CN111246364B

CN111246364B - Cross-zone coverage assessment method and device

Info

Publication number: CN111246364B
Application number: CN201811436416.2A
Authority: CN
Inventors: 姜奇华; 彭陈发; 胡镇; 张砚寒; 李俨; 郑献坤; 侯优优; 朱震海; 邱桂星; 姚柒零; 邓飞
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Zhejiang Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Zhejiang Co Ltd
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2021-11-23
Anticipated expiration: 2038-11-28
Also published as: CN111246364A

Abstract

The embodiment of the invention provides a cross-zone coverage evaluation method and a device, wherein the method comprises the following steps: acquiring cell information of a serving cell, cell information of a neighboring cell of the serving cell and MDT data reported at each sampling point in the serving cell, wherein the MDT data comprises longitude and latitude information of the sampling point; acquiring at least one cross-area coverage evaluation point from a plurality of sampling points according to the cell information of the serving cell, the cell information of the adjacent cell and the longitude and latitude information of each sampling point; acquiring at least one affected adjacent cell corresponding to each cross-area coverage evaluation point; determining a cross-area coverage coefficient of each cross-area coverage evaluation point according to the cell information of the service cell, the cell information of at least one affected adjacent cell corresponding to each cross-area coverage evaluation point and the longitude and latitude information of at least one cross-area coverage evaluation point; and evaluating the handover coverage of the service cell according to the handover coverage coefficient of each handover coverage evaluation point. The embodiment of the invention improves the accuracy of the cross-region coverage evaluation.

Description

Cross-zone coverage assessment method and device

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a cross-zone coverage evaluation method and device.

Background

As LTE network construction becomes mature, the deep coverage capability of the network is gradually improved, and the inter-site distance is further reduced, which leads to a large-power wide-coverage base station existing in the initial stage of network construction, and is very easy to generate cross-area coverage under the condition that the antenna parameters are not adjusted in time. In addition, in the process of network planning and design, some cross-area coverage also exists due to the reasons of spread geographic environment, limited site resources, unreasonable antenna design and the like.

The handover coverage easily causes the problems of increased network interference, disordered handover relation and capacity caused by excessively absorbing traffic, and the problems have great influence on network perception and are also the problems that operators need to consider and solve with great importance.

Currently, the handover coverage determination mainly includes the following two types:

firstly, the coverage range of a cell is presented in a physicochemical way by combining drive test sampling points and professional software such as mapinfo, and then an optimization engineer judges whether cross-zone coverage exists. The judgment mode has high drive test cost and low efficiency, and is generally used for carrying out retest or periodic inspection test only after complaints of users; in addition, the problem finding mode is passive and has a long period, and the problem of the cross-zone cannot be actively found in time, so that the influence of the cross-zone coverage is avoided or reduced in time; in addition, the judgment result of the cross-zone coverage is influenced by the subjective meaning of an engineer to a certain extent, the drive test range and the path are limited, and the local cross-zone coverage cannot be found timely, but misleading can be caused to the judgment of the engineer.

Secondly, whether handover coverage exists is judged according to the distribution of a Timing Advance (TA) field and an Angle-of-Arrival (AOA) in a Measurement Report (MR). The method is simple and feasible compared with drive test analysis by analyzing MR data, but the distance judgment based on TA distribution is greatly influenced by the geographical environment, the accuracy is limited, and the method is not suitable especially under the conditions of complicated geographical environment and more barriers. In addition, AOA can output more accurate results only when the transmitting terminal antenna meets the condition of multiple antennas, and the single antenna cannot calculate the AOA.

In summary, the handover coverage determination method in the prior art has the problems of low efficiency and low accuracy.

Disclosure of Invention

The embodiment of the invention provides a cross-zone coverage evaluation method and device, aiming at solving the problems of low efficiency and low accuracy in judging cross-zone coverage in the prior art.

In a first aspect, an embodiment of the present invention provides a method for evaluating a handover coverage, where the method includes:

acquiring cell information of a serving cell, cell information of a neighboring cell of the serving cell and MDT data of a minimized path reported by each sampling point in a plurality of sampling points in the serving cell, wherein the MDT data comprises longitude and latitude information of the sampling points;

acquiring at least one cross-area coverage evaluation point from a plurality of sampling points according to the cell information of the serving cell, the cell information of the adjacent cell and the longitude and latitude information of each sampling point in the plurality of sampling points;

acquiring at least one affected adjacent cell corresponding to each cross-area coverage evaluation point from the adjacent cells of the service cell;

determining a cross-area coverage coefficient of each cross-area coverage evaluation point according to the cell information of the service cell, the cell information of at least one affected adjacent cell corresponding to each cross-area coverage evaluation point and the longitude and latitude information of at least one cross-area coverage evaluation point;

and evaluating the handover coverage of the service cell according to the handover coverage coefficient of each handover coverage evaluation point.

In a second aspect, an embodiment of the present invention provides a device for evaluating handoff coverage, the device comprising:

the system comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring cell information of a serving cell, cell information of a neighboring cell of the serving cell and MDT data of a minimized path reported by each sampling point in a plurality of sampling points in the serving cell, and the MDT data comprises longitude and latitude information of the sampling points;

the second acquisition module is used for acquiring at least one cross-area coverage evaluation point from a plurality of sampling points according to the cell information of the serving cell, the cell information of the adjacent cell and the longitude and latitude information of each sampling point in the plurality of sampling points;

a third obtaining module, configured to obtain at least one affected neighbor cell corresponding to each handover coverage evaluation point from the neighbor cells of the serving cell;

a determining module, configured to determine a handover coverage coefficient of each handover coverage evaluation point according to the cell information of the serving cell, the cell information of at least one affected neighboring cell corresponding to each handover coverage evaluation point, and the longitude and latitude information of at least one handover coverage evaluation point;

and the evaluation module is used for evaluating the cross-region coverage of the service cell according to the cross-region coverage coefficient of each cross-region coverage evaluation point.

