WO2024042999A1 - Dispositif de commande, procédé de commande, et support d'enregistrement - Google Patents

Dispositif de commande, procédé de commande, et support d'enregistrement Download PDF

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Publication number
WO2024042999A1
WO2024042999A1 PCT/JP2023/027698 JP2023027698W WO2024042999A1 WO 2024042999 A1 WO2024042999 A1 WO 2024042999A1 JP 2023027698 W JP2023027698 W JP 2023027698W WO 2024042999 A1 WO2024042999 A1 WO 2024042999A1
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Prior art keywords
reference signal
correlation
control
control device
channel estimation
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PCT/JP2023/027698
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English (en)
Japanese (ja)
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奕 江
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日本電気株式会社
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • the present invention relates to a control device and the like.
  • the base station can perform channel estimation by referring to SRS (Sounding Reference Signal).
  • SRS Signal Reference Signal
  • This SRS is transmitted from the UE (User Equipment) to the base station.
  • SPS Semi-Persistent Scheduling
  • the UE periodically transmits SPS SRS to the base station.
  • DCI Downlink Control Information
  • the UE transmits the aperiodic SRS to the base station.
  • periodic SRS is transmitted from the UE at a predetermined period.
  • Patent Document 1 As a related technology, there is a technology described in Patent Document 1.
  • 3GPP TS 38.300 V16.9.0 (2022-06), "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; NR and NG-RAN Overall Description; Stage 2 (Release 16)"
  • the base station performs channel estimation by referring to the SRS transmitted from the UE.
  • the wireless environment between the base station and the UE may change between receiving the previous SRS and receiving the next SRS.
  • the accuracy of channel estimation may deteriorate.
  • SPS radio access network
  • the effects of the deterioration in channel estimation accuracy may continue for a long period of time.
  • communication quality in a radio access network (RAN) may deteriorate.
  • RAN radio access network
  • an object of the present invention is to provide a control device and the like that make it possible to improve the accuracy of channel estimation.
  • control device is a control device that controls a system including a transmitting device that transmits a reference signal to a receiving device, and the receiving device that performs channel estimation using the reference signal. , correlation acquisition means for acquiring a correlation between two temporally different channel estimation results, and control for controlling transmission of the reference signal by the transmitting device to the receiving device according to the magnitude of the correlation. and means.
  • control method is a control method for a system including a transmitting device that transmits a reference signal to a receiving device, and the receiving device that performs channel estimation using the reference signal, Correlation between the two temporally different channel estimation results is obtained, and transmission of the reference signal by the transmitting device to the receiving device is controlled depending on the magnitude of the correlation.
  • a control program recorded on a computer-readable recording medium includes a transmitting device that transmits a reference signal to a receiving device, and a receiving device that performs channel estimation using the reference signal.
  • a control program for a system comprising: a correlation acquisition function for acquiring a correlation between two temporally different results of channel estimation; A control function for controlling transmission of the reference signal to the device is realized.
  • FIG. 1 is a diagram showing a configuration example of a control device according to a first embodiment of the present invention. It is a figure showing an example of an operation flow of a control device of a first embodiment of the present invention. It is a diagram showing an example of the configuration of a system including a control device according to a second embodiment of the present invention. It is a figure showing an example of composition of a control device of a second embodiment of the present invention. It is a figure showing an example of an operation flow of a control device of a second embodiment of the present invention. It is a figure which shows the example of the operation
  • a first embodiment of the present invention will be described.
  • a specific example of the control device 10 in the first embodiment is a control device 20 in a second embodiment, a control device 30 in a third embodiment, and a control device 40 in a fourth embodiment, which will be described later. be.
  • FIG. 1 shows a configuration example of the control device 10 of this embodiment.
  • the control device 10 of this embodiment includes a correlation acquisition section 11 and a control section 12.
  • the control device 10 controls a system including a transmitting device and a receiving device.
  • the transmitting device transmits the reference signal to the receiving device.
  • the receiving device performs channel estimation using the reference signal.
