WO2024023914A1 - 無線通信システム、位置推定方法及び無線通信装置 - Google Patents

無線通信システム、位置推定方法及び無線通信装置 Download PDF

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Publication number
WO2024023914A1
WO2024023914A1 PCT/JP2022/028736 JP2022028736W WO2024023914A1 WO 2024023914 A1 WO2024023914 A1 WO 2024023914A1 JP 2022028736 W JP2022028736 W JP 2022028736W WO 2024023914 A1 WO2024023914 A1 WO 2024023914A1
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WIPO (PCT)
Prior art keywords
wireless communication
unit
communication device
quality information
candidate beam
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PCT/JP2022/028736
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English (en)
French (fr)
Japanese (ja)
Inventor
辰彦 岩國
大誠 内田
拓人 新井
秀樹 和井
直樹 北
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NTT Inc
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Nippon Telegraph and Telephone Corp
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Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2024536581A priority Critical patent/JP7755212B2/ja
Priority to PCT/JP2022/028736 priority patent/WO2024023914A1/ja
Publication of WO2024023914A1 publication Critical patent/WO2024023914A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Definitions

  • the present invention relates to a wireless communication system, a position estimation method, and a wireless communication device.
  • Wireless communications using millimeter waves and quasi-millimeter waves classified into high frequency bands include 3GPP (3rd Generation Partnership Project) (registered trademark), 5G (5th Generation), NR (New Radio), and IEEE 802.11ad. These wireless communications have advantages over conventional microwave bands, such as being able to secure a wider band, having greater straightness, and causing less interference with other communications. Therefore, it is being put into practical use as a means for realizing large-capacity wireless (for example, see Non-Patent Document 1).
  • a wireless communication device in communication in the millimeter wave band, it is common for a wireless communication device to form a directional beam (beamforming) toward a wireless communication device with which to communicate and transmit a signal. In wireless communication devices, it is also common to form a directional beam to receive signals.
  • FIG. 7 is a diagram illustrating an example of a wireless communication system that uses beamforming in a general millimeter wave band.
  • the wireless communication system shown in FIG. 7 includes a wireless communication device 50 and a wireless communication device 60.
  • the wireless communication device 50 selects a beam that has the maximum received power by the opposing wireless communication device 60 from among the directional beams B1 to B9 (hereinafter referred to as “candidate beams”) that can be formed by the wireless communication device 50. do.
  • Beam selection is performed by a procedure called SLS (Sector Level Sweep) in, for example, IEEE802.11ad (see, for example, Non-Patent Document 2).
  • a wireless communication device (initiator) on the side that starts communication sequentially transmits signals using available beams in a time-division manner.
  • the opposing wireless communication device receives the signal transmitted from the initiator using a beam with the maximum beam width, and measures the received power.
  • the responder may sequentially transmit signals using beams.
  • beam selection by the initiator beam selection is completed by sharing with the initiator the ID of the beam for which the maximum received power was obtained in the responder.
  • SS/PBCH Synchronization Signal/Physical Broadcast CHannel
  • Non-Patent Document 3 a certain wireless communication device can send It becomes possible to estimate the position of another wireless communication device using the signal itself.
  • RTT signal round-trip time
  • Non-Patent Document 4 by performing base station switching based on the location of a wireless communication device, it becomes possible to stably switch base stations without being affected by instantaneous power fluctuations.
  • the position of a wireless communication device is generally determined outdoors using GNSS (Global Navigation Satellite System) such as GPS (Global Positioning System) or GLONASS (Global Navigation Satellite System), and indoors using BLE (Bluetooth). Positioning is generally performed using methods such as (registered trademark) Low Energy) and UWB (Ultra Wide Band).
  • GNSS Global Navigation Satellite System
  • GPS Global Positioning System
  • GLONASS Global Navigation Satellite System
  • BLE Bluetooth
  • Positioning is generally performed using methods such as (registered trademark) Low Energy) and UWB (Ultra Wide Band).
  • these positioning methods require the wireless communication device to include a positioning section such as a dedicated antenna and a positioning wireless receiving device.
  • a positioning section such as a dedicated antenna and a positioning wireless receiving device.
  • Kita “Millimeter-Wave Handover Experiment in 293 km/h Mobility Environment using Position Estimated from Wireless Communication Signal”, 2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall) , 2021, pp. 1-5, doi: 10.1109/VTC2021-Fall52928.2021.9625347.
