KR20210143989A - Method and apparatus for determingin an optimal angle of an antenna - Google Patents

Abstract

In order to determine an optimal angle of an antenna, reference data for the angle of the antenna is provided in advance. A target grid corresponding to the reference grid of the reference data is set in a part of a service area. Signal noise information for a user terminal according to a change in the angle is calculated as wireless communication quality based on the reference grid and the target grid. A new angle with a higher degree of performance improvement compared to the existing angle is determined as the optimal angle.

Description

METHOD AND APPARATUS FOR DETERMINGIN AN OPTIMAL ANGLE OF AN ANTENNA

The following embodiments relate to a technique for determining an optimal angle of an antenna in a wireless communication network, and more particularly, to a technique for determining an optimal angle of an antenna through simulation.

Wireless communication networks (or systems) are widely deployed to provide various types of communication contents such as voice, data, and the like. A wireless communication network establishes a wireless channel with a user terminal through a base station (or cell) having respective coverage, and exchanges data through the established wireless channel. The performance of the radio channel established between the base station and the user terminal may be affected by interference signals of other nearby base stations. The less the influence of the interference signal, the better the performance of the radio channel. The coverage of neighboring base stations may be adjusted to reduce interfering signals. For example, the coverage of the neighboring base station may be adjusted by adjusting the azimuth, tilt angle, or swing angle of the antenna of the neighboring base station. Conventionally, in order to improve the quality of wireless communication, an operator adjusts the angle of the antenna empirically.

An embodiment may provide a method and a server for determining an optimal angle of an antenna.

An embodiment may provide a method and a server for determining an optimal angle of an antenna based on signal noise information for user terminals.

According to an embodiment, a method for determining an optimal angle of an antenna performed by a server includes the user terminal based on first reference signal received power (RSRP) values received from one or more user terminals using a wireless communication network. generating first signal noise information for the user terminals, determining a target antenna among antennas connected to the user terminals, determining an angle of the target antenna from a first angle to a second angle, the target antenna determining second RSRP values for the user terminals according to the second angle of , generating second signal noise information for the user terminals based on the second RSRP values, the second signal determining whether the noise information satisfies at least one preset condition, and determining the second angle as an optimal angle of the target antenna when the second signal noise information satisfies the condition. .

The generating of the first signal noise information includes receiving the first RSRP values and location information from the user terminals, based on the first RSRP values through a minimization of drive test (MDT). generating signal noise information, and representing at least one of the first RSRP values and the first signal noise information at positions on a two-dimensional plane corresponding to the positions of the user terminals based on the position information. .

The target antenna may be determined based on at least one of the first RSRP values and the first signal noise information.

The determining of the second RSRP values may include determining target reference data corresponding to the second angle among reference data of a previously generated database, and offsetting the target reference data as an offset of at least one of the first RSRP values. It may include determining the second RSRP values by applying them to some.

The step of determining the second RSRP values by applying the target reference data to at least some of the first RSRP values as an offset includes: on a two-dimensional plane in which the user terminals are located, an azimuth angle of the target antenna Setting a target grid of a preset size in which at least some of the user terminals are located based on determining the RSRP offset of the reference grid corresponding to the coordinates of the target user terminal, and determining a second target RSRP value by applying the RSRP offset to the first target RSRP value of the target user terminal. can

The size of the reference grid and the size of the target grid may be the same.

The determining whether the second signal noise information satisfies at least one preset condition may include calculating an average value of a first signal noise based on the first signal noise information; calculating a second signal noise average value based on the first signal noise average value and calculating the performance improvement for the second angle based on the second signal noise average value, and based on the The method may include determining whether the degree of performance improvement for the second angle satisfies the condition.

The determining whether the target performance improvement degree satisfies the condition may include: the performance improvement degree for the second angle among the performance improvement degree for the third angle and the performance improvement degree for the second angle of the target antenna The method may further include determining whether or not is higher, and determining that the condition is satisfied when the performance improvement for the second angle is higher than the performance improvement for the third angle.

According to another aspect, a server for performing a method for determining an optimal angle of an antenna includes a memory in which a program for determining an optimal angle of an antenna is recorded, and a processor for executing the program, the program comprising: Generating first signal noise information for the user terminals based on first reference signal received power (RSRP) values received from one or more user terminals using a communication network, among antennas connected to the user terminals Determining a target antenna, determining the angle of the target antenna from a first angle to a second angle, determining second RSRP values for the user terminals according to the second angle of the target antenna; Generating second signal noise information for the user terminals based on the second RSRP values, determining whether the second signal noise information satisfies at least one preset condition, and the second When the signal noise information satisfies the condition, determining the second angle as an optimal angle of the target antenna may be performed.

The determining of the second RSRP values may include determining target reference data corresponding to the second angle among reference data of a previously generated database, and offsetting the target reference data as an offset of at least one of the first RSRP values. It may include determining the second RSRP values by applying them to some.

