WO2018107826A1

WO2018107826A1 - Method and apparatus for adjusting rf parameter

Info

Publication number: WO2018107826A1
Application number: PCT/CN2017/100637
Authority: WO
Inventors: 鲁文涛
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-12-15
Filing date: 2017-09-06
Publication date: 2018-06-21
Also published as: CN108235330A

Abstract

Disclosed is a method and apparatus for adjusting an RF parameter, relating to the technical field of wireless communication. The method comprises: according to MR data currently reported by a UE, performing rasterized modeling on a coverage optimization region, so as to obtain a coverage model of each grid; according to a coverage rate of a current coverage optimization region, determining whether an RF parameter needs to be adjusted; and if it is determined that the RF parameter needs to be adjusted, then taking the derivative of each RF parameter by means of calculating the coverage model, so as to obtain the derivative of the RF parameter, and adjusting the RF parameter according to the derivative of the RF parameter. In the disclosure, by means of adjusting an RF parameter of a cell, a coverage rate of a cell is promoted, especially in a wireless network optimization stage of the communication field.

Description

Method and device for adjusting RF parameters

Technical field

The present disclosure relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for adjusting RF (Radio Frequency) parameters.

Background technique

When the LTE (Long Term Evolution) system performs coverage optimization, although it is possible to find areas with poor coverage, when adjusting the RF parameters of the corresponding cells in these areas, it is only possible to try to obtain better coverage by random extraction. Can't achieve fast convergence.

Summary of the invention

The technical problem to be solved by the solution provided by the embodiment of the present disclosure is that when the LTE system performs coverage optimization, although the cells with poor coverage can be found, when the RF parameters of the cells are adjusted, the random extraction method can only be used to obtain more. Good coverage, can't achieve fast convergence.

A method for adjusting RF parameters according to an embodiment of the present disclosure includes: performing rasterization modeling on an overlay optimization area according to MR data currently reported by the UE, and obtaining an overlay model of each grid; and optimizing according to current coverage. The area coverage rate determines whether the RF parameters need to be adjusted. If it is determined that the RF parameters need to be adjusted, the RF parameters are derived by calculating the coverage model to obtain the RF parameter derivatives, and the RF parameters are adjusted according to the RF parameter derivatives. .

Preferably, the MR data includes UE location data, reference signal received power data, and primary neighbor cell relationship data.

Preferably, the RF parameters include an electronic downtilt, a mechanical downtilt, an orientation angle, and a reference power.

Preferably, determining, according to the current coverage optimization area coverage, whether the RF parameter needs to be adjusted includes: comparing the coverage optimization area coverage rate with a preset area coverage rate; if the coverage optimization area coverage rate If the preset area coverage is exceeded, it is determined that the RF parameter does not need to be adjusted; if the coverage optimization area coverage does not exceed the preset area coverage, it is determined that the RF parameter needs to be adjusted.

Preferably, the RF parameters are derived by calculating a coverage model to obtain an RF parameter derivative, and adjusting the RF parameters according to the RF parameter derivative includes: calculating an electronic downtilt angle of the RF parameter by using the coverage model, and mechanical The downtilt angle, the orientation angle, and the reference power are respectively derived, and the derivative of the electronic downtilt angle, the derivative of the mechanical downtilt angle, the derivative of the orientation angle, and the derivative of the reference power in the RF parameter are obtained, respectively; according to the derivative of the electronic downtilt angle in the obtained RF parameter, Derivative of the mechanical downtilt, derivative of the orientation angle, and derivative of the reference power, determine the electronic downtilt adjustment direction, the mechanical downtilt adjustment direction, the orientation angle adjustment direction, and the reference power adjustment direction in the RF parameter, and adjust the RF parameters according to the .

An apparatus for adjusting RF parameters according to an embodiment of the present disclosure includes: an acquiring module, configured to The MR data currently reported is rasterized to the coverage optimization area to obtain the coverage model of each grid; the determination module is configured to determine whether the RF parameters need to be adjusted according to the current coverage optimization area coverage; The module is configured to determine the RF parameters by calculating the coverage model to obtain the RF parameter derivatives, and adjust the RF parameters according to the RF parameter derivatives.

Preferably, the determining module includes: a comparing unit, configured to compare the coverage optimization area coverage with a preset area coverage; and a determining unit, configured to: when the coverage optimization area coverage exceeds a preset area The coverage rate determines that the RF parameters need not be adjusted, and when the coverage optimization area coverage does not exceed the preset area coverage, it is determined that the RF parameters need to be adjusted.

