Installation location determination device and method for installation location determination of radio device

1. An installation location determination device for a radio device comprising:

a memory configured to store device information on a transmitter and a receiver that receives a radio wave transmitted by the transmitter and environment information on an environment in which communication by the transmitter and the receiver is to be performed; and

a processor coupled to the memory, configured to:

obtain the device information and the environment information from the memory,

perform first simulation using a ray tracing method based on the device information and the environment information to calculate first received signal strengths at a plurality of installation candidate points and second received signal strengths at a plurality of neighboring points, the plurality of installation candidate points being located respectively at centers of a plurality of installation candidate locations where the receiver is to be installed, the plurality of neighboring points setting for, based on a ratio between a setting range of the neighboring points and a wavelength and a ratio between a setting interval of the neighboring points and the wavelength, each of the installation candidate points within a first distance from the installation candidate point, the second received signal strengths being strengths when the receiver is installed at each of the plurality of neighboring points,

calculate third received signal strengths in the respective installation candidate locations based on a calculation result of the first received signal strengths and the second received signal strengths,

determine an installation location of the receiver based on the third received signal strengths, and

output the installation location.

2. The installation location determination device for a radio device according to claim 1 , wherein the processor

extracts, from a group including a first installation candidate point among the plurality of installation candidate points and the plurality of neighboring points set within the first distance from the first installation candidate point, a first point at which the first received signal strength is greatest and a second point at which the first received signal strength is smallest, the first received signal strengths calculated in the first simulation performed in a condition where a mobile object is not included in the environment,

performs second simulation using the ray tracing method in a condition where the mobile object is included in the environment to calculate fourth received signal strengths at the first point and the second point, and

calculates the third received signal strength based on the fourth received signal strengths.

3. The installation location determination device for a radio device according to claim 2 , wherein an interval between each of the installation candidate points and each of the neighboring points corresponding to the installation candidate point is set based on a spatial correlation of spatial fading relative to the installation candidate point.

4. The installation location determination device for a radio device according to claim 2 , wherein the processor

estimates fifth received signal strengths at points other than the first point and the second point among the first installation candidate point and the plurality of neighboring points set within the first distance from the first installation candidate point, based on the fourth received signal strengths at the first point and the second point, and

calculates the third received signal strength by obtaining an average of the fourth received signal strengths and the fifth received signal strengths.

5. The installation location determination device for a radio device according to claim 2 , wherein the processor

estimates a fifth received signal strength at the first installation candidate point based on the fourth received signal strengths at the first point and the second point, and

calculates the third received signal strength by obtaining an average of the fourth received signal strengths and the fifth received signal strength.

6. The installation location determination device for a radio device according to claim 2 , wherein the processor calculates the third received signal strength by obtaining an average of the third fourth received signal strengths at the first point and the second point.

7. The installation location determination device fora radio device according to claim 1 , wherein the processor

extracts, from a group including a first installation candidate point among the plurality of installation candidate points and the plurality of neighboring points set within the first distance from the first installation candidate point, a first point at which the first received signal strength is smallest, the first received signal strength calculated in the first simulation performed in a condition where a mobile object is not included in the environment,

performs second simulation using the ray tracing method in a condition where the mobile object is included in the environment to calculate a fourth received signal strength at the first point, and

determines the third received signal strength based on the fourth received signal strength.

8. A method for installation location determination of a radio device performed by a computer coupled to a memory that stores device information on a transmitter and a receiver that receives a radio wave transmitted by the transmitter and environment information on an environment in which communication by the transmitter and the receiver is to be performed, the method comprising:

obtaining the device information and the environment information from the memory;

performing first simulation using a ray tracing method based on the device information and the environment information to calculate first received signal strengths at a plurality of installation candidate points and second received signal strengths at a plurality of neighboring points, the plurality of installation candidate points being located respectively at centers of a plurality of installation candidate locations where the receiver is to be installed, the plurality of neighboring points setting for, based on a ratio between a setting range of the neighboring points and a wavelength and a ratio between a setting interval of the neighboring points and the wavelength, each of the installation candidate points within a first distance from the installation candidate point, the second received signal strengths being strengths when the receiver is installed at each of the plurality of neighboring points;

calculating third received signal strengths in the respective installation candidate locations based on a calculation result of the first received signal strengths and the second received signal strengths;

determining an installation location of the receiver based on the third received signal strengths; and

outputting the installation location.

9. A non-transitory computer-readable recording medium having stored therein a program for causing a computer to execute a process for installation location determination of a radio device, the computer coupled to a memory that stores device information on a transmitter and a receiver that receives a radio wave transmitted by the transmitter and environment information on an environment in which communication by the transmitter and the receiver is to be performed, the process comprising:

obtaining the device information and the environment information from the memory;

performing first simulation using a ray tracing method based on the device information and the environment information to calculate first received signal strengths at a plurality of installation candidate points and second received signal strengths at a plurality of neighboring points, the plurality of installation candidate points being located respectively at centers of a plurality of installation candidate locations where the receiver is to be installed, the plurality of neighboring points setting for, based on a ratio between a setting range of the neighboring points and a wavelength and a ratio between a setting interval of the neighboring points and the wavelength, each of the installation candidate points within a first distance from the installation candidate point, the second received signal strengths being strengths when the receiver is installed at each of the plurality of neighboring points;

calculating third received signal strengths in the respective installation candidate locations based on a calculation result of the first received signal strengths;

determining an installation location of the receiver based on the third received signal strengths; and

outputting the installation location.