Communication apparatus, wireless device, and program

Abstract

To allow the processing load for sensing in a wireless device to be appropriately controlled while suppressing deterioration of sensing accuracy.SOLUTION: A communication device includes transmitting means for repeatedly transmitting a reference signal, receiving means for receiving feedback of sensing results of sensing from a wireless device that performs the sensing by receiving a sensing signal, determining means for determining a first cycle in which the wireless device performs the sensing based on the feedback of the sensing results, and notifying means for notifying the wireless device of the first cycle.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a sensing technology using a sensing signal. [Background technology]

[0002] Non-Patent Document 1 discloses various use cases of sensing services in mobile communication networks. In one of the configurations disclosed in Non-Patent Document 1, a base station (BS), which is a wireless communication device, 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, thereby allowing the mobile communication network to collect sensing data. Based on the collected sensing data, the mobile communication network detects the environment of the area where the base station provides service (hereinafter referred to as a service area), for example, obstacles that may obstruct the propagation of wireless signals. Note that obstacles include stationary objects such as buildings and moving objects such as vehicles. By using a signal used for communication as a sensing signal, communication and sensing can be performed efficiently.

[0003] Patent Document 1 discloses a system called ISAC (Integrated Sensing and Communication) that integrates sensing signals and communication signals. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2023 / 205961 [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TR 22.837,V19.0.0,June 2023 Summary of the Invention [Problem to be solved by the invention]

[0006] For example, as shown in FIG. 1, BS1 is configured to transmit N (N is an integer equal to or greater than 1) transmit beams T#1 to T#N, and each WD2 is configured to receive M (M is an integer equal to or greater than 1) receive beams R#1 to R#M. Then, sensing signals are repeatedly transmitted to BS1 using each of the N transmit beams. In the following description, the timing at which BS1 transmits sensing signals is referred to as "transmission timing." The transmission timing may be a repeated timing, for example, a periodic timing. By configuring in this way, each WD2 can receive the sensing signals transmitted using the N transmit beams using each of the M receive beams at each transmission timing.

[0007] In other words, if the reception result (sensing result) of a sensing signal transmitted by a transmission beam T#n (n is an integer from 1 to N) by a reception beam R#m (m is an integer from 1 to M) is expressed as sensing result #nm, each WD2 can obtain up to N×M sensing results, from sensing result #11 to sensing result #NM, at each transmission timing.

[0008] Here, in order to improve the sensing accuracy, it is effective to increase the frequency at which WD2 senses the sensing signal and the frequency at which WD2 feeds back the sensing results. However, increasing the sensing frequency increases the processing load for sensing at WD2. Furthermore, increasing the frequency of feedback of the sensing results increases the processing load for feedback at BS1 and WD2. Therefore, it is necessary to control the processing load for sensing at WD2 and the processing load for feedback at BS1 and WD2 so as to prevent an increase while suppressing a deterioration in sensing accuracy.

[0009] The present disclosure provides a technique for appropriately controlling the processing load for sensing in a wireless device while suppressing degradation of sensing accuracy. [Means for solving the problem]

[0010] According to one aspect of the present disclosure, a communication device includes a transmitting means for repeatedly transmitting a reference signal, a receiving means for receiving feedback of the sensing results from a wireless device that performs sensing by receiving the reference signal, a determining means for determining a first period in which the wireless device performs the sensing based on the feedback of the sensing results, and a notifying means for notifying the wireless device of the first period. [Effects of the Invention]

[0011] According to the present disclosure, it is possible to appropriately control the processing load for sensing in a wireless device while suppressing degradation of sensing accuracy. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a system block diagram according to some embodiments. [Figure 2] FIG. 1 is a sequence diagram according to one embodiment. [Figure 3] FIG. 10 is a diagram showing an example of a sensing result obtained by a wireless device. [Figure 4] FIG. 10 is a diagram showing an example of determination information. [Figure 5] FIG. 1 is a sequence diagram according to one embodiment. [Figure 6] FIG. 1 is a sequence diagram according to one embodiment. [Figure 7] FIG. 1 is a sequence diagram according to one embodiment. [Figure 8] FIG. 1 is a diagram showing an example of the configuration of a base station device. [Figure 9] FIG. 1 is a diagram showing an example of the configuration of a wireless device. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the scope of the invention as claimed, and not all combinations of features described in the embodiments are necessarily essential to the invention. Two or more of the features described in the embodiments may be arbitrarily combined. Furthermore, the same reference numerals are used for the same or similar components, and redundant explanations will be omitted.