Preferably, the adjustment module includes: an obtaining unit, configured to calculate an electronic downtilt angle, a mechanical downtilt angle, an orientation angle, and a reference power in the RF parameter by calculating the coverage model, respectively, to obtain an electronic downtilt angle in the RF parameter. Derivative, derivative of mechanical downtilt, derivative of orientation angle, and derivative of reference power; adjustment unit for derivative of electron downtilt, derivative of mechanical downtilt, derivative of orientation angle, and derivative of reference power according to the obtained RF parameters Determine the electronic downtilt adjustment direction, the mechanical downtilt adjustment direction, the orientation angle adjustment direction, and the reference power adjustment direction in the RF parameter, and adjust the RF parameters according to the same.

According to the solution provided by the embodiment of the present disclosure, the adjustment direction of each parameter is quickly found by the above-mentioned method, thereby quickly finding the target value.

DRAWINGS

FIG. 1 is a flowchart of a method for adjusting RF parameters according to an embodiment of the present disclosure;

2 is a schematic diagram of an apparatus for adjusting RF parameters according to an embodiment of the present disclosure;

FIG. 3 is a flowchart of a method for adjusting RF parameters provided by an embodiment of the present disclosure.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

FIG. 1 is a flowchart of a method for adjusting RF parameters according to an embodiment of the present disclosure. As shown in FIG. 1 , the method includes:

Step S101: Perform rasterization modeling on the coverage optimization area according to the MR data currently reported by the UE, and obtain an overlay model of each grid. Step S102: Determine whether the RF parameter needs to be performed according to the current coverage optimization area coverage rate. Adjustment; Step S103: If it is determined that the RF parameters need to be adjusted, the RF parameters are derived by calculating the coverage model to obtain the RF parameter derivatives, and the RF parameters are adjusted according to the RF parameter derivatives.

The MR data includes UE location data, reference signal received power data, and primary neighbor cell relationship data. The RF parameters include an electronic downtilt, a mechanical downtilt, an orientation angle, and a reference power.

The determining, according to the current coverage optimization area coverage, whether the RF parameter needs to be adjusted includes: comparing the coverage optimization area coverage rate with a preset area coverage rate; if the coverage optimization area coverage rate exceeds The preset area coverage determines that the RF parameters need not be adjusted; if the coverage optimization area coverage does not exceed the preset area coverage, it is determined that the RF parameters need to be adjusted.

Wherein, the RF parameters are derived by calculating a coverage model to obtain a derivative of the RF parameter, and the RF parameter is adjusted according to the RF parameter derivative, including: calculating the electronic downtilt angle of the RF parameter in the coverage model, and mechanically The dip angle, the orientation angle, and the reference power are respectively derived, and the derivative of the electronic downtilt angle, the derivative of the mechanical downtilt angle, the derivative of the orientation angle, and the derivative of the reference power in the RF parameter are obtained. The derivative of the electronic downtilt angle in the obtained RF parameter, the mechanical The derivative of the downtilt angle, the derivative of the orientation angle, and the derivative of the reference power determine the electronic downtilt adjustment direction, the mechanical downtilt adjustment direction, the orientation angle adjustment direction, and the reference power adjustment direction in the RF parameter, and adjust the RF parameters according to the same.

2 is a schematic diagram of an apparatus for adjusting an RF parameter according to an embodiment of the present disclosure, including: an obtaining module 201, configured to perform rasterization modeling on an overlay optimization area according to MR data currently reported by a UE, to obtain each grid. The coverage module 202 is configured to determine whether the RF parameter needs to be adjusted according to the current coverage optimization area coverage rate, and the adjustment module 203 is configured to: when determining that the RF parameter needs to be adjusted, calculate the coverage model for each The RF parameters are derived separately, and the RF parameter derivatives are obtained, and the RF parameters are adjusted according to the RF parameter derivatives.

The determining module 202 includes: a comparing unit, configured to compare the coverage optimization area coverage rate with a preset area coverage rate; and a determining unit, configured to: when the coverage optimization area coverage rate exceeds a preset area The coverage rate determines that the RF parameters need not be adjusted, and when the coverage optimization area coverage does not exceed the preset area coverage, it is determined that the RF parameters need to be adjusted.

The adjustment module 203 includes: an obtaining unit, configured to calculate an electronic downtilt angle, a mechanical downtilt angle, an orientation angle, and a reference power in the RF parameter by calculating the coverage model, respectively, to obtain an electronic downtilt angle in the RF parameter. Derivative, derivative of mechanical downtilt, derivative of orientation angle, and derivative of reference power; adjustment unit for derivative of electron downtilt, derivative of mechanical downtilt, derivative of orientation angle, and derivative of reference power according to the obtained RF parameters Determine the electronic downtilt adjustment direction, the mechanical downtilt adjustment direction, the orientation angle adjustment direction, and the reference power adjustment direction in the RF parameter, and adjust the RF parameters according to the same.