  • Terminal positioning using communication signals itself has one problem. This is because when wireless communication devices that communicate are close to each other but their direct line-of-sight route is blocked, the signal may be transmitted by being reflected by surrounding objects.
  • FIG. 8 is a diagram for explaining the problem of terminal positioning using the communication signal itself.
  • FIG. 8 shows a situation where an object 71 exists in a direct line-of-sight path between the wireless communication device 50 and the wireless communication device 60, and an object 72 exists in the direction of the beam B9 used by the wireless communication device 50. ing.
  • the wireless communication device 60 is not necessarily present in the direction of the beam used by the wireless communication device 50.
  • the wireless communication device 50 uses wireless communication device 60 in the direction of beam B9.
  • the position of a terminal using the communication signal itself there are cases where the position of the wireless communication device cannot be accurately determined.
  • the present invention aims to provide a technology that can more accurately estimate the position of a wireless communication device using signals used for communication.
  • One aspect of the present invention is a wireless communication system including a first communication device and one or more second communication devices that communicate with the first communication device, wherein the first communication device includes a plurality of second communication devices in different directions.
  • a wireless unit that forms candidate beams and transmits a signal for each candidate beam, and receives a response to the signal received by the one or more second communication devices, based on the response received by the wireless unit, a radio control unit that acquires quality information regarding the candidate beam for each candidate beam; and a radio control unit that obtains quality information for each candidate beam with reference to correspondence information in which the quality information and position information for each candidate beam are associated with each other.
  • a position estimation unit that estimates the position of the one or more second communication devices based on the quality information for each beam, and the one or more second communication devices receive information transmitted from the first communication device.
  • a wireless communication system that sends responses to signals.
  • One aspect of the present invention is a position estimation method performed by a wireless communication system including a first communication device and one or more second communication devices that communicate with the first communication device, wherein the first communication device , forming a plurality of candidate beams in different directions and transmitting a signal for each candidate beam; receiving a response to the signal received by the one or more second communication devices; and based on the received response, transmitting a signal for each candidate beam; acquire quality information for each candidate beam, refer to correspondence information in which the quality information and position information for each candidate beam are associated, and based on the acquired quality information for each candidate beam,
  • This is a position estimation method, in which the position of a second communication device is estimated, and the one or more second communication devices transmit a response to a signal transmitted from the first communication device.
  • One aspect of the present invention is to form a plurality of candidate beams in different directions, transmit a signal for each candidate beam, and transmit quality information regarding the candidate beam obtained for each signal received by an opposing device to the candidate beam for each candidate beam.
  • the wireless communication device includes a position estimating unit that estimates position information of the opposite device.
  • FIG. 1 is a diagram illustrating a configuration example of a wireless communication system in an embodiment. It is a diagram showing an example of the functional configuration of a base station in an embodiment. It is a figure which shows an example of the quality information table in embodiment.
  • FIG. 2 is a diagram illustrating a configuration example of a wireless communication terminal (without positioning function) in an embodiment.
  • FIG. 2 is a diagram showing a configuration example of a wireless communication terminal (with a positioning function) in an embodiment.
  • 1 is a diagram illustrating an example of a wireless communication system that uses beamforming in a general millimeter wave band.
  • FIG. 2 is a diagram for explaining the problem of terminal positioning using communication signals themselves.
  • FIG. 1 is a diagram showing a configuration example of a wireless communication system 100 in an embodiment.
  • Wireless communication system 100 includes a base station 10 and a plurality of wireless communication terminals 20. Although FIG. 1 shows two wireless communication terminals 20-1 and 20-2, the wireless communication system 100 may include three or more wireless communication terminals 20.
  • the base station 10 communicates with wireless communication terminals 20-1 and 20-2. For example, the base station 10 sequentially forms a plurality of candidate beams in different directions and transmits a signal for each candidate beam.
  • a candidate beam is a beam that has directivity in a specific direction.
  • nine candidate beams B1 to B9 are shown as candidate beams formed by the base station 10.
  • the base station 10 sequentially forms candidate beams B1 to B9 and transmits a signal for each candidate beam.
  • Candidate beams B1 to B9 have different directivity directions. Note that the number of candidate beams formed by the base station 10 is not particularly limited. As shown in FIG. 1, when the base station 10 forms a candidate beam B9 and transmits a signal, the transmitted signal is reflected by an object 31 and reaches the wireless communication terminal 20-1.
  • the base station 10 receives from the wireless communication terminal 20 a response to the signal transmitted using the formed candidate beam.
  • the base station 10 acquires quality information for each candidate beam based on the received response.
