WO2024069897A1 - Dispositif de relais radio et procédé de communication - Google Patents

Dispositif de relais radio et procédé de communication Download PDF

Info

Publication number
WO2024069897A1
WO2024069897A1 PCT/JP2022/036589 JP2022036589W WO2024069897A1 WO 2024069897 A1 WO2024069897 A1 WO 2024069897A1 JP 2022036589 W JP2022036589 W JP 2022036589W WO 2024069897 A1 WO2024069897 A1 WO 2024069897A1
Authority
WO
WIPO (PCT)
Prior art keywords
ncr
fwd
base station
relay device
reception
Prior art date
Application number
PCT/JP2022/036589
Other languages
English (en)
Japanese (ja)
Inventor
大輔 栗田
浩樹 原田
ウェイチー スン
ジン ワン
ラン チン
Original Assignee
株式会社Ｎｔｔドコモ
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 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2022/036589 priority Critical patent/WO2024069897A1/fr
Publication of WO2024069897A1 publication Critical patent/WO2024069897A1/fr

Links

Images

Classifications

    • 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
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to a wireless relay device and a communication method in a wireless communication system.
  • 3GPP registered trademark
  • 3rd Generation Partnership Project 3rd Generation Partnership Project
  • 5G Fifth Generation Partnership Project
  • NR New Radio
  • 5G various wireless technologies and network architectures are being studied to meet the requirements of achieving a throughput of 10 Gbps or more while keeping latency in wireless sections to 1 ms or less (for example, Non-Patent Document 1).
  • Next-generation communications are expected to use high-frequency bands. Due to the characteristics of these high-frequency bands, there is a demand for improved communication quality due to the reduced number of scatterers, the reduced shadowing effect, and increased attenuation over distance. It is expected that beam control and an environment that guarantees communication quality will be required.
  • Non-Patent Document 2 For example, in high frequency bands, there is a problem that blind spots are easily created due to the strong directional nature of radio waves. Therefore, methods are being tried to improve communication quality in multipath environments by using passive repeaters or active reflectors (RIS: Reconfigurable Intelligent Surfaces), smart repeaters that receive, amplify, and re-radiate signals, etc. (for example, Non-Patent Document 2).
  • RIS Reconfigurable Intelligent Surfaces
  • smart repeaters that receive, amplify, and re-radiate signals, etc.
  • wireless relay devices such as reflectors or smart repeaters that relay radio waves by reflecting or transmitting radio waves from a radio wave source such as a base station to a radio wave receiving destination such as a terminal are being considered.
  • a wireless relay device controlled by a network relays wireless signals between base stations and terminals.
  • the present invention has been made in consideration of the above points, and aims to relay wireless signals in a wireless communication system using a wireless relay device controlled by a network.
  • a wireless relay device having a communication unit that transmits and receives control information via a first link used for exchanging control information between a base station and the wireless relay device, and a control unit that determines a first time resource and a first downlink receiving beam/uplink transmitting beam assigned to the wireless relay device in the first link based on the control information, and determines a second time resource and a second downlink receiving beam/uplink transmitting beam assigned to the wireless relay device in a second link between the base station and the wireless relay device used for transferring signals between the base station and a terminal, and the control unit determines whether to cause the first downlink receiving beam/uplink transmitting beam to follow the second downlink receiving beam/uplink transmitting beam based on the relationship between the first time resource and the second time resource.
  • the disclosed technology allows wireless signals to be relayed in a wireless communication system by a wireless relay device controlled by a network.
  • FIG. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a wireless relay device 30 according to an embodiment of the present invention.
  • 5 is a diagram illustrating an example of operation of the wireless relay device 30 according to the embodiment of the present invention.
  • FIG. 1 is a diagram illustrating an example of communication in a high frequency band.
  • 1 is a diagram illustrating an example of a reflective wireless relay device 30 according to an embodiment of the present invention.
  • FIG. 1 is a diagram illustrating an example of a transparent wireless relay device 30 according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a network-controlled repeater according to an embodiment of the present invention.
  • a figure to explain an example (2) of a beam used for an access link in an embodiment of the present invention A figure to explain an example (3) of a beam used for an access link in an embodiment of the present invention.
  • a figure to explain an example (7) of a beam used for an access link in an embodiment of the present invention A figure for explaining an example of a method for determining a beam (TCI state) to be used for a backhaul link in an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station 10, a terminal 20, or a wireless relay device 30 according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing an example of the configuration of a vehicle 2001 according to an embodiment of the present invention.
  • LTE Long Term Evolution
  • NR NR
  • 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
  • NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc.
  • NR- even if a signal is used in NR, it is not necessarily specified as "NR-".
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., Flexible Duplex, etc.).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • another method e.g., Flexible Duplex, etc.
  • radio parameters and the like when radio parameters and the like are “configured,” this may mean that predetermined values are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are configured.
  • FIG. 1 is a diagram for explaining a wireless communication system in an embodiment of the present invention.
  • the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20. There may be multiple base stations 10 and multiple terminals 20.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of the wireless signal are defined in the time domain and the frequency domain, and 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.
  • the TTI Transmission Time Interval
  • the time domain may be a slot or a subslot
  • the TTI may be a subframe.
  • the base station 10 is capable of performing carrier aggregation, which bundles multiple cells (multiple CCs (component carriers)) together to communicate with the terminal 20.
  • 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.
  • the synchronization signal is, for example, NR-PSS and NR-SSS.
  • the system information is, for example, transmitted 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 signals such as PUCCH and PDCCH
  • shared channels such as PUSCH and PDSCH
  • data are merely examples.
  • the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 in DL and transmits control signals or data to the base station 10 in UL, thereby utilizing various communication services provided by the wireless communication system.
  • the terminal 20 may be referred to as a UE, and the base station 10 may be referred to as a gNB.
  • the terminal 20 is capable of performing carrier aggregation, which bundles multiple cells (multiple CCs) together to communicate with the base station 10.
  • carrier aggregation one primary cell and one or more secondary cells are used.
  • a PUCCH-SCell having a PUCCH may also be used.
  • the base station 10 is, for example, a wireless base station operated in 5G or 6G and forms a cell.
  • the cell is a relatively large cell and is called a macro cell.
  • Base station 10A to base station 10D are base stations operated in 5G or 6G.
  • Base station 10A to base station 10D form cells CA to D, respectively, which are smaller in size than a macro cell.
  • Cells A to D may be called small cells, macro cells, etc. As shown in FIG. 1, cells A to D may be formed to be included in a macro cell.
  • a macrocell may generally be interpreted as a communication area with a radius of several hundred meters to several tens of kilometers that is covered by a single base station.
  • a small cell may also be interpreted as a general term for a cell that has low transmission power and covers a smaller area than a macrocell.
  • the base station 10 and base stations 0A to 10D may be written as gNodeB (gNB) or BS (Base Station), etc.
  • the terminal 20 may be written as UE or MS, etc.
  • the specific configuration of the wireless communication system, including the number and types of base stations and terminals, is not limited to the example shown in FIG. 1.
  • the wireless communication system is not necessarily limited to a wireless communication system conforming to 5G or 6G.
  • the wireless communication system may be a next-generation wireless communication system conforming to 6G or a wireless communication system conforming to LTE.
  • the base station 10 and base stations 10A-10D perform wireless communication with the terminal 20 according to 5G or 6G.
  • the base station 10 and base stations 10A-10D and the terminal 20 may support Massive MIMO, which generates a more directional beam by controlling wireless signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which uses a bundle of multiple component carriers (CCs), Dual Connectivity (DC), which simultaneously communicates between the terminal 20 and each of two NG-RAN nodes, and IAB (Integrated Access and Backhaul), which integrates wireless backhaul between wireless communication nodes such as gNBs and wireless access to the terminal 20.
  • Massive MIMO which generates a more directional beam by controlling wireless signals transmitted from multiple antenna elements
  • CA Carrier Aggregation
  • DC Dual Connectivity
  • IAB Integrated Access and Backhaul
  • the wireless communication system may also be compatible with higher frequency bands than the following frequency ranges (Frequency Range, FR) defined in 3GPP Release 15.
  • FR1 may be compatible with 410 MHz-7.125 GHz
  • FR2 may be compatible with 24.25 GHz-52.6 GHz.
