Wireless communication system, wireless communication device, wireless communication method, and wireless communication program

Abstract

The purpose of the present disclosure is to intensively collect wireless frames that serve as groups for deriving CSI when it is necessary to derive CSI. A wireless communication system according to the present disclosure comprises a base station that transmits wireless frames, a wireless collection device, and detection equipment for which a communication area of the base station is set as a detection range. The detection equipment determines whether a target object that is one from among a user, user equipment, and a measurement object obtained using the wireless frames is detected, and transmits a detection notification to the wireless collection device when the detection is recognized. The wireless collection device starts collection of the wireless frames as the detection notification is received, and derives the CSI from the wireless frames.

Description

Wireless communication system, wireless collection device, wireless communication method, and wireless communication program

[0001] The present disclosure relates to a wireless communication system, a wireless collection device, a wireless communication method, and a program for wireless communication.

[0002] In LTE / 5G (Long Term Evolution / fifth generation mobile communication system) and wireless LAN communication, a technique for estimating channel quality or a technique for measuring the movement of an object present in a propagation path by using propagation channel information (Channel State Information, hereinafter referred to as CSI) has been disclosed (see, for example, Patent Documents 1 and 2).

[0003] Bird and animal detection system using wireless LAN radio waves, NTT Technical Journal, April 2019. OAI 5G RAN PROJECT GROUP, OpenAirInterface 5G Radio Access Network Project, 5G RAN OpenAirInterface, https: / / openairinterface.org / oai-5g-ran-project / , accessed January 9, 2024

[0004] However, in the above-described method, radio frames serving as the basis for deriving CSI are collected even when no user equipment or measurement target is present in the communication area. Even if radio frames are collected and CSI is derived when no user equipment is present, the results cannot be used for wireless communication by the user equipment. In addition, there is no point in collecting radio frames and deriving CSI when no measurement target is present. Furthermore, there are problems such as the need for large-capacity storage or memory to collect a large amount of data.

[0005] In order to solve the above-mentioned problems, the first objective of the present disclosure is to provide a wireless communication system that can centrally collect radio frames that serve as the basis for deriving CSI when it is necessary to derive CSI.

[0006] A second object of the present disclosure is to provide a wireless collection device that can intensively collect wireless frames that are used as a basis for deriving CSI when it is necessary to derive CSI.

[0007] A third object of the present disclosure is to provide a wireless communication method that can centrally collect radio frames that are used to derive CSI when it is necessary to derive CSI.

[0008] A fourth object of the present disclosure is to provide a wireless communication program that can intensively collect radio frames that serve as a basis for deriving CSI when it is necessary to derive CSI.

[0009] A first aspect of the present disclosure is preferably a wireless communication system comprising: a base station that transmits wireless frames; a wireless collection device; and a detection device whose detection range is the communication area of ​​the base station, wherein the detection device is configured to perform a determination process of determining whether a target object, which is any one of a user, a user device, and a measurement object by the wireless frames, has been detected; and a process of sending a detection notification to the wireless collection device when detection is confirmed, and wherein the wireless collection device is configured to perform a collection process of starting collection of the wireless frames upon receiving the detection notification; and a process of deriving CSI from the wireless frames.

[0010] In addition, a second aspect is preferably a wireless collection device configured to execute the following processes: upon receiving a detection notification from a detection device indicating that a target object, which is either a user, a user device, or a measurement object by a wireless frame, has been detected in the communication area of ​​the base station, start collecting the wireless frames transmitted from the base station; and derive CSI from the wireless frames.

[0011] A third aspect is preferably a wireless communication method including: a base station transmitting a wireless frame; a detection device having a detection range that includes the communication area of ​​the base station determining whether a target object, which is any one of a user, a user device, and a measurement object by the wireless frame, has been detected; if detection is confirmed, transmitting a detection notification to a wireless collection device; the wireless collection device starting collection of the wireless frame upon receiving the detection notification; and deriving CSI from the wireless frame.

