WO2023105802A1 - 無線中継装置、基地局及び無線中継方法 - Google Patents

無線中継装置、基地局及び無線中継方法 Download PDF

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Publication number
WO2023105802A1
WO2023105802A1 PCT/JP2021/045708 JP2021045708W WO2023105802A1 WO 2023105802 A1 WO2023105802 A1 WO 2023105802A1 JP 2021045708 W JP2021045708 W JP 2021045708W WO 2023105802 A1 WO2023105802 A1 WO 2023105802A1
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WO
WIPO (PCT)
Prior art keywords
radio
relay device
information
signal
terminal
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/JP2021/045708
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English (en)
French (fr)
Japanese (ja)
Inventor
春陽 越後
翔平 吉岡
大輔 栗田
慎也 熊谷
優元 ▲高▼橋
聡 永田
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NTT Docomo Inc
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NTT Docomo Inc
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 NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to PCT/JP2021/045708 priority Critical patent/WO2023105802A1/ja
Priority to CN202180104725.3A priority patent/CN118355616A/zh
Priority to JP2023566072A priority patent/JPWO2023105802A1/ja
Priority to US18/716,104 priority patent/US20250047365A1/en
Publication of WO2023105802A1 publication Critical patent/WO2023105802A1/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
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a radio relay device, a base station, and a radio relay method in a radio communication system.
  • NR New Radio
  • LTE Long Term Evolution
  • Next-generation communications are expected to use high-frequency bands. Improvements in communication quality are required from the viewpoint of reducing the number of scatterers, reducing shadowing effects, increasing distance attenuation, etc., due to the characteristics of the high frequency band. It is assumed that beam control and environment etc. to ensure communication quality will be required.
  • Non-Patent Document 2 A method for improvement has been tried (for example, Non-Patent Document 2).
  • the wireless relay device establishes a connection with the base station, receives setting information, etc. in order to control the transmission direction (transmission beam).
  • a method of identifying a communication destination when receiving control information indicating the behavior of the wireless relay device is not specified.
  • the present invention has been made in view of the above points, and aims to identify a communication destination when receiving control information indicating the behavior of a wireless relay device.
  • a communication unit that relays a downlink radio signal and an uplink radio signal, a signal including control information, and identification information for identifying a transmission destination of the signal including the control information are received in the downlink. and a control unit that decodes a signal including the control information based on the identification information and performs control based on the control information.
  • a technique that makes it possible to identify a communication destination when receiving control information indicating the behavior of a wireless relay device.
  • FIG. 1 is a diagram for explaining a radio communication system according to an embodiment of the present invention
  • FIG. It is a figure showing an example of functional composition of a base station concerning an embodiment of the invention.
  • FIG. 4 is a diagram showing an example of communication in a high frequency band
  • 1 is a diagram showing an example of a reflective radio relay device according to an embodiment of the present invention
  • FIG. 1 is a diagram showing an example of a transparent radio relay device according to an embodiment of the present invention
  • FIG. It is a figure which shows an example of the hardware constitutions of the base station, terminal, or radio relay apparatus which concerns on embodiment of this invention.
  • LTE Long Term Evolution
  • LTE-Advanced LTE-Advanced and subsequent systems (eg, NR) unless otherwise specified.
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical random access channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other (for example, Flexible Duplex etc.) method may be used.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • "configuring" wireless parameters and the like may mean that predetermined values are preset (Pre-configure), and the base station 10 or A wireless parameter notified from the terminal 20 may be set.
  • FIG. 1 is a diagram for explaining a radio communication system according to an embodiment of the present invention.
  • a wireless communication system according to an embodiment of the present invention includes a base station 10 and terminals 20, as shown in FIG.
  • a plurality of base stations 10 and terminals 20 may be provided.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • Physical resources of radio signals are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. good too.
  • a TTI Transmission Time Interval
  • a TTI Transmission Time Interval
  • TTI Transmission Time Interval
  • the base station 10 can perform carrier aggregation in which multiple cells (multiple CCs (component carriers)) are bundled and communicated with the terminal 20 .
  • multiple CCs component carriers
  • carrier aggregation one primary cell (PCell, Primary Cell) and one or more secondary cells (SCell, Secondary Cell) are used.
  • the base station 10 transmits a synchronization signal, system information, etc. to the terminal 20.
  • Synchronization signals are, for example, NR-PSS and NR-SSS.
  • System information is transmitted, for example, on NR-PBCH or PDSCH, and is also called broadcast information.
  • the base station 10 transmits control signals or data to the terminal 20 on DL (Downlink) and receives control signals or data from the terminal 20 on UL (Uplink).
  • control channels such as PUCCH and PDCCH
  • data what is transmitted on a shared channel such as PUSCH and PDSCH is called data.
  • the terminal 20 is a communication device with a wireless communication function, such as a smartphone, mobile phone, tablet, wearable terminal, or M2M (Machine-to-Machine) communication module. As shown in FIG. 1 , the terminal 20 receives control signals or data from the base station 10 on the DL and transmits control signals or data to the base station 10 on the UL, thereby performing various functions provided by the wireless communication system. Use communication services. Note that the terminal 20 may be called UE, and the base station 10 may be called gNB.
  • the terminal 20 can perform carrier aggregation in which multiple cells (multiple CCs) are bundled and communicated with the base station 10 .
  • Multiple CCs multiple CCs
  • One primary cell and one or more secondary cells are used in carrier aggregation.
  • a PUCCH-SCell with PUCCH may also be used.
  • the base station 10 is, for example, a radio base station operated in 5G or 6G, and forms a cell.
  • a cell is a cell with a relatively large size and is called a macro cell.
  • the base stations 10A to 10D are base stations operated by 5G or 6G.
