Wireless device and program for tracking moving objects

Abstract

Switch the communication device used for tracking moving objects. [Solution] The wireless device includes tracking means that tracks a moving object by receiving a sensing signal repeatedly transmitted by a communication device, acquisition means that performs acquisition processing to acquire a first reception result of a first signal transmitted by another communication device and reflected by the moving object, and notification means that notifies the communication device of the other communication device when the first reception result meets a predetermined criterion.

Description

Technical Field

[0001] The present disclosure relates to a technology for tracking a moving object using wireless signals.

Background Art

[0002] Non-Patent Document 1 discloses various use cases of sensing services in mobile communication networks. In one of the plurality of configurations disclosed in Non-Patent Document 1, a base station apparatus (BS), which is a wireless communication apparatus, transmits a signal for sensing (hereinafter referred to as a sensing signal), and a wireless device (WD) feeds back the reception result of the sensing signal to the base station apparatus, whereby the mobile communication network collects sensing data. Based on the collected sensing data, the mobile communication network can detect the environment of the area where the service is provided (hereinafter referred to as a service area), for example, obstacles that hinder the propagation of wireless signals. Note that the obstacles include stationary objects such as buildings and moving objects such as vehicles.

[0003] When an obstacle is moving, the frequency of the sensing signal received by the WD shifts due to the influence of the Doppler effect according to its moving speed and moving direction. Therefore, the mobile communication network can determine whether the obstacle is a stationary object or a moving object. By using a signal used for communication as a sensing signal, communication and sensing can be performed efficiently.

[0004] Patent Document 1 discloses a system called ISAC (Integrated Sensing And Communication) or JCAS (Joint Sensing and Communication) that integrates sensing signals and communication signals.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] [Non-Patent Document 1] 3GPP(Registered Trademark) TR 22.837, V19.0.0, June 2023 [Overview of the project] [Problems that the invention aims to solve]

[0007] When a mobile communication network wants to track a moving object, such as a vehicle, it is necessary to switch the communication equipment, such as BS, used for tracking the moving object as the object moves.

[0008] This disclosure provides a switching technology for communication devices used for tracking moving objects. [Means for solving the problem]

[0009] According to one aspect of this disclosure, the wireless device includes tracking means for tracking a moving object by receiving a sensing signal repeatedly transmitted by a communication device, acquisition means for performing acquisition processing to acquire a first reception result of a first signal transmitted by another communication device and reflected by the moving object, and notification means for notifying the communication device of the other communication device when the first reception result meets a predetermined criterion. [Effects of the Invention]

[0010] According to this disclosure, it is possible to switch the communication device used for tracking a moving object. [Brief explanation of the drawing]

[0011] [Figure 1] A system configuration diagram used to describe the embodiment. [Figure 2] Diagram illustrating the sensing process. [Figure 3] A diagram showing an example of obstacle detection. [Figure 4]Sequence diagram of the sensing process. [Figure 5] A diagram showing examples of sensing results and detection ranges. [Figure 6] A sequence diagram of the process for switching the communication device used for tracking. [Figure 7] A flowchart of the decision-making process. [Figure 8] A diagram showing an example of a wireless device configuration. [Modes for carrying out the invention]

[0012] The embodiments will be described in detail below with reference to the attached drawings. Note that the following embodiments do not limit the invention as defined in the claims, and not all combinations of features described in the embodiments are essential to the invention. Two or more features from the multiple features described in the embodiments may be arbitrarily combined. Furthermore, identical or similar configurations will be given the same reference numeral, and redundant descriptions will be omitted.

[0013] Figure 1 is a system configuration diagram used to describe the embodiment. Figure 1 shows two BS1, one WD2, and a moving obstacle (moving object) 3. The system may also include other BS1, other WD2, and other obstacles (stationary and moving objects), but these are omitted for the sake of simplicity in the diagram. In the following description, the two BS1 will be referred to as BS#1 and BS#2 to distinguish them. According to Figure 1, the moving object 3 is moving from a position closer to BS#1 than to BS#2, towards a position closer to BS#2 than to BS#1.

