JP2009152699A - Area design device, and area design method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an area design device and an area design method, capable of performing area design after quantitatively obtaining that at which position within an area and with how much planar spread radio wave quality is improved or deteriorated by the area design. <P>SOLUTION: The area design device 1 includes: an improvement region extracting part 11 for obtaining radio wave quality distributions before and after the area design, and extracting the region where the radio wave quality is improved by the area design; a deterioration region extracting part 12 for obtaining the radio wave quality distributions before and after the area design, and extracting the region where the radio wave quality is deteriorated by the area design; and a control part 13 for controlling the improvement region extracting part 11 and the deterioration region extracting part 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an area design apparatus and an area design method in wireless communication, and more particularly to an area design apparatus and an area design method using a radio wave propagation simulator.

  In a wireless communication system, area design such as installation of a new base station and adjustment of wireless parameters (antenna direction, inclination angle, antenna power, etc.) is performed for the purpose of maintaining or improving communication quality.

  As means for supporting these area designs, the radio wave quality (Received Signal Code Power (RSCP)) in the target area, the ratio of energy per desired wave chip to the in-band received power density (Ec / N0) ) Etc.) is used.

  By using the radio wave propagation simulator, it is possible to estimate the radio quality distribution after area design without using actual measurement values, or to estimate area quality from limited measurement points. It is possible to proceed with the examination smoothly and efficiently.

  In area design using a radio wave propagation simulator, a macro evaluation index for the entire area, for example, the area coverage ratio, which is the ratio of the area of the serviceable area (cover area) to the total area of the design target area, is used. It is common to evaluate the effectiveness of area design.

  For example, Patent Document 1 as an example of related technology formulates an appropriate arrangement of base stations as a combination optimization problem, and defines an evaluation function using the number of base stations and area coverage, thereby minimizing the number of base stations. A technique for obtaining a predetermined area coverage by number is described.

  In addition, as another example of related technology, in Patent Document 2, as a method of designing an area without using a radio wave propagation simulator, both a coverage area and interference are evaluated using measured values of communication quality at a base station, A technique for optimizing the tilt angle of the antenna is described.

  Furthermore, as another example of the related art, Patent Document 3 calculates the amount of change in radio wave quality before and after area design using a radio wave propagation simulator, and adds the amount of change to the radio wave quality measurement before area design. Thus, a technique for estimating the radio wave quality after area design is described.

JP 2001-285923 A JP-T-2001-518767 JP 2005-223732 A

  However, in a related technique (see Patent Documents 1 and 2) in which area design is performed based on the above-described area coverage ratio and measurement value of communication quality at a base station (see Patent Documents 1 and 2), local specific regions (for example, specific buildings, regions, etc.) There is a problem that it is difficult to perform area design in consideration of the deterioration of radio wave quality that occurs in

  In other words, even if it is possible to evaluate the improvement and deterioration of the radio quality for the entire area or for each base station, the area design improves or deteriorates the radio quality with a certain extent at any position in the area. It is difficult to design an area after quantitatively grasping whether to do it.

  The related technique described in Patent Document 3 has the same problem as the related techniques described in Patent Documents 1 and 2. That is, the related art described in Patent Document 3 aims to improve the estimation of the radio wave quality in the entire area, and does not disclose a local quality degradation evaluation method that occurs as a result of area design.

  For this reason, in the related technology, there may be cases where areas that could be serviced before area design become unserviceable after area design. As a result of area design, it is important that people are highly public, such as stations and department stores. It can degrade the quality of radio waves in various places and cause dissatisfaction with many service users.

  Therefore, an object of the present invention is to perform area design after quantitatively grasping at what position in the area and how much spread the radio wave quality is improved or deteriorated by area design. An area design apparatus and an area design method are provided.

  In order to solve the above problems, an area design apparatus according to the present invention acquires a radio wave quality distribution before and after area design, extracts an area where radio quality is improved by area design, and area design A degradation area extraction unit that acquires radio quality distributions before and after area design, extracts a region where radio quality is degraded by area design, and a control unit that controls the improvement area extraction unit and the degradation area extraction unit It is characterized by that.

  In addition, the area design method according to the present invention includes an improved area extraction step of acquiring radio wave quality distribution before and after area design, and extracting an area where radio wave quality has been improved by area design, and before and after area design. And a deteriorated area extracting step of extracting an area where the radio wave quality has deteriorated due to area design.