[0012] In addition, a fourth aspect is preferably a wireless communication program including a program that causes a wireless collection device to execute the following processes upon receiving a detection notification from a detection device indicating that a target object, which is either a user, a user device, or a measurement object by a wireless frame, has been detected in the communication area of ​​the base station: a process of starting collection of the wireless frames transmitted from the base station; and a process of deriving CSI from the wireless frames.

[0013] In the present disclosure, a wireless collection device collects wireless frames from a base station when a user, a user equipment, or a measurement target using wireless frames is detected in the communication area, so that when CSI needs to be derived, wireless frames that are used as a basis for deriving CSI can be collected in a concentrated manner.

[0014] 1 is a configuration example of a wireless communication system according to a first embodiment of the present disclosure; FIG. 2 is a configuration example of a wireless data collection device according to the first embodiment of the present disclosure; FIG. 3 is a flowchart of processing executed by the wireless data collection device according to the first embodiment of the present disclosure; FIG. 4 is a diagram showing a hardware configuration of a wireless data collection device according to the first embodiment of the present disclosure; FIG. 5 is a configuration example of a wireless data collection device according to a modified example of the first embodiment of the present disclosure; FIG. 6 is a configuration example of a wireless communication system according to a second embodiment of the present disclosure; and FIG. 7 is a configuration example of a wireless communication system according to a third embodiment of the present disclosure.

[0015] Embodiments of the present disclosure will be described with reference to the drawings. The same or corresponding components will be designated by the same reference numerals, and repeated description may be omitted.

[0016] 1 shows an example of the configuration of a wireless communication system 100 according to a first embodiment of the present disclosure. The wireless communication system 100 includes a wireless base station (hereinafter referred to as a base station) 110, a wireless collection device 140, and a camera 130. Here, an example will be described in which the wireless collection device 140 collects wireless frames 10 from the base station 110 using a method based on the IEEE 802.11ac / ax wireless LAN standard.

[0017] The base station 110 is equipped with one or more antennas. The base station 110 uses these antennas to communicate with the user equipment 50. The user equipment 50 is a mobile terminal such as a smartphone, or a fixed terminal such as a wireless LAN router.

[0018] The base station 110 also transmits a known radio frame 10 to the wireless collection device 140 .

[0019] The communication area 20 is an area in which the base station 110 performs wireless communication.

[0020] The wireless collection device 140 receives a wireless frame 10 from the base station 110 using one or more antennas 143 (not shown). Furthermore, the wireless collection device 140 calculates a difference between the received wireless frame 10 and a known frame, and derives CSI. The CSI includes amplitude information, phase information, timestamp information, and relative value information between the antennas of the wireless collection device 140 and the antenna of the base station 110. Based on the CSI, the wireless collection device 140 can measure the measurement target 60 present within the communication area 20, or estimate the channel quality.

[0021] The wireless collection device 140 collects wireless frames 10 from the base station 110 during the time when any of a user (not shown), a user device 50, and a measurement target 60 using the wireless frames 10 is present in the communication area 20.

[0022] More specifically, the wireless collection device 140 collects wireless frames 10 from the time when the camera 130 issues a detection notification until the time when the camera 130 issues a non-detection notification.

[0023] Hereinafter, the user, the user equipment 50, and the measurement target 60 by the radio frame 10 are collectively referred to as the target object.

[0024] It should be noted that the user here is not limited to the owner of the user device 50, but also includes users who handle other user devices.

[0025] The camera 130 captures an image of the communication area 20 or a part of it as a detection range. The camera 130 analyzes the captured image and executes a process (determination process) to determine whether or not a target object has been detected. If the detection of the target object is confirmed, the camera 130 transmits a detection notification to the wireless collection device 140.