  • the wireless communication system may be compatible with frequency bands exceeding 52.6 GHz up to 114.25 GHz. Such frequency bands may be referred to as millimeter wave bands.
  • the base station 10 that supports massive MIMO can transmit beams.
  • Massive MIMO generally means MIMO communication using an antenna with 100 or more antenna elements, and the multiplexing effect of multiple streams enables faster wireless communication than before.
  • Advanced beamforming is also possible.
  • the beam width can be dynamically changed depending on the frequency band used or the state of the terminal 20.
  • the use of narrow beams can increase the received signal power due to the beamforming gain.
  • effects such as reduced interference and effective use of wireless resources are expected.
  • the wireless communication system may also include a wireless relay device 30.
  • the wireless relay device 30 may be a reflector (RIS), a phase control reflector, a passive repeater, an IRS (Intelligent Reflecting Surface), etc.
  • RIS Reconfigurable Intelligent Surface
  • Specific examples of a reflector may include what is called a metamaterial reflector, a dynamic metasurface, a metasurface lens, etc. (e.g., Non-Patent Document 2).
  • the wireless relay device 30 relays, for example, a wireless signal transmitted from the base station 10A.
  • “relay” may refer to at least one of “reflection,” “transmission,” “concentration (concentrating radio waves at approximately one point),” and “diffraction.”
  • the terminal 20 can receive the wireless signal relayed by the wireless relay device 30.
  • the wireless relay device 30 may relay a wireless signal transmitted from the terminal 20, or may relay a wireless signal transmitted from the base station 10.
  • the wireless relay device 30 can change the phase of the wireless signal that is relayed to the terminal 20.
  • the wireless relay device 30 may be called a phase-variable reflector.
  • the wireless relay device 30 may have a function of changing the phase of the wireless signal and relaying it, but is not limited to this.
  • the wireless relay device 30 may also be called a repeater, relay device, reflect array, IRS, transmit array, or the like.
  • a wireless relay device 30 such as a RIS may be called a battery-less device, a metamaterial functional device, an intelligent reflecting surface, a smart repeater, etc.
  • a wireless relay device 30 such as a RIS or a smart repeater may be defined as having the functions shown in 1)-5) below.
  • the signals may have a receiving function for signals transmitted from the base station 10.
  • the signals may be DL signals such as SSB (SS/PBCH block), PDCCH, PDSCH, DM-RS (Demodulation Reference Signal), PT-RS (Phase Tracking Reference Signal), CSI-RS (Channel State Information Reference Signal), RIS-only signals, etc. It may have a receiving function for signals carrying information related to metamaterial functions. It may also have a transmitting function for transmitting the signals to the terminal 20.
  • SSB may be a signal including a synchronization signal and notification information.
  • the signals may be UL signals such as PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS (Sounding Reference Signal), RIS-only signals, etc. It may have a function of transmitting information related to metamaterial functions. It may also have a receiving function of receiving the signals from the terminal 20.
  • It may have a frame synchronization function with the base station 10. It may also have a frame synchronization function with the terminal 20.
  • the reflection function may be a function related to phase change, a function related to beam control (e.g., a function related to control of the TCI (Transmission Configuration Indication) state, QCL (Quasi Co Location), selective application of a beam, and selective application of a spatial filter/precoding weight).
  • a function related to phase change e.g., a function related to transmission Configuration Indication
  • QCL Quadasi Co Location
  • the TCI state is information related to the QCL of a signal/channel, and may also be called spatial reception parameters, spatial relation information, etc.
  • the TCI state may be set in the wireless relay device 30 and the terminal 20 for each channel or signal.
  • QCL is an index that indicates the statistical properties of a signal/channel. For example, if a signal/channel has a QCL relationship with another signal/channel, it may mean that it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameters (e.g., spatial Rx parameters) are identical between these different signals/channels (i.e., QCL with respect to at least one of these).
  • the base station 10 or the terminal 20 may have a power change function for a signal transmitted from the base station 10 or the terminal 20.
  • the power change function may be power amplification.
  • a wireless relay device 30 such as a RIS or smart repeater may mean that up to function A below is performed, but transmission is performed without performing function B below.
  • Function A A phase shifter is applied.
  • Function B A compensation circuit (e.g., amplification, filter) is not used.
  • function A apply a phase shifter and compensation circuit.
  • Function B do not use frequency conversion.
  • a wireless relay device 30 when the phase is changed, the amplitude may be amplified.
  • "relaying" in a wireless relay device 30 such as a RIS may mean transmitting a received signal as is without performing processing at the layer 2 or layer 3 level, transmitting a received signal at the physical layer level as is, or transmitting a received signal as is without interpreting the signal (in which case, a phase change or amplitude amplification, etc. may be performed).
  • the base station 10, the terminal 20, and the wireless relay device 30 each include a function to execute the embodiments described below. However, the base station 10, the terminal 20, and the wireless relay device 30 may each include only one of the functions of the embodiments.
  • Fig. 2 is a diagram showing an example of the functional configuration of the base station 10.
  • the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in Fig. 2 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any.
  • the transmitting unit 110 and the receiving unit 120 may be called a communication unit.
  • the transmitting unit 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly.
  • the receiving unit 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals.
  • the transmitting unit 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DL data, etc. to the terminal 20.
  • the transmitting unit 110 also transmits setting information, etc., which will 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 a storage device, and reads it out from the storage device as necessary.
  • the control unit 140 performs, for example, resource allocation and overall control of the base station 10. Note that the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.
  • the transmitting unit 110 and the receiving unit 120 may be called the transmitter and the receiver, respectively.
  • Fig. 3 is a diagram showing an example of the functional configuration of the terminal 20.
  • the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in Fig. 3 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and functional units may be any.
  • the transmitting unit 210 and the receiving unit 220 may be called a communication unit.
  • the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
  • the receiver 220 receives various signals wirelessly and obtains higher layer signals from the received physical layer signals.
  • the transmitter 210 also transmits HARQ-ACK, and the receiver 220 receives setting information etc., which will be explained in the embodiment.
  • the setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device, and reads it out from the storage device as necessary.
  • the setting unit 230 also stores setting information that is set in advance.
  • the control unit 240 performs control of the entire terminal 20, etc. Note that the functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.
  • the transmitting unit 210 and the receiving unit 220 may also be called a transmitter and a receiver, respectively.
  • Fig. 4 is a diagram showing an example of a functional configuration of the wireless relay device 30 according to the embodiment of the present invention.
  • the wireless relay device 30 has a transmitting unit 310, a receiving unit 320, a control unit 330, a variable unit 340, and an antenna unit 350.
  • the functional divisions and the names of the functional units may be any.
  • 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 specifically referred to as a relay antenna.
  • the variable section 340 and the antenna section 350 may be referred to as a relay section.
  • the variable section 340 is connected to the antenna section 350 and can change the phase, load, amplitude, etc.
  • the variable section 340 may be a variable phase shifter, phase shifter, amplifier, etc.
  • the phase of the radio waves that reach the relay antenna from the radio wave generating source it is possible to change the direction or beam of the radio waves, etc.
  • the control unit 330 is a control means for controlling the variable unit 340.
  • the control unit 330 functions as a control unit for controlling 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, or may change the relay state based on the reception state of the radio waves from the base station 10 or the terminal 20.
  • the control unit 330 may select appropriate reception beams and transmission beams (directions) based on control information such as SSB, and control the variable unit 340.
  • the control unit 330 may select an appropriate combination of reception direction and transmission direction based on criteria such as the highest reception quality or the highest received power from the reception state, and control the variable unit 340.
  • the control unit 330 can control the variable unit 340 based on, 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 same applies below).
  • the control unit 330 can relay the radio wave received from the base station 10A to a specific direction such as the radio wave receiving destination (terminal 20 in this case) by changing the phase without using transmission power using a known method such as an active repeater or RIS.
  • the control unit 330 controls the phase of the radio signal to be relayed to the terminal 20 or the base station 10A based on the estimated propagation path information H PT and H RP .
  • the radio relay device 30 controls (changes) only the phase of the radio signal (radio wave) by the control unit 330, and may relay without power supply without amplifying the power of the relayed radio signal.