[0014] As shown in Figure 1, two BSs 1 are configured to be capable of transmitting signals using N transmit beams T#1 to T#N. Further, WD 2 is configured to be capable of receiving signals using M receive beams R#1 to R#M. At least one of N and M is an integer of 2 or more, and the rest is an integer of 1 or more. Alternatively, both N and M are integers of 2 or more. n in the transmit beam T#n (n is an integer from 1 to N) is the number of the transmit beam, and m in the receive beam R#m (m is an integer from 1 to M) is the number of the receive beam. Note that in Figure 1, both BS#1 and BS#2 are configured to be capable of transmitting N transmit beams, but the number of transmit beams that BS#1 and BS#2 can transmit may not be the same.

[0015] In the present embodiment, the sensing processing includes two processes, a first process and a second process. Figure 2 is an explanatory diagram of the relationship between the first process and the second process. In the following description, the sensing signal used in the first process is referred to as a first sensing signal, and the sensing signal used in the second process is referred to as a second sensing signal. First, the first process will be described.

[0016] As shown in Figure 2, the first process is repeated at a period T1. BS 1 transmits the first sensing signal on each of the N transmit beams every period T1. For the first sensing signal, for example, a downlink reference signal (RS) defined in 3GPP (registered trademark) can be used. As an example, a channel state information reference signal (CSI-RS) or a positioning reference signal (PRS) can be used as the first sensing signal. The period T1 follows the period of the RS used as the first sensing signal such as CSI-RS or PRS.

[0017] WD2 can obtain a total of N×M reception results by receiving, with each of M reception beams, the first sensing signal transmitted by BS1 with each of N transmission beams. Then, WD2 feeds back the total N×M reception results for each combination of a transmission beam and a reception beam to BS1. The reception results that WD2 feeds back to BS1 may include information indicating the combination of the transmission beam and the reception beam with which the corresponding reception result is obtained, as well as the reception power, propagation delay, and frequency Doppler shift amount based on the received first sensing signal.

[0018] BS1 and WD2 can detect the presence of an obstacle and its approximate position based on the direction of the transmission beam used for transmitting the first sensing signal, the direction of the reception beam used for receiving the first sensing signal, and the delay from when BS1 transmits the first sensing signal to when WD2 receives the first sensing signal. For example, as shown in Figure 3, when WD2 receives the first sensing signal transmitted via transmission beam T#1 with reception beam R#2, BS1 and WD2 can determine that the first sensing signal received by WD2 via reception beam R#2 is an impulse response corresponding to a reflected wave from obstacle 4, and can detect the presence of obstacle 4 shown in Figure 3 based on its propagation delay.

[0019] The position of the obstacle 4 detected by BS1 or WD2 is the relative position of the obstacle 4 to BS1 or WD2. When the obstacle 4 is moving, the frequency of the first sensing signal received by the receiving beam R#2 shifts due to the Doppler effect according to the speed and direction of movement of the obstacle 4. Therefore, BS1 and WD2 can determine the speed and direction of movement of the obstacle 4 based on the amount of Doppler shift of the first sensing signal. BS1 can perform the first processing individually with each of the multiple WD2s that can receive the first sensing signal from BS1. Based on the reception results of the first sensing signal received from each of the multiple WD2s, BS1 can detect obstacles 4 within the range to which the first sensing signal from BS1 can reach (for example, within the service area of ​​BS1). The first processing detects obstacles 4 that are located within the service area of ​​BS1, and can therefore also be referred to as "detection processing".

[0020] The second process is executed when tracking a moving obstacle 4 detected in the first process, and is also referred to as the tracking process. BS1 may start the second process if it detects a moving object to be tracked in the feedback received from multiple WD2s during the first process. At that time, BS1 selects a WD2 to be used to track the moving object. In the following description, the WD2 selected for tracking the moving object will be referred to as the "tracking WD". In the second process, BS1 transmits a second sensing signal, but notifies the tracking WD of the resources to be used to transmit the second sensing signal each time. The tracking WD feeds back the reception results of the second sensing signal to BS1. The sequence of the second sensing signal, etc., can be determined arbitrarily.