  • the base stations 10A-10D respectively form cells CA-cell D, which are smaller in size than the macrocell.
  • Cell A-cell D may be called a small cell, a macro cell, or the like. As shown in FIG. 1, cells A-cell D may be formed to be included in a macrocell.
  • a macrocell may generally be interpreted as a communicable area with a radius of several hundred meters to several tens of kilometers covered by one base station. Also, a small cell may be interpreted as a generic term for cells that have low transmission power and cover a smaller area than a macro cell.
  • the base station 10 and the base stations 0A to 10D may be denoted as gNodeB (gNB) or BS (Base Station).
  • the terminal 20 may be denoted as UE, MS, or the like.
  • the specific configuration of the wireless communication system including the numbers and types of base stations and terminals, is not limited to the example shown in FIG.
  • the wireless communication system is not necessarily limited to a wireless communication system according to 5G or 6G.
  • the wireless communication system may be a 6G next-generation wireless communication system or a wireless communication system according to LTE.
  • the base station 10 and the base stations 10A to 10D perform wireless communication with the terminal 20 according to 5G or 6G.
  • Base station 10 and base station 10A-base station 10D and terminal 20 control radio signals transmitted from a plurality of antenna elements to generate beams with higher directivity (Massive MIMO), a plurality of Carrier aggregation (CA) that bundles component carriers (CC), dual connectivity (DC) that simultaneously communicates between terminal 20 and two NG-RAN nodes, and radio between wireless communication nodes such as gNB It may correspond to IAB (Integrated Access and Backhaul) in which the backhaul and radio access to the terminal 20 are integrated, or the like.
  • IAB Integrated Access and Backhaul
  • the wireless communication system can support high frequency bands higher than the following frequency range (Frequency Range, FR) specified in 3GPP Release 15.
  • FR1 may correspond to 410 MHz-7.125 GHz
  • FR2 may correspond to 24.25 GHz-52.6 GHz.
  • the wireless communication system may support frequency bands above 52.6 GHz and up to 114.25 GHz. This frequency band may be referred to as the millimeter wave band.
  • the base station 10 supporting massive MIMO can transmit beams.
  • Massive MIMO generally means MIMO communication using an antenna having 100 or more antenna elements, and enables faster wireless communication than before due to the effect of multiplexing multiple streams.
  • Advanced beamforming is also possible.
  • the beam width can be dynamically changed according to the frequency band to be used, the state of the terminal 20, or the like. Also, it is possible to increase the received signal power by beam forming gain by using a narrow beam. Furthermore, effects such as reduction of interference and effective use of radio resources are expected.
  • the wireless communication system may include the wireless relay device 30 .
  • the radio relay device 30 includes a reflector (RIS), a metamaterial functional device, a power saving device (Battery less device), a phase control reflector, a passive repeater, an IRS (intelligent reflective surface : Intelligent Reflecting Surface), Smart Repeater, Network Controlled Repeater, etc.
  • RIS reflector
  • metamaterial functional device e.g., a metal-oxide
  • a power saving device Battery less device
  • phase control reflector e.g., a phase control reflector
  • passive repeater e.g., a passive repeater
  • IRS intelligent Reflecting Surface
  • Smart Repeater e.g., Intelligent Reflecting Surface
  • the radio relay device 30 relays radio signals transmitted from the base station 10A, for example.
  • “relay” may refer to at least one of “reflection”, “transmission”, “concentration (concentrating radio waves to approximately one point)", and “diffraction”.
  • the terminal 20 can receive the radio signal relayed by the radio relay device 30 .
  • the radio relay device 30 may relay a radio signal transmitted from the terminal 20 or may relay a radio signal transmitted from the base station 10 .
  • the radio relay device 30 can change the phase of the radio signal relayed to the terminal 20 .
  • the radio relay device 30 may be called a variable phase reflector.
  • the radio relay device 30 may have a function of changing the phase of a radio signal and relaying it, but the present invention is not limited to this.
  • the wireless relay device 30 may be called a repeater, a relay device, a reflect array, a transmit array, or the like.
  • the wireless relay device 30 may be defined as having the functions shown in 1)-5) below.
  • the signals may have a function of receiving signals transmitted from the base station 10 .
  • the signals are DL signals, SSB (SS/PBCH block), PDCCH, PDSCH, DM-RS (Demodulation Reference Signal), PT-RS (Phase Tracking Reference Signal), CSI-RS (Channel Status Information Reference Signal) , RIS dedicated signals, and the like. It may also be capable of receiving signals carrying information relating to metamaterial function. In addition, it may have a transmission function for transmitting the signal to the terminal 20 .
  • the signals may have a function of transmitting signals to the base station 10 .
  • the signals may be PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signals, etc., which are UL signals. It may have a function of transmitting information related to the metamaterial function. In addition, it may have a reception function for receiving the signal from the terminal 20 .
  • It may have a frame synchronization function with the base station 10 .
  • a frame synchronization function with the terminal 20 may be provided.
  • the reflection function includes a function related to phase change, a function related to beam control (for example, TCI (Transmission Configuration Indication)-state, a function related to QCL (Quasi Co Location) control, beam selection application, spatial filter / selective application of precoding weights).
  • the power modification function may be power amplification.
  • receiving and transmitting and “relaying" in the wireless relay device 30 means that although function A below is performed, transmission is performed without performing function B below.
  • Function A Apply phase shifters and compensation circuits.
  • Function B No frequency conversion is involved.
  • the amplitude may be amplified when the phase is changed in the wireless relay device 30 such as the RIS.
