CN110430596B - Quality evaluation method and device for wireless signal coverage area and readable storage medium - Google Patents
Quality evaluation method and device for wireless signal coverage area and readable storage medium Download PDFInfo
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Abstract
The quality evaluation method, the quality evaluation device and the readable storage medium of the wireless signal coverage area provided by the invention are characterized in that measurement reports obtained by measuring each terminal in the wireless signal coverage area of the service cell of each base station are obtained, the sampling data of the measurement sampling points of each service cell are determined according to each measurement report, and whether the measurement sampling points are hyper-penetration sampling points or hyper-refraction sampling points is judged according to the signal level intensity of the measurement sampling points; the quality of a wireless signal coverage area of each service cell is determined according to the ratio of the super-penetration sampling points or the super-refraction sampling in each service cell to the total measurement sampling points in the corresponding service cell and the number of the super-penetration sampling points or the super-refraction sampling, so that the quality of the wireless signal coverage area of the service cell providing wireless signal service for the terminal is evaluated based on the obtained measurement report of the terminal.
Description
Technical Field
The present invention relates to computer technologies, and in particular, to a method and an apparatus for evaluating quality of a wireless signal coverage area, and a readable storage medium.
Background
The inside of buildings in urban areas or county cities or between dense buildings is a concentrated area for users of mobile communication, and because of the high occurrence of the penetration loss and the breakage in these areas, how to effectively distinguish the areas where the penetration loss and the breakage occur by operators to provide good wireless signals for users in these problem areas becomes a problem.
In the prior art, in order to determine whether a super-penetration area or a super-refraction area exists in a signal coverage area, a technician carries a Test device to a field to perform a Test to find a weak coverage area of the signal coverage area, which is one of feasible schemes, such as a Drive Test (DT) or a Call Quality Test (CQT).
However, the method of using technicians to carry test equipment to the site to test the signal coverage area usually consumes a lot of manpower and material resources, and cannot realize the whole network investigation.
Disclosure of Invention
In view of the above-mentioned technical problems, the present invention provides a method, an apparatus and a readable storage medium for quality assessment of a wireless signal coverage area.
In a first aspect, the present invention provides a method for evaluating quality of a wireless signal coverage area, including:
acquiring measurement reports obtained by measuring each terminal in a wireless signal coverage area of a service cell of each base station, and determining sampling data of measurement sampling points of each service cell according to each measurement report, wherein the sampling data comprises signal level intensity;
judging whether the measuring sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level intensity of the measuring sampling point;
and determining the quality of the wireless signal coverage area of each service cell according to the ratio of the super-penetration sampling points or super-refraction sampling points in each service cell to the total measurement sampling points in the corresponding service cell and the number of the super-penetration sampling points or super-refraction sampling points.
Optionally, the sampling data further includes a baseband device transmission power of the base station, a gain of a serving cell transmitting antenna, a gain of a terminal receiving antenna, a feeder loss of the base station, and a signal propagation distance;
according to the signal level intensity of the survey sampling point, whether the survey sampling point is a super-penetration loss sampling point is judged, including:
determining the propagation loss between the terminal and the corresponding service cell according to the propagation distance;
and judging whether the measurement sampling point is a super-penetration loss sampling point or not according to the base band equipment transmitting power of the base station, the gain of a transmitting antenna of a service cell, the gain of a receiving antenna of a terminal, the feeder loss, the propagation loss and the signal level strength of the base station.
Optionally, the determining the propagation loss between the terminal and the corresponding serving cell according to the propagation distance includes:
calculating the propagation loss using equation (1), the equation (1) being
Wherein, L is TA Is the propagation loss between the terminal and the corresponding serving cell; TA is an index value of signal propagation distance, S TA A signal propagation distance for a signal to propagate from a serving cell to a terminal; f is the signal frequency.
Optionally, the determining, according to the base band device transmitting power of the base station, the gain of the transmitting antenna of the serving cell, the gain of the receiving antenna of the terminal, the feeder loss, the propagation loss, and the signal level strength of the base station, whether the measurement sampling point is a super-penetration-loss sampling point includes:
judging whether the measurement sampling point is a super-penetration loss sampling point or not by using a formula (2), wherein the formula (2) is
P r <P t +G t +G r -L t -L TA -H 1 ；
Wherein, the P r Measuring the signal level intensity of a sampling point; said P is t Transmitting power for a base band device of a base station; the G is t Gain of the transmitting antenna for the serving cell; the G is r Gain of a receiving antenna for a terminal; l is a radical of an alcohol t Is the feeder loss of the base station; said L TA Is the propagation loss between the terminal and the corresponding serving cell; said H 1 Is a first hysteresis threshold.
Optionally, the sampling data further includes the height of the serving cell antenna and the maximum coverage distance of the serving cell;
correspondingly, according to the signal level intensity of the measurement sampling point, whether the measurement sampling point is a super-refraction sampling point is judged, including:
determining the propagation loss between the terminal and the corresponding service cell according to the propagation distance;
determining the space loss at the maximum coverage distance of the serving cell according to the height of the antenna of the serving cell and the maximum coverage distance of the serving cell;
and judging whether the measurement sampling point is a super-refraction sampling point or not according to the propagation loss and the space loss.