[0021] Figure 4 is a sequence diagram of the sensing process. In the sequence in Figure 4, S1 and S2 are sequences of the first process (detection process) executed every period T1, and S4 to S6 are sequences of the second process, i.e., the tracking process. Although Figure 4 shows only one WD2 selected as the tracking WD in the second process, the first process shown in S1 and S2 can be executed with each of multiple WD2s.

[0022] In S1, BS1 transmits a first sensing signal with each of its N transmit beams. As described above, in this embodiment, the first sensing signal is the downlink RS. WD2 performs sensing based on the first sensing signal transmitted by BS1 in S1. In S2, WD2 transmits N × M reception results (first reception results) of the first sensing signal to BS1. Note that BS1 may also receive first reception results from WD2 (not shown).

[0023] Figure 5(A) shows an example of the first reception result from WD2. In the following, when specific numerical examples are shown, N=M=8. That is, BS1 is configured to transmit beams T#1 to T#8, and WD2 is configured to receive beams R#1 to R#8. #nm (where n and m are integers from 1 to 8) in Figure 5(A) corresponds to the first reception result of the first sensing signal transmitted by transmit beam T#n and received by receive beam R#m. In the following, the combination of the transmit beam number and the receive beam number, i.e., the first reception result indicated by #nm, will be referred to as the first reception result#nm.

[0024] As is clear from the detection principle of obstacle 4 shown in Figure 3, the position of obstacle 4 that can be detected in the first reception result #nm is based on the direction of the transmitting beam T#n and the direction of the receiving beam R#m, that is, the combination of the transmitting beam number n and the receiving beam number m. In other words, the spatial region (detection region) in which obstacle 4 can be detected is determined by the combination of the transmitting beam number n and the receiving beam number m. Thus, the combination of the transmitting beam number and the receiving beam number identifies the detection region of obstacle 4, and below, the region in which obstacle 4 can be detected in the first reception result #nm will also be referred to as the detection region #nm.

[0025] In Figure 5(A), the shaded first reception results #32 and #67 indicate the first reception results in which an obstacle was detected. In other words, in the example in Figure 5(A), obstacle (moving object) 3 is detected in detection area #32, and obstacle 4, which is different from obstacle 3, is detected in detection area #67.

[0026] In S3, BS1 determines, based on the first reception result from each WD2, whether or not there is an obstacle to track, i.e., a moving object to track, based on predetermined criteria. For example, suppose BS1 is set to track vehicles such as cars moving at a speed faster than a predetermined speed. Because the reflection coefficient of radio waves on the surface of a car is high, if the obstacle is a car, the received power of the first sensing signal received by WD2 will be high. Also, the faster the moving speed of the obstacle, the larger the absolute value of the Doppler shift amount of the first sensing signal received by WD2. Therefore, BS1 can determine whether a vehicle is moving at a speed faster than a predetermined speed based on the received power of the first sensing signal at WD2 and the absolute value of the Doppler shift amount. If there is no moving object to track, the tracking process is not started, and therefore S4 to S6 are not executed.

[0027] On the other hand, if BS1 decides in S3 to track the moving object 3 detected in the first reception result #32 in Figure 5(A), BS1 selects a tracking WD in S3. Here, we assume that WD2 shown in Figure 4 is selected as the tracking WD. Also, if BS1 decides to track the moving object 3, it may determine the detection range. Specifically, BS1 estimates multiple detection areas in which the moving object 3 is likely to be located at the time of the next transmission of the second sensing signal, and determines the estimated multiple detection areas as the detection range. For example, BS1 estimates the speed and direction of movement of the moving object 3 based on the Doppler shift amount of the first reception result #32, and estimates one or more detection areas in which the moving object 3 is likely to be located at the time of the next transmission of the second sensing signal based on the estimated speed and direction of movement.