  • the base station 10 estimates the position of the wireless communication terminal 20 based on the acquired quality information for each candidate beam.
  • the quality information is information regarding candidate beams, and includes, for example, the received signal strength (RSSI) of a signal (for example, a response) transmitted from the wireless communication terminal 20 obtained when the base station 10 uses the candidate beam. It may be the signal-to-noise power ratio (SNR) obtained by estimating the noise, or it may be the ID of the candidate beam actually used for communication.
  • the information may be information for specifying whether a candidate beam is used, information on transmission distance obtained by a distance estimation function (for example, RTT), or a combination thereof.
  • the wireless communication terminal 20-1 communicates with the base station 10.
  • the wireless communication terminal 20-1 is a communication device without a positioning function.
  • the positioning function is a function for positioning the wireless communication terminal 20.
  • the positioning function is, for example, a function that uses GNSS such as GPS or GLONASS to measure the position outdoors, and a function that measures the position indoors using methods such as BLE or UWB, but either method may be used.
  • Wireless communication terminal 20-1 receives a signal transmitted from base station 10, and transmits a response to the received signal to base station 10.
  • the response may be, for example, a signal indicating that a signal transmitted from the base station 10 has been received.
  • the wireless communication terminal 20-2 communicates with the base station 10.
  • the wireless communication terminal 20-2 is a communication device equipped with a positioning function.
  • Wireless communication terminal 20-2 receives the signal transmitted from base station 10, and transmits a response to the received signal to base station 10. Furthermore, in response to a request from the base station 10, the wireless communication terminal 20-2 transmits the position information measured by the positioning function to the base station 10.
  • the wireless communication terminals 20-1 and 20-2 may receive all signals transmitted by the base station 10 using each candidate beam. In some cases, it may not be possible to receive a signal. Therefore, the wireless communication terminals 20-1 and 20-2 only need to transmit to the base station 10 a response to the received signal.
  • FIG. 2 is a diagram showing an example of the functional configuration of the base station 10 in the embodiment.
  • the base station 10 includes a data processing section 11 , a radio control section 12 , a radio section 13 , an antenna 14 , an information management section 15 , a quality information storage section 16 , and a position estimation section 17 .
  • the data processing unit 11 inputs and outputs data to and from a host device located above the base station 10 or another base station. For example, the data processing unit 11 outputs the position information of the wireless communication terminal 20 estimated by the position estimating unit 17 to a host device located above the base station 10 or another base station.
  • the wireless control section 12 controls the wireless section 13. For example, the radio control unit 12 instructs the radio unit 13 to sequentially switch between a plurality of candidate beams and transmit a signal for each candidate beam. The radio control unit 12 acquires quality information for each candidate beam based on the response received by the radio unit 13 for each candidate beam. Further, when the wireless unit 13 receives the position information, the wireless control unit 12 acquires the received position information.
  • the radio unit 13 controls the amplitude or phase of the antenna 14 to form a plurality of candidate beams in different directions, and sequentially switches between the plurality of candidate beams to transmit a signal.
  • the wireless unit 13 receives a signal (for example, a response) transmitted from the wireless communication terminal 20 via the antenna 14.
  • the antenna 14 forms a plurality of candidate beams in different directions according to the control of the radio section 13.
  • the antenna 14 transmits a signal by emitting radio waves using the formed candidate beam.
  • the antenna 14 receives radio waves transmitted from the wireless communication terminal 20 using the formed candidate beams.
  • the information management unit 15 associates the quality information for each candidate beam acquired by the radio control unit 12 with position information and registers them in the quality information storage unit 16. For example, when both the quality information for each candidate beam and the position information are obtained from the radio control unit 12, the information management unit 15 associates the obtained quality information for each candidate beam with the position information. and register it in the quality information storage section 16.
  • the quality information storage unit 16 stores a quality information table.
  • the quality information table is a table in which information related to quality information is registered. In the quality information table, position information is associated with quality information for each candidate beam.
  • the position estimation unit 17 refers to the quality information table and estimates the position of the wireless communication terminal 20 based on the quality information for each candidate beam acquired by the wireless control unit 12. For example, the position estimating unit 17 estimates the position of the wireless communication terminal 20-1 that does not have a positioning function.
  • FIG. 3 is a diagram showing an example of the quality information table in the embodiment.
  • the quality information table has a plurality of records in which information regarding quality information for each candidate beam is registered. Each record has respective values of quality information and position information for each candidate beam.