Optionally, the determining the spatial loss at the maximum coverage distance of the serving cell according to the height of the antenna of the serving cell and the maximum coverage distance of the serving cell includes:
determining the space loss at the maximum coverage distance of the serving cell by using the formula (3), wherein the formula (3) is
Wherein, L is MAX Determining the space loss at the maximum coverage distance of the serving cell for the maximum coverage distance of the serving cell; f is the signal frequency; said S MAX The maximum coverage distance of the serving cell; said S An Is the height of the serving cell antenna.
Optionally, the maximum coverage distance of the serving cell is determined by using a half of a distance of a farthest neighboring cell in which the serving cell in the measurement report has a handover relationship and satisfies condition 1 or condition 2;
the condition 1 is that the switching times of a serving cell and a neighboring cell are greater than a first parameter within a preset first time period t 1; the condition 2 is that the ratio of the switching frequency of the serving cell and one neighboring cell to the total switching frequency of the main serving cell and all neighboring cells is greater than a second parameter within a preset second time period t 2.
Optionally, the determining whether the measurement sampling point is a super-refraction sampling point according to the propagation loss and the spatial loss includes:
judging whether the measurement sampling point is a super-refraction sampling point or not by using a formula (4), wherein the formula (4) is L TA >L MAX +H 2 ；
Wherein, L is TA For propagation loss between terminal and corresponding serving cell；L MAX Determining the space loss at the maximum coverage distance of the serving cell for the maximum coverage distance of the serving cell; said H 2 Is the second hysteresis threshold.
Optionally, before judging whether the measurement sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level strength of the measurement sampling point, the method further includes:
and screening each measurement sampling point according to a preset signal level intensity threshold value so that the signal level intensity of the reserved measurement sampling point is smaller than the signal level intensity threshold value, and the reserved measurement sampling point is used as the measurement sampling point to judge whether the reserved measurement sampling point is a super-penetration sampling point or a super-refraction sampling point.
Optionally, the method for evaluating the quality of the coverage area of the wireless signal further includes:
and determining the base station deployment strategy of each base station service cell according to the quality of the wireless signal coverage area of each base station service cell.
In a second aspect, the present invention provides an apparatus for evaluating quality of a coverage area of a wireless signal, including:
the system comprises a data acquisition module, a data acquisition module and a data processing module, wherein the data acquisition module is used for acquiring measurement reports obtained by measuring each terminal in a wireless signal coverage area of a service cell of each base station and determining sampling data of measurement sampling points of each service cell according to each measurement report, and the sampling data comprises signal level intensity;
the first processing module is used for judging whether the measurement sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level intensity of the measurement sampling point;
and the second processing module is used for determining the quality of the wireless signal coverage area of each service cell according to the ratio of the super-penetration sampling points or the super-refraction sampling in each service cell to the total measurement sampling points in the corresponding service cell and the number of the super-penetration sampling points or the super-refraction sampling.
In a third aspect, the present invention provides an apparatus for evaluating quality of a wireless signal coverage area, including: a memory, a processor, and a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any one of the preceding claims.
In a fourth aspect, the invention provides a readable storage medium having stored thereon a computer program for execution by a process to perform the method of any preceding claim.
The quality evaluation method, the quality evaluation device and the readable storage medium of the wireless signal coverage area provided by the invention are characterized in that measurement reports obtained by measuring each terminal in the wireless signal coverage area of the service cell of each base station are obtained, and the sampling data of the measurement sampling points of each service cell are determined according to each measurement report, wherein the sampling data comprises signal level intensity; judging whether the measurement sampling point is a super-penetration loss sampling point or a super-refraction sampling point according to the signal level intensity of the measurement sampling point; the quality of the wireless signal coverage area of each service cell is determined according to the ratio of the super-penetration sampling point or the super-refraction sampling point in each service cell to the total measurement sampling point in the corresponding service cell, so that the quality of the wireless signal coverage area of the service cell providing wireless signal service for the terminal is evaluated based on the acquired measurement report of the terminal.
Drawings
FIG. 1 is a schematic diagram of a network architecture on which the present invention is based;
fig. 2 is a flowchart illustrating a method for evaluating quality of a wireless signal coverage area according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for evaluating quality of a wireless signal coverage area according to a second embodiment of the present invention;
fig. 4 is a flowchart illustrating another method for evaluating quality of a wireless signal coverage area according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for quality estimation of a wireless signal coverage area according to a third embodiment of the present invention;
fig. 6 is a schematic hardware structure diagram of a quality evaluation apparatus for a wireless signal coverage area according to a fourth 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.
The inside of buildings in urban areas or county cities or between dense buildings is a concentrated area for users of mobile communication, and because of the high occurrence of the penetration loss and the breakage in these areas, how to effectively distinguish the areas where the penetration loss and the breakage occur by operators to provide good wireless signals for users in these problem areas becomes a problem.
In the prior art, in order to determine whether a super-damaged area or a super-refractive area exists in a signal coverage area, a technician carries a Test device to a field Test to find a weak coverage area of the signal coverage area, which is one of feasible schemes, such as a Drive Test (DT) or a Call Quality Test (CQT).
However, the method of using technicians to carry test equipment to arrive at the site to test the signal coverage area usually consumes a lot of manpower and material resources, and cannot implement the whole network troubleshooting.
In view of the above problems, the present invention provides a method, an apparatus and a readable storage medium for evaluating the quality of a wireless signal coverage area.
Fig. 1 is a schematic diagram of a network architecture based on the present invention, and as shown in fig. 1, the network architecture based on the present invention may include a quality evaluation device 1 of a wireless signal coverage area, a base station cluster 2, and a terminal cluster 3.
