Site location design device and program

Abstract

The objective of the present disclosure is to carry out a suitable station placement design for a wireless communication base station.　For that purpose, a station placement design apparatus according to the present disclosure: calculates an estimated reception power at each evaluation position for each combination of a prescribed type of antennas or prescribed type of access points, by carrying out a radiowave propagation estimation for each evaluation position where it is possible to receive radiowaves from each base station associated with each combination, when installed in a prescribed installation direction at a prescribed installation position candidate; calculates a quality evaluation index indicating a ratio of the number of prescribed evaluation positions satisfying a target reception power with respect to the number of all of the evaluation positions for each combination; calculates a cost evaluation index for each combination, on the basis of cost information for each base station; calculates a comprehensive evaluation index for each combination, on the basis of the quality evaluation index and the cost evaluation index; and selects, e.g., a single combination having the maximum value for the calculated comprehensive evaluation index among the combinations.

Description

Technical Field

[0001] This disclosure relates to a technique for estimating the location where a base station for wireless communication is installed, etc.

Background Art

[0002] Generally, when installing a base station for wireless communication such as 5G (5th Generation) or Wi-Fi, it is necessary to consider the installation location and direction in consideration of radio wave shielding objects such as structures (Non-Patent Document 1).

Prior Art Documents

Non-Patent Documents

[0003]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, there are multiple types of antennas available for 5G base stations (such as expensive omnidirectional antennas, inexpensive directional antennas, etc.), and there are also multiple types of devices for Wi-Fi base stations (such as those with high power but low directivity, those with low power but high directivity, etc.). Therefore, there is a problem that an appropriate station placement design cannot be performed simply by considering the installation location and direction as in the past.

[0005] The present invention has been made in view of the above points, and an object thereof is to perform an appropriate station placement design for a base station for wireless communication.

Means for Solving the Problems

[0006] To solve the above problems, the invention according to claim 1 is a site placement design device for designing the installation of wireless communication base stations within a site placement design target area, comprising: a radio wave propagation estimation unit that calculates estimated received power at each evaluation position for each combination of a predetermined type of antenna or a predetermined type of access point device, by estimating radio wave propagation to each evaluation position where radio waves can be received from each base station relating to each combination of a predetermined type of antenna or a predetermined type of access point device when installed in a predetermined direction at a predetermined candidate installation location; a quality evaluation index calculation unit that uses the estimated received power to calculate a quality evaluation index for each combination, showing the ratio of the number of predetermined evaluation positions that have achieved the target received power to the total number of evaluation positions; a cost evaluation index calculation unit that calculates a cost evaluation index for each combination based on cost information of each base station; a comprehensive evaluation index calculation unit that calculates a comprehensive evaluation index for each combination based on the quality evaluation index and the cost evaluation index; and a selection unit that selects from each combination a single combination for which the maximum value of the comprehensive evaluation index has been calculated, or a plurality of combinations for which a predetermined number of higher-value target comprehensive evaluation indices have been calculated. [Effects of the Invention]

[0007] As described above, the present invention has the effect of enabling appropriate site placement design for wireless communication base stations. [Brief explanation of the drawing]

[0008] [Figure 1] This is an overall configuration diagram of the communication system according to this embodiment. [Figure 2] This is an electrical hardware configuration diagram of the station design device according to this embodiment. [Figure 3] This is an electrical hardware configuration diagram of the communication terminal according to this embodiment. [Figure 4] This is a functional configuration diagram of the site design device according to the first embodiment. [Figure 5] This is a conceptual diagram of the area targeted for station site design. [Figure 6]This is a flowchart showing the site design method performed by the site design device according to the first embodiment. [Figure 7] This is a flowchart illustrating the site design method performed by the site design device according to the first embodiment. [Figure 8] This figure shows the various indicators calculated for each candidate installation location, installation direction, and type of 5G antenna (or type of Wi-Fi access point device). [Figure 9] This is a functional configuration diagram of the site design device according to the second embodiment. [Figure 10] This is a flowchart showing the site design method performed by the site design device according to the second embodiment. [Figure 11] This is a flowchart showing the site design method performed by the site design device according to the second embodiment. [Figure 12] This figure shows the estimated received power and input cost calculated for each combination of candidate installation location, installation direction, and type of 5G antenna (or type of Wi-Fi access point). [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings.