  • the quality information for each candidate beam registered in each record represents quality information acquired by the radio control unit 12 based on the response received by the radio unit 13. In FIG. 3, the value of received signal strength is registered as an example of quality information.
  • the positional information registered in each record represents positional information acquired in advance by the wireless communication terminal 20 equipped with a positioning function.
  • the position information may be acquired by, for example, moving the self-propelled robot to a specified position using the wireless communication terminal 20 installed in the self-propelled robot in advance, or by using the positioning function of a smartphone or the like. If the wireless communication terminal 20-2 is equipped with the above-mentioned wireless communication terminal 20-2, the position information may be acquired using the position measurement function. In FIG. 3, the position information is illustrated as a two-dimensional value, but the position information may be three-dimensional. Furthermore, the quality information table may include information on the direction of the antenna included in the wireless communication terminal 20.
  • FIG. 4 is a diagram showing a configuration example of the wireless communication terminal 20-1 (without positioning function) in the embodiment.
  • Wireless communication terminal 20-1 includes a wireless section 21-1, an antenna 22-1, and a control section 23-1.
  • the radio section 21-1 transmits a signal via the antenna 22-1 according to instructions from the control section 23-1.
  • the wireless unit 21-1 transmits to the base station 10 a response to a signal transmitted from the base station 10.
  • the antenna 22-1 transmits and receives radio waves.
  • Antenna 22-1 converts the received radio waves into electrical signals and outputs them to radio section 21-1.
  • Antenna 22-1 radiates the signal output from radio section 21-1 as radio waves.
  • the control unit 23-1 controls the operation of the wireless communication terminal 20-1.
  • the control unit 23-1 controls the wireless unit 21-1 to transmit a response to the received signal.
  • FIG. 5 is a diagram showing a configuration example of the wireless communication terminal 20-2 (with positioning function) in the embodiment.
  • the wireless communication terminal 20-2 includes a wireless section 21-2, an antenna 22-2, a control section 23-2, and a position measuring section 24-2.
  • the radio section 21-2 transmits a signal via the antenna 22-2 according to instructions from the control section 23-2.
  • the wireless unit 21-2 transmits to the base station 10 a response to a signal transmitted from the base station 10.
  • the radio unit 21-2 transmits to the base station 10 the position information measured by the position measurement unit 24-2.
  • the antenna 22-2 transmits and receives radio waves.
  • Antenna 22-2 converts the received radio waves into electrical signals and outputs them to radio section 21-2.
  • Antenna 22-2 radiates the signal output from radio section 21-2 as radio waves.
  • the control unit 23-2 controls the operation of the wireless communication terminal 20-2. For example, the control unit 23-2 controls the wireless unit 21-2 to transmit a response to the received signal. The control unit 23-2 causes the position measuring unit 24 to measure position information according to instructions from the base station 10.
  • the position measuring unit 24-2 measures the position of the wireless communication terminal 20-2 according to instructions from the control unit 23-2.
  • FIG. 6 is a flowchart showing the flow of position estimation processing performed by the base station 10 in the embodiment.
  • the wireless control unit 12 determines whether the opposing wireless communication terminal 20 includes a position measurement unit 24 (step S101). As an example, the determination as to whether or not the opposing wireless communication terminal 20 includes the position measuring unit 24 may be made based on a connection request signal that the wireless communication terminal 20 transmits when connecting to the base station 10. Specifically, the wireless communication terminal 20 includes information indicating whether or not the wireless communication terminal 20 is equipped with the position measuring unit 24 in a connection request signal transmitted when connecting to the base station 10, and transmits the signal to the base station 10. Send.
  • the wireless control unit 12 of the base station 10 connects the opposing wireless communication terminal 20 to the opposing wireless communication terminal 20. If it is determined that the wireless communication terminal 20 to which the wireless communication terminal 20 is located is equipped with the position measurement unit 24, and information indicating that the wireless communication terminal 20 is not equipped with the position measurement unit 24 is included, the opposite wireless communication terminal 20 is located. It is determined that the measurement unit 24 is not provided. Note that this determination method is an example, and it may be determined whether or not the opposing wireless communication terminal 20 is equipped with the position measurement unit 24 using other methods.
  • the wireless control unit 12 determines that the opposing wireless communication terminal 20 includes the position measurement unit 24 (step S101-YES)
  • the wireless communication terminal 20 includes the position measurement unit 24. to measure the position and report the results (step S102).
  • the wireless control unit 12 controls the wireless unit 13 to transmit a signal including an instruction to measure the position.
