Information processing device, information processing method, and program

Abstract

The purpose of this disclosure is to provide an information processing device that addresses the problem of properly correcting the radio wave intensity on the basis of the influence of external factors.　An information processing device (1) of this disclosure acquires a radio wave intensity of a terminal (31) at a first antenna (21) and a second antenna (22) that transmit and receive a radio wave from the terminal (31) and a radio wave intensity between the first and second antennae (21) and (22), and when a predetermined condition is satisfied, calculates a coefficient representing a radio wave condition around the antennae on the basis of the radio wave intensity between the first and second antennae (21) and (22), and corrects the radio wave intensity of the terminal (31) on the basis of the coefficient.

Description

[Technical Field]

[0001] The present disclosure relates to an information processing device, an information processing method, and a recording medium. [Background technology]

[0002] Indoors, such as in a shopping mall, it is difficult to determine the user's current location because the GPS (Global Positioning System) satellite signal cannot be received. In recent years, a related technology has been proposed that estimates the current location of a user's information processing device by triangulation based on the difference in radio wave strength received from multiple access points. This method can determine the user's current location even indoors, so it is considered to be an alternative to GPS. It is attracting a lot of attention.

[0003] An example of a position estimation technique related to the present disclosure is described in Patent Document 1. The information processing device described in Patent Document 1 mitigates the influence of antenna gain and identifies the user's current location. The information processing device is equipped with a wireless communication antenna and acquires tentative current location information indicating the current location of the information processing device by triangulation based on the radio wave strength of wireless signals from each transmitter and the location information of each transmitter. The information processing device then identifies the direction of the transmitter relative to the tentative current location and corrects the radio wave strength according to the relationship between the direction and the antenna gain of the wireless communication antenna to acquire true current location information. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-195334 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-described location estimation method, in which radio wave intensity is corrected according to the relationship between the direction of the transmitter relative to the tentative current location and the antenna gain of the wireless communication antenna, and current location information of the information processing device owned by the user is acquired, the influence of external factors is not taken into consideration when correcting the radio wave intensity. For example, if there is an obstacle between the information processing device and each transmitter, radio waves are blocked or interfered with, resulting in a problem of location estimation being performed based on incorrect radio wave intensity, resulting in a deterioration in the accuracy of the location estimation.

[0006] In view of the above-mentioned problems, an object of the present disclosure is to provide an information processing device, an information processing method, and a recording medium that solve the problem of appropriately correcting radio wave intensity based on the influence of external factors. [Means for solving the problem]

[0007] An information processing device in one embodiment of the present disclosure includes a communication unit that acquires the radio wave strength of a terminal at a first antenna and a second antenna that transmit and receive radio waves to the terminal, and the radio wave strength between the first antenna and the second antenna, a coefficient calculation unit that calculates a coefficient representing the radio wave conditions around the antennas based on the radio wave strength between the first antenna and the second antenna when a predetermined condition is met, and a calculation unit that corrects the radio wave strength of the terminal using the coefficient representing the radio wave conditions around the antennas.

[0008] A method of an information processing device in one aspect of the present disclosure acquires the radio wave strength of a terminal at a first antenna and a second antenna that transmit and receive radio waves to the terminal, and the radio wave strength between the first antenna and the second antenna, and if a predetermined condition is met, calculates a coefficient representing the radio wave conditions around the antenna based on the radio wave strength between the first antenna and the second antenna, and corrects the radio wave strength of the terminal using the coefficient representing the radio wave conditions around the antenna.

[0009] A computer-readable recording medium storing a program according to one embodiment of the present disclosure causes a computer to perform the following processes: acquiring the radio wave strength of a terminal at a first antenna and a second antenna that transmit and receive radio waves to the terminal, and the radio wave strength between the first antenna and the second antenna; calculating, if a predetermined condition is met, a coefficient representing the radio wave conditions around the antenna based on the radio wave strength between the first antenna and the second antenna; and correcting the radio wave strength of the terminal using the coefficient representing the radio wave conditions around the antenna. [Effects of the Invention]

[0010] According to the present disclosure, an information processing device, a radio wave intensity correction method, and a recording medium are provided that are capable of appropriately correcting radio wave intensity based on the influence of external factors. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating an example of the configuration of a system according to a first embodiment. [Figure 2] 1 is a diagram illustrating an example of the configuration of an information processing device according to a first embodiment. [Figure 3] FIG. 4 is a diagram showing an example of measurement of reference radio wave intensity between antennas in a first state according to the first embodiment. [Figure 4] FIG. 10 is a diagram showing an example of measuring the radio wave intensity between antennas in a second state according to the first embodiment. [Figure 5] 4 is a flowchart illustrating an example of processing executed by the information processing device according to the first embodiment. [Figure 6] 10 is a flowchart showing an example of a coefficient calculation process executed by the information processing device according to the first embodiment. [Figure 7] 10 is a flowchart illustrating an example of a radio wave intensity correction process executed by the information processing device according to the first embodiment. [Figure 8] FIG. 10 is a diagram illustrating an example of the configuration of a system according to a second embodiment. [Figure 9] FIG. 10 is a diagram illustrating an example of the configuration of an information processing device according to a second embodiment. [Figure 10] FIG. 11 is a diagram showing an example of a reference radio wave intensity measurement result between antennas in a first state according to the second embodiment. [Figure 11] FIG. 10 is a diagram showing an example of a result of measuring radio wave intensity between antennas in a second state according to the second embodiment. [Figure 12] 10 is a flowchart illustrating an example of processing executed by an information processing device according to the second embodiment. [Figure 13] 10 is a flowchart showing an example of a coefficient calculation process executed by the information processing device according to the second embodiment. [Figure 14] 10 is a flowchart illustrating an example of a radio wave intensity correction process executed by the information processing device according to the second embodiment. [Figure 15] FIG. 10 is a diagram illustrating an example of the configuration of an information processing device according to a third embodiment. [Figure 16] FIG. 11 is a diagram showing an example of actual position information of each antenna according to the third embodiment. [Figure 17] FIG. 11 is a diagram showing an example of estimated position information of each antenna according to the third embodiment. [Figure 18] FIG. 11 is a diagram showing an example of the positional relationship between the actual position of each antenna and the estimated position of each antenna according to the third embodiment. [Figure 19] 11 is a flowchart illustrating an example of processing executed by an information processing device according to the third embodiment. [Figure 20] FIG. 10 is a diagram illustrating an example of the configuration of a system according to a fourth embodiment. [Figure 21] FIG. 10 is a diagram illustrating an example of the configuration of an information processing device according to a fourth embodiment. [Figure 22] FIG. 10 is a diagram illustrating an example of the configuration of a system according to a fifth embodiment. [Figure 23] FIG. 10 is a diagram illustrating an example of the configuration of an information processing device according to a fifth embodiment. [Figure 24] FIG. 13 is a diagram illustrating an example of the configuration of a terminal according to the fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Specific embodiments will be described in detail below with reference to the drawings. In the drawings, identical or corresponding elements are designated by the same reference numerals, and redundant description will be omitted as necessary to simplify the description.

[0013] The embodiments described below may be implemented independently or in appropriate combination. These embodiments have different novel features. Therefore, these embodiments contribute to solving different purposes or problems and to achieving different effects.

[0014] First Embodiment [Configuration and Operation] FIG. 1 shows an example of the configuration of a system according to this embodiment.

[0015] The system 100 shown in FIG. 1 includes a terminal 31, a first antenna 21, a second antenna 22, and an information processing device 1.

[0016] The terminal 31 includes one or more terminals 31. The terminal 31 may be referred to as Mobile Equipment (ME) or User Equipment (UE). The terminal 31 has a communication function for communicating with other devices. The terminal 31 performs wireless communication with the first antenna 21, the second antenna 22, or the information processing device 1. The terminal 31 may perform wireless communication with the information processing device 1 via the first antenna 21 or the second antenna 22. The terminal 31 transmits and receives radio waves to the first antenna 21 or the second antenna 22. The terminal 31 may transmit identification information of the terminal 31 to the first antenna 21 or the second antenna 22. The identification information may be a MAC address. It may be an identifier unique to the terminal 31, or personal information of the user who owns the terminal 31. The personal information may be the telephone number of the terminal 31 or biometric information of the user of the terminal 31.

[0017] The first antenna 21 and the second antenna 22 are connected to the information processing device 1 wirelessly or by wire. The first antenna 21 and the second antenna 22 communicate with the terminal 31 and the information processing device 1. The first antenna 21 and the second antenna 22 transmit and receive radio waves to and from the terminal 31. The first antenna 21 and the second antenna 22 are connected to a wireless local area network (LAN) access point. It may be an antenna at a base station, an antenna in a distributed antenna system (DAS), or an antenna at a base station. DAS distributes radio waves received from a base station to multiple antennas via optical fiber cables, The first antenna 21 and the second antenna 22 transmit and receive radio waves to and from the terminal 31. The first antenna 21 and the second antenna 22 may receive identification information of the terminal 31 from the terminal 31. The identification information may be a MAC address or a It may be an identifier unique to terminal 31, or it may be personal information of the user who holds terminal 31. The personal information may be the telephone number of terminal 31 or biometric information of the user of terminal 31.

[0018] Each of the first antenna 21 and the second antenna 22 measures the radio wave intensity of radio waves received from the terminal 31. Each of the first antenna 21 and the second antenna 22 measures the radio wave intensity of the terminal 31. Each of the first antenna 21 and the second antenna 22 may associate the measured radio wave intensity of the terminal 31 with the received identification information of the terminal 31 and transmit them to the information processing device 1. Each of the first antenna 21 and the second antenna 22 may associate the radio wave intensity of the terminal 31, the identification information of the terminal 31, and the identification information of each antenna and transmit them to the information processing device 1. For example, the first antenna 21 may associate the radio wave intensity of the terminal 31, the identification information of the terminal 31, and the identifier "ANT_21" of the first antenna 21 with each other and transmit them to the information processing device 1. The second antenna 22 may associate the radio wave intensity of the terminal 31, the identification information of the terminal 31, and the identifier "ANT_22" of the second antenna 22 with each other and transmit them to the information processing device 1.

[0019] The first antenna 21 and the second antenna 22 transmit and receive radio waves to and from each other. The first antenna 21 and the second antenna 22 may transmit identification information of each antenna when transmitting radio waves to each other. The identification information may be an identifier unique to each antenna. For example, the first antenna 21 may transmit an identifier "ANT_21" to the second antenna 22 as the identification information of the first antenna 21. The second antenna 22 may transmit an identifier "ANT_22" to the first antenna 21 as the identification information of the second antenna 22.

[0020] The first antenna 21 measures the radio wave intensity of the radio waves received from the second antenna 22. The first antenna 21 may associate the measured radio wave intensity of the second antenna 22 with the received identification information of the second antenna 22 and transmit them to the information processing device 1. The first antenna 21 may associate the radio wave intensity of the second antenna 22, the identification information of the second antenna 22, and the identification information of the first antenna 21 and transmit them to the information processing device 1. For example, the first antenna 21 may associate the radio wave intensity of the second antenna 22 with the identifier "ANT_22" of the second antenna 22 and the identifier "ANT_21" of the first antenna 21 and transmit them to the information processing device 1.

[0021] The second antenna 22 measures the radio wave intensity of the radio waves received from the first antenna 21. The second antenna 22 may associate the measured radio wave intensity of the first antenna 21 with the received identification information of the first antenna 21 and transmit them to the information processing device 1. The second antenna 22 may associate the radio wave intensity of the first antenna 21 with the identification information of the first antenna 21 and the identification information of the second antenna 22 and transmit them to the information processing device 1. For example, the second antenna 22 may associate the radio wave intensity of the first antenna 21 with the identifier "ANT_21" of the first antenna 21 and the identifier "ANT_22" of the second antenna 22 and transmit them to the information processing device 1.

[0022] The information processing device 1 is connected to the first antenna 21 and the second antenna 22 wirelessly or via a wire. The information processing device 1 has a communication function for communicating with other devices. The information processing device 1 may perform wireless or wired communication with the first antenna 21 and the second antenna 22. The information processing device 1 may perform wireless communication with the terminal 31 via the first antenna 21 or the second antenna 22.

[0023] The information processing device 1 may control the first antenna 21 and the second antenna 22. As part of this control, the information processing device 1 may, for example, cause the first antenna 21 and the second antenna 22 to transmit radio wave intensity.

[0024] The information processing device 1 acquires the radio wave intensity of the terminal 31 at the first antenna 21 and the second antenna 22 that transmit and receive radio waves to and from the terminal 31. The information processing device 1 acquires the radio wave intensity of the terminal 31 at the first antenna 21 from the first antenna 21. The information processing device 1 acquires the radio wave intensity of the terminal 31 at the second antenna 22 from the second antenna 22.

