Multi-cell united coverage optimizing method and device of cellular mobile communication network
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A cellular mobile communication and coverage optimization technology, applied in wireless communication, network planning, electrical components, etc., can solve problems such as growth and large amount of computation
Inactive Publication Date: 2013-12-25
ZHEJIANG UNIV +1
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However, the former method involves the boundary division of multiple cells and the iterative solution of the antenna excitation weight vector, while the latter method traverses the possible transmit power, excitation current amplitude and phase of multi-cell antennas to find the optimal solution, which requires a large amount of computation and is random Exponential growth with the number of cells
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Embodiment 1
[0056] Such as figure 1 As shown, a method for optimizing joint coverage of multiple cells in a cellular mobile communication network in Embodiment 1 includes the following steps:
[0057] (1) For any sub-service area in the cellular mobile communication network, collect the location information of each base station in the sub-service area; figure 2 As shown, the sub-service area consists of three adjacent and opposite 120° cells A 1 ~A 3 Composition, the base stations of the three cells are respectively denoted as B 1 ~B 3 , the antennas of the three base stations are denoted as C 1 ~C 3 ;
[0058] The adjacency mentioned means that the three cells are close to each other geographically. The relative means that the main beams of the base station antennas of the three cells are directed to the same area.
[0059] (2) Rasterize the sub-service area, and record the total number of grids in the sub-service area, the position coordinates of the vertices and center points ...
Embodiment 2
[0116] The coverage optimization method of this embodiment can also be used to correct the bad coverage of a single cell separately, including the following steps:
[0117] (1) Use the cell and the other two neighboring cells to form a sub-service area, and collect information such as the base station location and antenna parameters of the sub-service area;
[0118] (2) Carry out grid division for the sub-service area to obtain the total number of grids, the vertexes of each grid and the position coordinates of the center point;
[0119] (3) Obtain the propagation loss from each base station antenna to each grid center point; the propagation loss can be measured in the actual network, or calculated by the propagation loss model;
[0120] (4) According to the propagation loss, establish a mathematical model with the weak coverage area ratio as the minimization target and the over coverage area ratio as the constraint condition;
[0121] (5) Solve the mathematical model to obta...
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Abstract
The invention discloses a multi-cell united coverage optimizing method of a cellular mobile communication network. The method comprises the following steps: (1) collecting positions of base stations and antenna parameter information at a sub-service area; (2) recording position coordinates of a peak and a central point of each grid after the sub-service area is rasterized; (3) determining wireless signal propagation loss from each grid central point to each base station antenna; (4) establishing a mathematic model using a weak coverage area ratio as a minimizing target and using an excessive coverage area ratio as a constraint condition; and (5) solving the mathematic model, and applying an excitation current onto an array element in the base station antenna according to the obtained base station array element excitation current vector. The invention further discloses a coverage optimizing device for realizing the method. The device comprises a control unit, wherein the control unit comprises a rasterization processing module, an information storage module, a propagation loss determination module, an optimization solving module and an excitation module. The weak coverage area is minimized while the excessive coverage area is eliminated.
Description
technical field [0001] The invention relates to the field of cellular mobile communication, in particular to a multi-cell joint coverage optimization method and device for a cellular mobile communication network. Background technique [0002] The goal of cellular mobile communication network coverage optimization is to optimize the coverage of public control signals (pilot, synchronization, etc.) of each cell to achieve seamless coverage of public control signals in the network and low mutual interference between cells. Due to factors such as base station site selection restrictions, obstacles, and changes in topography (radio signal propagation conditions), the actual coverage area of a cell often does not match the planned coverage area, which is manifested in poor coverage, including weak coverage and over-coverage. In the weak coverage area, the received common control signal power of each base station is lower than the specified decision threshold Therefore, communi...
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