquiring a target sub-coverage area on the line scene corresponding to an antenna; s2, determining a target direction angle and a target downward inclination angle of the antenna based on the target sub-coverage area and the antenna main lobe center line; s3, adjusting the antenna to an initial target position according to the target direction angle and the target downward inclination angle of the antenna; and S4, adjusting the roll angle of the antenna, and rotating the antenna at the initial target position by taking the central line of the main lobe of the antenna as an axis so as to reduce the included angle between the projection direction of the horizontal main lobe and the tangential direction covering the central point. According to the application, the offset generated between the projection direction of the horizontal main lobe of the antenna and the longitudinal direction of the line scene can be compensated, the effective coverage distance of the base station antenna to the target sub-coverage area is increased, and the network quality is further improved.

Description

Technical Field

[0001] The present application relates to the field of network communication technology, and in particular to a method and device for antenna posture planning for wireless coverage in line scenarios. Background Art

[0002] Line scenarios are common scenarios for outdoor coverage of wireless communication networks, including roads (such as expressways, national roads, provincial roads, etc.), railways (including high-speed rail lines, ordinary railways, etc.), streets (main streets and lanes in cities, etc.), waterways and canals (such as rivers, canals, etc.), etc. Its characteristics are fixed or relatively fixed linear traffic routes, and users are densely concentrated in various means of transportation. The coverage method of outdoor line scenarios is to provide wide coverage through outdoor base stations. By planning the antenna posture of wireless coverage in line scenarios, wireless coverage in line scenarios can be optimized, thereby improving network quality.

[0003] However, in the prior art, the planning of the antenna posture for line scene wireless coverage mainly optimizes the antenna's downtilt angle and azimuth angle, which will cause the horizontal main lobe projection direction of the antenna to be offset from the longitudinal direction of the line scene, resulting in the problem of coverage range shrinkage in the line scene wireless coverage planning, thereby affecting the network quality. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide an antenna attitude planning method and device for wireless coverage of linear scenes in response to the above-mentioned deficiencies in the prior art. Using this method, the offset between the horizontal main lobe projection direction of the antenna and the longitudinal direction of the linear scene can be compensated, thereby increasing the effective coverage distance of the base station antenna to the target sub-coverage area, thereby improving the network quality.

[0005] In a first aspect, the present application provides an antenna attitude planning method for wireless coverage in a line scene, comprising:

[0006] S1. Obtain the target sub-coverage area on the line scene corresponding to the antenna;

[0007] S2. Determine the target direction angle and target downtilt angle of the antenna based on the target sub-coverage area and the centerline of the antenna main lobe;

[0008] S3. Adjust the antenna to the initial target position according to the target direction angle and target downtilt angle of the antenna;

[0009] S4. Adjust the roll angle of the antenna and rotate the antenna at the initial target position about the center line of the antenna main lobe to reduce the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

[0010] In some embodiments, step S1 specifically includes:

[0011] Determine the line length of the line scene according to the base station coverage distance;

[0012] According to the line length, the line scene is divided into multiple adjacent and non-overlapping sub-coverage areas;

[0013] According to the location of the base station where the antenna is located, the target sub-coverage area on the line scene corresponding to the antenna is obtained.

[0014] In some embodiments, two endpoints of the target sub-coverage area on the line scene are respectively a first endpoint and a second endpoint.

[0015] Step S2 specifically includes:

[0016] S21. Determine a first angle formed between the first endpoint, the second endpoint and the antenna in the target sub-coverage area according to the first endpoint, the second endpoint and the center line of the antenna main lobe;

[0017] S22. Determine the coverage center point of the target sub-coverage area pointed to by the center line of the antenna main lobe according to the intersection of the angle bisector of the first angle and the target sub-coverage area;

[0018] S23. According to the line connecting the antenna and the coverage center point, determine the target direction angle β and target downtilt angle α of the antenna that can maximize the energy radiated by the antenna and concentrate it in the target coverage area.

[0019] In some embodiments, step S4 specifically includes:

[0020] Adjust the roll angle of the antenna, rotate the antenna at the initial target position around the center line of the antenna main lobe so that the horizontal main lobe projection direction is parallel to the tangent direction of the coverage center point, and obtain the target roll angle, which can minimize the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

[0021] In some embodiments, step S4 specifically includes:

[0022] According to the following formula (1), the target roll angle of the antenna is calculated:

[0023]

[0024] Wherein, γ is the target roll angle after antenna adjustment, β is the target direction angle of the antenna, D is the horizontal distance between the antenna and the target sub-coverage area, and H is the vertical distance between the antenna and the target sub-coverage area.

[0025] In some embodiments, after step S4, the method further includes:

[0026] S5. Verify the wireless coverage of the target sub-coverage area by the antenna posture to determine the antenna posture that can meet the wireless coverage requirements of the target sub-coverage area, specifically including:

[0027] S51. Calculate the length of the horizontal main lobe projection according to the following formula (2):

[0028]

[0029] Where l is the length of the horizontal main lobe projection, θ H is the horizontal half-power angle of the antenna, H is the vertical distance between the antenna and the target sub-coverage area, and α is the target downtilt angle of the antenna;

[0030] S52. Calculate the effective coverage of the antenna in the line scene according to the length value of the horizontal main lobe projection and the distance between the first endpoint and the second endpoint in the target sub-coverage area;

[0031] S53. Verify whether the antenna posture complies with the wireless coverage requirements of the target sub-coverage area according to the effective coverage rate of the antenna in the online scene, so as to determine the optimal antenna posture that can meet the wireless coverage requirements of the target sub-coverage area.

[0032] In some embodiments, step S53 specifically includes:

[0033] S531. Determine whether the effective coverage of the antenna in the line scene is greater than or equal to the effective coverage threshold;

[0034] S532. If yes, the determined antenna posture is the antenna posture that meets the wireless coverage requirements of the target sub-coverage area;

[0035] If not, adjust the division method of the sub-coverage area in the line scene to generate a new target sub-coverage area, and repeat steps S1 to S4 to adjust the antenna posture corresponding to the new target sub-coverage area again until the antenna posture can meet the wireless coverage requirements of the new target sub-coverage area.

[0036] In a second aspect, the present application provides an antenna attitude planning device for wireless coverage of a line scene, the device comprising:

[0037] An acquisition module, which is configured to acquire a target sub-coverage area on a line scene corresponding to an antenna;

[0038] A determination module, connected to the acquisition module, configured to determine a target direction angle and a target downtilt angle of the antenna based on a target sub-coverage area and a centerline of a main lobe of the antenna;

[0039] A first adjustment module, connected to the determination module, configured to adjust the antenna to an initial target position according to a target direction angle and a target downtilt angle of the antenna;

[0040] The second adjustment module is connected to the first adjustment module and is configured to adjust the roll angle of the antenna, rotating the antenna at the target initial position about the center line of the antenna main lobe to reduce the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

[0041] In some embodiments, the second adjustment module is specifically used to adjust the roll angle of the antenna, and the antenna at the initial target position is rotated about the center line of the antenna main lobe so that the horizontal main lobe projection direction is parallel to the tangent direction of the coverage center point, thereby obtaining a target roll angle, wherein the target roll angle can minimize the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

[0042] In some embodiments, the second adjustment module is further used to calculate the target roll angle of the antenna according to the following formula (1):

[0043]

[0044] Wherein, γ is the target roll angle after antenna adjustment, β is the target direction angle of the antenna, D is the horizontal distance between the antenna and the target sub-coverage area, and H is the vertical distance between the antenna and the target sub-coverage area.

