CN109982246B - Method, device and medium for adjusting power of cellular cell - Google Patents
Method, device and medium for adjusting power of cellular cell Download PDFInfo
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- CN109982246B CN109982246B CN201711447183.1A CN201711447183A CN109982246B CN 109982246 B CN109982246 B CN 109982246B CN 201711447183 A CN201711447183 A CN 201711447183A CN 109982246 B CN109982246 B CN 109982246B
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- H04W24/02—Arrangements for optimising operational condition
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- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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Abstract
The embodiment of the invention provides a method, a device and a medium for adjusting the power of a cell, which are used for solving the problem that the time for adjusting the power of each cell in a traversal mode is long. The method comprises the following steps: determining a cell to be adjusted of the antenna power to be adjusted; determining the antenna coverage area of each cell to be adjusted according to the electronic map; dividing cells to be adjusted into N groups, wherein the antenna coverage areas of the cells to be adjusted included in each group in the N groups are not overlapped, each group in the N groups corresponds to the adjustment sequence of the antenna power, and N is a positive integer; and adjusting the antenna power of the cells to be adjusted included in each group according to the adjusting sequence, and adjusting the antenna power of the cells to be adjusted included in the same group in parallel.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a medium for adjusting cell power.
Background
At present, when the power of all cells in an area is uniformly adjusted, the power of all cells in the area can be adjusted in batch, so that the signal coverage of cell antennas is improved.
Since the signal coverage of other cells may be affected when the power of a certain cell is adjusted, the traversal method is adopted when each cell to be adjusted in a certain area is adjusted, and the traversal method is only suitable for power adjustment of thousands of levels of cells.
Because the size of the cellular cell in the network is huge, tens of thousands or hundreds of thousands of cells in the target area to be adjusted may need to be subjected to power adjustment calculation. Therefore, the time for adjusting the power of each cell in a traversal manner is long, and the adjustment may not be completed within several days, thereby affecting the signal coverage of the cell antenna.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a medium for adjusting the power of a cell, which are used for solving the problem that the time for adjusting the power of each cell in a traversal mode is long.
In a first aspect, an embodiment of the present invention provides a method for adjusting cell power, including:
determining a cell to be adjusted of the antenna power to be adjusted;
determining the antenna coverage area of each cell to be adjusted according to the electronic map;
dividing cells to be adjusted into N groups, wherein the antenna coverage areas of the cells to be adjusted included in each group in the N groups are not overlapped, each group in the N groups corresponds to the adjustment sequence of the antenna power, and N is a positive integer;
and adjusting the antenna power of the cells to be adjusted included in each group according to the adjusting sequence, and adjusting the antenna power of the cells to be adjusted included in the same group in parallel.
Optionally, the cell to be adjusted is a cell included in a target area of the antenna power to be adjusted, or a cell included in an area where the target area is expanded by a first preset range.
Optionally, adjusting the antenna power of the cells to be adjusted included in each group includes:
adjusting antenna power for a first cell, wherein the first cell is any one of the cells to be adjusted:
adjusting the antenna power of the first cell based on the antenna power adjustment range, and evaluating the performance parameters of all cells included in the protection area;
when the performance parameter value of the first cell does not change in a direction representing that the antenna coverage performance becomes better, and the performance parameter value of any cell included in the estimated protection area does not change in a direction of antenna coverage performance degradation compared with the performance parameter value of any cell before the antenna power adjustment is performed on the first cell, stopping adjusting the antenna power of the first cell;
the protection area is an area obtained by removing the target area from an area obtained by expanding the target area by a second preset range, and the second preset range is larger than the first preset range.
Optionally, the performance parameter comprises at least one of: the method comprises the following steps of calculating the ratio of a weak coverage grid in an antenna coverage area of a cell to the number of grids included in the antenna coverage area of the cell, the average overlapping coverage of all grids included in the antenna coverage area of the cell, and the ratio of a cell boundary grid in the antenna coverage area of the cell to the grids included in the antenna coverage area of the cell.
Optionally, the adjustment order is obtained by sorting based on the number of measurement reports of the largest number of cells in the N groups, where the largest number of cells is a cell that receives the largest number of measurement reports in a preset time period.
In a second aspect, an embodiment of the present invention provides an apparatus for adjusting cell power, including:
a first determining unit, configured to determine a cell to be adjusted of the antenna power to be adjusted;
the second determining unit is used for determining the antenna coverage area of each cell to be adjusted according to the electronic map;
the device comprises a grouping unit, a power adjusting unit and a power adjusting unit, wherein the grouping unit is used for dividing cells to be adjusted into N groups, the antenna coverage areas of the cells to be adjusted in each group in the N groups are not overlapped, each group in the N groups corresponds to the adjustment sequence of antenna power, and N is a positive integer;
and the adjusting unit is used for adjusting the antenna power of the cells to be adjusted included in each group according to the adjusting sequence and adjusting the antenna power of the cells to be adjusted included in the same group in parallel.