  • the radio unit 13 transmits a signal including an instruction to measure the position via the antenna 14 to the radio communication terminal 20 (for example, the radio communication terminal 20-2) equipped with the position measurement unit 24. do.
  • the position measuring unit 24-2 of the wireless communication terminal 20-2 measures the position according to an instruction included in a signal transmitted from the base station 10.
  • Wireless communication terminal 20-2 transmits a signal containing the measured position information to base station 10 via antenna 22-2.
  • the base station 10 acquires the location information of the wireless communication terminal 20-2.
  • the radio control unit 12 of the base station 10 controls the radio unit 13 to transmit a signal using each candidate beam.
  • the radio unit 13 controls at least one of the amplitude and the phase of the antenna 14 under the control of the radio control unit 12, and transmits a signal using each candidate beam while sequentially changing the candidate beams (step S103).
  • the wireless communication terminal 20-2 receives a signal for each candidate beam.
  • the wireless communication terminal 20-2 transmits a response to the received signal of each candidate beam to the base station 10. Note that each time the wireless communication terminal 20-2 receives a candidate beam signal, it transmits a response to the received signal to the base station 10.
  • the radio unit 13 of the base station 10 receives responses to the signals from each candidate beam.
  • the wireless unit 13 outputs the received response to the wireless control unit 12.
  • the radio section 13 outputs the received response to the radio control section 12 every time it receives a response.
  • the wireless control unit 12 acquires quality information for each response output from the wireless unit 13 (step S104).
  • the wireless control unit 12 outputs the position information acquired in the process of step S102 and the quality information for each candidate beam acquired in the process of step S104 to the information management unit 15.
  • the information management unit 15 associates the position information output from the wireless control unit 12 with quality information for each candidate beam and registers them in the quality information table (step S105).
  • step S101 if the wireless control unit 12 determines that the opposing wireless communication terminal 20 does not include the position measuring unit 24 (step S101-NO), the wireless control unit 12 controls the wireless unit 13 to to be sent.
  • the radio unit 13 controls at least either the amplitude or the phase of the antenna 14 under the control of the radio control unit 12, and transmits a signal using each candidate beam while sequentially changing the candidate beams (step S106).
  • the wireless communication terminal 20-1 receives a signal for each candidate beam.
  • the wireless communication terminal 20-1 transmits a response to the received signal of each candidate beam to the base station 10. Note that each time the wireless communication terminal 20-1 receives a candidate beam signal, it transmits a response to the received signal to the base station 10.
  • the radio unit 13 of the base station 10 receives responses to the signals from each candidate beam.
  • the wireless unit 13 outputs the received response to the wireless control unit 12.
  • the radio section 13 outputs the received response to the radio control section 12 every time it receives a response.
  • the wireless control unit 12 acquires quality information for each response output from the wireless unit 13 (step S107).
  • the radio control unit 12 outputs the acquired quality information for each candidate beam to the position estimation unit 17.
  • the position estimating unit 17 refers to the quality information table stored in the quality information storage unit 16, and based on the quality information for each candidate beam acquired by the radio control unit 12, the position estimating unit 17
  • the position of the communication terminal 20 (for example, the wireless communication terminal 20-1) is estimated (step S108).
  • the position estimation unit 17 first reads the quality information table stored in the quality information storage unit 16. Next, the position estimating unit 17 refers to the quality information items of the candidate beams in the quality information table that has been read out, and selects the record that has the closest value to the quality information for each candidate beam acquired by the radio control unit 12. do. A combination of quality information for beams B1 to B9 is registered in one record of the quality information table. Therefore, the position estimation unit 17 selects the quality information that is closest to the combination of quality information for each candidate beam acquired by the radio control unit 12 from among the combinations of quality information for each candidate beam registered in each record of the quality information table. A combination of information will be selected.
  • the quality information and position information for each candidate beam registered in the quality information table are registered as discrete values. Therefore, the position estimation unit 17 selects the record having the closest value to the quality information for each candidate beam acquired by the radio control unit 12 by performing regression analysis.
  • the regression analysis method for example, linear regression may be used, or any method such as the k-nearest neighbor method or the random forest method may be used.
  • the position estimating unit 17 estimates the position information associated with the combination of quality information in the selected record as the position of the wireless communication terminal 20-1 that does not include the position measuring unit 24.
  • the base station 10 forms a plurality of candidate beams in different directions, transmits a signal for each candidate beam, and receives a response to the signal received by the wireless communication terminal 20.