  In addition, the program according to the present invention obtains the radio wave quality distribution before and after the area design in the computer and extracts an improved area extracting step for extracting an area where the radio wave quality is improved by the area design, and before and after the area design. It is a program for acquiring a later radio wave quality distribution and executing a deteriorated area extracting step for extracting an area where the radio wave quality has deteriorated due to area design.

  According to the present invention, an area in which area design can be performed after quantitatively grasping at what position in the area and how much spread the radio quality improves or deteriorates by area design. A design device and an area design method are obtained.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
(First embodiment)

  FIG. 1 is a configuration diagram of a first embodiment of the present invention.

  Referring to the figure, the area design apparatus 1 acquires radio wave quality distributions before and after area design, extracts an area where radio wave quality has been improved by area design, and before and after area design. It includes a deteriorated area extracting unit 12 that acquires a radio wave quality distribution after design and extracts an area where the radio wave quality has deteriorated due to area design, and a control unit 13 that controls the improved area extracting unit 11 and the deteriorated area extracting unit 12. Composed. A detailed description of the improved region extracting unit 11 and the deteriorated region extracting unit 12 will be described later with reference to FIG.

  Next, the operation of the first embodiment for carrying out the present invention will be described with reference to FIG. FIG. 2 is a flowchart showing an example of the operation of the first exemplary embodiment of the present invention.

  The control unit 13 controls the improved region extracting unit 11 and the deteriorated region extracting unit 12, and causes the improved region extracting unit 11 and the deteriorated region extracting unit 12 to execute the following processing.

  Referring to the figure, the improvement area extraction unit 11 acquires the radio wave quality distribution before and after the area design, and extracts the area where the radio wave quality has been improved by the area design (step S1).

  Next, the deterioration area extraction unit 12 acquires the radio wave quality distribution before and after the area design, and extracts an area where the radio wave quality has deteriorated due to the area design (step S2).

As described above, according to the first embodiment, both the area where the radio wave quality is improved by the area design and the area where the radio quality is deteriorated are extracted separately. It is possible to design the area after quantitatively grasping whether the radio wave quality is improved or deteriorated with the spread of the area.
(Second Embodiment)

  FIG. 3 is a block diagram of the second embodiment of the present invention. The second embodiment relates to another example of the configuration of the area design apparatus. In FIG. 3, the same components as those in FIG.

  Referring to FIG. 3, the area design device 1 includes an area design instruction unit 14, a radio wave propagation estimation unit 15, a geographic information storage unit 16, a radio wave quality storage unit 17, an improvement region extraction unit 11, and a degradation region extraction. The unit 12 includes an evaluation unit 18, a display unit 19, a control unit 13, and a program storage unit 20.

  The area design instructing unit 14 is an input means for setting up a new base station, adjusting radio parameters, instructing a base station to execute radio wave propagation estimation, and the like, and inputs from an input device such as a keyboard and a mouse. A file containing the information stored in a storage device such as a hard disk is received and given to the radio wave propagation estimating unit 15.

  The radio wave propagation estimator 15 is means for holding base station information such as the position of a base station and radio parameters and executing radio wave propagation estimation in a target area.

  When the radio wave propagation estimation unit 15 receives an instruction from the area design instructing unit 14 for a base station that should execute radio wave propagation estimation, the radio wave propagation estimation unit 15 acquires geographical information (terrain, building, etc.) around the base station from the geographical information storage unit 16. Then, radio wave propagation estimation is executed based on the acquired geographic information and the stored base station information.

  In addition, the radio wave propagation estimating unit 15 can also receive radio wave propagation estimation based on the information received from the area design instructing unit 14 such as correction and addition of base station information.

  As information to be estimated, radio wave quality such as desired wave received power (RSCP), energy per band of desired wave per chip, and in-band received power density ratio (Ec / N0) at any point in the area. Is included.

  The radio wave quality estimated by the radio wave propagation estimating unit 15 is stored in the radio wave quality storage unit 17 and can be output to a display unit 19 such as a display for display on a screen.

  Radio propagation estimation methods include determinism using statistical methods such as the Sakai / Okumura model, which statistically models propagation curves representing the propagation characteristics of radio waves based on actual radio wave quality measurements, and geometric optics techniques. For example, a ray tracing method for predicting propagation characteristics of radio waves can be used. Since the specific method of radio wave propagation estimation is not directly related to the present invention, detailed description thereof is omitted.