Optionally, the cell to be adjusted is a cell included in a target area of the antenna power to be adjusted, or a cell included in an area where the target area is expanded by a first preset range.
Optionally, the adjusting unit is specifically configured to:
adjusting antenna power for a first cell, wherein the first cell is any one of the cells to be adjusted:
adjusting the antenna power of the first cell based on the antenna power adjustment range, and evaluating the performance parameters of all cells included in the protection area;
when the performance parameter value of the first cell does not change towards the direction representing that the antenna coverage performance becomes better, and the performance parameter value of any cell included in the estimated protection area changes towards the direction of antenna coverage performance deterioration compared with the performance parameter value of any cell before the antenna power adjustment is carried out on the first cell, the adjustment of the antenna power of the first cell is stopped;
the protection area is an area obtained by removing the target area from an area obtained by expanding the target area by a second preset range, and the second preset range is larger than the first preset range.
Optionally, the performance parameter comprises at least one of: the method comprises the following steps of calculating the ratio of a weak coverage grid in an antenna coverage area of a cell to the number of grids included in the antenna coverage area of the cell, the average overlapping coverage of all grids included in the antenna coverage area of the cell, and the ratio of a cell boundary grid in the antenna coverage area of the cell to the grids included in the antenna coverage area of the cell.
Optionally, the adjustment order is obtained by sorting based on the number of measurement reports of the largest number of cells in the N groups, where the largest number of cells is a cell that receives the largest number of measurement reports in a preset time period.
In a third aspect, a computing device is provided, comprising at least one processor and at least one memory, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the steps of any of the above methods.
In a fourth aspect, there is provided a computer readable medium storing a computer program executable by a computing device, the program, when run on the computing device, causing the computing device to perform the steps of any of the methods described above.
The embodiment of the invention can realize automatic power optimization of large-scale honeycomb cells in a large range by adjusting the power of each cell in the same group in parallel, and quickly output the calculation result aiming at the number of the honeycomb cells more than ten thousand. Meanwhile, the grouping method for the cell is also suitable for calculating other large-scale planning optimization schemes.
Drawings
Fig. 1 is a schematic diagram of rasterization of a three-dimensional space provided by an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for adjusting cell power according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a cell to be adjusted according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an antenna coverage area of a cell to be adjusted according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of a cell grouping process to be adjusted according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a cell to be adjusted according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating adjustment of cell power according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating a result of cell power adjustment performed in a certain target area according to an embodiment of the present invention;
fig. 9 is a result of antenna coverage performance change after power adjustment of a partial cell according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an apparatus for adjusting cell power according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a computing device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention can be applied to the mobile communication fields of 2G, 3G, 4G, 5G and the like.
The Terminal in the embodiment of the present invention may be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), an MTC (Machine Type Communication) Terminal, and the like.
The embodiment of the invention provides a method, a device and a medium for adjusting the power of a cell, which are used for solving the problem that the time for adjusting the power of each cell in a traversal mode is long. The method may be applied to a base station, a server, or other network devices, and the invention is not limited thereto.
Before executing the procedure of the cell power adjustment method provided by the embodiment of the present invention, the three-dimensional space region in the electronic map needs to be rasterized, for example, the space region may be divided into a × a grids, the dividing direction is parallel to the coordinate axis, and the size of a may be determined according to the requirement and the precision of the original three-dimensional map, and may be 1 meter (m), 5m, 20m, and so on. A grid is considered a building grid if its center point is within the polyhedron in which the building resides, otherwise it is considered a non-building grid.
In the embodiment of the present invention, it is preferable to perform rasterization on a three-dimensional space region, so that a three-dimensional position distribution of a region where a terminal is located can be obtained, but rasterization may also be performed only on a two-dimensional plane, which is not limited in the present invention.
Taking a building with a height of 35m and an area of 200m per floor as an example, if a is 5m, the building is divided into 7 floors by 5m floors, each floor is divided into 1600 planar grids of 5m, and then the building is divided into 11200 grids of 5m, as shown in fig. 1.
For each grid, the field strength of one or more antennas in the grid within the grid can be obtained by simulation calculations or field measurements. The MR data positioning result of each grid can be obtained based on a Measurement Report (MR) data positioning algorithm, and the specific positioning manner can be referred to in the prior art and is not described herein again. The MR data reported by each terminal includes information such as a serving Cell (a Cell to which the terminal is accessed), a measured field strength of the serving Cell, a frequency point of a neighboring Cell, a Physical Cell Identifier (PCI) of the neighboring Cell, a measured field strength of the neighboring Cell, and a measured Cell signal arrival angle.