  • a radio unit 13 a radio control unit 12 that acquires quality information regarding the candidate beam for each candidate beam based on the response received by the radio unit 13; and a position estimation unit 17 that estimates the position of the wireless communication terminal 20 based on the quality information for each candidate beam.
  • the position of the opposing wireless communication terminal 20 can be determined by referring to the quality information of each candidate beam used by the base station 10. It becomes possible to estimate. Therefore, even when communicating using a reflection path, the position of the opposing wireless communication terminal 20 can be estimated using the communication signal itself without equipping the wireless communication terminal 20 with a positioning function. Therefore, it becomes possible to estimate the position of the wireless communication device with higher accuracy using the signals used for communication.
  • the acquired position information of the wireless communication terminal 20 is associated with the quality information of the candidate beam used by the base station 10 to determine the quality. Register it in the information table. This makes it possible to estimate the position of the opposing wireless communication terminal 20 by referring to the quality information of each candidate beam used by the base station 10.
  • the wireless communication system 100 has a configuration including the wireless communication terminal 20-1 without a positioning function and the wireless communication terminal 20-2 having a positioning function. may be configured to include only the wireless communication terminal 20 without a positioning function. For example, if the correspondence information between target location information and quality information is registered in the quality information table, there is no need to newly register location information in the wireless communication system 100. Therefore, if the correspondence information between target location information and quality information is registered in the quality information table, the wireless communication system 100 may include only the wireless communication terminal 20 without a positioning function.
  • the position estimating unit 17 estimates the position of the wireless communication terminal 20 based on one piece of quality information.
  • the position estimation unit 17 may be configured to estimate the position of the wireless communication terminal 20 based on a combination of a plurality of pieces of quality information.
  • the position estimation unit 17 may estimate the position of the wireless communication terminal 20 based on a combination of received signal strength and signal-to-noise power ratio, or may use another combination.
  • the quality information table includes at least the received signal strength and signal-to-noise power ratio as quality information for each candidate beam. The value of is registered for each candidate beam.
  • the radio control unit 12 obtains the received signal strength and signal-to-noise power ratio for each candidate beam based on the response obtained from the radio communication terminal 20. Then, the position estimating unit 17 refers to the quality information table and determines whether the wireless communication terminal 20 Estimate location.
  • the base station 10 estimates the position of the wireless communication terminal 20.
  • the wireless communication terminal 20 uses the same method as the base station 10. , may be configured to estimate the location of the base station 10.
  • the wireless communication terminal 20 realizes a configuration in which the wireless unit 21, antenna 22, and control unit 23 sequentially form a plurality of candidate beams in different directions and transmit a signal for each candidate beam. It further includes an information management section 15, a quality information storage section 16, and a position estimation section 17.
  • Base station 10 receives a signal transmitted from wireless communication terminal 20 and transmits a response to the received signal to wireless communication terminal 20.
  • the base station 10 is one aspect of a first communication device, a second communication device, and a wireless communication device.
  • the wireless communication terminal 20 is one aspect of a first communication device, a second communication device, and a wireless communication device.
  • the wireless communication terminal 20 is the second communication device, and when the base station 10 is the second communication device, the wireless communication terminal 20 is the first communication device.
  • Some or all of the functional units of the base station 10 and the wireless communication terminal 20 in the embodiments described above are configured such that one or more processors such as a CPU (Central Processing Unit) It is realized as software by executing a program stored in a storage device having a storage medium (media) and a memory.
  • the program may be recorded on a computer-readable non-transitory recording medium.
  • Computer-readable non-temporary recording media include, for example, portable media such as flexible disks, magneto-optical disks, ROM (Read Only Memory), and CD-ROM (Compact Disc-ROM), and storage such as hard disks built into computer systems. It is a non-temporary recording medium such as a device.
  • Some or all of the functional units of the base station 10 and the wireless communication terminal 20 are, for example, LSI (Large Scale Integrated circuit), ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), or FPGA (Field Programmable Gate Array). ), etc., may be realized using hardware including an electronic circuit or circuitry.
  • LSI Large Scale Integrated circuit
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the present invention can be applied to a technique for estimating the position of a wireless communication device that does not have a position measurement function.

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PCT/JP2022/028736 2022-07-26 2022-07-26 無線通信システム、位置推定方法及び無線通信装置 Ceased WO2024023914A1 (ja)

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JP7797731B1 (ja) * 2024-10-23 2026-01-13 明泰科技股▲分▼有限公司 ミリ波を使用した通信方法および通信システム

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