[0028] Figure 5(B) shows an example of the detection range determined by BS1. The shaded area in Figure 5(B) indicates the detection range. According to Figure 5(B), BS1 has defined detection areas #43 to #45, #53 to #55, and #63 to #65 as its detection range. The size of the detection range (number of detection areas) can be dynamically set based on the movement speed of the moving object 3. For example, the detection range can be made larger as the movement speed of the moving object 3 increases.

[0029] Returning to Figure 4, in S4, BS1 notifies WD2, the tracking WD, of the tracking configuration for the moving object 3. The tracking configuration includes an identifier (target ID) assigned to the moving object 3 by BS1, the radio resources used to transmit the second sensing signal in S5, and the detection range determined in S3. The target ID is used to identify the moving object 3 when tracking multiple moving objects 3, and is included in the second reception result transmitted by WD2 in S6. The radio resources are represented by a combination of time resources and frequency resources.

[0030] In S5, BS1 transmits a second sensing signal using the resources notified to WD2 in S4. The second sensing signal can be configured to be transmitted only on the transmission beam included in the detection range. When WD2 acquires the nine second reception results indicated as the detection range, in S6 it notifies BS1 of the nine second reception results. Thereafter, the same process as in S4 to S6 is repeated. Furthermore, as described above, the first process is repeated with a period T1 regardless of whether the second process is being executed or not. In Figure 2, the second process is performed only five times within the period T1 between performing the first process and performing the next first process.

[0031] In this way, by performing the second processing only when tracking a moving object 3 that is moving at a high speed, the execution of unnecessary sensing processing can be suppressed. In other words, the frequency of sensing processing can be appropriately controlled.

[0032] For example, in the configuration shown in Figure 1, let's assume that BS#1 is performing a second process to track the moving object 3 using WD2 as the tracking WD. As shown in Figure 1, if the moving object 3 is moving away from BS#1 and approaching BS#2, it is necessary to switch the BS1 performing the second process from BS#1 to BS#2 (handover) before tracking of the moving object 3 becomes impossible based on the sensing signal from BS#1. The following describes the process for switching the BS1 performing the second process from BS#1 to BS#2.

[0033] Figure 6 is a sequence diagram of the process for determining whether to switch BS1, which performs the second process, from BS#1 to BS#2. When WD2 begins to receive the first sensing signal, i.e., the downlink reference signal, which is periodically transmitted by BS#2, which is different from BS#1 that is performing the tracking process, it may start the process shown in Figure 6.

[0034] In S10, BS#2 transmits the first sensing signal, i.e., the downlink reference signal. WD2 stores the reception result of the first sensing signal transmitted by BS#2 and reflected by the moving object 3 as reception result A. Since WD2 is a tracking WD for the moving object 3, it recognizes the position of the moving object 3. Therefore, WD2 can determine the first sensing signal reflected by the moving object 3 based on the first sensing signal received with the receiving beam that has the greatest gain in the direction of the moving object 3. Reception result A may include the received power Pa at WD2 of the first sensing signal reflected by the moving object 3. Reception result A may include the period τa from when BS#2 transmits the sensing signal until WD2 receives the first sensing signal reflected by the moving object 3. Note that if WD2 does not receive the first sensing signal reflected by the moving object 3, it may be configured to treat the received power Pa as 0 and the period τa as infinity.

[0035] In S11, BS#1 transmits a sensing signal to WD2. The sensing signal transmitted by BS#1 in S11 is the first sensing signal if it is the timing of the first processing, and the second sensing signal if it is the timing of the second processing. As described above, WD2 tracks the moving object 3 based on the sensing signal from BS#1. WD2 stores the reception result of the sensing signal transmitted by BS#1 and reflected by the moving object 3 as reception result B. Reception result B may include the received power Pb of the sensing signal reflected by the moving object 3 at WD2. Reception result B may include the period τb from when BS#1 transmits the sensing signal until WD2 receives the sensing signal reflected by the moving object 3.