It should be noted that, in the embodiment of the present invention, one antenna refers to a transmitting antenna of the same base station cell, that is, one antenna may be understood as one base station cell.
The MR data positioning result comprises the following information: master cells of each grid, field strengths of master cells of each grid, and the like. In a grid, the cell corresponding to the antenna with the highest field strength is called the master cell of the grid.
The weak coverage grid referred to in the embodiment of the present invention refers to a grid in which the field intensity of the master cell is smaller than a preset field intensity threshold. The overlapping coverage of the grid refers to the number of cells in which the difference between the field intensity of the cells included in the grid and the field intensity of the master cell is smaller than or equal to a preset threshold value. The cell edge grid is a cell edge grid if a certain grid is different from a master cell of at least one adjacent grid.
In addition, "a plurality" in the description of the present application means "two or more". In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor order.
The method for adjusting the cell power provided in the embodiment of the present invention may be executed by a base station, a server, a network management device, or a network optimization device, and the like, which is not limited in the present invention.
Referring to fig. 2, a flowchart of a method for adjusting cell power according to an embodiment of the present invention is shown, where the method includes the following steps:
s201, determining a cell to be adjusted of the antenna power to be adjusted.
Optionally, the cell to be adjusted is a cell included in a target area of the antenna power to be adjusted, or a cell included in an area where the target area is expanded by a first preset range.
S202, determining the antenna coverage area of each cell to be adjusted according to the electronic map.
S203, dividing the cells to be adjusted into N groups, wherein the antenna coverage areas of the cells to be adjusted included in each group in the N groups are not overlapped, and each group in the N groups corresponds to the adjustment sequence of the antenna power. N is a positive integer.
S204, adjusting the antenna power of the cells to be adjusted included in each group according to the adjusting sequence, and adjusting the antenna power of the cells to be adjusted included in the same group in parallel.
The following describes a method for adjusting the cell power in detail.
(1) A detailed description is given of the manner of determining the cell to be adjusted of the antenna power to be adjusted in step S201:
firstly, a target area of the antenna power to be adjusted is selected, the optimized target area can be a rectangle or any polygon, and can be framed by a user through a Geographic Information System (GIS) interface or selected by inputting latitude and longitude and a range. And then determining a cell to be adjusted according to the target area.
For example, as shown in FIG. 3: the central area a represents the target area. In the embodiment of the present invention, all cells that can be adjusted (that is, adjustment is allowed) in the target area may be used as the cells to be adjusted.
After the central area a is expanded outward by a first preset range (for example, 500 meters), the area B in fig. 3 is obtained. In the embodiment of the present invention, all adjustable cells in the central area a and the area B may also be used as cells to be adjusted.
Let each arrow (dot) in fig. 3 denote each cell, all cells indicated by solid arrows may be used as cells to be adjusted, and all cells indicated by solid arrows and dots may also be used as cells to be adjusted.
Preferably, in a case where the target area is relatively large (for example, 40 km × 40 km), all cells in the target area (the central area a) may be used as the cells to be adjusted.
In the embodiment of the invention, the area which is obtained by removing the target area from the whole range influenced by the cell to be adjusted can be used as the protection area. The protection area may be an area excluding the target area from an area in which the target area is expanded by a second preset range, where the second preset range is larger than the first preset range. See, for example, regions B and C shown in fig. 3 as protection regions. Subsequently, when the antenna power of the cell to be adjusted is adjusted, it is necessary to ensure that the signal coverage in the two areas in the protection area is not deteriorated.
(2) The manner of determining the antenna coverage area of each cell to be adjusted according to the electronic map in step S202 is described.
The antenna coverage area of each cell to be adjusted is also the area of influence of the cell. For example, the grid of the cell to be adjusted is a rectangle surrounded by 600 grids in each direction, i.e., the intersection of all the areas combined with the initially selected target area and the protection area. The determination manner of the grids included in the target area and the grids included in the protection area is still determined according to the initial area division manner described in (1), and is not based on the influence area of a certain cell to be adjusted, even if the influence area of the cell to be adjusted exceeds the target area. For example, as shown in fig. 4, the area a is a target area, the area D represents a protection area, all grids in the influence area of the cell a to be adjusted are included in the grids included in the target area, and all grids included in the influence area of the cell b to be adjusted are both the grids included in the target area and the grids included in the protection area.
(3) The detailed description will be made with respect to the step S203 of dividing the cells to be adjusted into N groups.
When grouping cells to be adjusted, it is necessary to ensure that the antenna coverage areas (i.e., the areas of influence) of the cells to be adjusted included in each group do not overlap, i.e., there cannot be a common grid. And each group in the N groups corresponds to the adjustment sequence of the antenna power.
Alternatively, the cells to be adjusted may be divided into N groups according to the number of received MRs for each cell to be adjusted. The adjustment sequence is obtained by sequencing the number of the measurement reports of the largest number of cells in the N groups, wherein the largest number of cells is the cell receiving the largest number of measurement reports in a preset time period.
