Communication device, wireless device, and computer-readable storage medium

Abstract

This communication device comprises: a transmission means configured to repeatedly transmit a reference signal; a reception means configured to receive, from a wireless device that performs sensing by receiving the sensing signal, feedback of a sensing result pertaining to the sensing; a determination means configured to determine a first period in which the wireless device performs the sensing on the basis of the feedback of the sensing result; and a notification means configured to notify the wireless device regarding the first period.

Description

Communication apparatus, wireless device and computer-readable storage medium

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

[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 sensing signal (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 in which the mobile communication network provides service (hereinafter referred to as a service area), such as obstacles that may impede 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.

[0004] WO 2023 / 205961

[0005] 3GPP TR 22.837, V19.0.0, June 2023

[0006] For example, as shown in FIG. 1 , BS1 is configured to transmit N (N is an integer equal to or greater than 1) transmission beams T#1 to T#N, and each WD2 is configured to receive M (M is an integer equal to or greater than 1) reception beams R#1 to R#M. Then, sensing signals are repeatedly transmitted to BS1 using each of the N transmission beams. In the following description, the timing at which BS1 transmits a sensing signal is referred to as "transmission timing." The transmission timing may be a repeated timing, for example, a periodic timing. By configuring in this manner, each WD2 can receive the sensing signals transmitted using the N transmission beams using each of the M reception 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 acquire up to N x M sensing results from sensing result #11 to sensing result #NM at each transmission timing.

[0008] Here, in order to improve 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 so as to prevent an increase in the processing load for sensing at WD2 and the processing load for feedback at BS1 and WD2 while suppressing a deterioration in sensing accuracy.

[0009] According to one aspect of the present disclosure, a communication device includes a transmitting means configured to repeatedly transmit a reference signal, a receiving means configured to receive feedback of the sensing results from a wireless device that performs sensing by receiving the reference signal, a determining means configured to determine a first period in which the wireless device performs the sensing based on the feedback of the sensing results, and a notifying means configured to notify the wireless device of the first period.

[0010] Other features and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings, in which the same or similar elements are designated by the same reference numerals.

[0011] 1 is a system configuration diagram according to some embodiments; a sequence diagram according to one embodiment; a diagram showing an example of a sensing result by a wireless device; a diagram showing an example of determination information; a diagram showing an example of determination information; a sequence diagram according to one embodiment; a sequence diagram according to one embodiment; a sequence diagram according to one embodiment; a diagram showing an example of the configuration of a base station apparatus; a diagram showing an example of the configuration of a wireless device;

[0012] 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.

[0013] <First Embodiment> Fig. 1 is a system configuration diagram according to this embodiment. According to Fig. 1, the system includes one BS1 and two WDs2 located within the service area of ​​the BS1. Note that 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. Furthermore, each WD2 is configured to receive M (M is an integer equal to or greater than 1) reception beams R#1 to R#M.

[0014] Furthermore, BS1 is configured to transmit a sensing signal using each of N transmission beams at a transmission timing, which is a repetitive timing. For example, a downlink reference signal (RS) defined by 3GPP (registered trademark) can be used as the sensing signal. As an example, a channel state information (CSI)-RS can be used as the sensing signal. Furthermore, in the case where multiple base stations exist, 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.

[0015] Each WD2 receives the sensing signal transmitted by BS1 at the 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.

[0016] 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, WD2 receives one of the X sensing signals and performs sensing each time BS1 transmits a sensing signal X times. In other words, WD2 performs sensing using 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."

[0017] Furthermore, feedback timing is set for each WD2. The initial value of the feedback timing is, for example, stored in WD2 in advance. Alternatively, the initial value of the feedback timing is configured in WD2 by BS1 through higher layer signaling. The feedback timing can be defined, for example, as a multiple Y (Y is 1 or greater) of the transmission timing period. If Y is an integer, WD2 feeds back the sensing result to BS1 only once every Y times BS1 transmits a sensing signal. In other words, WD2 feeds back the sensing result to BS1 at a period of TP×Y. In the following description, TP×Y, which is the period in which WD2 feeds back the sensing result, is referred to as the "feedback period."

[0018] 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.