[0010] [System configuration of the embodiment] First, the overall configuration of the communication system of this embodiment will be described using Figure 1. Figure 1 is an overall configuration diagram of the communication system according to this embodiment.

[0011] As shown in Figure 1, the communication system 10 of this embodiment is constructed from a site design device 30 and a communication terminal 50. The communication terminal 50 is managed and used by the user. The user is the person who refers to the output results of the site design device 30 and decides on the subsequent course of action.

[0012] In addition, the base station design device 30 and the communication terminal 50 can communicate via a communication network 100 such as the Internet. The connection form of the communication network 100 can be either wireless or wired.

[0013] The base station design device 30 is composed of one or more computers. When the base station design device 30 is composed of multiple computers, it may be referred to as the "base station design device" or the "base station design system". The base station design device 30 is a device that designs the installation of a wireless communication base station. Considering not only the installation position and direction of the wireless communication base station, but also the device cost and the type of 5G antennas (or the type of Wi-Fi AP (Access Point) devices), it performs a more appropriate base station design.

[0014] The communication terminal 50 is a computer, and in FIG. 1, a notebook computer is shown as an example. In FIG. 1, the user operates the communication terminal 50. Note that the base station design device 30 may perform processing alone without using the communication terminal 50.

[0015] 〔Hardware Configuration〕 <Hardware Configuration of the Base Station Design Device> Next, the electrical hardware configuration of the base station design device 30 will be described using FIG. 2. FIG. 2 is an electrical hardware configuration diagram of the base station design device.

[0016] As a computer, the base station design device 30 includes a CPU (Central Processing Unit) 301 as a processor, a ROM (Read Only Memory) 302, a RAM (Random Access Memory) 303, an SSD (Solid State Drive) 304, an external device connection I / F (Interface) 305, a network I / F 306, a media I / F 309, and a bus line 310 as shown in FIG. 2.

[0017] Of these, the CPU 301 controls the operation of the entire site design device 30. The ROM 302 stores programs used to drive the CPU 301, such as the IPL (Initial Program Loader). The RAM 303 is used as the work area for the CPU 301.

[0018] SSD304 reads or writes various types of data according to the control of CPU301. Note that an HDD (Hard Disk Drive) may be used instead of SSD304.

[0019] The External Device Connection I / F305 is an interface for connecting various external devices. These external devices include displays, speakers, keyboards, mice, USB (Universal Serial Bus) memory, and printers.

[0020] Network I / F306 is an interface for data communication via communication network 100.

[0021] The media interface 309 controls the reading or writing (storage) of data to or from the recording media 309m, such as flash memory. The recording media 309m includes DVDs (Digital Versatile Discs) and Blu-ray Discs (registered trademarks), among others.

[0022] Bus line 310 is an address bus, data bus, etc., for electrically connecting each component, such as the CPU 301 shown in Figure 2.

[0023] <Hardware configuration of communication terminals> Next, we will explain the electrical hardware configuration of the communication terminal 50 using Figure 3. Figure 3 is an electrical hardware configuration diagram of the communication terminal.

[0024] As a computer, the communication terminal 50 includes a CPU 501, ROM 502, RAM 503, SSD 504, external device connection I / F (Interface) 505, network I / F 506, display 507, input device 508, media I / F 509, and bus line 510, as shown in Figure 3.

[0025] Of these components, the CPU 501 controls the overall operation of the communication terminal 50. The ROM 502 stores programs used to drive the CPU 501, such as the IPL. The RAM 503 is used as the work area for the CPU 501.

[0026] SSD504 reads or writes various types of data according to the control of CPU501. Note that an HDD (Hard Disk Drive) may be used instead of SSD504.

[0027] The External Device Connection I / F 505 is an interface for connecting various external devices. These external devices include displays, speakers, keyboards, mice, USB memory sticks, and printers.

[0028] Network I / F 506 is an interface for data communication via communication network 100.

[0029] The display 507 is a type of display means, such as liquid crystal or organic EL (electroluminescence), that displays various images.

[0030] The input device 508 is a keyboard, pointing device, etc., and is a type of input means used for selecting and executing various instructions, selecting processing targets, moving the cursor, etc. Note that the pointing device function may be turned OFF when the user uses a keyboard.