[0026] After transmitting the detection notification, the camera 130 determines whether the target object continues to be detected in the communication area 20. If the detection is no longer recognized, it means that the target object has moved out of the communication area 20. In this case, the detection device 150 transmits a non-detection notification to the wireless collection device 140.

[0027] In this manner, in this embodiment, the wireless collection device 140 collects the wireless frames 10 from the base station 110 while the target object is being detected by the camera 130 .

[0028] Although the present embodiment shows a case where there is one base station 110 and one camera 130, there may be a plurality of each.

[0029] Although the method in which the wireless collection device 140 collects wireless frames 10 from the base station 110 and derives CSI has been described above based on IEEE 802.11ac / ax, the method for collecting wireless frames 10 is not limited to this. For example, in LTE / 5G, it is possible to collect wireless frames 10 and derive CSI by using Open Air Interface (OAI), which is Open Source Software (OSS).

[0030] The camera 130 may be built into the wireless collection device 140. Alternatively, a satellite may be used instead of the camera 130, and the target object may be detected from a satellite image of the communication area 20.

[0031] 2 shows a configuration example of the wireless data collection device 140 according to the first embodiment of the present disclosure. The wireless data collection device 140 includes a CSI derivation circuit 141, a control circuit 142, an antenna 143, and a camera 130. Here, a case where the camera 130 is built into the wireless data collection device 140 will be described.

[0032] The control circuit 142 is an interface that receives detection notifications and non-detection notifications from the camera 130. Upon receiving the detection notification, the control circuit 142 instructs the CSI derivation circuit 141 to collect radio frames 10. The CSI derivation circuit 141 stops collecting radio frames 10 while there is no instruction from the control circuit 142. However, when an instruction is issued from the control circuit 142, the CSI derivation circuit 141 executes processing to start collecting radio frames 10 via the antenna 143 (collection processing). Furthermore, the CSI derivation circuit 141 derives CSI from the radio frames 10.

[0033] Thereafter, upon receiving the non-detection notification, the control circuit 142 instructs the CSI derivation circuit 141 to stop collecting the radio frames 10. The CSI derivation circuit 141 stops collecting the radio frames 10 based on the instruction.

[0034] The CSI derivation circuit 141 may further perform a process of measuring the movement, shape, etc. of the measurement target 60 present in the communication area 20 based on the derived CSI. Alternatively, the CSI derivation circuit 141 may further perform a process of estimating channel quality based on the derived CSI and feeding it back to the base station 110.

[0035] The control circuit 142 may determine preferred values ​​of transmission parameters for the base station 110 when transmitting the radio frame 10 and feed them back to the base station 110. The transmission parameters here refer to the timing, duration, interval, transmission power, beamforming angle, etc., of the transmission of the radio frame 10 by the base station 110. This enables the base station 110 to transmit the radio frame 10 more efficiently. In this case, for example, information on the number of detected targets is included in the detection notification, and the control circuit 142 stores a table that corresponds the number of detected targets to preferred values ​​of transmission parameters. The control circuit 142 reads the information on the number of detected targets from the detection notification and determines the preferred values ​​by referring to the table. The control circuit 142 then notifies the base station 110 of the determined preferred values. The base station 110 then changes the transmission parameters to the notified preferred values ​​and transmits the radio frame 10.

[0036] The functions of the control circuit 142 and the CSI derivation circuit 141 of the wireless data collection device 140 may be implemented on an external server including a cloud.

[0037] 3 is a flowchart of processing executed by the wireless data collection device 140 according to the first embodiment of the present disclosure. First, the control circuit 142 determines whether a detection notification has been received (step S01). If it is determined that the notification has not been received, the process returns to step S01. On the other hand, if it is determined that the notification has been received, the CSI derivation circuit 141 starts collecting wireless frames 10 via the antenna 143 (step S02). Furthermore, the CSI derivation circuit 141 derives CSI from the wireless frames 10 (step S03). Furthermore, the control circuit 142 determines whether a non-detection notification has been received (step S04). If it is determined that the notification has not been received, the process returns to step S04. On the other hand, if it is determined that the notification has been received, the CSI derivation circuit 141 stops collecting wireless frames 10 (step S05).