The determining of the second RSRP values by applying the target reference data to at least some of the first RSRP values as an offset includes: on a two-dimensional plane in which the user terminals are located, at an azimuth of the target antenna. Setting a target grid of a preset size in which at least some of the user terminals are located based on the step, matching the reference grid of the target reference data and the coordinates of the target grid, located on the matched target grid determining the RSRP offset of the reference grid corresponding to the coordinates of the target user terminal, and determining the second target RSRP value by applying the RSRP offset to the first target RSRP value of the target user terminal. have.

The determining whether the second signal noise information satisfies at least one preset condition may include calculating an average value of a first signal noise based on the first signal noise information; calculating a second signal noise average value based on the first signal noise average value and calculating the performance improvement for the second angle based on the second signal noise average value, and based on the The method may include determining whether the degree of performance improvement for the second angle satisfies the condition.

The determining whether the target performance improvement degree satisfies the condition may include: the performance improvement degree for the second angle among the performance improvement degree for the third angle and the performance improvement degree for the second angle of the target antenna The method may further include determining whether or not is higher, and determining that the condition is satisfied when the performance improvement for the second angle is higher than the performance improvement for the third angle.

According to another aspect, a method for determining an optimal angle of an antenna performed by a server includes providing reference data indicating RSRP values for a reference grid of a preset size according to the angle of the antenna, a wireless communication network Generating first signal noise information for the user terminals based on first reference signal received power (RSRP) values received from one or more user terminals using , setting a target grid of a preset size in which at least some of the user terminals are located based on the azimuth angle of the target antenna, matching the reference grid of the target reference data and the coordinates of the target grid , generating a plurality of signal noise information by repeatedly adjusting the angle of the target antenna - the reference data is changed to correspond to the change of the angle - to the first signal noise information and the plurality of signal noise information determining target signal noise information indicating a maximum degree of performance improvement from among the plurality of signal noise information based on the plurality of signal noise information, and determining an angle corresponding to the target noise information as an optimal angle of the target antenna.

According to another aspect, the server performing the method of determining the optimal angle of the antenna, the step of providing reference data indicating RSRP values for a reference grid of a preset size according to the angle of the antenna, a wireless communication network Generating first signal noise information for the user terminals based on first reference signal received power (RSRP) values received from one or more user terminals using , setting a target grid of a preset size in which at least some of the user terminals are located based on the azimuth angle of the target antenna, matching the reference grid of the target reference data and the coordinates of the target grid , generating a plurality of signal noise information by repeatedly adjusting the angle of the target antenna - the reference data is changed to correspond to the change of the angle - to the first signal noise information and the plurality of signal noise information Determining target signal noise information indicating a maximum degree of performance improvement from among the plurality of signal noise information, and determining an angle corresponding to the target noise information as an optimal angle of the target antenna.

A method and server for determining an optimal angle of an antenna are provided.

A method and a server for determining an optimal angle of an antenna based on signal noise information for user terminals are provided.

1 illustrates a user terminal in a wireless communication network according to an example.
2 is a configuration diagram of a server according to an embodiment.
3 is a flowchart of a method of determining an optimal angle of an antenna according to an embodiment.
4 is a flowchart of a method of generating first signal noise information according to an example.
5 illustrates a two-dimensional plane in which positions of user terminals and antennas are indicated according to an example.
6 illustrates coverage according to an angle of an antenna according to an example.
7 is a flowchart of a method of determining second RSRP values according to a second angle according to an example.
8 illustrates a reference grid as reference data according to an example.
9 is a flowchart of a method of determining second RSRP values by applying reference data as an offset to at least some of the first RSRP values according to an example.
10 illustrates a target grid set on a two-dimensional plane based on an azimuth of a target antenna according to an example.
11 illustrates a target grid matched with coordinates of a reference grid according to an example.
12 shows an RSRP offset of the reference grid corresponding to the coordinates of the user terminal on the target grid in which the coordinates are matched with the reference grid according to an example.
13 is a flowchart of a method of determining whether second signal noise information satisfies a condition according to an example.
14 is a flowchart of a method of determining an optimal angle of an antenna according to another embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all modifications, equivalents and substitutes for the embodiments are included in the scope of the rights.

The terms used in the examples are used for description purposes only, and should not be construed as limiting. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In addition, in the description with reference to the accompanying drawings, the same components are given the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In the description of the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

Components included in one embodiment and components having a common function will be described using the same names in other embodiments. Unless otherwise stated, a description described in one embodiment may be applied to another embodiment, and a detailed description in the overlapping range will be omitted.

1 illustrates a user terminal in a wireless communication network according to an example.