[0045] The antenna attitude planning method and device for wireless coverage of line scenes provided in the present application can adjust the angle between the horizontal main lobe projection direction of the antenna and the longitudinal direction of the line scene by acquiring the target sub-coverage area, determining the target direction angle and target downtilt angle of the antenna, adjusting the antenna to the initial target position, and adjusting the roll angle of the antenna. This can compensate for the offset between the horizontal main lobe projection direction of the antenna and the longitudinal direction of the line scene, increase the effective coverage distance of the base station antenna to the target sub-coverage area, and thus improve the network quality of the line scene. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0047] Figure 1 A schematic diagram of a flow chart of an antenna attitude planning method for wireless coverage in a line scene provided in an embodiment of the present application;

[0048] Figure 2 A flowchart of an application example of the antenna posture planning method for wireless coverage of a line scene provided in an embodiment of the present application;

[0049] Figure 3 A schematic diagram of the structure of a target sub-coverage area obtained in the antenna attitude planning method for line scene wireless coverage provided in an embodiment of the present application;

[0050] Figure 4 A structural schematic diagram of the roll angle adjustment of the antenna in the antenna attitude planning method for wireless coverage of a linear scene provided in an embodiment of the present application;

[0051] Figure 5 A schematic diagram of the structure of an auxiliary sphere used to determine a target roll angle in an antenna attitude planning method for wireless coverage of a linear scene provided in an embodiment of the present application;

[0052] Figure 6 A schematic diagram of the structure of an antenna attitude planning device for wireless coverage of a linear scene provided in an embodiment of the present application;

[0053] Figure 7 Another structural schematic diagram of an antenna attitude planning device for wireless coverage of a linear scene provided in an embodiment of the present application.

[0054] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the technical solution of the present application, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments and drawings described herein are only used to explain the present application, rather than to limit the present application.

[0056] It can be understood that, in the absence of conflict, the various embodiments in the present application and the various features in the embodiments can be combined with each other.

[0057] It can be understood that, for the convenience of description, the drawings of the present application only show the parts related to the present application, while the parts unrelated to the present application are not shown in the drawings.

[0058] It can be understood that each unit and module involved in the embodiments of the present application may correspond to only one physical structure, or may be composed of multiple physical structures, or multiple units and modules may be integrated into one physical structure.

[0059] It can be understood that the terms "first", "second", etc. in the embodiments of the present application are used to distinguish different objects, or to distinguish different processing of the same object, rather than to describe a specific order of objects.

[0060] It is understandable that, in the absence of conflict, the functions and steps marked in the flowcharts and block diagrams of the present application may occur in an order different from that marked in the drawings.

[0061] It is understood that the flowcharts and block diagrams of the present application illustrate the possible architectures, functions, and operations of the systems, devices, equipment, and methods according to the various embodiments of the present application. Among them, each box in the flowchart or block diagram may represent a unit, module, program segment, code, which contains executable instructions for implementing the specified functions. Moreover, each box or combination of boxes in the block diagram and flowchart may be implemented by a hardware-based system that implements the specified functions, or by a combination of hardware and computer instructions.

[0062] It can be understood that the units and modules involved in the embodiments of the present application can be implemented by software or hardware, for example, the units and modules can be located in a processor.

[0063] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0064] In the related technology, the planning of the antenna posture for wireless coverage of line scenes mainly optimizes the downtilt angle and azimuth angle of the antenna, which will cause the horizontal main lobe projection direction of the antenna (the direction of the projection of the main lobe on the horizontal ground in the direction of the line connecting the two intersection points of the antenna horizontal half-power angle and the main lobe) to be offset from the longitudinal direction of the line scene, resulting in the problem of coverage range shrinkage in the wireless coverage planning of line scenes, thereby affecting the network quality of the line scene.

[0065] The inventors have discovered through research that after adjusting the antenna to the initial target position of the target azimuth angle and the target downtilt angle, by rotating the antenna with the normal direction of the antenna front (the center line of the antenna main lobe corresponding to the strongest radiation direction in the main lobe) as the axis, the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point can be reduced, and the offset between the horizontal main lobe projection direction of the antenna and the longitudinal direction of the line scene can be compensated, thereby increasing the effective coverage distance of the base station antenna to the target sub-coverage area, and thereby improving the network quality of the line scene.

[0066] Based on this, in order to solve the problems of the prior art, the present invention proposes an antenna attitude planning method for wireless coverage of line scenes to increase the effective coverage distance of the base station antenna to the target sub-coverage area, thereby improving the network quality of the line scene.

[0067] Embodiment 1:

[0068] like Figure 1 As shown, the present application provides an antenna attitude planning method for wireless coverage in a line scene, including steps S1 to S4:

[0069] Step S1: Obtain a target sub-coverage area on a line scene corresponding to an antenna.

[0070] Here, the line scene refers to a fixed or relatively fixed linear traffic route, where users are densely concentrated in various traffic routes. For example, the line scene can be a highway, railway, street, waterway canal, etc. It should also be noted that the effective coverage of the line scene refers to the effective coverage of the traffic route.

[0071] The target sub-coverage area is a sub-coverage area on the current scene. During implementation, the line scene is divided into multiple sub-coverage areas by dividing the line scene. For example, the line scene can be divided according to the degree of curvature of the line scene. Specifically, for traffic routes with less curvature changes in the line scene, the traffic routes can be divided according to equal distances. For traffic routes with more curvatures in the line scene, the traffic routes can be divided into non-equidistant distances, for example, a larger division distance can be used for the more curved parts, and a smaller division distance can be used for the less curved parts.

[0072] In some implementations, the division distance for dividing the line scene may be determined according to the base station coverage distance. The larger the base station coverage distance, the larger the corresponding division distance, and the smaller the number of sub-coverage areas into which the line scene is divided.

[0073] During implementation, the target sub-coverage area on the line scene corresponding to the antenna is determined according to the location of the base station where the antenna is installed and the distance between each sub-coverage area. Specifically, the sub-coverage area that is closer to the antenna is obtained as the target sub-coverage area on the line scene corresponding to the antenna.

[0074] like Figure 3 As shown, the line scene S is segmented to form multiple sub-coverage areas (for example, base station coverage distance S1, base station coverage distance S2, etc.). The target sub-coverage area on the line scene corresponding to the antenna is obtained. For example, for base station A, the target sub-coverage area on the line scene corresponding to the antenna obtained is the base station coverage distance S1.