  • control unit 330 may acquire information based on the reception state. Furthermore, 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 the various signals exemplified in the above-mentioned functions) transmitted from the base station 10A or the terminal 20 as control information.
  • SSB including the various signals exemplified in the above-mentioned functions
  • control unit 330 may estimate propagation path information (H PT and H RP ) between the radio wave source (e.g., the base station 10A or the terminal 20) and the antenna unit 350 based on the reception state (e.g., change in reception power , etc. ) during control by the variable unit 340.
  • H PT and H RP propagation path information
  • the propagation path information (propagation channel information) for each propagation path is specifically information such as amplitude or phase, and in an embodiment of the present invention, is information estimated regarding the propagation path of the radio waves arriving at the antenna unit 350.
  • the control unit 330 may estimate the propagation path information of the antenna unit 350 based on the change in received power when the phase of the variable unit 340 of the array-shaped antenna unit 350 is switched to orthogonal, using a principle similar to that of I/Q (In-phase/Quadrature) detection.
  • FIG. 5 is a diagram showing an example of the operation of the wireless relay device 30 in an embodiment of the present invention.
  • the wireless relay device 30 is interposed between the base station 10A (or another base station 10, etc.) and the terminal 20, and relays (reflects, transmits, aggregates, diffracts, etc.) wireless signals transmitted and received between the base station 10A and the terminal 20.
  • the base station 10A and the terminal 20 transmit and receive wireless signals directly without going through the wireless relay device 30.
  • the wireless relay device 30 relays the wireless signals transmitted and received between the base station 10A and the terminal 20.
  • the wireless relay device 30 estimates propagation path information H PT , H RT between the radio wave generating source such as the base station 10A or the terminal 20 and the relay antenna based on a change in the received power when controlling the variable unit 340 such as a variable phase shifter, and relays the radio signal to the radio wave receiving destination such as the terminal 20 by controlling the variable unit 340 such as a variable phase shifter based on the estimated propagation path information.
  • the wireless relay device 30 is not limited to estimating the propagation path information H PT , H RT , and may relay the radio signal to the radio wave receiving destination such as the base station 10A or the terminal 20 by controlling the variable unit 340 such as a variable phase shifter based on control information received from the base station 10A or the terminal 20.
  • a propagation path or propagation channel refers to an individual communication path for wireless communication, and in this case, it is the communication path between each transmitting and receiving antenna (such as the base station antenna and terminal antenna in the figure).
  • the wireless relay device 30 includes an antenna unit 350 having a small multi-element antenna compatible with massive MIMO, and a variable unit 340 having a variable phase device or phase shifter that changes the phase of the wireless signal, essentially the radio wave, to a specific phase, and uses the variable unit 340 to control the phase of the radio wave relayed to the terminal 20 or base station 10A.
  • FIG. 6 is a diagram showing an example of communication in a high frequency band.
  • a high frequency band of several GHz to several tens of GHz or more blind zones are likely to occur due to the strong linearity of radio waves. If there is line of sight between the base station 10A and the terminal 20, there is no effect on wireless communication between the base station 10A and the terminal 20 even when the high frequency band is used. On the other hand, if the line of sight between the base station 10A and the terminal 20 is blocked by an obstruction such as a building or tree, for example, the wireless quality will deteriorate significantly. In other words, if the terminal 20 moves into a blind zone blocked by an obstruction, communication may be interrupted.
  • Radio wave propagation control devices are of two types: passive and active.
  • Passive types have the advantage of not needing control information, but are unable to keep up with moving objects or environmental changes.
  • active types have the disadvantage of needing control information and increasing overhead, but they can variably control the propagation characteristics of radio waves by changing the load (phase) state of the control antenna, and can keep up with moving objects and environmental changes.
  • FB feedback
  • propagation path information model a variable radio wave propagation control device randomly changes the load (phase) state and has the terminal 20 or the like feed back the communication state, and searches for optimal conditions.
  • the propagation path information model the load state is determined based on propagation path information between the base station and the radio wave propagation control device, making it possible to perform optimal radio wave propagation control. Either type can be applied in the embodiments of the present invention.
  • relay methods such as reflection, transmission, diffraction, and aggregation.
  • the following describes the configuration of the reflection type and the transmission type (for the diffraction type and the aggregation type, see Non-Patent Document 2, etc.).
  • FIG. 7 is a diagram showing an example of a reflective wireless relay device 30 in an embodiment of the present invention.
  • An example of the system configuration of a reflective wireless relay device 30 will be described with reference to FIG. 7.
  • FIG. 7 is a diagram showing the relationship between a transmitting antenna Tx of a base station 10A or the like, a relay antenna Sx of a transparent wireless relay device 30, and a receiving antenna Rx of a terminal 20 or the like.
  • MIMO is used as an example, and there are multiple propagation paths between Tx and Sx and multiple propagation paths between Sx and Rx, and the wireless relay device 30 relays radio waves by controlling a variable unit 340 having a variable phase shifter or the like of the relay antenna Sx.
  • the array-like relay antennas are arranged facing the same direction. This makes it possible to estimate the propagation path of the relay antennas based on the reception state observed when the phase conditions of the relay antennas are changed multiple times.
  • FIG. 8 is a diagram showing an example of a transparent type wireless relay device 30 in an embodiment of the present invention.
  • An example of the system configuration of the transparent type wireless relay device 30 will be described with reference to FIG. 8.
  • FIG. 8 is a diagram showing the relationship between the transmitting antenna Tx of the base station 10A, the relay antenna Sx of the transparent type wireless relay device 30, and the receiving antenna Rx of the terminal 20.
  • MIMO is used as an example, and there are multiple propagation paths between Tx and Sx and multiple propagation paths between Sx and Rx.
  • the wireless relay device 30 relays radio waves arriving from one side to the other side via a variable unit 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 arranged in pairs facing in opposite directions so that radio waves arriving from one side can be relayed to the other side.
  • the power that has arrived at the relay antenna may be detected by a power detector or the like to measure the reception state.
  • the propagation path of the relay antenna can be estimated based on the received signal observed when the phase conditions of the relay antenna are changed multiple times.
  • Future networks such as 6G will require even higher quality than 5G. For example, ultra-high speeds on the order of tera bps and high reliability and low latency at the level of optical communications will be required.
  • designs will need to take into account ultra-extended coverage, ultra-long distance communications, ultra-reliable communications, virtual cells, flexible networks, mesh networks, enhanced side links, and RIS or smart repeaters.
  • the RIS reflects or transmits the beam transmitted from the base station 10 or terminal 20 in a predetermined direction and delivers it to the terminal 20 or base station 10.
  • a passive RIS is a device that does not change control of reflection angle or beam width, etc. according to the position of the mobile station, and does not require control information, but precise beam control is difficult.
  • An active RIS is a device that changes control of reflection angle and beam width, etc. according to the position of the mobile station, and allows precise beam control, but requires control information, which increases overhead.
  • a RIS can increase the number of transmission points for communication.
  • the RIS may be any of the names shown in 1)-5) below, but is not limited to these.
  • the RIS may be any device having a specific function, and the specific function may be, for example, at least one of the functions 1) and 2) shown below.
  • UE Function Receiving function of signals transmitted from the base station 10 (e.g., DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, RIS-dedicated signals).
  • the receiving function may receive information related to the metamaterial function described below in 2).
  • the transmitting function may transmit information related to the metamaterial function described below in 2).
  • Metamaterial Function A function for reflecting a signal transmitted from the base station 10 or the terminal 20 (e.g., phase change). The signal may be reflected by changing the phase for each of the multiple reflecting elements possessed by the RIS, or a common phase change may be performed by multiple reflecting elements to reflect the signal.
  • a function related to beam control e.g., TCI state, function related to QCL control, selective application of beam, selective application of spatial filter/precoding weight).
  • a function for changing the power of a signal transmitted from the base station 10 or the terminal 20 e.g., power amplification). A different power change may be performed for each of the reflecting elements possessed by the RIS, or a common power change may be performed by multiple reflecting elements.
  • RIS may mean reflecting radio waves/signals.
  • base station and “terminal” are used, but are not limited to these and may be replaced with communication devices.
  • RIS may be replaced with smart repeater, relay, etc.