In a third aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the handover coverage assessment method when executing the computer program.

In a fourth aspect, embodiments of the present invention provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for evaluating a handover coverage.

The cross-area coverage evaluation method and the device provided by the embodiment of the invention realize the cross-area coverage analysis based on the MDT data by acquiring the cell information of a service cell, the cell information of all the adjacent cells of the service cell and the MDT data which is reported by each sampling point in the service cell and comprises the longitude and latitude information of the sampling point, acquiring at least one cross-area coverage evaluation point from a plurality of sampling points according to the acquired information, acquiring at least one affected adjacent cell corresponding to each cross-area coverage evaluation point, then determining the cross-area coverage coefficient of each cross-area coverage evaluation point according to the cell information of the service cell, the cell information of at least one affected adjacent cell corresponding to each cross-area coverage evaluation point and the longitude and latitude information of at least one cross-area coverage evaluation point, and finally evaluating the cross-area coverage of the service cell according to the cross-area coverage coefficient of each cross-area coverage evaluation point, based on that the MDT data comprises accurate longitude and latitude information of sampling points, the cross-zone coverage coefficient of each cross-zone coverage evaluation point is obtained through a large amount of sampling point data, so that the cross-zone coverage possibility of the service cell at each cross-zone coverage evaluation point is accurately reflected, and the efficiency and the accuracy in cross-zone coverage evaluation are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a flow chart illustrating the steps of a method for evaluating handoff coverage in an embodiment of the present invention;

figure 2 shows a block diagram of a handoff coverage evaluation apparatus in an embodiment of the present invention;

fig. 3 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.

As shown in fig. 1, which is a flowchart illustrating the steps of a handover coverage assessment method according to an embodiment of the present invention, the method includes the following steps:

step 101: the method comprises the steps of obtaining cell information of a service cell, cell information of a neighboring cell of the service cell and MDT data of a minimized path reported by each sampling point in a plurality of sampling points in the service cell.

In this step, specifically, the MDT data includes latitude and longitude information of the sampling point.

In addition, when the MDT data reported at each sampling point in the serving cell is acquired, the MDT data reported by the terminal at the sampling point may be acquired.

In addition, specifically, the cell information of the serving cell includes longitude and latitude information and direction angle information of the serving cell, and the cell information of the neighboring cell includes longitude and latitude information and direction angle information of the neighboring cell.

MDT is a drive test solution proposed by the 3GPP protocol R11 version. The MDT provides a comprehensive reference view for the network optimization, analysis and diagnosis process based on the measurement report of the terminal, and can partially replace manual drive test. In addition, in particular, MDT requires support of a terminal of version R10, and the terminal needs to have capabilities of radio environment measurement (including Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Power Headroom Report (PHR)), typical event measurement, and location information measurement.

In addition, specifically, the system initiates MDT reporting for the whole network level, the area level (based on one or a group of TAs) and the cell, and certainly, the MDT reporting may include two modes, namely a log type MDT mode and an immediate type MDT mode, which may be configured by an Operation and Maintenance Center (OMC) side when issuing an MDT task.

In addition, specifically, the MDT function supports reporting of Global Navigation Satellite System (GNSS) location information and positioning accuracy information, throughput and interference, delay and packet loss rate, and Random Access Channel (RACH) related indicators. In addition, for various MDT task types, the system simultaneously supports the same-frequency measurement and the different-frequency measurement, and can simultaneously configure the same-frequency/different-frequency measurement tasks, but the same-frequency/different-frequency measurement tasks need to be decoupled. The pilot frequency measurement frequency point directly multiplexes the measurement frequency point configuration of the existing system, and does not need to be configured in an MDT task independently. In addition, the reported MDT measurement result can be inquired and displayed on the OMC side.

Step 102: and acquiring at least one cross-area coverage evaluation point from the plurality of sampling points according to the cell information of the serving cell, the cell information of the adjacent cell and the longitude and latitude information of each sampling point in the plurality of sampling points.

In this step, specifically, after the MDT data reported at the multiple sampling points in the serving cell is obtained, at least one handover coverage evaluation point may be obtained from the multiple sampling points according to the cell information of the serving cell, the cell information of the neighboring cell, and the longitude and latitude information of each of the multiple sampling points.

Wherein, when acquiring at least one handover coverage evaluation point, the method can be implemented by any one of the following two methods:

firstly, aiming at each sampling point, acquiring the distance from the sampling point to a service cell and the distance from the sampling point to each adjacent cell according to longitude and latitude information of the sampling point, longitude and latitude information of the service cell and longitude and latitude information of each adjacent cell; and when the distance from the sampling point to the serving cell is detected to be greater than the distance from the sampling point to at least one adjacent cell of the serving cell, determining the sampling point as a handover coverage evaluation point.

Specifically, in this embodiment, the distance from each sampling point to the serving cell may be calculated according to the longitude and latitude information of each sampling point and the longitude and latitude information of the serving cell, and meanwhile, the distance from each sampling point to each neighboring cell may also be calculated according to the longitude and latitude information of each sampling point and the longitude and latitude information of each neighboring cell, so that whether the distance from each sampling point to the serving cell is greater than the distance from the sampling point to at least one neighboring cell of the serving cell or not may be determined according to the distance from each sampling point to the serving cell and the distance from each sampling point to each neighboring cell, and when it is determined that the distance from the sampling point to the serving cell is greater than the distance from the sampling point to at least one neighboring cell of the serving cell, the sampling point is determined as the handover coverage evaluation point. In addition, the distance from the sampling point to the service cell and the distance from the sampling point to the adjacent cell are calculated based on the longitude and latitude information of the service cell, the adjacent cell and the sampling point, and the accuracy of the calculated distance is guaranteed.

