WO2024043106A1 - 通信システムおよび通信方法 - Google Patents

通信システムおよび通信方法 Download PDF

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Publication number
WO2024043106A1
WO2024043106A1 PCT/JP2023/029153 JP2023029153W WO2024043106A1 WO 2024043106 A1 WO2024043106 A1 WO 2024043106A1 JP 2023029153 W JP2023029153 W JP 2023029153W WO 2024043106 A1 WO2024043106 A1 WO 2024043106A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio wave
wave focusing
focusing plate
radio
radio waves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/029153
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
信樹 平松
正道 米原
孝文 上濱
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP2024542747A priority Critical patent/JP7787319B2/ja
Priority to US19/104,070 priority patent/US20260051663A1/en
Publication of WO2024043106A1 publication Critical patent/WO2024043106A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/145—Passive relay systems

Definitions

  • the present disclosure relates to a communication system and a communication method.
  • the communication system of the present disclosure includes a base station installed outdoors that is configured to transmit and receive radio waves, and a base station that receives the radio waves transmitted from the base station and uses the boundary between the outdoors and indoors as a focal point. It includes a radio wave focusing plate configured to emit radio waves, and a terminal device configured to receive the radio waves emitted from the radio wave focusing plate and communicate with the base station.
  • the communication method of the present disclosure includes a step of transmitting and receiving radio waves, a step of receiving the transmitted radio waves with a radio wave concentrating plate, and emitting the radio waves with a boundary between outdoors and indoors as a focus, and a step of receiving the radio waves emitted from the radio wave concentrating plate.
  • the method includes the step of receiving the radio wave and communicating with a base station.
  • FIG. 1 is a diagram showing a configuration example of a communication system according to the first embodiment.
  • FIG. 2 is a diagram showing a configuration example of the radio wave focusing plate according to the first embodiment.
  • FIG. 3 is a diagram for explaining the focal position of the radio wave focusing plate according to the second embodiment.
  • FIG. 4 is a diagram for explaining the installation position of the terminal device according to the third embodiment.
  • FIG. 5 is a diagram for explaining a method of installing a radio wave focusing plate according to the fourth embodiment.
  • FIG. 6 is a diagram for explaining the installation angle of the radio wave focusing plate according to the fifth embodiment.
  • FIG. 7 is a diagram for explaining a method for installing a plurality of radio wave focusing plates according to the first example of the sixth embodiment.
  • FIG. 8 is a diagram for explaining a method of installing a plurality of radio wave focusing plates according to the second example of the sixth embodiment.
  • FIG. 1 is a diagram showing a configuration example of a communication system according to the first embodiment.
  • the communication system 1 includes a base station 10, a radio wave focusing plate 12, and a terminal device 14.
  • the communication system 1 is capable of high-speed high-capacity data communication, such as a fifth generation mobile communication system (hereinafter also referred to as "5G") or a sixth generation mobile communication system (hereinafter also referred to as "6G"). It can be a communication system compatible with millimeter wave communication.
  • 5G fifth generation mobile communication system
  • 6G sixth generation mobile communication system
  • the communication system 1 is configured so that a base station 10 and a terminal device 14 can communicate appropriately in each room of a housing complex such as an apartment, for example. Specifically, the communication system 1 effectively transmits the radio waves from the base station 10 to the room when the window glass of the room 2 of the apartment complex is heat ray reflective glass or heat ray absorbing glass, etc., which makes it difficult for the radio waves from the base station 10 to pass through. It is configured so that it can be drawn into 2.
  • the base station 10 is installed outdoors.
  • the base station 10 is configured to perform wireless communication with the terminal device 14.
  • the base station 10 is configured to perform wireless communication with the terminal device 14 by transmitting and receiving radio waves (millimeter waves) compatible with 5G or 6G, for example.
  • the base station 10 is configured to perform wireless communication with a terminal device 14 via a radio wave focusing plate 12.
  • the base station 10 is configured to transmit radio waves W1 toward a radio wave focusing plate 12.
  • the radio wave focusing plate 12 is installed outdoors.
  • the radio wave focusing plate 12 is, for example, formed in a rectangular shape.
  • the shape of the radio wave focusing plate 12 is not limited to a rectangle.
  • the radio wave focusing plate 12 is installed, for example, on a handrail 3 provided on the balcony of the room 2.
  • the radio wave focusing plate 12 is configured to receive radio waves from the base station 10 and emit radio waves W2.
  • the radio wave focusing plate 12 is configured to focus the radio waves W2 at a predetermined position.
  • the radio wave focusing plate 12 is configured to focus the radio waves W2 on a focal point F at the boundary between the outdoors and the indoors of the room 2.
  • the radio wave focusing plate 12 is configured to have a focal point F at the boundary between the outdoors and the indoors of the room 2.
  • FIG. 2 is a diagram showing a configuration example of the radio wave focusing plate according to the first embodiment.
  • the radio wave focusing plate 12 is made of, for example, a metamaterial that changes the phase of an incident wave.
  • the radio wave focusing plate 12 may include a substrate 20, a plurality of elements 20A, a plurality of elements 20B, a plurality of elements 20C, and a plurality of elements 20D.
  • the substrate 20 may have a rectangular shape, for example, but is not limited to this.
  • Element 20A, element 20B, element 20C, and element 20D may be formed on substrate 20.
  • Element 20A, element 20B, element 20C, and element 20D have different sizes. For example, the size increases in the order of element 20A, element 20B, element 20C, and element 20D.