[0019] In this embodiment, WD2 determines the Doppler shift amount of the sensing signal and feeds back the determined Doppler shift amount to BS1 as one of the sensing results. When an obstacle or WD2 is moving, the faster the moving speed of these obstacles or WD2 is, the larger the absolute value of the Doppler shift amount becomes. Therefore, in order to accurately detect the distribution of obstacles within the service area of ​​BS1, it is effective to increase the frequency of sensing for 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 ​​BS1, it is effective to shorten the sensing period or feedback period for WD2 that detects a large Doppler shift. On the other hand, for WD2 that detects a small Doppler shift, extending the sensing period or feedback period does not significantly affect the sensing accuracy. Therefore, for WD2, which detects a small amount of Doppler shift, the sensing period and feedback period can be lengthened to prevent an increase in the processing load of WD2 and the processing load for feedback at WD2 and BS1.

[0020] 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.

[0021] 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. In S1, BS1 transmits a sensing request message requesting WD2 to perform sensing. In 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 in S3, feeds back the sensing result to BS1 according to the initial value of the feedback period.

[0022] In S4, BS1 determines the sensing period based on the Doppler shift amount included in the sensing result received in S3. FIG. 3 shows an example of the sensing results received in S3. FIG. 3 shows the case where N = 8 and M = 8. 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 Doppler shift amount. BS1 holds a first lookup table (LUT), which serves as determination information. FIG. 4A shows an example of the first LUT. The first LUT is information indicating the correspondence between the absolute value of the Doppler shift amount and the sensing period. As shown in FIG. 4A, the larger the absolute value of the Doppler shift amount, 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.

[0023] 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 the same period in S5. In other words, a configuration can be adopted in which the sensing period notified to WD2 is limited to be equal to or shorter than the feedback period set in WD2. Furthermore, 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, in S5, BS1 can notify WD2 of the sensing period determined based on the first LUT, as well as a new feedback period that is equal to or greater than the sensing period.

[0024] 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.

[0025] As described above, by dynamically controlling the sensing cycle of WD 2 based on the sensing results, it is possible to suppress deterioration of sensing accuracy while suppressing an increase in the sensing processing load on WD 2. In other words, it is possible to appropriately control the sensing processing load on WD 2 while suppressing deterioration of sensing accuracy.

[0026] Second Embodiment Next, the second embodiment will be described, focusing on the differences from the first embodiment. Fig. 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 Fig. 2 are assigned 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 results fed back from WD2. In this embodiment, WD2 stores the first LUT, and WD2 determines the sensing period based on the first LUT.

[0027] 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 in accordance with the sensing cycle determined in S7.

[0028] 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 of this period 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 of a new feedback period equal to or longer than the sensing period determined based on the first LUT in S8.

[0029] 5, the sensing result is transmitted to BS 1 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 BS 1. In this case, the process of S7 is executed before S3, and the process of S8 is omitted.

[0030] As described above, by dynamically controlling the sensing cycle of WD 2 based on the sensing results, it is possible to suppress deterioration of sensing accuracy while suppressing an increase in the sensing processing load on WD 2. In other words, it is possible to appropriately control the sensing processing load on WD 2 while suppressing deterioration of sensing accuracy.

[0031] 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 at 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.

[0032] 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. In S1, BS1 transmits a sensing request message to WD2 requesting that sensing be performed. In 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 in S3, feeds back the sensing result to BS1 according to the initial value of the feedback period.

[0033] 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. 4B 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. 4B, 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.

[0034] 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 performs feedback of 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 in S10 the same period as the sensing period set in WD2 as the feedback period and notify WD2 of this period in S11. In other words, the feedback period notified to WD2 can be configured to be limited to be equal to or longer than the sensing period set in WD2. Furthermore, if the feedback period determined based on the second LUT is shorter than the sensing period set in WD2, BS1 can also determine in S10 a sensing period shorter than the feedback period determined based on the second LUT. In this case, in S11, BS1 can notify WD2 of the feedback period determined based on the second LUT, as well as a new sensing period that is equal to or shorter than the feedback period.

[0035] 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.

[0036] 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 of sensing accuracy. In other words, it is possible to appropriately control the processing load for feedback at BS1 and WD2 while suppressing deterioration of sensing accuracy.