  • the correlation acquisition unit 11 acquires the correlation between the results of two temporally different channel estimations.
  • the control unit 12 controls the transmission of the reference signal by the transmitting device to the receiving device depending on the magnitude of the correlation.
  • FIG. 2 shows an example of the operation flow of the control device 10 of this embodiment.
  • the correlation acquisition unit 11 acquires the correlation between the results of two temporally different channel estimations (step S101).
  • the control unit 12 controls the transmission of the reference signal by the transmitting device to the receiving device depending on the magnitude of the correlation (step S102).
  • the control device 10 includes the correlation acquisition section 11 and the control section 12.
  • the control device 10 controls a system including a transmitting device and a receiving device.
  • the transmitting device transmits the reference signal to the receiving device.
  • the receiving device performs channel estimation using the reference signal.
  • the correlation acquisition unit 11 acquires the correlation between two temporally different channel estimation results.
  • the control unit 12 controls transmission of the reference signal by the transmitting device to the receiving device depending on the magnitude of the correlation. This makes it possible for the control device 10 to grasp changes in the wireless environment based on the magnitude of the correlation and control the transmission of reference signals in accordance with the changes in the wireless environment. Therefore, it becomes possible to improve the accuracy of channel estimation.
  • control device 20 Next, a control device 20 according to a second embodiment of the present invention will be described.
  • a specific example of the control device 10 in the first embodiment is the control device 20 in the second embodiment.
  • This embodiment is an example in which the control device 20 is a receiving device that receives a reference signal.
  • FIG. 3 shows a configuration example of a system including the control device 20 of this embodiment.
  • This system includes a control device 20 and a transmitter 60.
  • the control device 20 is a receiving device that receives a reference signal.
  • the transmitting device 60 transmits the reference signal to the control device 20 (receiving device).
  • the reference signal is used for channel estimation. Communication between the control device 20 and the transmitting device 60 is performed by wired communication or wireless communication.
  • control device 20 is a base station.
  • transmitting device 60 is a terminal device.
  • one or more than one transmitting device 60 can be connected to the control device 20 .
  • the reference signal is transmitted from the terminal device to the base station.
  • control device 20 may be a terminal device.
  • the transmitting device 60 is a base station.
  • one or more than one control device 20 can be connected to the transmitting device 60.
  • the reference signal is transmitted from the base station to the terminal device.
  • FIG. 4 shows a configuration example of the control device 20 of this embodiment.
  • the control device 20 includes a reference signal reception section 23 , an estimation section 24 , a correlation acquisition section 21 , and a control section 22 .
  • the reference signal receiving unit 23 receives the reference signal from the transmitting device 60.
  • the estimation unit 24 performs channel estimation using the reference signal.
  • the estimation unit 24 can use any method for channel estimation.
  • the reference signal is, for example, SRS.
  • the transmitting device 60 periodically transmits the SRS according to the settings related to the SRS transmission cycle. Further, the transmitting device 60 can transmit an SRS even when the control device 20 instructs the transmitting device to transmit an aperiodic SRS.
  • the correlation acquisition unit 21 acquires the correlation between the results of two temporally different channel estimations.
  • the correlation acquisition unit 21 calculates the correlation.
  • the correlation acquisition unit 21 may calculate the correlation between the latest channel estimation result and the channel estimation result performed a predetermined time before the latest channel estimation.
  • the correlation acquisition unit 21 may calculate the correlation between the result of the latest channel estimation and the result of channel estimation performed most recently in the past than the latest channel estimation.
  • the correlation acquisition unit 21 calculates the correlation ⁇ between the result of channel estimation based on the SRS of the nth slot and the result of channel estimation based on the SRS of the npth slot.
  • the control unit 22 controls the transmission of the reference signal depending on the magnitude of the correlation ⁇ calculated by the correlation acquisition unit 21. In the case of this embodiment, the control unit 22 controls the transmission of the reference signal by transmitting an instruction regarding the transmission of the reference signal to the transmitting device 60.
  • control unit 22 performs control to shorten the reference signal transmission interval when many states with low correlation occur.