A wireless communication network or system includes a plurality of base stations 110 and 120 that establish a channel capable of exchanging data with a user terminal 130 . The user terminal 130 establishes a connection with the base station 120 capable of providing a stronger signal among the plurality of base stations 110 and 120 , and a base station whose signal of the base station 120 connected to the user terminal 130 is different. When it is weak compared to the signal of 130 , a new connection is established with the base station 130 through handover. For example, the wireless communication network may be Long-Term Evolution networks (LTE), but is not limited to the described embodiment.

The plurality of base stations 110 and 120 provide coverages 111 and 121 that can provide a signal to the user terminal 130 , respectively. The location and area of the coverage 111 may vary according to an azimuth angle, a tilt angle, or a swing angle of the antenna of the base station 110 . For example, the smaller the tilt angle, the smaller the coverage area, but the signal provided to the user terminal 130 may be stronger. The larger the tilt angle, the larger the coverage, but the signal provided to the user terminal 130 may be weakened.

According to one aspect, when the user terminal 130 and the base station 110 are connected, the signal of the base station 120 may act as an interference signal to the user terminal 130 . In this case, if the area of the coverage 121 of the base station 120 is reduced, the interference signal acting on the user terminal 130 may also be reduced. In order to reduce the size of the coverage 121 , the tilt angle of the antenna of the base station 120 may be reduced. However, when the size of the coverage 121 is reduced, the connection quality of other user terminals connected to the base station 120 may be affected. Accordingly, the tilt angle of the antenna must be appropriately adjusted. The above description is for the 'tilt angle', but may be similarly applied to the 'swing angle'. Hereinafter, the term 'angle' means a 'tilt angle' or a 'swing angle'.

A method of determining an optimal angle of an antenna will be described in detail below with reference to FIGS. 2 to 14 .

2 is a configuration diagram of a server according to an embodiment.

The server 200 includes a communication unit 210 , a processor 220 , and a memory 230 . For example, the server 200 may be a server constituting a wireless communication network, and may be connected to the plurality of base stations 110 and 120 described above with reference to FIG. 1 .

The communication unit 210 is connected to the processor 220 and the memory 230 to transmit and receive data. The communication unit 210 may be connected to another external device to transmit/receive data. Hereinafter, the expression "transmitting and receiving "A" may indicate transmitting and receiving "information or data representing A".

The communication unit 210 may be implemented as circuitry in the server 200 . For example, the communication unit 210 may include an internal bus and an external bus. As another example, the communication unit 210 may be an element that connects the server 200 and an external device. The communication unit 210 may be an interface. The communication unit 210 may receive data from an external device and transmit the data to the processor 220 and the memory 230 .

The processor 220 processes data received by the communication unit 210 and data stored in the memory 230 . A “processor” may be a data processing device implemented in hardware having circuitry having a physical structure for performing desired operations. For example, desired operations may include code or instructions included in a program. For example, a data processing device implemented as hardware includes a microprocessor, a central processing unit, a processor core, a multi-core processor, and a multiprocessor. , an Application-Specific Integrated Circuit (ASIC), and a Field Programmable Gate Array (FPGA).

Processor 220 executes computer readable code (eg, software) stored in memory (eg, memory 230 ) and instructions issued by processor 220 .

The memory 230 stores data received by the communication unit 210 and data processed by the processor 220 . For example, the memory 230 may store a program (or an application, software). The stored program may be a set of syntaxes that are coded so as to determine the optimal angle of the antenna and are executable by the processor 220 .

According to one aspect, memory 230 may include one or more of volatile memory, non-volatile memory and random access memory (RAM), flash memory, hard disk drive, and optical disk drive.

The memory 230 stores an instruction set (eg, software) for operating the server 200 . The instruction set for operating the server 200 is executed by the processor 220 .

The communication unit 210 , the processor 220 , and the memory 230 will be described in detail below with reference to FIGS. 3 to 14 .

3 is a flowchart of a method of determining an optimal angle of an antenna according to an embodiment.

The following steps 310 to 380 are performed by the server 200 described above with reference to FIG. 2 .

In step 310 , the server 200 receives first reference signal received power (RSRP) values from one or more user terminals. For example, the server 200 receives a first RSRP value from a specific base station (ie, serving (serving) base station) connected to a specific user terminal. The first RSRP value may include not only the RSRP value for a specific base station connected to a specific user terminal, but also an RSRP value for another base station (ie, a neighbor base station) capable of providing a signal to a specific user terminal. Additionally, the server 200 may receive the location information of the user terminal together. The base station may be an eNB in LTE, and is not limited to the described embodiment.

In step 320, the server 200 generates first signal noise information for the user terminals based on the first RSRP values. For example, the first signal noise information may include a signal to interference plus noise ratio (SINR) and a signal to noise ratio (SNR), and is not limited to the described embodiment.