[0031] The media interface 509 controls the reading or writing (storage) of data to or from the recording media 509m, such as flash memory. The recording media 509m includes DVDs and Blu-ray Discs (registered trademarks), etc.

[0032] Bus line 510 is an address bus, data bus, etc., for electrically connecting each component, such as the CPU 501 shown in Figure 3.

[0033] ●First Embodiment Next, as an example of the site location design device 30 according to this embodiment, a site location design device 30a will be described.

[0034] [Functional configuration of the first embodiment] Figure 4 is a functional configuration diagram of the site design device according to the first embodiment.

[0035] As shown in Figure 4, the station design device 30a includes an input / output unit 31, a radio wave propagation estimation unit 32, a quality evaluation index calculation unit 33, a cost evaluation index calculation unit 35, an overall evaluation index calculation unit 37, and a selection unit 39a. Each of these units is a function implemented by instructions from the CPU 301 shown in Figure 2, based on a program.

[0036] The input / output unit 31 receives design environment information, design condition information, and design target information from the communication terminal 50. The input / output unit 31 also outputs the final design result. Examples of output include display on a display connected to the site design device 30, printing using a printer connected to the site design device 30, or transmission to the communication terminal 50 via the communication network 100.

[0037] "Design environment information" includes information such as the size of the area targeted for station site design, the size and location of structures, the presence or absence of shielding, and 3D map information of the area.

[0038] The "design condition information" includes information such as the type of 5G antenna (or the type of equipment related to Wi-Fi access points), the number of base stations that can be installed (number of units in stock, etc.), possible locations for base stations within the base station design area (candidate base station locations), evaluation locations for radio wave quality within the base station design area, and the formula for calculating the overall evaluation index (coefficients, weighting, case distinctions, predetermined values, etc.).

[0039] "Design target information" includes information such as the required received power (or throughput) at evaluation locations placed within the station design target area.

[0040] Note that the information included in the design environment information, design condition information, and design objective information may differ from the examples above.

[0041] Here, we will explain the area to be designed for base station placement using Figure 5. Figure 5 is a conceptual diagram of the area to be designed for base station placement. Although Figure 5 describes an indoor area, it may also be an outdoor area. As shown in Figure 5, within the area to be designed for base station placement, there are multiple candidate installation locations c1 to c6 at various points on the ceiling, radio wave quality evaluation locations e1 at various points on the floor, and structures s1, etc.

[0042] The collective term for installation location candidates c1 to c6 is "installation location candidate c". The collective term for evaluation location e1, etc., is "evaluation location e". Also, the collective term for structure s1, etc., is "structure s". Furthermore, the numbers of installation location candidate c, evaluation location e, and structure s shown in Figure 5 are examples only and are not limited to the numbers shown in Figure 5.

[0043] The site placement design device 30a of this embodiment selects one or more optimal installation location candidates c for a 5G base station from a plurality of installation location candidates c. Alternatively, the site placement design device 30a may select one or more optimal installation location candidates c for a Wi-Fi base station from a plurality of installation location candidates c. By narrowing the site placement design target area, the site placement design device 30a can effectively select multiple optimal installation location candidates c. The same applies to the site placement design device 30b described below (selecting one optimal installation location candidate c for a 5G base station, selecting one optimal installation location candidate c for a Wi-Fi base station, and effectively selecting multiple optimal installation location candidates c).

[0044] Next, returning to Figure 4, the radio wave propagation estimation unit 32 calculates the estimated received power (or throughput) by performing radio wave propagation estimation (simulation) such as ray tracing using a 3D model. Specifically, the radio wave propagation estimation unit 32 calculates the estimated received power (or throughput) at each evaluation position for each combination by performing radio wave propagation estimation for each evaluation position where 5G radio waves can be received from each base station related to each combination of a predetermined type of 5G antenna installed in a predetermined direction at a predetermined candidate installation location, based on the design environment information and design condition information. Alternatively, the radio wave propagation estimation unit 32 calculates the estimated received power (or throughput) at each evaluation position for each combination by performing radio wave propagation estimation for each evaluation position where Wi-Fi radio waves can be received from each base station related to each combination of a predetermined type of AP device installed in a predetermined direction at a predetermined candidate installation location, based on the design environment information and design condition information. For example, if there are 6 candidate ceiling installation locations, 4 installation directions, 2 types of 5G antennas, and 10 evaluation locations on the floor, the radio wave propagation estimation unit 32 will perform calculations 480 times (= 6 × 4 × 2 × 10). Also, if there are 6 candidate ceiling installation locations, 4 installation directions, 3 types of AP devices, and 10 evaluation locations on the floor, the radio wave propagation estimation unit 32 will perform calculations 720 times (= 6 × 4 × 3 × 10).