  • the RIS may operate under the assumptions set forth below in 1)-6). 1) The network operator configures the RIS. 2) The RIS is fixed and does not move. 3) The RIS relays signals from only one base station. 4) It can receive and transmit control signals. 5) It operates in half-duplex mode. 6) In a single RIS environment.
  • a network-controlled repeater which is a wireless relay device controlled by a network
  • a network-controlled repeater can control, for example, the beam, timing, DL or UL, ON or OFF, and transmission power from the network.
  • the "network-controlled repeater” will also be referred to as “repeater.”
  • the network-controlled repeater is used as an in-band RF repeater to extend coverage in the FR1 and FR2 bands. In particular, it is intended for use in FR2 deployments in outdoor and outdoor to indoor (O2I) scenarios.
  • the environment of the network-controlled repeater may be a single-hop, non-mobile environment.
  • the network-controlled repeater may also be transparent to the UE.
  • the network-controlled repeater can simultaneously maintain a gNB-repeater link and a repeater-UE link.
  • FIG. 9 is a diagram showing an example of a network-controlled repeater in an embodiment of the present invention.
  • a network-controlled repeater may be configured as shown in FIG. 9.
  • the network-controlled repeater is also referred to as NCR.
  • An NCR-MT Mobile Termination
  • C-link control link
  • the control link may be based on an NR-Uu interface.
  • NCR-Fwd (Forwarding) may be defined as a device having the function of amplifying and forwarding UL and DL RF signals between the base station 10 and the terminal 20 via a backhaul link and an access link.
  • the operation of the NCR-Fwd may be controlled based on side control information received from the base station 10.
  • the backhaul link corresponds to communication between the base station 10 and the NCR-Fwd
  • the access link corresponds to communication between the terminal 20 and the NCR-Fwd.
  • beam-related information may be recommended in side control information to control the operation of NCR30 at least in the access link.
  • the beam to be applied to the access link may be notified by a beam index or may be notified by the index of the source RS (e.g., an indicator such as TCI).
  • the beam used by the NCR-Fwd for the backhaul link may assume the same TCI state as the NCR-MT for the control link.
  • (1) Method of setting UL receiving beam of access link of NCR-Fwd Multiple consecutive gNB transmission beam IDs may be notified. - One gNB transmission beam ID may be notified and the same beam ID may be set consecutively. - Multiple consecutive gNB transmission beam IDs may be set periodically. - One gNB transmission beam ID may be notified and the same beam ID may be set consecutively and periodically. -
  • the TCI status of DCI 0_x may be referenced (the repeater needs to decode the DCI for the UE)
  • the TCI state of the configuration/activation of CG-PUSCH may be used, or may be specified for repeaters.
  • the TCI state of 3GPP Release 17 may be used.
  • Method of setting a beam for the access link of NCR-Fwd - A candidate beam for the access link of NCR-Fwd may be set, and the beam to be finally used may be set from the candidate beam - A candidate beam for the access link of NCR_Fwd may be set first, and then some of the candidate beams may be set - NCR may report candidate beams, and the beam to be used may be set from the reported candidate beams - NCR may report candidate beams, and some of the candidate beams may be set from the reported candidate beams - NCR may report candidate beams, and a candidate beam may be set first from the reported candidate beams, and then some of the candidate beams may be set
  • the UL receiving beam transmitted by NCR30 may be set as follows:
  • the NCR 30 may consider at least one of the following options as a method for setting the UL receiving beam for each time unit:
  • FIG. 10 is a diagram for explaining an example (1) of a UL receiving beam in an embodiment of the present invention.
  • the NCR 30 may assume that a sequence of UL receive beam IDs is specified and applied to the sequence of time units, with each beam ID being applied to each time unit.
  • the NCR 30 may assume that a sequence of time units is indicated as a number of consecutive time units by indicating a starting time unit and a length of the time unit.
  • start time or length of time may be predefined.
  • NCR 30 may expect to start at a predefined offset from receipt of the beam instruction, or a predefined length of time units.
  • NCR 30 may also expect the sequence of time units to be indicated as a sequence of time unit IDs.
  • FIG. 11 is a diagram for explaining an example (2) of a UL receiving beam in an embodiment of the present invention.
  • NCR30 may assume that one UL receive beam ID is specified and applies to a sequence of time units. NCR30 may assume that the sequence of time units is indicated as a number of consecutive time units by indicating the start time unit and the length of the time unit.
  • start time or length of time may be predefined.
  • NCR 30 may assume that the start time or length of time will be predefined offset from receipt of a beam instruction or a predefined length of time units will be applied starting from or until a new beam instruction.
  • NCR 30 may also assume that the sequence of time units is indicated as a sequence of time unit IDs.
  • FIG. 12 is a diagram for explaining an example (3) of a UL receiving beam in an embodiment of the present invention.
  • NCR 30 may assume that a periodic pattern is indicated. NCR 30 may assume that a period and offset are indicated. NCR 30 may also assume that a sequence of UL receive beam IDs is indicated with each beam ID applied to each periodic time unit.
  • FIG. 13 is a diagram for explaining an example (4) of a UL receiving beam in an embodiment of the present invention.
  • NCR 30 may assume that a periodic pattern is indicated. NCR 30 may assume that a period and offset are indicated. NCR 30 may also assume that a single UL receive beam ID is indicated and applied to a periodic series of time units.
  • NCR30 may assume that a sequence of time units is represented as a number of consecutive time units by being represented as a starting time unit and a length of the time unit.
  • NCR 30 may also assume that the start time or length of time is predefined. For example, NCR 30 may start applying the UL receive beam from a predefined offset from receiving the beam instruction, or a predefined length of time units. NCR 30 may also assume that the sequence of time units is indicated as a sequence of time unit IDs.
  • FIG. 14 is a diagram for explaining an example (5) of a UL receiving beam in an embodiment of the present invention.
  • the NCR 30 may assume that a beam may be specified as in FIG. 14, for example, in addition to the beam specified in FIG. 13.
  • the NCR 30 may assume that the PUSCH scheduling DCI is reused (DCI format 0_X).
  • the SRI field or a new field of the PUSCH scheduling DCI may be a field indicating the UL receiving beam ID.
  • NCR30 may assume that the indicated UL receiving beam ID and corresponding UL receiving beam are applied to the slot/symbol indicated in the time domain resource allocation field of the PUSCH scheduling DCI (DCI format 0_X).
  • the base station 10 may instruct the NCR 30 to forward only the UL signal from the terminal 20.
  • the base station 10 and the NCR 30 may assume that the PUSCH will not be transmitted on the resources instructed by the DCI in the following manner.
  • the NCR 30 may transfer only UL signals from the terminal 20 to the base station 10 in the slots/symbols indicated in the DCI. That is, the NCR 30 may not transmit a PUSCH in the resources indicated in the DCI.
  • NCR 30 transfers only UL signals from terminal 20 to base station 10 in the slot/symbol specified in the DCI, and does not need to transmit PUSCH in the resources specified in the DCI to NCR 30.
  • the new DCI format may include, for example, a field similar to the SRI field of the PUSCH scheduling DCI (DCI0_X) indicating the UL receiving beam ID.
  • the new DCI format includes a field similar to the time domain allocation field of, for example, the PUSCH scheduling DCI (DCI0_X), which indicates the applicability time (slot offset, symbol position within the slot) of the specified UL receive beam ID.
  • DCI0_X the PUSCH scheduling DCI
  • the NCR 30 may assume that CG (Configured Grant) settings/activation are reused.
  • the SRI field or a new field in the CG configuration (RRC) or CG activation DCI indicates the UL receive beam ID.
  • the NCR 30 may assume that the indicated UL receive beam ID and corresponding UL receive beam apply to the slot/symbol indicated by the CG configuration (RRC) and CG activation DCI.
  • NCR 30 only needs to amplify and forward UL signals from terminal 20 to base station 10 for one or more conventional fields (or new fields) when receiving CG configuration/activation. If CG configuration or CG activation DCI is set to a predefined value, NCR 30 only needs to forward UL signals from terminal 20 to base station 10 in the slots/symbols set by CG configuration (RRC) and CG activation DCI, and does not need to transmit PUSCH on the resource.
  • RRC CG configuration
  • NCR30 may also assume that new RRC configuration and activation DCI similar to CG configuration/activation will be introduced.