  • the number of reference signals transmitted per unit time can be increased, so that the control device 20 can increase the frequency of channel estimation.
  • channel estimation is performed to follow the changes. Therefore, the accuracy of channel estimation can be improved. A specific control method will be described later.
  • FIG. 5 shows an example of the operation flow of the control device 20 of this embodiment.
  • the reference signal receiving unit 23 receives a reference signal from the transmitting device 60 (step S201).
  • the estimation unit 24 performs channel estimation using the reference signal (step S202).
  • the correlation acquisition unit 21 calculates the correlation ⁇ between the result of channel estimation performed this time and, for example, the result of channel estimation performed last time (step S203).
  • the control unit 22 controls the transmission of the reference signal depending on the magnitude of the correlation ⁇ (step S204). In the case of this embodiment, the control unit 22 controls the transmission of the reference signal by transmitting an instruction regarding the transmission of the reference signal to the transmitting device 60.
  • FIG. 6 is an example of the operation flow of the control device 20 of this embodiment, and is a specific example of step S204 in FIG.
  • T ⁇ a T ⁇ b
  • T ⁇ c T ⁇ d
  • T ⁇ d the correlation thresholds used may be two, T ⁇ b and T ⁇ c.
  • the correlation threshold T ⁇ a may be regarded as the lower limit of the possible values of the correlation ⁇
  • T ⁇ d the upper limit of the possible values of the correlation ⁇ .
  • the control unit 22 adds 1 to the counter Nab (step S302). Further, if the correlation ⁇ satisfies T ⁇ c ⁇ T ⁇ d (YES in step S303), the control unit 22 adds 1 to the counter Ncd (step S304). Note that the initial values of the counters Nab and Ncd are 0. Counters Nab and Ncd are reset to 0 at predetermined timing. The reset timing may be, for example, at predetermined intervals or every time channel estimation is performed a predetermined number of times.
  • control unit 22 compares the counters Nab and Ncd (step S305).
  • the control unit 22 compares the counters Nab and Ncd (step S305).
  • the control unit 22 further compares the counter Nab and the counter threshold Tab. Then, if the counter Nab is equal to or less than the counter threshold value Tab (NO in step S306), the control unit 22 shortens the transmission cycle of the reference signal. For example, the control unit 22 sets the transmitting device 60 to SPS with a shorter cycle as a setting related to SRS. In this way, by shortening the transmission period of the reference signal, the control device 20 can increase the frequency of channel estimation. As a result, when the wireless environment changes frequently, channel estimation is performed to follow the changes.
  • control unit 22 causes the transmitting device 60 to transmit an aperiodic reference signal (step S308).
  • control unit 22 instructs the transmitting device 60 to transmit an aperiodic SRS.
  • aperiodic SRS has a higher priority than semi-persistent SRS and periodic SRS. More specifically, when OFDM (Orthogonal Frequency Division Multiplexing) symbols of aperiodic SRS, semi-permanent SRS, or periodic SRS overlap, the transmitting device 60 transmits only the aperiodic SRS (Non-Patent Document 1). Therefore, by instructing the transmitting device 60 to transmit aperiodic SRS when the wireless environment is changing more frequently, the control unit 22 can adjust the reference signal transmission interval in a shorter time than by changing the transmission cycle. Can be shortened.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the control unit 22 further compares the counter Ncd and the counter threshold Tcd. If the counter Ncd is equal to or less than the counter threshold Tcd (NO in step S309), the control unit 22 maintains the current cycle as the reference signal transmission cycle (step S310).
  • the control unit 22 sets the transmitting device 60 to lengthen the period of the reference signal (step S311). For example, the control unit 22 sets the transmitting device 60 to SPS with a longer cycle as a setting related to SRS. Further, in step S311, the control unit 22 may, for example, lengthen the period of periodic SRS. In this way, by lengthening the transmission period of the reference signal, it is possible to reduce the power required for transmitting and receiving the reference signal. Furthermore, the transmitting device 60 can improve throughput.