  • “relay” in the wireless relay device 30 such as RIS means transmitting the received signal as it is without performing layer 2 or layer 3 level processing, or transmitting the signal received at the physical layer level as it is. Alternatively, it may mean transmitting the received signal as it is without interpreting the signal (at that time, phase change, amplitude amplification, etc. may be performed).
  • the base station 10, the terminal 20, and the radio relay device 30 include functions for executing embodiments described later. However, each of the base station 10, the terminal 20 and the radio relay device 30 may have only one of the functions of the embodiments.
  • FIG. 2 is a diagram showing an example of the functional configuration of the base station according to the embodiment of the present invention.
  • the base station 10 has a transmitter 110 , a receiver 120 , a setter 130 and a controller 140 .
  • the functional configuration shown in FIG. 2 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.
  • the transmitting unit 110 and the receiving unit 120 may be called a communication unit.
  • the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal.
  • the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, higher layer information from the received signals.
  • the transmitting unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DL data, etc. to the terminal 20 . Also, the transmission unit 110 transmits setting information and the like to be described in the embodiments.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads them from the storage device as necessary.
  • the control unit 140 performs, for example, resource allocation, overall control of the base station 10, and the like. It should be noted that the functional unit related to signal transmission in control unit 140 may be included in transmitting unit 110 , and the functional unit related to signal reception in control unit 140 may be included in receiving unit 120 . Also, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.
  • FIG. 3 is a diagram showing an example of the functional configuration of the terminal according to the embodiment of the invention.
  • the terminal 20 has a transmitter 210 , a receiver 220 , a setter 230 and a controller 240 .
  • the functional configuration shown in FIG. 3 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.
  • the transmitting unit 210 and the receiving unit 220 may be called a communication unit.
  • the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
  • the receiving unit 220 wirelessly receives various signals and acquires a higher layer signal from the received physical layer signal. Also, the transmitting unit 210 transmits HARQ-ACK, and the receiving unit 220 receives setting information and the like described in the embodiments.
  • the setting unit 230 stores various types of setting information received from the base station 10 by the receiving unit 220 in the storage device, and reads them from the storage device as necessary.
  • the setting unit 230 also stores preset setting information.
  • the control unit 240 controls the terminal 20 as a whole. It should be noted that the functional unit related to signal transmission in control unit 240 may be included in transmitting unit 210 , and the functional unit related to signal reception in control unit 240 may be included in receiving unit 220 . Also, the transmitting section 210 and the receiving section 220 may be called a transmitter and a receiver, respectively.
  • FIG. 4 is a diagram showing an example of the functional configuration of the radio relay device according to the embodiment of the present invention.
  • the radio relay device 30 has a transmitting section 310 , a receiving section 320 , a control section 330 , a variable section 340 and an antenna section 350 .
  • the functional division and the names of the functional units may be arbitrary.
  • the transmitting unit 310 and the receiving unit 320 may be called a communication unit.
  • the antenna section 350 includes at least one antenna connected to the variable section 340 .
  • the antenna section 350 may be arranged as an array antenna.
  • the antenna section 350 may be particularly called a relay antenna.
  • the variable section 340 and the antenna section 350 may be called a relay section.
  • variable section 340 is connected to the antenna section 350 and can change the phase, load, amplitude, and the like.
  • variable section 340 may be a variable phase shifter, phase shifter, amplifier, or the like. For example, by changing the phase of the radio wave that reaches the relay antenna from the radio wave source, the direction or beam of the radio wave can be changed.
  • the control unit 330 is control means for controlling the variable unit 340 .
  • the control unit 330 functions as a control unit that controls the relay state when relaying radio waves from the base station 10 or the terminal 20 without signal interpretation.
  • the control unit 330 may change the relay state based on control information received from the base station 10 or the terminal 20 via the communication unit. to change the relay state. For example, based on control information such as SSB, the control unit 330 may select (directions of) appropriate reception beams and transmission beams and control the variable unit 340 .
  • control section 330 may select an appropriate combination of reception direction and transmission direction based on criteria such as the highest reception quality or reception power from the reception state, and control variable section 340 .
  • the control unit 330 includes, for example, information on the propagation path between the terminal 20 or the base station 10A and the antenna unit 350 (including information estimated from the reception state and control information. ), the variable section 340 can be controlled.
  • the control unit 330 uses a known method such as an active repeater or RIS to change the phase of the radio wave received from the base station 10A without using the transmission power, so that the radio wave receiving destination (in this case, the terminal 20) can be relayed in a specific direction.
  • the control unit 330 controls the phase of the radio signal for relaying to the terminal 20 or base station 10A.
  • the wireless relay device 30 controls (changes) only the phase of the wireless signal (radio wave) by the control unit 330, and relays the wireless signal without power supply without amplifying the power of the wireless signal to be relayed. You may
  • control unit 330 may acquire information according to the reception state. Also, the receiving unit 320 may acquire control information from the base station 10A or the terminal 20 . For example, the receiving unit 320 may receive various signals such as SSB (including various signals exemplified in the functions described above) transmitted from the base station 10A or the terminal 20 as control information.
  • SSB including various signals exemplified in the functions described above
  • control unit 330 controls the propagation path between the radio wave source (eg, the base station 10A or the terminal 20) and the antenna unit 350 based on the reception state (eg, change in received power) when the variable unit 340 is controlled.
  • Information H PT and H RP ) may be estimated.
  • the propagation path information (propagation channel information) on each propagation path is specifically information such as amplitude or phase.
  • the control unit 330 based on the same principle as I/Q (In-phase/Quadrature) detection, changes the received power when switching the phase of the variable unit 340 of the array-shaped antenna unit 350 to orthogonal.
  • the propagation path information of the antenna unit 350 may be estimated by using the
  • FIG. 5 is a diagram showing an operation example of the wireless relay device according to the embodiment of the present invention.