  The geographic information storage unit 16 is means for storing information such as terrain, buildings, roads, railways, rivers, population density, building density, and building type in association with position information (for example, latitude and longitude). As such geographical information, electronic maps provided by the Geospatial Information Authority of Japan and map makers, and statistical survey results (regional mesh statistics) such as the national census can be used. Since a specific data format and the like are not directly related to the present invention, detailed description thereof is omitted.

  The geographic information stored in the geographic information storage unit 16 is sent to the radio wave propagation estimation unit 15 and can be used for executing the radio wave propagation estimation and displaying the result on the display unit 19.

  The radio wave quality storage unit 17 is a means for storing the radio wave quality (radio wave quality estimation value) estimated by the radio wave propagation estimation unit 15.

  FIG. 4 shows an example of how the radio wave quality estimated value stored by the radio wave quality storage unit 17 is stored. As shown in FIG. 4, the radio wave quality storage unit 17 stores the positional information, the best server, the desired wave received power (RSCP), the energy per band of the desired wave per chip before the area design and after the area design. The power density ratio (Ec / N0) is stored.

  The position information in FIG. 4 is information for identifying a position in a target area, and XY coordinates, latitude / longitude, a serial number, and the like can be used. The best server indicates an identifier of a radio cell having the highest RSCP among radio waves received at the position.

  Returning to FIG. 3, the improvement area extraction unit 11 is a region (quality improvement area) in which the radio wave quality estimation value is improved by area design from the radio wave quality estimation value before and after area design stored in the radio wave quality storage unit 17. ).

  Whether or not the radio wave quality estimation value is improved can be determined by obtaining a difference between the radio wave quality estimation value before and after the area design in which the position information is the same.

  For example, in the case of FIG. 4, it is only necessary to extract a position where the desired wave received power or the ratio of the energy per desired wave chip to the in-band received power density becomes higher after area design than before area design.

  Note that slight changes in radio wave quality often do not make much sense when evaluating the overall area quality, so other methods can be used as a method for extracting a quality improvement region.

  As an example, a threshold for performing service availability determination may be set for the radio wave quality estimation value, and only a region that is equal to or less than the threshold before area design and equal to or greater than the threshold after area design may be extracted. At this time, by setting the threshold value of the desired wave reception power to −110 dBm, it is possible to extract only the position where service is impossible before area design and service becomes possible after area design.

  As another example, a predetermined threshold value may be set for the amount of change in the radio wave quality estimation value, and only a position where improvement over the threshold value is obtained by area design may be extracted. If the threshold for the amount of change in the desired wave received power is 10 dB, an area where the change is 10 dB or less can be ignored, and only a region where the desired wave received power has improved by 10 dB or more after area design can be extracted.

  The quality improvement region extracted by the improvement region extraction unit 11 is sent to the evaluation unit 18 in order to evaluate the effectiveness of area design. Moreover, in order to confirm the position on the map of the extracted area | region, it is also possible to output to the display part 19. FIG.

  The degradation region extraction unit 12 extracts a region (quality degradation region) where the radio wave quality estimation value has deteriorated due to area design from the radio wave quality estimation value before and after area design stored in the radio wave quality storage unit 17. It is.

  Whether or not the radio wave quality estimation value has deteriorated can be determined by obtaining a difference between the radio wave quality estimation value before and after the area design where the position information is the same. For example, in the case of FIG. 4, it is only necessary to extract a position where the desired wave received power or the ratio of the energy per desired wave chip to the in-band received power density is lower than that before area design after area design.

  As with the quality improvement area extraction, slight changes in radio wave quality often do not make much sense when evaluating the overall area quality, so other methods can be used to extract the quality deterioration area. It can also be taken.

  The quality degradation region extracted by the degradation region extraction unit 12 is sent to the evaluation unit 18 in order to evaluate the effectiveness of area design. Moreover, in order to confirm the position on the map of the extracted area | region, it is also possible to output to the display part 19. FIG.

  The evaluation unit 18 is a means for evaluating the effectiveness of the area design based on the quality improvement region extracted by the improvement region extraction unit 11 and the quality deterioration region extracted by the deterioration region extraction unit 12.