  • Element 20A, element 20B, element 20C, and element 20D may differ in the amount of change in the frequency band and phase of the radio waves to be changed.
  • the elements 20A, 20B, 20C, and 20D can be arranged two-dimensionally on the substrate 20. Specifically, the element 20A may be placed at the center of the substrate 20. Element 20B, element 20C, and element 20D may be arranged around element 20A. That is, the radio wave focusing plate 12 may be configured by arranging a plurality of elements of different sizes concentrically. The focal position of the radio wave focusing plate 12 can be adjusted by changing the design of a plurality of elements of the radio wave focusing plate.
  • the radio wave focusing plate 12 is not limited to one made of metamaterial.
  • the radio wave focusing plate 12 may be, for example, a dielectric lens or a Fresnel zone plate.
  • the terminal device 14 is installed indoors.
  • the terminal device 14 is, for example, a communication device such as a smartphone that can communicate with the base station 10.
  • the terminal device 14 may be a relay device that relays between the base station 10 and a communication device such as a smartphone.
  • the terminal device 14 communicates with the base station 10 by receiving radio waves W3 drawn into the room 2 from the focal point F. Since the radio waves W3 are diffused within the room 2, the terminal device 14 can communicate with the base station 10 over a wide area of the room 2.
  • the first embodiment draws the radio waves W3 into the room by converging the radio waves W1 from the base station 10 as the radio waves W2 at the boundary between outdoors and indoors. Thereby, in the first embodiment, the base station 10 and the terminal device 14 can communicate appropriately.
  • the communication system 1 draws radio waves into the room 2 by focusing the radio waves on the boundary between outdoors and indoors.
  • the position where the radio waves are focused is preferably a location where the attenuation of the radio waves is relatively small.
  • FIG. 3 is a diagram for explaining the focal position of the radio wave focusing plate according to the second embodiment.
  • a wall 31, a resin sash 32, and a window glass 33 are shown as the boundary between the outdoors and the indoors of the room 2.
  • the wall 31 is, for example, a portion that does not include metal members such as reinforcing bars.
  • the resin sash 32 is a resin sash attached to the outer periphery of the window glass 33.
  • the window glass 33 is a normal glass member. That is, the wall 31, the resin sash 32, and the window glass 33 are parts of the boundary between the outdoors and the indoors of the room 2 where the attenuation of radio waves is relatively small.
  • the radio wave focusing plate 12 is configured such that the focal point F is located on the wall 31, the resin sash 32, and the window glass 33. Thereby, it is possible to prevent the radio waves W2 emitted by the radio wave focusing plate 12 from being attenuated at the boundary between the outdoors and the indoors of the room 2.
  • the radio waves W1 from the base station 10 are focused as the radio waves W2 on the boundary between the outdoors and indoors, where the attenuation of the radio waves is assumed to be small. Pull in radio wave W3. Thereby, the second embodiment can improve the power of the radio wave W3 received by the terminal device 14.
  • the base station 10 and the terminal device 14 communicate using radio waves W3 drawn into the room 2.
  • the terminal device 14 it is preferable that the terminal device 14 be installed at a position where it can easily receive the radio waves W3 drawn into the room 2.
  • FIG. 4 is a diagram for explaining the installation position of the terminal device according to the third embodiment.
  • the terminal device 14 is arranged in an area 40 formed by a straight line connecting a point on the periphery of the radio wave focusing plate 12 to the focal point F and extending indoors. It is preferable that In the example shown in FIG. 4, for example, a plurality of points are set at predetermined intervals along the outer periphery of the radio wave focusing plate 12, and a straight line connecting each of the plurality of set points and the focal point F on the periphery is connected indoors. It is arranged in a region 40 formed by a plurality of stretched straight lines. The region 40 is a region where the radio wave W3 is diffused. By arranging the terminal device 14 within the area 40, the terminal device 14 can appropriately receive the radio wave W3.
  • the terminal device 14 is placed in the region 40 where the radio waves W3 drawn into the room 2 are diffused. Thereby, in the third embodiment, the base station 10 and the terminal device 14 can communicate appropriately.
  • radio waves W3 are drawn into the room 2 by focusing the radio waves W1 transmitted by the base station 10 into radio waves W2 at the boundary between outdoors and indoors using the radio wave focusing plate 12.
  • the size of the radio wave focusing plate 12 is small, there is a possibility that sufficient power cannot be obtained.
  • the radio wave focusing plate 12 is defined based on the straight distance between the base station 10 and the radio wave focusing plate 12, and the straight line distance between the radio wave focusing plate 12 and the focal point F. , it is preferable to install it in the Fresnel zone.
  • FIG. 5 is a diagram for explaining a method of installing a radio wave focusing plate according to the fourth embodiment.
  • the center point C indicates the center point of the radio wave focusing plate 12.
  • Transmission point T indicates the position of the transmitting antenna of base station 10 shown in FIG.
  • a reception point R indicates the position of the focal point F shown in FIG.
  • the reception point R' indicates a virtual focal position.
  • the straight-line distance between the center point C and the reception point R is the same as the straight-line distance between the center point C and the reception point R'.
  • n is a natural number and ⁇ is the wavelength of the radio wave.
  • the annular portion in the range from radius Rn-1 to radius Rn is defined as the n-th Fresnel zone.
  • a first Fresnel zone 50, a second Fresnel zone 52, a third Fresnel zone 54, and a fourth Fresnel zone 56 are shown.
  • the first Fresnel zone 50 is a circle having a radius R1.