[0014] First Embodiment Fig. 1 is a diagram showing the system configuration according to this embodiment. According to Fig. 1, the system includes one BS1 and two WDs2 located within the service area of ​​the BS1. The number of WDs2 located within the service area of ​​one BS1 can be any number equal to or greater than one. The BS1 is configured to transmit N (N is an integer equal to or greater than 1) transmission beams T#1 to T#N. Each WD2 is configured to receive M (M is an integer equal to or greater than 1) reception beams R#1 to R#M.

[0015] Furthermore, BS1 is configured to transmit a sensing signal using each of the N transmission beams at a transmission timing, which is a recurring timing. As the sensing signal, for example, a downlink reference signal (RS) specified in 3GPP (registered trademark) can be used. As an example, a channel state information (CSI)-RS can be used as the sensing signal. Furthermore, when there are multiple base stations, a positioning reference signal (PRS) can be used as the sensing signal. Furthermore, in this embodiment, the transmission timing is periodic, and the period is TP.

[0016] Each WD2 receives sensing signals transmitted by BS1 at sensing timing using M receiving beams. In the following description, a sensing signal transmitted using a transmitting beam T#n (n is an integer from 1 to N) and received using a receiving beam R#m (m is an integer from 1 to M) is referred to as a sensing signal #nm, and the reception result of the sensing signal #nm is referred to as a sensing result #nm. Note that each WD2 can distinguish the sensing signals #1m to #Nm received using the receiving beam R#m, for example, by their reception timing, frequency, pattern, etc.

[0017] The initial value of the sensing timing is, for example, stored in WD2 in advance. Alternatively, the initial value of the sensing timing is configured in WD2 by BS1 through higher layer signaling. The sensing timing can be defined, for example, as a multiple X (X is 1 or greater) of the transmission timing period. If X is an integer, every time BS1 transmits a sensing signal X times, WD2 receives one of the X sensing signals and performs sensing. In other words, WD2 performs sensing with a period of TP×X. In the following description, TP×X, which is the period in which WD2 performs sensing, will be referred to as the "sensing period."

[0018] Furthermore, a feedback timing is set in each WD2. For example, an initial value of the feedback timing is stored in the WD2 in advance. Alternatively, the initial value of the feedback timing is configured in the WD2 by the BS1 through higher layer signaling. The feedback timing may be defined as, for example, a multiple Y (Y is 1 or greater) of the transmission timing period. If Y is an integer, the WD2 feeds back the sensing result to the BS1 only once every Y times the BS1 transmits the sensing signal. In other words, the WD2 feeds back the sensing result to the BS1 at a period of TP×Y. In the following description, TP×Y, which is the period in which the WD2 feeds back the sensing result, is referred to as the "feedback period."

[0019] The feedback period is set to be equal to or greater than the sensing period. In other words, Y≧X. Therefore, the feedback period can be defined as a multiple Z (Z is 1 or greater) of the sensing period, rather than a multiple Y of the transmission timing. If Z is an integer, WD2 performs sensing Z times and then feeds back Z sensing results to BS1. Note that instead of feeding back Z sensing results to BS1, WD2 can also be configured to feed back a statistical value of the Z sensing results, for example, the average value of the Z sensing results, to BS1.