According to one aspect, since information not defined in 3GPP cannot be included in the information received from the user terminal, the signal noise information actually measured by the user terminal may not be obtained. The server 200 may predict or calculate the first signal noise information appearing in each user terminal based on the first RSRP values. For example, the server 200 may generate the first signal noise information through a minimization of drive test (MDT). The first RSRP value and the first signal noise information associated with the user terminal may be MDT data. A method of generating the first signal noise information will be described in detail below with reference to FIG. 4 .

In step 330 , the server 200 determines a target antenna among antennas connected to the user terminals (or antennas of the base station). The target antenna may be determined based on at least one of the first RSRP values and the first signal noise information. For example, when a signal noise value (eg, an SINR average value) among cells configured by a base station and the coverage of the base station is less than a preset value, the antenna of the corresponding cell may be determined as the target antenna. As another example, the target antenna may be selected by the user of the server 200 based on the first RSRP values and the first signal noise information.

In step 340 , the server 200 determines the angle of the target antenna from the first angle to the second angle. The currently set actual angle of the target antenna is not changed from the first angle to the second angle, but the angle of the target antenna is determined from the first angle to the second angle for simulation of the situation. For example, when the current angle of the target antenna is 0 degrees as the first angle, 3 degrees may be determined as the second angle.

In step 350, the server 200 determines the second RSRP values for the user terminals according to the second angle of the target antenna. When the angle of the target antenna among the plurality of antennas of the plurality of base stations is changed, the signal strength of the user terminals receiving the signal of the target antenna is changed. As a result of this change, second RSRP values for user terminals may be determined. The second RSRP values are RSRP values of user terminals predicted through simulation on the assumption that the angle of the target antenna is the second angle.

Compared with the first RSRP values, the RSRP values transmitted by the user terminals receiving the signal of the target antenna among the second RSRP values may be changed.

A method of determining the second RSRP values according to the second angle will be described in detail below with reference to FIGS. 7 to 12 .

In step 360, the server 200 generates second signal noise information for the user terminals based on the second RSRP values.

The description of the step 360 may be equally applied to the description of the step 320 , and thus will be omitted below for the sake of concise description.

In step 370 , the server 200 determines whether the second signal noise information satisfies a preset condition. For example, the preset condition may be whether a value (eg, an SINR average value) generated based on the second signal noise information is equal to or greater than a preset value. As another example, the preset condition is that a value generated based on the second signal noise information (eg, an SINR average value) exceeds a value generated based on the signal noise information generated according to each of the different angles of the target antenna. It may be whether or not

A method of determining whether the second signal noise information satisfies a preset condition will be described in detail below with reference to FIG. 13 .

In step 370 , the server 200 determines the second angle as the optimal angle of the target antenna when the second signal noise information satisfies the condition.

By determining the optimal angle of the target antenna through simulation, the actual angle of the target antenna can be easily adjusted. In other words, the angle of the antenna can be determined and adjusted based on the result of the simulated angle change, without relying on the operator's experience.

4 is a flowchart of a method of generating first signal noise information according to an example.

According to one aspect, the step 320 described above with reference to FIG. 3 may include the following steps 410 to 430 .

In step 410, the server 200 generates the first signal noise information based on the first RSRP values through the MDT.

In step 420 , the server 200 represents at least one of the first RSRP values and the first signal noise information on the basis of the location information of the user terminals at a location on a two-dimensional plane corresponding to the location of the user terminals. Each of the user terminals may be associated with a first RSRP value and first signal noise information. The first RSRP value and the first signal noise information associated with the user terminal may be MDT data.

For example, the two-dimensional plane may be a map indicating a service area or area in which a wireless communication service is provided. A base station (or antenna) and user terminals may be displayed on a two-dimensional plane. A two-dimensional plane is described in detail below with reference to FIG. 5 .

5 illustrates a two-dimensional plane in which positions of user terminals and antennas are indicated according to an example.

According to one aspect, the two-dimensional plane 500 may be a map indicating a service area in which a wireless communication service is provided. Antennas 511 and 512 and MDT data 501 to 504 may appear on the two-dimensional plane 500 . The location of each of the MDT data 501 to 504 is the location of the user terminals.

For example, when the MDT data 501 to 504 represent the SINR of the first signal noise information, the MDT data 501 to 504 appearing on the two-dimensional plane 500 are SINR values calculated to be visually distinguished. It can have a color corresponding to . For example, MDT data having a low SINR value may be displayed in red, and data having a high SINR value may be displayed in green.

6 illustrates coverage according to an angle of an antenna according to an example.

The coverage of the antenna 610 varies according to the angle of the antenna 610 . For example, when the first angle is smaller than the second angle, the coverage 620 by the first angle is narrower than the coverage 630 by the second angle. When the coverage 630 is changed to the coverage 620, it is not connected to the antenna 610, but it is located between the coverage 620 and the coverage 630 so that the signal of the antenna 610 acts as an interference signal. The SINR of the UE may be improved. However, since the coverage of the entire wireless communication network may be reduced when the coverage is reduced, the angle of the antenna for adjusting the size of the coverage should be appropriately determined in consideration of the SINR and the like.