In some examples, the quality evaluation device 1 of the wireless signal coverage area is integrated with the base station cluster 2, and data interaction can be performed through a network.
The base station cluster 2 may be specifically configured to provide communication services, that is, a server or a server group of wireless signals, for each terminal in the terminal cluster 3; the terminal cluster 3 may include a plurality of terminal devices of a plurality of users, and the terminal devices include, but are not limited to, a smart phone and a tablet computer.
Fig. 2 is a flowchart illustrating a method for evaluating quality of a wireless signal coverage area according to an embodiment of the present invention, and as shown in fig. 2, the method for evaluating quality of a wireless signal coverage area includes:
wherein the sampled data comprises signal level strengths;
102, judging whether the measurement sampling point is a super-penetration loss sampling point or a super-refraction sampling point according to the signal level intensity of the measurement sampling point;
and 103, determining the quality of the wireless signal coverage area of each service cell according to the ratio of the super-penetration sampling points or super-refraction sampling points in each service cell to the total measurement sampling points in the corresponding service cell and the number of the super-penetration sampling points or super-refraction sampling points.
It should be noted that the main body for executing the method for evaluating the quality of the wireless signal coverage area provided by the present invention may be specifically the quality evaluation apparatus of the wireless signal coverage area shown in fig. 1.
The method and the device effectively evaluate the quality of the wireless signal coverage area by counting and measuring the ratio of the super-penetration sampling point to the super-refraction sampling point in the sampling points. In the field of communication systems, the super-penetration problem and the super-refraction problem of signals are often concurrent, that is, the number and the proportion of super-penetration sampling points and super-refraction sampling points are often more or less simultaneously, but the situation that one kind of sampling points is more in number and proportion and the other kind of sampling points is lower in number and proportion is not excluded. For example, when an outdoor macro base station covers a building with a single reinforced concrete structure, the number and the proportion of the super-penetration sampling points are large, and the number and the proportion of the super-refraction sampling points are small; when the user is in the open space between certain buildings in a dense residential building cell, the number and the occupation ratio of the super-refraction sampling points are high, and the number and the occupation ratio of the super-penetration sampling points are low.
Specifically, first, the quality evaluation device of the wireless signal coverage area may acquire measurement reports obtained by measuring each terminal in the wireless signal coverage area of the serving cell of each base station, and determine sampling data of measurement sampling points of each serving cell according to each measurement report. Wherein the sampled data includes signal level strength.
Further, the measurement report is acquired by the terminal periodically and uploaded to the base station cluster, and particularly, the periodic measurement report is acquired for any wireless signal coverage area where the terminal is located, so that the condition of signal coverage of the wireless signal coverage area can be reflected more objectively than the event measurement report.
And then, the quality evaluation device of the wireless signal coverage area judges whether the measurement sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level intensity of the measurement sampling point.
The super-penetration sampling point and the super-refraction sampling point generally refer to a measurement sampling point in which sampling data meets a specific condition, wherein whether the measurement sampling point belongs to at least one of the super-penetration sampling point and the super-refraction sampling point can be determined by combining signal level intensity in the sampling data with working parameters of a serving cell, and of course, the measurement sampling point may meet both the conditions of the super-penetration sampling point and the conditions of the super-refraction sampling point.
And finally, the quality evaluation device of the wireless signal coverage area determines the quality of the wireless signal coverage area of each service cell according to the ratio of the super-penetration sampling point or the super-refraction sampling in each service cell to the total measurement sampling point in the corresponding service cell and the number of the super-penetration sampling points or the super-refraction sampling.
Specifically, in order to specifically evaluate the quality of the wireless signal coverage area of the server cell, the present disclosure lists several situations of a super-puncture sampling point or a super-refraction sampling point of the server cell when the quality of the wireless signal coverage area is not good:
case 1: the number of the super-penetration loss sampling points is more than or equal to N1;
case 2: (the number of super-penetration sampling points is divided by the number of total sampling points). Times.100% is more than or equal to P1;
case 3: the number of the super-refraction sampling points is more than or equal to N2;
case 4: (the number of super refraction sampling points is divided by the number of total sampling points) multiplied by 100% is more than or equal to P2;
where N1, P1, N2, P2 are different thresholds, respectively, which may be set by the technician according to experience.
If one of 4 conditions is met in one cell, base station or area, the indoor and outdoor cooperation problem is considered to affect the perception of users, and a supplementary cell or a small micro station needs to be considered; if indoor districts or small micro-stations are already deployed in the area, whether the base station fault affects the coverage capability needs to be checked. Of course, in order to ensure the accuracy of problem diagnosis and protect the investment of operators, any combination of 4 cases can be used. For example, if case 2 and case 4 are satisfied simultaneously (case 1 and case 3 are not necessarily satisfied), a station repair or a fault elimination is considered; for example, in the case of satisfying both case 1 and case 3 (case 2 and case 4 are not necessarily satisfied), this indicates that in a cell, a base station, or an area, the number of affected users is large, or the affected time of the users is long, because the present invention uses a periodic measurement report for calculation, although the measurement report may originate from different users and different time instants, because of the periodically collected measurement report, such an increase in the number of measurement reports represents more users, and the probability of being affected in a longer time dimension is greatly increased, that is, even though case 2 and case 4 are not necessarily satisfied, it should be emphasized that corresponding actions are taken.
That is, the base station deployment strategy of each base station serving cell is determined according to the quality of the wireless signal coverage area of each base station serving cell.