  • the radio relay device 30 is interposed between the base station 10A (other base stations 10 or the like) and the terminal 20, and is interposed between the base station 10A and the terminal 20. relays (reflects, transmits, aggregates, diffracts, etc.) radio signals transmitted and received in
  • the base station 10A and the terminal 20 directly transmit and receive wireless signals without going through the wireless relay device 30 when the wireless quality is good.
  • the radio relay device 30 relays radio signals transmitted and received between the base station 10A and the terminal 20. do.
  • the radio relay apparatus 30 based on the change in the received power during control of the variable unit 340 such as a variable phase shifter, transmits the propagation path information between the radio wave source such as the base station 10A or the terminal 20 and the relay antenna.
  • the radio signal is relayed to the radio wave receiving destination such as the terminal 20 .
  • the radio relay apparatus 30 is not limited to estimating the channel information H PT and H RT , and controls the variable section 340 such as a variable phase shifter based on the control information received from the base station 10A or the terminal 20.
  • the radio signal may be relayed toward the radio wave reception destination such as the base station 10A or the terminal 20.
  • a propagation path or a propagation channel is an individual communication path of wireless communication, and here is a communication path between each transmitting/receiving antenna (base station antenna, terminal antenna, etc. in the figure).
  • the radio relay apparatus 30 includes an antenna section 350 having a small multi-element antenna compatible with Massive MIMO, and a variable phase shifter or phase shifter that changes the phase of a radio signal, substantially a radio wave, to a specific phase. and using the variable unit 340, the phase of the radio wave relayed to the terminal 20 or the base station 10A is controlled.
  • FIG. 6 is a diagram showing an example of communication in a high frequency band.
  • FIG. 6 in the case of using a high frequency band of several GHz to several tens of GHz or more, dead zones are likely to occur due to the strong rectilinearity of radio waves.
  • the line between the base station 10A and the terminal 20 is visible, wireless communication between the base station 10A and the terminal 20 is not affected even when the high frequency band is used.
  • the radio quality is greatly degraded. That is, when the terminal 20 moves to a dead zone blocked by a shield, communication may be interrupted.
  • the passive type has the advantage of not requiring control information, but cannot follow moving objects or environmental changes.
  • the active type has the disadvantage of requiring control information and increasing overhead. Fluctuations and the like can also be followed.
  • FB feedback
  • propagation path information norms propagation path information norms.
  • the variable radio wave propagation control device searches for the optimum condition by having the terminal 20 or the like feed back the communication state when the load (phase) state is changed at random.
  • the propagation path information standard the load state is determined based on the propagation path information between the base station and the radio wave propagation control device, and optimum radio wave propagation control becomes possible. Either type is applicable in the embodiment of the present invention.
  • Non-Patent Document 2 As relay methods, there are types such as reflection, transmission, diffraction, and consolidation. See Non-Patent Document 2, etc.).
  • FIG. 7 is a diagram showing an example of a reflective wireless relay device according to an embodiment of the present invention.
  • An example of the system configuration of the reflective radio relay device 30 will be described with reference to FIG.
  • FIG. 7 is a diagram showing the relationship among the transmitting antenna Tx of the base station 10A and the like, the relay antenna Sx of the transmissive radio relay device 30, and the receiving antenna Rx of the terminal 20 and the like.
  • MIMO is taken as an example, and there are a plurality of propagation paths between Tx-Sx and a plurality of propagation paths between Sx-Rx.
  • the device 30 relays radio waves by controlling a variable section 340 having a variable phase shifter or the like of the relay antenna Sx.
  • the arrayed relay antennas are arranged facing the same direction. Thereby, the propagation path of the relay antenna can be estimated based on the reception state observed when the phase conditions of the relay antenna are changed in a plurality of ways.
  • FIG. 8 is a diagram showing an example of a transparent wireless relay device according to the embodiment of the present invention.
  • An example of the system configuration of the transparent wireless relay device 30 will be described with reference to FIG.
  • FIG. 8 is a diagram showing the relationship among the transmitting antenna Tx of the base station 10A and the like, the relay antenna Sx of the transmissive radio relay device 30, and the receiving antenna Rx of the terminal 20 and the like.
  • MIMO is taken as an example, and there are a plurality of propagation paths between Tx and Sx and a plurality of propagation paths between Sx and Rx.
  • the relay device 30 relays radio waves arriving from one side to the other side via a variable section 340 such as a variable phase shifter of the relay antenna Sx.
  • a variable section 340 such as a variable phase shifter of the relay antenna Sx.
  • the reference antenna on the left side of the figure and the relay antenna on the right side of the figure are paired and directed in opposite directions so that radio waves arriving from one side can be relayed to the other side. are placed.
  • a power detector or the like may be configured to detect the power reaching the relay antenna, and the reception state may be measured. Further, the propagation path of the relay antenna can be estimated based on the received signals observed when the phase conditions of the relay antenna are varied.
  • future networks such as 6G will require even higher quality than 5G.
  • ultra-high speed on the order of tera bps, high reliability and low delay on the level of optical communication, etc. are required.
  • very high frequencies such as terahertz waves
  • terahertz waves it is assumed that the advantages of high speed due to the use of ultra-wideband and low delay due to the short symbol length are narrowed by the large attenuation rate.
  • drawbacks such as a decrease in reliability due to the high straightness.
  • 6G communication it is required to consider how to ensure redundancy, that is, how to increase the number of communication transmission points.
  • the radio relay device 30 reflects or transmits a beam transmitted from the base station 10 or the terminal 20 in a predetermined direction and delivers it to the terminal 20 or the base station 10.
  • the wireless relay device 30 may be, for example, a passive RIS, an active RIS, or the like.