For example, all cells to be adjusted determined according to the target area form a cell candidate set, as shown in fig. 5, the manner of dividing the cell candidate set into N groups includes the following steps:
s501, dividing the ith cell in the cell candidate set into the ith group, wherein the ith cell is the cell with the maximum MR number in the cell candidate set, and executing S502.
S502, dividing non-associated cells in the cell candidate set into an ith group, where the non-associated cells are cells whose antenna coverage areas do not overlap with the antenna coverage area of the ith cell (the cell with the largest number of MRs), and performing S503;
s503, deleting the ith cell and the non-associated cell in the cell candidate set, and executing S504.
S504, determine whether the cell candidate set is empty, if not, perform S505, and if so, perform S506.
In S505, i is executed as i +1, and S501 is executed.
And S506, finishing grouping.
For example, referring to fig. 6, the cell candidate set includes 4 cells to be adjusted, which are a, b, c, and d, respectively, the number of MRs of each cell to be adjusted is indicated in parentheses in fig. 6, and the box indicates the antenna coverage area of the cell to be adjusted.
In the first round, the number of MRs of the cell a to be adjusted is the largest, the cell a to be adjusted is divided into a first group, then the antenna coverage areas of the cell b to be adjusted and the cell c to be adjusted are intersected with the antenna coverage area of the cell a to be adjusted, the antenna coverage area of the cell d to be adjusted is not intersected with the antenna coverage area of the cell a to be adjusted, and the cell d is also divided into the first group. And deleting the cell a to be adjusted and the cell d to be adjusted from the cell candidate set.
In the second round, the cell b to be adjusted with the largest number of MRs in the cell candidate set is selected to be divided into a second group, and the antenna coverage area of the cell c to be adjusted intersects with the antenna coverage area of the cell b. Cell b is removed from the cell candidate set.
In the third round, the cell c to be adjusted in the cell candidate set is selected and put into the third group, and the cell c to be adjusted is deleted from the cell candidate set.
After the three rounds are finished, the cell candidate set is empty, the grouping is finished, and the final grouping result is as follows: a first group: cell a, cell d; second group: a cell b; third group: and (c) a cell.
(4) The following describes in detail how to S204 adjust the antenna power of the cells to be adjusted included in each group according to the adjustment sequence, and adjust the antenna power of the cells to be adjusted included in the same group in parallel.
When the antenna power of a plurality of cells to be adjusted included in each group is adjusted, the adjustment can be realized by the following steps:
a1, adjusting the antenna power of a first cell, wherein the first cell is any cell in the plurality of cells to be adjusted.
A2, adjusting the antenna power of the first cell based on the antenna power adjustment range, and evaluating the performance parameters of all cells included in the protection area.
A3, when the performance parameter value of the first cell no longer changes to the direction representing that the antenna coverage performance becomes better, and the performance parameter value of any cell included in the estimated protection area changes to the direction of the antenna coverage performance deterioration compared with the performance parameter value of any cell before the antenna power adjustment is performed on the first cell, stopping adjusting the antenna power of the first cell.
The protection area is an area obtained by removing the target area from an area obtained by expanding the target area by a second preset range, and the second preset range is larger than the first preset range.
If the performance parameter value is increased to represent that the antenna coverage performance is better, the performance parameter value of the first cell does not change towards the direction of representing that the antenna coverage performance is better, namely the performance parameter value is not increased any more; evaluating a change of the performance parameter value of any cell included in the protection area to a direction in which the antenna coverage performance is deteriorated compared to the performance parameter value of any cell before the antenna power adjustment is performed for the first cell means that the performance parameter value of any cell included in the protection area is evaluated not to be reduced compared to the performance parameter value of any cell before the antenna power adjustment is performed for the first cell. If the performance parameter value is reduced and the coverage performance of the representation antenna is improved, the performance parameter value of the first cell does not change towards the direction of representing the coverage performance of the antenna to be improved any more, namely the performance parameter value is not reduced any more; evaluating that the performance parameter value of any cell included in the protection region changes toward a direction in which the antenna coverage performance deteriorates compared to the performance parameter value of any cell before the antenna power adjustment is performed for the first cell means that the performance parameter value of any cell included in the protection region does not increase compared to the performance parameter value of any cell before the antenna power adjustment is performed for the first cell.
Wherein the performance parameter may comprise at least one of: the method comprises the following steps of calculating the ratio of a weak coverage grid in an antenna coverage area of a cell to the number of grids included in the antenna coverage area of the cell, the average overlapping coverage of all grids included in the antenna coverage area of the cell, and the ratio of a cell boundary grid in the antenna coverage area of the cell to the grids included in the antenna coverage area of the cell. The embodiment of the present invention does not limit the above 3 parameters. For example, the performance parameters may further include a traffic weak coverage rate, an area-mode-three-interference MR ratio, a grid outdoor-mode-three-interference MR ratio, a ratio of an uplink power margin smaller than 0, and the like.