  • the transmitting device 60 can use symbols in which no SRS exists and PRBs (physical resource blocks) as other UL (Uplink) channels.
  • Other UL channels include, for example, PUSCH (Physical Uplink Shared Channel) and PUCCH (Physical Uplink Control Channel).
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • the transmitting device 60 can improve UL throughput by using symbols and PRBs in which no SRS exists as PUSCH.
  • FIG. 7 is an example of an operation flow of the control device 20 of this embodiment, and is a specific example of step S204 in FIG.
  • one correlation threshold T ⁇ e is used.
  • the control unit 22 adds 1 to the counter Ne (step S402). Note that the initial value of the counter Ne is 0.
  • the counter Ne is reset to 0 at a predetermined timing.
  • the reset timing may be, for example, at predetermined intervals or every time channel estimation is performed a predetermined number of times.
  • the control unit 22 compares the counter Ne and the counter threshold Te. If the counter Ne is larger than the counter threshold Te (YES in step S403), the wireless environment is changing frequently. In this case, the control unit 22 performs control to shorten the reference signal transmission interval. For example, the transmitting device 60 is caused to transmit an aperiodic reference signal (step S404). Alternatively, the control unit 22 may perform control to shorten the transmission period of the reference signal in step S404. The control unit 22 can increase the frequency of channel estimation by shortening the reference signal transmission interval. As a result, when the wireless environment changes frequently, channel estimation is performed to follow the changes.
  • step S403 If the counter Ne is less than or equal to the counter threshold Te (NO in step S403), many states in which the correlation ⁇ is large occur. In this case, it is presumed that the wireless environment is stable. Therefore, the control unit 22 maintains the current cycle as the reference signal transmission cycle (step S405).
  • control unit 22 performs control to shorten the reference signal transmission interval in step S307 of FIG. 6 and step S404 of FIG. 7. Instead of this control, the control unit 22 may perform control to increase at least one of the number of SRS symbols in one slot and the number of PRBs (Physical Resource Blocks) used for one SRS transmission.
  • PRBs Physical Resource Blocks
  • Channel estimation is performed within the PRB containing the SRS symbol.
  • the number of SRS symbols in one slot or the number of PRBs used for one SRS transmission increases, the number of PRBs targeted for channel estimation increases. Therefore, when the wireless environment changes frequently, by increasing the number of SRS symbols and the number of PRBs, it is possible to suppress a decrease in the accuracy of channel estimation. As a result, the accuracy of channel estimation can be improved.
  • control unit 22 can cause the transmitting device 60 to transmit an aperiodic reference signal in step S308 of FIG. 6 or step S404 of FIG.
  • control unit 22 may control the aperiodic reference signal to increase at least one of the number of SRS symbols in one slot and the number of PRBs used for one SRS transmission.
  • control unit 22 may perform control to reduce at least one of the number of SRS symbols in one slot and the number of PRBs used for one SRS transmission. Good (step S311 in FIG. 6). Thereby, the throughput of data other than the reference signal among the data transmitted from the transmitting device 60 to the control device 20 can be improved.
  • the control device 20 includes the correlation acquisition section 21 and the control section 22.
  • the control device 20 controls a system including a transmitting device and a receiving device.
  • the transmitting device transmits the reference signal to the receiving device.
  • the receiving device performs channel estimation using the reference signal.
  • the correlation acquisition unit 21 acquires the correlation between two temporally different channel estimation results.
  • the control unit 22 controls transmission of the reference signal by the transmitting device to the receiving device depending on the magnitude of the correlation. This makes it possible for the control device 20 to grasp changes in the wireless environment based on the magnitude of the correlation, and control the transmission of the reference signal according to the changes in the wireless environment. Therefore, it becomes possible to improve the accuracy of channel estimation.
  • control unit 22 performs control to reduce the reference signal transmission interval when the number of times the correlation is smaller than the correlation threshold is greater than the comparison value.
  • the comparison value is, for example, the counter Ncd in FIG. 6 or the counter threshold Te in FIG. 7.