  • Passive RIS is a device that does not change the control of the reflection angle or beam width according to the position of the mobile station, and while control information is unnecessary, precise beam control is difficult.
  • the active RIS is a device that changes the control of the reflection angle, beam width, etc. according to the position of the mobile station, and although precise beam control is possible, overhead increases because control information is required.
  • the wireless relay device 30 can increase the number of communication transmission points.
  • the wireless relay device 30 may be a device having a predetermined function, and the predetermined function may be, for example, at least one of 1) and 2) shown below.
  • the radio relay device 30 has a function of receiving signals transmitted from the base station 10 (for example, DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, RIS dedicated signals). may have.
  • the wireless relay device 30 may receive information related to the following 2) metamaterial function by the receiving function.
  • the radio relay device 30 may have a function of transmitting signals to the base station 10 (for example, UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS-dedicated signals).
  • the wireless relay device 30 may transmit information related to the following 2) metamaterial function using the transmission function.
  • the radio relay device 30 may have a frame synchronization function with the base station 10 .
  • the radio relay device 30 may have a function of reflecting signals (for example, changing the phase) transmitted from the base station 10 or the terminal 20 .
  • the wireless relay device 30 may reflect the signal by changing the phase for each of the plurality of reflecting elements included in the wireless relay device 30, or may reflect the signal by changing the phase in common with the plurality of reflecting elements.
  • the radio repeater 30 may have functions related to beam control (eg, functions related to TCI-state, QCL control, beam selection application, spatial filter/precoding weight selection application).
  • the radio relay device 30 may have a power changing function (for example, power amplification) for signals transmitted from the base station 10 or the terminal 20 .
  • the wireless relay device 30 may perform different power changes for each reflecting element of the wireless relay device 30, or may perform common power changes for a plurality of reflecting elements.
  • Receiveive and transmit in the wireless relay device 30 may mean reflecting radio waves/signals.
  • base station and “terminal” are used hereinafter, they are not limited to these terms and may be replaced by communication devices.
  • the wireless relay device 30 can establish connection with the base station, initialize setting information (Predefine), and the like.
  • RNTI is an example of identification information for identifying the destination of a signal.
  • the radio relay device 30 may use the RNTI for the radio relay device 30 to decode the signal.
  • the RNTI for the radio relay device 30 may be, for example, "RIS-RNTI”
  • the RNTI for the radio relay device 30 may be a type of RNTI such as "C-RNTI", "SI-RNTI”, etc.
  • the RNTI specified exclusively for the radio relay device 30 may coexist with the RNTI.
  • the RNTI for the radio relay device 30 may be assigned to a device other than the radio relay device 30 in addition to the radio relay device 30 .
  • the RNTI for the radio relay device 30 may include multiple types, such as “RIS1-RNTI” and “RIS2-RNTI”.
  • the RNTI for the radio relay device 30 is "C-RIS-RNTI”, which is the RNTI for the radio relay device 30, for RNTIs such as “C-RNTI”, “SI-RNTI”, etc. , “SI-RIS-RNTI” and the like.
  • the radio relay device 30 may decode the signal using the RNTI assigned by the method shown in any of the following options.
  • the radio relay device 30 may decode the signal using the RNTI commonly assigned to all the radio relay devices 30 within the same cell.
  • the wireless relay device 30 may assume that the RNTI is determined according to a predetermined rule.
  • the specification may define the type of RNTI for the radio relay device 30 .
  • the radio relay device 30 may decode the signal based on the RNTI assigned based on the specified type of RNTI. This eliminates the need to communicate information about the RNTI, thereby reducing communication overhead.
  • all wireless relay devices 30 within the same cell can decode the same signal. It can be used when the wireless relay device 30 receives a TDD pattern or the like.
  • the radio relay device 30 may decode the signal using the RNTI commonly assigned to the plurality of radio relay devices 30 .
  • the wireless relay device 30 determines whether each DCI is addressed to itself, the format of each DCI is addressed to itself, or which of the fields included in the DCI is addressed to itself based on the setting of the upper layer. It may be determined whether For example, the radio relay apparatus 30 may be set to which group it belongs to, and may determine that a signal scrambled with the RNTI corresponding to the set group is addressed to itself.
  • the type of RNTI for the wireless relay device 30 may be determined by the specifications according to the type of the wireless relay device 30 .
  • the radio relay device 30 may decode the signal based on the RNTI assigned based on the specified type of RNTI.
  • RNTI types may be classified according to the following types. Alternatively, classification according to other types may be used.
  • the number of beams that can be directed by the radio repeater 30 The direction in which the radio repeater 30 transmits beams (for example, whether multiple beams can be swept horizontally, vertically, or both horizontally and vertically)
  • the classification may also be based on whether the beams can be swept in the horizontal direction or the vertical direction, etc. Here, the classification may be based on the number of beams supported in the horizontal and vertical directions.)
  • the radio relay device 30 may decode the signal using the RNTI individually assigned to each radio relay device 30 .
  • the wireless relay device 30 may assume that each wireless relay device 30 is assigned an individual RNTI at the time of initial connection.
  • the wireless relay device 30 may assume that an individual RNTI is assigned to each wireless relay device 30 in advance before connection. For example, when the operator installs the wireless relay device 30 , this corresponds to a case where each wireless relay device 30 is set in advance.
  • Radio relay device 30 may determine the information contained in the signal according to the assigned RNTI.
  • the radio relay device 30 may determine what the control information (eg DCI) is from the RNTI. For example, the radio relay device 30 may determine from the RNTI which fields the DCI contains. Also, the radio relay device 30 may determine from the RNTI whether the control is between the base station 10 and the radio relay device 30 or between the radio relay device 30 and the terminal 20 .