[0020] In this embodiment, the WD2 determines the Doppler shift amount of the sensing signal and feeds back the determined Doppler shift amount to the BS1 as one of the sensing results. When an obstacle or the WD2 is moving, the absolute value of the Doppler shift amount increases as the moving speed of the obstacle or the WD2 increases. Therefore, in order to accurately detect the distribution of obstacles within the service area of ​​the BS1, it is effective to increase the frequency of sensing for the WD2 that detects a large Doppler shift or to increase the frequency of feeding back the sensing results. In other words, in order to accurately detect the distribution of obstacles within the service area of ​​the BS1, it is effective to shorten the sensing cycle or feedback cycle for the WD2 that detects a large Doppler shift. On the other hand, for the WD2 that detects a small Doppler shift, extending the sensing cycle or feedback cycle does not significantly affect the sensing accuracy. Therefore, by extending the sensing cycle or feedback cycle for the WD2 that detects a small Doppler shift, it is possible to suppress an increase in the processing load of the WD2 and the processing load for feedback at the WD2 and the BS1.

[0021] In this embodiment, the sensing cycle of WD2 is dynamically controlled to appropriately control the sensing processing load in WD2. Meanwhile, in this embodiment, the feedback cycle is basically set to a constant initial value. Note that when the feedback cycle is defined as a multiple of the sensing cycle, the feedback cycle is also controlled by controlling the sensing cycle.

[0022] Fig. 2 is a sequence diagram according to this embodiment. Note that Fig. 2 shows a sequence between BS1 and one WD2, but the sequence in Fig. 2 is performed between BS1 and each WD2 within the service area of ​​that BS1. At S1, BS1 transmits a sensing request message requesting that WD2 perform sensing. At S2, WD2 transmits a sensing response message to BS1, which is an acknowledgment of the sensing request message. As a result, WD2 performs sensing according to the initial value of the sensing period, and at S3, feeds back the sensing result to BS1 according to the initial value of the feedback period.

[0023] In S4, BS1 determines the sensing period based on the amount of Doppler shift included in the sensing result received in S3. FIG. 3 shows an example of the sensing result received in S3. FIG. 3 is for the case where N=8 and M=8, and in the example shown in FIG. 3, BS1 receives a total of 64 sensing results, sensing results #11 to #88. Of these, sensing result #33, shown shaded, indicates the sensing result with the largest absolute value of the amount of Doppler shift. BS1 holds a first lookup table (LUT), which is determination information. FIG. 4(A) shows an example of the first LUT. The first LUT is information indicating the correspondence relationship between the absolute value of the amount of Doppler shift and the sensing period. As shown in FIG. 4(A), the larger the absolute value of the amount of Doppler shift, the shorter the sensing period. In S4, the BS1 determines, based on the first LUT, the sensing period corresponding to the amount of Doppler shift indicated by the sensing result #33 having the largest absolute value among the sensing results #11 to #88.

[0024] In S5, BS1 notifies WD2 of the sensing period determined in S4. In S6, WD2 transmits an acknowledgment of the notified sensing period to BS1. Thereafter, WD2 performs sensing according to the sensing period notified in S5. Note that, if the sensing period determined based on the first LUT is longer than the feedback period set in WD2, BS1 can determine the same period as the feedback period set in WD2 as the sensing period in S4 and notify WD2 of this period in S5. That is, the sensing period notified to WD2 can be configured to be limited to a value equal to or shorter than the feedback period set in WD2. Also, if the sensing period determined based on the first LUT is longer than the feedback period set in WD2, BS1 can also determine a feedback period equal to or longer than the sensing period determined based on the first LUT in S4. In this case, BS1 can notify WD2 of a new feedback period equal to or longer than the sensing period determined based on the first LUT in S5.

[0025] At the timing for determining the sensing period, BS1 determines the sensing period based on the latest feedback from WD2 and notifies WD2 of the determination. The determination timing may be periodic. Alternatively, the determination timing may be the timing when the sensing result fed back from WD2 satisfies a predetermined condition. The predetermined condition may be satisfied, for example, when feedback is first received from WD2 after WD2 starts sensing. Alternatively, the predetermined condition may be satisfied, for example, when the sensing result fed back from WD2 has changed significantly from the previous feedback result.