Secondly, aiming at each sampling point, acquiring an included angle between the sampling point and an azimuth angle of the service cell and an included angle between the sampling point and an azimuth angle of each adjacent cell according to longitude and latitude information, longitude and latitude information and direction angle information of the sampling point, longitude and latitude information and direction angle information of the service cell and longitude and latitude information and direction angle information of each adjacent cell; and when detecting that the included angle of the azimuth angle between the sampling point and the serving cell is larger than the included angle of the azimuth angle between the sampling point and at least one adjacent cell of the serving cell, determining the sampling point as a cross-area coverage evaluation point.

Specifically, in this embodiment, an included angle of an azimuth angle between each sampling point and the serving cell is calculated according to the longitude and latitude information of each sampling point, the longitude and latitude information of the serving cell, and the direction angle information, meanwhile, the included angle of the azimuth angle between each sampling point and each adjacent cell can be calculated according to the longitude and latitude information of each sampling point and the longitude and latitude information and the azimuth angle information of each adjacent cell, therefore, whether the azimuth angle included angle between each sampling point and the service cell is larger than the azimuth angle included angle between the sampling point and at least one adjacent cell of the service cell can be judged according to the azimuth angle included angle between each sampling point and the service cell and the azimuth angle included angle between each sampling point and each adjacent cell, and when the included angle of the azimuth angle between the sampling point and the service cell is determined to be larger than the included angle of the azimuth angle between the sampling point and at least one adjacent cell of the service cell, determining the sampling point as a cross-area coverage evaluation point. In addition, the azimuth angle included angle between the sampling point and the service cell and the azimuth angle included angle between the sampling point and the adjacent cell are calculated based on the longitude and latitude information of the service cell, the adjacent cell and the sampling point and the azimuth angle information of the service cell and the adjacent cell, so that the accuracy of the calculated azimuth angle included angle is ensured.

In this way, by removing the reasonable coverage sampling points from the plurality of sampling points and determining the handover coverage evaluation points, the present embodiment can evaluate the handover coverage condition of the serving cell only according to the determined handover coverage evaluation points, thereby reducing the workload of the system.

Step 103: and acquiring at least one affected adjacent cell corresponding to each handover coverage evaluation point from the adjacent cells of the service cell.

In this step, specifically, after determining at least one handover coverage evaluation point, for each handover coverage evaluation point, at least one affected neighbor cell corresponding to each handover coverage evaluation point may be obtained from the neighbor cells of the serving cell.

Specifically, the affected neighbor cell refers to a cell in which the neighbor cell at the handover coverage evaluation point affects the serving cell.

When at least one affected neighbor corresponding to each handover coverage evaluation point is obtained from the neighbor of the serving cell, the RSRP of the serving cell at the handover coverage evaluation point reported by each handover coverage evaluation point and the RSRP of each neighbor of the serving cell at the handover coverage evaluation point can be obtained; calculating the difference value of the RSRP of the neighbor cell at the handover coverage evaluation point and the RSRP of the serving cell at the handover coverage evaluation point according to the RSRP of the serving cell at the handover coverage evaluation point reported by the handover coverage evaluation point and the RSRP of the neighbor cell at the handover coverage evaluation point; and when the difference is detected to be larger than a preset threshold value, determining the adjacent cell as an affected adjacent cell corresponding to the handover coverage evaluation point.

Specifically, the preset threshold may be set to-6 dB.

Therefore, the difference value of the reference signal level value of each adjacent cell and the service cell at each cross-area coverage evaluation point is calculated, and when the RSRP difference value at each cross-area coverage evaluation point is larger than-6 dB, the influence of the adjacent cells participating in the RSRP difference value calculation on the service cell is determined, namely the adjacent cells are recorded as the influenced adjacent cells, so that the influenced adjacent cells with the cross-area coverage influence are selected from the plurality of adjacent cells of the service cell, and the workload during the cross-area coverage evaluation on the service cell is reduced.

Step 104: and determining the cross-over coverage coefficient of each cross-over coverage evaluation point according to the cell information of the service cell, the cell information of at least one affected adjacent cell corresponding to each cross-over coverage evaluation point and the longitude and latitude information of at least one cross-over coverage evaluation point.

In this step, specifically, after determining at least one affected neighboring cell corresponding to each handover coverage evaluation point, the handover coverage coefficient of each handover coverage evaluation point may be determined according to the cell information of the serving cell, the cell information of the at least one affected neighboring cell corresponding to each handover coverage evaluation point, and the longitude and latitude information of the at least one handover coverage evaluation point.

Specifically, the handover coverage coefficient of each handover coverage evaluation point can be used for reflecting the handover coverage possibility of the serving cell at each handover coverage evaluation point, so that the handover coverage condition of the serving cell can be evaluated through the handover coverage coefficient of each handover coverage evaluation point.

Step 105: and evaluating the handover coverage of the service cell according to the handover coverage coefficient of each handover coverage evaluation point.

In this step, specifically, after obtaining the handover coefficient of each handover evaluation point, the handover coverage of the serving cell may be evaluated according to the handover coefficient of each handover evaluation point.

When the cross-region coverage of the service cell is evaluated according to the cross-region coverage coefficient of each cross-region coverage evaluation point, calculating the mean value of the cross-region coverage coefficients of all the cross-region coverage evaluation points according to the cross-region coverage coefficient of each cross-region coverage evaluation point, and determining the mean value of the cross-region coverage coefficients of all the cross-region coverage evaluation points as the cross-region coverage evaluation coefficient of the service cell; and then evaluating the handover coverage of the serving cell according to the handover coverage evaluation coefficient of the serving cell.