[0075] Step S2: Determine the target direction angle and target downtilt angle of the antenna based on the target sub-coverage area and the center line of the antenna main lobe.

[0076] Here, the center line of the antenna main lobe is a straight line corresponding to the strongest radiation direction in the main lobe of the antenna. In some embodiments, when designing the lobe of the antenna, the strongest radiation direction of the main lobe is designed to be perpendicular or approximately perpendicular to the front of the antenna, that is, the strongest radiation direction of the main lobe is designed to be the same or approximately the same as the detection direction of the front of the antenna.

[0077] The direction angle is the angle between the projection of the center line of the antenna main lobe in the horizontal direction parallel to the ground and the vertical line between the base station and the line scene. The downtilt angle is the angle between the center line of the antenna main lobe and the vertical direction perpendicular to the ground.

[0078] During implementation, the coverage center point of the antenna in the target sub-coverage area can be determined based on the principle of maximizing the energy radiated by the antenna and concentrating it in the target coverage area. The target direction angle and target downtilt angle of the antenna can be determined based on the positional relationship between the antenna and the coverage center point.

[0079] Specifically, the coverage center point of the antenna in the target sub-coverage area may be determined based on the traffic lines in the target sub-coverage area (for example, for traffic routes with less bending changes in line scenes). For example, the middle position of the traffic line in the target sub-coverage area is used as the coverage center point, or the intersection of the angle bisector between the two end points of the traffic line in the coverage area and the antenna in the coverage area is used as the coverage center point.

[0080] In some embodiments, the coverage center point of the antenna in the target sub-coverage area may also be determined based on the connecting line segments of the two endpoints of the traffic line in the target sub-coverage area (for example, for traffic routes with more bending changes in line scenes). For example, the middle position of the connecting line segments of the two endpoints of the traffic line in the target sub-coverage area is used as the coverage center point, and the intersection of the angle bisector between the two endpoints of the traffic line in the coverage area and the antenna in the connecting line segments of the two endpoints of the traffic line in the target sub-coverage area may also be used as the coverage center point.

[0081] like Figure 4 As shown, according to the intersection of the bisector of the angle (∠EAF) between the two end points (E, F) of the traffic line in the coverage area and the antenna (A) in the coverage area EF, the coverage center point T' of the antenna in the target sub-coverage area EF is determined. Then, according to the projection (OT') of the line connecting the antenna and the coverage center point (AT', which is the direction of the determined center line of the main lobe of the antenna) in the horizontal direction parallel to the ground (XOY plane) and the angle (∠T'OT) between the base station and the vertical line of the scene (OT), the target direction angle β of the antenna is determined, and according to the angle (∠OAT') between the line connecting the antenna and the coverage center point (AT') and the vertical direction (AO) perpendicular to the ground, the target downtilt angle α is determined. In this way, the target direction angle β and the target downtilt angle α of the antenna are determined, so that the energy radiated by the antenna can be maximized and concentrated in the target coverage area EF.

[0082] Step S3: According to the target direction angle and target downtilt angle of the antenna, the antenna is adjusted to the initial target position.

[0083] Here, the initial target position is the position of the antenna after the antenna adjusts the azimuth angle and the downtilt angle, which can define the direction of the center line of the antenna main lobe.

[0084] When implementing, Figure 4 As shown, after determining the target direction angle β and target downtilt angle α of the antenna, the antenna is adjusted to the initial target position, that is, the antenna main lobe center line AT' points to the coverage center point T' of the target sub-coverage area EF corresponding to the target direction angle β and target downtilt angle α.

[0085] Step S4. Adjust the roll angle of the antenna, and rotate the antenna at the initial target position about the center line of the antenna main lobe to reduce the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

[0086] Here, the roll angle of the antenna is the angle of rotation with the center line of the main lobe of the antenna as the axis. It can be understood that the direction of the center line of the main lobe of the antenna is the normal direction of the front face of the antenna. It should also be noted that during the design stage of the center line of the main lobe of the antenna, a slight deviation of the center line of the main lobe of the antenna can be allowed. At this time, the center line of the main lobe of the antenna and the normal direction of the front face of the antenna can be approximately treated as the same direction.

[0087] like Figure 4 As shown, the horizontal main lobe projection direction M1N1 of the antenna is: the direction of the projection of the main lobe on the ground (XOY plane) in the direction of the line connecting the two intersection points M1 and N1 formed by the antenna horizontal half-power angle (∠M1AN1) and the main lobe.

[0088] The tangent direction of the coverage center point T' can be determined according to the method of determining the coverage center point of the antenna in the target sub-coverage area. For example, for the coverage center point determined according to the traffic line in the target sub-coverage area, the tangent direction of the coverage center point is: the tangent direction of the traffic line where the coverage center point is located. For the coverage center point determined according to the connecting line segment of the two end points of the traffic line in the target sub-coverage area, the tangent direction of the coverage center point is: the tangent direction of the connecting line segment where the coverage center point is located (that is, the direction EF of the connecting line segment).

[0089] It should be noted that Figure 4 The target sub-coverage area in the example is a straight line segment, which is only an example. In actual applications, the target sub-coverage area can be a curved traffic line. When the target sub-coverage area is a straight line segment, the above two tangent directions for determining the coverage center point are the same direction (both EF); for a curved traffic line, the above two tangent directions for determining the coverage center are different.

[0090] During implementation, the roll angle is adjusted to rotate the antenna at the initial target position around the center line of the antenna main lobe, so as to adjust the horizontal main lobe projection direction M1N1 on the ground (XOY plane) and reduce the angle between the horizontal main lobe projection direction M1N1 and the tangent direction of the coverage center point T'.

[0091] It should also be noted that the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point (for example, ∠N1T'E) can be set according to actual needs. For example, the angle is set to be less than the roll angle threshold (for example, the roll angle threshold is set to 5°). In some embodiments, the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point is adjusted to zero to increase the effective coverage range of the antenna in the target sub-coverage area.

[0092] In this embodiment, by acquiring the target sub-coverage area, determining the target direction angle and target downtilt angle of the antenna, adjusting the antenna to the initial target position, and adjusting the roll angle of the antenna, the angle between the horizontal main lobe projection direction of the antenna and the longitudinal direction of the line scene can be adjusted to compensate for the offset between the horizontal main lobe projection direction of the antenna and the longitudinal direction of the line scene, thereby increasing the effective coverage distance of the base station antenna to the target sub-coverage area and improving the network quality of the line scene.

[0093] In some embodiments, step S1 specifically includes steps S11 to S13:

[0094] Step S11. Determine the line length of the line scene according to the base station coverage distance.