The problem of the super-penetration is not necessarily caused indoors, and the problem of the super-refraction is not necessarily caused outdoors. The problem of super-penetration loss may also occur in outdoor environments, such as the situation that a user and a base station are not directly seen and refraction is not good at the same time; super-refraction problems can also occur in indoor environments, such as not completely closed buildings or windows opened by users, and good refraction and scattering conditions around buildings. Therefore, when the network condition is found to meet a plurality of the 4 conditions, specific problem specific analysis is certainly needed, and the invention lists the 4 conditions, so as to fully reflect the actual condition of the network and reduce the possibility of problem omission.
The quality evaluation method of the wireless signal coverage area provided by the invention comprises the steps of obtaining measurement reports obtained by measuring each terminal in the wireless signal coverage area of the service cell of each base station, and determining the sampling data of measurement sampling points of each service cell according to each measurement report, wherein the sampling data comprises signal level intensity; judging whether the measuring sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level intensity of the measuring sampling point; the quality of a wireless signal coverage area of each service cell is determined according to the ratio of the super-penetration sampling points or the super-refraction sampling in each service cell to the total measurement sampling points in the corresponding service cell and the number of the super-penetration sampling points or the super-refraction sampling, so that the quality of the wireless signal coverage area of the service cell providing wireless signal service for the terminal is evaluated based on the obtained measurement report of the terminal.
Based on the foregoing embodiments, fig. 3 is a flowchart illustrating a method for evaluating quality of a wireless signal coverage area according to a second embodiment of the present invention, as shown in fig. 3, the method for evaluating quality of a wireless signal coverage area includes:
the sampling data comprises signal level intensity, base band equipment transmitting power of a base station, gain of a transmitting antenna of a service cell, gain of a receiving antenna of a terminal, feeder loss of the base station, signal propagation distance, height of an antenna of the service cell and maximum coverage distance of the service cell;
and step 206, judging whether the measurement sampling point is a super-refraction sampling point or not according to the propagation loss and the space loss.
And step 207, determining the quality of the wireless signal coverage area of each service cell according to the ratio of the super-penetration sampling points or super-refraction sampling in each service cell to the total measurement sampling points in the corresponding service cell and the number of the super-penetration sampling points or super-refraction sampling.
It should be noted that the main execution body of the quality evaluation method for a wireless signal coverage area provided by the present invention may specifically be the quality evaluation device for a wireless signal coverage area shown in fig. 1.
Specifically, similarly to the foregoing embodiment, first, the quality evaluation device of the wireless signal coverage area may acquire measurement reports obtained by measuring in the wireless signal coverage area of the serving cell of each base station by each terminal, and determine sampling data of measurement sampling points of each serving cell according to each measurement report. The sampling data comprises signal level strength, base band equipment transmitting power of a base station, gain of a transmitting antenna of a service cell, gain of a receiving antenna of a terminal, feeder loss of the base station, signal propagation distance, height of an antenna of the service cell and maximum coverage distance of the service cell.
Further, the measurement report is acquired by the terminal periodically and uploaded to the base station cluster, and particularly, the periodic measurement report can be acquired for any wireless signal coverage area where the terminal is located, so that the condition of signal coverage in the wireless signal coverage area can be reflected more objectively than an event measurement report.
And then, the quality evaluation device of the wireless signal coverage area judges whether the measurement sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level intensity of the measurement sampling point.
Unlike the foregoing embodiments, the present embodiment provides a specific determination manner as to whether the measurement sampling point is a super-penetration sampling point or a super-refraction sampling point.
It should be noted that, in this embodiment, steps 202 and 203 provide a determination method for a hyper-penetration sampling point, and steps 204 to 206 provide a determination method for a hyper-refraction sampling point, and the determinations of the two methods may be performed synchronously or asynchronously. In the present embodiment, for convenience of description, the determination on the super-penetration sampling point will be performed first, and then the determination on the super-refraction sampling point will be performed, and in other embodiments, the determination on the super-refraction sampling point may be performed first, and then the determination on the super-penetration sampling point may be performed.
Specifically, in the determination process of the super-penetration loss sampling point, firstly, the propagation loss between the terminal and the corresponding serving cell may be determined according to the propagation distance, and then, whether the measurement sampling point is the super-penetration loss sampling point or not may be determined according to the base band device transmission power of the base station, the gain of the transmitting antenna of the serving cell, the gain of the receiving antenna of the terminal, the feeder loss of the base station, the propagation loss, and the signal level strength.
Further, the propagation loss between the terminal and the corresponding serving cell can be obtained in various ways, and in this embodiment, the propagation loss can be calculated by using formula (1):
wherein, L is TA Is the propagation loss between the terminal and the corresponding serving cell; TA is an index value of signal propagation distance, S TA The signal propagation distance of the signal from the serving cell to the terminal; f is the signal frequency.
In equation (1), TA is generally expressed as an index value of a signal propagation distance in a communication system, and each value represents a distance. Generally, only one TA value in one measurement sampling point represents the distance between the ue and the current serving cell, that is, each TA increment represents an increment of 78 meters, and meanwhile, the distance corresponding to each TA unit may be related to the definition of the index value itself and the type of the mobile communication system.
In the formula (1), L TA Is according to S TA The calculated propagation loss of the wireless signal from the serving cell to the terminal is in dB, and since the propagation paths of the uplink and downlink signals are very similar, it is used to represent the propagation loss between the terminal and the corresponding serving cell in this embodiment.