Therefore, the cross-region coverage evaluation coefficients of all the cross-region coverage evaluation points are fitted into the cross-region coverage evaluation coefficient of the service cell, and the cross-region coverage possibility of the service cell is evaluated through the cross-region coverage evaluation coefficient of the service cell, so that the whole cross-region coverage condition of the service cell is represented digitally.

The embodiment determines the cross-area coverage coefficient of each cross-area coverage evaluation point by acquiring MDT data including longitude and latitude information of sampling points reported by each sampling point in a service cell, acquiring at least one cross-area coverage evaluation point and at least one affected adjacent cell corresponding to each cross-area coverage evaluation point from a plurality of sampling points, then evaluating the cross-area coverage of the service cell according to the cell information of the service cell, the cell information of the at least one affected adjacent cell corresponding to each cross-area coverage evaluation point and the longitude and latitude information of the at least one cross-area coverage evaluation point, and finally evaluating the cross-area coverage of the service cell according to the cross-area coverage coefficient of each cross-area coverage evaluation point, thereby realizing the cross-area coverage analysis based on the MDT data, including accurate longitude and latitude information of the sampling points based on the MDT data, realizing the cross-area coverage coefficient of each cross-area coverage evaluation point through a large amount of sampling points, therefore, the cross-region coverage possibility of the service cell at each cross-region coverage evaluation point is accurately reflected, and the efficiency and the accuracy of the cross-region coverage evaluation are improved.

Further, when determining the handover coverage coefficient of each handover coverage evaluation point according to the cell information of the serving cell, the cell information of at least one affected neighboring cell corresponding to each handover coverage evaluation point, and the longitude and latitude information of at least one handover coverage evaluation point, the method may include the following steps:

step Z1: and aiming at each cross-area coverage evaluation point, acquiring a distance coefficient of the cross-area coverage evaluation point according to the longitude and latitude information of the service cell, the longitude and latitude information of each affected adjacent cell corresponding to the cross-area coverage evaluation point and the longitude and latitude information of the cross-area coverage evaluation point.

In this step, specifically, when acquiring, for each handover coverage evaluation point, a distance coefficient of the handover coverage evaluation point according to the longitude and latitude information of the serving cell, the longitude and latitude information of each affected neighboring cell corresponding to the handover coverage evaluation point, and the longitude and latitude information of the handover coverage evaluation point, the distance coefficient may be calculated by the following formula:

wherein the content of the first and second substances,

d_ja distance coefficient representing a handover coverage evaluation point j; n is_jRepresenting the number of the affected adjacent cells corresponding to the cross-area coverage evaluation point j; l is_sjRepresenting the distance from the cross-area coverage evaluation point j to the service cell, which is obtained by calculation according to the longitude and latitude information of the cross-area coverage evaluation point and the longitude and latitude information of the service cell; l is_iRepresenting the distance from the cross-area coverage evaluation point j to the affected adjacent cell i obtained by calculation according to the longitude and latitude information of the cross-area coverage evaluation point and the longitude and latitude information of the affected adjacent cell i corresponding to the cross-area coverage evaluation point j;

and the mean value of the distances from the service cell to all the affected adjacent cells corresponding to the cross-area coverage evaluation point j is calculated according to the longitude and latitude information of the service cell and the longitude and latitude information of all the affected adjacent cells corresponding to the cross-area coverage evaluation point j.

Specifically, for the acquired handover coverage evaluation points, the more distant the handover coverage evaluation points are from the serving cell, the more likely there is handover coverage. However, at different site densities, the handover coverage probability is different even if the difference between the distance from the handover coverage evaluation point to the serving cell and the distance from the handover coverage evaluation point to each affected neighbor cell is the same. In addition, under the same RSRP condition value, the greater the difference between the distance from the handover coverage evaluation point to the serving cell and the distance from the handover coverage evaluation point to the affected neighbor cell, the greater the probability that handover coverage exists.

In addition, due to geographyThe ideal coverage range of the cell is different under different scenes in order to achieve the optimal coverage effect, and the mean value of the distances between all the affected adjacent cells corresponding to the service cell and the cross-area coverage evaluation point is introduced when the distance coefficient of the cross-area coverage evaluation point is calculated

To reflect the ideal coverage of a single cell of a regional site. The smaller the ideal coverage area of a single cell is, the larger the site density is, and the average value is

The smaller. At this time, the mean value is obtained under the same distance difference condition

The smaller the probability of handover coverage. Thus, the distance coefficient can be used to reflect the handoff coverage under different site density conditions.

Step Z2: and acquiring the angle coefficient of the cross-area coverage evaluation point according to the longitude and latitude information and the direction angle information of the service cell, the longitude and latitude information and the direction angle information of each affected adjacent cell corresponding to the cross-area coverage evaluation point and the longitude and latitude information of the cross-area coverage evaluation point.

In this step, specifically, when obtaining the angle coefficient of the handover coverage evaluation point according to the longitude and latitude information and the direction angle information of the serving cell, the longitude and latitude information and the direction angle information of each affected neighboring cell corresponding to the handover coverage evaluation point, and the longitude and latitude information of the handover coverage evaluation point, the angle coefficient may be calculated by the following formula:

wherein the content of the first and second substances,

δ_jan angle coefficient representing a handover coverage evaluation point j; n is_jRepresenting the number of the affected adjacent cells corresponding to the cross-area coverage evaluation point j;

representing an included angle between the azimuth angle of the cross-area coverage evaluation point j and the azimuth angle of the affected adjacent cell i, which is obtained by calculation according to the longitude and latitude information and the direction angle information of the cross-area coverage evaluation point j and the longitude and latitude information and the direction angle information of the affected adjacent cell i corresponding to the cross-area coverage evaluation point j; theta_jRepresenting an included angle between the cross-area coverage evaluation point j and the azimuth of the service cell, which is obtained by calculation according to the longitude and latitude information of the cross-area coverage evaluation point j and the longitude and latitude information and the azimuth information of the service cell;

indicating included angle

The corresponding antenna gain;

represents the angle theta_jThe corresponding antenna gain.