[0045] When the radio wave propagation estimation unit 32 calculates throughput, it may, for example, predict throughput from a conversion table of received power and throughput prepared in advance by acquiring experimental data or link-level simulation.

[0046] The quality evaluation index calculation unit 33 uses the estimated received power calculated by the radio wave propagation estimation unit 32 to calculate a quality evaluation index that shows the ratio of the number of predetermined evaluation positions that achieved the target received power in the design target information to the total number of evaluation positions for each combination of predetermined types of antennas installed in a predetermined direction at a predetermined candidate installation location. For example, if there are four evaluation positions e1, e2, e3, and e4, and three evaluation positions e1, e2, and e3 have reached (cleared) the target received power when radio waves are emitted from a base station of a predetermined combination, the quality evaluation index for the base station of the predetermined combination is 75%.

[0047] Furthermore, the quality evaluation index calculation unit 33 may use the estimated received power calculated by the radio wave propagation estimation unit 32 to calculate the achievement rate with respect to the target received power at each evaluation position for each combination of a predetermined type of antenna when installed in a predetermined direction at a predetermined candidate installation position, and calculate a quality evaluation index that shows the average of the achievement rates at each evaluation position. For example, if there are three evaluation positions e1, e2, and e3, and when radio waves are output from a base station of a predetermined combination, evaluation position e1 achieves 110% of the target received power, evaluation position e2 achieves only 90% of the target received power, and evaluation position e3 achieves only 70% of the target received power, then the quality evaluation index for the base station of the predetermined combination is 90% (=(110+90+70) / 3).

[0048] The target received power (or throughput) is pre-set for each evaluation location.

[0049] The cost evaluation index calculation unit 35 calculates a cost evaluation index for each combination (a predetermined type of antenna (or predetermined type of AP device) when installed in a predetermined direction at a predetermined installation location candidate) based on the cost information of each base station in the design condition information, for example using the following (Equation 1). A and B are predetermined values ​​included in the design condition information.

[0050] Cost evaluation index = (A - equipment cost) × B ... (Equation 1) The comprehensive evaluation index calculation unit 37 calculates the comprehensive evaluation index for each combination (a predetermined type of antenna installed in a predetermined installation direction at a predetermined candidate installation location) by multiplying the quality evaluation index and the cost evaluation index by the corresponding coefficients (α, β) in the design condition information. The comprehensive evaluation index calculation unit 37 calculates the comprehensive evaluation index using, for example, the following (Equation 2).

[0051] Overall evaluation index = α × Target received power achievement rate + β × Cost evaluation index ... (Equation 2) The overall evaluation index calculation unit 37 may first narrow down the quality evaluation index to those that are equal to or greater than a predetermined value, and then calculate the overall evaluation index based on the quality leveling index and cost evaluation index corresponding to the narrowed-down quality evaluation index.

[0052] The selection unit 39a selects a combination (a combination of candidate installation location, installation direction, and type of 5G antenna (or type of Wi-Fi access point)) related to the overall evaluation index of the maximum value (or the overall evaluation index of the top N (a predetermined number) values) and outputs the selection result.

[0053] Figure 8 shows the indicators calculated for each candidate installation location, installation direction, and type of 5G antenna (or type of Wi-Fi access point device). As shown in Figure 8, when the quality evaluation indicator calculated by the quality evaluation indicator calculation unit 33, the cost evaluation indicator calculated by the cost evaluation indicator calculation unit 35, and the overall evaluation indicator calculated by the overall evaluation indicator calculation unit 37 are listed for each combination of candidate installation location, installation direction, and type of 5G antenna (or type of AP device), the selection unit 39a selects the combination related to the maximum overall evaluation indicator "9.75" (the combination of candidate installation location "c1", installation direction "d2", and type of 5G antenna "A") and outputs the selection result. The same applies when the site design device 30a deals with the type of Wi-Fi access point device instead of the type of 5G antenna.