[0026] As described above, by dynamically controlling the sensing cycle of WD2 based on the sensing results, it is possible to suppress deterioration of sensing accuracy while suppressing an increase in the sensing processing load on WD2. In other words, it is possible to appropriately control the sensing processing load on WD2 while suppressing deterioration of sensing accuracy.

[0027] Second Embodiment Next, the second embodiment will be described, focusing on the differences from the first embodiment. Figure 5 is a sequence diagram according to this embodiment. Note that the same processing steps as those in the sequence of the first embodiment shown in Figure 2 are given the same step numbers, and their description will be omitted. In the first embodiment, BS1 has a first LUT, and BS1 determines the sensing period of WD2 based on the sensing result fed back from WD2. In this embodiment, WD2 stores the first LUT, and WD2 determines the sensing period based on the first LUT.

[0028] Therefore, WD2 feeds back the sensing result to the BS in S3, and then determines the sensing cycle based on the first LUT in S7. Then, WD2 notifies BS1 of the sensing cycle determined in S7 in S8. BS1 transmits an acknowledgment of the notified sensing cycle to WD2 in S9. Thereafter, WD2 performs sensing according to the sensing cycle determined in S7.

[0029] If the sensing period notified in S8 is longer than the feedback period set in WD2, BS1 can perform processing to change the feedback period of WD2 so that the feedback period of WD2 is equal to or longer than the sensing period notified in S8. Furthermore, if the sensing period determined based on the first LUT is longer than the feedback period set in WD2, WD2 can determine the same period as the feedback period set in WD2 as the sensing period and notify BS1 in S8. Furthermore, if the sensing period determined based on the first LUT is longer than the feedback period set in WD2, WD2 can also determine a feedback period equal to or longer than the sensing period determined based on the first LUT in S7. In this case, WD2 can notify BS1 in S8 of a new feedback period equal to or longer than the sensing period determined based on the first LUT, along with the sensing period determined based on the first LUT.

[0030] 5, the sensing result is transmitted to BS1 in S3, and then the sensing cycle is notified in S8, but it is also possible to configure the system so that the sensing result is transmitted in S3 and the sensing cycle determined based on the first LUT is notified to BS1. In this case, the process of S7 is executed before S3, and the process of S8 is omitted.

[0031] As described above, by dynamically controlling the sensing cycle of WD2 based on the sensing results, it is possible to suppress deterioration of sensing accuracy while suppressing an increase in the sensing processing load on WD2. In other words, it is possible to appropriately control the sensing processing load on WD2 while suppressing deterioration of sensing accuracy.

[0032] Third Embodiment Next, the third embodiment will be described, focusing on the differences from the first embodiment. In this embodiment, the feedback period of WD2 is dynamically controlled to appropriately control the processing load for feedback in BS1 and WD2. On the other hand, in this embodiment, the sensing period is basically kept constant at an initial value. Note that when the feedback period is defined as Z times the sensing period (Z is 1 or more), that is, when the sensing period is defined as (1 / Z) times the feedback period, the sensing period is also controlled by controlling the feedback period.

[0033] Fig. 6 is a sequence diagram according to this embodiment. Note that Fig. 6 shows a sequence between BS1 and one WD2, but the sequence in Fig. 6 is performed between BS1 and each WD2 within the service area of ​​that BS1. At S1, BS1 transmits a sensing request message requesting WD2 to perform sensing. At S2, WD2 transmits a sensing response message to BS1, which is an acknowledgment of the sensing request message. As a result, WD2 performs sensing according to the initial value of the sensing period, and at S3, feeds back the sensing result to BS1 according to the initial value of the feedback period.