Specifically, as can be seen from the horizontal plane pattern of the antenna, as the lobe angle increases, the antenna gain decreases gradually, and the corresponding ideal coverage distance decreases, i.e., the coverage area of the cell is not an ideal 120 ° sector area. And calculating the included angle between the cross-area coverage evaluation point and the azimuth angle of the service cell and the included angle between the cross-area coverage evaluation point and the azimuth angle of each affected adjacent cell, acquiring the antenna gain of the corresponding included angle by combining the working parameters of the antenna, and then calculating the angle coefficient of the cross-area coverage evaluation point.

In addition, specifically, in the case that other variables are different, the larger the included angle between the handover coverage evaluation point and the direction angle of the serving cell is, or the smaller the included angle between the handover coverage evaluation point and the direction angle of the affected neighbor cell is, the gain difference is obtained

The larger the angle coefficient obtained, the more likely there is handover coverage.

It should be noted that it is preferable that,

the unit is dB, the relative value of the gains of the affected adjacent cell and the service cell is represented, and the difference value needs to be converted into an absolute value and substituted into a formula for calculation, so that the difference value of the distance of the cell coverage can be more intuitively reflected.

Therefore, the accuracy of the cross-region coverage evaluation is improved by introducing the angle coefficients of different angle gain values as evaluation parameters instead of the cell coverage area which is generally approximate to 120 degrees of horizontal direction angle equivalent coverage.

Step Z3: and determining the cross-region coverage coefficient of the cross-region coverage evaluation point according to the distance coefficient and the angle coefficient of the cross-region coverage evaluation point.

In this step, specifically, when determining the handover coefficient of the handover evaluation point based on the distance coefficient and the angle coefficient of the handover evaluation point, the calculation may be performed by the following formula:

O_j＝n_j×d_j×δ_j(ii) a Wherein the content of the first and second substances,

O_ja handover coverage coefficient representing a handover coverage evaluation point j; n is_jRepresenting the number of the affected adjacent cells corresponding to the cross-area coverage evaluation point j; d_jA distance coefficient representing a handover coverage evaluation point j; delta_jRepresenting the angular coefficient of the handover coverage evaluation point j.

Thus, the embodiment obtains the handover coverage evaluation coefficient of each handover coverage evaluation point through the above steps, and improves the accuracy of the handover coverage evaluation of each handover coverage evaluation point based on the calculation accuracy of the distance coefficient and the angle coefficient, thereby improving the accuracy of the handover coverage evaluation coefficient of the serving cell obtained by normalizing the handover coverage coefficients of all the handover coverage evaluation points, and further improving the accuracy of the handover coverage evaluation of the serving cell.

The above embodiments are explained below by way of examples.

For example, 3 handover coverage evaluation points A, B and C at different positions are selected according to the MDT data of the serving cell, then the handover coverage coefficient of each handover coverage evaluation point is calculated respectively, and then the correctness of the evaluation method is judged by comparing and verifying the working parameters and the geographical location information.

For example, the MDT data information for each handover coverage evaluation point is shown in the following table:

calculating the cross-zone coverage coefficient of each cross-zone coverage evaluation point according to the steps, taking the cross-zone coverage evaluation point A as an example, and according to the longitude and latitude of the cross-zone coverage evaluation point, the longitude and latitude of the service cell, the direction angle of the service cell, the longitude and latitude of the affected adjacent cell and the direction angle of the affected adjacent cell, the calculation process is as follows:

1) calculating a distance coefficient: MDT data shows that the number of affected adjacent cells of the cross-area coverage evaluation point A is 1, 590 meters of distance from the cross-area coverage evaluation point to the service cell, 180 meters of distance from the affected adjacent cells and 453 meters of distance between the affected adjacent cells corresponding to the service cell and the cross-area coverage evaluation point can be calculated according to the longitude and latitude of the cross-area coverage evaluation point, the longitude and latitude of the service cell and the longitude and latitude of the affected adjacent cells, and then the distance coefficient is 0.905;

2) calculating an angle coefficient: according to the longitude and latitude of the cross-area coverage evaluation point, the longitude and latitude of the service cell, the direction angle of the service cell, the longitude and latitude of the affected adjacent cell and the direction angle of the affected adjacent cell, the included angle theta between the cross-area coverage evaluation point A and the direction angle of the affected adjacent cell can be calculated_N115 DEG, and an angle theta with the direction of the serving cell_SThe antenna gains of the two cells are respectively inquired at 35 degrees, and the gain difference is calculated

The angle coefficient was further calculated to be 2.239.

3) The final calculated handover coverage coefficients of the 3 handover coverage evaluation points are as follows:

O_A＝2.026

O_B＝0.134

O_C0 (the number of affected neighbors of the handover coverage assessment point is 0)

The result of the handover coverage possibility of the handover coverage evaluation point judged by the handover coverage coefficient is: the handover coverage evaluation point a > handover coverage evaluation point B > handover coverage evaluation point C.

Thus, in the embodiment, by acquiring MDT data including latitude and longitude information of sampling points reported at each sampling point in a serving cell, acquiring at least one handover coverage evaluation point and at least one affected neighboring cell corresponding to each handover coverage evaluation point from a plurality of sampling points, then determining a handover coverage coefficient of each handover coverage evaluation point according to the cell information of the serving cell, the cell information of the at least one affected neighboring cell corresponding to each handover coverage evaluation point and the latitude and longitude information of the at least one handover coverage evaluation point, and finally evaluating the handover coverage of the serving cell according to the handover coverage coefficient of each handover coverage evaluation point, handover coverage analysis based on the MDT data is realized, the handover coverage coefficient of each handover coverage evaluation point is obtained through a large amount of sampling point data based on the MDT data including accurate latitude and longitude information of the sampling points, therefore, the cross-region coverage possibility of the service cell at each cross-region coverage evaluation point is accurately reflected, and the efficiency and the accuracy of the cross-region coverage evaluation are improved.