[0038] 4 is a diagram showing the hardware configuration of the wireless data collection device 140 according to the first embodiment of the present disclosure. The processing performed by the wireless data collection device 140 may be executed by a program using a computer having a CPU and memory and storing a program in the memory. Alternatively, the processing may be executed by a program using an integrated circuit such as an FPGA (Field Programmable Gate Array). The program may be provided by being recorded on a storage medium or via a network.

[0039] The wireless data collection device 140 has an input unit 40, an output unit 41, a communication unit 42, a CPU 43, a memory 44, and an HDD 45 connected via a bus 46, and functions as a computer. The wireless data collection device 140 is also configured to input and output data to and from a computer-readable storage medium 47.

[0040] The input unit 40 is, for example, a keyboard and a mouse, etc. The output unit 41 is, for example, a display device such as a display.

[0041] The communication unit 42 is, for example, a communication interface that communicates with a wireless device to be controlled.

[0042] The CPU 43 controls each component of the wireless data collection device 140 and performs predetermined processing, etc. The memory 44 and HDD 45 store data, etc.

[0043] The storage medium 47 is capable of storing wireless communication programs and the like that cause the wireless data collection device 140 to execute the functions of the wireless data collection device 140. Note that the architecture that configures the wireless data collection device 140 is not limited to the example shown in the figure.

[0044] As described above, in this embodiment, the wireless collection device 140 collects wireless frames 10 from the base station 110 while a target object is detected by the camera 130. This makes it possible to provide a wireless communication system, a wireless collection device, a wireless communication method, and a wireless communication program that can intensively collect wireless frames that serve as a basis for deriving CSI when it is necessary to derive CSI.

[0045] <Modification 1> The wireless collection device 140 may also be configured to collect wireless frames 10 at a first interval while the camera 130 is not detecting the presence of a target object, i.e., before receiving a detection notification. On the other hand, after receiving a detection notification, collection of wireless frames 10 begins at a second interval that is shorter than the first interval. This provides the same effect as in embodiment 1.

[0046] <Variation 2> Note that, when the target object is a user device 50, the camera 130 may perform a process of analyzing the movement of the user device 50 or the movement of the user, and transmit a detection notification when a specific movement is recognized. For example, when the user picks up the user device 50, the camera 130 transmits a detection notification, and the wireless collection device 140 starts collecting wireless frames 10. This makes it possible to dynamically collect wireless frames 10 in accordance with the movement of the user device 50. In this case, the camera 130 calculates the movement speed of the user or the user device 50 based on the captured image in the form of a variance value or the like. Furthermore, it is determined whether the movement speed indicated by the calculation result is a predetermined speed. If it is recognized as the predetermined speed, the camera 130 transmits a detection notification to the wireless collection device 140. Note that the movement direction may be calculated instead of the movement speed.

[0047] Note that machine learning may be used for analyzing the movements. In this case, the camera 130 is equipped with a machine learning model. In this case, the camera 130 causes the machine learning model to learn specific movements of the user device 50 or the person using it. By inputting the captured image into the trained machine learning model, it is possible to estimate whether or not a specific movement is recognized.

[0048] <Variation 3> The camera 130 may execute a process to determine whether or not the presence of a specific target object is recognized, and transmit a detection notification if the presence is recognized. This enables the provision of high-value-added services, such as collecting wireless frames 10 by the wireless collection device 140 when a specific user equipment 50 is present in the communication area 20 and providing feedback to the base station 110 to improve channel quality. In this case, the camera 130 identifies whether the detected target object corresponds to a predetermined target object from the captured image. For example, predetermined target objects can be identified by attaching an imageable label to the target object. If the target object is recognized as a predetermined target object, the camera 130 transmits a detection notification to the wireless collection device 140.