  • the range of the annular portion between the circle with radius R1 and the circle with radius R2 becomes the second Fresnel zone 52.
  • the length of one side of the radio wave focusing plate 12 is preferably equal to or longer than the radius of the first Fresnel zone 50. Specifically, the length of one side of the radio wave focusing plate 12 is preferably at least twice the radius of the first Fresnel zone 50, for example.
  • the radius of the nth Fresnel zone is also called the nth Fresnel radius. For example, by setting the size of the radio wave focusing plate 12 to be twice or more the first Fresnel radius, the base station 10 and the terminal device 14 can communicate appropriately.
  • the area of the radio wave focusing plate 12 is configured to be larger than the first Fresnel zone. As a result, the fourth embodiment can improve the power of the radio waves drawn into the room.
  • the radio wave W1 transmitted by the base station 10 is drawn into the room 2 by the radio wave focusing plate 12.
  • the radio waves W1 transmitted by the base station 10 may not be properly focused on the focal point F at the boundary between outdoors and indoors, and it may not be possible to obtain sufficient power. There is sex.
  • FIG. 6 is a diagram for explaining the installation angle of the radio wave focusing plate according to the fifth embodiment.
  • an arrow V1 indicates the direction of a perpendicular line to the radio wave focusing plate 12
  • an arrow V2 indicates the direction of incidence of the radio wave W1 from the base station 10 to the radio wave focusing plate 12
  • an arrow V3 indicates the center point C of the radio wave focusing plate 12. It shows the direction from to the focal point F.
  • the radio wave focusing plate 12 is installed so that when the arrow V1 is projected onto the plane formed by the arrows V2 and V3, the arrow V1 is between the arrows V2 and V3. Thereby, the radio wave focusing plate 12 can appropriately focus the radio waves W1 transmitted by the base station 10 on the focal point F.
  • the direction of the perpendicular to the radio wave focusing plate 12 is the incident direction of the radio wave W1 from the base station 10 to the radio wave focusing plate 12, and the direction from the center point C of the radio wave focusing plate 12 to the focal point F.
  • a radio wave focusing plate 12 is installed so as to be located between the two.
  • the radio wave W1 transmitted by the base station 10 is drawn into the room 2 by the radio wave focusing plate 12.
  • the range in which the radio waves W3 drawn into the room 2 from the radio wave focusing plate 12 can reach is limited, there is a possibility that proper communication will not be possible if the position of the terminal device 14 changes.
  • a plurality of radio wave focusing plates 12 are installed to draw radio waves W1 into the room 2.
  • FIG. 7 is a diagram for explaining a method for installing a plurality of radio wave focusing plates according to the first example of the sixth embodiment.
  • the communication system 1A includes, as the radio wave focusing plates 12, a radio wave focusing plate 12-1, a radio wave focusing plate 12-2, and a radio wave focusing plate 12-3.
  • the number of radio wave focusing plates 12 included in the communication system 1A is not limited.
  • the radio wave focusing plate 12-1, the radio wave focusing plate 12-2, and the radio wave focusing plate 12-3 can be arranged side by side.
  • the radio wave focusing plate 12-1 is configured to focus the radio waves W1 received from the base station 10 as radio waves W2-1 onto a focal point F set on a structure 60 provided between the outdoors and the indoors.
  • the radio wave focusing plate 12-2 is configured to focus the radio wave W1 received from the base station 10 on a focal point F as a radio wave W2-2.
  • the radio wave focusing plate 12-3 is configured to focus the radio wave W1 received from the base station 10 onto a focal point F as a radio wave W2-3. That is, the radio wave focusing plate 12-1, the radio wave focusing plate 12-2, and the radio wave focusing plate 12-3 are configured to focus the radio waves on the same focal point.
  • the radio wave W2-1 reaches indoors from the focal point F as a radio wave W3-1.
  • the radio wave W2-2 reaches indoors from the focal point F as a radio wave W3-2.
  • the radio wave W2-3 reaches indoors from the focal point F as a radio wave W3-3.
  • FIG. 8 is a diagram for explaining a method of installing a plurality of radio wave focusing plates according to the second example of the sixth embodiment.
  • the communication system 1B includes, as the radio wave focusing plates 12, a radio wave focusing plate 12-1, a radio wave focusing plate 12-2, and a radio wave focusing plate 12-3.
  • the communication system 1B is configured as shown in FIG. This is different from the communication system 1A shown in FIG.
  • the radio wave focusing plate 12-1 is configured to focus the radio wave W1 received from the base station 10 as a radio wave W2-1 on a focal point F1 set on the structure 60.
  • the radio wave focusing plate 12-2 is configured to focus the radio wave W1 received from the base station 10 as a radio wave W2-2 onto a focal point F2 set on the structure 60.
  • the radio wave focusing plate 12-3 is configured to focus the radio wave W1 received from the base station 10 as a radio wave W2-3 onto a focal point F3 set on the structure 60.
  • the radio wave W2-1 reaches indoors as a radio wave W3-1 from the focal point F1.
  • the radio wave W2-2 reaches indoors as a radio wave W3-2 from the focal point F2.
  • the radio wave W2-3 reaches indoors as a radio wave W3-3 from the focal point F3.
  • the communication system 1B can draw the radio waves W1 transmitted by the base station 10 indoors over a wide range.
  • the sixth embodiment uses a plurality of radio wave focusing plates 12 to draw the radio waves W1 from the base station 10 indoors over a wide range. Thereby, in the sixth embodiment, even if the location of the terminal device 14 changes, the terminal device 14 can appropriately communicate with the base station 10.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/JP2023/029153 2022-08-25 2023-08-09 通信システムおよび通信方法 Ceased WO2024043106A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2024542747A JP7787319B2 (ja) 2022-08-25 2023-08-09 通信システムおよび電波集束板
US19/104,070 US20260051663A1 (en) 2022-08-25 2023-08-09 Communication system and communication method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022134372 2022-08-25
JP2022-134372 2022-08-25