[0025] The information processing device 1 acquires the radio wave intensity between the first antenna 21 and the second antenna 22. The information processing device 1 acquires the radio wave intensity of the second antenna 22 at the first antenna 21 from the first antenna 21. The information processing device 1 acquires the radio wave intensity of the first antenna 21 at the second antenna 22 from the second antenna 22.

[0026] When a predetermined condition is satisfied, the information processing device 1 calculates a coefficient representing the radio wave conditions around the antennas based on the radio wave intensity between the first antenna 21 and the second antenna 22. The case where the predetermined condition is satisfied may be when the first antenna 21 or the second antenna 22 is affected by an external factor. The coefficient representing the radio wave conditions around the antenna is calculated for each of the first antenna and the second antenna. When the first antenna 21 is affected by an external factor, the information processing device 1 calculates a coefficient representing the radio wave conditions around the first antenna 21. When the second antenna 22 is affected by an external factor, the information processing device 1 calculates a coefficient representing the radio wave conditions around the second antenna 22. When the first antenna 21 and the second antenna 22 are affected by an external factor, the information processing device 1 calculates a coefficient representing the radio wave conditions around the first antenna 21 and a coefficient representing the radio wave conditions around the second antenna 22. When the first antenna 21 is not affected by an external factor, the information processing device 1 does not need to calculate the coefficient representing the radio wave conditions around the first antenna 21. When the second antenna 22 is not affected by external factors, the information processing device 1 does not need to calculate a coefficient representing the radio wave conditions around the second antenna 22. When the coefficient representing the radio wave conditions around the antenna is not calculated, the information processing device 1 may use the integer "1" as the coefficient.

[0027] The external factor may be an obstacle around each of the first antenna 21 and the second antenna 22 or the terminal 31. The obstacle may be one or more movable objects. The one or more movable objects may be one or more obstructions. The obstruction may be, for example, the terminal 31, a communication device, a person (e.g., a user of the terminal 31 or the communication device), an animal, a robot, a panel, a cart, or other object. Additionally or alternatively, the external factor may be radio wave interference around each of the antennas or the terminal 31, heavy traffic around each of the antennas or the terminal 31, or the temperature or humidity around each of the antennas or the terminal 31.

[0028] A case where an external factor is affecting the radio wave strength of the first antenna 21 or the second antenna 22 is a case where the external factor is affecting the radio wave strength of the first antenna 21 or the second antenna 22. A case where an external factor is affecting the radio wave strength of the first antenna 21 or the second antenna 22 may be a case where the radio wave strength of the first antenna 21 or the second antenna 22 is measured to be lower or higher than a normal value due to an external factor, for example.

[0029] An example of an external factor affecting the radio wave intensity of the first antenna 21 or the second antenna 22 may be, for example, a case where obstacles are concentrated around the first antenna 21 or the second antenna 22 (or where the area around the first antenna 21 or the second antenna 22 is congested). An example of an obstacle concentration around the first antenna 21 or the second antenna 22 (or where the area around the first antenna 21 or the second antenna 22 is congested) may be, for example, a case where there are a predetermined number or more of obstacles around the first antenna 21 or the second antenna 22, or a case where obstacles occupy a predetermined percentage or more of the area around the first antenna 21 or the second antenna 22. The predetermined number may be, for example, 10, but is not limited to this. The predetermined percentage may be, for example, 12%, but is not limited to this. The number of obstacles around each antenna or the percentage of obstacles occupying the area around each antenna may be obtained using, for example, various sensors installed around each antenna, or may be obtained by other methods. The information processing device 1 may acquire information indicating the number of obstacles around each antenna or the proportion of obstacles occupying the area around each antenna, and determine whether or not each antenna is affected by external factors based on the information.The information processing device 1 may receive information indicating whether or not each antenna is affected by external factors from another device, and determine whether or not each antenna is affected by external factors (i.e., whether or not a predetermined condition is met) based on the information.

[0030] An external factor affecting the radio wave intensity of the first antenna 21 or the second antenna 22 may be, for example, a case where radio wave interference occurs around the first antenna 21 or the second antenna 22, a case where traffic via the first antenna 21 or the second antenna 22 is congested, or a case where a change in temperature or humidity occurs around the first antenna 21 or the second antenna 22. A case where a change in temperature or humidity occurs may be a case where the amount of change in temperature or humidity around the first antenna 21 or the second antenna 22 within a predetermined period exceeds a threshold.

[0031] The information processing device 1 corrects the radio wave intensity of the terminal 31 using a coefficient that represents the radio wave conditions around the antenna.

[0032] The information processing device 1 may be a slave device in a DAS, a wireless LAN access point, a base station, or a general-purpose server.

[0033] FIG. 2 is a diagram showing an example of the configuration of an information processing device according to this embodiment.

[0034] The information processing device 1 shown in Fig. 2 is the same as or corresponds to the information processing device 1 shown in Fig. 1. The information processing device 1 includes a communication unit 11, a coefficient calculation unit 12, and a calculation unit 13.

[0035] The communication unit 11 receives, from each of the first antenna 21 and the second antenna 22 in FIG. 1 , the radio wave strength of the terminal 31 measured by each antenna and the identification information of the terminal 31. In this case, the radio wave strength of the terminal 31 and the identification information of the terminal 31 may be associated with each other. The communication unit 11 may receive, from each of the first antenna 21 and the second antenna 22, the radio wave strength of the terminal 31 measured by each antenna, the identification information of the terminal 31, and the identification information of each antenna. In this case, the radio wave strength of the terminal 31, the identification information of the terminal 31, and the identification information of each antenna may be associated with each other. For example, the communication unit 11 may receive, from the first antenna 21, information in which the radio wave strength of the terminal 31, the identification information of the terminal 31, and the identifier "ANT_21" of the first antenna 21 are associated with each other. The communication unit 11 may receive, from the second antenna 22, information in which the radio wave strength of the terminal 31, the identification information of the terminal 31, and the identifier "ANT_22" of the second antenna 22 are associated with each other. The communication unit 11 acquires the radio wave intensity of the terminal 31 at the first antenna 21 and the second antenna 22 that transmit and receive radio waves to and from the terminal 31, and the radio wave intensity between the first antenna 21 and the second antenna 22.

[0036] The radio wave strength between each antenna includes two types: a reference radio wave strength 60 between each antenna measured in the first state, and a radio wave strength 70 between each antenna measured in the second state.

[0037] The first state may be a state in which no obstacles exist around the first antenna 21 and the second antenna 22. The obstacles may be one or more movable objects. The movable objects may be the terminal 31, a communication device, a person (e.g., a user, customer, or employee of the terminal 31 or the communication device), an animal, a robot, or an obstruction such as a panel. In addition to or instead of the above-described states, the first state may be a state in which there is no radio wave interference, traffic congestion, or temperature or humidity change in the first antenna 21 or the second antenna 22. A state in which there is no temperature or humidity change may be a state in which the amount of temperature or humidity change around the first antenna 21 or the second antenna 22 within a predetermined period is within a threshold. For example, the reference radio wave intensity 60 between the antennas in the first state is measured in a state as shown in FIG. 3. FIG. 3 is a diagram showing an example of measurement of the reference radio wave intensity 60 between the antennas in the first state according to this embodiment. Taking a shopping mall as an example, the reference signal strength 60 between each antenna may be measured before opening or after closing, or during a time when there are no employees or customers. The reference signal strength 60 between each antenna may be measured periodically. Examples of periodic measurement include, but are not limited to, measurement once a day, once a week, or once a month. The reference signal strength 60 between each antenna measured in the first state includes the reference signal strength 61 of the first antenna 21 at the second antenna 22 and the reference signal strength 62 of the second antenna 22 at the first antenna 21.

[0038] The second state may be a state in which a terminal 31 or an obstacle 32 is present around the first antenna 21 or the second antenna 22. The obstacle 32 may be one or more movable objects. The movable object may be the terminal 31, a communication device, a person (e.g., a user, customer, or employee of the terminal 31 or the communication device), an animal, a robot, or an obstructing object such as a panel. In addition to or instead of the above-mentioned states, the second state may be a state in which radio wave interference, traffic congestion, or a change in temperature or humidity is present in the first antenna 21 or the second antenna 22. The state in which a change in temperature or humidity is present may be a state in which the amount of change in temperature or humidity around the first antenna 21 or the second antenna 22 within a predetermined period exceeds a threshold. For example, the radio wave intensity 70 between the antennas in the second state is measured in a state as shown in FIG. 4. FIG. 4 is a diagram illustrating an example of measurement of the radio wave intensity 70 between the antennas in the second state according to the first embodiment. Taking a shopping mall as an example, the radio wave strength 70 between each antenna may be measured while the shopping mall is open, or during times when there are customers or when there are many customers. The measurement of the radio wave strength 70 between each antenna may be performed periodically. Examples of periodic measurement include, but are not limited to, measurement every second, every hour, or every day. The measurement interval for the radio wave strength 70 between each antenna may be set shorter than the measurement interval for the reference radio wave strength 60 between each antenna. The shorter the measurement interval for the radio wave strength 70 between each antenna, the more real-time the information processing device 1 can obtain information. The radio wave strength 70 between each antenna measured in the second state includes the radio wave strength 71 of the first antenna 21 at the second antenna 22 and the radio wave strength 72 of the second antenna 22 at the first antenna 21.

[0039] The communication unit 11 may acquire a round trip time (RTT) between the first antenna 21 and the second antenna 22 instead of the radio wave intensity between the first antenna 21 and the second antenna 22. The RTT is the time it takes for a response to be returned after a signal or data is transmitted to a communication partner. RTT is the time it takes to receive a packet. It depends on the number of devices, processing time, etc.

[0040] The RTT between each antenna includes two types: a reference RTT 80 between each antenna measured in the first state, and an RTT 90 between each antenna measured in the second state.

[0041] Measurement of the reference RTT 80 between each antenna may be performed periodically. Examples of measurement frequencies include, but are not limited to, measurements every day, every week, or every month. The reference RTT 80 between each antenna measured in the first state includes the RTT 80 between the second antenna and the RTT 80 between the first antenna and the RTT 80 between the second antenna. The reference RTT 81 of the first antenna 21 in the antenna 22 and the reference RTT 82 of the second antenna in the first antenna 21 and the reference RTT 82 of the antenna 22.

[0042] Measurement of RTT90 between each antenna may be performed periodically. The RTT 90 between the antennas measured in the second state may include, but is not limited to, measurements every second, every hour, or every day. and an RTT 92 of the second antenna 22 in the first antenna 21.

[0043] The coefficient calculation unit 12 acquires the radio wave strength between each antenna from the communication unit 11. When a predetermined condition is satisfied, the coefficient calculation unit 12 calculates a coefficient representing the radio wave conditions around the antennas based on the radio wave strength between each antenna. When a predetermined condition is satisfied, the coefficient calculation unit 12 calculates a coefficient representing the radio wave conditions around the antennas based on the reference radio wave strength 60 between each antenna and the radio wave strength 70 between each antenna. When a predetermined condition is satisfied, the coefficient calculation unit 12 may calculate ...70 between each antenna. When a predetermined condition is satisfied, the coefficient calculation unit 12 may calculate a coefficient representing the radio wave conditions around the antennas based on the reference radio wave strength 70 between each antenna. When a predetermined condition is satisfied, the coefficient calculation unit 12 may calculate a coefficient representing the radio wave conditions around the antennas based on the reference radio wave strength 70 between each antenna. When a predetermined condition is satisfied, the coefficient calculation unit 12 may

[0044] The external factor may be an obstacle around each of the first antenna 21 and the second antenna 22 or the terminal 31. The obstacle may be one or more movable objects. The movable object may be the terminal 31, a communication device, a person (e.g., a user, a customer, an employee, etc. of the terminal 31 or the communication device), an animal, a robot, or an obstruction such as a panel. Additionally or alternatively, the external factor may be radio wave interference around each of the antennas or the terminal 31, heavy traffic around each of the antennas or the terminal 31, or temperature or humidity around each of the antennas or the terminal 31.

[0045] The case where there is an influence of an external factor is when the external factor affects the radio wave strength of the first antenna 21 or the second antenna 22. For example, this is the case where the radio wave strength of the first antenna 21 or the second antenna 22 is measured as being lower or higher than the normal value due to an external factor.

[0046] A coefficient representing the radio wave conditions around the antenna is calculated for each antenna. Hereinafter, the coefficient representing the radio wave conditions around the first antenna 21 will be referred to as the first antenna coefficient. The coefficient representing the radio wave conditions around the second antenna 22 will be referred to as the second antenna coefficient.