[0034] In S10, BS1 determines the feedback period based on the sensing result received in S3. To this end, BS1 holds a second LUT, which is determination information. FIG. 4(B) shows an example of the second LUT. The second LUT is information indicating the correspondence relationship between the absolute value of the Doppler shift amount and the feedback period. As shown in FIG. 4(B), the larger the absolute value of the Doppler shift amount, the shorter the feedback period. In S10, BS1 determines, based on the second LUT, the feedback period corresponding to the maximum absolute value of the Doppler shift amount indicated by the sensing result.

[0035] In S11, BS1 notifies WD2 of the feedback period determined in S10. In S12, WD2 transmits an acknowledgment of the notified feedback period to BS1. Thereafter, WD2 feeds back the sensing results in accordance with the feedback period notified in S11. Note that, if the feedback period determined based on the second LUT is shorter than the sensing period set in WD2, BS1 can determine the same period as the sensing period set in WD2 as the feedback period in S10 and notify WD2 of the same period in S11. That is, the feedback period notified to WD2 can be configured to be equal to or greater than the sensing period set in WD2. Also, if the feedback period determined based on the second LUT is shorter than the sensing period set in WD2, BS1 can also determine a sensing period equal to or less than the feedback period determined based on the second LUT in S10. In this case, BS1 can notify WD2 of a new sensing period equal to or less than the feedback period determined based on the second LUT in S11.

[0036] At the feedback period determination timing, BS1 determines the feedback period based on the latest feedback from WD2 and notifies WD2 of the determined feedback period. The determination timing may be periodic. Alternatively, the determination timing may be the timing when the sensing result fed back from WD2 satisfies a predetermined condition. The predetermined condition may be satisfied, for example, when feedback is first received from WD2 after WD2 starts sensing. Alternatively, the predetermined condition may be satisfied, for example, when the sensing result fed back from WD2 has changed significantly from the previous feedback result.

[0037] As described above, by dynamically controlling the feedback period of WD2 based on the sensing results, it is possible to suppress an increase in the processing load for feedback at BS1 and WD2 while suppressing deterioration in sensing accuracy. In other words, it is possible to appropriately control the processing load for feedback at BS1 and WD2 while suppressing deterioration in sensing accuracy.

[0038] <Fourth embodiment> Next, the fourth embodiment will be described, focusing on the differences from the third embodiment. Figure 7 is a sequence diagram according to this embodiment. Note that the same processing steps as those in the sequence of the third embodiment shown in Figure 6 are assigned the same step numbers, and their description will be omitted. In the third embodiment, BS1 has a second LUT, and BS1 determines the feedback period of WD2 based on the sensing result fed back from WD2. In this embodiment, WD2 stores the second LUT, and WD2 determines the feedback period based on the second LUT.

[0039] Therefore, after WD2 feeds back the sensing result to the BS in S3, it determines the feedback period based on the second LUT in S13. Then, WD2 notifies BS1 of the feedback period determined in S13 in S14. BS1 transmits an acknowledgment of the notified feedback period to WD2 in S15. Thereafter, WD2 performs feedback according to the feedback period determined in S13.

[0040] If the feedback period notified in S14 is shorter than the sensing period set in WD2, BS1 can perform processing to change the sensing period of WD2 so that the sensing period of WD2 is equal to or shorter than the feedback period notified in S14. Furthermore, if the feedback period determined based on the second LUT is shorter than the sensing period set in WD2, WD2 can determine the same period as the sensing period set in WD2 as the feedback period and notify BS1 in S14. Furthermore, if the feedback period determined based on the second LUT is shorter than the sensing period set in WD2, WD2 can also determine a sensing period equal to or shorter than the feedback period determined based on the second LUT in S13. In this case, WD2 can notify BS1 in S14 of a new sensing period equal to or shorter than the feedback period determined based on the second LUT, along with the feedback period determined based on the second LUT.

[0041] 7, the sensing result is transmitted to BS1 in S3, and then the feedback period is notified to BS1 in S14, but it is also possible to configure the system so that the sensing result is transmitted in S3 and the feedback period determined based on the second LUT is notified to BS1. In this case, the process of S13 is executed before S3, and S14 is omitted.