[0095] Here, the base station coverage distance is determined by the antenna pre-design. In some embodiments, the base station coverage distance can be determined based on the link budget. Specifically, it includes: (1) determining the parameters of the transmitter and the receiver, including the antenna port power of the transmitter, the minimum receiving level of the receiver, etc. These parameters are related to the equipment capabilities of the base station and the mobile phone, and are also related to the business requirements. (2) Considering the influencing factors of the wireless environment, such as shadow effect, multipath fading, interference, etc. These factors will affect the propagation and reception quality of the signal, and therefore need to be corrected and compensated in the link budget. For the coverage of line scenes, especially highway and railway scenes, it is generally the coverage of the line-of-sight range, and the shadow effect and multipath fading are not obvious. However, for waterways and canals, it is necessary to consider the reflection and refraction of the water surface. (3) Consider the penetration loss. The line scene is essentially a linear traffic scene or a rail traffic scene. Users are usually in a vehicle, so the traditional loss of the vehicle needs to be considered. Different vehicles and different parts of vehicles have different penetration losses, which need to be determined based on the actual propagation route combined with testing. (4) Select a suitable propagation model according to the coverage object, and calibrate the parameters of the propagation model through actual testing. Commonly used wireless coverage propagation models include COST231-Hata model, Okumura-Hata model, ray tracing model, etc. (5) The coverage distance of the base station can be calculated by combining the propagation model, the parameters of the transmitter and receiver, the influencing factors of the wireless environment and the penetration loss.

[0096] In some other implementations, the line length of the line scene may also be determined by the size of the horizontal main lobe projection direction in the antenna main lobe.

[0097] It should also be noted that the line length represents the length of a section of traffic line in the line scene.

[0098] Step S12: Divide the line scene into a plurality of adjacent and non-overlapping sub-coverage areas according to the line length.

[0099] Here, according to the line length, it means that the line scene is divided into multiple adjacent and non-overlapping sub-coverage areas by using an equidistant division method. The line length is the length of the traffic line in each sub-coverage area.

[0100] Step S13: According to the position of the base station where the antenna is located, obtain the target sub-coverage area on the line scene corresponding to the antenna.

[0101] Here, the antenna is installed on the base station, and each base station antenna radiates a certain range. The sub-coverage area on the line scene closest to the base station where the antenna is located is selected as the target sub-coverage area, so as to achieve stronger wireless coverage of the antenna to the target sub-coverage area.

[0102] In this embodiment, by determining the line length of the line scene and dividing the sub-coverage area, the target sub-coverage area on the line scene closer to the antenna can be determined according to the location of the base station where the antenna is located. In this way, each base station antenna can provide strong wireless coverage to the target sub-coverage area.

[0103] In some embodiments, two endpoints of the target sub-coverage area on the line scene are respectively a first endpoint and a second endpoint.

[0104] Step S2 specifically includes steps S21 to S23:

[0105] Step S21. Determine a first angle formed between the first endpoint, the second endpoint and the antenna in the target sub-coverage area according to the first endpoint, the second endpoint and the center line of the antenna main lobe.

[0106] like Figure 4 As shown, two endpoints of the target sub-coverage area EF on the line scene S are a first endpoint E and a second endpoint F respectively.

[0107] During implementation, the intersection point of the center line of the antenna main lobe on the antenna is determined as the first intersection point A, and then the first endpoint E, the first intersection point A, and the second endpoint F are connected in sequence to form a first angle (∠EAF).

[0108] Step S22: Determine the coverage center point of the target sub-coverage area pointed by the center line of the antenna main lobe according to the intersection of the angle bisector of the first angle and the target sub-coverage area.

[0109] It can be understood that the coverage center point determined by the intersection of the angle bisector of the first angle and the target sub-coverage area is the coverage center point determined according to the traffic line in the target sub-coverage area, which can be applicable to traffic routes with less curvature in line scenes.

[0110] like Figure 4 As shown, according to the intersection of the angle bisector of the first angle (∠EAF) and the target sub-coverage area EF, the coverage center point T' of the target sub-coverage area pointed by the center line of the antenna main lobe is determined.

[0111] Step S23: According to the line connecting the antenna and the coverage center point, determine the target direction angle β and target downtilt angle α of the antenna that can maximize the energy radiated by the antenna and concentrate it in the target coverage area.

[0112] Here, the target direction angle β and the target downtilt angle α are determined based on the line connecting the antenna and the coverage center point, that is, the target direction angle β and the target downtilt angle α are determined based on the line connecting the first intersection point A and the coverage center point T'. Among them, the target direction angle β is the angle (∠TOT') between the projection OT' of the line connecting the first intersection point A and the coverage center point T' on the ground (XOY plane) and the vertical line OT between the base station and the line scene. The target downtilt angle α is the angle (∠T'AO) between the line connecting the first intersection point A and the coverage center point T' and the vertical direction AO perpendicular to the ground (XOY plane).

[0113] In this embodiment, by forming the first angle and determining the coverage center point of the target sub-coverage area, the target direction angle β and the target downtilt angle α can be determined based on the line connecting the antenna and the coverage center point, so that the energy radiated by the antenna can be maximized and concentrated in the target coverage area.

[0114] In some embodiments, step S4 specifically includes:

[0115] Adjust the roll angle of the antenna, rotate the antenna at the initial target position around the center line of the antenna main lobe so that the horizontal main lobe projection direction is parallel to the tangent direction of the coverage center point, and obtain the target roll angle, which can minimize the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

[0116] Here, the horizontal main lobe projection direction is parallel to the tangent direction of the coverage center point, that is, the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point is 0, reaching the minimum.

[0117] It should also be noted that the tangent direction covering the center point may be the tangent direction covering the traffic route where the center point is located, or the tangent direction covering the connecting line segment where the center point is located (ie, the direction of the connecting line segment).

[0118] like Figure 4 As shown, when the target sub-coverage area is a straight line segment, the target roll angle γ can minimize the angle between the horizontal main lobe projection direction (adjusted from the M1N1 direction to the M2N2 direction) and the tangent direction (EF) of the coverage center point T' (0).

[0119] In this embodiment, by adjusting the roll angle of the antenna, the horizontal main lobe projection direction is made parallel to the tangent direction of the coverage center point, and the angle between the horizontal main lobe projection direction of the antenna and the longitudinal direction of the line scene can be adjusted to zero, thereby compensating for the offset between the horizontal main lobe projection direction of the antenna and the longitudinal direction of the line scene, increasing the effective coverage distance of the base station antenna to the target sub-coverage area, and thereby improving the network quality of the line scene.

[0120] In some embodiments, step S4 specifically includes:

[0121] According to the following formula (1), the target roll angle of the antenna is calculated:

[0122]

[0123] Wherein, γ is the target roll angle after antenna adjustment, β is the target direction angle of the antenna, D is the horizontal distance between the antenna and the target sub-coverage area, and H is the vertical distance between the antenna and the target sub-coverage area.