7 is a flowchart of a method of determining second RSRP values according to a second angle according to an example.

According to one aspect, step 350 described above with reference to FIG. 3 may include steps 710 and 720 below.

In step 710 , the server 200 determines target reference data corresponding to the second angle from among the reference data of the pre-generated database. The reference data may be data obtained by digitizing RSRP of a user terminal located in a preset area for each type of antenna, installation height, and angle. In other words, the reference data may be beam pattern data for set values of the installed antenna.

For example, first reference data is generated in advance for a first type, a first height, a first frequency, and a first angle of the antenna, the first type of the antenna, the first height, the first frequency and the second angle Second reference data may be generated in advance for . For example, reference data can be created using the IBWAVE EM Tool.

For example, the reference data may be in the form of a reference grid (or table) of a preset size, and the value of each unit of the reference grid is a specific directional angle (eg, 45 degrees in a quadrant) at a preset antenna location. ) can be the RSRP value for the propagated signal or the strength of the electromagnetic field. Reference data will be described in detail below with reference to FIG. 8 .

In step 720, the server 200 determines the second RSRP values by applying the target reference data as an offset to at least some of the first RSRP values. For example, the RSRP values of some user terminals may be changed due to the change in the angle of the target antenna, and the changed RSRP values may be applied to the first RSRP values to determine the second RSRP values.

A method of determining the second RSRP values is described in detail below with reference to FIGS. 9 to 12 .

8 illustrates a reference grid as reference data according to an example.

According to one aspect, the reference data may be in the form of a grid. The reference grid 800 may include a plurality of units representing a two-dimensional space or region. For example, a unit may represent 5m x 5m. The illustrated reference grid 800 includes 13×13 units, but according to an embodiment, the reference grid 800 may include 60×60 units. The reference grid 800 includes 60 x 60 units, and when the size of each unit represents 5 m x 5 m, the reference grid 800 may represent an area of 300 m x 300 m.

In the case where the antenna having the target specification is located at the upper left side of the reference grid 800, and the direction angle 810 of the antenna indicates the lower right side, RSRP values for each unit in the reference grid 800 may be included. . The target specification may be a specific type of antenna, a specific installation height, a specific frequency, and a specific angle. The reference grid 800 may include a range of up to 45 degrees to the left and a range of up to 45 degrees to the right with respect to the direction angle 810 of the antenna.

For example, the unit 820 may indicate or include the RSRP value of the user terminal with respect to the target specification of the antenna when the user terminal is located in the unit 820 as a relative position with respect to the antenna. For example, each unit may have a corresponding RSRP value. The units of the illustrated reference grid 800 are marked with a color corresponding to the RSRP value of each unit.

When the target specification of the antenna changes, such as when the angle of the antenna changes, the values of units in the reference grid 800 may change. Reference data may be generated in advance for each of the various target specifications and provided as a database.

9 is a flowchart of a method of determining second RSRP values by applying reference data as an offset to at least some of the first RSRP values according to an example.

According to one aspect, step 720 described above with reference to FIG. 7 may include steps 910 - 940 .

In step 910 , the server 200 sets a target grid in which at least one user terminal among the user terminals is located on the basis of the azimuth of the target antenna on the two-dimensional plane. For example, an area having a preset size based on the azimuth angle of the target antenna may be set as the target grid. The size of the target grid may be the same as the size of the reference grid. The target grid is described in detail below with reference to FIG. 10 .

The user terminal not located on the target grid may be considered that the first RSRP value does not change even if the angle of the target antenna is changed. That is, there may be no RSRP value for the target antenna in the first RSRP value of the user terminal not located on the target grid.

In step 920, the server 200 matches the coordinates of the reference grid and the target grid of the target reference data. To match the azimuth of the target antenna to the azimuth of the antenna of the reference grid, the target grid may be rotated about the target antenna. When the target grid is rotated, the position of the user terminal (or MDT data) located on the target grid may also be changed to correspond to the rotation. A coordinate-matched target grid is described in detail below with reference to FIG. 11 .

In step 930, the server 200 determines the RSRP offset of the reference grid corresponding to the coordinates of the user terminal located on the target grid. A method of determining the RSRP offset is described in detail below with reference to FIG. 12 .

In step 940, the server 200 determines the second RSRP value by applying the RSRP offset to the first RSRP value of the user terminal.

[Table 1] below shows exemplary first RSRP values.