FIG. 3 is a flowchart of a method for adjusting RF parameters according to an embodiment of the present disclosure. As shown in FIG. 3, the method includes:

Step 1: Prepare to cover the relevant information of optimization dependencies; Antenna file: from the antenna manufacturer, mainly providing antenna gain in all directions.

Three-dimensional map: mainly provides elevation information of each geographical location.

The MR data is derived from the UE reporting location, the RSRP (Reference Signal Receiving Power), the primary neighbor cell relationship, and the like.

Engineering parameters: provide the cell and antenna correspondence to be optimized and the original RF antenna parameters of the cell to be adjusted. Algorithm Execution Strategy: Provides how to adjust, step size, range, etc. each time during the search for RF parameters.

Step 2: Calculate the current coverage of the optimized area.

Step 3: If the coverage or optimization times reach the threshold set by the user, stop optimization, go to step 6, otherwise continue to step 4.

Step 4: Calculate the derivative of the RF parameter of each cell to the current coverage model.

1. Coverage modeling

Let the optimized area raster set be K _i i∈[0,N].

Let the corresponding cell on the grid K _i be C _j , j ∈ [k _i0 , k _is ].

Let the RSRP value of each cell on the grid K _i be R _j , j ∈ [k _i0 , k _is ].

Let the grid covered by the cell C _j be K _i , i ∈ [c _j0 , c _jt ].

Let the RSRP value of the cell C _j on the covered grid be R _i , i ∈ [c _j0 , c _jt ].

Let the cell C _j reference power be P _j .

Let the cell C _j electronic downtilt angle be θ _mj .

Let the cell C _j mechanical downtilt angle be θ _j .

Let the cell C _j face angle be

1.1 Model function of a single grid

1.2 Optimization area model function

The optimization goal is to find min(f).

2. RF parameter derivation

The positive east direction is the X-axis direction, and the true north direction is the Y-axis direction.

The antenna mechanical downtilt angle is θ∈[-90,90], and the receiving antenna height is lower than the transmitting antenna.

The horizontal angle of the antenna is

The horizontal X axis is 0, clockwise is positive and counterclockwise is negative.

The downtilt angle between the UE and the cell is θ _U ∈ [-90, 90].

The horizontal angle between the UE and the cell is

Antenna horizontal loss is

The particle size is 1 degree.

The vertical loss of the antenna is V _L (θ), θ ∈ [0, 360], and the granularity is 1 degree.

The maximum gain of the antenna is G.

The electron downtilt angle is θ _m .

Let P be the reference power of the cell.

Let R be the RSRP value of the cell to the grid.

Let unmaskloss be the path loss value of the cell to the grid.

Let the cell C _j reference power be P _j and the objective function be its derivative

The adjustment step size is S _pj .

Let the cell C _j electronic downtilt angle be θ _mj and the objective function be its derivative

The adjustment step size is S _θmj .

Let the cell C _j mechanical downtilt angle be θ _j and the objective function be its derivative

The adjustment step size is S _θj .

Let the cell C _j face angle be

The objective function has its derivative

Adjustment step size is

2.1 The location of the RSRP model of the UE

among them,

2.2 RSRP model for RF parameter derivatives

Electronic downtilt angle:

among them,

Mechanical downtilt:

among them,

Orientation angle:

among them,

Reference power:

2.3 Single-grid overlay model for RF parameter derivatives

Electronic downtilt angle:

Mechanical downtilt:

Orientation angle:

Reference power:

2.4 Optimize the regional coverage model for the RF parameter derivative

Electronic downtilt angle:

Mechanical downtilt:

Orientation angle:

Reference power:

3.RF parameter adjustment

Electronic downtilt

No adjustment is made when the antenna does not support ESC;

When the antenna supports ESC, the adjustment method is as follows:

Mechanical downtilt

Orientation angle

Reference power

Step 5: Adjust the RF according to the RF parameter derivative, and go to step 2;

Step 6: Output an optimal RF parameter adjustment scheme.

According to the solution provided by the embodiment of the present disclosure, the network coverage is modeled based on the wireless measurement report MR data, the antenna space gain, the three-dimensional map and the like reported by the LTE user terminal UE, and the derivative of the RF parameter of the cell is calculated by the calculation model to obtain the RF. The direction of the parameters is adjusted to achieve rapid optimization of network coverage.