[0124] Figure 5 A schematic diagram of the structure of an auxiliary sphere used to determine the target roll angle in an antenna attitude planning method for wireless coverage of a linear scene provided in an embodiment of the present application, combined with Figure 4 and Figure 5 As shown, T is the foot of the perpendicular between the base station and the line scene vertical line OT on the line scene S (at this time, the horizontal main lobe projection direction M3N3 is tangent to point T, and the horizontal main lobe projection M3N3 has the maximum coverage on the line scene S), T' is the coverage center point in the target coverage sub-area EF, α is the target downtilt angle of the antenna, β is the target direction angle of the antenna, and α' is the downtilt angle when the antenna points to point T.

[0125] The movement of the center line of the main lobe on the line scene S (from T to T') causes the main lobe projection on the spherical surface to move accordingly (from B to C). Due to the combined effect of the downtilt angle and the azimuth angle, the projection of the center line of the main lobe on the spherical surface is displaced in the latitude and longitude directions. Therefore, the projection of the main lobe on the spherical surface is actually rotated. The angle of rotation of the spherical projection ∠BCC' is the roll angle γ. Where C' is the intersection of the latitude of the spherical surface where point C is located and the longitude of the spherical surface where point B is located, ∠BC'C = 90°. Based on the geometric relationship, formula (1) is derived to solve for γ:

[0126]

[0127] Wherein, γ is the target roll angle after antenna adjustment, β is the target direction angle of the antenna, D is the horizontal distance between the antenna and the target sub-coverage area (the length of line segment OT), and H is the vertical distance between the antenna and the target sub-coverage area (the length of line segment AO).

[0128] It should also be noted that the direction of the roll angle γ and the target direction angle β is related to each other: if OT' moves clockwise relative to OT, the antenna needs to roll counterclockwise, and vice versa. Figure 5 , Figure 5If OT' moves clockwise by β relative to OT, the antenna rotates counterclockwise with AT' as the rotation axis, and the horizontal main lobe direction (the direction of the line connecting the two intersection points formed by the antenna horizontal half-power angle and the main lobe) moves from CC' to CB, so that the angle between the horizontal main lobe projection direction (adjusted from M1N1 to M2N2) and the tangent direction of the coverage center point T' is zero.

[0129] In this embodiment, the roll angle calculated by the calculation formula of the adjusted roll angle of the antenna can adjust the direction of the line connecting the two intersection points formed by the horizontal half-power angle of the antenna and the main lobe, and then adjust the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point to zero, which can compensate for the offset between the horizontal main lobe projection direction of the antenna and the longitudinal direction of the line scene, increase the effective coverage distance of the base station antenna to the target sub-coverage area, and thus improve the network quality of the line scene.

[0130] In some embodiments, after step S4, the method further comprises:

[0131] Step S5. Verify the wireless coverage of the target sub-coverage area by the antenna posture to determine the antenna posture that can meet the wireless coverage requirements of the target sub-coverage area, specifically including steps S51 to S53:

[0132] Step S51. Calculate the length of the horizontal main lobe projection according to the following formula (2):

[0133]

[0134] Where l is the length of the horizontal main lobe projection, θ H is the horizontal half-power angle of the antenna, H is the vertical distance between the antenna and the target sub-coverage area, and α is the target downtilt angle of the antenna.

[0135] Here, the horizontal half-power angle of the antenna refers to the beam width of the antenna in the horizontal direction, that is, the angle range when the antenna drops 3dB on both sides of the maximum radiation direction in the horizontal direction (that is, the power density is reduced to half of the maximum value). The horizontal half-power angle of the antenna is an inherent property of the antenna, which is related to factors such as the design of the antenna (dipole antenna, array antenna, parabolic antenna, etc.), the size of the antenna, the wavelength of the antenna, and the manufacturing accuracy of the process.

[0136] For example, if the antenna horizontal half-power angle is 60° (π / 3), the vertical distance between the antenna and the target sub-coverage area is 50 meters, and the target downtilt angle is 60°, the calculated length of the horizontal main lobe projection is 104.67 meters.

[0137] Step S52: Calculate the effective coverage of the antenna in the line scene according to the length value of the horizontal main lobe projection and the distance between the first endpoint and the second endpoint in the target sub-coverage area.

[0138] Here, the distance between the first endpoint and the second endpoint in the target sub-coverage area is the distance between the line segment connecting the first endpoint and the second endpoint. The effective coverage rate of the antenna in the line scene can be calculated according to the following formula (3):

[0139] η=l / L (3)

[0140] Wherein, η is the effective coverage rate of the antenna in the line scene, l is the length value of the horizontal main lobe projection, and L is the distance between the first endpoint and the second endpoint in the target sub-coverage area.

[0141] Continue to refer to Figure 3 , the line length of each sub-coverage area (the line length between the first end point and the second end point, such as the base station coverage distance S1) is 120 meters, there is a curved road in the line scene, and the distance between the first end point and the second end point is 100 meters. For the case where the length value of the horizontal main lobe projection is 104.67 meters, the calculated effective coverage rate of the antenna in the line scene is 104.67%.

[0142] Step S53: Verify whether the antenna posture complies with the wireless coverage requirements of the target sub-coverage area according to the effective coverage rate of the antenna in the online scene, so as to determine the optimal antenna posture that can meet the wireless coverage requirements of the target sub-coverage area.

[0143] In this embodiment, by calculating the length value of the horizontal main lobe projection, calculating the effective coverage rate of the antenna in the line scene, and verifying the wireless coverage of the target sub-coverage area by the antenna posture, the antenna posture that meets the wireless coverage requirements of the target sub-coverage area can be determined, thereby determining the antenna posture of each base station that meets the wireless coverage requirements of the line scene to ensure the network quality of the line scene.

[0144] In some embodiments, step S53 specifically includes steps S531 to S533:

[0145] Step S531: Determine whether the effective coverage rate of the antenna in the line scene is greater than or equal to the effective coverage rate threshold.

[0146] Here, the effective coverage rate threshold of the antenna in the line scene can be determined according to the design requirements, for example, according to the curvature of the line scene, the effective coverage rate of the antenna in the line scene is determined. For traffic routes with less curvature in the line scene, a smaller effective coverage rate threshold (for example, 95%) can be set; for traffic routes with more curvature in the line scene, a larger effective coverage rate threshold (for example, 102%) can be set.

[0147] Step S532: If yes, the determined antenna posture is the antenna posture that meets the wireless coverage requirement of the target sub-coverage area.

[0148] For example, in the above example, the line length of each sub-coverage area is 120 meters, there is a curved road in the line scene, the distance between the first endpoint and the second endpoint of the line segment is 100 meters, the length value of the horizontal main lobe projection is 104.67 meters, and the effective coverage rate of the antenna in the line scene is 104.67%. If the effective coverage rate threshold is 102%, the determined antenna posture is the antenna posture that meets the wireless coverage requirements of the target sub-coverage area.

[0149] Step S533. If not, adjust the division method of the sub-coverage area in the line scene to generate a new target sub-coverage area, and repeat steps S1 to S4 to adjust the antenna posture corresponding to the new target sub-coverage area again until the antenna posture can meet the wireless coverage requirements of the new target sub-coverage area.