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0799407A (ja) * 1993-09-27 1995-04-11 Hitachi Denshi Ltd マイクロ波中継用誘電体レンズ及びそれを備えた無線中継装置
WO2019045756A1 (en) * 2017-09-01 2019-03-07 Nokia Solutions And Networks Oy REMOTELY FIXED ELECTRICAL REMOTE PASSIVE REFLECTOR WITH DIFFUSION
WO2020090682A1 (ja) * 2018-10-31 2020-05-07 株式会社村田製作所 電波中継器及び通信システム
WO2022091986A1 (ja) * 2020-10-30 2022-05-05 京セラ株式会社 通信システム、通信方法、および電波屈折板の設置方法
WO2022138397A1 (ja) * 2020-12-25 2022-06-30 Ａｇｃ株式会社 位相調整板、ガラス板、及び無線通信システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0799407A (ja) * 1993-09-27 1995-04-11 Hitachi Denshi Ltd マイクロ波中継用誘電体レンズ及びそれを備えた無線中継装置
WO2019045756A1 (en) * 2017-09-01 2019-03-07 Nokia Solutions And Networks Oy REMOTELY FIXED ELECTRICAL REMOTE PASSIVE REFLECTOR WITH DIFFUSION
WO2020090682A1 (ja) * 2018-10-31 2020-05-07 株式会社村田製作所 電波中継器及び通信システム
WO2022091986A1 (ja) * 2020-10-30 2022-05-05 京セラ株式会社 通信システム、通信方法、および電波屈折板の設置方法
WO2022138397A1 (ja) * 2020-12-25 2022-06-30 Ａｇｃ株式会社 位相調整板、ガラス板、及び無線通信システム

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JPWO2024043106A1 (https=) 2024-02-29
JP7787319B2 (ja) 2025-12-16

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