[0054] [Processing or operation of the first embodiment] Next, the processing or operation of the site location design device 30a will be explained using Figures 6 to 8. Figures 6 and 7 are flowcharts showing the site location design method executed by the site location design device according to the first embodiment.

[0055] S11: The input / output unit 31 receives design environment information, design condition information, and design target information from the communication terminal 50 or the like.

[0056] S12: The radio wave propagation estimation unit 32 calculates the estimated received power (or throughput) at each evaluation location by estimating radio wave propagation for each evaluation location where 5G (or Wi-Fi) radio waves can be received from each base station (or each base station of an AP device of a predetermined type) equipped with a predetermined type of 5G antenna when installed in a predetermined direction at a predetermined candidate installation location, based on the design environment information and design condition information.

[0057] S13: The quality evaluation index calculation unit 33 calculates a quality evaluation index based on the estimated received power (or throughput) relative to the target received power in the design target information.

[0058] S14: The cost evaluation index calculation unit 35 calculates each cost evaluation index based on the cost information of each base station in the design condition information.

[0059] S15: The overall evaluation index calculation unit 37 calculates the overall evaluation index by multiplying the quality evaluation index and the cost evaluation index by the corresponding coefficients in the design condition information.

[0060] S16: The selection unit 39a selects a combination related to the overall evaluation index with the maximum value (or the top N overall evaluation indexes) (a combination of candidate installation location, installation direction, and type of 5G antenna (or type of Wi-Fi access point)) and outputs the selection result.

[0061] S17: The input / output unit 31 outputs the selection result from the selection unit 36 ​​as the design result.

[0062] This concludes the description of the processing or operation of the first embodiment.

[0063] [Effects of the first embodiment] As described above, this embodiment has the effect of enabling appropriate site placement design for wireless communication base stations.

[0064] ●Second Embodiment Next, as an example of the site location design device 30 according to this embodiment, a site location design device 30b will be described.

[0065] [Functional configuration of the second embodiment] Figure 9 is a functional configuration diagram of the site design device according to the second embodiment.

[0066] As shown in Figure 9, the station location design device 30b has an input / output unit 31, a radio wave propagation estimation unit 32, and a selection unit 39b. Each of these units is a function realized by instructions from the CPU 301 in Figure 2 based on a program. Components similar to those in the first embodiment are denoted by the same reference numerals and their description is omitted. In the second embodiment, the selection unit 39b differs from the selection unit 39a in the first embodiment, so the selection unit 39b will be described below.

[0067] The selection unit 36b selects the top n (a predetermined number) estimated received power (or throughput) values ​​in the design target information. The selection unit 36b then determines whether there is one minimum cost. If there is one minimum cost, the selection unit 36b selects a combination related to the minimum cost (a combination of installation location candidate, installation direction, and 5G antenna type (or AP device type)) and outputs the selection result. On the other hand, if there is more than one minimum cost (there are multiple), the selection unit 36b selects a combination related to the maximum estimated received power among the top n estimated received powers already selected (a combination of installation location candidate, installation direction, and 5G antenna type (or AP device type)) and outputs the selection result. The selection unit 36b may also select a combination related to the maximum estimated throughput among the top n estimated throughputs already selected (a combination of installation location candidate, installation direction, and 5G antenna type (or AP device type)) and output the selection result.

[0068] Figure 12 shows the estimated received power and input cost calculated for each combination of candidate installation location, installation direction, and type of 5G antenna (or type of Wi-Fi access point). For example, as shown in Figure 12, if there are estimated received power values ​​and cost values ​​output by the radio wave propagation estimation unit 32 for each combination of candidate installation location, installation direction, and type of 5G antenna (or type of AP device), the selection unit 39b selects the top n (e.g., 3) estimated received powers (or throughput). As a result, the 1st, 2nd, and 3rd from the top in Figure 12 are selected.