[0036] The processes in S10 and S11 are repeated. In the following explanation, the processes in S10 and S11 will be referred to as "acquisition processes". In one acquisition process, one reception result A and one reception result B are acquired. The acquisition process may be performed such that the difference between the acquisition timing of reception result A and the acquisition timing of reception result B in one acquisition process is within a predetermined value (predetermined time). As described above, since BS#1 executes the second process at intervals shorter than the period T1, WD2 can perform the acquisition process by receiving the sensing signal transmitted from BS#1 within a predetermined time in response to the first sensing signal transmitted by BS#2. While repeating the acquisition process, WD2 executes the determination process shown in Figure 7 in S12. The determination process is the process of determining whether or not to switch the second process to BS#2. In the flowchart in Figure 7, reception results A and B represent the received power.

[0037] In S50, WD2 initializes counter k to 0. In S51, WD2 obtains reception result A and reception result B in a single acquisition process. In S52, WD2 determines whether Pa-Pb is greater than or equal to the first threshold (Th1). The first threshold can be a value of 0 or greater. If Pa-Pb is greater than the first threshold, WD2 increments the value of counter k by 1 in S53. On the other hand, if Pa-Pb is not greater than the first threshold, WD2 does not change the value of counter k.

[0038] Next, in S54, WD2 determines whether the judgment in S52 has been performed K times, that is, whether the acquisition process has been executed K times. K is an integer greater than or equal to 2 and is set in WD2 in advance. If the number of times the acquisition process has been executed is less than K, WD2 repeats the process from S51. On the other hand, when the number of times the acquisition process has been executed reaches K, WD2 determines in S55 whether k / K is greater than or equal to the second threshold (Th2). The second threshold can be a value of 0.5 or greater. The second threshold is set in WD2 in advance. If k / K is not greater than the second threshold, WD2 determines not to switch the second process to BS#2 and repeats the process from S50. On the other hand, if k / K is greater than the second threshold, WD2 determines in S56 to switch the second process to BS#2 and terminates the process in Figure 7. In this case, in S13 of Figure 6, WD2 notifies BS#1 of the switch to BS#2 for tracking the moving object 3 in the second process. In response to this notification, BS#1 instructs BS#2 to perform the second process in S14. As a result, BS#2 starts the second process and tracks the moving object 3.

[0039] Furthermore, if reception result A and reception result B indicate a period τ, the process in S52 determines whether τb-τa is greater than the first threshold, and if it is greater than the first threshold, the counter k is incremented by 1 in S53. The first threshold can be a value of 0 or greater.

[0040] In the flowchart in Figure 7, if k / K is not greater than the second threshold in S55, WD2 was initialized to k=0 in S50. Therefore, if it is determined that the second process should not be switched to BS#2 after executing the acquisition process K times, the next decision on whether or not to switch the second process to BS#2 will be made after executing the acquisition process K more times.

[0041] Therefore, if, after executing the acquisition process K times, it is determined that the second process should not be switched to BS#2, then each time the acquisition process is executed thereafter, the system can be configured to determine whether or not to switch the second process to BS#2 based on the proportion of times in the past K determinations that Pa-Pb was greater than the first threshold. In other words, if the proportion of times in the most recent K acquisition processes that Pa-Pb was greater than the first threshold is greater than the second threshold, the system can be configured to switch the second process to BS#2.

[0042] Furthermore, WD2 can be configured to determine the result in S55 as No if the value of Pa in the most recent L judgments is 0, even if the k / K value is greater than the second threshold. L is an integer from 1 to K. For example, if K=10, the second threshold=0.6, and L=1, even if Pa-Pb is greater than the first threshold in the reception results of the first 7 acquisition processes, the configuration can be configured not to switch the second process to BS#2 if the value of Pa in the 10th acquisition process is 0.

[0043] Furthermore, although K is shown as an integer greater than or equal to 2 in the flowchart in Figure 7, K may also be 1. In this case, WD2 determines that if Pa-Pb is greater than the first threshold in the reception result of one acquisition process, it will switch the second process to BS2.