[0042] As described above, by dynamically controlling the feedback period of WD2 based on the sensing results, it is possible to suppress an increase in the processing load for feedback at BS1 and WD2 while suppressing deterioration in sensing accuracy. In other words, it is possible to appropriately control the processing load for feedback at BS1 and WD2 while suppressing deterioration in sensing accuracy.

[0043] <Other> In the first embodiment, BS1 controls the sensing cycle of WD2, and in the third embodiment, BS1 controls the feedback cycle of WD2. Here, the first and third embodiments can be combined to form a configuration in which BS1 controls both the sensing cycle and the feedback cycle based on the sensing results from WD2. The timing for determining both the sensing cycle and the feedback cycle may be the same or different. When both the sensing cycle and the feedback cycle are determined at the same timing, the determined sensing cycle and feedback cycle may be notified to WD2 in the same message.

[0044] In the second embodiment, WD2 controls the sensing period, and in the fourth embodiment, WD2 controls the feedback period. Here, the second and fourth embodiments can be combined to form a configuration in which WD2 controls both the sensing period and the feedback period based on the sensing result. The timing for determining both the sensing period and the feedback period may be the same or different. When both the sensing period and the feedback period are determined at the same timing, the determined sensing period and feedback period may be notified to BS1 in the same message.

[0045] Furthermore, in the first and third embodiments, when BS1 determines the sensing period or the feedback period, it notifies WD2 of the determined sensing period or feedback period. However, when the determined sensing period or feedback period is the same as the sensing period or feedback period set in WD2, the configuration may be such that the determined sensing period or feedback period is not notified to WD2. That is, the configuration can be such that the updated sensing period or feedback period is notified to WD2 only when the sensing period or feedback period is updated. Similarly, in the second and fourth embodiments, WD2 can be configured to notify BS1 of the updated sensing period or feedback period only when the sensing period or feedback period is updated.

[0046] Also, in the first to fourth embodiments, WD2 detects the Doppler shift of the sensing signal and feeds back the detected Doppler shift amount to BS1 as the sensing result. However, the sensing result, such as the power of the sensing signal received by WD2, the transmission beam from which the sensing signal is transmitted, and the reception beam that receives the sensing signal, may include information different from the Doppler shift amount.

[0047] <Configuration of BS1> FIG. 8 shows a configuration example of BS1. In FIG. 8, only the parts necessary for the description of the embodiment are shown, and the parts of BS1 that are not necessary for the description of the embodiment are omitted. The transmission unit 11 transmits a downlink radio signal. The reception unit 12 receives an uplink radio signal. Note that the antenna used by the transmission unit 11 to transmit the radio signal may be used only by the transmission unit 11 or may be shared with the reception unit 12. The transmission unit 11 may be configured to transmit a radio signal with one or more transmission beams. Further, the transmission unit 11 may be configured to repeatedly transmit a sensing signal with each transmission beam. The sensing signal is, for example, CSI-RS. The reception unit 12 receives the feedback of the sensing result from WD2.

[0048] The sensing processing unit 10 acquires the sensing results received by the receiving unit 12 from the WD2 and performs sensing-related processing, such as detecting obstacles within the service area of ​​the BS1. The sensing processing unit 10 includes a notification unit 101 and a determination unit 102. The determination unit 102 stores a first LUT shown in FIG. 4(A) and a second LUT shown in FIG. 4(B). At the determination timing, the determination unit 102 can determine the sensing period based on the feedback of the sensing results from the WD2 and the first LUT. Furthermore, at the determination timing, the determination unit 102 can determine the feedback period based on the feedback of the sensing results from the WD2 and the second LUT. The determination unit 102 can determine both the sensing period and the feedback period based on the feedback of the sensing results. The notification unit 101 notifies the WD2 of the sensing period and the feedback period determined by the determination unit 102.