[0047] The coefficient calculation unit 12 calculates the first antenna coefficient by dividing the reference radio wave intensity 61 received by the second antenna 22 from the first antenna 21 by the radio wave intensity 71 received by the second antenna 22 from the first antenna 21. The coefficient calculation unit 12 calculates the second antenna coefficient by dividing the reference radio wave intensity 62 received by the first antenna 21 from the second antenna 22 by the radio wave intensity 72 received by the first antenna 21 from the second antenna 22.

[0048] The method of calculating the first antenna coefficient and the second antenna coefficient in the coefficient calculation unit 12 is not limited to the above. The coefficient calculation unit 12 may calculate the first antenna coefficient and the second antenna coefficient based on the difference between the reference radio wave strength 60 between each antenna and the radio wave strength 70 between each antenna. The coefficient calculation unit 12 may calculate the first antenna coefficient and the second antenna coefficient based on a table in which the correspondence between the difference between the reference radio wave strength 60 between each antenna and the radio wave strength 70 between each antenna and each antenna coefficient is predetermined. The coefficient calculation unit 12 may obtain the comparison table from an external source. The coefficient calculation unit 12 may store the comparison table in the coefficient calculation unit 12 in advance. The coefficient calculation unit 12 may obtain the comparison table from a storage unit. The coefficient calculation unit 12 calculates the reference RTT 81 received by the second antenna 22 from the first antenna 21 based on the reference RTT 81 received by the second antenna 22 from the second antenna 22. The first antenna coefficient can be calculated by dividing by the RTT received from the first antenna (21) (91). The coefficient calculation unit 12 calculates the reference RTT8 received by the first antenna 21 from the second antenna 22. 2 by the RTT 92 received by the first antenna 21 from the second antenna 22, The coefficient calculation unit 12 may calculate the first antenna coefficient and the second antenna coefficient based on the radio wave strength of the terminal 31 or the transition of the radio wave strength 70 between the antennas. The coefficient calculation unit 12 may calculate the first antenna coefficient and the second antenna coefficient based on past location information of the terminal 31. The coefficient calculation unit 12 may calculate the first antenna coefficient and the second antenna coefficient based on past coefficients. For example, assume that the coefficient calculation unit 12 calculates a tentative first antenna coefficient using one of the coefficient calculation methods described above. The past coefficients are the past first antenna coefficient and the past second antenna coefficient calculated before the calculation. The coefficient calculation unit 12 may calculate the average of the past first antenna coefficient and the tentative first antenna coefficient as the first antenna coefficient. Furthermore, the coefficient calculation unit 12 may calculate the average of the past second antenna coefficient and the tentative second antenna coefficient as the second antenna coefficient.

[0049] The calculation unit 13 acquires the radio wave strength of the terminal 31 at the first antenna 21 and the second antenna 22 from the communication unit 11. Furthermore, the calculation unit 13 acquires the first antenna coefficient and the second antenna coefficient from the coefficient calculation unit 12. The calculation unit 13 corrects the radio wave strength of the terminal 31 based on the first antenna coefficient and the second antenna coefficient.

[0050] The calculation unit 13 corrects the radio wave strength of the terminal 31 at the first antenna 21 by multiplying the radio wave strength of the terminal 31 at the first antenna 21 by the first antenna coefficient. The calculation unit 13 corrects the radio wave strength of the terminal 31 at the second antenna 22 by multiplying the radio wave strength of the terminal 31 at the second antenna 22 by the second antenna coefficient.

[0051] The method of correcting the radio wave strength of the terminal 31 in the calculation unit 13 is not limited to the above. For example, the calculation unit 13 may correct the radio wave strength of the terminal 31 by adding or multiplying the radio wave strength of the terminal 31 by a correction value selected by referring to a predetermined correspondence table. The correspondence table may be a correspondence table between the difference between the reference radio wave strength 60 between each antenna and the radio wave strength 70 between each antenna and the correction value. The correspondence table may be a correspondence table between the first antenna coefficient and the second antenna coefficient and the correction value. The selection of the correction value may be performed by the calculation unit 13 or the coefficient calculation unit 12. [Processing flow example] FIG. 5 is a flowchart showing an example of processing executed by the information processing device 1 according to this embodiment.

[0052] The information processing device 1 starts the process shown in FIG. 5, for example, upon input of start information from an external device.

[0053] In the process of S101, the communication unit 11 acquires the radio wave strength from the terminal 31 and the radio wave strength between each antenna. The radio wave strength from the terminal 31 includes the radio wave strength at the first antenna 21 and the radio wave strength at the second antenna 22. The radio wave strength between each antenna includes two types: a reference radio wave strength 60 between each antenna measured in a first state, and a radio wave strength 70 between each antenna measured in a second state. The communication unit 11 may determine whether to correct the radio wave strength of the terminal 31 before the process of S101.

[0054] If the communication unit 11 does not acquire the radio wave intensity of the terminal 31 in the processing of S101, the information processing device 1 may not perform the subsequent processing. If the communication unit 11 does not acquire the radio wave intensity between the antennas in the processing of S101, the information processing device 1 may not perform the subsequent processing. Furthermore, if a predetermined condition is not satisfied, the information processing device 1 may not perform the subsequent processing. The case where the predetermined condition is not satisfied may be a case where there is no influence of an external factor on the first antenna 21 or the second antenna 22.

[0055] In the process of S102, the coefficient calculation unit 12 calculates a coefficient representing the radio wave conditions around the antennas based on the reference radio wave strength 60 between the antennas and the radio wave strength 70 between the antennas.

[0056] Details of the process of S102 are as shown in FIG. 6. FIG. 6 is a flowchart showing an example of a coefficient calculation process executed by the information processing device 1 according to this embodiment. In the process of S121, the coefficient calculation unit 12 acquires radio wave strength between each antenna from the communication unit 11. The radio wave strength between each antenna includes a reference radio wave strength 60 between each antenna and a radio wave strength 70 between each antenna. In the process of S122, the coefficient calculation unit 12 calculates a first antenna coefficient. The coefficient calculation unit 12 calculates the first antenna coefficient by dividing the reference radio wave strength 61 received by the second antenna 22 from the first antenna 21 by the radio wave strength 71 received by the second antenna 22 from the first antenna 21. In the process of S123, the coefficient calculation unit 12 calculates a second antenna coefficient. The coefficient calculation unit 12 calculates the second antenna coefficient by dividing the reference radio wave strength 62 received by the first antenna 21 from the second antenna 22 by the radio wave strength 72 received by the first antenna 21 from the second antenna 22. The order of the process of S122 and the process of S123 does not matter. When S123 ends, S103 in FIG.

[0057] The information processing device 1 may determine that there is no influence of external factors when the first antenna coefficient and the second antenna coefficient calculated by the coefficient calculation unit 12 in the process of S102 are smaller than a predetermined value. If it is determined that there is no influence of external factors, the information processing device 1 may not perform subsequent processes. If the first antenna coefficient and the second antenna coefficient calculated by the coefficient calculation unit 12 in the process of S102 are larger than a predetermined value, the information processing device 1 may determine that correction is not to be performed. If it is determined that correction is not to be performed, the information processing device 1 may not perform subsequent processes.

[0058] In the process of S103, the calculation unit 13 corrects the radio wave strength of the terminal 31 based on a coefficient representing the radio wave conditions around the antenna. The calculation unit 13 acquires the radio wave strength of the terminal 31 from the communication unit 11. The calculation unit 13 acquires the coefficient representing the radio wave conditions around the antenna from the coefficient calculation unit 12.

[0059] Details of the processing of S103 are as shown in FIG. 7. FIG. 7 is a flowchart showing an example of a radio wave strength correction processing executed by the information processing device 1 according to this embodiment. As the processing of S131, the calculation unit 13 corrects the radio wave strength of the terminal 31 at the first antenna 21. The calculation unit 13 corrects the radio wave strength of the terminal 31 at the first antenna 21 by multiplying the radio wave strength of the terminal 31 at the first antenna 21 by the first antenna coefficient. As the processing of S132, the calculation unit 13 corrects the radio wave strength of the terminal 31 at the second antenna 22. The calculation unit 13 corrects the radio wave strength of the terminal 31 at the second antenna 22 by multiplying the radio wave strength of the terminal 31 at the second antenna 22 by the second antenna coefficient. Note that the order of the processing of S131 and the processing of S132 does not matter.

[0060] When the calculation unit 13 corrects the radio wave intensity of the terminal 31 at each antenna in S103, the information processing device 1 ends the processing shown in FIG.

[0061] [effect] The information processing device of the first embodiment calculates a coefficient representing the radio wave conditions around the antennas based on the radio wave strength between the antennas, and corrects the radio wave strength of the terminal by multiplying the radio wave strength of the terminal at each antenna by the coefficient representing the radio wave conditions around the antenna. The coefficient representing the radio wave conditions around the antenna is calculated depending on the influence of external factors such as obstacles and radio wave interference around each antenna or terminal. Therefore, the information processing device can appropriately correct the radio wave strength based on the influence of external factors.

[0062] Second Embodiment Next, a second embodiment of the present disclosure will be described with reference to the drawings. A system 102 of the second embodiment differs from the system 100 of the first embodiment in that it includes a third antenna 23 in addition to the components of the system 100 of the first embodiment, and the information processing device 1 in the first embodiment is replaced with an information processing device 2.

[0063] The following will be described in detail with reference to the drawings. Note that, in the following, the same components as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

[0064] [Configuration and Operation] FIG. 8 is a diagram showing an example of the configuration of a system 102 according to this embodiment.

[0065] The system 102 shown in FIG. 8 includes a terminal 31, a first antenna 21, a second antenna 22, a third antenna 23, and an information processing device 2.

[0066] The third antenna 23 is connected to the information processing device 2 wirelessly or by wire. The third antenna 23 communicates with the terminal 31 or the information processing device 2. The third antenna 23 may be an antenna of a wireless local area network (LAN) access point, or may be an antenna of a distributed antenna system. It may be each antenna in a Distributed Antenna System (DAS), or The third antenna 23 transmits and receives radio waves to and from the terminal 31. The third antenna 23 may receive identification information of the terminal 31 from the terminal 31. The identification information may be a MAC address, an identifier unique to the terminal 31, or a unique identifier of the terminal 31. The personal information may be the telephone number of the terminal 31 or the biometric information of the user of the terminal 31.

[0067] Each of the first antenna 21, the second antenna 22, and the third antenna 23 measures the radio wave intensity of radio waves received from the terminal 31. Each of the first antenna 21, the second antenna 22, and the third antenna 23 measures the radio wave intensity of the terminal 31. Each of the first antenna 21, the second antenna 22, and the third antenna 23 associates the measured radio wave intensity of the terminal 31 with the received identification information of the terminal 31 and transmits them to the information processing device 2. Each of the first antenna 21, the second antenna 22, and the third antenna 23 may associate the radio wave intensity of the terminal 31, the identification information of the terminal 31, and the identification information of each antenna and transmit them to the information processing device 2. For example, the third antenna 23 may associate the radio wave intensity of the terminal 31, the identification information of the terminal 31, and the third antenna 23 identifier "ANT_23" and transmit them to the information processing device 2.

[0068] The first antenna 21, the second antenna 22, and the third antenna 23 transmit and receive radio waves to and from each other. The first antenna 21, the second antenna 22, and the third antenna 23 may transmit identification information of each antenna when transmitting radio waves to each other. The identification information may be an identifier unique to each antenna. For example, the third antenna 23 may transmit the identifier "ANT_23" to the first antenna 21 or the second antenna 22 as identification information of the third antenna 23.

[0069] The first antenna 21 measures the radio wave intensity of the radio waves received from the third antenna 23. The third antenna 23 measures the radio wave intensity of the radio waves received from the first antenna 21. The first antenna 21 associates the measured radio wave intensity of the third antenna 23 with the received identification information of the third antenna 23 and transmits them to the information processing device 2. The third antenna 23 associates the measured radio wave intensity of the first antenna 21 with the received identification information of the first antenna 21 and transmits them to the information processing device 2. The first antenna 21 may associate the radio wave intensity of the third antenna 23, the identification information of the third antenna 23, and the identification information of the first antenna 21 and transmit them to the information processing device 2. The third antenna 23 may associate the radio wave intensity of the first antenna 21, the identification information of the first antenna 21, and the identification information of the third antenna 23 and transmit them to the information processing device 2. For example, the first antenna 21 may associate the radio wave intensity of the third antenna 23, the identifier “ANT_23” of the third antenna 23, and the identifier “ANT_21” of the first antenna 21, and transmit them to the information processing device 2. The third antenna 23 may associate the radio wave intensity of the first antenna 21, the identifier “ANT_21” of the first antenna 21, and the identifier “ANT_23” of the third antenna 23, and transmit them to the information processing device 2.