  • the new RRC configuration or DCI may include a field indicating the UL receiving beam ID.
  • the new RRC configuration or DCI may include a field indicating the applicability time (period, slot offset, symbol position within the slot) of the specified UL receive beam ID.
  • the NCR 30 may assume that the integrated TCI status indication DCI of 3GPP Release 17 is reused.
  • the TCI status field of the integrated TCI status indication of 3GPP Release 17 or a new field DCI may indicate the UL reception beam ID.
  • NCR30 may assume that the indicated UL receiving beam ID and corresponding UL receiving beam are applied starting from the first symbol/slot that is at least X slots/symbols after the last slot/symbol of the PUCCH carrying the HARQ-ACK of the DCI.
  • NCR30 may also start application from the first symbol/slot that is at least X slots/symbols after the slot/symbol in which the DCI was received.
  • NCR 30 may also envisage that new DCI formats are introduced.
  • the new DCI format may include, for example, a field similar to the TCI status field of the Release 17 unified TCI status indication DCI indicating the UL receive beam ID.
  • the application time of the beam indication in this case may be the same as described above.
  • the time unit may be a slot, a symbol, a slot group, a symbol group, a subslot, etc.
  • NCR 30 may assume that which one or more options apply is configured. NCR 30 may assume that the one or more supported options are reported as capability information of NCR 30. Each option may be defined as a mandatory or optional feature.
  • multiple UL receiving beam IDs may be indicated on a time basis. Also, in the above-mentioned options, multiple UL receiving beam IDs may be indicated for multiple frequency domain resource units on a time basis.
  • the above-described operation allows the NCR 30 to appropriately set the UL receiving beam in the access link.
  • the UL reception beam refers to the beam that the NCR-Fwd uses for the access link and is used to receive signals from the UE 20.
  • the UL reception beam that the NCR-Fwd uses may be notified, for example, by the methods shown in 1)-4) below.
  • the beam index may directly refer to the spatial domain filter of the NCR-Fwd used for UL reception in the access link. Different beam indices may refer to different spatial domain filters.
  • the source RS for UL reception of the source RS index NCR-Fwd may be newly defined as a resource type.
  • the source RS for UL reception of each NCR-Fwd may be placed in a predetermined time resource notified to the base station 10.
  • the NCR 30 amplifies and transfers the UL signal between the terminal 20 and the base station 10.
  • the NCR-Fwd may apply or use the same spatial domain filter to the UL reception of the access link in that unit of time and to the UL reception at the notified source RS for UL reception of the NCR-Fwd.
  • the definition of the source RS for UL reception of the NCR-Fwd will be described in detail later.
  • the TCI status of the NCR-Fwd may be associated with the source RS for UL reception of the NCR-Fwd in 2) above.
  • the NCR-Fwd may apply or use the same spatial domain filter for UL reception of the access link in that time unit and for UL reception at the source RS for UL reception of the NCR-Fwd associated with the notified TCI status of the NCR-Fwd.
  • Index of the beam of the base station 10 (e.g., CSI-RS or SSB index, or index of the TCI state to which the CSI-RS or SSB of the base station 10 is associated).
  • the UL reception beam or spatial domain filter of the NCR-Fwd may be associated with the beam of the base station 10.
  • the NCR-Fwd may apply or use the beam or spatial domain filter associated with the beam of the base station 10 for UL reception of the access link in that unit of time.
  • the "source RS for UL reception of NCR-Fwd” may be a newly defined type of resource used for beam management of NCR 30.
  • Each "source RS for UL reception of NCR-Fwd” is a set of time domain resources.
  • NCR 30 may amplify and forward the UL signal from terminal 20 to base station 10.
  • Each "source RS for UL reception of NCR-Fwd” may occupy multiple adjacent symbols.
  • the supported candidate numbers for adjacent symbols may be predefined, e.g., selected from ⁇ 1, 2, 4, 8, 10, 12, 14 ⁇ .
  • NCR30 may assume that multiple "source RSs for UL reception of NCR-Fwd" are configured.
  • the maximum number of resources supported may be predefined or may be subject to the capability information of NCR30.
  • NCR30 may assume that a source RS set for UL reception of the NCR-Fwd is configured. Each resource set may consist of multiple source RSs for UL reception of the NCR-Fwd. The maximum number of supported resource sets may be predefined or may be subject to the capability information of NCR30.
  • the maximum number of resources supported in a resource set may be predefined or may be subject to NCR30's capability information.
  • the NCR 30 may assume that the following parameters are set for each source RS for UL reception of the NCR-Fwd set by the side control information (RRC/MAC-CE/DCI).
  • Periodicity of resource/resource set for P/SP resources/resource sets).
  • the slot-level offset of the resource/resource set The symbol position of the resource within the slot (including the starting symbol and number of symbols) Uplink transmit beam for each resource
  • the NCR 30 may assume that in the case of semi-static resources/resource sets, it is activated/deactivated by side control information (RRC/MAC-CE/DCI).
  • the NCR 30 may use the uplink transmission beam indicated by the resource to forward UL signals from the terminal 20 to the base station 10 if it is activated, or not if it is deactivated.
  • the NCR 30 may assume that in the case of aperiodic resources/resource sets, the resources/resource sets are triggered by side control information (RRC/MAC-CE/DCI). When triggered, the NCR 30 may transfer UL signals from the terminal 20 to the base station 10 using the uplink transmission beam indicated by the resources.
  • RRC/MAC-CE/DCI side control information
  • NCR30 may assume that a resource ID/resource set ID is included in the side control information. Alternatively, NCR30 may assume that a trigger state is included in the side control information. NCR30 may assume that a trigger state is set for each resource/resource set.
  • NCR30 may assume that the slot offset, symbol position of the resource within the slot (including the starting symbol and number of symbols) are indicated by the control information on the trigger side.
  • the UL reception beam can be controlled based on the source RS for UL reception of the NCR-Fwd of NCR30.
  • the above operation 1 may be applied only if the above capability is supported by the NCR 30 and the base station 10 has enabled the feature.
  • the beam of the NCR-Fwd in the access link may be notified by the beam index or the index of the source RS. It is necessary to determine how to configure the candidate set of the beam of the NCR-Fwd in the access link.
  • the beam of the NCR-Fwd in the access link may be notified from a candidate set of beams.
  • the candidate set of DL transmission beams of the NCR-Fwd in the access link and the candidate set of UL reception beams of the NCR-Fwd in the access link may be common or may be separate.
  • the DL transmission beam of the NCR-Fwd in the access link and the UL reception beam of the NCR-Fwd in the access link may operate as shown in A)-E).
  • a set of candidate beams may be notified via RRC signaling (hereinafter, RRC signaling is also referred to as RRC), MAC-CE, and/or DCI.
  • RRC signaling is also referred to as RRC
  • MAC-CE MAC-CE
  • DCI DCI
  • the set of candidate beams may be notified in RRC and MAC-CE, or in MAC-CE and DCI, or in RRC and DCI, or in RRC, MAC-CE and DCI.
  • the set of candidate beams may be notified by RRC.
  • a subset of the candidate beams may be notified by MAC-CE from among the set of candidate beams notified by RRC.
  • the DL transmission beam of the NCR-Fwd in the access link or the UL reception beam of the NCR-Fwd in the access link may be notified, for example, by MAC-CE from among the subset of candidate beams notified by MAC-CE.
  • NCR30 may determine the DL transmission beam of the NCR-Fwd in the access link or the UL reception beam of the NCR-Fwd in the access link from among the subset of candidate beams notified by MAC-CE.
  • the set of candidate beams may be notified by MAC-CE.
  • a subset of the candidate beams may be notified by DCI from among the set of candidate beams notified by MAC-CE.
  • the DL transmission beam of the NCR-Fwd in the access link or the UL receiving beam of the NCR-Fwd in the access link may be notified, for example, by DCI from among the subset of candidate beams notified by DCI.
  • NCR30 may determine the DL transmission beam of the NCR-Fwd in the access link or the UL receiving beam of the NCR-Fwd in the access link from among the subset of candidate beams notified by DCI.
  • the set of candidate beams may be notified by RRC.
  • a subset of candidate beams may be notified by DCI from among the set of candidate beams notified by RRC.