  The evaluation result of the area design by the evaluation unit 18 is output to the display unit 19 and can be confirmed by a display or the like. A specific evaluation method in the evaluation unit 18 will be described later.

  The display unit 19 displays the estimation result of the radio wave quality by the radio wave propagation estimation unit 15, the quality improvement region extracted by the improvement region extraction unit 11, the quality degradation region extracted by the degradation region extraction unit 12, and the area design by the evaluation unit 18. It is a means for receiving an evaluation result, etc., and displaying it using a display means such as a display.

  FIG. 5 is an example of an area design evaluation result screen displayed by the display unit 19.

  Referring to FIG. 5, radio wave quality distribution 101 before area design is displayed on the upper left side of screen 2, radio wave quality distribution 102 after area design is displayed on the upper right side of screen 2, and radio waves before and after the area design are displayed on the lower left side of screen 2. A quality improvement region and a quality deterioration region 103 obtained based on the quality distribution are shown, and an area design evaluation result 104 is shown on the lower right side of the screen 2.

  In addition, a description 105 of the description of the areas 101 to 103 is made under the evaluation result 104 on the screen 2.

  That is, referring to the area 103, the serviceable area, the quality improvement area, and the quality deterioration area are displayed separately and on the same screen.

  The program storage unit 20 stores a program to be described later.

  The control unit 13 controls the above-described parts 11, 12, 14-20.

  FIG. 6 is a flowchart showing an example of the operation of the second exemplary embodiment of the present invention. Next, the operation of the second embodiment will be described. In addition, the following processes are performed when the control part 13 controls the above-mentioned site | parts 11, 12, 14-20.

  First, when an area (base station) for area design is designated by the area design instructing unit 14 (step S11), the radio wave propagation estimating unit 15 executes radio wave propagation estimation for the designated area (step S12).

  Next, based on the result of the radio wave propagation estimation in step S12, area design such as installation of a new base station and adjustment of radio parameters is performed by the area design instructing unit 14, and the base station information after the area design is obtained as the radio wave propagation estimating unit 15. (Step S13).

  The radio wave propagation estimation unit 15 performs radio wave propagation estimation again based on the given base station information (step S14), and determines whether or not a predetermined area coverage is satisfied (step S15).

  For example, whether or not the area coverage is 95% or more can be set as the determination condition. If this determination condition is not satisfied (in the case of “no” in step S15), the area design in step S13 is performed again.

  On the other hand, when the determination condition of step S15 is satisfied (in the case of “yes” in step S15), the improved region extraction unit 11 acquires the radio wave quality estimation values before and after the area design from the radio wave quality storage unit 17. Then, an area where the estimated radio wave quality is improved after the area design is extracted (step S16).

  Similarly, the degradation area extraction unit 12 acquires the radio wave quality estimation values before and after area design from the radio wave quality storage unit 17, and extracts areas where the radio wave quality estimation values have deteriorated after area design (step S17). .

  It should be noted that the quality improvement area extraction process (step S16) and the quality deterioration area extraction process (step S17) may of course be executed in the reverse order.

  Next, the evaluation unit 18 evaluates the effectiveness of the area design based on the quality improvement region extracted by the improvement region extraction unit 11 and the quality deterioration region extracted by the deterioration region extraction unit 12 (step S18).

  The evaluation result here is displayed on the screen by the display unit 19, and if the predetermined condition is satisfied (in the case of “yes” in step S19), the area design is finished, and if not satisfied (in step S19) In the case of “no”), the area design in step S13 is performed again.

  For example, an evaluation function having a positive correlation with the area of the quality improvement region and a negative correlation with the area of the quality degradation region is defined, and the determination condition in step S19 is that the evaluation value is equal to or greater than a predetermined value. Can do.

  Further, a cost function having a negative correlation with the area of the quality improvement region and having a positive correlation with the area of the quality deterioration region may be defined, and the evaluation condition may be determined to be equal to or less than a predetermined value as the determination condition in step S19. .

  Next, a specific example of the area design evaluation method will be described.

  First, the improvement area extraction unit 11 extracts, as a quality improvement area, an area in which the desired wave reception power is improved by area design and is unserviceable before area design and becomes serviceable after area design (step S16).

  Next, the degradation area extraction unit 12 extracts, as a quality degradation area, an area where the desired wave reception power is degraded due to the area design and can be serviced before the area design and becomes unserviceable after the area design (step S17).