[0070] The second antenna 22 measures the radio wave intensity of the radio waves received from the third antenna 23. The third antenna 23 measures the radio wave intensity of the radio waves received from the second antenna 22. The second antenna 22 associates the measured radio wave intensity of the third antenna 23 with the received identification information of the third antenna 23 and transmits them to the information processing device 2. The third antenna 23 associates the measured radio wave intensity of the second antenna 22 with the received identification information of the second antenna 22 and transmits them to the information processing device 2. The second antenna 22 may associate the radio wave intensity of the third antenna 23 with the identification information of the third antenna 23 and the identification information of the second antenna 22 and transmit them to the information processing device 2. The third antenna 23 may associate the radio wave intensity of the second antenna 22 with the identification information of the second antenna 22 and the identification information of the third antenna 23 and transmit them to the information processing device 2. For example, the second antenna 22 may associate the radio wave intensity of the third antenna 23, the identifier “ANT_23” of the third antenna 23, and the identifier “ANT_22” of the second antenna 22, and transmit them to the information processing device 2. The third antenna 23 may associate the radio wave intensity of the second antenna 22, the identifier “ANT_22” of the second antenna 22, and the identifier “ANT_23” of the third antenna 23, and transmit them to the information processing device 2.

[0071] In addition to the configuration of the information processing device 1 in the first embodiment, the information processing device 2 is connected to a third antenna 23 wirelessly or via a wire. In addition to the operations of the information processing device 1 in the first embodiment, the information processing device 2 performs the following operations. The information processing device 2 performs wireless communication with the third antenna 23. The information processing device 2 may perform wireless communication with the terminal 31 via the third antenna 23. The information processing device 2 may control the third antenna 23. As part of this control, the information processing device 2 may, for example, cause the third antenna 23 to transmit radio wave intensity. The information processing device 2 may acquire the radio wave intensity of the terminal 31 at the third antenna 23, which transmits and receives radio waves to and from the terminal 31. The information processing device 2 may acquire the radio wave intensity among the first antenna 21, the second antenna 22, and the third antenna 23. When a predetermined condition is satisfied, the information processing device 2 calculates a coefficient representing the radio wave conditions around the antennas based on the radio wave intensity among the first antenna 21, the second antenna 22, and the third antenna 23. The case where a predetermined condition is satisfied may be the case where an external factor is affecting the first antenna 21, the second antenna 22, or the third antenna 23. The information processing device 2 corrects the radio wave intensity of the terminal 31 based on the degree of influence of the external factor. The information processing device 1 may be a slave device in a DAS, a wireless LAN access point, or a base station.

[0072] FIG. 9 is a diagram showing an example of the configuration of an information processing device 2 according to this embodiment.

[0073] The information processing device 2 shown in Fig. 9 is the same as or corresponds to the information processing device 2 shown in Fig. 8. The information processing device 2 includes a communication unit 112, a coefficient calculation unit 122, a calculation unit 132, and a position estimation unit 142.

[0074] The communication unit 112 performs the following operations in addition to the operations of the communication unit 11 in the first embodiment. Receives the measured radio wave strength of the terminal 31 and the identification information of the terminal 31 from the third antenna 23. In this case, the radio wave strength of the terminal 31 and the identification information of the terminal 31 may be associated with each other. The communication unit 112 may receive the measured radio wave strength of the terminal 31, the identification information of the terminal 31, and the identification information of the third antenna 23 from the third antenna 23. In this case, the radio wave strength of the terminal 31, the identification information of the terminal 31, and the identification information of the third antenna 23 may be associated with each other. For example, the communication unit 112 may receive information from the third antenna 23 in which the radio wave strength of the terminal 31, the identification information of the terminal 31, and the identifier "ANT_23" of the third antenna 23 are associated with each other. The communication unit 112 acquires the radio wave strength of the terminal 31 at the first antenna 21, the second antenna 22, and the third antenna 23, which transmit and receive radio waves to and from the terminal 31, and the radio wave strength between the first antenna 21, the second antenna 22, and the third antenna 23.

[0075] The radio wave strength between each antenna includes two types: reference radio wave strength 602 between each antenna measured in the first state, and radio wave strength 702 between each antenna measured in the second state.

[0076] The first state in this embodiment may be a state in which no obstacles exist around the first antenna 21, the second antenna 22, and the third antenna 23. The obstacles may be one or more movable objects. The movable objects may be the terminal 31, the communication device, a person (e.g., a user, customer, or employee of the terminal 31 or the communication device), an animal, a robot, or an obstruction such as a panel. In addition to or instead of the above states, the first state may be a state in which there is no radio wave interference, traffic congestion, or temperature or humidity change in the first antenna 21, the second antenna 22, or the third antenna 23. The state in which there is no temperature or humidity change may be a state in which the amount of temperature or humidity change around the first antenna 21, the second antenna 22, or the third antenna 23 within a predetermined period is within a threshold. FIG. 10 is a diagram showing an example of measurement results of the reference radio wave intensity 602 between the antennas in the first state according to this embodiment. The reference radio wave strength 602 between each antenna measured in the first state includes a reference radio wave strength 621 of the second antenna 22 at the first antenna 21, a reference radio wave strength 631 of the third antenna 23 at the first antenna 21, a reference radio wave strength 612 of the first antenna 21 at the second antenna 22, a reference radio wave strength 632 of the third antenna 23 at the second antenna 22, a reference radio wave strength 613 of the first antenna 21 at the third antenna 23, and a reference radio wave strength 623 of the second antenna 22 at the third antenna 23.

[0077] The second state in this embodiment may be a state in which a terminal 31 or an obstacle is present around the first antenna 21, the second antenna 22, or the third antenna 23. The obstacle may be one or more movable objects. The movable object may be the terminal 31, a communication device, a person (e.g., a user, customer, or employee of the terminal 31 or the communication device), an animal, a robot, or an obstruction such as a panel. In addition to or instead of the above-mentioned states, the second state may be a state in which radio wave interference, traffic congestion, or a change in temperature or humidity is present in the first antenna 21, the second antenna 22, or the third antenna 23. The state in which a change in temperature or humidity is present may be a state in which the amount of change in temperature or humidity around the first antenna 21, the second antenna 22, or the third antenna 23 within a predetermined period exceeds a threshold. FIG. 11 is a diagram illustrating an example of measurement results of radio wave intensity 702 between antennas in the second state according to the second embodiment. The radio wave strength 702 between each antenna measured in the second state includes radio wave strength 721 of the second antenna 22 at the first antenna 21, radio wave strength 731 of the third antenna 23 at the first antenna 21, radio wave strength 712 of the first antenna 21 at the second antenna 22, radio wave strength 732 of the third antenna 23 at the second antenna 22, radio wave strength 713 of the first antenna 21 at the third antenna 23, and radio wave strength 723 of the second antenna 22 at the third antenna 23.

[0078] The communication unit 112 may acquire the RTT (Round Trip Time) between the first antenna 21, the second antenna 22, and the third antenna 23.

[0079] The RTT between each antenna includes two types: a reference RTT 802 between each antenna measured in the first state, and an RTT 902 between each antenna measured in the second state.

[0080] Measurement of the reference RTT 802 between each antenna may be performed periodically. For example, the measurement frequency may be, but is not limited to, daily, weekly, or monthly. The reference RTT 802 between each antenna measured in the first state includes the first The reference RTT 821 of the second antenna 22 in the antenna 21 and the reference RTT 822 of the first antenna 21 The reference RTT 831 of the third antenna 23 and the reference RTT 832 of the first antenna 21 in the second antenna 22 quasi-RTT 812, a reference RTT 832 of the third antenna 23 at the second antenna 22, a reference RTT 813 of the first antenna 21 at the third antenna 23, and a reference RTT 814 of the third antenna 23 at the third antenna 23. 2 antenna 22 reference 823 and.

[0081] The measurement of RTT 902 between each antenna may be performed periodically. Examples of the measurement frequency include, but are not limited to, measurements every second, every hour, or every day. The radio wave strength 902 between the antennas measured in the second state includes the RTT 921 of the second antenna 22 at the first antenna 21 and the RTT 922 of the third antenna at the first antenna 21. RTT 931 of the first antenna 21 at the second antenna 22, RTT 912 of the third antenna 23 at the second antenna 22, RTT 932 of the first antenna 21 at the third antenna 23, The RTT 913 of the antenna 21 and the RTT 923 of the second antenna 22 at the third antenna 23 are included.

[0082] The coefficient calculation unit 122 acquires the radio wave strength between each antenna from the communication unit 112. When a predetermined condition is satisfied, the coefficient calculation unit 122 calculates a coefficient representing the radio wave conditions around the antennas based on the radio wave strength between each antenna. When a predetermined condition is satisfied, the coefficient calculation unit 122 calculates a coefficient representing the radio wave conditions around the antennas based on the reference radio wave strength 60 between each antenna and the radio wave strength 70 between each antenna. When a predetermined condition is satisfied, it means that the first antenna 21, the second antenna 22, or the third antenna 23 is affected by an external factor.

[0083] The external factor may be an obstacle around each of the first antenna 21, the second antenna 22, and the third antenna 23 or the terminal 31. The obstacle may be one or more movable objects. The movable object may be the terminal 31, a communication device, a person (e.g., a user, a customer, an employee, etc. of the terminal 31 or the communication device), an animal, a robot, or an obstruction such as a panel. Additionally or alternatively, the external factor may be radio wave interference around each of the antennas or the terminal 31, heavy traffic around each of the antennas or the terminal 31, or temperature or humidity around each of the antennas or the terminal 31.

[0084] A case where an external factor is influencing the radio wave strength of the first antenna 21, the second antenna 22, or the third antenna 23 is referred to as a case where the external factor is influencing the radio wave strength of the first antenna 21, the second antenna 22, or the third antenna 23. For example, this is the case where an external factor causes the radio wave strength of the first antenna 21, the second antenna 22, or the third antenna 23 to be measured as being lower or higher than the normal value.

[0085] A coefficient representing the radio wave conditions around the antenna is calculated for each antenna. Hereinafter, the coefficient representing the radio wave conditions around the third antenna 23 will be referred to as the third antenna coefficient.

[0086] The coefficient calculation unit 122 calculates each antenna coefficient. The following Equation 1 shows an example of a coefficient calculation formula according to this embodiment. Here, as an example, a method for calculating each antenna coefficient when the third antenna 23 is affected by an external factor is shown.

[0087]

number

[0088] The coefficient calculation unit 122 calculates the first antenna coefficient by dividing the reference radio wave intensity 631 received by the first antenna 21 from the third antenna 23 by the radio wave intensity 731 received by the first antenna 21 from the third antenna 23. Alternatively, the coefficient calculation unit 122 may calculate the first antenna coefficient by dividing the reference radio wave intensity 613 received by the third antenna 23 from the first antenna 21 by the radio wave intensity 713 received by the third antenna 23 from the first antenna 21.

[0089] The coefficient calculation unit 122 calculates the second antenna coefficient by dividing the reference radio wave intensity 632 received by the second antenna 22 from the third antenna 23 by the radio wave intensity 732 received by the second antenna 22 from the third antenna 23. The coefficient calculation unit 122 also calculates the second antenna coefficient by dividing the reference radio wave intensity 623 received by the third antenna 23 from the second antenna 22 by the radio wave intensity 723 received by the third antenna 23 from the second antenna 22.

[0090] The coefficient calculation unit 122 calculates the third antenna coefficient by taking the average value of the first antenna coefficient and the second antenna coefficient.

[0091] The method of calculating the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient in the coefficient calculation unit 122 is not limited to the above.

[0092] The coefficient calculation unit 122 may calculate the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient based on the difference between the reference radio wave strength 602 between each antenna and the radio wave strength 702 between each antenna. The coefficient calculation unit 122 may calculate the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient based on a table in which the correspondence between the difference between the reference radio wave strength 602 between each antenna and the radio wave strength 702 between each antenna and each antenna coefficient is predetermined. The coefficient calculation unit 122 may obtain the comparison table from an external source. The coefficient calculation unit 122 may store the comparison table in advance in the coefficient calculation unit 122. The coefficient calculation unit 122 may obtain the comparison table from a storage unit.

[0093] The coefficient calculation unit 122 calculates the RTT 831 received by the first antenna 21 from the third antenna 23 as , and the first antenna 21 divides it by the RTT 931 received from the third antenna 23 to obtain the first The coefficient calculation unit 122 may calculate an antenna coefficient by multiplying the reference RTT 813 received by the third antenna 23 from the first antenna 21 by the The first antenna coefficient may be calculated by dividing the received RTT 913.