In addition, to the baseband equipment transmitting power according to the base station, the gain of serving cell transmitting antenna, the gain of terminal receiving antenna, the feeder loss of base station, propagation loss and signal level intensity, the mode of judging whether the measurement sampling point is the super-penetration loss sampling point also can be multiple, and in this embodiment, formula (2) can be utilized to judge whether the measurement sampling point is the super-penetration loss sampling point:
P r <P t +G t +G r -L t -L TA -H 1 formula (2)
Wherein, P r In order to measure the signal level strength of the sampling point, the unit is dBm;
P t the unit is dBm which is the emission power of the baseband equipment of the base station;
G t to a serving cellGain of the transmitting antenna, unit dBi;
G r the unit is dB for the gain of the receiving antenna of the terminal; wherein, because the gain of the terminal receiving antenna is different according to the terminal, a fixed value, such as 3dBi, can be adopted during calculation;
L t the unit is the feeder loss of the base station, which is dB;
L TA the propagation loss between the terminal and the corresponding serving cell can be obtained by formula (1);
H 1 the first hysteresis threshold represents an empirically set hysteresis threshold for increasing a guard interval and improving the accuracy of the calculation of the super-penetration sampling point.
Specifically, in the process of judging the super-refraction sampling point, firstly, the propagation loss between the terminal and the corresponding service cell is determined according to the propagation distance; determining the space loss at the maximum coverage distance of the serving cell according to the height of the antenna of the serving cell and the maximum coverage distance of the serving cell; and judging whether the measurement sampling point is a super-refraction sampling point or not according to the propagation loss and the space loss.
Further, the propagation loss between the terminal and the corresponding serving cell can be calculated by the aforementioned formula (1).
Meanwhile, there are various ways to determine the spatial loss at the maximum coverage distance of the serving cell according to the height of the antenna of the serving cell and the maximum coverage distance of the serving cell, and in this embodiment, the spatial loss at the maximum coverage distance of the serving cell can be determined by using formula (3):
wherein L is MAX Determining the space loss at the maximum coverage distance of the serving cell for the maximum coverage distance of the serving cell, wherein f is the signal frequency;
S MAX is the maximum coverage distance, S, of the serving cell An In order for the height of the antenna of the serving cell,
the space straight-line distance from the antenna of the serving cell to the terminal is approximately calculated by utilizing the pythagorean theorem.
Specifically, S MAX The maximum coverage distance of the serving cell according to the planning and actual network deployment conditions is shown, and the maximum coverage distance may be determined by using a plurality of calculation methods.
Condition 1: in the time period of t1, the switching times of the serving cell and a neighboring cell are greater than a first parameter;
condition 2: in a time period t2, dividing the switching times of the serving cell and one neighbor cell by the total switching times of the main serving cell and all neighbor cells multiplied by 100% > a second parameter;
generally speaking, the above conditions are only calculated for the neighboring cells of the same frequency, the switching times are also the times of the same frequency switching, all the neighboring cells satisfying both the condition 1 and the condition 2 or only one of the conditions are selected, the inter-site distances between the neighboring cells and the serving cell of the measurement report are calculated, and the above S MAX It is equal to one half of the furthest inter-station spacing. By setting the above conditions 1 and 2, an ultra-far cell having an occasional handover relationship with the serving cell is screened out.
In addition, in the present embodiment, for determining whether the measurement sampling point is a super-refraction sampling point according to the propagation loss and the spatial loss, it can be determined whether the measurement sampling point is a super-refraction sampling point using formula (4):
L TA >L MAX +H 2 formula (4)
Wherein L is TA Is the propagation loss between the terminal and the corresponding serving cell;
L MAX determining the space loss at the maximum coverage distance of the serving cell for the maximum coverage distance of the serving cell;
said H 2 Is the second hysteresis threshold value for the first hysteresis,which represents a hysteresis threshold that can be set empirically for increasing a guard interval and improving the accuracy of the computation of the super-refraction sampling point.
Finally, the quality evaluation device of the wireless signal coverage area determines the quality of the wireless signal coverage area of each serving cell according to the ratio of the super-penetration sampling point or the super-refraction sampling in each serving cell to the total measurement sampling point in the corresponding serving cell and the number of the super-penetration sampling points or the super-refraction sampling.
The quality evaluation method of the wireless signal coverage area provided by the invention comprises the steps of obtaining measurement reports obtained by measuring each terminal in the wireless signal coverage area of the service cell of each base station, and determining the sampling data of measurement sampling points of each service cell according to each measurement report, wherein the sampling data comprises signal level intensity; judging whether the measuring sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level intensity of the measuring sampling point; the quality of the wireless signal coverage area of each service cell is determined according to the ratio of the super-penetration sampling point or the super-refraction sampling point in each service cell to the total measurement sampling point in the corresponding service cell, so that the quality of the wireless signal coverage area of the service cell providing wireless signal service for the terminal is evaluated based on the obtained measurement report of the terminal.
On the basis of the foregoing embodiment, fig. 4 is a flowchart illustrating a quality assessment method for a wireless signal coverage area according to a third embodiment of the present invention, as shown in fig. 4, the quality assessment method for a wireless signal coverage area includes:
301, obtaining measurement reports obtained by measuring each terminal in the wireless signal coverage area of the service cell of each base station, and determining sampling data of measurement sampling points of each service cell according to each measurement report;
the sampling data comprises signal level intensity, base band equipment transmitting power of a base station, gain of a transmitting antenna of a service cell, gain of a receiving antenna of a terminal, feeder loss of the base station, signal propagation distance, height of an antenna of the service cell and maximum coverage distance of the service cell;
and the reserved measurement sampling points are used as measurement sampling points to judge whether the reserved measurement sampling points are super-penetration sampling points or super-refraction sampling points.
and 307, judging whether the measurement sampling point is a super-refraction sampling point or not according to the propagation loss and the space loss.