For example, it is determined that service is possible when the desired wave reception power is −110 dBm or more, and service is impossible when it is less than −110 dBm. In the evaluation function f, the area of the extracted quality improvement region is s1, the area of the quality deterioration region is s2, and the evaluation value is z. Z = f (s1, s2) = s1−k * s2 (1)
And so on.

  Here, k is a constant that defines how much penalty is imposed on the area of the quality degradation region.

  When k = 0, the quality degradation region is ignored, and the area design is evaluated only from the area of the quality improvement region.

  When k = 1, the area design is evaluated as a substantial enlarged area of the service area obtained by subtracting the area of the quality degradation area from the area of the quality improvement area.

  For example, when it is desired to keep the area of the quality improvement region at 5 times or more the area of the quality deterioration region, k = 5 and the evaluation value z may be 0 or more as a determination condition in step S19.

  Further, when the quality improvement area and the quality degradation area are extracted by the improvement area extraction unit 11 and the degradation area extraction unit 12, a plurality of radio wave quality indicators (for example, desired wave received power and energy vs. band per desired wave chip) (Inner received power density ratio) may be considered simultaneously.

  Specifically, the quality improvement region extraction process (step S16) and the quality deterioration region extraction process (step S17) may be operated as follows.

  First, at least one of the desired wave received power or the ratio of energy per desired wave chip to the in-band received power density before the area design is equal to or less than a predetermined threshold, and the desired wave received power and the desired wave 1 after the area design. A region where the ratio of energy per chip to the in-band received power density ratio is equal to or greater than a predetermined threshold is extracted as a quality improvement region (step S16).

  Next, the desired wave received power and the ratio of energy per in-band received power density to the in-band received power density ratio are both greater than or equal to a predetermined threshold before area design, and the desired wave received power or desired wave per chip after area design. A region where at least one of the energy-to-band received power density ratio is equal to or less than a predetermined threshold is extracted as a quality degradation region (step S17).

  For example, −110 dBm can be used as the predetermined threshold in the case of the desired wave reception power, and −20 dB can be used in the case of the ratio of energy per desired wave chip to the reception power density in the band.

As described above, according to the second embodiment, the improved region extracting unit 11 and the deteriorated region extracting unit are a region in which the radio wave quality estimated by the radio wave propagation estimating unit 15 is improved or deteriorated by area design. 12, and the area design is evaluated by the evaluation unit 18 in consideration of the position and area of the region. For this reason, it is possible to quantitatively grasp where the radio wave quality estimate has improved or deteriorated at what position by the area design, and the area that was previously serviceable can no longer be serviced by the area design. It is possible to realize an area design that minimizes negative effects such as becoming.
(Third embodiment)

  Next, a third embodiment for carrying out the present invention will be described. The third embodiment is a modification of the operation of the second embodiment. FIG. 7 is a flowchart showing an example of the operation of the third exemplary embodiment of the present invention.

  The basic configuration of the third embodiment of the present invention is the same as that of the second embodiment. However, when the evaluation unit 18 evaluates the area design, the quality improvement region and the quality degradation region are used. The geographical information included, for example, the number of service subscribers, population density, building density, number of public facilities (department stores, stations, parks, etc.), pre-designated important points, etc. can be considered.

  An example of the operation of the area design apparatus 1 according to the third embodiment will be described with reference to FIG. In FIG. 7, the same operations (see FIG. 6) as those in the second embodiment are denoted by the same symbols, and detailed description thereof is omitted. The following processing is executed by the control unit 13 controlling the above-described parts 11, 12, 14 to 20.

  In the third embodiment, the evaluation unit 18 obtains the geographic information of the quality improvement region from the geographic information storage unit 16 (step S21), and the geographic information of the quality degradation region from the geographic information storage unit 16. Points to be acquired (step S22), the area design and quality information of the quality improvement region and the area and geographic information of the quality degradation region to be evaluated (step S23) The second embodiment is different from the second embodiment in that the geographic information is used for evaluation determination (step S24).

  Next, a specific example of the operation of the evaluation unit 18 in the third embodiment will be described.

  First, the population density and the number of public facilities in the quality improvement area are acquired from the geographic information storage unit 16.

  Next, the population density and the number of public facilities in the quality degradation area are acquired from the geographic information storage unit 16.