[0037] Fourth Embodiment Next, the fourth embodiment will be described, focusing on the differences from the third embodiment. Fig. 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 Fig. 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 results fed back from WD2. In this embodiment, WD2 stores the second LUT, and WD2 determines the feedback period based on the second LUT.

[0038] 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.

[0039] 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, along with the feedback period determined based on the second LUT.

[0040] 7, after transmitting the sensing result to BS1 in S3, 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.

[0041] 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 of sensing accuracy. In other words, it is possible to appropriately control the processing load for feedback at BS1 and WD2 while suppressing deterioration of sensing accuracy.

[0042] <Others> In the first embodiment, BS1 controls the sensing period of WD2, and in the third embodiment, BS1 controls the feedback period of WD2. Here, the first and third embodiments can be combined to form a configuration in which BS1 controls both the sensing period and the feedback period based on the sensing results from WD2. The determination timing for determining both the sensing period and the feedback period may be the same or different. If both the sensing period and the feedback period are determined at the same determination timing, the determined sensing period and feedback period may be notified to WD2 in the same message.

[0043] 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 results. The determination timings 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 determination timing, the determined sensing period and feedback period may be notified to BS1 in the same message.

[0044] Furthermore, in the first and third embodiments, when BS1 determines the sensing period or feedback period, it notifies WD2 of the determined sensing period or feedback period. However, if the determined sensing period or feedback period is the same as the sensing period or feedback period set in WD2, it may be configured not to notify WD2 of the determined sensing period or feedback period. In other words, it may be configured to notify WD2 of the updated sensing period or feedback period only when the sensing period or feedback period is updated. Similarly, in the second and fourth embodiments, WD2 may be configured to notify BS1 of the updated sensing period or feedback period only when the sensing period or feedback period is updated.

[0045] In the first to fourth embodiments, WD2 detects the Doppler shift of the sensing signal and feeds back the detected Doppler shift amount as the sensing result to BS 1. However, the sensing result may include information other than the Doppler shift amount, such as the power of the sensing signal received by WD2, the transmission beam through which the sensing signal was transmitted, and the reception beam through which the sensing signal was received.

[0046] <Configuration of BS1> FIG. 8 shows an example configuration of BS1. Note that FIG. 8 shows only parts necessary for explaining the embodiment, and parts of BS1 that are not necessary for explaining the embodiment are omitted. The transmitter 11 transmits downlink radio signals. The receiver 12 receives uplink radio signals. Note that the antenna used by the transmitter 11 to transmit the radio signals may be used exclusively by the transmitter 11 or may be shared with the receiver 12. The transmitter 11 may be configured to transmit radio signals using one or more transmission beams. Furthermore, the transmitter 11 may be configured to repeatedly transmit a sensing signal using each transmission beam. The sensing signal is, for example, CSI-RS. The receiver 12 receives feedback of the sensing result from WD2.

[0047] The sensing processing unit 10 acquires the sensing results received by the receiving unit 12 from WD2 and performs sensing-related processing, such as detecting obstacles within the service area of ​​BS1. The sensing processing unit 10 includes a notification unit 101 and a determination unit 102. The determination unit 102 stores the first LUT shown in FIG. 4A and the second LUT shown in FIG. 4B. At the determination timing, the determination unit 102 can determine the sensing period based on the feedback of the sensing results from 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 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 WD2 of the sensing period and the feedback period determined by the determination unit 102.

[0048] 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.

[0049] 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 shorter than the sensing period set in WD2, the determination unit 102 may determine a sensing period equal to or less than the determined feedback period.

[0050] Furthermore, when WD2 determines the sensing period, the sensing processing unit 10 acquires the sensing period determined by WD2 via the receiving unit 12. When the sensing period notified by WD2 is longer than the feedback period set in WD2, the determining unit 102 can determine a feedback period that is equal to or longer than the notified sensing period.

[0051] Furthermore, 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 by WD2 is shorter than the sensing period set in WD2, the determining unit 102 can determine a sensing period that is shorter than the notified feedback period.