And 308, determining the quality of the wireless signal coverage area of each service cell according to the ratio of the super-penetration sampling points or super-refraction sampling in each service cell to the total measurement sampling points in the corresponding service cell and the number of the super-penetration sampling points or super-refraction sampling.
It should be noted that the main execution body of the quality evaluation method for a wireless signal coverage area provided by the present invention may specifically be the quality evaluation device for a wireless signal coverage area shown in fig. 1.
Specifically, similar to the foregoing embodiment, first, the quality evaluation device of the wireless signal coverage area may acquire a measurement report obtained by measuring each terminal in the wireless signal coverage area of the serving cell of each base station, and determine the sampling data of the measurement sampling point of each serving cell according to each measurement report. Wherein the sampled data includes signal level strength.
Different from the foregoing embodiment, before the quality evaluation device in the wireless signal coverage area determines whether the measurement sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level strength of the measurement sampling point, the measurement sampling point may be screened in advance to ensure the accuracy of the determination result. Specifically, each measurement sampling point can be screened according to a preset signal level intensity threshold value, so that the signal level intensity of the reserved measurement sampling point is smaller than the signal level intensity threshold value, and the reserved measurement sampling point is used as the measurement sampling point to judge whether the measurement sampling point is a super-penetration sampling point or a super-refraction sampling point. Further, the signal level strength threshold value here is generally a low value, and the unit thereof is dBm. Because the invention aims to determine the quality of a wireless signal coverage area and evaluate the quality, the signal quality is relatively better if the value of the signal level strength is higher, and the signal quality is relatively poorer if the value of the signal level strength is lower. Therefore, the signal level strength threshold value is set, so that the measurement sampling points are screened for subsequent quality evaluation.
And then, judging whether the measurement sampling points are the super-penetration sampling points or the super-refraction sampling points according to the signal level intensity of the measurement sampling points in sequence by adopting the mode as described above.
And finally, determining the quality of the wireless signal coverage area of each service cell according to the ratio of the super-penetration sampling point or the super-refraction sampling point in each service cell to the total measurement sampling point in the corresponding service cell. It should be noted that the total measured sampling points in this step are the sampling points before the screening in step 302, that is, all the measured sampling points that are screened out and retained should be included in the total measured sampling points.
For a specific implementation manner, reference may be made to the foregoing embodiments, which are not described in detail herein.
The quality evaluation method of the wireless signal coverage area provided by the invention comprises the steps of obtaining measurement reports obtained by measuring each terminal in the wireless signal coverage area of the service cell of each base station, and determining the sampling data of measurement sampling points of each service cell according to each measurement report, wherein the sampling data comprises signal level intensity; judging whether the measurement sampling point is a super-penetration loss sampling point or a super-refraction sampling point according to the signal level intensity of the measurement sampling point; the quality of the wireless signal coverage area of each service cell is determined according to the ratio of the super-penetration sampling point or the super-refraction sampling point in each service cell to the total measurement sampling point in the corresponding service cell, so that the quality of the wireless signal coverage area of the service cell providing wireless signal service for the terminal is evaluated based on the obtained measurement report of the terminal.
Fig. 5 is a schematic structural diagram of a quality estimation apparatus for a wireless signal coverage area according to a third embodiment of the present invention, as shown in fig. 5, the quality estimation apparatus for a wireless signal coverage area includes:
a data obtaining module 10, configured to obtain measurement reports obtained by measuring, by each terminal, in a wireless signal coverage area of a serving cell of each base station, and determine, according to each measurement report, sampling data of a measurement sampling point of each serving cell, where the sampling data includes signal level strength;
the first processing module 20 is configured to determine whether a measurement sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level strength of the measurement sampling point;
and the second processing module 30 is configured to determine quality of a wireless signal coverage area of each serving cell according to a ratio of the super-penetration sampling point or the super-refraction sampling in each serving cell to the total measurement sampling point in the corresponding serving cell, and the number of the super-penetration sampling points or the super-refraction sampling.
Optionally, the sampling data further includes a transmission power of a baseband device of the base station, a gain of a transmitting antenna of the serving cell, a gain of a receiving antenna of the terminal, a feeder loss of the base station, and a signal propagation distance;
the first processing module 20 is specifically configured to:
determining the propagation loss between the terminal and the corresponding service cell according to the propagation distance; and judging whether the measurement sampling point is a super-penetration loss sampling point or not according to the transmitting power of the baseband equipment of the base station, the gain of the transmitting antenna of the service cell, the gain of the receiving antenna of the terminal, the feeder loss, the propagation loss and the signal level strength of the base station.
Optionally, the first processing module 20 is specifically configured to;
calculating the propagation loss using equation (1), the equation (1) being
Wherein, L is TA Is the propagation loss between the terminal and the corresponding serving cell; TA is an index value of signal propagation distance, S TA The signal propagation distance of the signal from the serving cell to the terminal; f is the signal frequency.