The weak coverage rate of the telephone traffic refers to the ratio of the number of weak coverage MRs in the coverage area of the antenna of the cell to the total number of the MRs, and the weak coverage MR refers to the MR with the main control field intensity smaller than a given threshold;
the MR ratio of the area mode three interference is the ratio of the number of MRs with the mode three interference in the coverage area of the antenna of the cell to the total number of the MRs;
the MR ratio of the outdoor-grid three-mode interference in the grid is the ratio of the number of MRs with three-mode interference to the total number of MRs in the MR positioned in the outdoor grid in the antenna coverage area of the cell.
Optionally, when the antenna power of the first cell is adjusted based on the antenna power adjustment range, and the performance parameters of all cells included in the protection area are evaluated, the adjustment problem may be converted into a function problem. The performance parameter may be represented by an optimization objective function as follows.
In addition, x ═ p1,…,pN) The decision variable, i.e. the adjusted power of the cell to be adjusted, is represented. p is a radical ofiTo be adjusted byThe power of the whole cell i to be adjusted.
M is the total number of grids of the antenna coverage area of the cell.
Mweak(x) Comprises the following steps: under the condition that the value of the decision variable is x, the number of weak coverage grids of the antenna coverage area of the cell to be adjusted is determined;
Mbound(x) Comprises the following steps: under the condition that the value of the decision variable is x, the cell boundary grid number of the antenna coverage area of the cell to be adjusted can represent the continuity of the cell antenna coverage and is related to the cell switching times of the terminal.
Optionally, in this embodiment of the present invention, the performance parameter value of any cell included in the estimated protection area is not reduced compared to the performance parameter value of any cell before the antenna power adjustment is performed on the first cell, and may be converted into a constraint condition, where the constraint condition may be expressed as:
fk′(x)≤fk′(x0) K1, 2,. K; the constraint condition indicates that after adjustment, the statistical calculation results of all the objective functions in the protection area are not degraded, and K indicates the number of cells included in the protection area.
X belongs to X, X represents the value range of feasible solutions of the decision variables, namely the antenna power adjustment range, and the antenna power adjustment ranges of different cells to be adjusted can be different. For example, the minimum interval for power adjustment may be 0.1dB for a particular adjustment.
When the antenna power of a plurality of cells to be adjusted included in each group is adjusted, the adjustment can be converted into an optimization solving algorithm for determining an optimization model based on the function
Determining an optimization model based on the above function may be implemented as follows:
first, a multi-objective problem can be converted into a single-objective problem:
the specific mode is that all objective functions are weighted and summed to obtain the objective function
Wherein the weight wiThe choice of (c) is determined by the actual adjustment requirements. Take the aforementioned 3 optimization objective functions as an example: if the optimization goal is to mainly reduce the overlap coverage, then we can let w1＝0.1，w2＝1，w30.1; if the optimization aims at simultaneously considering the reduction of weak coverage and the reduction of overlapping coverage, and does not consider the coverage continuity, let w be1＝1，w2＝1，w3＝0。
Second, the belt-constrained problem can be translated into an unconstrained problem:
for constraint fk′(x)≤fk′(x0) K is 1,2, …, K, and this constraint can be put into the objective function by a penalty function method, resulting in:
where P is a penalty factor, a larger number may be taken for actual calculation.
Since both the weak coverage and the boundary grid scale are numbers less than 1 and the average overlap coverage is typically a number less than 10, other possible optimization objective functions, in addition to the three above-mentioned optimization objective functions, can be given a corresponding reduction by dividing by a certain number. Thus the weights selected in the weighted sum may specify a smaller value, such as below 10 or 1, so that a value of P that is relatively larger than the weight value, such as 104 or 105, may cause the penalty function to function. The values of the weight and the penalty factor in the embodiment of the present invention are only used as an example, and may be determined according to needs in practice, and are not specifically limited herein.
Taking w as an example of the three optimization objective functions mentioned above1＝w2＝w 31, P105, then:
the model optimization determination is completed in the above manner. So that the power of the cells to be adjusted included in each group can be adjusted by the above-mentioned optimization model. For example, the power of the cells to be adjusted included in each group may be adjusted from a first group (certainly, the power may be adjusted from other groups, which is not limited in the present invention), and since there is no intersection between the influence areas of any two cells to be adjusted in the same group, all the cells to be adjusted in the same group may be adjusted in parallel, and the solution flow algorithms of each cell to be adjusted are consistent, as shown in fig. 7, the specific flow may include the following steps:
s701, calculating an initial value of the objective function.