  • the DL transmission beam of NCR-Fwd in the access link or the UL receiving beam of NCR-Fwd in the access link may be notified, for example, by DCI from among the subset of candidate beams notified by DCI.
  • NCR30 may determine the DL transmission beam of NCR-Fwd in the access link or the UL receiving beam of NCR-Fwd in the access link from among the subset of candidate beams notified by DCI.
  • the set of candidate beams may be notified by RRC.
  • a subset of candidate beams may be notified by MAC-CE from among the set of candidate beams notified by RRC.
  • a sub-subset of candidate beams may be notified by DCI from among the subset of candidate beams notified by MAC-CE.
  • a DL transmission beam of NCR-Fwd in the access link or a UL reception beam of NCR-Fwd in the access link may be notified, for example, by DCI from among the sub-subset of candidate beams notified by DCI.
  • NCR30 may determine a DL transmission beam of NCR-Fwd in the access link or a UL reception beam of NCR-Fwd in the access link from among the subset of candidate beams notified by DCI.
  • a set of candidate beams may be reported by NCR30 to base station 10.
  • the DL transmission beam of NCR-Fwd in the access link or the UL reception beam of NCR-Fwd in the access link may be notified from the set of candidate beams reported by NCR30.
  • a set of candidate beams may be reported to the base station 10 by the NCR 30. From the set of candidate beams reported by the NCR 30, a subset of the candidate beams may be notified by RRC, MAC-CE, or DCI. The DL transmission beam of the NCR-Fwd in the access link or the UL receiving beam of the NCR-Fwd in the access link may be notified from the subset of the candidate beams notified by RRC, MAC-CE, or DCI.
  • a set of candidate beams may be reported to the base station 10 by the NCR 30. From the set of candidate beams reported by the NCR 30, a subset of the candidate beams may be notified by RRC and MAC-CE, or by MAC-CE and DCI, or by RRC and DCI, or by RRC, MAC-CE and DCI.
  • the DL transmission beam of the NCR-Fwd in the access link or the UL receiving beam of the NCR-Fwd in the access link may be notified from the subset of the candidate beams notified by the RRC, MAC-CE or DCI.
  • the maximum number of candidate beams set by the RRC, the maximum number of candidate beams enabled by the MAC-CE, or the maximum number of candidate beams reported by the NCR 30 may be predefined or may be determined depending on the capabilities of the NCR 30.
  • the maximum number of DL transmission beams of the NCR-Fwd in the access link and the maximum number of UL reception beams of the NCR-Fwd in the access link may be different.
  • FIG. 15 is a diagram for explaining an example (1) of beams used for an access link in an embodiment of the present invention.
  • a set of candidate beams may be notified to NCR30 via RRC, MAC-CE, and/or DCI for both the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam.
  • Any beam from the set of candidate beams may be used for both the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam.
  • the operation shown in FIG. 15 may be applied to A) and D) above.
  • FIG. 16 is a diagram for explaining an example (2) of beams used for an access link in an embodiment of the present invention.
  • a set of candidate beams for DL transmission beams of the NCR-Fwd access link and a set of candidate beams for UL reception beams of the NCR-Fwd access link may be separated and notified to NCR30 via RRC, MAC-CE and/or DCI, respectively.
  • Any beam from the set of candidate beams for DL transmission beams of the NCR-Fwd access link may be used for the DL transmission beam of the NCR-Fwd access link.
  • Any beam from the set of candidate beams for UL reception beams of the NCR-Fwd access link may be used for the UL reception beam of the NCR-Fwd access link.
  • the operation shown in FIG. 16 may be applied to A) and D) above.
  • FIG. 17 is a diagram for explaining an example (3) of beams used for an access link in an embodiment of the present invention.
  • a set of candidate beams reported by NCR30 may be notified to NCR30 via RRC, MAC-CE, and/or DCI for both the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam.
  • Any beam from the set of candidate beams may be used for both the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam.
  • the operation shown in FIG. 17 may be applied to C), D), and E above.
  • FIG. 18 is a diagram for explaining an example (4) of beams used for an access link in an embodiment of the present invention.
  • a set of candidate beams reported by NCR30 for DL transmission beams of the NCR-Fwd access link and a set of candidate beams reported by NCR30 for UL reception beams of the NCR-Fwd access link may be separated and notified to NCR30 via RRC, MAC-CE and/or DCI.
  • Any beam from the set of candidate beams for DL transmission beams of the NCR-Fwd access link may be used for the DL transmission beam of the NCR-Fwd access link.
  • Any beam from the set of candidate beams for UL reception beams of the NCR-Fwd access link may be used for the UL reception beam of the NCR-Fwd access link.
  • the operation shown in FIG. 18 may be applied to the above C), D) and E).
  • FIG. 19 is a diagram for explaining an example (5) of beams used for an access link in an embodiment of the present invention.
  • a set of candidate beams may be notified to NCR30 via RRC or MAC-CE for both the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam.
  • Any beam from the set of candidate beams may be used for both the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam.
  • some of the beams in the set of candidate beams may be notified to NCR30 via MAC-CE or DCI as a subset of candidate beams. Any beam in the subset of candidate beams may be used as both a DL transmission beam for the NCR-Fwd access link and a UL reception beam for the NCR-Fwd access link.
  • the signaling may use all of RRC, MAC-CE, and DCI. Note that the operation shown in FIG. 19 may be applied to the above B) and E).
  • FIG. 20 is a diagram for explaining an example (6) of beams used for an access link in an embodiment of the present invention.
  • a set of candidate beams may be notified to NCR30 via RRC or MAC-CE for both the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam.
  • Any beam from the set of candidate beams may be used for both the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam.
  • a subset of candidate beams for DL transmission beams of the NCR-Fwd access link and a subset of candidate beams for UL reception beams of the NCR-Fwd access link may be separated and notified to NCR30 via MAC-CE or DCI as a part of the set of candidate beams.
  • Any beam from the subset of candidate beams for DL transmission beams of the NCR-Fwd access link may be used for the DL transmission beam of the NCR-Fwd access link.
  • Any beam from the subset of candidate beams for UL reception beams of the NCR-Fwd access link may be used for the UL reception beam of the NCR-Fwd access link.
  • all of RRC, MAC-CE, and DCI may be used for signaling. Note that the operation shown in FIG. 20 may be applied to the above B) and E).
  • FIG. 21 is a diagram for explaining an example (7) of beams used for an access link in an embodiment of the present invention.
  • a set of candidate beams for the DL transmission beam of the NCR-Fwd access link and a set of candidate beams for the UL reception beam of the NCR-Fwd access link may be separated and notified to NCR30 via RRC or MAC-CE, respectively.
  • Any beam from the set of candidate beams for the DL transmission beam of the NCR-Fwd access link may be used for the DL transmission beam of the NCR-Fwd access link.
  • Any beam from the set of candidate beams for the UL reception beam of the NCR-Fwd access link may be used for the UL reception beam of the NCR-Fwd access link.
  • some of the beams in the set of candidate beams for DL transmission beams of the NCR-Fwd access link may be notified to NCR30 via MAC-CE or DCI as a subset of beams that are candidates for DL transmission of the NCR-Fwd access link.
  • Some of the beams in the set of candidate beams for UL reception beams of the NCR-Fwd access link may be notified to NCR30 via MAC-CE or DCI as a subset of beams that are candidates for UL reception beams of the NCR-Fwd access link.
  • all of RRC, MAC-CE, and DCI may be used for signaling. Note that the operation shown in FIG. 21 may be applied to the above B) and E).
  • the index of the UL receiving beam of the NCR-Fwd may be the index of the beam, the index of the source RS or the index of the TCI state, as described above.
  • the index of the DL transmission beam of the NCR-Fwd may be a beam index, a source RS index, or a TCI state index.
  • the source RS may be a newly defined RS used to manage the DL transmission beam of the NCR-Fwd.
  • the source RS may be used as a reference for the spatial domain filter of the NCR 30.
  • Each source RS may occupy a predetermined time domain resource notified from the base station 10.
  • the NCR 30 amplifies and forwards each source RS from the base station 10 to the terminal 20.
  • the same DL transmission spatial filter as the notified source RS may be used.