Optionally, the first processing module 20 is specifically configured to determine whether the measurement sampling point is a super-penetration-loss sampling point by using a formula (2), where the formula (2) is
P r <P t +G t +G r -L t -L TA -H 1 ；
Wherein, the P r Measuring the signal level intensity of a sampling point; the P is t Transmitting power for a base band device of a base station; the G is t A gain of a transmitting antenna for a serving cell; the G is r Gain of a receiving antenna for a terminal; l is a radical of an alcohol t Feeder loss for a base station; said L TA Is the propagation loss between the terminal and the corresponding serving cell; said H 1 Is the first hysteresis threshold.
Optionally, the sampling data further includes the height of the serving cell antenna and the maximum coverage distance of the serving cell;
correspondingly, the first processing module 20 is specifically configured to determine a propagation loss between the terminal and the corresponding serving cell according to the propagation distance; determining the space loss at the maximum coverage distance of the serving cell according to the height of the antenna of the serving cell and the maximum coverage distance of the serving cell; and judging whether the measurement sampling point is a super-refraction sampling point or not according to the propagation loss and the space loss.
Optionally, the first processing module 20 is specifically configured to:
determining the space loss at the maximum coverage distance of the serving cell by using the formula (3), wherein the formula (3) is
Wherein, L is MAX Determining the space loss at the maximum coverage distance of the serving cell for the maximum coverage distance of the serving cell; f is the signal frequency; said S MAX The maximum coverage distance of the serving cell; s is An Is the height of the serving cell antenna.
Optionally, the maximum coverage distance of the serving cell is determined by using a half of the distance of the farthest neighboring cell in the measurement report, where the serving cell has a handover relationship and meets condition 1 or condition 2;
the condition 1 is that within a preset first time period t1, the switching times of a serving cell and a neighboring cell are greater than a first parameter; the condition 2 is that the ratio of the switching frequency of the serving cell and one neighboring cell to the total switching frequency of the main serving cell and all neighboring cells is greater than a second parameter within a preset second time period t 2.
Optionally, the first processing module 20 is specifically configured to determine whether the measurement sampling point is a super-refraction sampling point by using a formula (4), where the formula (4) is L TA >L MAX +H 2 ；
Wherein, L is TA Is the propagation loss between the terminal and the corresponding serving cell; l is MAX Determining the space loss at the maximum coverage distance of the serving cell for the maximum coverage distance of the serving cell; said H 2 Is the second hysteresis threshold.
Optionally, the system further comprises a screening module, wherein the screening module is configured to judge whether the measurement sampling point is a super-penetration sampling point or before the super-refraction sampling point according to the signal level intensity of the measurement sampling point, and screen each measurement sampling point according to a preset signal level intensity threshold value, so that the signal level intensity of the reserved measurement sampling point is smaller than the signal level intensity threshold value.
Optionally, the second processing module 30 is further configured to determine a base station deployment strategy of each base station serving cell according to quality of a wireless signal coverage area of each base station serving cell.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, reference may be made to the corresponding process in the foregoing method embodiment for the specific working process of the system and the corresponding beneficial effect described above, and details are not repeated herein.
The quality evaluation device of the wireless signal coverage area obtains the measurement report obtained by measuring each terminal in the wireless signal coverage area of the service cell of each base station, and determines the sampling data of the measurement sampling point of each service cell according to each measurement report, wherein the sampling data comprises signal level intensity; judging whether the measuring sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level intensity of the measuring sampling point; the quality of the wireless signal coverage area of each service cell is determined according to the ratio of the super-penetration sampling points or super-refraction sampling points in each service cell to the total measurement sampling points in the corresponding service cell and the number of the super-penetration sampling points or super-refraction sampling points, so that the quality of the wireless signal coverage area of the service cell providing wireless signal service for the terminal is evaluated based on the obtained measurement report of the terminal.
Fig. 6 is a schematic hardware structure diagram of a quality evaluation apparatus for a wireless signal coverage area according to a fourth embodiment of the present invention; as shown in fig. 6, the quality evaluation apparatus for a wireless signal coverage area includes:
a memory 41, a processor 42 and a computer program stored on the memory 41 and executable on the processor 42, the processor 42 executing the method of the above embodiment when executing the computer program.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, reference may be made to the corresponding process in the foregoing method embodiment for the specific working process of the system and the corresponding beneficial effect described above, and details are not repeated herein.
Finally, the present invention also provides a readable storage medium, which includes a computer program stored thereon, and the computer program is processed and executed to implement the method of any one of the above embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (13)
1. A method for quality assessment of a wireless signal coverage area, comprising:
acquiring measurement reports obtained by measuring each terminal in a wireless signal coverage area of a service cell of each base station, and determining sampling data of measurement sampling points of each service cell according to each measurement report, wherein the sampling data comprises signal level intensity;
judging whether the measurement sampling point is a super-penetration loss sampling point or a super-refraction sampling point according to the signal level intensity of the measurement sampling point;
and determining the quality of the wireless signal coverage area of each service cell according to the ratio of the super-penetration sampling point or the super-refraction sampling point in each service cell to the total measurement sampling point in the corresponding service cell and the number of the super-penetration sampling points or the super-refraction sampling points.
2. The method of claim 1, wherein the sampled data further comprises a base band device transmission power of a base station, a gain of a serving cell transmitting antenna, a gain of a terminal receiving antenna, a feeder loss of the base station, and a signal propagation distance;
according to the signal level intensity of the survey sampling point, whether the survey sampling point is a super-penetration loss sampling point is judged, including:
determining the propagation loss between the terminal and the corresponding service cell according to the propagation distance;
and judging whether the measurement sampling point is a super-penetration loss sampling point or not according to the base band equipment transmitting power of the base station, the gain of a transmitting antenna of a service cell, the gain of a receiving antenna of a terminal, the feeder loss, the propagation loss and the signal level strength of the base station.