[Table 1]

In [Table 1], the A antenna is connected to MDT 1 and MDT 2 as a serving antenna, and to MDT 3 to 6, any one of the other antennas other than the A antenna is connected to the serving antenna. For each MDT data, the RSRP value of the serving antenna and the RSRP values of the three antennas that provide the strongest signal in addition to the serving antenna may be included in the first RSRP value. Antenna A among the antennas may be determined as a target antenna, and the angle of antenna A, which is the target antenna, may be changed. Since all of the MDT data receive the signal of the A antenna (ie, all are located on the target grid), when the angle of the A antenna changes, the first RSRP value of each MDT data is all changed.

[Table 2] shows the second RSRP value for the user terminals when the angle of the A antenna is changed in the example of [Table 1].

[Table 2]

The RSRP offset of the A antenna for each of the MDT data may be determined based on the reference grid. The value in parentheses of the antenna signal item may indicate the RSRP offset for the corresponding MDT data. For example, for MDT 1, -3 dB may be determined as the RSRP offset. A value to which the RSRP offset is applied to the first RSRP value may be determined as the second RSRP value. For example, the second RSRP value of the A antenna for MDT 1 may be determined to be -73 dB.

10 illustrates a target grid set on a two-dimensional plane based on an azimuth of a target antenna according to an example.

In the illustrated example, a target grid 1020 having a preset size based on the azimuth 1011 of the target antenna 1010 may be set. User terminals 1003 , 1004 , and 1005 located on the target grid 1020 are determined to be user terminals affected by the target antenna 1010 , and user terminals 1001 not located on the target grid 1020 . , 1002 , 1006 , and 1007 may be determined as user terminals that are not affected by the target antenna 1010 . It is assumed that even when the angle of the target antenna 1010 changes, the first RSRP values for the user terminals 1001 , 1002 , 1006 , and 1007 do not change.

11 illustrates a target grid matched with coordinates of a reference grid according to an example.

The target grid 1020 is rotated so that the coordinates of the target grid 1020 described above with reference to FIG. 10 match the coordinates of the target grid. For example, the matched target grid 1120 may be the same as a grid set based on the azimuth 1111 of the target antenna 1110 .

According to the rotation of the target grid 1020 , the user terminals 1003 , 1004 , and 1005 appear as the user terminals 1103 , 1104 , and 1105 on the target grid 1120 .

12 illustrates an RSRP offset of the reference grid corresponding to the coordinates of the user terminal on the target grid in which the coordinates are matched with the reference grid according to an example.

Since the reference grid 800 described above with reference to FIG. 8 and the target grid 1120 described above with reference to FIG. 11 are matched with each other, the location of each of the user terminals 1103 , 1104 , 1105 on the target grid 1120 and The units of the corresponding reference grid 800 may be determined. For example, a unit 1203 corresponding to the user terminal 1103 , a unit 1204 corresponding to the user terminal 1104 , and a unit 1205 corresponding to the user terminal 1105 may be determined. The RSRP offset of each of the user terminals 1103 , 1104 , 1105 may be determined based on the RSRP value of each of the units 1103 , 1104 , 1105 . For example, when the angle of the target antenna is changed to increase the strength of a signal received from the corresponding unit, the RSRP offset is positive, and when the signal strength is weakened, the RSRP offset may be negative.

13 is a flowchart of a method of determining whether second signal noise information satisfies a condition according to an example.

According to one aspect, step 370 described above with reference to FIG. 3 may include steps 1310 to 1340 below.

In operation 1310 , the server 200 may calculate an average value of the first signal noise based on the first signal noise information. For example, the value of the 'SSINR reference' item in [Table 2] may correspond to the first noise information, and based on this, the first signal noise average value may be calculated.

In operation 1320 , the server 200 may calculate an average value of the second signal noise based on the second signal noise information. For example, the value of the 'SSINR change' item in [Table 2] may correspond to the second noise information, and an average value of the second signal noise may be calculated based thereon.

In step 1330 , the server 200 calculates the performance improvement for the second angle based on the first signal noise average value and the second signal noise average value. For example, a difference between the first signal noise average and the second signal noise average value may be calculated as a performance improvement degree. As another example, a change in the number of defective SINRs and a change in the combined SINR average may be calculated as additional factors, and the performance improvement may be calculated by further considering the additional factors.

In step 1340 , the server 200 determines whether the calculated performance improvement satisfies a condition. For example, it may be determined whether the calculated performance improvement is equal to or greater than a preset value. As another example, it may be determined whether the calculated performance improvement is greater than other performance enhancements calculated for other angles.

When the performance improvement degree for the second angle satisfies the condition, the second angle may be determined as an optimal angle with respect to the target antenna.

If the performance improvement calculated for the second angle does not satisfy the condition, the following operation 1350 may be further performed.

In step 1350 , the server 200 determines the specific angle as the optimal angle when the performance improvement for the specific angle other than the second angle satisfies the condition.

14 is a flowchart of a method of determining an optimal angle of an antenna according to another embodiment.

The following steps 1410 to 1470 are performed by the server 200 described above with reference to FIG. 2 .