  • the control information eg DCI
  • the radio relay device 30 may determine from the RNTI which fields the DCI contains. Also, the radio relay device 30 may determine from the RNTI whether the control is between the base station 10 and the radio relay device 30 or between the radio relay device 30 and the terminal 20 .
  • the radio relay device 30 may determine the amount of information included in the control information (eg, DCI) from the RNTI. For example, the radio relay device 30 may determine from the RNTI how many bits the DCI contains.
  • DCI control information
  • the radio relay device 30 may determine a signal transmission/reception resource according to the assigned RNTI.
  • the radio relay device 30 may determine from the RNTI how channels (eg PDSCH/PUSCH) for transmitting and receiving control information (eg MAC-CE) are allocated.
  • RNTI e.g PDSCH/PUSCH
  • control information e.g MAC-CE
  • the radio relay device 30 may determine information about the TDRA/FDRA/directed beam from the RNTI.
  • the radio relay device 30 may determine the encoding/decoding method according to the assigned RNTI.
  • the radio relay device 30 may determine the following information according to the RNTI. • Which MCS (Modulation and Coding Scheme)-Table to refer to. - To which terminal is the transmitted/received information addressed?
  • the RNTI for the radio relay device 30 can be used to decode the signal.
  • the radio relay device 30 can receive, for example, control information indicating control details of the radio relay device 30 from the base station 10 .
  • Radio relay device 30 may decode the signal using the RNTI for terminal 20 .
  • the radio relay device 30 may use “C-RNTI” as the RNTI for the terminal 20.
  • the radio relay device 30 may decode the signal using the RNTI assigned by the method shown in any of the following options.
  • Radio relay 30 may assume that the type of RNTI used by terminal 20 is assigned to radio relay 30 .
  • the radio relay device 30 may assume that the “C-RNTI” is assigned to the radio relay device 30 .
  • the UE function of the radio relay device 30 can be implemented without affecting the conventional specifications.
  • the radio relay device 30 may decode the signal using the RNTI assigned to the terminal 20 .
  • the radio relay device 30 may store information indicating the RNTI assigned to a specific terminal 20 and decode the control signal transmitted to the terminal 20 corresponding to the stored RNTI.
  • the radio relay device 30 receives identification information for identifying the connected terminal 20 from the base station 10 or the terminal 20, and stores information indicating the RNTI assigned to the terminal 20 indicated by the identification information.
  • the connected terminal 20 may be at least one of the following. Also, the connected terminal 20 may be another terminal.
  • a terminal whose radio relay device 30 holds specific information for example, C-RNTI of each terminal 20.
  • a terminal capable of communicating with the radio relay device 30 in an upper layer for example, RRC.
  • each radio relay device 30 may report to the base station 10 the maximum number of RNTIs that can be stored or the number of connectable terminals.
  • the radio relay device 30 can decode the control signal addressed to the terminal 20. Therefore, the base station 10 does not need to re-transmit the control information transmitted to the terminal 20 to the wireless relay device 30, thereby reducing communication overhead.
  • the wireless relay device 30 may execute option 1 and option 2 in combination. In that case, the radio relay device 30 may decode the signal using the type of RNTI used by the terminal 20 assigned to the radio relay device 30 or using the RNTI assigned to the particular terminal 20 .
  • the radio relay device 30 by decoding the signal using the RNTI for the terminal 20, it is possible to identify the communication destination when receiving the control information indicating the behavior of the radio relay device. can.
  • the wireless relay device and base station of the present embodiment may be configured as the wireless relay device and base station shown in each section below. Also, the following wireless relay method may be implemented.
  • (Section 1) a communication unit that relays downlink radio signals and uplink radio signals; a receiving unit that receives a signal including control information and identification information for identifying a transmission destination of the signal including the control information on a downlink; a control unit that decodes a signal containing the control information based on the identification information and performs control based on the control information; Radio repeater.
  • the identification information is identification information for identifying the wireless relay device, When the identification information indicates the device itself, the control unit decodes a signal containing the control information and performs control based on the control information.
  • the radio relay device according to Claim 1.
  • the identification information is identification information for identifying a terminal, When the identification information indicates the device itself, the control unit decodes a signal containing the control information and performs control based on the control information.
  • the radio relay device according to Claim 1. (Section 4) The identification information is identification information for identifying a terminal, When the identification information indicates a predetermined terminal, the control unit decodes a signal including the control information and performs control based on the control information.
  • the radio relay device according to Claim 1.
  • (Section 5) a transmission unit that transmits a signal including control information and identification information for identifying a transmission destination of the signal including the control information to a radio relay apparatus that relays the downlink radio signal and the uplink radio signal;
  • a control unit that assumes that the radio relay device decodes a signal containing the control information based on the identification information and performs control based on the control information.
  • base station (Section 6) relaying the downstream radio signal and the upstream radio signal; receiving on the downlink a signal containing control information and identification information for identifying a destination of the signal containing the control information; Decoding a signal containing the control information based on the identification information, and performing control based on the control information.
  • a wireless relay method executed by a wireless relay device.
  • any of the above configurations provides a technology that enables identification of a communication destination when receiving control information indicating the behavior of the wireless relay device.
  • the communication destination can be identified based on the identification information for identifying the wireless relay device.
  • the communication destination can be identified.
  • the identification information for identifying the terminal indicates the terminal itself, the communication destination can be identified.
  • the identification information for identifying the terminal indicates a predetermined terminal, the communication destination can be identified.
  • each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separated devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
  • a functional block may be implemented by combining software in the one device or the plurality of devices.
  • Functions include judging, determining, determining, calculating, calculating, processing, deriving, examining, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't
  • a functional block (component) responsible for transmission is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.