[0150] Here, when the effective coverage rate of the antenna in the line scene is less than the effective coverage rate threshold, it is necessary to adjust the division method of the sub-coverage area in the line scene, for example, the line length can be adjusted to divide more sub-coverage areas. The base station antenna distance can also be optimized to re-divide the line scene, generate a new target sub-coverage area, and repeat steps S1 to S4 to adjust the antenna posture corresponding to the new target sub-coverage area again until the antenna posture can meet the wireless coverage requirements of the new target sub-coverage area.

[0151] In this embodiment, by judging the effective coverage rate of the antenna in the line scene and when the effective coverage rate is less than the effective coverage rate threshold, by adjusting the division method of the sub-coverage area in the line scene and adjusting the antenna posture corresponding to the new target sub-coverage area again, the antenna posture that can meet the wireless coverage requirements of the new target sub-coverage area can be determined to ensure the network quality of the line scene.

[0152] Embodiment 2:

[0153] The specific implementation process of the above method is described below in conjunction with specific application examples.

[0154] At present, the antenna planning method for line scenes mainly uses the prediction results of propagation models or channel models to infer the antenna posture with the best coverage effect, where the antenna posture mainly includes the downtilt angle and the azimuth angle. However, since the horizontal scale of the line scene is much smaller than the vertical scale, the effective coverage range of the line scene actually refers to the vertical length. If only the downtilt angle and the azimuth angle are adjusted, the horizontal main lobe projection direction will be offset from the vertical direction of the line scene, thereby affecting the vertical length of the antenna main lobe (the lobe with the strongest radiation direction in the antenna radiation) covering the line scene.

[0155] The present embodiment provides a method for determining the roll angle of a base station antenna in a wireless communication network, which can be used for planning and optimizing antenna coverage and engineering parameters in a linear scenario. Antenna roll means rotating around the normal direction of the front of the antenna to compensate for the impact of the reduction in the effective coverage of the antenna caused by the antenna azimuth and downtilt angle. The linear scenario refers to a linear distribution of coverage objects, usually including highways (such as expressways, national roads, provincial roads, etc.), railways (including high-speed rail lines, ordinary railways, etc.), streets (main streets and lanes in cities), waterways and canals (such as rivers, canals, etc.), etc.

[0156] like Figure 2 As shown, the specific implementation process of this embodiment is divided into the following three steps:

[0157] Step 100: Determine the sub-coverage area

[0158] First, determine the required signal quality based on the business needs of the scene, then determine the base station coverage distance based on the link budget, and finally segment the line scene based on the base station coverage distance to form various sub-coverage areas. Figure 3 As shown, the line scene is segmented to form multiple sub-coverage areas (for example, base station coverage distance S1, base station coverage distance S2, etc.).

[0159] If this method is used to plan new line scene coverage, a suitable base station site location can be selected near the center of each sub-coverage area (for example, base station coverage distance S1 corresponds to base station A). If this method is used to optimize the existing line scene coverage, the existing network base station site location of each sub-coverage area needs to be obtained.

[0160] Among them, the general method for determining the site coverage distance based on the link budget is:

[0161] (1) Determine the parameters of the transmitter and receiver, including the antenna power of the transmitter and the minimum receiving level of the receiver. These parameters are related to the equipment capabilities of the base station and mobile phone, as well as the service requirements.

[0162] (2) Consider the influencing factors of the wireless environment, such as shadow effects, multipath fading, interference, etc. These factors will affect the propagation and reception quality of the signal, so they need to be corrected and compensated in the link budget. For line coverage, especially road and railway coverage, it is generally line-of-sight coverage, and shadow effects and multipath fading are not obvious. However, for waterways and canals, reflection and refraction on the water surface need to be considered.

[0163] (3) Consider penetration loss. Line scenarios are essentially linear traffic scenarios or rail transit scenarios. Users are usually in vehicles, so the traditional losses of vehicles need to be considered. Different vehicles and different parts of vehicles have different penetration losses, which need to be determined based on actual propagation routes and tests.

[0164] (4) Select an appropriate propagation model based on the coverage object and calibrate the parameters of the propagation model through actual testing. Commonly used wireless coverage propagation models include COST231-Hata model, Okumura-Hata model, ray tracing model, etc.

[0165] (5) The coverage distance of the base station can be calculated by combining the propagation model, the parameters of the transmitter and receiver, the influencing factors of the wireless environment, and the penetration loss.

[0166] Step 200: For each sub-coverage area, according to the spatial positions of the base station and the coverage object, the optimal combination of the azimuth angle, the downtilt angle and the roll angle is solved.

[0167] The spatial location of base stations and sub-coverage areas can be determined by Figure 4 Indicates. The sub-coverage area is the line scene S. The antenna is installed at point A on the tower platform, O is the projection point of the tower on the horizontal plane, point T is the foot of the perpendicular between OT and the line scene S, the vertical distance to the line scene is H, and the horizontal distance is D. The direction of the antenna main lobe (the spatial direction of the strongest radiation direction of the antenna main lobe) is directly opposite to point T of the sub-coverage area, and the distance is R. The angle between the main lobe direction of the antenna and the vertical direction is the downtilt angle α. The angle between the horizontal direction of the main lobe of the antenna (such as OT') and the base station and the vertical line OT of the line scene is the direction angle β. The coverage range of the antenna is the projection of the main lobe of the antenna on the coverage object.

[0168] (1) Optimal azimuth and downtilt angle (target azimuth and target downtilt angle)

[0169] Planning method for antenna azimuth and downtilt angle in line scenario: maximize the energy radiated by the antenna and concentrate it in the coverage area, that is, align the direction of the antenna main lobe with the bisector of the angle between the antenna and the first and second endpoints of the line coverage area (the first endpoint E and the second endpoint F). At this time, the projection of the antenna main lobe in the coverage area is the largest, and the effective coverage distance is the largest.

[0170] (2) Optimal roll angle (target roll angle)

[0171] When the angle between the horizontal direction OT of the antenna main lobe and the vertical line of the base station and the line scene is 0 (that is, the direction angle is 0), the horizontal projection of the main lobe in the coverage area is consistent with the tangent direction of the line scene, that is, parallel to the straight line L. However, when the coverage object (point T') is far away from the base station and the foot of the vertical line of the line scene (point T), the direction angle β increases. Due to the combined effect of the downtilt angle and the direction angle, the projection of the main lobe in the coverage area will be distorted, and its horizontal projection (M1N1) will be offset from the tangent direction of the line scene (line scene S or TT' direction), resulting in the reduction of the main lobe projection. The offset angle can be compensated by rolling the antenna, thereby increasing the projection range of the main lobe in the coverage area. Antenna rolling means rotating with the normal direction of the front of the antenna as the axis. The rotation angle of the antenna along the normal direction of the front of the antenna as the axis is the roll angle γ.