3. The method of claim 2, wherein determining propagation loss between the terminal and the corresponding serving cell according to the propagation distance comprises:
calculating the propagation loss using equation (1), the equation (1) being
Wherein, L is TA Is the propagation loss between the terminal and the corresponding serving cell; TA is an index value of signal propagation distance, S TA The signal propagation distance of the signal from the serving cell to the terminal; f is the signal frequency.
4. The method of claim 2, wherein the determining whether the measurement sample is a super-penetration sample according to the base-band device transmission power of the base station, the gain of the transmitting antenna of the serving cell, the gain of the receiving antenna of the terminal, the feeder loss of the base station, the propagation loss, and the signal level strength comprises:
judging whether the measurement sampling point is a super-penetration loss sampling point or not by using a formula (2), wherein the formula (2) is
P r ＜P t +G t +G r -L t -L TA -H 1 ；
Wherein, the P r Measuring the signal level intensity of a sampling point; the P is t Transmitting power for a base band device of a base station; the G is t A gain of a transmitting antenna for a serving cell; the G is r Gain of a receiving antenna for a terminal; l is a radical of an alcohol t Is the feeder loss of the base station; said L TA Is the propagation loss between the terminal and the corresponding serving cell; said H 1 Is a first hysteresis threshold.
5. The method of claim 2, wherein the sampled data further comprises a height of a serving cell antenna and a maximum coverage distance of a serving cell;
correspondingly, according to the signal level intensity of the measurement sampling point, whether the measurement sampling point is a super-refraction sampling point is judged, including:
determining the propagation loss between the terminal and the corresponding service cell according to the propagation distance;
determining the space loss at the maximum coverage distance of the serving cell according to the height of the antenna of the serving cell and the maximum coverage distance of the serving cell;
and judging whether the measurement sampling point is a super-refraction sampling point or not according to the propagation loss and the space loss.
6. The method of claim 5, wherein the determining the spatial loss at the maximum coverage distance of the serving cell according to the height of the antenna of the serving cell and the maximum coverage distance of the serving cell comprises:
determining the space loss at the maximum coverage distance of the serving cell by using formula (3), wherein the formula (3) is
Wherein, L is MAX Determining the space loss at the maximum coverage distance of the serving cell for the maximum coverage distance of the serving cell; f is the signal frequency; s is MAX The maximum coverage distance of the serving cell; s is An Is the height of the serving cell antenna.
7. The method of claim 6, further comprising:
the maximum coverage distance of the serving cell is determined by half the distance of the farthest neighbor cell which has a handover relationship with the serving cell in the measurement report and satisfies the condition 1 or the condition 2;
the condition 1 is that within a preset first time period t1, the switching times of a serving cell and a neighboring cell are greater than a first parameter; the condition 2 is that the ratio of the number of times of switching between the serving cell and one neighboring cell to the total number of times of switching between the primary serving cell and all neighboring cells is greater than a second parameter within a preset second time period t 2.
8. The method of claim 5, wherein the determining whether the measurement sample is a hyper-refraction sample according to the propagation loss and the spatial loss comprises:
judging whether the measurement sampling point is a super-refraction sampling point or not by using a formula (4), wherein the formula (4) is L TA ＞L MAX +H 2 ；
Wherein, L is TA For propagation loss between terminal and corresponding serving cellConsumption; l is MAX Determining the space loss at the maximum coverage distance of the serving cell for the maximum coverage distance of the serving cell; said H 2 Is the second hysteresis threshold.
9. The method according to any one of claims 1 to 8, wherein said determining whether the measured sampling point is a hyper-penetration sampling point or a hyper-refraction sampling point according to the signal level strength of the measured sampling point further comprises:
and screening each measurement sampling point according to a preset signal level intensity threshold value so that the signal level intensity of the reserved measurement sampling point is smaller than the signal level intensity threshold value, and the reserved measurement sampling point is used as the measurement sampling point to judge whether the measurement sampling point is a super-penetration sampling point or a super-refraction sampling point.
10. The method of any one of claims 1-8, further comprising:
and determining the base station deployment strategy of each base station service cell according to the quality of the wireless signal coverage area of each base station service cell.
11. An apparatus for quality assessment of a wireless signal coverage area, comprising:
the system comprises a data acquisition module, a data acquisition module and a data processing module, wherein the data acquisition module is used for acquiring measurement reports obtained by measuring each terminal in a wireless signal coverage area of a service cell of each base station and determining sampling data of measurement sampling points of each service cell according to each measurement report, and the sampling data comprises signal level intensity;
the first processing module is used for judging whether the measurement sampling point is a super-penetration sampling point or a super-refraction sampling point according to the signal level intensity of the measurement sampling point;
and the second processing module is used for determining the quality of the wireless signal coverage area of each service cell according to the ratio of the super-penetration sampling points or super-refraction sampling points in each service cell to the total measurement sampling points in the corresponding service cell and the number of the super-penetration sampling points or super-refraction sampling points.
12. An apparatus for quality assessment of a wireless signal coverage area, comprising: a memory, a processor, and a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any one of claims 1-10.
13. A readable storage medium, characterized in that a computer program is stored thereon, which computer program is executed by a processor to implement the method according to any of claims 1-10.
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