[0049] The sensing period determined by the determination unit 102 may be equal to or shorter than the feedback period set in WD2. Furthermore, if the determination unit 102 determines a sensing period longer than the feedback period set in WD2, the determination unit 102 may determine a feedback period equal to or longer than the determined sensing period.

[0050] The feedback period determined by the determination unit 102 may be equal to or greater than the sensing period set in WD2. Furthermore, if the determination unit 102 determines a feedback period that is shorter than the sensing period set in WD2, the determination unit 102 may determine a sensing period that is equal to or less than the determined feedback period.

[0051] Furthermore, when the WD2 determines the sensing period, the sensing processing unit 10 acquires the sensing period determined by the WD2 via the receiving unit 12. When the sensing period notified by the WD2 is longer than the feedback period set in the WD2, the determining unit 102 can determine a feedback period that is equal to or longer than the notified sensing period.

[0052] Also, when WD2 determines the feedback period, the sensing processing unit 10 acquires the feedback period determined by WD2 via the receiving unit 12. When the feedback period notified from WD2 is shorter than the sensing period set in WD2, the determination unit 102 can determine a sensing period that is equal to or shorter than the notified feedback period.

[0053] <Configuration of WD2> FIG. 9 shows a configuration example of WD2. In FIG. 9, only the parts necessary for the description of the embodiment are shown, and the parts of WD2 that are not necessary for the description of the embodiment are omitted. The receiving unit 22 receives the radio signal transmitted by BS1. The transmitting unit 21 transmits a radio signal to BS1. The antenna used by the transmitting unit 21 to transmit the radio signal may be used only by the transmitting unit 21 or may be shared with the receiving unit 22. The receiving unit 22 may be configured to receive the radio signal with one or more receiving beams.

[0054] The sensing processing unit 20 performs processing related to sensing. Specifically, a sensing period and a feedback period are set in the sensing processing unit 20. The sensing processing unit 20 performs sensing by receiving a sensing signal according to the sensing period. Also, the feedback unit 201 performs feedback of the sensing result to BS1 according to the feedback period. Note that the sensing period and the feedback period can be updated by BS1.

[0055] Furthermore, when the WD2 determines and updates the sensing period or the feedback period, the update unit 202 stores the first LUT shown in FIG. 4A or the second LUT shown in FIG. 4B. The update unit 202 can determine and update the sensing period based on the sensing result and the first LUT at the determination timing (update timing). The update unit 202 can determine and update the feedback period based on the sensing result and the second LUT at the determination timing. The update unit 202 can determine and update both the sensing period and the feedback period based on the sensing result. When the update unit 202 determines or updates the sensing period or the feedback period, the feedback unit 201 notifies the WD2 of the determined or updated sensing period or feedback period.

[0056] The sensing period determined by the update unit 202 may be equal to or shorter than the feedback period set in WD2. Furthermore, if a sensing period longer than the feedback period set in WD2 is determined and updated, the update unit 202 may determine and update a feedback period equal to or longer than the determined sensing period.

[0057] The feedback period determined by the update unit 202 may be equal to or greater than the sensing period set in WD2. Furthermore, if a feedback period shorter than the sensing period set in WD2 is determined and updated, the update unit 202 may determine and update a sensing period equal to or less than the determined feedback period.

[0058] Note that the BS1 may be realized by a single device, or may be composed of multiple devices located in different locations, such as a radio unit (RU), a distributed unit (DU) and a central unit (CU), or a baseband unit (BBU) and a remote radio unit (RRU). Furthermore, although the BS (base station device) 1 has been described as transmitting a sensing signal, the device transmitting the sensing signal is not limited to a base station device in a mobile communication network, but may be any wireless communication device having the functions shown in Fig. 8, such as a wireless LAN access point device. Furthermore, the WD2 is also not limited to a wireless device in a mobile communication network, but may be any wireless device having the functions shown in Fig. 8.