[0172] The optimal roll angle can make the horizontal projection of the main lobe (horizontal main lobe projection direction) in the coverage area parallel to the tangent direction of the coverage center point. At this time, the overlap area between the main lobe projection and the coverage area is the largest, that is, the coverage area is the largest. In order to solve the optimal roll angle, an auxiliary sphere can be added to assist in the calculation.

[0173] like Figure 5 As shown in the figure, the main lobe direction (main lobe center line) moves on the line scene (from T to T'), and the main lobe projection on the spherical surface also moves accordingly (from B to C). Due to the combined effect of the downtilt angle and the azimuth angle, the projection of the main lobe center point on the spherical surface shifts in the latitude and longitude directions, so the projection of the main lobe on the spherical surface actually rotates, and the angle of rotation of the spherical projection is the roll angle. Based on the geometric relationship, formula (1) is derived to solve γ:

[0174]

[0175] Where α' is the downtilt angle of the movement to T', α is the downtilt angle of the initial T,

[0176] The relationship between the roll angle γ and β is: if OT' moves clockwise relative to OT, the antenna needs to roll counterclockwise, and vice versa.

[0177] Step 300: Verify the wireless coverage of the target sub-coverage area by the antenna attitude according to the effective coverage rate of the main lobe.

[0178] After the antenna compensates for the roll angle γ, the horizontal main lobe projection direction overlaps with the line scene direction, and the energy radiated by the antenna is concentrated on the line scene. At this time, the effective coverage rate of the main lobe is the highest. According to the following formula (2), the length of the horizontal main lobe projection is calculated:

[0179]

[0180] Where l is the length of the horizontal main lobe projection, θ H is the horizontal half-power angle of the antenna, H is the vertical distance between the antenna and the target sub-coverage area, and α is the target downtilt angle of the antenna.

[0181] The effective coverage of the antenna in the line scenario can be calculated according to the following formula (3):

[0182] η=l / L (3)

[0183] Wherein, η is the effective coverage rate of the antenna in the line scene, l is the length value of the horizontal main lobe projection, and L is the distance between the first endpoint and the second endpoint in the target sub-coverage area.

[0184] If the effective coverage rate is lower than the coverage target threshold (the coverage target threshold can be determined according to planning or optimization purposes, generally greater than or equal to 95%), it is necessary to adjust the planned coverage area or base station location, and then repeat the second step.

[0185] The present invention proposes a method for compensating the offset between the antenna and the coverage object caused by the downtilt angle and the azimuth angle through antenna roll, a method for calculating the antenna roll angle, and a planning and optimization method for antenna roll in a line scene. The present invention solves the problem of coverage range shrinkage that cannot be solved in the current line scene wireless coverage planning, effectively improves the coverage distance of the line scene base station, reduces the number of base stations, saves construction costs, and improves network quality.

[0186] Embodiment 3:

[0187] like Figure 6 As shown, the present application provides an antenna attitude planning device for wireless coverage of a line scene, and the device 100 includes:

[0188] An acquisition module 11, which is configured to acquire a target sub-coverage area on a line scene corresponding to the antenna;

[0189] A determination module 12, connected to the acquisition module 11, is configured to determine a target direction angle and a target downtilt angle of the antenna based on a target sub-coverage area and a center line of a main lobe of the antenna;

[0190] A first adjustment module 13, connected to the determination module 12, is configured to adjust the antenna to an initial target position according to a target direction angle and a target downtilt angle of the antenna;

[0191] The second adjustment module 14 is connected to the first adjustment module 13, and is configured to adjust the roll angle of the antenna, and rotate the antenna at the target initial position about the center line of the antenna main lobe to reduce the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

[0192] In some embodiments, the acquisition module 11 is further used to determine the line length of the line scene according to the base station coverage distance;

[0193] According to the line length, the line scene is divided into multiple adjacent and non-overlapping sub-coverage areas;

[0194] According to the location of the base station where the antenna is located, the target sub-coverage area on the line scene corresponding to the antenna is obtained.

[0195] In some embodiments, two endpoints of the target sub-coverage area on the line scene are respectively a first endpoint and a second endpoint.

[0196] The determination module 12 is also used to determine the first angle formed between the first endpoint, the second endpoint and the antenna of the target sub-coverage area according to the first endpoint, the second endpoint and the center line of the antenna main lobe; determine the coverage center point of the target sub-coverage area pointed to by the center line of the antenna main lobe according to the intersection of the angular bisector of the first angle and the target sub-coverage area; and determine the target direction angle β and target downtilt angle α of the antenna that can maximize the energy radiated by the antenna and concentrate it in the target coverage area according to the line connecting the antenna and the coverage center point.

[0197] In some embodiments, the second adjustment module 14 is specifically used to adjust the roll angle of the antenna, and rotates the antenna at the initial target position about the center line of the antenna main lobe so that the horizontal main lobe projection direction is parallel to the tangent direction of the coverage center point, thereby obtaining a target roll angle, wherein the target roll angle can minimize the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

[0198] In some embodiments, the second adjustment module 14 is further configured to calculate the target roll angle of the antenna according to the following formula (1):

[0199]

[0200] Wherein, γ is the target roll angle after antenna adjustment, β is the target direction angle of the antenna, D is the horizontal distance between the antenna and the target sub-coverage area, and H is the vertical distance between the antenna and the target sub-coverage area.

[0201] In some embodiments, the apparatus further comprises:

[0202] The verification module is connected to the determination module and is configured to verify the wireless coverage of the target sub-coverage area by the antenna posture to determine the antenna posture that can meet the wireless coverage requirements of the target sub-coverage area. The verification module includes:

[0203] The first calculation unit is configured to calculate the length value of the horizontal main lobe projection according to the following formula (2):

[0204]

[0205] Where l is the length of the horizontal main lobe projection, θ H is the horizontal half-power angle of the antenna, H is the vertical distance between the antenna and the target sub-coverage area, and α is the target downtilt angle of the antenna;

[0206] A second calculation unit, connected to the first calculation unit, is configured to calculate the effective coverage rate of the antenna in the line scene according to the length value of the horizontal main lobe projection and the distance between the first endpoint and the second endpoint in the target sub-coverage area;

[0207] The verification unit is connected to the second calculation unit and is configured to verify whether the antenna posture complies with the wireless coverage of the target sub-coverage area according to the effective coverage rate of the antenna in the online scene, so as to determine the optimal antenna posture that can meet the wireless coverage requirements of the target sub-coverage area.

[0208] In some embodiments, the verification unit is also used to determine whether the effective coverage rate of the antenna in the line scene is greater than or equal to the effective coverage rate threshold; if the judgment result is yes, the determined antenna posture is the antenna posture that meets the wireless coverage requirements of the target sub-coverage area; if the judgment result is no, the division method of the sub-coverage area in the line scene is adjusted to generate a new target sub-coverage area, and steps S1 to S4 are repeated to adjust the antenna posture corresponding to the new target sub-coverage area again until the antenna posture can meet the wireless coverage requirements of the new target sub-coverage area.