  • control to reduce the transmission interval is control to shorten the transmission cycle of the reference signal, or control to cause the transmitter to transmit an aperiodic reference signal.
  • control unit 22 performs control to increase the reference signal transmission interval when the number of times the correlation is greater than the correlation threshold is greater than the comparison value.
  • the comparison value is, for example, the counter threshold value Tcd in FIG.
  • the reference signal may be SRS.
  • the control device 20 can implement the above-mentioned control using the SRS.
  • the control unit 22 increases at least one of the number of SRS symbols in one slot and the number of PRBs used for one SRS transmission.
  • the comparison value is, for example, the counter Ncd in FIG. 6 or the counter threshold Te in FIG. 7.
  • the control unit 22 reduces at least one of the number of SRS symbols in one slot and the number of PRBs used for one SRS transmission. You may also perform control to Specifically, the comparison value is, for example, the counter threshold value Tcd in FIG. Thereby, the throughput of data other than reference signals can be improved.
  • control device 20 of this embodiment is a receiving device. Further, the control device 20 further includes a reference signal receiving section 23 and an estimating section 24. Reference signal receiving section 23 receives the reference signal. The estimation unit 24 performs channel estimation. The correlation acquisition unit 21 calculates the correlation. The control unit 22 controls the transmission of the reference signal by transmitting an instruction regarding the transmission of the reference signal to the transmitting device. This allows the control device 20 to implement the processing of this embodiment.
  • control device 30 Refer to a third embodiment of the present invention.
  • a specific example of the control device 10 in the first embodiment is the control device 30 in the third embodiment.
  • This embodiment is an example in which the control device 30 is a transmitting device that transmits a reference signal.
  • FIG. 8 shows a configuration example of a system including the control device 30 of this embodiment.
  • This system includes a control device 30 and a receiving device 70.
  • the control device 30 is a transmitting device that transmits a reference signal to the receiving device 70.
  • Receiving device 70 receives the reference signal.
  • the reference signal is used for channel estimation. Communication between the control device 30 and the receiving device 70 is performed by wired communication or wireless communication.
  • control device 30 may be a terminal device.
  • the receiving device 70 is a base station.
  • one or more than one control device 30 can be connected to the receiving device 70.
  • the reference signal is transmitted from the terminal device to the base station.
  • control device 30 may be a base station.
  • receiving device 70 is a terminal device.
  • one or more than one receiving device 70 can be connected to the control device 30.
  • the reference signal is transmitted from the base station to the terminal device.
  • FIG. 9 shows a configuration example of the control device 30 of this embodiment.
  • the control device 30 includes a transmitter 35 , a result receiver 36 , a correlation acquirer 31 , and a controller 32 .
  • the transmitter 35 transmits the reference signal to the receiver 70.
  • the result receiving unit 36 receives the channel estimation result from the receiving device 70.
  • Channel estimation is performed by receiving device 70. That is, the processing of the reference signal receiving section 23 and the processing of the estimating section 24 of the control device 20 of the second embodiment are performed by the receiving device 70.
  • the correlation acquisition unit 31 acquires the correlation between the results of two temporally different channel estimations. Similar to the correlation acquisition unit 21 of the control device 20, the correlation acquisition unit 31 of this embodiment calculates the correlation between the results of two temporally different channel estimations.
  • the control unit 32 controls the transmission of the reference signal according to the magnitude of the correlation ⁇ calculated by the correlation acquisition unit 31. In the case of this embodiment, the control unit 32 controls the transmission of the reference signal by the transmitting unit 35.
  • FIG. 10 shows an example of the operation flow of the control device 30 of this embodiment.
  • the result receiving unit 36 receives the channel estimation result from the receiving device 70 (step S501).
  • the correlation acquisition unit 31 calculates the correlation ⁇ between the result of channel estimation performed this time and, for example, the result of channel estimation performed last time (step S502).
  • the control unit 32 controls the transmission of the reference signal depending on the magnitude of the correlation ⁇ (step S503).
  • the control unit 32 controls the transmission of the reference signal by the transmitting unit 35.