[0069] Next, if there is only one of the top three options with the lowest cost, that option is selected. However, in Figure 12, there are two options with the lowest cost: the first and second options from the top of Figure 12. Therefore, returning to the comparison of estimated received power, the selection unit 39b compares the first and second estimated received powers from the top of Figure 12 and ultimately selects the combination (combination of installation location candidates, installation direction, and 5G antenna type (or Wi-Fi AP type)) that corresponds to the maximum estimated received power of "-75dBm".

[0070] [Processing or operation of the second embodiment] Next, the processing or operation of the site design device 30b will be explained using Figures 10 to 12. Figures 10 and 11 are flowcharts showing the site design method executed by the site design device according to the second embodiment.

[0071] S21: The input / output unit 31 receives design environment information, design condition information, and design target information from the communication terminal 50 or the like.

[0072] S22: The radio wave propagation estimation unit 32 calculates the estimated received power (or throughput) at each evaluation location by estimating radio wave propagation for each evaluation location where 5G (or Wi-Fi) radio waves can be received from each base station (or each base station of an AP device of a predetermined type) equipped with a predetermined type of 5G antenna when installed in a predetermined direction at a predetermined candidate installation location, based on the design environment information and design condition information.

[0073] S23: The selection unit 36b selects the top n estimated received powers (or throughputs) based on the design target information.

[0074] S24: The selection unit 36b determines whether there is one lowest cost as a result of the selection process in S23.

[0075] S25: If there is only one minimum cost (S24; YES), the selection unit 36b selects a combination related to the minimum cost (a combination of candidate installation location, installation direction, and type of 5G antenna (or type of AP device)) and outputs the selection result.

[0076] S26: If there is more than one minimum cost (S24; NO), the selection unit 36b selects a combination (combination of installation location candidate, installation direction, and 5G antenna type (or AP device type)) relating to the maximum estimated received power (or throughput) from the top n estimated received power (or throughput) already selected, and outputs the selection result.

[0077] S27: The input / output unit 31 outputs the selection result from the selection unit 36 ​​as the design result.

[0078] This concludes the description of the processing or operation of the second embodiment.

[0079] [Effects of the second embodiment] As described above, this embodiment provides the same effects as the first embodiment.

[0080] Furthermore, unlike the first embodiment, the site location design device 30b of this embodiment does not require the calculation of each indicator, thus offering the advantage of being able to output design results in a relatively simple manner.

[0081] 〔supplement〕 The present invention is not limited to the embodiments described above, and may also have the following configurations or processes (operations).

[0082] (1) The site design device 30 can also be realized by a computer and a program, but this program can also be recorded on a (non-temporary) recording medium or provided via a communication network 100.

[0083] (2) In the above embodiment, a notebook computer is shown as an example of a communication terminal 50, but it is not limited to this, and may be a desktop computer, tablet computer, smartphone, smartwatch, car navigation system, refrigerator, microwave oven, etc.

[0084] (3) Each CPU 301, 501 may be a single unit or multiple units.

[0085] (4) In each of the above embodiments, the radio wave propagation estimation unit 32 estimated the received power at each evaluation position e by radio wave propagation estimation (simulation) such as ray tracing using a 3D model, but is not limited to this. The radio wave propagation estimation unit 32 may, for example, measure and predict the received power by calibrating the radio wave propagation estimation result based on actual measurement data at each evaluation position (or a part thereof).

[0086] (5) The site design equipment may also perform site design for other generations of mobile communication systems such as 4G and 6G, rather than 5G. [Explanation of Symbols]

[0087] 10 Communication Systems 30,30a,30b Station location design device 31 Input / output section 32 Radio wave propagation estimation unit 33. Quality Evaluation Index Calculation Unit 35. Cost Evaluation Index Calculation Unit 37. Comprehensive Evaluation Index Calculation Unit 39a,39b selection section