  • the NCR 30 may assume the same TCI state as the control link of the NCR-MT. If 3GPP Release 15/16 beam management is used for the NCR-MT, the TCI state is signaled per CORESET, per PDSCH, per CSI-RS, per PUCCH resource, per PUSCH, or per SRS resource.
  • the NCR 30 may assume the same TCI state as the control link of the NCR-MT. If the unified TCI state of 3GPP Release 17 is used for the NCR-MT, the signaled unified TCI state may be applied to the channel or reference signal as shown in Table 1.
  • whether or not to apply the notified unified TCI state may be set by the RRC parameter followUnifiedTCIstate.
  • the notified unified TCI state may be applied.
  • whether or not to apply the notified unified TCI state may be set by the RRC parameter followUnifiedTCIstate. In the case of other PDSCHs, the notified unified TCI state may be applied.
  • whether or not to apply the notified unified TCI state may be configured by the RRC parameter followUnifiedTCIstate.
  • the reported integrated TCI state may always be applied.
  • whether or not to apply the notified unified TCI state may be set by the RRC parameter followUnifiedTCIstate.
  • the unified TCI state framework of 3GPP Release 17 is used for the NCR-MT, it is assumed that different TCI states will be used by the NCR-MT for different channels or RSs. In this case, it is necessary to determine which TCI state of the NCR-MT's control link should be applied to the backhaul link of the NCR-Fwd.
  • the NCR 30 does not need to transmit the UL channel and/or reference signal itself. That is, scheduling of the UL channel and/or reference signal for the NCR 30 may not be required. In the absence of instructions regarding the transmission beam to be transmitted by the NCR 30, the NCR 30 may assume that the uplink transmission beam is the latest TCI state and/or spatial relationship of the particular uplink reference signal and/or channel of the NCR 30.
  • the latest TCI state and/or spatial relationship indicated for a particular uplink reference signal and/or channel may be, for example, the latest TCI state and/or spatial relationship of the PUSCH, PUCCH or SRS, or the latest TCI state and/or spatial relationship of PUCCH resource #0.
  • the NCR 30 may also assume that the rules of 3GPP Releases 15/16/17 that determine the default beam for the PUSCH, PUCCH or SRS are reused.
  • NCR 30 does not need to detect and/or decode the downlink channel and/or reference signal in the time unit in which it is only necessary to transfer the DL signal from base station 10 to terminal 20. That is, the downlink channel or reference signal does not need to be scheduled for NCR 30.
  • NCR 30 may determine the downlink reception beam received by NCR 30 and/or the downlink transmission beam transmitted by NCR 30, assuming that the transmission beam transmitted by base station 10 is the latest TCI state indicated for a particular downlink reference signal and/or channel.
  • the latest TCI state indicated for a particular downlink reference signal and/or channel may be, for example, the latest TCI state of the PDSCH, PDCCH or CSI-RS, or the latest TCI state of CORESET#0.
  • NCR30 may also assume that the rules of 3GPP Releases 15/16/17 that determine the default beam for the PDSCH, PDCCH or CSI-RS are reused.
  • the beam management framework of 3GPP Release 15/16 may be used for the NCR-MT.
  • the NCR-MT receives a DL channel or an RS in that time unit
  • the TCI state used by the NCR-MT when receiving that DL channel or that RS may be used for the DL reception backhaul link of the NCR-Fwd in that unit time.
  • simultaneous DL reception of the NCR-MT and DL reception of the NCR-Fwd are supported.
  • the TCI state of the NCR-MT may be determined according to rules 1)-3) shown below.
  • the TCI state of the NCR-MT may be used for the DL receiving backhaul link of the NCR-Fwd in that unit time.
  • the TCI state of the NCR-MT may be determined to be the TCI state with the smallest or largest ID among the TCI states set by RRC signaling. Alternatively, the TCI state of the NCR-MT may be determined to be the TCI state with the smallest or largest ID among the TCI states enabled in the MAC-CE for the PDSCH. Alternatively, the TCI state of the NCR-MT may be determined to be the TCI state mapped to the largest or smallest TCI code point enabled in the MAC-CE for the PDSCH.
  • the NCR-MT's CORESET, CSI-RS or SSB may be determined, and the TCI state of the CORESET, CSI-RS or SSB may be used.
  • the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index may be used.
  • the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index in the latest slot in which the NCR-MT monitored the CORESET, CSI-RS or SSB may be used.
  • the TCI state corresponding to the CSI-RS or SSB identified by the NCR-MT during initial access may be used.
  • the PDSCH of the NCR-MT may be determined and the TCI state of the PDSCH may be used.
  • the TCI state of the latest PDSCH received by the NCR-MT may be used.
  • TCI state of a CORESET is selected based on a specific rule (e.g., rules 1)-3) above) to be used for the backhaul link of the NCR-Fwd
  • a specific rule e.g., rules 1)-3 above
  • only CORESETs of a specific type or only CORESETs associated with a search space set of a specific type may be selected.
  • CORESETs of a particular type may be selected, as follows: Only CORESETs related to a particular type of search space (e.g., UE specified search space (USS), Common Search Space (CSS), USS+Type3 CSS, etc.) may be selected. Any CORESET other than CORESET#0 may be selected. Only the CORESET or CORESET related to the search space that is actually monitored by the terminal may be selected. However, the set search space set may not be monitored by the terminal due to conditions such as collision with other signals. Only CORESETs associated with search spaces in which the terminal actually detected DCI may be selected. Only CORESETs that satisfy the above multiple conditions may be selected. For example, only CORESETs that are related to a USS and excluding CORESET#0 may be selected.
  • search space e.g., UE specified search space (USS), Common Search Space (CSS), USS+Type3 CSS, etc.
  • Any CORESET other than CORESET#0 may be selected. Only the CORESET or CORE
  • the TCI state of the CSI-RS is selected based on a specific rule (e.g., rules 1)-3) above) to be used for the backhaul link of the NCR-Fwd, only a specific type of CSI-RS may be selected.
  • a specific rule e.g., rules 1)-3) above
  • CSI-RS only a specific type of CSI-RS may be selected, as follows: Only CSI-RS with a specific type of time domain operation (i.e. aperiodic, semi-persistent, periodic) may be selected. Only the CSI-RS for a particular application (i.e. time/frequency tracking, CSI calculation, beam management, L1-RSRP calculation, L1-SINR calculation, mobility) may be selected. Only CSI-RS that satisfy the above conditions may be selected. For example, only CSI-RS for CSI calculation/beam management and that are semi-static may be selected.
  • TCI state of the PDSCH is selected based on a specific rule (e.g., rules 1)-3) above) to be used for the backhaul link of the NCR-Fwd, only a specific type of PDSCH may be selected.
  • PDSCH Downlink Reference Signal
  • DG Dynamic Grant
  • SPS Semi Persistent Scheduling
  • the DL reception beam of the backhaul link of the NCR-Fwd follows the NCR-MT in the case of time resources in which the NCR-MT and NCR-Fwd operate simultaneously, and is determined based on a specific rule in the case of time resources in which the NCR-MT and NCR-Fwd do not operate simultaneously.
  • the TCI state of the CORESET/CSI-RS/PDSCH is selected based on a specific rule to be used for the backhaul link of the NCR-Fwd, only a specific type of CORESET/CSI-RS/PDSCH is selected. This allows the NCR to appropriately select the DL reception beam to be applied to the radio signal to be relayed in the backhaul link of the NCR-Fwd based on control from the network.
  • TCI state may be replaced with "QCL”, "beam”, “spatial relation” or “spatial domain filter”.
  • the beam management framework of 3GPP Release 15/16 may be used for the NCR-MT.
  • the NCR-MT transmits an UL channel or an RS in that time unit
  • the TCI state used by the NCR-MT when transmitting that UL channel or that RS may be used for the UL transmission backhaul link of the NCR-Fwd in that unit time.
  • simultaneous execution of the UL transmission of the NCR-MT and the UL transmission of the NCR-Fwd is supported.
  • the TCI state of the NCR-MT may be determined according to rules 1)-7) shown below.
  • the TCI state of the NCR-MT may be used for the UL transmission backhaul link of the NCR-Fwd in that unit time.