  • the transmitter 35 transmits the reference signal under the control of the controller 32.
  • the specific control method is the same as that in the second embodiment (FIGS. 6 and 7), so the explanation will be omitted.
  • the control device 30 includes a correlation acquisition section 31 and a control section 32.
  • the control device 30 controls a system including a transmitting device and a receiving device.
  • the transmitting device transmits the reference signal to the receiving device.
  • the receiving device performs channel estimation using the reference signal.
  • the correlation acquisition unit 31 acquires the correlation between two temporally different channel estimation results.
  • the control unit 32 controls transmission of the reference signal by the transmitting device to the receiving device depending on the magnitude of the correlation. This makes it possible for the control device 30 to grasp changes in the wireless environment based on the magnitude of the correlation and control the transmission of the reference signal according to the changes in the wireless environment. Therefore, it becomes possible to improve the accuracy of channel estimation.
  • control device 30 is a transmitting device.
  • Control device 30 further includes a transmitting section 35 and a result receiving section 36.
  • the transmitter 35 transmits the reference signal to the receiver 70.
  • the result receiving unit 36 receives the channel estimation result from the receiving device 70.
  • the correlation acquisition unit 31 calculates the correlation. This allows the control device 30 to implement the processing of this embodiment.
  • control device 40 Next, a control device 40 according to a fourth embodiment of the present invention will be described.
  • a specific example of the control device 10 in the first embodiment is the control device 40 in the fourth embodiment.
  • This embodiment is an example in which the control device 40 is a transmitting device that transmits a reference signal.
  • FIG. 11 shows a configuration example of a system including the control device 40 of this embodiment.
  • This system includes a control device 40 and a receiving device 70.
  • the control device 40 is a transmitting device that transmits a reference signal to the receiving device 70.
  • Receiving device 70 receives the reference signal.
  • the reference signal is used for channel estimation. Communication between the control device 40 and the receiving device 70 is performed by wired communication or wireless communication.
  • control device 40 may be a terminal device.
  • the receiving device 70 is a base station.
  • one or more than one control device 40 can be connected to the receiving device 70.
  • the reference signal is transmitted from the terminal device to the base station.
  • control device 40 may be a base station.
  • receiving device 70 is a terminal device.
  • one or more than one receiving device 70 can be connected to the control device 40 .
  • the reference signal is transmitted from the base station to the terminal device.
  • FIG. 12 shows a configuration example of the control device 40 of this embodiment.
  • the control device 40 includes a transmitting section 45, a correlation acquiring section 41, and a controlling section 42.
  • the transmitter 45 transmits the reference signal to the receiver 70.
  • the correlation acquisition unit 41 acquires the correlation between the results of two temporally different channel estimations.
  • the correlation acquisition unit 41 of this embodiment receives the correlation ⁇ from the receiving device 70.
  • Channel estimation and correlation calculations are performed by receiving device 70. That is, the processing of the reference signal receiving section 23, the processing of the estimating section 24, and the processing of the correlation acquisition section 21 of the control device 20 of the second embodiment are performed by the receiving device 70.
  • the control unit 42 controls the transmission of the reference signal depending on the magnitude of the correlation ⁇ received by the correlation acquisition unit 41. In the case of this embodiment, the control unit 42 controls the transmission of the reference signal by the transmitting unit 45.
  • FIG. 13 shows an example of the operation flow of the control device 40 of this embodiment.
  • the correlation acquisition unit 41 receives the correlation ⁇ (step S601). Channel estimation and calculation of correlation ⁇ are performed by receiving device 70.
  • the control unit 42 controls the transmission of the reference signal depending on the magnitude of the correlation ⁇ (step S602).
  • the control unit 42 controls the transmission of the reference signal by the transmitting unit 45.
  • the transmitter 45 transmits the reference signal under the control of the controller 42.
  • the specific control method is the same as that in the second embodiment (FIGS. 6 and 7), so the explanation will be omitted.
  • the control device 40 includes a correlation acquisition section 41 and a control section 42.