The evaluation function f uses the area (s1) and the population density (p1) of the quality improvement region and the area (s2) and the population density (p2) of the quality degradation region,
z = f (s1, p1, s2, p2) = s1 * p1-k * s2 * p2 (2)
And so on.

  The meaning of the constant k here is the same as that in the fourth embodiment, but in the formula (2), instead of the area, the area design is evaluated by the estimated population in the area calculated by multiplying the area by the population density. Will do.

  Furthermore, in addition to the restriction on the evaluation value z, it can be added that the number of public facilities included in the quality degradation region is 0, for example, in the area design evaluation criteria.

  Also, important points in the area (for example, specific buildings, regions, etc.) are designated in advance by the area design instruction unit 14, and it is determined whether or not the important points are included in the quality improvement region or the quality degradation region. The determination result can be used as an evaluation function or displayed on the display unit 19.

  FIG. 8 shows an example of an area design evaluation result screen displayed by the display unit 19.

  Referring to FIG. 8, information 201 in which a base station, an important point, a quality improvement area, and a quality deterioration area are superimposed on the map of the area is displayed on the upper left side of the screen 3, and the quality improvement area and For each quality degradation area, an area design evaluation result 202 such as an area, population density, estimated population, number of public facilities, whether or not important points are included is displayed.

  A description 203 of the description of the information 201 is provided on the lower left side of the screen 3.

  As described above, according to the third embodiment, since area design is performed in consideration of geographical information included in the quality improvement area and the quality deterioration area and important points designated in advance, a station, a department store, etc. Area design that prevents deterioration of radio wave quality in important areas that are public and that are likely to attract people is possible.

Note that the area design apparatus 1 shown in FIG. 3 can be configured by hardware, software, or a combination thereof.
(Fourth embodiment)

  The fourth embodiment relates to an example of an area design method program in the area design apparatus 1.

  Referring to FIG. 3, the area design apparatus 1 includes a program storage unit 20. The program storage unit 20 stores an area design method program shown in the flowcharts of FIGS.

  The control unit 13 of the area designing apparatus 1 reads the program from the program storage unit 20 and controls each of the parts 11, 12, 14 to 20 according to the program. Since the contents of the control have already been described, description thereof is omitted here.

  As described above, according to the fourth embodiment, both the area where the radio wave quality is improved by the area design and the area where the radio quality is deteriorated are extracted separately. A program of an area design method capable of performing area design after quantitatively grasping whether or not the radio wave quality is improved or deteriorated with the spread of the area is obtained.

  It is apparent from the above description that the present invention can be used not only for mobile communication but also as an area design apparatus and area design method for fixed wireless communication such as wireless LAN and WiMax.

It is a block diagram of the 1st Embodiment of this invention. It is a flowchart which shows an example of operation | movement of the 1st Embodiment of this invention. It is a block diagram of the 2nd Embodiment of this invention. It is a figure which shows an example of the holding | maintenance form of the radio wave quality estimated value memorize | stored by the radio wave quality memory | storage part. It is a figure which shows an example of the evaluation result of the area design displayed by the display part. It is a flowchart which shows an example of the operation | movement of the 2nd Embodiment of this invention. It is a flowchart which shows an example of the operation | movement of the 3rd Embodiment of this invention. It is a figure which shows an example of the evaluation result of the area design displayed by the display part.

Explanation of symbols

1 Area design equipment
A few screens
11 Improvement area extraction unit
12 Degraded area extraction unit
13 Control unit
14 Area design instruction section
15 Radio wave propagation estimation unit
16 Geographic information storage
17 Radio quality memory
18 Evaluation Department
19 Display
20 Program storage unit 103, 201 Quality improvement area and quality degradation area 104, 202 Area design evaluation result 105, 203 Description of display description

Claims (24)

