Method and system for inspecting cell identical and adjacent frequency interference
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A co-adjacent frequency interference and cell technology, which is applied in the field of checking the same-adjacent frequency interference in the cell, can solve problems such as occlusion, error, and co-adjacent frequency interference
Inactive Publication Date: 2010-11-24
BEIJING UNIV OF POSTS & TELECOMM
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However, during network measurement, it is inevitable to encounter various problems, such as insufficient sampling points, obstructions, base station failures, and other accidental factors. These problems directly affect the comprehensiveness and accuracy of measurement data, making It is difficult for measurement data to truly and accurately reflect the network situation. Therefore, only using measurement data to evaluate interference often has certain errors, so that there are some co-adjacent frequency phenomena that do not meet the requirements in the frequency allocation results, forming co-adjacent frequency interference and affecting system performance.
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[0101] A preferred embodiment of the present invention is as follows.
[0102] Step S221, find out the cells within three floors away from the source cell and put them into the verification scope set of the source cell.
[0103] In a further preferred solution, after the step S221, the following steps are further included.
[0104] Step S222, for cells within the set of verification ranges that are separated from the source cell by more than one level, calculate whether the cell is in the forward direction of the source cell, and if not, remove the cell from the set of verification ranges.
[0105] Calculate the angle between the line direction from the source cell to the target cell and the azimuth direction of the source cell. If the angle is less than 60°, it is positive.
[0106] Step S223, for the outermost cell in the verification range set, calculate whether the cell is outside the layer, if yes, remove the cell from the verification range set; the outermost layer is t...
specific Embodiment
[0133] Specific examples are as follows.
[0134] Establish the interference evaluation vector of the frequency point in the specified cell as (β1, β2, β3, β4, β5, β6), and this vector is the frequency point interference check result of the frequency point in the cell. The degree of interference increases with the increase of β1, the increase of β2, the decrease of β3, the increase of β4, the decrease of β5 and the decrease of β6 in the vector.
[0135] Interference degree comparison rules: compare the interference evaluation vectors in the order of β1 to β6, first compare β1, the larger β1 is, the greater the interference is, and then compare β2 when β1 is the same, and so on.
[0136] Other comparison methods may also be used, for example, after normalizing the elements in the vector, weighted summation is performed, and comparison is made based on the result and the degree of interference to the frequency points.
[0137] For the interference evaluation of the combination ...
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Abstract
The invention relates to a method and a system for inspecting cell identical and adjacent frequency interference, wherein the method comprises the following steps: 1, inputting the data information of network to be inspected, wherein the data information comprises the position information of a base station, azimuthal angle data, relation of cell adjacent areas and assignment data of cell frequency points; 2, determining the hierarchical relationship of the cells, the inspection range of the cells and the counterblow relation of the azimuthal angle between the cells according to the data information; 3, classifying the various interferences according to the relation of the cell adjacent areas and the hierarchical relationship among the cells; and 4, as for each cell, searching the interference sources of the frequency points of the cell in the inspection range of the cell according to the assignment data of the cell frequency points; determining the grade which the various interference sources belong to; and as for each cell frequency point, utilizing an interference inspection model to generate an interference inspection result corresponding to the frequency point according to the grade of the interference source and the hierarchical relationship between the interference source and the cell. The invention can carry out inspection on the network to find out the cell frequency points in which identical and adjacent channel interference possibly exists.
Description
technical field [0001] The invention relates to the field of mobile communication, in particular to a method and system for checking same-adjacent frequency interference in a cell. Background technique [0002] Frequency planning and optimization is an important part of mobile communication network construction and optimization. In the GSM (Global System for Mobile Communication, Global System for Mobile Communications) network, each cell needs to be allocated a BCCH channel (Broadcast Control CHannel, broadcast control channel) and multiple TCH channels (Traffic CHannel, traffic channel), and each channel needs Occupy a certain frequency resource. As the number of mobile users grows, the network scale continues to expand, requiring more frequency resources, which are limited. Therefore, it is very important to allocate frequencies reasonably and improve spectrum utilization. The cellular system allows the multiplexing of the same frequency or adjacent frequencies in cells...
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