Although the present disclosure has been described in detail above, the present disclosure is not limited thereto, and various modifications may be made by those skilled in the art in accordance with the principles of the present disclosure. Therefore, modifications made in accordance with the principles of the present disclosure are to be understood as falling within the scope of the present disclosure.

Industrial applicability

The method and device for adjusting the RF parameters involved in the present disclosure can quickly find the adjustment direction of each parameter, thereby quickly finding the target value.

Claims

A method for adjusting RF parameters, including:

Performing rasterization modeling on the coverage optimization area according to the MR data currently reported by the UE, and obtaining a coverage model of each grid;

Determine whether the RF parameters need to be adjusted according to the current coverage optimization area coverage rate;

If it is determined that the RF parameters need to be adjusted, the RF parameters are derived by calculating the coverage model to obtain the RF parameter derivatives, and the RF parameters are adjusted according to the RF parameter derivatives;

Wherein, the MR refers to a measurement report; and the RF refers to a radio frequency.
The method of claim 1, the MR data comprising UE location data, reference signal received power data, and primary neighbor cell relationship data.
The method of claim 1 or 2, the RF parameters comprising an electronic downtilt, a mechanical downtilt, an orientation angle, and a reference power.
The method according to claim 3, wherein determining whether the RF parameters need to be adjusted according to the current coverage optimization area coverage includes:

Comparing the coverage optimization area coverage with a preset area coverage rate;

If the coverage optimization area coverage exceeds the preset area coverage, it is determined that the RF parameter does not need to be adjusted;

If the coverage optimization area coverage does not exceed the preset area coverage, it is determined that the RF parameters need to be adjusted.
The method according to claim 4, wherein the RF parameters are derived by calculating a coverage model to obtain respective RF parameters, and the RF parameters are adjusted according to the RF parameter derivatives, including:

By calculating the coverage model, the electronic downtilt angle, the mechanical downtilt angle, the orientation angle, and the reference power in the RF parameters are respectively obtained, and the derivative of the electronic downtilt angle, the derivative of the mechanical downtilt angle, the derivative of the orientation angle, and the reference are obtained. Derivative of power;

According to the derivative of the electronic downtilt angle, the derivative of the mechanical downtilt angle, the derivative of the orientation angle and the derivative of the reference power, the electronic downtilt adjustment direction, the mechanical downtilt adjustment direction, the orientation angle adjustment direction and the reference in the RF parameter are determined. The power is adjusted in direction and the RF parameters are adjusted according to it.
A device for adjusting RF parameters, comprising:

Obtaining a module, configured to perform rasterization modeling on the coverage optimization area according to the MR data currently reported by the UE, to obtain an overlay model of each grid;

Determining a module, setting to optimize the area coverage according to the current coverage, and determining whether the RF parameter needs to be adjusted;

The adjustment module is configured to determine the RF parameters by calculating the coverage model to obtain the RF parameter derivatives, and adjust the RF parameters according to the RF parameter derivatives.
The apparatus according to claim 6, wherein said MR data comprises UE location data, reference signal reception work Rate data and primary neighbor cell relationship data.
The apparatus of claim 6 or 7, the RF parameters comprising an electronic downtilt angle, a mechanical downtilt angle, an orientation angle, and a reference power.
The apparatus of claim 8, the determining module comprising:

a comparing unit, configured to compare the coverage optimization area coverage with a preset area coverage;

a determining unit, configured to determine that the RF parameter is not required to be adjusted when the coverage optimization area coverage exceeds the preset area coverage, and when the coverage optimization area coverage does not exceed the preset area coverage, Make sure you need to adjust the RF parameters.
The apparatus of claim 9, the adjustment module comprising:

The obtaining unit is configured to calculate the electronic downtilt angle, the mechanical downtilt angle, the orientation angle, and the reference power in the RF parameter by calculating the coverage model, respectively, to obtain a derivative of the electronic downtilt angle, a derivative of the mechanical downtilt angle, and an orientation of the RF parameter. The derivative of the angle and the derivative of the reference power;

The adjusting unit is configured to determine an electronic downtilt adjustment direction, a mechanical downtilt adjustment direction, and an orientation in the RF parameter according to the derivative of the electronic downtilt angle, the derivative of the mechanical downtilt angle, the derivative of the orientation angle, and the derivative of the reference power in the obtained RF parameter. The angle adjustment direction and the reference power adjustment direction are adjusted according to the RF parameters.
A storage medium arranged to store program code for performing the method of any one of claims 1 to 5.