[0094] The coefficient calculation unit 122 calculates the reference RTT 83 received by the second antenna 22 from the third antenna 23. 2 by the RTT 932 received by the second antenna 22 from the third antenna 23, The coefficient calculation unit 122 may calculate the second antenna coefficient by dividing the reference RTT 823 received by the third antenna 23 from the second antenna 22 by the reference RTT 823 received by the third antenna 23 from the second antenna 22. The second antenna coefficient may be calculated by dividing the received RTT 923 by the RTT 923 received from the

[0095] The coefficient calculation unit 122 may calculate the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient based on the radio wave strength of the terminal 31 or the transition of the radio wave strength 702 between the antennas. The coefficient calculation unit 122 may calculate the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient based on past location information of the terminal 31. The coefficient calculation unit 122 may calculate the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient based on past coefficients. For example, assume that the coefficient calculation unit 122 calculates a tentative first antenna coefficient using one of the coefficient calculation methods described above. The past coefficients are the past first antenna coefficient and the past second antenna coefficient calculated before the calculation. The coefficient calculation unit 122 may calculate the average of the past first antenna coefficient and the tentative first antenna coefficient as the first antenna coefficient. Furthermore, the coefficient calculation unit 122 may calculate the average of the past second antenna coefficient and the tentative second antenna coefficient as the second antenna coefficient. The coefficient calculation unit 122 may calculate the average of the past third antenna coefficient and the tentative third antenna coefficient as the third antenna coefficient.

[0096] The calculation unit 132 acquires the radio wave strength of the terminal 31 at the first antenna 21, the second antenna 22, and the third antenna from the communication unit 112. Furthermore, the calculation unit 132 acquires the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient from the coefficient calculation unit 122. The calculation unit 132 corrects the radio wave strength of the terminal 31 based on the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient.

[0097] The calculation unit 132 corrects the radio wave strength of the terminal 31 at the first antenna 21 by multiplying the radio wave strength of the terminal 31 at the first antenna 21 by the first antenna coefficient. The calculation unit 132 corrects the radio wave strength of the terminal 31 at the second antenna 22 by multiplying the radio wave strength of the terminal 31 at the second antenna 22 by the second antenna coefficient. The calculation unit 132 corrects the radio wave strength of the terminal 31 at the third antenna 23 by multiplying the radio wave strength of the terminal 31 at the third antenna 23 by the third antenna coefficient.

[0098] The method of correcting the radio wave intensity of the terminal 31 in the calculation unit 132 is not limited to the above. For example, the calculation unit 132 may correct the radio wave intensity of the terminal 31 by adding or multiplying the radio wave intensity of the terminal 31 by a correction value selected by referring to a predetermined correspondence table. The correspondence table may be a correspondence table of the difference between the reference radio wave intensity 60 between the antennas and the radio wave intensity 70 between the antennas, and the correction value. The correspondence table may be a correspondence table of the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient, and the correction value. The selection of the correction value may be performed by the calculation unit 132 or the coefficient calculation unit 122.

[0099] The position estimation unit 142 acquires the radio wave intensity of the terminal 31 from the calculation unit 132. The acquired radio wave intensity of the terminal 31 in this case is the radio wave intensity corrected by the calculation unit 132. Furthermore, if a predetermined condition is not satisfied, the position estimation unit 142 acquires the radio wave intensity of the terminal 31 from the communication unit 112. The acquired radio wave intensity of the terminal 31 in this case is the radio wave intensity not corrected by the calculation unit 132. Thereafter, the position estimation unit 142 estimates the position of the terminal 31 by calculating the distance between each antenna and the terminal 31 based on the radio wave intensity of the terminal 31. Here, the radio wave intensity of the terminal 31 includes the radio wave intensity of the terminal 31 at the first antenna 21, the radio wave intensity of the terminal 31 at the second antenna 22, and the radio wave intensity of the terminal 31 at the third antenna 23. The position estimation unit 142 may estimate the position of the terminal 31 using a three-point positioning method. The position estimation unit 142 may transmit the estimated position of the terminal 31 to the terminal via the communication unit 112.

[0100] [Processing flow example] FIG. 12 is a flowchart showing an example of processing executed by the information processing device 2 according to this embodiment.

[0101] The information processing device 2 starts the process shown in FIG. 12, for example, upon receiving start information from an external device.

[0102] In the process of S101, the communication unit 112 acquires the radio wave strength from the terminal 31 and the radio wave strength between each antenna. The radio wave strength from the terminal 31 includes the radio wave strength at the first antenna 21, the radio wave strength at the second antenna 22, and the radio wave strength at the third antenna 23. The radio wave strength between each antenna includes two types: a reference radio wave strength 602 between each antenna measured in a first state, and a radio wave strength 702 between each antenna measured in a second state. Furthermore, the communication unit 112 may determine whether to correct the radio wave strength from the terminal 31 before the process of S101.

[0103] If the communication unit 112 does not acquire the radio wave intensity of the terminal 31 in the processing of S101, the information processing device 2 may not perform the subsequent processing. If the communication unit 112 does not acquire the radio wave intensity between the antennas in the processing of S101, the information processing device 2 may not perform the subsequent processing. Furthermore, if a predetermined condition is not satisfied, the information processing device 2 may not perform the subsequent processing. A case where the predetermined condition is not satisfied may be a case where the first antenna 21, the second antenna 22, or the third antenna 23 is not affected by an external factor.

[0104] In the process of S102, the coefficient calculation unit 122 calculates a coefficient representing the radio wave conditions around the antennas based on the reference radio wave strength 602 between the antennas and the radio wave strength 702 between the antennas.

[0105] Details of the process of S102 are as shown in FIG. 13. FIG. 13 is a flowchart showing an example of a coefficient calculation process executed by the information processing device 2 according to this embodiment. Here, as an example, a calculation flow of each antenna coefficient when the third antenna 23 is affected by an external factor is shown. In the process of S121, the coefficient calculation unit 122 acquires the radio wave strength between each antenna from the communication unit 112. The radio wave strength between each antenna includes the reference radio wave strength 602 between each antenna and the radio wave strength 702 between each antenna. In the process of S122, the coefficient calculation unit 122 calculates the first antenna coefficient. In the process of S123, the coefficient calculation unit 122 calculates the second antenna coefficient. In the process of S124, the coefficient calculation unit 122 calculates the third antenna coefficient. Note that the order of the processes of S122 and S123 does not matter. When S124 ends, S103 in FIG. 12 starts.

[0106] The information processing device 2 may determine that there is no influence of external factors when the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient calculated by the coefficient calculation unit 122 in the process of S102 are smaller than predetermined values. When it is determined that there is no influence of external factors, the information processing device 2 may start the process of S104 without performing the process of S103. Furthermore, when the first antenna coefficient, the second antenna coefficient, and the third antenna coefficient calculated by the coefficient calculation unit 122 in the process of S102 are larger than predetermined values, the information processing device 2 may decide not to perform correction. When it is determined not to perform correction, the information processing device 2 may start the process of S104 without performing the process of S103.

[0107] In the process of S103, the calculation unit 132 corrects the radio wave strength of the terminal 31 based on a coefficient representing the radio wave conditions around the antenna. The calculation unit 132 acquires the radio wave strength of the terminal 31 from the communication unit 112. The calculation unit 132 acquires the coefficient representing the radio wave conditions around the antenna from the coefficient calculation unit 122 or the communication unit 112.

[0108] Details of the processing of S103 are as shown in Fig. 14. Fig. 14 is a flowchart showing an example of a radio wave intensity correction processing executed by the information processing device 2 according to this embodiment. As the processing of S131, the calculation unit 132 corrects the radio wave intensity of the terminal 31 at the first antenna 21. The calculation unit 132 corrects the radio wave intensity of the terminal 31 at the first antenna 21 by multiplying the radio wave intensity of the terminal 31 at the first antenna 21 by the first antenna coefficient. As the processing of S132, the calculation unit 132 corrects the radio wave intensity of the terminal 31 at the second antenna 22. The calculation unit 132 corrects the radio wave intensity of the terminal 31 at the second antenna 22 by multiplying the radio wave intensity of the terminal 31 at the second antenna 22 by the second antenna coefficient. As the processing of S133, the calculation unit 132 corrects the radio wave intensity of the terminal 31 at the third antenna 23. The calculation unit 132 corrects the radio wave intensity of the terminal 31 at the third antenna 23 by multiplying the radio wave intensity of the terminal 31 at the third antenna 23 by the third antenna coefficient. The order of the processes of S131, S132, and S133 does not matter. When S133 ends, S104 in Fig. 12 starts.

[0109] In the process of S104, the position estimation unit 142 estimates the position of the terminal 31 using a three-point positioning method based on the radio wave intensity of the terminal 31. The position estimation unit 142 acquires the radio wave intensity of the terminal 31 from the calculation unit 132 or the communication unit 112. Here, the radio wave intensity of the terminal 31 includes the radio wave intensity of the terminal 31 at the first antenna 21, the radio wave intensity of the terminal 31 at the second antenna 22, and the radio wave intensity of the terminal 31 at the third antenna 23. The position estimation unit 142 transmits the estimated position of the terminal 31 to the terminal 31 via the communication unit 112.

[0110] When the position estimation unit 142 finishes the process of S104, the information processing device 2 ends the process shown in FIG.

[0111] [effect] In the information processing device 2 of the second embodiment, the location estimation unit estimates the location of the terminal based on the radio wave intensity corrected by the calculation unit. Therefore, the information processing device can appropriately estimate the location of the terminal based on the radio wave intensity that has been appropriately corrected based on the influence of external factors.

[0112] This solves the problem with the prior art that if there is an obstacle between the information processing device and each transmitter, radio waves are blocked or interfered with, resulting in position estimation being performed based on incorrect radio wave strength, resulting in a deterioration in position estimation accuracy.

[0113] Furthermore, the information processing device 2 of the second embodiment can be used for services according to the location of a terminal, for example, in a shopping mall. In this case, the information processing device 2 may transmit other information to the terminal in addition to the estimated location of the terminal. The other information may be information about nearby stores according to the location of the terminal.

[0114] Third Embodiment Next, a third embodiment of the present disclosure will be described with reference to the drawings. The information processing device 3 of the third embodiment differs from the information processing device 2 of the second embodiment in that it further includes a state determination unit 153.

[0115] Hereinafter, detailed explanation will be given with reference to the drawings. Note that, in the following, the same components as those in the first or second embodiment will be given the same reference numerals, and explanations thereof will be omitted.

[0116] [Configuration and Operation] The system of the third embodiment includes a terminal 31, a first antenna 21, a second antenna 22, a third antenna 23, and an information processing device 3.

[0117] FIG. 15 is a diagram showing an example of the configuration of an information processing device 3 according to this embodiment.

[0118] The information processing device 3 shown in FIG. 15 includes a communication unit 112, a coefficient calculation unit 122, a calculation unit 132, a position estimation unit 142, and a state determination unit 153.

[0119] The state determination unit 153 acquires the radio wave intensity between each antenna from the communication unit 112. The state determination unit 153 determines whether a predetermined condition is satisfied. The case where the predetermined condition is satisfied may be a case where the first antenna 21, the second antenna 22, or the third antenna 23 is affected by an external factor.

[0120] The external factor may be an obstacle around each of the first antenna 21, the second antenna 22, and the third antenna 23 or the terminal 31. The obstacle may be one or more movable objects. The movable object may be the terminal 31, a communication device, a person (e.g., a user, a customer, an employee, etc. of the terminal 31 or the communication device), an animal, a robot, or an obstruction such as a panel. Additionally or alternatively, the external factor may be radio wave interference around each of the antennas or the terminal 31, heavy traffic around each of the antennas or the terminal 31, or temperature or humidity around each of the antennas or the terminal 31.

[0121] A case where an external factor is influencing the radio wave strength of the first antenna 21, the second antenna 22, or the third antenna 23 is referred to as a case where the external factor is influencing the radio wave strength of the first antenna 21, the second antenna 22, or the third antenna 23. For example, this is the case where an external factor causes the radio wave strength of the first antenna 21, the second antenna 22, or the third antenna 23 to be measured as being lower or higher than the normal value.

[0122] The state determination unit 153 determines whether or not there is an influence of the external factor in two stages, including calculating a value representing the influence of the external factor and comparing the value representing the influence of the external factor with a threshold value.

