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A three-dimensional coverage control method for public control signals in a cellular mobile communication network
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A technology of cellular mobile communication and public control signal, applied in the field of stereo coverage control of public control signal of cellular mobile communication network, can solve the problems of weak coverage, inapplicable weak coverage elimination and inter-cell interference suppression, and difficulty in achieving coverage effect, etc. Achieve the effect of low computational complexity
Active Publication Date: 2017-11-24
ZHEJIANG UNIV
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Problems solved by technology
[0006] (1) adjust the transmission power and / or pitch angle of the base station antenna or antenna array, so that the actual coverage area of the cell can be expanded or reduced simultaneously in all directions (for details, please refer to the Chinese patent whose publication number is CN 102202330A), it is difficult to achieve the ideal overlay effect
[0007] (2) Jointly adjust the pitch and azimuth angles of the antennas or antenna arrays of multiple adjacent cells, or jointly adjust the transmit power of the base station antennas of multiple adjacent cells, so that there is a suitable overlap coverage between the cells as much as possible, but only The actual coverage distance in all directions of the cell expands or decreases at the same time, and it is impossible to reasonably divide the coverage area between cells according to the actual landform
[0008] (3) According to the actual propagation conditions in each direction and the target coverage distance, use an array antenna with beamforming capability on the azimuth plane to control the actual coverage of a single cell by adjusting the antenna pattern (that is, the radiation intensity in each direction on the azimuth plane). Coverage (for details, please refer to the Chinese patent with publication number CN 101304278A), but it often brings over-coverage to adjacent cells while improving the weak coverage of this cell
[0010] All of the above methods are proposed for ground coverage requirements, and are not suitable for weak coverage elimination and inter-cell interference suppression under three-dimensional coverage targets
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Embodiment 1
[0094] The above-mentioned three-dimensional coverage control method is applied to the three-dimensional coverage control of a sector, and its implementation process is as follows image 3 shown, including the following steps:
[0095] S101, acquiring a set of test points and a set of interference constraint points;
[0096] The target coverage area of a sector (including the ground coverage area and the coverage area above the ground) is divided into three-dimensional grids, and the coordinates of each three-dimensional grid center point are recorded, and all three-dimensional grid center points form a test point set S.
[0097] The virtual boundary wall of the sector is divided into plane grids, the coordinates of the center points of each plane grid are recorded, and all the center points of the plane grids form a set K of interference constraint points.
[0098] The virtual boundary wall is at the boundary between the target sector and its two frontal neighbors, and is pe...
Embodiment 2
[0109] According to the above three-dimensional coverage control method, all sectors are applied one by one to realize the three-dimensional coverage control of the whole network. The implementation process is as follows: Figure 4 shown, including the following steps:
[0110] S201, target sector selection;
[0111] In the whole network, select a sector that has not been subjected to stereo coverage control as the target sector;
[0113] Steps S101 to S105 in Embodiment 1 are used to perform stereo coverage control on the selected target sector;
[0114] S203, discriminate, repeat or exit;
[0115] It is judged whether each sector has performed the stereo coverage control; if not, return to step S201; otherwise, the stereo coverage control of the entire network has been completed, and the algorithm ends.
[0116] The invention utilizes the degree of freedom of the pattern of the area array antenna to solve the appropri...
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Abstract
The invention provides a cellular mobile communication network public control signal three-dimensional covering method which includes acquiring a section test point set and an interference restrained point set; acquiring a wirelesssignal transmission path loss set; constructing a wireless manifold vector set; conducting section three-dimensional covering optimization modeling; solving an excitation weight matrix; implementing excitation current feed and covering control. The method achieves section three-dimensional covering control facing actual propagation environment and the target covering distance by optimizing the directional diagram of an area array antenna, namely restrains weak covering rate and the interference degree, minimizes the base station antenna transmission power, and achieves the aim of restraining covering cavity and inter-section interference, saving energy and protecting environment. The method can be used for three-dimensional covering control facing single section and can also be used for three-dimensional covering control of the whole network.
Description
technical field [0001] The invention belongs to the technical field of cellular mobile network communication, and in particular relates to a three-dimensional coverage control method for a common control signal of a cellular mobile communication network. Background technique [0002] With the advancement of urbanization and the development of three-dimensional transportation, viaducts, overpasses, and high-rise buildings have increased rapidly. According to data from Emporis, a global building survey agency, the annual growth rate of high-rise buildings in China exceeds 20%, the average building height in metropolises continues to rise, and cities are expanding into complex three-dimensional airspaces. The emergence of three-dimensional high-rise buildings has promoted the exponential growth of the number of wireless communication services and the three-dimensional distribution in three-dimensional space. Only by realizing the three-dimensional seamless coverage of public c...
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