The objective function F (x), where the decision variable x is x0The time value is the value of the function F (x) when the antenna transmission power of all cells to be adjusted takes the current value before adjustment. Specifically, before the first group of cells is adjusted, the value is the transmission power value of the current network of all the cells to be adjusted.
Take 3 adjustment cells for example, with 3 power values. Before adjustment, the initial values of the transmission power of the cell 1, the cell 2 and the cell 3 are respectively p1＝12.2，p2＝15.2，p3＝9.2。
Let the selected optimization objective function be the aforementioned three optimization objective functions,
and
and w1＝w2＝w3＝1，P＝105。
For example, when the antenna power for cell 1 is adjusted, the initial power is p112.2. For the area of influence of cell 1, initially, f1(x)＝0.2，f2(x)＝6.5，f3(x) 0.35. At the same time, for the initial value, f1 ′(x)-f1′(x0)、f2′(x)-f2′(x0) And f3′(x)-f3′(x0) Are all equal to 0. Thus, the initial value F (x) of the function F (x)0)＝F(12.2,15.2,9.2)＝0.2+6.5+0.35＝7.05。
S702, determining a bidirectional adjustment profit value of the power p of the current cell to be adjusted.
Taking the example mentioned in step 1 as an example, when the antenna power of the cell 1 is adjusted, the minimum adjustment amplitude of the power p is set to be 0.1 dB. For p1The minimum adjustment amplitude is increased and decreased, respectively. But if the power value exceeds the antenna power adjusting range after the power is increased or decreased by the minimum adjusting amplitude, no adjustment is carried out. After the adjustment, a new F (x) is calculated, and a total of 2 values of F (x) are obtained, which are the values of the objective function F (x) after the power is increased by 0.1 and the power is decreased by 0.1.
For example: p is a radical of1For p 12.21After increasing the minimum adjustment amplitude, p is calculated112.3, if the antenna power adjustment range is exceeded, the adjustment direction of the power value is not considered; otherwise, the value of the adjusted (power increased) objective function F (x) is calculated. Let p1If the minimum adjustment amplitude is increased or decreased within the antenna power adjustment range, calculation is required: values for F (12.3,15.2,9.2) and F (12.1,15.2, 9.2). For example for p1The calculated objective function values were 6.9 and 168.5, respectively, after increasing and decreasing their minimum adjustment magnitudes, respectively. Wherein, after reducing the minimum adjusting amplitude, a great deal is obtainedThe number of (2) is due to the increase of the objective function value of the protection zone, so that under the action of the penalty factor, a large number is obtained.
Since it indicates that the antenna coverage performance of the cell is deteriorated when F (x) is increased, for the gain after power adjustment, if the power adjustment is out of the antenna power adjustment range or the value of the function F (x) is increased, the gain is 0; otherwise the benefit is equal to the value of F (x) before adjustment minus the value of F (x) after adjustment. Thus, for the above adjustment results, the gain values for the increase and decrease in the transmit power of cell 1 by 0.1db are 0.15 and 0, respectively.
S703, determining whether an adjustment direction with the gain not being 0 is included, if so, executing S704, otherwise, ending the process.
In step S704, the adjustment direction with the gain not equal to 0 is set as the adjustment direction.
For the above benefit calculation results, the benefit is the largest in the power increase direction of cell 1.
S705, adjusting the power according to the adjustment direction and the step length, and determining whether the adjusted power exceeds the antenna power adjustment range, if so, ending the process, otherwise, executing step S706.
And S706, determining whether the profit value is increased compared with the profit value adjusted last time, if so, executing S705, and if not, ending the process.
And for the adjustment direction selected in step S704, continuously adjusting according to the adjustment direction by using the minimum adjustment range as a step length until the gain is not increased or the adjusted parameter exceeds the antenna power adjustment range. After the adjustment is completed, the selected parameter is updated to the final adjusted value, and the gains in both the increasing direction and the decreasing direction of the power can be updated to 0.
In the above example, the most profitable is p1Is p in Table 1 as an example1The value of F (x) after each 0.1dB increase, initially is p1The value of (A) was 12.2.
TABLE 1
| p1 | 12.2 | 12.3 | 12.4 | 12.5 | 12.6 | 12.7 |
| F(x) | 7.05 | 6.9 | 6.79 | 6.75 | 6.73 | 6.74 |
As can be seen from Table 1, when p is1After increasing from 12.6 to 12.7, the value of the function F (x) increases, i.e. the gain does not increase. Thus parameter p1The adjustment is made to 12.6 and no further adjustment is made. If p is1The maximum power value specified in the antenna power adjustment range is 12.5dBm, and since 12.6dBm is outside the antenna power adjustment range (maximum power limit per cell), p is1The adjustment to 12.5dBm is not continued.
At this time, the parameter p1And updating to the final adjustment value. Cell 1 power adjustment is complete.