[0049] Alternatively, the second and third modifications may be combined, and the camera 130 may execute a process for determining whether a specific target object has made a specific movement, and if so, transmit a detection notification. In this case, the camera 130 determines whether a specific movement by the specific target object continues to be detected after transmitting the detection notification. If detection is no longer recognized, the camera 130 transmits a non-detection notification to the wireless collection device 140. Upon receiving the non-detection notification, the wireless collection device 140 stops collecting wireless frames 10. This allows the wireless collection device 140 to continue collecting wireless frames 10 while a specific movement by the specific target object is detected. The non-detection notification may also be transmitted when the camera 130 detects a predetermined movement by the target object.

[0050] <Variation 4> If there are multiple target objects in the communication area 20, the camera 130 may perform a process to determine whether or not a predetermined number of target objects have been detected, and if it is determined that the predetermined number has been exceeded, a detection notification may be transmitted. For example, if it is expected that a large number of user equipments 50 will gather and the line capacity will be insufficient, control may be possible such that wireless frames 10 are collected and fed back to the base station 110 to improve channel quality. Note that density may be used as a criterion instead of the number of target objects.

[0051] 5 shows a configuration example of a wireless data collection device 140 according to a modification of the first embodiment of the present disclosure. When there are multiple wireless data collection devices 140, group management of the multiple wireless data collection devices 140 becomes possible by using a database of a server 170 external to the device.

[0052] Second Embodiment In this embodiment, a detection device 150 detects a target object in the communication area 20 instead of the camera 130. The following describes the changes from the first embodiment.

[0053] FIG. 6 illustrates a configuration example of a wireless communication system 100 according to a second embodiment of the present disclosure. The wireless communication system 100 of this embodiment includes a base station 110, a wireless data collection device 140, and a detection device 150. The detection device 150 has a detection range that covers the communication area 20 or a portion thereof, and detects physical quantities such as sound, heat, light, infrared rays, and ultraviolet rays. For example, by using the sound detection device 150, the presence of a target object can be confirmed by detecting the sound emitted by the target object. The detection device 150 executes a process (determination process) to determine whether the target physical quantity has been detected in the communication area 20. If detection is confirmed, the detection device 150 transmits a detection notification to the wireless data collection device 140. Upon receiving the detection notification, the wireless data collection device 140 starts collecting wireless frames 10, as in the first embodiment.

[0054] After transmitting the detection notification, the detection device 150 determines whether the target physical quantity is still being detected. If detection is no longer confirmed, the detection device 150 transmits a non-detection notification to the wireless collection device 140. Upon receiving the non-detection notification, the wireless collection device 140 stops collecting wireless frames 10.

[0055] In this manner, in this embodiment, the wireless collection device 140 collects the wireless frames 10 from the base station 110 while the target object is being detected by the detection device 150. This provides the same effects as in the first embodiment.

[0056] Third Embodiment In this embodiment, the wireless collection device 140 collects wireless frames 10 when fluctuations are detected in items that may affect channel quality.

[0057] 7 shows an example of the configuration of a wireless communication system 100 according to a third embodiment of the present disclosure. The wireless communication system 100 of this embodiment includes a base station 110, a wireless collection device 140, and an environment acquisition device 160. The environment acquisition device 160 measures or externally acquires items such as humidity, wind pressure, weather information, and traffic volume in the communication area 20. The environment acquisition device 160 determines whether a fluctuation greater than a predetermined value is detected in the numerical value of the item, and if a fluctuation is detected, transmits a detection notification to the wireless collection device 140. Upon receiving the detection notification, the wireless collection device 140 starts collecting wireless frames 10 in the same manner as in the first embodiment.

[0058] After transmitting the detection notification, the environment acquisition device 160 determines whether the value of the item continues to fluctuate by more than a predetermined value. If no fluctuation is detected, the environment acquisition device 160 transmits a non-detection notification to the wireless collection device 140. Upon receiving the non-detection notification, the wireless collection device 140 stops collecting wireless frames 10.