Fig. 2 is a block diagram of a device for evaluating handoff coverage according to an embodiment of the present invention, which comprises:

a first obtaining module 201, configured to obtain cell information of a serving cell, cell information of a neighboring cell of the serving cell, and minimization path MDT data reported at each of a plurality of sampling points in the serving cell, where the MDT data includes latitude and longitude information of the sampling point;

a second obtaining module 202, configured to obtain at least one handover coverage evaluation point from multiple sampling points according to the cell information of the serving cell, the cell information of the neighboring cell, and longitude and latitude information of each of the multiple sampling points;

a third obtaining module 203, configured to obtain at least one affected neighboring cell corresponding to each handover coverage evaluation point from neighboring cells of the serving cell;

a determining module 204, configured to determine a handover coefficient of each handover evaluation point according to the cell information of the serving cell, the cell information of at least one affected neighboring cell corresponding to each handover evaluation point, and the longitude and latitude information of at least one handover evaluation point;

an evaluation module 205 is configured to evaluate the handover coverage of the serving cell according to the handover coverage coefficient of each handover coverage evaluation point.

Optionally, the cell information of the serving cell includes longitude and latitude information and direction angle information of the serving cell, and the cell information of the neighboring cell includes longitude and latitude information and direction angle information of the neighboring cell.

Optionally, the second obtaining module 202 includes:

the first acquisition unit is used for acquiring the distance from the sampling point to the service cell and the distance from the sampling point to each adjacent cell according to the longitude and latitude information of the sampling point, the longitude and latitude information of the service cell and the longitude and latitude information of each adjacent cell; when the distance from the sampling point to the service cell is detected to be larger than the distance from the sampling point to at least one adjacent cell of the service cell, determining the sampling point as a cross-area coverage evaluation point;

alternatively, the first and second electrodes may be,

the second acquisition unit is used for acquiring an included angle between the sampling point and the azimuth of the service cell and an included angle between the sampling point and the azimuth of each adjacent cell according to the longitude and latitude information of the sampling point, the longitude and latitude information and the direction angle information of the service cell and the longitude and latitude information and the direction angle information of each adjacent cell; and when detecting that the included angle of the azimuth angle between the sampling point and the serving cell is larger than the included angle of the azimuth angle between the sampling point and at least one adjacent cell of the serving cell, determining the sampling point as a cross-area coverage evaluation point.

Optionally, the third obtaining module 203 includes:

a third obtaining unit, configured to obtain a reference signal received power, RSRP, at the handover coverage evaluation point of the serving cell reported at each handover coverage evaluation point and an RSRP, at the handover coverage evaluation point of each neighbor cell of the serving cell;

a calculating unit, configured to calculate, for each handover coverage evaluation point and each neighboring cell, a difference between an RSRP of the neighboring cell at the handover coverage evaluation point and an RSRP of the serving cell at the handover coverage evaluation point according to an RSRP of the serving cell at the handover coverage evaluation point reported by the handover coverage evaluation point and the RSRP of the neighboring cell at the handover coverage evaluation point; and when the difference is detected to be larger than a preset threshold value, determining the adjacent cell as an affected adjacent cell corresponding to the handover coverage evaluation point.

Optionally, the determining module 204 includes:

a fourth obtaining unit, configured to obtain, for each handover coverage evaluation point, a distance coefficient of the handover coverage evaluation point according to the longitude and latitude information of the serving cell, the longitude and latitude information of each affected neighboring cell corresponding to the handover coverage evaluation point, and the longitude and latitude information of the handover coverage evaluation point;

a fifth obtaining unit, configured to obtain an angle coefficient of the handover coverage evaluation point according to the longitude and latitude information and the direction angle information of the serving cell, the longitude and latitude information and the direction angle information of each affected neighboring cell corresponding to the handover coverage evaluation point, and the longitude and latitude information of the handover coverage evaluation point;

and the determining unit is used for determining the cross-region coverage coefficient of the cross-region coverage evaluation point according to the distance coefficient and the angle coefficient of the cross-region coverage evaluation point.

Optionally, the fourth obtaining unit is configured to obtain a distance coefficient of the handover coverage evaluation point according to the longitude and latitude information of the serving cell, the longitude and latitude information of each affected neighboring cell corresponding to the handover coverage evaluation point, and the longitude and latitude information of the handover coverage evaluation point by using the following formula;

wherein the content of the first and second substances,

representing the mean value of the distances from the service cell to all the affected adjacent cells corresponding to the cross-area coverage evaluation point j, which is obtained by calculation according to the longitude and latitude information of the service cell and the longitude and latitude information of all the affected adjacent cells corresponding to the cross-area coverage evaluation point j;

the fifth obtaining unit is used for calculating an angle coefficient of the cross-area coverage evaluation point according to the longitude and latitude information and the direction angle information of the serving cell, the longitude and latitude information and the direction angle information of each affected adjacent cell corresponding to the cross-area coverage evaluation point and the longitude and latitude information of the cross-area coverage evaluation point by the following formula;

wherein the content of the first and second substances,

representing the included angle of the azimuth angle of the cross-area coverage evaluation point j and the affected adjacent cell i obtained by calculation according to the longitude and latitude information of the cross-area coverage evaluation point j, the longitude and latitude information and the direction angle information of the affected adjacent cell i corresponding to the cross-area coverage evaluation point j; theta_jExpress according toCalculating an included angle between the cross-area coverage evaluation point j and the azimuth angle of the service cell according to the longitude and latitude information of the cross-area coverage evaluation point j and the longitude and latitude information and the azimuth angle information of the service cell;

indicating included angle

The corresponding antenna gain;

represents the angle theta_jThe corresponding antenna gain;

the determining unit is used for determining the cross-region coverage coefficient of the cross-region coverage evaluation point according to the distance coefficient and the angle coefficient of the cross-region coverage evaluation point by the following formula:

Optionally, the evaluation module is configured to calculate a mean value of the handover coefficients of all the handover evaluation points according to the handover coefficients of each handover evaluation point, and determine the mean value of the handover coefficients of all the handover evaluation points as the handover evaluation coefficient of the serving cell; and evaluating the handover coverage of the serving cell according to the handover coverage evaluation coefficient of the serving cell.