The antenna power of all the cells to be adjusted is adjusted by the method. The above adjustment method may be performed in multiple rounds, and the specific number of rounds may be input externally or terminated when no cell can be adjusted. Each round of calculation may start with a certain group of cells, and the power of the cells of other groups is kept unchanged when the group of cells calculates. For the same group, because the influence areas of any two cells do not intersect, all the cells can be calculated in parallel according to the above algorithm. And after all the calculations are finished, giving an optimization scheme of the cell power according to the adjustment result.
For example, fig. 8 shows the result of performing cell power adjustment on a certain target area by using the method provided by the present invention, and fig. 9 shows the result of antenna coverage performance change after adjusting the power of a part of cells in a certain target area.
By the method provided by the embodiment of the invention, the power of each cell in the same group is adjusted in parallel, so that the automatic power optimization of large-scale cells in a large range can be realized, and the calculation result is rapidly output for more than ten thousand levels of cells. Meanwhile, the grouping method for the cell is also suitable for calculating other large-scale planning optimization schemes.
Based on the same inventive concept, an embodiment of the present invention further provides an apparatus for adjusting cell power, and as shown in fig. 10, the apparatus includes:
a first determining unit 1001 configured to determine a cell to be adjusted of the antenna power to be adjusted;
a second determining unit 1002, configured to determine an antenna coverage area of each cell to be adjusted according to the electronic map;
a grouping unit 1003, configured to divide the cells to be adjusted into N groups, where antenna coverage areas of the cells to be adjusted included in each of the N groups are not overlapped, each group in the N groups corresponds to an adjustment order of antenna power, and N is a positive integer;
an adjusting unit 1004, configured to adjust antenna powers of multiple cells to be adjusted included in each group according to the adjustment order, and adjust antenna powers of multiple cells to be adjusted included in the same group in parallel.
Optionally, the cell to be adjusted is a cell included in a target area of the antenna power to be adjusted, or a cell included in an area where the target area is expanded by a first preset range.
Optionally, the adjusting unit 1004 is specifically configured to:
adjusting antenna power for a first cell, wherein the first cell is any one of the cells to be adjusted:
adjusting the antenna power of the first cell based on the antenna power adjustment range, and evaluating the performance parameters of all cells included in the protection area;
when the performance parameter value of the first cell does not change towards the direction representing that the antenna coverage performance becomes better, and the performance parameter value of any cell included in the estimated protection area changes towards the direction of antenna coverage performance deterioration compared with the performance parameter value of any cell before the antenna power adjustment is carried out on the first cell, the adjustment of the antenna power of the first cell is stopped;
the protection area is an area obtained by removing the target area from an area obtained by expanding the target area by a second preset range, and the second preset range is larger than the first preset range.
Optionally, the performance parameter comprises at least one of: the method comprises the following steps of calculating the ratio of a weak coverage grid in an antenna coverage area of a cell to the number of grids included in the antenna coverage area of the cell, the average overlapping coverage of all grids included in the antenna coverage area of the cell, and the ratio of a cell boundary grid in the antenna coverage area of the cell to the grids included in the antenna coverage area of the cell.
Optionally, the adjustment order is obtained by sorting based on the number of measurement reports of the largest number of cells in the N groups, where the largest number of cells is a cell that receives the largest number of measurement reports in a preset time period.
For convenience of description, the above parts are separately described as modules (or units) according to functional division. Of course, the functionality of the various modules (or units) may be implemented in the same or in multiple pieces of software or hardware in practicing the invention.
In some possible embodiments, a computing device according to the present invention may include at least one processor, and at least one memory. Wherein the memory stores program code which, when executed by the processor, causes the processor to perform the steps of the method for adjusting cell power according to various exemplary embodiments of the present invention described above in this specification.
A computing device according to this embodiment of the invention is described below with reference to fig. 11. The computing device shown in fig. 11 is only an example and should not bring any limitations to the functionality or scope of use of the embodiments of the present invention.
As shown in fig. 11, the computing apparatus is in the form of a general purpose computing device. Components of the computing device may include, but are not limited to: the at least one processor 1110, the at least one memory 1120, a bus 1130 connecting the processor 1110 and the memory 1120, and a communication interface 1140. Bus 1130 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a processor, or a local bus using any of a variety of bus architectures.
The memory 1120 may include readable media in the form of volatile memory, such as Random Access Memory (RAM) and/or cache memory 1120, and may further include Read Only Memory (ROM). The memory 1120 is used for storing the program codes executed by the processor 1110, and the program codes are used for implementing the method for adjusting the cell power according to any of the above embodiments.