[0059] In this manner, in this embodiment, when fluctuations are detected in items that may affect channel quality in the communication area 20, the wireless collection device 140 collects wireless frames 10 from the base station 110. This provides the same effects as in the first embodiment.

[0060] As described above, the present disclosure provides a wireless communication system, a wireless collection device, a wireless communication method, and a wireless communication program that can centrally collect wireless frames 10 that serve as the basis for deriving CSI when it is necessary to derive CSI.

[0061] The present disclosure is not limited to the above-described embodiments, and various modifications can be made in the implementation stage without departing from the spirit of the present disclosure. Furthermore, the embodiments and modifications may be implemented in appropriate combinations, in which case the combined effects can be obtained.

[0062] <Correspondence to Terms Used in the Claims> The camera 130 described in the first embodiment and the detection device 150 described in the second embodiment are collectively referred to as detection devices in the claims.

[0063] Aspects of the present disclosure are summarized below as appendices. (Appendix 1) A wireless communication system comprising: a base station that transmits wireless frames; a wireless collection device; and a detection device whose detection range is the communication area of ​​the base station, wherein the detection device is configured to perform a determination process of determining whether a target object, which is any one of a user, a user device, and a measurement object using the wireless frames, has been detected, and a process of transmitting a detection notification to the wireless collection device if detection is confirmed, and the wireless collection device is configured to perform a collection process of starting collection of the wireless frames upon receiving the detection notification, and a process of deriving CSI from the wireless frames. (Appendix 2) A wireless communication system according to Appendix 1, wherein the detection device is further configured to perform a process of determining whether the target object continues to be detected after transmitting the detection notification, and a process of transmitting a non-detection notification to the wireless collection device if detection is no longer confirmed, and the wireless collection device is further configured to perform a process of stopping collection of the wireless frames upon receiving the non-detection notification. (Supplementary Note 3) The wireless communication system according to Supplementary Note 1 or 2, wherein the detection device is a camera that captures images of the communication area, and wherein the determination process determines whether the target object has been detected from the captured image. (Supplementary Note 4) The wireless communication system according to Supplementary Note 1 or 2, wherein the wireless collection device is further configured to execute, based on the detection notification, a process of determining preferred values ​​of transmission parameters for when the base station transmits the wireless frame, and a process of notifying the base station of the preferred values, and the base station is configured to execute a process of changing the transmission parameters to the preferred values ​​and transmitting the wireless frame. (Supplementary Note 5) The wireless communication system according to Supplementary Note 1 or 2, wherein the wireless collection device further executes a process of collecting the wireless frames at a first interval before receiving the detection notification, and wherein the collection process starts collecting the wireless frames at a second interval shorter than the first interval.(Supplementary Note 6) A wireless collection device configured to perform the following processes: upon receiving a detection notification from a detection device indicating that a target object, which is any one of a user, a user equipment, and a measurement object by a wireless frame, has been detected in a communication area of ​​the base station, starting collection of the wireless frames transmitted from the base station; and deriving CSI from the wireless frames. (Supplementary Note 7) A wireless communication method including: a base station transmitting wireless frames; a detection device having a detection range that includes the communication area of ​​the base station determining whether a target object, which is any one of a user, a user equipment, and a measurement object by the wireless frames, has been detected; and if detection is confirmed, transmitting a detection notification to the wireless collection device; and the wireless collection device starting collection of the wireless frames upon receiving the detection notification, and deriving CSI from the wireless frames. and a wireless collection device configured to execute the following processes: (Supplementary Note 8) A wireless communication program comprising a program that causes a wireless collection device to execute, upon receiving a detection notification from a detection device indicating that a target object, which is any of a user, a user equipment, and a measurement object by wireless frames, has been detected in the communication area of ​​the base station, a process of starting collection of the wireless frames transmitted from the base station, and a process of deriving CSI from the wireless frames. (Supplementary Note 9) A wireless communication system comprising: a base station that transmits wireless frames; a wireless collection device; and a detection device whose detection range is the communication area of ​​the base station, wherein the detection device is configured to execute: a determination process of determining whether a target object, which is any of a user, a user equipment, and a measurement object by wireless frames, has been detected, a process of determining whether the target object continues to be detected when detection is confirmed, and a process of sending a non-detection notification to the wireless collection device when detection is no longer confirmed, and wherein the wireless collection device is configured to execute: a process of deriving CSI from the wireless frames, and a process of stopping collection of the wireless frames upon receiving the non-detection notification.