[0123] The state determination unit 153 first calculates a value representing the influence of an external factor. The value representing the influence of an external factor is the difference in distance between the actual position of each antenna and the estimated position of each antenna. The distance may be Euclidean distance. The value representing the influence of an external factor is calculated for each antenna. The value representing the influence of an external factor includes a value representing the influence of an external factor on the first antenna 21, a value representing the influence of an external factor on the second antenna 22, and a value representing the influence of an external factor on the third antenna 23.

[0124] The state determination unit 153 acquires the actual position of each antenna prior to the determination. FIG. 16 is a diagram showing an example of actual position information of each antenna according to this embodiment. The state determination unit 153 may acquire the actual position of each antenna from a storage unit (not shown) or the like. The actual position of each antenna may be the position of each antenna in a first state in which no terminal 31 or obstacles are present around the first antenna 21, the second antenna 22, and the third antenna 23.

[0125] The state determination unit 153 derives an estimated position of each antenna. The estimated position of each antenna includes an estimated position of the first antenna 21, an estimated position of the second antenna 22, and an estimated position of the third antenna 23. FIG. 17 is a diagram showing an example of estimated position information of each antenna according to this embodiment. The state determination unit 153 derives the estimated position of each antenna based on radio wave intensity 702 between each antenna measured in the second state. The estimated position of the first antenna 21 is derived based on radio wave intensity 712 of the first antenna 21 at the second antenna 22, radio wave intensity 713 of the first antenna 21 at the third antenna 23, the actual position of the second antenna 22, and the actual position of the third antenna 23. The estimated position of the second antenna 22 is derived based on the radio wave intensity 721 of the second antenna 22 at the first antenna 21, the radio wave intensity 723 of the second antenna 22 at the third antenna 23, the actual position of the first antenna 21, and the actual position of the third antenna 23. The estimated position of the third antenna 23 is derived based on the radio wave intensity 731 of the third antenna 23 at the first antenna 21, the radio wave intensity 732 of the third antenna 23 at the second antenna 22, the actual position of the first antenna 21, and the actual position of the second antenna 22. The estimated position of each antenna may also be derived by the position estimation unit 142.

[0126] The state determination unit 153 compares a value representing the influence of external factors, which is the difference in distance between the actual position of each antenna and the estimated position of each antenna, with a threshold. FIG. 18 is a diagram illustrating an example of the positional relationship between the actual position of each antenna and the estimated position of each antenna according to this embodiment. The threshold may be preset for each antenna. The threshold may be, for example, 1. The state determination unit 153 may obtain the threshold from an external source at the time of determination. The state determination unit 153 determines that an external factor is present when the value representing the influence of external factors exceeds the threshold. For example, if the value representing the influence of external factors for the first antenna 21 exceeds the threshold for the first antenna 21, the state determination unit 153 determines that the first antenna 21 is subject to the influence of external factors. If the value representing the influence of external factors for the second antenna 22 exceeds the threshold for the second antenna 22, the state determination unit 153 determines that the second antenna 22 is subject to the influence of external factors. If the value representing the influence of external factors on the third antenna 23 exceeds the threshold value for the third antenna 23, the state determination unit 153 determines that the third antenna 23 is influenced by external factors.

[0127] The method of determining whether or not there is an influence of an external factor in the state determination unit 153 is not limited to the above. The state determination unit 153 may determine whether or not there is an influence of an external factor based on the number of terminals 31 or communication devices connected to each antenna. For example, the state determination unit 153 may determine that there is an influence of an external factor when the number of terminals 31 or communication devices connected to each antenna is more than a predetermined number. The state determination unit 153 may acquire this number from the communication unit 112. The predetermined number may be, for example, 10.

[0128] [Processing flow example] 19 is a flowchart illustrating an example of processing executed by the information processing device 3 according to this embodiment. The flowchart in FIG. 19 is obtained by adding the processing of S201 to the flowchart in FIG.

[0129] When the process of S101 is completed, the state determination unit 153 performs the process of S201 to determine the state. For example, the state determination unit 153 determines whether or not there is an influence of an external factor as the determination of the state. However, the determination of the state is not limited to the above. It may also be a determination of whether a predetermined condition is satisfied. The state determination unit 153 first calculates a value representing the influence of the external factor. The value representing the influence of the external factor is the difference in distance between the actual position of each antenna and the estimated position of each antenna. Next, the state determination unit 153 compares the value representing the influence of the external factor with a threshold. The state determination unit 153 determines that there is an influence of an external factor if the value representing the influence of the external factor exceeds the threshold.

[0130] If it is determined that there is an influence of an external factor on at least one of the first antenna 21, the second antenna 22, and the third antenna 23, the processes of S102 to S104 in Fig. 19 are performed in order. If it is determined that there is no influence of an external factor on any of the first antenna 21, the second antenna 22, and the third antenna 23, the processes of S102 and S103 are not performed, and the process of S104 is started.

[0131] [effect] The information processing device 3 of the third embodiment determines whether to execute coefficient calculation in the coefficient calculation unit and correction of radio wave intensity in the calculation unit based on the determination of the presence or absence of influence of external factors made by the state determination unit. Therefore, the information processing device 3 corrects radio wave intensity only when there is influence of external factors, thereby reducing processing costs.

[0132] <Fourth embodiment> Next, a fourth embodiment of the present disclosure will be described with reference to the drawings. The system 104 of the fourth embodiment differs from the system 102 of the second embodiment and the system of the third embodiment in that it further includes a fourth antenna 24 in addition to the components of the system 102 of the second embodiment or the system of the third embodiment.

[0133] Hereinafter, detailed explanation will be given with reference to the drawings. Note that, in the following, the same components as those in any one of the first, second and third embodiments will be given the same reference numerals, and explanations thereof will be omitted.

[0134] [Configuration and Operation] FIG. 20 is a diagram showing an example of the configuration of a system 104 according to this embodiment.

[0135] The system 104 shown in FIG. 20 includes a terminal 31, a first antenna 21, a second antenna 22, a third antenna 23, a fourth antenna 24, and an information processing device 4.

[0136] The fourth antenna 24 is connected to the information processing device 4 wirelessly or by wire. The fourth antenna 24 communicates with the terminal 31 or the information processing device 4. The third antenna 23 is a wireless LAN antenna. It may be an antenna of an access point, or each antenna in a distributed antenna system (DAS). The fourth antenna 24 may be an antenna of the base station or an antenna of the base station. The fourth antenna 24 transmits and receives radio waves to and from the terminal 31. The fourth antenna 24 may receive identification information of the terminal 31 from the terminal 31. The identification information may be a MAC address or an identification code unique to the terminal 31. It may be a child, or personal information of the user who owns the terminal 31.

[0137] Each of the first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24 measures the radio wave intensity of the radio wave received from the terminal 31. Each of the first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24 measures the radio wave intensity of the terminal 31. Each of the first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24 associates the measured radio wave intensity of the terminal 31 with the received identification information of the terminal 31 and transmits them to the information processing device 4. Each of the first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24 may associate the radio wave intensity of the terminal 31, the identification information of the terminal 31, and the identification information of each antenna and transmit them to the information processing device 4. For example, the fourth antenna 24 may associate the radio wave intensity of the terminal 31, the identification information of the terminal 31, and the identifier "ANT_24" of the fourth antenna 24 with each other and transmit them to the information processing device 4.

[0138] The first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24 transmit and receive radio waves to and from each other. The first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24 may transmit identification information of each antenna when transmitting radio waves to each other. The identification information may be an identifier unique to each antenna. For example, the fourth antenna 24 may transmit the identifier "ANT_24" to the first antenna 21, the second antenna 22, or the fourth antenna 24 as identification information of the fourth antenna 24.

[0139] The first antenna 21 measures the radio wave intensity of the radio waves received from the fourth antenna 24. The fourth antenna 24 measures the radio wave intensity of the radio waves received from the first antenna 21. The first antenna 21 associates the measured radio wave intensity of the fourth antenna 24 with the received identification information of the fourth antenna 24 and transmits them to the information processing device 4. The fourth antenna 24 associates the measured radio wave intensity of the first antenna 21 with the received identification information of the first antenna 21 and transmits them to the information processing device 4. The first antenna 21 may associate the radio wave intensity of the fourth antenna 24 with the identification information of the fourth antenna 24 and the identification information of the first antenna 21 and transmit them to the information processing device 4. The fourth antenna 24 may associate the radio wave intensity of the first antenna 21 with the identification information of the first antenna 21 and the identification information of the fourth antenna 24 and transmit them to the information processing device 4. For example, the first antenna 21 may associate the radio wave intensity of the fourth antenna 24, the identifier “ANT_24” of the fourth antenna 24, and the identifier “ANT_21” of the first antenna 21, and transmit them to the information processing device 4. The fourth antenna 24 may associate the radio wave intensity of the first antenna 21, the identifier “ANT_21” of the first antenna 21, and the identifier “ANT_24” of the fourth antenna 24, and transmit them to the information processing device 4.

[0140] The second antenna 22 measures the radio wave intensity of the radio waves received from the fourth antenna 24. The fourth antenna 24 measures the radio wave intensity of the radio waves received from the second antenna 22. The second antenna 22 associates the measured radio wave intensity of the fourth antenna 24 with the received identification information of the fourth antenna 24 and transmits them to the information processing device 4. The fourth antenna 24 associates the measured radio wave intensity of the second antenna 22 with the received identification information of the second antenna 22 and transmits them to the information processing device 4. The second antenna 22 may associate the radio wave intensity of the fourth antenna 24 with the identification information of the fourth antenna 24 and the identification information of the second antenna 22 and transmit them to the information processing device 4. The fourth antenna 24 may associate the radio wave intensity of the second antenna 22 with the identification information of the second antenna 22 and the identification information of the fourth antenna 24 and transmit them to the information processing device 4. For example, the second antenna 22 may associate the radio wave intensity of the fourth antenna 24, the identifier “ANT_24” of the fourth antenna 24, and the identifier “ANT_22” of the second antenna 22, and transmit them to the information processing device 4. The fourth antenna 24 may associate the radio wave intensity of the second antenna 22, the identifier “ANT_22” of the second antenna 22, and the identifier “ANT_24” of the fourth antenna 24, and transmit them to the information processing device 4.

[0141] The third antenna 23 measures the radio wave intensity of the radio waves received from the fourth antenna 24. The fourth antenna 24 measures the radio wave intensity of the radio waves received from the third antenna 23. The third antenna 23 associates the measured radio wave intensity of the fourth antenna 24 with the received identification information of the fourth antenna 24 and transmits them to the information processing device 4. The fourth antenna 24 associates the measured radio wave intensity of the third antenna 23 with the received identification information of the third antenna 23 and transmits them to the information processing device 4. The third antenna 23 may associate the radio wave intensity of the fourth antenna 24 with the identification information of the fourth antenna 24 and the identification information of the third antenna 23 and transmit them to the information processing device 4. The fourth antenna 24 may associate the radio wave intensity of the third antenna 23 with the identification information of the third antenna 23 and the identification information of the fourth antenna 24 and transmit them to the information processing device 4. For example, the third antenna 23 may associate the radio wave intensity of the fourth antenna 24, the identifier “ANT_24” of the fourth antenna 24, and the identifier “ANT_23” of the third antenna 23, and transmit them to the information processing device 4. The fourth antenna 24 may associate the radio wave intensity of the third antenna 23, the identifier “ANT_22” of the third antenna 23, and the identifier “ANT_24” of the fourth antenna 24, and transmit them to the information processing device 4.

[0142] The information processing device 4 shown in FIG. 21 includes a communication unit 114, a coefficient calculation unit 124, a calculation unit 134, a position estimation unit 144, and a state determination unit 154.

[0143] The communication unit 114 receives, from each of the first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24, the radio wave strength of the terminal 31 measured by each antenna, and identification information of the terminal 31. The communication unit 114 acquires the radio wave strength between the first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24. The radio wave strength between the antennas includes two types: a reference radio wave strength 604 between the antennas measured in a first state, and a radio wave strength 704 between the antennas measured in a second state.

[0144] The coefficient calculation unit 124 acquires the radio wave strength between each antenna from the communication unit 114. When a predetermined condition is satisfied, the coefficient calculation unit 124 calculates a coefficient representing the radio wave conditions around the antennas based on the reference radio wave strength 604 between each antenna and the radio wave strength 704 between each antenna. The case where the predetermined condition is satisfied may be when the first antenna 21, the second antenna 22, the third antenna 23, or the fourth antenna 24 is affected by an external factor.

[0145] The external factor may be an obstacle around each of the first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24 or the terminal 31. The obstacle may be one or more movable objects. The movable object may be the terminal 31, a communication device, a person (e.g., a user, a customer, an employee, etc. of the terminal 31 or the communication device), an animal, a robot, or an obstruction such as a panel. Additionally or alternatively, the external factor may be radio wave interference around each of the antennas or the terminal 31, heavy traffic around each of the antennas or the terminal 31, or the temperature or humidity around each of the antennas or the terminal 31.