  • the base station 10, the terminal 20, the wireless relay device 30, and the like may function as computers that perform processing of the wireless communication method of the present disclosure.
  • FIG. 9 is a diagram illustrating an example of hardware configurations of the base station 10, terminal 20, and radio relay device 30 according to an embodiment of the present disclosure.
  • the base station 10, the terminal 20, and the wireless relay device 30 described above are physically computers including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. It may be configured as a device.
  • the term "apparatus” can be read as a circuit, device, unit, or the like.
  • the hardware configuration of the base station 10, the terminal 20, and the radio relay device 30 may be configured to include one or more of each device shown in the figure, or may be configured without some devices. good.
  • Each function of the base station 10, the terminal 20, and the radio relay device 30 is performed by the processor 1001 by loading predetermined software (program) onto hardware such as the processor 1001 and the storage device 1002, and the communication device 1004. It is realized by controlling communication via the storage device 1002 and controlling at least one of data reading and writing in the storage device 1002 and the auxiliary storage device 1003 .
  • the processor 1001 for example, operates an operating system and controls the entire computer.
  • the processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
  • CPU central processing unit
  • the control unit 140 , the control unit 240 and the like described above may be implemented by the processor 1001 .
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to them.
  • programs program codes
  • software modules software modules
  • data etc.
  • the program a program that causes a computer to execute at least part of the operations described in the above embodiments is used.
  • control unit 140 of base station 10 shown in FIG. 2 may be implemented by a control program stored in storage device 1002 and operated by processor 1001 .
  • FIG. Processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from a network via an electric communication line.
  • the storage device 1002 is a computer-readable recording medium, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. may be configured.
  • the storage device 1002 may also be called a register, cache, main memory (main storage device), or the like.
  • the storage device 1002 can store executable programs (program code), software modules, etc. for implementing the communication method according to an embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu -ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like.
  • the storage medium described above may be, for example, a database, server, or other suitable medium including at least one of storage device 1002 and secondary storage device 1003 .
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of, for example, frequency division duplex (FDD) and time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • the transceiver may be physically or logically separate implementations for the transmitter and receiver.
  • the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
  • the output device 1006 is an output device (for example, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • Each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
  • the base station 10, the terminal 20 and the radio relay device 30 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable le Gate Array ), etc., and part or all of each functional block may be realized by the hardware.
  • processor 1001 may be implemented using at least one of these pieces of hardware.
  • the radio relay device 30 may have a variable phase shifter, a phase shifter, an amplifier, an antenna, an array antenna, etc., as hardware constituting the variable section 340 and the antenna section 350, if necessary.
  • a vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029. , an information service unit 2012 and a communication module 2013 .
  • a communication device mounted on vehicle 2001 may be applied to communication module 2013, for example.
  • the driving unit 2002 is configured by, for example, an engine, a motor, or a hybrid of the engine and the motor.
  • the steering unit 2003 includes at least a steering wheel (also referred to as steering wheel), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
  • the electronic control unit 2010 is composed of a microprocessor 2031 , a memory (ROM, RAM) 2032 and a communication port (IO port) 2033 . Signals from various sensors 2021 to 2029 provided in the vehicle 2001 are input to the electronic control unit 2010 .
  • the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
  • the signals from the various sensors 2021 to 2029 include the current signal from the current sensor 2021 that senses the current of the motor, the rotation speed signal of the front and rear wheels acquired by the rotation speed sensor 2022, and the front wheel acquired by the air pressure sensor 2023. and rear wheel air pressure signal, vehicle speed signal obtained by vehicle speed sensor 2024, acceleration signal obtained by acceleration sensor 2025, accelerator pedal depression amount signal obtained by accelerator pedal sensor 2029, brake pedal sensor 2026 obtained by There are a brake pedal depression amount signal, a shift lever operation signal acquired by the shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028, and the like.
  • the information service unit 2012 includes various devices such as car navigation systems, audio systems, speakers, televisions, and radios for providing various types of information such as driving information, traffic information, and entertainment information, and one or more devices for controlling these devices. ECU.
  • the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide passengers of the vehicle 2001 with various multimedia information and multimedia services.
  • Driving support system unit 2030 includes millimeter wave radar, LiDAR (Light Detection and Ranging), camera, positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, automatic driving vehicle (AV) map, etc. ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, AI processors, etc., to prevent accidents and reduce the driver's driving load. and one or more ECUs for controlling these devices.
  • the driving support system unit 2030 transmits and receives various information via the communication module 2013, and realizes a driving support function or an automatic driving function.
  • the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via communication ports.
  • the communication module 2013 communicates with the vehicle 2001 through the communication port 2033, the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, the axle 2009, the electronic Data is transmitted and received between the microprocessor 2031 and memory (ROM, RAM) 2032 in the control unit 2010 and the sensors 2021-29.
  • the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from an external device via wireless communication.
  • Communication module 2013 may be internal or external to electronic control unit 2010 .
  • the external device may be, for example, a base station, a mobile station, or the like.
  • the communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication.
  • the communication module 2013 receives the rotation speed signal of the front and rear wheels obtained by the rotation speed sensor 2022, the air pressure signal of the front and rear wheels obtained by the air pressure sensor 2023, and the vehicle speed sensor. 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, and a shift lever.
  • a shift lever operation signal obtained by the sensor 2027 and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028 are also transmitted to an external device via wireless communication.
  • the communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices, and displays it on the information service unit 2012 provided in the vehicle 2001 .
  • Communication module 2013 also stores various information received from external devices in memory 2032 available to microprocessor 2031 .
  • the microprocessor 2031 controls the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, and the axle 2009 provided in the vehicle 2001.