[0064] 10 wireless frame, 20 communication area, 40 input unit, 41 output unit, 42 communication unit, 43 CPU, 44 memory, 45 HDD, 46 bus, 47 storage medium, 50 user equipment, 60 measurement target, 100 wireless communication system, 110 base station, 130 camera, 140 wireless collection device, 141 CSI derivation circuit, 142 control circuit, 143 antenna, 150 detection device, 160 environment acquisition device, 170 server

Claims

1. A wireless communication system comprising: a base station that transmits wireless frames; a wireless collection device; and a detection device whose detection range is the communication area of ​​the base station, wherein the detection device is configured to perform a determination process of determining whether a target object, which is either a user, a user device, or a measurement object by the wireless frames, has been detected; and a process of sending a detection notification to the wireless collection device if detection is confirmed, and wherein the wireless collection device is configured to perform a collection process of starting collection of the wireless frames upon receiving the detection notification, and a process of deriving CSI from the wireless frames.

2. The wireless communication system according to claim 1, wherein the detection device is further configured to execute a process of determining whether the target object continues to be detected after transmitting the detection notification, and a process of transmitting a non-detection notification to the wireless collection device when detection is no longer recognized, and wherein the wireless collection device is further configured to execute a process of stopping collection of the wireless frames upon receiving the non-detection notification.

3. A wireless communication system according to claim 1 or 2, wherein the detection device is a camera that captures an image of the communication area, and the determination process determines whether or not the target object has been detected from the captured image.

4. The wireless communication system according to claim 1 or 2, wherein the wireless collection device is further configured to execute the following processes: determining, based on the detection notification, preferred values ​​of transmission parameters for the base station when transmitting the wireless frame; and notifying the base station of the preferred values; and the base station is configured to execute the process of changing the transmission parameters to the preferred values ​​and transmitting the wireless frame.

5. The wireless communication system according to claim 1 or 2, wherein the wireless collection device further executes a process of collecting the wireless frames at a first interval before receiving the detection notification, and in the collection process starts collecting the wireless frames at a second interval shorter than the first interval.

6. A wireless collection device configured to perform the following processes: upon receiving a detection notification from a detection device indicating that a target object, which is either a user, a user device, or a measurement object by a wireless frame, has been detected in the communication area of ​​the base station; and, in response to the detection notification, start collecting the wireless frames transmitted from the base station; and, in response to the detection notification, derive CSI from the wireless frames.

7. A wireless communication method comprising: a base station transmitting a wireless frame; a detection device having a detection range that includes the communication area of ​​the base station determining whether a target object, which is either a user, a user device, or a measurement object by the wireless frame, has been detected; if detection is confirmed, transmitting a detection notification to a wireless collection device; the wireless collection device starting collection of the wireless frame upon receiving the detection notification; and deriving CSI from the wireless frame.

8. A wireless communication program including a program that causes a wireless collection device to execute the following processes upon receiving a detection notification from a detection device indicating that a target object, which is either a user, user equipment, or a measurement object by wireless frames, has been detected in the communication area of ​​the base station: a process of starting collection of the wireless frames transmitted from the base station; and a process of deriving CSI from the wireless frames.

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