[0146] A case where an external factor is influencing the radio wave strength of the first antenna 21, the second antenna 22, the third antenna 23, or the fourth antenna 24 is referred to as a case where the external factor is affecting the radio wave strength of the first antenna 21, the second antenna 22, the third antenna 23, or the fourth antenna 24. For example, this is the case where the radio wave strength of the first antenna 21, the second antenna 22, the third antenna 23, or the fourth antenna 24 is measured as being lower or higher than the normal value due to an external factor.

[0147] The coefficient calculation unit 124 calculates each antenna coefficient including the first antenna coefficient, the second antenna coefficient, the third antenna coefficient, and the fourth antenna coefficient. Here, as an example, a method for calculating each antenna coefficient when the third antenna 23 is affected by an external factor is shown.

[0148] The coefficient calculation unit 124 calculates the first antenna coefficient by dividing the reference radio wave intensity 631 received by the first antenna 21 from the third antenna 23 by the radio wave intensity 731 received by the first antenna 21 from the third antenna 23. Alternatively, the coefficient calculation unit 124 may calculate the first antenna coefficient by dividing the reference radio wave intensity 613 received by the third antenna 23 from the first antenna 21 by the radio wave intensity 713 received by the third antenna 23 from the first antenna 21.

[0149] The coefficient calculation unit 124 calculates the second antenna coefficient by dividing the reference radio wave intensity 632 received by the second antenna 22 from the third antenna 23 by the radio wave intensity 732 received by the second antenna 22 from the third antenna 23. Alternatively, the coefficient calculation unit 124 may calculate the second antenna coefficient by dividing the reference radio wave intensity 623 received by the third antenna 23 from the second antenna 22 by the radio wave intensity 723 received by the third antenna 23 from the second antenna 22.

[0150] The coefficient calculation unit 124 calculates the fourth antenna coefficient by dividing the reference radio wave intensity 634 received by the fourth antenna 24 from the third antenna 23 by the radio wave intensity 734 received by the fourth antenna 24 from the third antenna 23. Alternatively, the coefficient calculation unit 124 may calculate the fourth antenna coefficient by dividing the reference radio wave intensity 643 received by the third antenna 23 from the fourth antenna 24 by the radio wave intensity 743 received by the third antenna 23 from the fourth antenna 24.

[0151] The coefficient calculation unit 124 calculates the third antenna coefficient by averaging the first antenna coefficient, the second antenna coefficient, and the fourth antenna coefficient.

[0152] Note that the method of calculating the first antenna coefficient, second antenna coefficient, third antenna coefficient, and fourth antenna coefficient in the coefficient calculation unit 124 is not limited to the above. Furthermore, although the present embodiment describes a case where the system 104 includes the fourth antenna 24, the system 104 may also include a fifth or subsequent antenna. In this case, the coefficient calculation unit 124 may calculate the coefficient of each antenna other than the antenna affected by the external factor by dividing the reference signal strength between the antenna affected by the external factor and each antenna by the signal strength between the antenna affected by the external factor and each antenna. The antenna coefficient for an antenna affected by the external factor may be calculated by averaging the coefficients of each antenna other than the antenna affected by the external factor.

[0153] The calculation unit 134 acquires the radio wave strength of the terminal 31 at the first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24 from the communication unit 114. Furthermore, the calculation unit 134 acquires each of the antenna coefficients, i.e., the first antenna coefficient, the second antenna coefficient, the third antenna coefficient, and the fourth antenna coefficient, from the coefficient calculation unit 124. The calculation unit 134 corrects the radio wave strength of the terminal 31 based on each of the antenna coefficients. The calculation unit 134 corrects the radio wave strength of the terminal 31 at the third antenna 23 by multiplying the radio wave strength of the terminal 31 at the third antenna 23 by the fourth antenna coefficient. Note that the method of correcting the radio wave strength of the terminal 31 in the calculation unit 134 is not limited to the above.

[0154] The position estimation unit 144 acquires the radio wave intensity of the terminal 31 from the calculation unit 134. The acquired radio wave intensity of the terminal 31 in this case is the radio wave intensity corrected by the calculation unit 134. Furthermore, if the predetermined condition is not satisfied or if the state determination unit 154 determines that there is no influence of an external factor, the position estimation unit 144 acquires the radio wave intensity of the terminal 31 from the communication unit 114. The acquired radio wave intensity of the terminal 31 in this case is the radio wave intensity not corrected by the calculation unit 134. Thereafter, the position estimation unit 144 estimates the position of the terminal 31 by calculating the distance from each antenna to the terminal 31 based on the radio wave intensity of the terminal 31. Here, the radio wave intensity of the terminal 31 includes the radio wave intensity of the terminal 31 at the first antenna 21, the radio wave intensity of the terminal 31 at the second antenna 22, the radio wave intensity of the terminal 31 at the third antenna 23, and the radio wave intensity of the terminal 31 at the fourth antenna 24. The position estimation unit 144 may estimate the position of the terminal 31 using a three-point positioning method based on the radio wave strength of the terminal 31 at three of the radio wave strengths of the terminal 31 at the first antenna 21, the second antenna 22, the third antenna 23, and the fourth antenna 24. For example, the position estimation unit 144 may estimate the position of the terminal 31 using a three-point positioning method based on the radio wave strength of the terminal 31 at the first antenna 21, the second antenna 22, and the third antenna 23. Note that the combination of the three radio wave strengths is not limited to this. The position estimation unit 144 may also estimate the position of the terminal 31 using a multi-point positioning method with four or more points. For example, the position estimation unit 144 may estimate the position of the terminal 31 based on the radio wave strength of the terminal 31 at the first antenna 21, the radio wave strength of the terminal 31 at the second antenna 22, the radio wave strength of the terminal 31 at the third antenna 23, and the radio wave strength of the terminal 31 at the fourth antenna 24. If the system 104 includes a fifth or subsequent antenna, the position estimation unit 144 may further estimate the position of the terminal 31 based on the radio wave strength of the terminal 31 at the fifth or subsequent antenna.

[0155] [effect] The system 104 of the fourth embodiment includes a fourth antenna 24, and the position estimation unit 144 estimates the position of the terminal 31 by calculating the distance between the terminal 31 and each antenna from four radio wave intensities: the radio wave intensity of the terminal 31 at the first antenna 21, the radio wave intensity of the terminal 31 at the second antenna 22, the radio wave intensity of the terminal 31 at the third antenna 23, and the radio wave intensity of the terminal 31 at the fourth antenna 24.

[0156] When the position information of each antenna is known, if the distance between the terminal 31 and the first antenna 21, the distance between the terminal 31 and the second antenna 22, and the distance between the terminal 31 and the third antenna can be calculated in addition to the position of each antenna, the information processing device 4 of this embodiment can estimate the position of the terminal 31 at one point. In addition, by calculating the distance between the terminal 31 and the fourth antenna 24, the information processing device 4 can correct the estimated position of the terminal 31.

[0157] From the above, the information processing device 4 of this embodiment can improve the accuracy of position estimation compared to the information processing device 3 of the third embodiment, which estimates the position of the terminal 31 by calculating the distance between the terminal 31 and each antenna from three radio wave intensities: the radio wave intensity of the terminal 31 at the first antenna 21, the radio wave intensity of the terminal 31 at the second antenna 22, and the radio wave intensity of the terminal 31 at the third antenna 23.

[0158] Fifth Embodiment Next, a fifth embodiment of the present disclosure will be described. As shown in Fig. 22, a system 105 of the fifth embodiment includes a terminal 33, a first antenna 21, a second antenna 22, a third antenna 23, and an information processing device 5. The system 105 of the fifth embodiment differs from the second embodiment in that the position estimation unit 142 in the information processing device 2 of the second embodiment is included in the terminal 33. That is, as shown in Fig. 23, the information processing device 5 of the fifth embodiment includes a communication unit 115, a coefficient calculation unit 122, and a calculation unit 132. As shown in Fig. 24, the terminal 33 of the fifth embodiment includes a communication unit 315 and a position estimation unit 345.

[0159] The following provides a detailed description. Note that, in the following, the same components as those in any one of the first, second, third, and fourth embodiments are denoted by the same reference numerals, and the description thereof will be omitted.

[0160] [Configuration and Operation] The terminal 33 includes a communication unit 315 and a position estimation unit 345 .

[0161] The communication unit 315 performs the following operations in addition to the operations of the terminal 31 in the second embodiment. The communication unit 315 acquires the radio wave strength of the terminal 33 at each antenna and the identification information of each antenna from another device. The other device may be, for example, the information processing device 5 or each of the first antenna 21, the second antenna 22, and the third antenna 23. The radio wave strength of the terminal 33 at each antenna is the radio wave strength of the terminal 33 at the first antenna 21, the radio wave strength of the terminal 33 at the second antenna 22, and the radio wave strength of the terminal 33 at the third antenna 23. The identification information of each antenna may be an identifier unique to each antenna. The communication unit 315 may receive, from each antenna, an association between the radio wave strength of the terminal 33 at each antenna and the identification information of each antenna. The communication unit 315 acquires location information of each antenna based on the identification information. The communication unit 315 may receive the location information of each antenna directly from each antenna.

[0162] The position estimation unit 345 estimates its own position based on the radio wave intensity of the terminal 33 at each antenna and the position information of each antenna.

[0163] The position estimation unit 345 acquires the radio wave intensity of the terminal 33 at each antenna, which the communication unit 315 acquires from the information processing device 5. The radio wave intensity of the terminal 33 acquired in this case is radio wave intensity corrected by the calculation unit 132 of the information processing device 5 if a predetermined condition is satisfied. The position estimation unit 345 may also acquire the radio wave intensity of the terminal 33 at each antenna, which the communication unit 315 acquires from each antenna. The radio wave intensity of the terminal 33 acquired in this case is radio wave intensity not corrected by the calculation unit 132 of the information processing device 5. The position estimation unit 345 calculates the distance between each antenna and the terminal 33 based on the radio wave intensity of the terminal 33. Furthermore, the position estimation unit 345 estimates the position of the terminal 33 based on the distance between each antenna and the terminal 33 and the position information of each antenna. The position estimation unit 345 may estimate the position of the terminal 33 using a three-point positioning method.

[0164] Each of the first antenna 21, the second antenna 22, and the third antenna 23 in the system 105 of this embodiment associates the measured radio wave strength of the terminal 33 with the identification information of its own antenna and transmits the same to the terminal 33. For example, the first antenna 21 may associate the radio wave strength of the terminal 33 at the first antenna 21 with the identifier "ANT_21" of the first antenna 21 and transmit the same to the terminal 33. The second antenna 22 may associate the radio wave strength of the terminal 33 at the second antenna 22 with the identifier "ANT_22" of the second antenna 22 and transmit the same to the terminal 33. The third antenna 23 may associate the radio wave strength of the terminal 33 at the third antenna 23 with the identifier "ANT_23" of the third antenna 23 and transmit the same to the terminal 33. Each antenna may transmit its location information to the terminal 33 in addition to or instead of the identification information.

[0165] The communication unit 115 of the information processing device 5 in this embodiment performs the following operations in addition to the operations of the communication unit 112 of the information processing device 2 in the second embodiment. The communication unit 115 transmits to the terminal 33 the radio wave intensity of the terminal 33 at each antenna, which has been corrected by the calculation unit 132, associated with the identification information of each antenna. The communication unit 115 may further transmit position information of each antenna to the terminal 33.

[0166] [effect] The terminal 33 of the fifth embodiment estimates its own position using the position estimation unit 345 based on the radio wave intensity of the terminal 33 corrected by the calculation unit 132 of the information processing device 5. Therefore, the terminal 33 of this embodiment can appropriately estimate its own position based on the radio wave intensity that has been appropriately corrected based on the influence of external factors. Furthermore, the information processing device 5 of this embodiment can reduce processing costs compared to the information processing device 2 of the second embodiment that includes the position estimation unit 142.

[0167] Although the present disclosure has been described above with reference to the embodiments and specific examples, the present disclosure is not limited to the above-described embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure.

[0168] For example, the steps in the processes described herein do not necessarily have to be performed in the chronological order depicted in the flowcharts. For example, the steps in the processes may be performed in an order different from that depicted in the figures, or may be performed in parallel. Also, some of the steps in the processes may be eliminated, and additional steps may be added to the processes.