An improved area extraction unit that acquires radio wave quality distribution before and after area design and extracts areas where radio quality has been improved by area design;
A degradation area extraction unit that acquires radio wave quality distribution before and after area design and extracts areas where radio wave quality has deteriorated due to area design;
An area design apparatus comprising: a control unit that controls the improvement region extraction unit and the deteriorated region extraction unit.   The improved area extracting unit and the deteriorated area extracting unit have a radio wave quality based on a threshold value set to at least one of an absolute value of the radio wave quality after area design or a change amount of the radio wave quality accompanying area design. 2. The area design apparatus according to claim 1, wherein an improved area and an area where radio wave quality is deteriorated are extracted.   The evaluation unit for evaluating the effectiveness of area design based on the region extracted by the improvement region extraction unit and the region extracted by the deteriorated region extraction unit. Area design equipment.   4. The area according to claim 3, wherein the evaluation unit evaluates the effectiveness of the area design using an area extracted by the improved region extraction unit and an area extracted by the deteriorated region extraction unit. 5. Design equipment.   The said evaluation part evaluates the effectiveness of area design using the geographical information of the area | region extracted by the said improvement area | region extraction part, and the area | region extracted by the said deterioration area | region extraction part. Area design equipment.   The area design apparatus according to claim 5, wherein the geographic information includes at least one of position, population density, building density, and the number of public facilities.   The evaluation unit evaluates the effectiveness of the area design using whether or not the designated important point is included in the region extracted by the improved region extraction unit and the region extracted by the deteriorated region extraction unit. The area design apparatus according to claim 3.   8. The radio wave quality is any one or both of a desired wave received power estimated by a radio wave propagation simulator and an energy-to-band received power density ratio per desired wave chip, or both. The area design device described in Crab. An improved area extraction step for acquiring radio wave quality distribution before and after area design, and extracting areas where the radio wave quality has been improved by area design,
An area design method comprising: a degradation area extraction step of acquiring a radio quality distribution before and after area design and extracting an area where radio quality is degraded by area design.   The improvement area extraction step and the deteriorated area extraction step are based on a threshold value set to at least one of an absolute value of radio quality after area design or a change amount of radio quality associated with area design. The area design method according to claim 9, wherein an improved area and an area where radio wave quality is deteriorated are extracted.   11. The evaluation step of evaluating the effectiveness of area design based on the region extracted by the improvement region extraction step and the region extracted by the deteriorated region extraction step. Area design method.   12. The area according to claim 11, wherein the evaluation step evaluates the effectiveness of area design using the area extracted by the improvement region extraction step and the area of the region extracted by the deterioration region extraction step. Design method.   12. The evaluation according to claim 11, wherein the evaluation step evaluates the effectiveness of the area design using geographic information of the region extracted by the improved region extraction step and the region extracted by the deteriorated region extraction step. Area design method.   The area design method according to claim 13, wherein the geographic information includes at least one of position, population density, building density, and the number of public facilities.   The evaluation step evaluates the effectiveness of the area design using whether or not the designated important point is included in the region extracted by the improvement region extraction step and the region extracted by the deterioration region extraction step. The area design method according to claim 11.   16. The radio wave quality is any one or both of a desired wave received power estimated by a radio wave propagation simulator and an energy-to-band received power density ratio per desired wave chip, or both. The area design method described in Crab. An improved area extraction step for acquiring radio wave quality distribution before and after area design in a computer and extracting areas where the radio wave quality has been improved by area design;
A program for acquiring radio wave quality distribution before and after area design, and executing a deteriorated area extraction step for extracting areas where the radio wave quality has deteriorated due to area design.   The improvement area extraction step and the deteriorated area extraction step are based on a threshold value set to at least one of an absolute value of radio quality after area design or a change amount of radio quality associated with area design. 18. The program according to claim 17, wherein an improved area and an area where radio wave quality is deteriorated are extracted.   19. The evaluation step of evaluating the effectiveness of area design based on the region extracted by the improvement region extraction step and the region extracted by the deteriorated region extraction step. Program.   20. The program according to claim 19, wherein the evaluation step evaluates the effectiveness of area design using the area extracted by the improved region extraction step and the area of the region extracted by the deteriorated region extraction step. .   20. The evaluation of the area according to claim 19, wherein the evaluation step evaluates the effectiveness of the area design using geographic information of the area extracted by the improvement area extraction step and the area extracted by the deterioration area extraction step. program.   The program according to claim 21, wherein the geographic information includes at least one of a position, population density, building density, and number of public facilities.   The evaluation step evaluates the effectiveness of the area design using whether or not the designated important point is included in the region extracted by the improvement region extraction step and the region extracted by the deterioration region extraction step. The program according to claim 19.   The radio wave quality is either or both of a desired wave received power estimated by a radio wave propagation simulator and an energy-to-band received power density ratio per desired wave chip, or both. The program described in

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