[0209] It should be noted that this embodiment is a corresponding device of the antenna attitude planning method for line scene wireless coverage in the above-mentioned embodiment 1. The method in embodiment 1 can be implemented by adopting this device. The specific implementation method can refer to the description in the above-mentioned embodiment 1, and this embodiment will not be repeated here.

[0210] Figure 7 Another structural schematic diagram of an antenna attitude planning device for wireless coverage of a line scene provided by this application is as follows Figure 7 As shown, the present application provides an antenna attitude planning device for linear scene wireless coverage, including a memory 41 and a processor 42, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the antenna attitude planning method for linear scene wireless coverage in the above-mentioned embodiments of the present application.

[0211] The memory is connected to the processor, the memory may be a flash memory or a read-only memory or other memory, and the processor may be a central processing unit or a single-chip microcomputer.

[0212] In some embodiments, the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the antenna attitude planning method for line scene wireless coverage in the above-mentioned embodiments of the present application is implemented.

[0213] The computer-readable storage medium includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, computer program modules or other data). Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable read only memory), flash memory or other memory technology, CD-ROM (Compact Disc Read-Only Memory), digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer.

[0214] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present application, but the present application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of the present application, and these modifications and improvements are also considered to be within the scope of protection of the present application.

Claims

1. An antenna attitude planning method for wireless coverage of a linear scene, characterized in that: The method comprises: S1. Obtain the target sub-coverage area on the line scene corresponding to the antenna; S2. Determine the target direction angle and target downtilt angle of the antenna based on the target sub-coverage area and the centerline of the antenna main lobe; S3. Adjust the antenna to the initial target position according to the target direction angle and target downtilt angle of the antenna; S4. Adjust the roll angle of the antenna and rotate the antenna at the initial target position about the center line of the antenna main lobe to reduce the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

2. The antenna attitude planning method for line scene wireless coverage according to claim 1 is characterized in that: Step S1 specifically includes: Determine the line length of the line scene according to the base station coverage distance; According to the line length, the line scene is divided into multiple adjacent and non-overlapping sub-coverage areas; According to the location of the base station where the antenna is located, the target sub-coverage area on the line scene corresponding to the antenna is obtained.

3. The antenna attitude planning method for line scene wireless coverage according to claim 2 is characterized in that: The two endpoints of the target sub-coverage area on the line scene are respectively a first endpoint and a second endpoint. Step S2 specifically includes: S21. Determine a first angle formed between the first endpoint, the second endpoint and the antenna in the target sub-coverage area according to the first endpoint, the second endpoint and the center line of the antenna main lobe; S22. Determine the coverage center point of the target sub-coverage area pointed to by the center line of the antenna main lobe according to the intersection of the angle bisector of the first angle and the target sub-coverage area; S23. According to the line connecting the antenna and the coverage center point, determine the target direction angle β and target downtilt angle α of the antenna that can maximize the energy radiated by the antenna and concentrate it in the target coverage area.

4. The antenna attitude planning method for line scene wireless coverage according to any one of claim 1, characterized in that: Step S4 specifically includes: Adjust the roll angle of the antenna, rotate the antenna at the initial target position around the center line of the antenna main lobe so that the horizontal main lobe projection direction is parallel to the tangent direction of the coverage center point, and obtain the target roll angle, which can minimize the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

5. The antenna attitude planning method for line scene wireless coverage according to any one of claims 1 to 4, characterized in that: Step S4 specifically includes: According to the following formula (1), the target roll angle of the antenna is calculated: Wherein, γ is the target roll angle after antenna adjustment, β is the target direction angle of the antenna, D is the horizontal distance between the antenna and the target sub-coverage area, and H is the vertical distance between the antenna and the target sub-coverage area.

6. The antenna attitude planning method for line scene wireless coverage according to claim 2 is characterized in that: After step S4, the method further comprises: S5. Verify the wireless coverage of the target sub-coverage area by the antenna posture to determine the antenna posture that can meet the wireless coverage requirements of the target sub-coverage area, specifically including: S51. Calculate the length of the horizontal main lobe projection according to the following formula (2): Where l is the length of the horizontal main lobe projection, θ H is the horizontal half-power angle of the antenna, H is the vertical distance between the antenna and the target sub-coverage area, and α is the target downtilt angle of the antenna; S52. Calculate the effective coverage of the antenna in the line scene according to the length value of the horizontal main lobe projection and the distance between the first endpoint and the second endpoint in the target sub-coverage area; S53. Verify whether the antenna posture complies with the wireless coverage requirements of the target sub-coverage area according to the effective coverage rate of the antenna in the online scene, so as to determine the optimal antenna posture that can meet the wireless coverage requirements of the target sub-coverage area.

7. The antenna attitude planning method for line scene wireless coverage according to claim 6 is characterized in that: Step S53 specifically includes: S531. Determine whether the effective coverage of the antenna in the line scene is greater than or equal to the effective coverage threshold; S532. If yes, the determined antenna posture is the antenna posture that meets the wireless coverage requirements of the target sub-coverage area; If not, adjust the division method of the sub-coverage area in the line scene to generate a new target sub-coverage area, and repeat steps S1 to S4 to adjust the antenna posture corresponding to the new target sub-coverage area again until the antenna posture can meet the wireless coverage requirements of the new target sub-coverage area.

8. An antenna attitude planning device for wireless coverage of a linear scene, characterized in that: The device comprises: An acquisition module, which is configured to acquire a target sub-coverage area on a line scene corresponding to an antenna; A determination module, connected to the acquisition module, configured to determine a target direction angle and a target downtilt angle of the antenna based on a target sub-coverage area and a centerline of a main lobe of the antenna; A first adjustment module, connected to the determination module, configured to adjust the antenna to an initial target position according to a target direction angle and a target downtilt angle of the antenna; The second adjustment module is connected to the first adjustment module and is configured to adjust the roll angle of the antenna, rotating the antenna at the target initial position about the center line of the antenna main lobe to reduce the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

9. The antenna attitude planning device for line scene wireless coverage according to claim 8, characterized in that: The second adjustment module is specifically used to adjust the roll angle of the antenna. The antenna at the initial target position is rotated around the center line of the antenna main lobe so that the horizontal main lobe projection direction is parallel to the tangent direction of the coverage center point, thereby obtaining a target roll angle. The target roll angle can minimize the angle between the horizontal main lobe projection direction and the tangent direction of the coverage center point.

10. The antenna attitude planning device for line scene wireless coverage according to claim 8, characterized in that: The second adjustment module is also used to calculate the target roll angle of the antenna according to the following formula (1): Wherein, γ is the target roll angle after antenna adjustment, β is the target direction angle of the antenna, D is the horizontal distance between the antenna and the target sub-coverage area, and H is the vertical distance between the antenna and the target sub-coverage area.

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