[0169] Also, a method including the processing of the components of the information device described in this disclosure (for example, at least one of the communication unit, coefficient calculation unit, calculation unit, position estimation unit, and state determination unit) may be provided, and a program for causing a processor to execute the processing of the above components may be provided. Also, a non-transitory computer-readable medium on which the program is recorded may be provided. Naturally, such devices, modules, methods, programs, and non-transitory computer-readable mediums are also included in the present disclosure.

[0170] Some or all of the above embodiments can be described as, but are not limited to, the following supplementary notes. (Appendix 1) a communication unit that acquires radio wave strength of a terminal at a first antenna and a second antenna that transmit and receive radio waves to the terminal, and radio wave strength between the first antenna and the second antenna; a coefficient calculation unit that calculates a coefficient representing a radio wave condition around the antenna based on the radio wave intensity between the first antenna and the second antenna when a predetermined condition is satisfied; a calculation unit that corrects the radio wave intensity of the terminal using a coefficient that represents the radio wave conditions around the antenna; An information processing device comprising: (Appendix 2) The case where the predetermined condition is satisfied is a case where at least one of the first antenna and the second antenna is affected by an external factor. 2. The information processing device according to claim 1. (Appendix 3) The external factors include at least one of obstacles around the first antenna and the second antenna or the terminal, radio wave interference around the antenna or the terminal, traffic congestion around the antenna or the terminal, and temperature or humidity around the antenna or the terminal. 3. The information processing device according to claim 2. (Appendix 4) The obstacles around each antenna or the terminal include one or more movable objects. 4. The information processing device according to claim 3. (Appendix 5) the one or more movable objects include one or more obstructions; 5. The information processing device according to claim 4. (Appendix 6) A coefficient representing a radio wave condition around the antenna is calculated for each of the first antenna and the second antenna. 2. The information processing device according to claim 1. (Appendix 7) The coefficient representing the radio wave condition around the antenna is calculated based on the reference radio wave strength between the antennas measured in a first state and the radio wave strength between the antennas measured in a second state. 7. The information processing device according to claim 6. (Appendix 8) The first state is a state in which there is no obstacle, radio wave interference, heavy traffic, or change in temperature or humidity around each of the antennas. 8. The information processing device according to claim 7. (Appendix 9) The second state is a state in which at least one of an obstacle, radio wave interference, heavy traffic, and a change in temperature or humidity exists around each of the antennas. 9. The information processing device according to claim 7 or 8. (Appendix 10) The coefficient representing the radio wave conditions around the antenna is calculated by dividing the reference radio wave strength between the antennas measured in the first state by the radio wave strength between the antennas measured in the second state. 8. The information processing device according to claim 7. (Appendix 11) The coefficient representing the radio wave conditions around the antenna is calculated by taking the average value of the reference radio wave strength between the antennas measured in the first state divided by the radio wave strength between the antennas measured in the second state. 8. The information processing device according to claim 7. (Appendix 12) The coefficient representing the radio wave conditions around the antenna is calculated based on the round trip time (RTT) between the antennas. 7. The information processing device according to claim 6. (Appendix 13) The coefficient representing the radio wave condition around the antenna is calculated based on a reference RTT between the antennas measured in a first state and an RTT between the antennas measured in a second state. 13. The information processing device according to claim 12. (Appendix 14) The reference RTT is measured based on the transmission and reception of radio waves between the antennas in the first state. The RTT is 14. The information processing device according to claim 13. (Appendix 15) The coefficient representing the radio wave condition around the antenna is calculated based on a coefficient representing a past radio wave condition around the antenna. 2. The information processing device according to claim 1. (Appendix 16) The coefficient representing the radio wave condition around the antenna is calculated based on the difference between the reference radio wave strength between the antennas measured in the first state and the radio wave strength between the antennas measured in the second state. 8. The information processing device according to claim 7. (Appendix 17) The coefficient representing the radio wave condition around the antenna is calculated based on a predetermined table showing the correspondence between the difference between the reference radio wave strength between the antennas measured in the first state and the radio wave strength between the antennas measured in the second state and the coefficient representing the radio wave condition around the antenna. 8. The information processing device according to claim 7. (Appendix 18) the calculation unit corrects the radio wave intensity of the terminal when the coefficient calculation unit calculates the coefficient representing the radio wave conditions around the antenna. 2. The information processing device according to claim 1. (Appendix 19) the calculation unit corrects the radio wave strength of the terminal by multiplying the radio wave strength of the terminal by a coefficient representing the radio wave conditions around the antenna; 2. The information processing device according to claim 1. (Appendix 20) The calculation unit multiplies the radio wave intensity of the terminal at each of the antennas by a coefficient representing a radio wave condition around the antenna, 7. The information processing device according to claim 6. (Appendix 21) the calculation unit corrects the radio wave strength of the terminal by multiplying or adding a correction value selected based on a coefficient representing the radio wave conditions around the antenna to the radio wave strength of the terminal; 2. The information processing device according to claim 1. (Appendix 22) The correction value is selected based on a correspondence table between a first antenna coefficient, which is a coefficient representing a radio wave condition around the first antenna, and a second antenna coefficient, which is a coefficient representing a radio wave condition around the second antenna, and the correction value. 22. The information processing device according to claim 21. (Appendix 23) The communication unit further acquires radio wave intensity of the terminal at a third antenna that transmits and receives radio waves to the terminal, and radio wave intensity between the first antenna, the second antenna, and the third antenna. 2. The information processing device according to claim 1. (Appendix 24) Further, a position estimation unit is provided for estimating the position of the terminal based on the radio wave intensity corrected by the calculation unit. 24. The information processing device according to claim 23. (Appendix 25) the position estimation unit estimates the position of the terminal based on three-point positioning on the basis of the radio wave intensity corrected by the calculation unit; 25. The information processing device according to claim 24. (Appendix 26) The communication unit further acquires radio wave intensity of the terminal at a fourth antenna that transmits and receives radio waves to the terminal, and radio wave intensity between each of the first antenna, the second antenna, the third antenna, and the fourth antenna. 25. The information processing device according to claim 24. (Appendix 27) the position estimation unit estimates the position of the terminal based on four or more multi-point positioning based on the radio wave intensity corrected by the calculation unit; 27. The information processing device according to claim 26. (Appendix 28) the coefficient calculation unit calculates, as coefficients representing the radio wave conditions around the antennas, a second antenna coefficient obtained by dividing a reference radio wave strength received by the second antenna from the first antenna in a first state by a radio wave strength received by the second antenna from the first antenna in a second state; a third antenna coefficient obtained by dividing a reference radio wave strength received by the third antenna from the first antenna in the first state by a radio wave strength received by the third antenna from the first antenna in the second state; and a first antenna coefficient obtained by averaging the second antenna coefficient and the third antenna coefficient. 25. The information processing device according to claim 24. (Appendix 29) the calculation unit multiplies the radio wave strength of the terminal at the first antenna by the first antenna coefficient, multiplies the radio wave strength of the terminal at the second antenna by the second antenna coefficient, and multiplies the radio wave strength of the terminal at the third antenna by the third antenna coefficient; 29. The information processing device according to claim 28. (Appendix 30) Further, a state determination unit is provided for determining whether or not there is an influence of an external factor. 24. The information processing device according to claim 23. (Appendix 31) The determination is made based on the radio wave intensity between the antennas. 31. The information processing device according to claim 30. (Appendix 32) the state determination unit makes a determination based on a difference between an estimated position of each of the antennas calculated based on the radio wave intensity between the antennas measured in a second state and an actual position of each of the antennas. 32. The information processing device according to claim 31. (Appendix 33) the state determination unit determines that the first antenna is affected by the external factor when a difference between an estimated position of the first antenna calculated based on the radio wave intensity of the first antenna at the second antenna and the radio wave intensity of the first antenna at the third antenna, both measured in the second state, and an actual position of the first antenna exceeds a threshold value; 33. The information processing device according to claim 32. (Appendix 34) the state determination unit determines that there is an influence of the external factor when a difference between the estimated position of each of the antennas and the actual position of each of the antennas is 1 m or more. 33. The information processing device according to claim 32. (Appendix 35) the state determination unit determines whether or not there is an influence of the external factor based on the number of the terminals or communication devices connected to each of the antennas. 31. The information processing device according to claim 30. (Appendix 36) the coefficient calculation unit calculates a coefficient representing a radio wave condition around the antenna when it is determined that there is an influence of the external factor. 31. The information processing device according to claim 30. (Appendix 37) The antenna that transmits and receives radio waves to the terminal is a wireless local area network (LAN) access point.

[0023] Including an antenna at an access point. 37. An information processing device according to any one of appendices 1 to 36. (Appendix 38) The antenna for transmitting and receiving radio waves to the terminal includes an antenna in a distributed antenna system. 37. An information processing device according to any one of appendices 1 to 36. (Appendix 39) The antenna for transmitting and receiving radio waves to the terminal includes an antenna at a base station. 37. An information processing device according to any one of appendices 1 to 36. (Appendix 40) Acquires radio wave strength of a terminal at a first antenna and a second antenna that transmit and receive radio waves to and from the terminal, and radio wave strength between the first antenna and the second antenna; If a predetermined condition is satisfied, a coefficient representing a radio wave condition around the antenna is calculated based on the radio wave intensity between the first antenna and the second antenna; correcting the radio wave strength of the terminal using a coefficient representing the radio wave conditions around the antenna; Information processing device method. (Appendix 41) On the computer, A process of acquiring radio wave strength of a terminal at a first antenna and a second antenna that transmit and receive radio waves to the terminal, and radio wave strength between the first antenna and the second antenna; a process of calculating a coefficient representing a radio wave condition around the antenna based on the radio wave intensity between the first antenna and the second antenna when a predetermined condition is satisfied; a process of correcting the radio wave intensity of the terminal using a coefficient representing the radio wave conditions around the antenna; A computer-readable recording medium that stores a program for executing the above. [Explanation of symbols]

[0171] 1, 2, 3, 4, 5 Information processing equipment 11, 112, 114, 115, 315 Communications Department 12, 122, 124 Coefficient calculation section 13, 132, 134 calculation section 142, 144, 345 Position estimation part 153, 154 Status determination unit 21 First Antenna 22 Second Antenna 23 Third Antenna 24 Fourth Antenna 31, 33 terminals 32 Obstacles 100, 102, 104, 105 systems

Claims

1. a communication unit that acquires radio wave intensities of a first antenna and a second antenna that transmit and receive radio waves to and from a terminal, and radio wave intensities between the first antenna and the second antenna; a coefficient calculation unit that calculates a coefficient representing a radio wave condition around the antenna based on radio wave intensity between the first antenna and the second antenna when a predetermined condition is satisfied; a calculation unit that corrects the radio wave intensity of the terminal using a coefficient that represents the radio wave conditions around the antenna; An information processing device comprising:

2. The case where the predetermined condition is satisfied is a case where at least one of the first antenna and the second antenna is affected by an external factor. The information processing device according to claim 1 .

3. The external factors include at least one of obstacles around the first antenna and the second antenna or the terminal, radio wave interference around the antenna or the terminal, congestion of traffic around the antenna or the terminal, and temperature or humidity around the antenna or the terminal. The information processing device according to claim 2 .

4. The obstacles around the antennas or the terminals include one or more movable objects. The information processing device according to claim 3 .

5. the one or more movable objects include one or more obstructions; The information processing device according to claim 4 .

6. A coefficient representing a radio wave condition around the antenna is calculated for each of the first antenna and the second antenna. The information processing device according to claim 1 .

7. The coefficient representing the radio wave condition around the antenna is calculated based on the reference radio wave strength between the antennas measured in a first state and the radio wave strength between the antennas measured in a second state. The information processing device according to claim 6 .

8. The first state is a state in which there is no obstacle, radio wave interference, heavy traffic, or change in temperature or humidity around each of the antennas. The information processing device according to claim 7 .

9. acquiring radio wave intensities of a first antenna and a second antenna that transmit and receive radio waves to and from the terminal, and radio wave intensities between the first antenna and the second antenna; If a predetermined condition is satisfied, a coefficient representing a radio wave condition around the antenna is calculated based on the radio wave intensity between the first antenna and the second antenna; correcting the radio wave strength of the terminal using a coefficient representing the radio wave conditions around the antenna; Information processing device method.

10. On the computer, A process of acquiring radio wave strength of a terminal at a first antenna and a second antenna that transmit and receive radio waves to the terminal, and radio wave strength between the first antenna and the second antenna; a process of calculating a coefficient representing a radio wave condition around the antenna based on the radio wave intensity between the first antenna and the second antenna when a predetermined condition is satisfied; a process of correcting the radio wave intensity of the terminal using a coefficient representing the radio wave conditions around the antenna; A program to execute.

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