[0059] The present disclosure further provides a program executable by one or more processors. The program includes instructions that, when executed by one or more processors of an apparatus, cause the apparatus to function as, for example, a wireless communication apparatus such as BS1 or a wireless device such as WD2. The present disclosure also provides a non-transitory computer-readable storage medium having the program stored thereon. The present disclosure also provides a method executed by a wireless communication apparatus such as BS1 or a wireless device such as WD2, according to the sequence shown in FIG. 2, FIG. 5, FIG. 6, or FIG. 7, or the like. The present disclosure also provides a program for causing an apparatus having one or more processors to execute these methods, and a non-transitory computer-readable storage medium having the program stored thereon.

[0060] The invention is not limited to the above-described embodiment, and various modifications and variations are possible within the scope of the gist of the invention.

[0061] This configuration makes it possible to appropriately control the processing load for sensing on wireless devices while minimizing degradation of sensing accuracy, thereby contributing to Goal 9 of the United Nations' Sustainable Development Goals (SDGs), which is to "Build resilient infrastructure, promote sustainable industrialization, and foster innovation." [Explanation of symbols]

[0062] 102: Determination unit, 101: Notification unit, 11: Transmission unit, 12: Reception unit

Claims

1. a transmitting means for repeatedly transmitting a reference signal; receiving means for receiving a feedback of a sensing result from a wireless device that performs sensing by receiving the reference signal; a determination means for determining a first period in which the wireless device performs the sensing based on the feedback of the sensing result; a notification means for notifying the wireless device of the first period; A communication device comprising:

2. the determining means determines a second period in which the wireless device performs feedback of the sensing result based on the feedback of the sensing result; The communication apparatus according to claim 1 , wherein the notification means notifies the wireless device of the second period.

3. The communication device according to claim 1 , wherein the first period determined by the determining means is equal to or shorter than a period at which the wireless device, set in the wireless device, feeds back the sensing result.

4. When the determination means determines that the first period is a period longer than a period set in the wireless device for feeding back the sensing result, the determination means determines a second period that is equal to or longer than the first period; The communication apparatus according to claim 1 , wherein the notification means notifies the wireless device of the second cycle as a cycle for feeding back the sensing result.

5. the sensing result includes a Doppler shift of the reference signal; 2. The communication device according to claim 1, wherein said determining means shortens said first period as the absolute value of said Doppler shift increases.

6. the sensing result includes a Doppler shift of the reference signal; 3. The communication device according to claim 2, wherein the determining means shortens the second period as the absolute value of the Doppler shift increases.

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

8. a sensing means for receiving a reference signal repeatedly transmitted by the communication device in accordance with a set first period and performing sensing; a feedback means for feeding back a sensing result of the sensing to the communication device; Equipped with The first period is updated by the communication unit.

9. a sensing means for receiving a reference signal repeatedly transmitted by the communication device in accordance with a set first period and performing sensing; a feedback means for feeding back a sensing result of the sensing to the communication device; an updating means for updating the first period based on the sensing result; A wireless device comprising:

10. the feedback means performs the feedback in accordance with a second period set in the wireless device; The wireless device according to claim 9 , wherein the updating means updates the second period based on the sensing result.

11. The wireless device according to claim 9 , wherein the first period is equal to or shorter than a period set in the wireless device for performing the feedback.

12. 10. The wireless device according to claim 9, wherein when the updating means updates the first period to a period longer than the period for performing the feedback set in the wireless device, the updating means determines a second period that is equal to or greater than the first period, and updates the period for performing the feedback to the second period.

13. the sensing result includes a Doppler shift of the reference signal; 10. The wireless device according to claim 9, wherein the updating means shortens the first period as the absolute value of the Doppler shift increases.

14. the sensing result includes a Doppler shift of the reference signal; 11. The wireless device according to claim 10, wherein the updating means shortens the second period as the absolute value of the Doppler shift increases.

15. A program that, when executed on one or more processors of an apparatus having one or more processors, causes the apparatus to function as a wireless device according to any one of claims 8 to 14.

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