  • sensors 2021 to 2029 and the like may be controlled.
  • the operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components.
  • the processing order may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described using functional block diagrams for convenience of explanation of processing, such devices may be implemented in hardware, software, or a combination thereof.
  • the software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are stored in random access memory (RAM), flash memory, read-only memory, respectively. (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other appropriate storage medium.
  • notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods.
  • notification of information includes physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
  • RRC signaling may also be called an RRC message, for example, RRC It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.
  • Each aspect/embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system) system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer, a decimal number)), FRA (Future Radio Access), NR (new Radio), New radio access ( NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802 .16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems, and any extensions, modifications, creations, and provisions based on these systems. It may be applied to
  • a specific operation performed by the base station 10 in this specification may be performed by its upper node in some cases.
  • various operations performed for communication with terminal 20 may be performed by base station 10 and other network nodes other than base station 10 ( (eg, but not limited to MME or S-GW).
  • base station 10 e.g, but not limited to MME or S-GW
  • other network nodes e.g, but not limited to MME or S-GW.
  • the other network node may be a combination of a plurality of other network nodes (eg, MME and S-GW).
  • Information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.
  • Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input/output information and the like can be overwritten, updated, or appended. The output information and the like may be deleted. The entered information and the like may be transmitted to another device.
  • the determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), may be performed by a boolean value (Boolean: true or false), or may be performed by comparing numerical values (e.g. , comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) to website, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
  • the channel and/or symbols may be signaling.
  • a signal may also be a message.
  • a component carrier may also be called a carrier frequency, a cell, a frequency carrier, or the like.
  • system and “network” used in this disclosure are used interchangeably.
  • information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information.
  • radio resources may be indexed.
  • base station BS
  • radio base station base station
  • base station fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • a base station can accommodate one or more (eg, three) cells.
  • the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (e.g., an indoor small base station (RRH:
  • RRH indoor small base station
  • the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems serving communication services in this coverage.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station is defined by those skilled in the art as subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
  • the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
  • at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
  • at least one of the base station and mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read as a user terminal.
  • communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.)
  • the terminal 20 may have the functions of the base station 10 described above.
  • words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
  • uplink channels, downlink channels, etc. may be read as side channels.
  • user terminals in the present disclosure may be read as base stations.
  • the base station may have the functions that the above-described user terminal has.
  • determining and “determining” used in this disclosure may encompass a wide variety of actions.
  • “Judgement” and “determination” are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure);
  • "judgment” and “determination” are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment” or “decision” has been made.
  • judgment and “decision” are considered to be “judgment” and “decision” by resolving, selecting, choosing, establishing, comparing, etc. can contain.
  • judgment and “decision” can include considering that some action is “judgment” and “decision”.
  • judgment (decision) may be read as “assuming”, “expecting”, “considering”, or the like.
  • connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being “connected” or “coupled.” Couplings or connections between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as "access”.
  • two elements are defined using at least one of one or more wires, cables, and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may also be called Pilot depending on the applicable standard.
  • RS Reference Signal
  • any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to a first and second element does not imply that only two elements can be employed or that the first element must precede the second element in any way.
  • a radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be of a fixed length of time (eg, 1 ms) independent of numerology.
  • a numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
  • a slot may consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain.
  • a slot may be a unit of time based on numerology.
  • a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
  • PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A.
  • PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.
  • one subframe may be called a Transmission Time Interval (TTI)
  • TTI Transmission Time Interval
  • TTI Transmission Time Interval
  • TTI Transmission Time Interval
  • one slot or one minislot may be called a TTI.
  • TTI Transmission Time Interval
  • at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum scheduling time unit in wireless communication.
  • the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each terminal 20) to each terminal 20 on a TTI basis.
  • radio resources frequency bandwidth, transmission power, etc. that can be used by each terminal 20
  • TTI is not limited to this.
  • a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
  • a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • the short TTI e.g., shortened TTI, etc.
  • a TTI having the above TTI length may be read instead.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the numerology, and may be 12, for example.
  • the number of subcarriers included in an RB may be determined based on numerology.
  • the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long.
  • One TTI, one subframe, etc. may each consist of one or more resource blocks.
  • One or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. may be called.
  • PRBs physical resource blocks
  • SCGs sub-carrier groups
  • REGs resource element groups
  • PRB pairs RB pairs, etc. may be called.
  • a resource block may be composed of one or more resource elements (RE: Resource Element).
  • RE Resource Element
  • 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • a bandwidth part (which may also be called a bandwidth part) may represent a subset of contiguous common resource blocks (RBs) for a certain numerology on a certain carrier.
  • the common RB may be identified by an RB index based on the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be configured for terminal 20 within one carrier.
  • At least one of the configured BWPs may be active, and terminal 20 may not expect to transmit or receive a given signal/channel outside the active BWP.
  • terminal 20 may not expect to transmit or receive a given signal/channel outside the active BWP.
  • “cell”, “carrier”, etc. in the present disclosure may be read as "BWP”.
  • radio frames, subframes, slots, minislots and symbols are only examples.
  • the number of subframes contained in a radio frame the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.
  • CP cyclic prefix
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean that "A and B are different from C”.
  • Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
  • notification of predetermined information is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.
  • base station 110 transmitting unit 120 receiving unit 130 setting unit 140 control unit 20 terminal 210 transmitting unit 220 receiving unit 230 setting unit 240 control unit 30 radio relay device 310 transmitting unit 320 receiving unit 330 control unit 340 variable unit 350 antenna unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Driving unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheel 2008 Rear wheel 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication Module 2021 Current sensor 2022 Revolution sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving support system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 communication port (IO port)

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