  • the control device 40 controls a system including a transmitting device and a receiving device.
  • the transmitting device transmits the reference signal to the receiving device.
  • the receiving device performs channel estimation using the reference signal.
  • the correlation acquisition unit 41 acquires the correlation between two temporally different channel estimation results.
  • the control unit 42 controls transmission of the reference signal by the transmitting device to the receiving device depending on the magnitude of the correlation. This makes it possible for the control device 40 to grasp changes in the wireless environment based on the magnitude of the correlation and control the transmission of reference signals in accordance with the changes in the wireless environment. Therefore, it becomes possible to improve the accuracy of channel estimation.
  • control device 40 of this embodiment is a transmitting device.
  • Control device 40 further includes a transmitter 45 .
  • the transmitter 45 transmits the reference signal to the receiver 70.
  • the correlation acquisition unit 41 receives the correlation from the receiving device 70. This allows the control device 40 to implement the processing of this embodiment.
  • control device 10, 20, 30, 40
  • the control device may be physically or functionally realized using at least two information processing devices.
  • the control device may be realized as a dedicated device.
  • only some functions of the control device may be realized using an information processing device.
  • FIG. 14 is a diagram schematically showing an example of the hardware configuration of an information processing device that can implement the control device of each embodiment of the present invention.
  • Information processing device 90 includes a communication interface 91, an input/output interface 92, an arithmetic device 93, a storage device 94, a nonvolatile storage device 95, and a drive device 96.
  • the correlation acquisition section 11 and the control section 12 in FIG. 1 can be realized by the arithmetic device 93.
  • the communication interface 91 is a communication means for the control device of each embodiment to communicate with an external device by wire and/or wirelessly. Note that when the control device is implemented using at least two information processing devices, these devices may be connected to each other via the communication interface 91 so that they can communicate with each other.
  • the input/output interface 92 is a man-machine interface such as a keyboard as an example of an input device and a display as an output device.
  • the arithmetic unit 93 is realized by an arithmetic processing unit such as a general-purpose CPU (Central Processing Unit) or a microprocessor, and a plurality of electric circuits.
  • the arithmetic device 93 can, for example, read various programs stored in the nonvolatile storage device 95 into the storage device 94 and execute processing according to the read programs.
  • the storage device 94 is a memory device such as a RAM (Random Access Memory) that can be referenced by the arithmetic device 93, and stores programs, various data, and the like.
  • Storage device 94 may be a volatile memory device.
  • the nonvolatile storage device 95 is a nonvolatile storage device such as a ROM (Read Only Memory) or a flash memory, and is capable of storing various programs, data, and the like.
  • the drive device 96 is, for example, a device that processes data reading from and writing to a recording medium 97, which will be described later.
  • the recording medium 97 is any recording medium that can record data, such as an optical disk, a magneto-optical disk, or a semiconductor flash memory.
  • a control device is configured by the information processing device 90 illustrated in FIG. 14, and a program capable of realizing the functions described in each of the above embodiments is supplied to this control device. This may be realized by
  • the embodiment can be realized by the arithmetic device 93 executing the program supplied to the control device. Further, it is also possible to configure not all but some of the functions of the control device with the information processing device 90.
  • the program may be recorded on the recording medium 97 and stored in the non-volatile storage device 95 as appropriate during the shipping stage or operation stage of the control device.
  • the above-mentioned program may be supplied by installing it into the control device using an appropriate jig at the manufacturing stage before shipment, or at the operational stage.
  • a general procedure such as a method of downloading the program from an external source via a communication line such as the Internet may be adopted.
  • a control device that controls a system including a transmitting device that transmits a reference signal to a receiving device, and the receiving device that performs channel estimation using the reference signal, Correlation acquisition means for acquiring the correlation between the two temporally different channel estimation results;
  • a control device comprising: control means for controlling transmission of the reference signal by the transmitting device to the receiving device according to the magnitude of the correlation.
  • the control means performs control to reduce the transmission interval of the reference signal when the number of times the correlation is smaller than a correlation threshold is greater than a comparison value.