The device for evaluating the handover coverage provided by this embodiment obtains MDT data including latitude and longitude information of sampling points reported at each sampling point in a serving cell, obtains at least one handover coverage evaluation point and at least one affected neighboring cell corresponding to each handover coverage evaluation point from a plurality of sampling points, determines a handover coverage coefficient of each handover coverage evaluation point according to the cell information of the serving cell, the cell information of the at least one affected neighboring cell corresponding to each handover coverage evaluation point, and the latitude and longitude information of the at least one handover coverage evaluation point, and finally evaluates the handover coverage of the serving cell according to the handover coverage coefficient of each handover coverage evaluation point, thereby implementing the handover coverage analysis based on the MDT data, including accurate latitude and longitude information of the sampling points based on the MDT data, implementing a large amount of sampling point data, and obtaining the cross-region coverage coefficient of each cross-region coverage evaluation point, thereby accurately reflecting the cross-region coverage possibility of the service cell at each cross-region coverage evaluation point and improving the efficiency and the accuracy in the cross-region coverage evaluation.

In addition, as shown in fig. 3, an entity structure schematic diagram of the electronic device provided in the embodiment of the present invention is shown, where the electronic device may include: a processor (processor)310, a communication Interface (communication Interface)320, a memory (memory)330 and a communication bus 340, wherein the processor 310, the communication Interface 320 and the memory 330 communicate with each other via the communication bus 340. The processor 310 may invoke a computer program stored on the memory 330 and executable on the processor 310 to perform the methods provided by the various embodiments described above, including, for example: acquiring cell information of a serving cell, cell information of a neighboring cell of the serving cell and MDT data of a minimized path reported by each sampling point in a plurality of sampling points in the serving cell, wherein the MDT data comprises longitude and latitude information of the sampling points; acquiring at least one cross-area coverage evaluation point from a plurality of sampling points according to the cell information of the serving cell, the cell information of the adjacent cell and the longitude and latitude information of each sampling point in the plurality of sampling points; acquiring at least one affected adjacent cell corresponding to each cross-area coverage evaluation point from the adjacent cells of the service cell; determining a cross-area coverage coefficient of each cross-area coverage evaluation point according to the cell information of the service cell, the cell information of at least one affected adjacent cell corresponding to each cross-area coverage evaluation point and the longitude and latitude information of at least one cross-area coverage evaluation point; and evaluating the handover coverage of the service cell according to the handover coverage coefficient of each handover coverage evaluation point.

In addition, the logic instructions in the memory 330 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the method provided in the foregoing embodiments when executed by a processor, and the method includes: acquiring cell information of a serving cell, cell information of a neighboring cell of the serving cell and MDT data of a minimized path reported by each sampling point in a plurality of sampling points in the serving cell, wherein the MDT data comprises longitude and latitude information of the sampling points; acquiring at least one cross-area coverage evaluation point from a plurality of sampling points according to the cell information of the serving cell, the cell information of the adjacent cell and the longitude and latitude information of each sampling point in the plurality of sampling points; acquiring at least one affected adjacent cell corresponding to each cross-area coverage evaluation point from the adjacent cells of the service cell; determining a cross-area coverage coefficient of each cross-area coverage evaluation point according to the cell information of the service cell, the cell information of at least one affected adjacent cell corresponding to each cross-area coverage evaluation point and the longitude and latitude information of at least one cross-area coverage evaluation point; and evaluating the handover coverage of the service cell according to the handover coverage coefficient of each handover coverage evaluation point.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for evaluating coverage, the method comprising:

acquiring at least one affected adjacent cell corresponding to each cross-area coverage evaluation point from the adjacent cells of the service cell; the affected neighbor cell refers to a cell in which the neighbor cell at the handover coverage evaluation point affects the serving cell;

evaluating the cross-region coverage of the service cell according to the cross-region coverage coefficient of each cross-region coverage evaluation point;

the cell information of the service cell comprises longitude and latitude information and direction angle information of the service cell, and the cell information of the adjacent cell comprises longitude and latitude information and direction angle information of the adjacent cell;

the determining the handover coverage coefficient of each handover coverage evaluation point according to the cell information of the serving cell, the cell information of at least one affected neighboring cell corresponding to each handover coverage evaluation point, and the longitude and latitude information of at least one handover coverage evaluation point includes:

aiming at each cross-area coverage evaluation point, acquiring a distance coefficient of the cross-area coverage evaluation point according to the longitude and latitude information of a service cell, the longitude and latitude information of each affected adjacent cell corresponding to the cross-area coverage evaluation point and the longitude and latitude information of the cross-area coverage evaluation point;

acquiring an angle coefficient of the cross-area coverage evaluation point according to the longitude and latitude information and the direction angle information of the service cell, the longitude and latitude information and the direction angle information of each affected adjacent cell corresponding to the cross-area coverage evaluation point and the longitude and latitude information of the cross-area coverage evaluation point;

determining a cross-region coverage coefficient of the cross-region coverage evaluation point according to the distance coefficient and the angle coefficient of the cross-region coverage evaluation point;