[0052] <Configuration of WD2> Fig. 9 shows an example of the configuration of WD2. Note that Fig. 9 shows only the parts necessary for explaining the embodiment, and omits parts of WD2 that are not necessary for explaining the embodiment. The receiver 22 receives radio signals transmitted by BS1. The transmitter 21 transmits radio signals to BS1. Note that the antenna used by the transmitter 21 to transmit the radio signals may be one used exclusively by the transmitter 21, or may be one shared with the receiver 22. The receiver 22 may be configured to receive radio signals using one or more reception beams.

[0053] 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 receives a sensing signal in accordance with the sensing period and performs sensing. Furthermore, the feedback unit 201 feeds back the sensing result to the BS1 in accordance with the feedback period. Note that the sensing period and the feedback period can be updated by the BS1.

[0054] Furthermore, when 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 also 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 WD2 of the determined or updated sensing period or feedback period.

[0055] 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.

[0056] 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.

[0057] Note that 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), a central unit (CU), or a baseband unit (BBU) and a remote radio unit (RRU). Furthermore, while 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, 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.

[0058] 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 methods executed by a wireless communication apparatus such as BS1 or a wireless device such as WD2, for example, according to the sequences shown in Figures 2, 5, 6, or 7. The present disclosure also provides programs for causing an apparatus having one or more processors to execute these methods, and non-transitory computer-readable storage media having the programs stored thereon.

[0059] 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.

[0060] This application claims priority based on Japanese Patent Application No. 2024-024786, filed February 21, 2024, the entire contents of which are incorporated herein by reference.

Claims

1. A communication device comprising: a transmitting means configured to repeatedly transmit a reference signal; a receiving means configured to receive feedback of the sensing results from a wireless device that performs sensing by receiving the reference signal; a determining means configured to determine a first period in which the wireless device performs the sensing based on the feedback of the sensing results; and a notifying means configured to notify the wireless device of the first period.

2. The communication device according to claim 1, wherein the determining means is further configured to determine a second period in which the wireless device will feedback the sensing result based on the feedback of the sensing result, and the notifying means is further configured to notify the wireless device of the second period.

3. The communication device according to claim 1 or 2, 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. The communication device of claim 1, wherein the determination means is further configured to, when determining that the first period is longer than the period for feeding back the sensing results set in the wireless device, determine a second period that is equal to or longer than the first period, and the notification means is further configured to notify the wireless device of the second period as the period for feeding back the sensing results.

5. A communication device according to any one of claims 1 to 4, wherein the sensing result includes a Doppler shift of the reference signal, and the determining means is further configured to shorten the first period as the absolute value of the Doppler shift increases.

6. A communication device according to claim 2 or 4, wherein the sensing result includes a Doppler shift of the reference signal, and the determining means is further configured to shorten the second period as the absolute value of the Doppler shift increases.

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

8. A wireless device comprising: sensing means configured to perform sensing by receiving a reference signal repeatedly transmitted by a communication device according to a set first period; and feedback means configured to feed back the sensing results to the communication device, wherein the first period is updated by the communication device.

9. A wireless device comprising: sensing means configured to perform sensing by receiving a reference signal repeatedly transmitted by a communication device according to a set first period; feedback means configured to feed back the sensing results to the communication device; and update means configured to update the first period based on the sensing results.

10. The wireless device according to claim 9, wherein the feedback means is further configured to perform the feedback in accordance with a second period set in the wireless device, and the update means is further configured to update the second period based on the sensing result.

11. The wireless device according to claim 9 or 10, wherein the first period is equal to or shorter than a period set in the wireless device for performing the feedback.

12. The wireless device according to claim 9, wherein the updating means is further configured to, when updating the first period to a period longer than the period for performing the feedback set in the wireless device, determine a second period equal to or greater than the first period, and update the period for performing the feedback to the second period.

13. A wireless device according to any one of claims 9 to 12, wherein the sensing result includes a Doppler shift of the reference signal, and the updating means is further configured to shorten the first period as the absolute value of the Doppler shift increases.

14. The wireless device according to claim 10 or 12, wherein the sensing result includes a Doppler shift of the reference signal, and the updating means is further configured to shorten the second period as the absolute value of the Doppler shift increases.

15. A computer-readable storage medium storing a program that, when executed by 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.

Images