  • the control device according to supplementary note 1.
  • the control to reduce the transmission interval is control to shorten the transmission cycle of the reference signal, or control to cause the transmitter to transmit the aperiodic reference signal,
  • the control device according to supplementary note 2.
  • the control means controls to increase the transmission interval of the reference signal when the number of times the correlation is greater than a correlation threshold is greater than a comparison value.
  • the control device according to supplementary note 1.
  • the reference signal is an SRS (Sounding Reference Signal), The control device according to supplementary note 1.
  • the control means controls the number of SRS symbols in one slot and the number of PRBs (Physical Resource Blocks) used for one SRS transmission when the number of times the correlation is smaller than the correlation threshold is greater than the comparison value. control to increase at least one of the The control device according to appendix 5.
  • PRBs Physical Resource Blocks
  • the control means controls the number of SRS symbols in one slot and the number of PRBs (Physical Resource Blocks) used for one SRS transmission when the number of times the correlation is greater than a correlation threshold is greater than a comparison value. Performing control to reduce at least one of the The control device according to appendix 5.
  • PRBs Physical Resource Blocks
  • the control device is the receiving device, Reference signal receiving means for receiving the reference signal; further comprising an estimating means for performing the channel estimation,
  • the correlation acquisition means calculates the correlation,
  • the control means controls the transmission of the reference signal by transmitting an instruction regarding the transmission of the reference signal to the transmitting device.
  • the control device according to supplementary note 1.
  • the control device is the transmitting device, Transmitting means for transmitting the reference signal to the receiving device; and result receiving means for receiving the result of the channel estimation from the receiving device,
  • the correlation acquisition means calculates the correlation, The control device according to supplementary note 1.
  • the control device is the transmitting device, Further comprising: transmitting means for transmitting the reference signal to the receiving device,
  • the correlation acquisition means receives the correlation from the receiving device.
  • the control device according to supplementary note 1.
  • a control method for a system comprising a transmitting device that transmits a reference signal to a receiving device, and the receiving device that performs channel estimation using the reference signal, the method comprising: obtaining the correlation between the two temporally different channel estimation results; controlling transmission of the reference signal by the transmitting device to the receiving device according to the magnitude of the correlation; Control method.
  • a computer-readable recording medium recording a control program for a system including a transmitting device that transmits a reference signal to a receiving device, and the receiving device that performs channel estimation using the reference signal, to the computer, a correlation acquisition function that acquires the correlation between the two temporally different channel estimation results; A control function for controlling transmission of the reference signal by the transmitting device to the receiving device depending on the magnitude of the correlation.
  • a computer-readable recording medium having recorded thereon a control program.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention vise à permettre l'amélioration de la précision d'estimation de canal, et concerne à cet effet un dispositif de commande qui commande un système pourvu d'un dispositif d'émission qui émet un signal de référence à un dispositif de réception, et pourvu du dispositif de réception qui réalise une estimation de canal en utilisant le signal de référence, le dispositif de commande comprenant : un moyen d'acquisition de corrélation destiné à acquérir une corrélation entre deux résultats de l'estimation de canal différents dans le temps ; et un moyen de commande destiné à commander l'émission du signal de référence du dispositif d'émission au dispositif de réception en fonction de l'amplitude de la corrélation.
PCT/JP2023/027698 2022-08-25 2023-07-28 Dispositif de commande, procédé de commande, et support d'enregistrement WO2024042999A1 (fr)

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JP2022134134 2022-08-25

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012070445A (ja) * 2011-12-21 2012-04-05 Mitsubishi Electric Corp 無線送信装置
US20160359600A1 (en) * 2015-06-05 2016-12-08 Futurewei Technologies, Inc. Systems and Methods for Adaptive Pilot Allocation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012070445A (ja) * 2011-12-21 2012-04-05 Mitsubishi Electric Corp 無線送信装置
US20160359600A1 (en) * 2015-06-05 2016-12-08 Futurewei Technologies, Inc. Systems and Methods for Adaptive Pilot Allocation

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