the step of acquiring the distance coefficient of each cross-area coverage evaluation point according to the longitude and latitude information of the service cell, the longitude and latitude information of each affected adjacent cell corresponding to the cross-area coverage evaluation point and the longitude and latitude information of the cross-area coverage evaluation point comprises the following steps:

acquiring a distance coefficient of the cross-area coverage evaluation point according to the longitude and latitude information of the service cell, the longitude and latitude information of each affected adjacent cell corresponding to the cross-area coverage evaluation point and the longitude and latitude information of the cross-area coverage evaluation point by the following formula;

wherein the content of the first and second substances,

the acquiring the angle coefficient of the handover coverage evaluation point according to the longitude and latitude information and the direction angle information of the serving cell, the longitude and latitude information and the direction angle information of each affected neighboring cell corresponding to the handover coverage evaluation point, and the longitude and latitude information of the handover coverage evaluation point includes:

calculating an angle coefficient of the cross-area coverage evaluation point according to the longitude and latitude information and the direction angle information of the service cell, the longitude and latitude information and the direction angle information of each affected adjacent cell corresponding to the cross-area coverage evaluation point and the longitude and latitude information of the cross-area coverage evaluation point by the following formula;

wherein the content of the first and second substances,

representing the included angle of the azimuth angle of the cross-area coverage evaluation point j and the affected adjacent cell i obtained by calculation according to the longitude and latitude information of the cross-area coverage evaluation point j, the longitude and latitude information and the direction angle information of the affected adjacent cell i corresponding to the cross-area coverage evaluation point j; theta_jRepresenting an included angle between the cross-area coverage evaluation point j and the azimuth of the service cell, which is obtained by calculation according to the longitude and latitude information of the cross-area coverage evaluation point j and the longitude and latitude information and the azimuth information of the service cell;

indicating included angle

The corresponding antenna gain;

represents the angle theta_jThe corresponding antenna gain;

the determining the handover coverage coefficient of the handover coverage evaluation point according to the distance coefficient and the angle coefficient of the handover coverage evaluation point comprises the following steps:

determining a handover cover coefficient of the handover cover evaluation point according to the distance coefficient and the angle coefficient of the handover cover evaluation point by the following formula:

2. The method of claim 1, wherein obtaining at least one handover coverage assessment point from a plurality of sampling points according to the cell information of the serving cell, the cell information of the neighboring cell, and the longitude and latitude information of each of the plurality of sampling points comprises:

aiming at each sampling point, acquiring the distance from the sampling point to a service cell and the distance from the sampling point to each adjacent cell according to the longitude and latitude information of the sampling point, the longitude and latitude information of the service cell and the longitude and latitude information of each adjacent cell; wherein the content of the first and second substances,

when the distance from the sampling point to the service cell is detected to be larger than the distance from the sampling point to at least one adjacent cell of the service cell, determining the sampling point as a cross-area coverage evaluation point;

alternatively, the first and second electrodes may be,

aiming at each sampling point, acquiring an included angle of an azimuth angle of the sampling point and the serving cell and an included angle of the azimuth angle of the sampling point and each adjacent cell according to longitude and latitude information of the sampling point, longitude and latitude information and direction angle information of the serving cell and longitude and latitude information and direction angle information of each adjacent cell; wherein the content of the first and second substances,

and when detecting that the included angle of the azimuth angle between the sampling point and the serving cell is larger than the included angle of the azimuth angle between the sampling point and at least one adjacent cell of the serving cell, determining the sampling point as a cross-area coverage evaluation point.

3. The method of claim 1, wherein the obtaining at least one affected neighbor cell corresponding to each handover coverage evaluation point from the neighbor cells of the serving cell comprises:

acquiring Reference Signal Received Power (RSRP) of a serving cell at the handover coverage evaluation point reported by each handover coverage evaluation point and RSRP of each neighbor cell of the serving cell at the handover coverage evaluation point;

calculating the difference value of the RSRP of the neighbor cell at the handover coverage evaluation point and the RSRP of the serving cell at the handover coverage evaluation point according to the RSRP of the serving cell at the handover coverage evaluation point reported by the handover coverage evaluation point and the RSRP of the neighbor cell at the handover coverage evaluation point; wherein the content of the first and second substances,

and when the difference is detected to be larger than a preset threshold value, determining the adjacent cell as an affected adjacent cell corresponding to the cross-area coverage evaluation point.

4. The method of claim 1, wherein the evaluating the cell's handoff coverage based on the handoff coverage factor for each handoff coverage evaluation point comprises:

calculating the mean value of the cross-region coverage coefficients of all the cross-region coverage evaluation points according to the cross-region coverage coefficient of each cross-region coverage evaluation point, and determining the mean value of the cross-region coverage coefficients of all the cross-region coverage evaluation points as the cross-region coverage evaluation coefficient of the service cell;

and evaluating the handover coverage of the serving cell according to the handover coverage evaluation coefficient of the serving cell.

5. A handoff coverage assessment apparatus, said apparatus comprising:

a third obtaining module, configured to obtain at least one affected neighbor cell corresponding to each handover coverage evaluation point from the neighbor cells of the serving cell; the affected neighbor cell refers to a cell in which the neighbor cell at the handover coverage evaluation point affects the serving cell;

the evaluation module is used for evaluating the cross-region coverage of the service cell according to the cross-region coverage coefficient of each cross-region coverage evaluation point;

wherein the content of the first and second substances,

wherein the content of the first and second substances,

indicating included angle

The corresponding antenna gain;

represents the angle theta_jThe corresponding antenna gain;

6. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the handover coverage assessment method according to any of claims 1 to 4 when executing the computer program.

7. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor performs the steps of the method of handover coverage assessment according to any of claims 1 to 4.