[0044] In the second process, BS1 sets the detection range based on the direction of movement of the obstacle being tracked, but it is also possible to configure it so that the detection range is not set. In this case, in the second process, BS1 transmits the second sensing signal with all of its transmitting beams, and the tracking WD attempts to receive the second sensing signal with all of its receiving beams.

[0045] As described above, when WD2 is configured as a tracking WD for the second process executed by BS#1, it determines whether it has received the first sensing signal transmitted by another BS1 and reflected by the moving object 3 being tracked. When WD2 receives the first sensing signal transmitted by another BS1 and reflected by the moving object 3 being tracked, it obtains reception result A based on the first sensing signal transmitted by the other BS1 and reception result B based on the sensing signal transmitted by BS#1, which is currently performing the second process. Then, if reception result A satisfies predetermined conditions for reception result B, WD2 determines that another BS1 is more suitable than BS#1 to perform the second process and notifies BS#1 to switch to the other BS1 for the second process. This configuration allows for effective switching of the communication device used for tracking moving objects.

[0046] <Wireless device configuration> Figure 8 shows an example configuration of the wireless device described as WD2 in the above embodiment. The transmitting unit 23 is configured to transmit signals using one or more transmitting beams. The receiving unit 24 is configured to receive signals using multiple receiving beams.

[0047] The tracking unit 20 tracks the moving object by receiving the sensing signal repeatedly transmitted by BS1.

[0048] The acquisition unit 21 performs an acquisition process to acquire the reception result A of a first signal, for example, a downlink reference signal, transmitted by another BS1 and reflected by a moving object being tracked. The acquisition unit 21 may, for example, acquire a reception result B of a sensing signal transmitted by BS1 in the acquisition process, wherein the difference between the acquisition timing of the reception result B and the acquisition timing of reception result A is within a predetermined value. Reception result A may include the received power Pa of the first signal reflected by the moving object at the wireless device, and reception result B may include the received power Pb of the sensing signal reflected by the moving object at the wireless device. Reception result A may include the period τa from when another BS1 transmits the first signal until the wireless device receives the first signal reflected by the moving object, and reception result B may include the period τb from when BS1 transmits the sensing signal until the wireless device receives the sensing signal reflected by the moving object.

[0049] The notification unit 22 notifies BS1 of another BS1 when reception result A meets a predetermined criterion. The notification unit 22 determines whether reception result A meets the predetermined criterion by comparing reception result A and reception result B, for example. The predetermined criterion may be as explained with reference to Figure 7.

[0050] The BS1 used in the description of the above embodiment may be any fixedly installed communication device that transmits and receives wireless signals to and from a wireless device. This communication device may be implemented as a single device, or it may consist of, for example, a wireless unit (RU), a distributed unit (DU), and a central unit (CU), or it may consist of a baseband unit (BBU) and a remote wireless unit (RRU). In other words, the communication device may consist of multiple devices located in different locations. The communication device may also be a DU. If the communication device is a DU, the switching target for the second processing may be another DU. This DU and the other DU may be connected to the same CU, or they may be connected to different CUs.

[0051] Furthermore, the communication device may not be a base station device in a mobile communication network, but rather a wireless communication device such as a wireless LAN access point device. Also, the WD2 described in the above embodiment is not limited to a wireless device in a mobile communication network, but can be any wireless device that accesses a wireless communication device according to any wireless communication standard.

[0052] Furthermore, this disclosure provides a program executable on one or more processors. When executed on one or more processors of the device, the program includes instructions that cause the device to function as, for example, a communication device such as BS1 or a wireless device such as WD2. For example, when executed on one or more processors of the device, the program may cause the device to function as, for example, the tracking unit 20, acquisition unit 21, and notification unit 22. Furthermore, this disclosure provides a non-temporary computer-readable storage medium storing the above program. Furthermore, this disclosure provides a method that follows the description using Figures 4, 6, and 7, etc. Furthermore, this disclosure provides a program for causing a device having one or more processors to execute the method, and a non-temporary computer-readable storage medium storing the program.