In step 1410, the server 200 is provided with reference data showing RSRP values for the reference grid according to the angle of the antenna. For example, before step 1420 is performed, reference data may be stored in advance in the memory 230 of the server 200 or a database or the like. As for the description of the reference data, the description of the reference data described above with reference to FIGS. 3 to 13 may be equally applied.

In step 1420, the server 200 generates first signal noise information for the user terminals based on the first RSRP values received from the user terminals. The detailed description of step 1420 may be replaced with the description of steps 310 and 320 described above with reference to FIG. 3 .

In operation 1430, the server 200 sets a target grid in which at least one user terminal is located on a two-dimensional plane based on the azimuth of the target antenna among the plurality of antennas.

In step 1440, the server 200 matches the coordinates of the reference grid and the target grid.

In step 1450, the server 200 generates a plurality of signal noise information by repeatedly adjusting the angle of the target antenna. For example, first signal noise information for a first angle of the target antenna is generated, and second signal noise information for a second angle is generated. A plurality of signal noise information may be generated as much as reference data corresponding to the angle of the antenna exists. For example, when 22 pieces of reference data exist for 0 degrees to 21 degrees (1 degree interval), 22 pieces of signal noise information may be generated.

In operation 1460 , the server 200 determines target signal noise information indicating the maximum performance improvement from among the plurality of signal noise information. The description of the method of calculating the performance improvement for each signal noise information may be replaced with the description of the step 1330 described above with reference to FIG. 13 . For example, when 22 pieces of signal noise information are generated for 0 degrees to 21 degrees, 22 degrees of performance improvement may be calculated, respectively, and target signal noise information representing the maximum degree of performance improvement may be determined from among them.

In step 1470 , the server 200 determines an angle corresponding to the target signal noise information as an optimal angle of the target antenna. For example, when the target signal noise information corresponds to the second angle, the second angle may be determined as an optimal angle of the target antenna.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and carry out program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

The software may comprise a computer program, code, instructions, or a combination of one or more thereof, which configures a processing device to operate as desired or is independently or collectively processed You can command the device. The software and/or data may be any kind of machine, component, physical device, virtual equipment, computer storage medium or device, to be interpreted by or to provide instructions or data to the processing device. , or may be permanently or temporarily embody in a transmitted signal wave. The software may be distributed over networked computer systems, and stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

As described above, although the embodiments have been described with reference to the limited drawings, those skilled in the art may apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

200: server
210: communication unit
220: processor
230: memory

Claims (17)