Claims

1. A site design device that performs site design for the installation of wireless communication base stations within a site design target area, A radio wave propagation estimation unit calculates the estimated received power at each evaluation position for each combination of a predetermined type of antenna or a predetermined type of access point device, by performing radio wave propagation estimation for each evaluation position where radio waves can be received from each base station related to each combination of a predetermined type of antenna or a predetermined type of access point device installed in a predetermined direction at a predetermined candidate installation location, A quality evaluation index calculation unit calculates a quality evaluation index that, using the estimated received power, calculates a quality evaluation index in each combination that shows the ratio of the number of predetermined evaluation positions that achieved the target received power to the total number of evaluation positions. Based on the cost information of each base station, a cost evaluation index calculation unit calculates a cost evaluation index for each combination, A comprehensive evaluation index calculation unit calculates a comprehensive evaluation index for each combination based on the aforementioned quality evaluation index and cost evaluation index, A selection unit that selects from among the above combinations a single combination for which the maximum value of the overall evaluation index is calculated, or a plurality of above combinations for which a predetermined number of standard overall evaluation indices with higher values ​​are calculated, A station location design device having the following features.

2. The station placement design apparatus according to claim 1, wherein the quality evaluation index calculation unit, instead of using the estimated received power to calculate a quality evaluation index that shows the ratio of the number of predetermined evaluation positions that have achieved the target received power to the total number of evaluation positions in each combination, uses the estimated received power to calculate the achievement rate with respect to the target received power at each evaluation position in each combination, and calculates a quality evaluation index that shows the average of the achievement rates of each evaluation position.

3. The radio wave propagation estimation unit calculates the throughput at each evaluation position for each combination, instead of the estimated received power at each evaluation position for each combination. The quality evaluation index calculation unit calculates the quality evaluation index using the estimated received power corresponding to the throughput. The location design device according to claim 1 or 2.

4. A site design device that performs site design for the installation of wireless communication base stations within a site design target area, A radio wave propagation estimation unit calculates the estimated received power at each evaluation position for each combination of a predetermined type of antenna or a predetermined type of access point device, by performing radio wave propagation estimation for each evaluation position where radio waves can be received from each base station related to each combination of a predetermined type of antenna or a predetermined type of access point device installed in a predetermined direction at a predetermined candidate installation location, A selection unit selects a predetermined number of estimated received powers with the highest values ​​from among the estimated received powers at each of the evaluation positions, and selects a specific combination from the selected predetermined number of estimated received powers that has the lowest cost for each combination. A station location design device having the following features.

5. If there are multiple combinations for which each combination has the lowest cost, the selection unit selects a specific combination for which the estimated received power is the maximum among the predetermined number of estimated received powers, according to claim 4.

6. The radio wave propagation estimation unit calculates the throughput at each evaluation position for each combination, instead of the estimated received power at each evaluation position for each combination. The selection unit selects a specific combination using the estimated received power corresponding to the throughput. The location design device according to claim 4 or 5.

7. A program that causes a computer to execute a site design method for designing the installation of wireless communication base stations within a site design target area, A radio wave propagation estimation process calculates the estimated received power at each evaluation position for each combination of a base station related to each combination of a predetermined type of antenna or a predetermined type of access point device installed in a predetermined direction at a predetermined candidate installation location, by performing radio wave propagation estimation to each evaluation position where radio waves can be received from the base station. A quality evaluation index calculation process that uses the estimated received power to calculate a quality evaluation index in each combination that shows the ratio of the number of predetermined evaluation positions that achieved the target received power to the total number of evaluation positions, Based on the cost information of each base station, a cost evaluation index calculation process is performed to calculate a cost evaluation index for each combination. A comprehensive evaluation index calculation process calculates a comprehensive evaluation index for each combination based on the aforementioned quality evaluation index and cost evaluation index, A selection process to select from each of the above combinations a single combination for which the maximum value of the overall evaluation index is calculated, or a plurality of above combinations for which a predetermined number of standard overall evaluation indices with higher values ​​are calculated, A program that executes the command.

8. A program that causes a computer to execute a site design method for designing the installation of wireless communication base stations within a site design target area, A radio wave propagation estimation process calculates the estimated received power at each evaluation position for each combination of a base station related to each combination of a predetermined type of antenna or a predetermined type of access point device installed in a predetermined direction at a predetermined candidate installation location, by performing radio wave propagation estimation to each evaluation position where radio waves can be received from the base station. A selection process that selects a predetermined number of estimated received powers with the highest values ​​from among the estimated received powers at each of the evaluation positions, and then selects a specific combination from among the selected predetermined number of estimated received powers that has the lowest cost for each combination. A program that executes the command.

Images