In some possible embodiments, the various aspects of the method for adjusting cell power provided by the present invention may also be implemented in the form of a program product including program code for causing a computer device to perform the steps of the method for adjusting cell power according to various exemplary embodiments of the present invention described above in this specification when the program product is run on the computer device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A method for adjusting cell power, comprising:
determining a cell to be adjusted of the antenna power to be adjusted;
determining the antenna coverage area of each cell to be adjusted according to the electronic map;
dividing cells to be adjusted into N groups, wherein the antenna coverage areas of the cells to be adjusted included in each group in the N groups are not overlapped, each group in the N groups corresponds to the adjustment sequence of the antenna power, and N is a positive integer;
and adjusting the antenna power of the cells to be adjusted included in each group according to the adjusting sequence, and adjusting the antenna power of the cells to be adjusted included in the same group in parallel.
2. The method of claim 1, wherein the cell to be adjusted is a cell included in a target area of the antenna power to be adjusted, or a cell included in an area where the target area is enlarged by a first preset range.
3. The method of claim 2, wherein adjusting for antenna power of a plurality of cells to be adjusted included in each group comprises:
adjusting antenna power for a first cell, wherein the first cell is any one of the cells to be adjusted:
adjusting the antenna power of the first cell based on the antenna power adjustment range, and evaluating the performance parameters of all cells included in the protection area;
when the performance parameter value of the first cell does not change in a direction representing that the antenna coverage performance becomes better, and the performance parameter value of any cell included in the estimated protection area does not change in a direction of antenna coverage performance degradation compared with the performance parameter value of any cell before the antenna power adjustment is performed on the first cell, stopping adjusting the antenna power of the first cell;
the protection area is an area obtained by removing the target area from an area obtained by expanding the target area by a second preset range, and the second preset range is larger than the first preset range.
4. The method of claim 3, wherein the performance parameter comprises at least one of: the method comprises the following steps of calculating the ratio of a weak coverage grid in an antenna coverage area of a cell to the number of grids included in the antenna coverage area of the cell, the average overlapping coverage of all grids included in the antenna coverage area of the cell, and the ratio of a cell boundary grid in the antenna coverage area of the cell to the grids included in the antenna coverage area of the cell.
5. The method according to any one of claims 1 to 4, wherein the adjustment order is obtained by sorting based on the measurement report number of the largest number of cells in the N groups, wherein the largest number of cells receive the largest number of measurement reports in a preset time period.
6. An apparatus for adjusting cell power, comprising:
a first determining unit, configured to determine a cell to be adjusted of the antenna power to be adjusted;
the second determining unit is used for determining the antenna coverage area of each cell to be adjusted according to the electronic map;
the device comprises a grouping unit, a power adjusting unit and a power adjusting unit, wherein the grouping unit is used for dividing cells to be adjusted into N groups, the antenna coverage areas of the cells to be adjusted in each group in the N groups are not overlapped, each group in the N groups corresponds to the adjustment sequence of antenna power, and N is a positive integer;
and the adjusting unit is used for adjusting the antenna power of the cells to be adjusted included in each group according to the adjusting sequence and adjusting the antenna power of the cells to be adjusted included in the same group in parallel.
7. The apparatus of claim 6, wherein the cell to be adjusted is a cell included in a target area of the antenna power to be adjusted, or a cell included in an area where the target area is enlarged by a first preset range.
8. The apparatus of claim 7, wherein the adjustment unit is specifically configured to:
adjusting antenna power for a first cell, wherein the first cell is any one of the cells to be adjusted:
adjusting the antenna power of the first cell based on the antenna power adjustment range, and evaluating the performance parameters of all cells included in the protection area;
when the performance parameter value of the first cell does not change towards the direction representing that the antenna coverage performance becomes better, and the performance parameter value of any cell included in the estimated protection area changes towards the direction of antenna coverage performance deterioration compared with the performance parameter value of any cell before the antenna power adjustment is carried out on the first cell, the adjustment of the antenna power of the first cell is stopped;
the protection area is an area obtained by removing the target area from an area obtained by expanding the target area by a second preset range, and the second preset range is larger than the first preset range.
9. The apparatus of claim 8, wherein the performance parameter comprises at least one of: the method comprises the following steps of calculating the ratio of a weak coverage grid in an antenna coverage area of a cell to the number of grids included in the antenna coverage area of the cell, the average overlapping coverage of all grids included in the antenna coverage area of the cell, and the ratio of a cell boundary grid in the antenna coverage area of the cell to the grids included in the antenna coverage area of the cell.
10. The apparatus according to any one of claims 6 to 9, wherein the adjustment order is obtained by sorting based on the measurement report number of the largest number of cells in the N groups, wherein the largest number of cells is the cell receiving the largest number of measurement reports in a preset time period.
11. A computing device comprising at least one processor and at least one memory, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the steps of the method of any of claims 1 to 5.
12. A computer-readable medium, in which a computer program is stored which is executable by a computing device, the program, when run on the computing device, causing the computing device to perform the steps of the method of any one of claims 1 to 5.
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