[0053] The invention is not limited to the embodiments described above, and various modifications and changes are possible within the scope of the gist of the invention.

[0054] With the above configuration, it is possible to switch the communication device used for tracking moving objects. Therefore, it becomes possible to contribute to Goal 9 of the United Nations-led Sustainable Development Goals (SDGs), "Build resilient infrastructure, promote sustainable industrialization and foster innovation." [Explanation of Symbols]

[0055] 20: Tracking unit, 21: Acquisition unit, 22: Notification unit, 23: Transmission unit, 24: Receiving unit

Claims

1. A wireless device, A tracking means that tracks a moving object by receiving sensing signals repeatedly transmitted by a communication device. Acquisition means for performing acquisition processing to acquire a first reception result of a first signal transmitted by another communication device and reflected by the moving object, When the first reception result meets a predetermined criterion, a notification means is provided to notify the communication device of the other communication device, A wireless device equipped with these features.

2. The acquisition means acquires, in the acquisition process, a second reception result of the sensing signal transmitted by the communication device, wherein the difference between the acquisition timing of the second reception result and the acquisition timing of the first reception result is within a predetermined value. The wireless device according to claim 1, wherein the notification means determines whether the first reception result satisfies the predetermined criteria by comparing the first reception result with the second reception result.

3. The first reception result includes the first received power at the wireless device of the first signal reflected by the moving object. The second reception result includes the second received power at the wireless device of the sensing signal reflected by the moving object. The wireless device according to claim 2, wherein the predetermined criterion is satisfied when the value obtained by subtracting the second received power from the first received power is greater than a first threshold of 0 or more.

4. The first reception result includes a first period from the time the other communication device transmits the first signal until the wireless device receives the first signal reflected by the moving object. The second reception result includes a second period from the time the communication device transmits the sensing signal until the wireless device receives the sensing signal reflected by the moving object. The wireless device according to claim 2, wherein the predetermined criterion is satisfied if the value obtained by subtracting the first period from the second period is greater than a first threshold of 0 or greater.

5. The acquisition means repeatedly performs the acquisition process, The first reception result includes the first received power at the wireless device of the first signal reflected by the moving object. The second reception result includes the second received power at the wireless device of the sensing signal reflected by the moving object. The wireless device according to claim 2, wherein the predetermined criteria are satisfied if, in the acquisition process a predetermined number of times in the past, the number of times the value obtained by subtracting the second received power from the first received power is greater than or equal to a first threshold of 0 is greater than the number of times the value obtained is greater than or equal to a second threshold.

6. The acquisition means repeatedly performs the acquisition process, The first reception result includes a first period from the time the other communication device transmits the first signal until the wireless device receives the first signal reflected by the moving object. The second reception result includes a second period from the time the communication device transmits the sensing signal until the wireless device receives the sensing signal reflected by the moving object. The wireless device according to claim 2, wherein the predetermined criterion is satisfied if, in the acquisition process a predetermined number of times in the past, the number of times the value obtained by subtracting the first period from the second period is greater than or equal to a first threshold of 0 is greater than the second threshold.

7. The wireless device according to claim 5 or 6, wherein even if the number of times greater than the first threshold is greater than the second threshold, the predetermined criterion is not met if the first signal reflected by the moving object is not received in the acquisition process for a fixed number of times in the immediate vicinity.

8. The wireless device according to any one of claims 1 to 6, wherein the first signal is a downstream reference signal.

9. The wireless device according to claim 8, wherein the first signal is a channel status information reference signal or a positioning reference signal.

10. The wireless device according to any one of claims 1 to 6, wherein the communication device and the other communication device are base station devices.

11. The wireless device according to any one of claims 1 to 6, wherein the communication device and the other communication device are distributed units (DUs) connected to the same central unit (CU).

12. A program that, when executed on one or more processors of a device having one or more processors, causes the device to function as a wireless device according to any one of claims 1 to 6.

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