How to determine the optimal angle of the antenna performed by the server,
generating first signal noise information for the user terminals based on first reference signal received power (RSRP) values received from one or more user terminals using a wireless communication network;
determining a target antenna among antennas connected to the user terminals;
determining the angle of the target antenna from a first angle to a second angle;
determining second RSRP values for the user terminals according to the second angle of the target antenna;
generating second signal noise information for the user terminals based on the second RSRP values;
determining whether the second signal noise information satisfies at least one preset condition; and
determining the second angle as an optimal angle of the target antenna when the second signal noise information satisfies the condition
containing,
How to determine the optimal angle of an antenna.
According to claim 1,
The step of generating the first signal noise information includes:
receiving the first RSRP values and location information from the user terminals;
generating the first signal noise information based on the first RSRP values through a minimization of drive test (MDT); and
Representing at least one of the first RSRP values and the first signal noise information on the basis of the location information to a location on a two-dimensional plane corresponding to the location of the user terminals
containing,
How to determine the optimal angle of an antenna.
According to claim 1,
The target antenna is determined based on at least one of the first RSRP values and the first signal noise information,
How to determine the optimal angle of an antenna.
According to claim 1,
The determining of the second RSRP values comprises:
determining target reference data corresponding to the second angle from among reference data of a pre-generated database; and
determining the second RSRP values by applying the target reference data to at least some of the first RSRP values as an offset;
containing,
How to determine the optimal angle of an antenna.
5. The method of claim 4,
Determining the second RSRP values by applying the target reference data to at least some of the first RSRP values as an offset comprises:
setting a target grid of a preset size in which at least some of the user terminals are located, based on an azimuth angle of the target antenna, on a two-dimensional plane in which the user terminals are located;
matching a reference grid of the target reference data and coordinates of the target grid;
determining the RSRP offset of the reference grid corresponding to the coordinates of the target user terminal located on the matched target grid; and
Determining a second target RSRP value by applying the RSRP offset to the first target RSRP value of the target user terminal
containing,
How to determine the optimal angle of an antenna.
6. The method of claim 5,
The size of the reference grid and the size of the target grid are the same,
How to determine the optimal angle of an antenna.
According to claim 1,
The step of determining whether the second signal noise information satisfies at least one preset condition includes:
calculating a first signal noise average value based on the first signal noise information;
calculating a second signal noise average value based on the second signal noise information;
calculating a performance improvement for the second angle based on the first signal noise average value and the second signal noise average value; and
determining whether the performance improvement degree for the second angle satisfies the condition based on the
containing,
How to determine the optimal angle of an antenna.
8. The method of claim 7,
The step of determining whether the target performance improvement degree satisfies the condition comprises:
determining whether the performance improvement for the second angle is higher among the performance improvement for the third angle and the performance improvement for the second angle of the target antenna; and
determining that the condition is satisfied when the performance improvement for the second angle is higher than the performance improvement for the third angle
further comprising,
How to determine the optimal angle of an antenna.
A computer-readable recording medium containing a program for performing the method of any one of claims 1 to 8.
To perform a method of determining the optimal angle of the antenna, the server comprises:
a memory in which a program for determining the optimal angle of the antenna is recorded; and
a processor that executes the program
including,
The program is
generating first signal noise information for the user terminals based on first reference signal received power (RSRP) values received from one or more user terminals using a wireless communication network;
determining a target antenna among antennas connected to the user terminals;
determining the angle of the target antenna from a first angle to a second angle;
determining second RSRP values for the user terminals according to the second angle of the target antenna;
generating second signal noise information for the user terminals based on the second RSRP values;
determining whether the second signal noise information satisfies at least one preset condition; and
determining the second angle as an optimal angle of the target antenna when the second signal noise information satisfies the condition
to do,
server.
11. The method of claim 10,
The determining of the second RSRP values comprises:
determining target reference data corresponding to the second angle from among reference data of a pre-generated database; and
determining the second RSRP values by applying the target reference data to at least some of the first RSRP values as an offset;
containing,
server.
12. The method of claim 11,
Determining the second RSRP values by applying the target reference data to at least some of the first RSRP values as an offset comprises:
setting a target grid of a preset size in which at least some of the user terminals are located on the two-dimensional plane in which the user terminals are located, based on an azimuth of the target antenna;
matching a reference grid of the target reference data and coordinates of the target grid;
determining the RSRP offset of the reference grid corresponding to the coordinates of the target user terminal located on the matched target grid; and
Determining a second target RSRP value by applying the RSRP offset to the first target RSRP value of the target user terminal
containing,
server.
11. The method of claim 10,
The step of determining whether the second signal noise information satisfies at least one preset condition includes:
calculating a first signal noise average value based on the first signal noise information
calculating a second signal noise average value based on the second signal noise information;
calculating a performance improvement for the second angle based on the first signal noise average value and the second signal noise average value; and
determining whether the performance improvement degree for the second angle satisfies the condition based on the
containing,
server.
14. The method of claim 13,
The step of determining whether the target performance improvement degree satisfies the condition comprises:
determining whether the performance improvement for the second angle is higher among the performance improvement for the third angle and the performance improvement for the second angle of the target antenna; and
determining that the condition is satisfied when the performance improvement for the second angle is higher than the performance improvement for the third angle
further comprising,
server.
How to determine the optimal angle of the antenna performed by the server,
Providing reference data indicating RSRP values for a reference grid of a preset size according to the angle of the antenna;
generating first signal noise information for the user terminals based on first reference signal received power (RSRP) values received from one or more user terminals using a wireless communication network;
setting a target grid of a preset size in which at least some of the user terminals are located on the two-dimensional plane in which the user terminals are located, based on an azimuth angle of the target antenna;
matching a reference grid of the target reference data and coordinates of the target grid;
generating a plurality of signal noise information by repeatedly adjusting the angle of the target antenna, wherein the reference data is changed to correspond to the change of the angle;
determining target signal noise information indicating a maximum performance improvement from among the plurality of signal noise information based on the first signal noise information and the plurality of signal noise information; and
determining an angle corresponding to the target noise information as an optimal angle of the target antenna;
containing,
How to determine the optimal angle of an antenna.
A computer-readable recording medium containing a program for performing the method of claim 15 .
To perform a method of determining the optimal angle of the antenna, the server comprises:
Providing reference data indicating RSRP values for a reference grid of a preset size according to the angle of the antenna;
generating first signal noise information for the user terminals based on first reference signal received power (RSRP) values received from one or more user terminals using a wireless communication network;
setting a target grid of a preset size in which at least some of the user terminals are located on the two-dimensional plane in which the user terminals are located, based on an azimuth angle of the target antenna;
matching a reference grid of the target reference data and coordinates of the target grid;
generating a plurality of signal noise information by repeatedly adjusting the angle of the target antenna, wherein the reference data is changed to correspond to the change of the angle;
determining target signal noise information indicating a maximum performance improvement from among the plurality of signal noise information based on the first signal noise information and the plurality of signal noise information; and
determining an angle corresponding to the target noise information as an optimal angle of the target antenna;
to do,
server.

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