  • the TCI state of the NCR-MT may be determined to be the TCI state with the smallest or largest ID among the TCI states set by RRC signaling. Alternatively, the TCI state of the NCR-MT may be determined to be the TCI state with the smallest or largest ID among the TCI states enabled in the MAC-CE for the PDSCH. Alternatively, the TCI state of the NCR-MT may be determined to be the TCI state mapped to the largest or smallest TCI code point enabled in the MAC-CE for the PDSCH.
  • the NCR-MT's CORESET, CSI-RS or SSB may be determined, and the TCI state of the CORESET, CSI-RS or SSB may be used.
  • the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index may be used.
  • the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index in the latest slot in which the NCR-MT monitored the CORESET, CSI-RS or SSB may be used.
  • the TCI state corresponding to the CSI-RS or SSB identified by the NCR-MT during initial access may be used.
  • the PDSCH of the NCR-MT may be determined and the TCI state of the PDSCH may be used.
  • the TCI state of the latest PDSCH received by the NCR-MT may be used.
  • the TCI state of the UL channel or RS of the NCR-MT may be determined, and the TCI state may be applied to the UL transmission backhaul of the NCR-Fwd.
  • the operations 4)-7) shown below may be performed.
  • the TCI state of the UL channel or RS of the NCR-MT may be determined by a certain PUCCH-SpatialRelationinfo or SRS-SpatialRelationinfo.
  • the TCI state may be determined by the PUCCH-SpatialRelationinfo or SRS-SpatialRelationinfo with the highest or lowest ID.
  • a PUCCH resource or an SRS resource may be determined.
  • the TCI state of the determined PUCCH resource or SRS resource may be used.
  • the TCI state of the minimum or maximum PUCCH resource ID or SRS resource ID may be used.
  • the TCI state of the minimum or maximum PUCCH resource ID or SRS resource ID in the latest slot in which the NCR-MT transmitted a PUCCH or SRS may be used.
  • the PUSCH of the NCR-MT is determined, and the TCI state of the PUSCH may be used.
  • the TCI state of the latest PUSCH transmitted by the NCR-MT may be used.
  • the TCI state of the SRS mapped to the minimum or maximum code point of the SRI field may be used.
  • the CORESET/CSI-RS selection method described in the proposal for the beam determination method for DL reception of the backhaul link of the NCR-Fwd (4-1) above may also be applied to the UL transmission of the backhaul link of the NCR-Fwd.
  • TCI state of the SRS is selected based on a specific rule (e.g., rules 1)-7) above) to be used for the backhaul link of the NCR-Fwd, only a specific type of SRS may be selected.
  • only a specific type of SRS may be selected, as follows: Only SRS with a specific type of time domain behavior (i.e. aperiodic, quasi-static, periodic) may be selected. Only the SRS for a particular application (i.e. codebook, non-codebook, beam management, antenna switching) may be selected. Only SRSs that satisfy the above conditions may be selected. For example, if the SRS is for beam management, only aperiodic SRSs may be selected, and if the SRS is for codebook, non-codebook, or antenna switching, only aperiodic, quasi-static, or periodic SRSs may be selected.
  • TCI state of the PUSH is selected based on a specific rule (e.g., rules 1)-7) above) to be used for the backhaul link of the NCR-Fwd, only a specific type of PUSH may be selected.
  • rules 1-7 e.g., rules 1-7
  • PUSCH For example, only certain types of PUSCH may be selected as follows: - Only DG-PUSCH may be selected and CG-PUSCH may not be selected. - Only DG-PUSCH or Type 2 CG-PUSCH may be selected, and Type 1 CG-PUSCH may not be selected.
  • TCI state of the PUCCH is selected based on a specific rule (e.g., rules 1)-7) above) to be used for the backhaul link of the NCR-Fwd, only a specific type of PUCCH may be selected.
  • rules 1-7 e.g., rules 1-7
  • only certain types of PUCCH may be selected, as follows: Only DCI-triggered PUCCH may be selected. Only DCI-triggered PUCCH or semi-static PUCCH may be selected, and no periodic PUCCH may be selected.
  • the UL transmission beam of the backhaul link of the NCR-Fwd follows the NCR-MT in the case of time resources in which the NCR-MT and NCR-Fwd operate simultaneously, and is determined based on a specific rule in the case of time resources in which the NCR-MT and NCR-Fwd do not operate simultaneously. Also, when the TCI state of CORESET/CSI-RS/SRS/PUSCH/PUCCH is selected based on a specific rule to be used for the backhaul link of the NCR-Fwd, only a specific type of CORESET/CSI-RS/SRS/PUSCH/PUCCH is selected. This allows the NCR to appropriately select the UL transmission beam to be applied to the radio signal to be relayed in the backhaul link of the NCR-Fwd based on control from the network.
  • the SRS resources may be limited to SRS resources configured for codebook, non-codebook, beam management, or antenna switching.
  • TCI state may be replaced with "QCL”, "beam”, “spatial relation”, or “spatial domain filter”.
  • the unified TCI state framework of 3GPP Release 17 may be used for the NCR-MT.
  • the NCR-MT receives a DL channel or an RS in that time unit
  • the TCI state used by the NCR-MT when receiving that DL channel or that RS may be used for the DL reception backhaul link of the NCR-Fwd in that unit time.
  • simultaneous DL reception of the NCR-MT and DL reception of the NCR-Fwd are supported.
  • the TCI state of the NCR-MT may be determined according to rules 1)-3) shown below.
  • the TCI state of the NCR-MT may be used for the DL receiving backhaul link of the NCR-Fwd in that unit time.
  • the TCI state of the NCR-MT may be determined to be the TCI state with the smallest or largest ID among the TCI states set by RRC signaling. Alternatively, the TCI state of the NCR-MT may be determined to be the TCI state with the smallest or largest ID among the TCI states enabled in the MAC-CE for the PDSCH. Alternatively, the TCI state of the NCR-MT may be determined to be the TCI state mapped to the largest or smallest TCI code point enabled in the MAC-CE for the PDSCH.
  • the NCR-MT's CORESET, CSI-RS or SSB may be determined, and the TCI state of the CORESET, CSI-RS or SSB may be used.
  • the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index may be used.
  • the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index in the latest slot in which the NCR-MT monitored the CORESET, CSI-RS or SSB may be used.
  • the TCI state corresponding to the CSI-RS or SSB identified by the NCR-MT during initial access may be used.
  • the PDSCH of the NCR-MT may be determined and the TCI state of the PDSCH may be used.
  • the TCI state of the latest PDSCH received by the NCR-MT may be used.
  • the TCI state of CORESET/CSI-RS/PDSCH is selected based on a specific rule (e.g., the rule in 1)-3) above) to be used for the backhaul link of the NCR-Fwd
  • a specific rule e.g., the rule in 1)-3 above
  • only a specific type of CORESET/CSI-RS/PDSCH may be selected, as explained in the proposal for the method of determining the beam for DL reception of the backhaul link of the NCR-Fwd above (4-1).
  • the DL reception beam of the backhaul link of the NCR-Fwd follows the NCR-MT in the case of time resources in which the NCR-MT and NCR-Fwd operate simultaneously, and is determined based on a specific rule in the case of time resources in which the NCR-MT and NCR-Fwd do not operate simultaneously.
  • the TCI state of the CORESET/CSI-RS/PDSCH is selected based on a specific rule to be used for the backhaul link of the NCR-Fwd, only a specific type of CORESET/CSI-RS/PDSCH is selected. This allows the NCR to appropriately select the DL reception beam to be applied to the radio signal to be relayed in the backhaul link of the NCR-Fwd based on control from the network.
  • TCI state may be replaced with "QCL”, "beam”, “spatial relation” or “spatial domain filter”.
  • the unified TCI state framework of 3GPP Release 17 may be used for the NCR-MT.
  • the NCR-MT transmits an UL channel or an RS in that time unit
  • the TCI state used by the NCR-MT when transmitting that UL channel or that RS may be used for the UL transmission backhaul link of the NCR-Fwd in that unit time.
  • simultaneous execution of the UL transmission of the NCR-MT and the UL transmission of the NCR-Fwd is supported.
  • the TCI state of the NCR-MT may be determined according to rules 1)-7) shown below.
  • the TCI state of the NCR-MT may be used for the UL transmission backhaul link of the NCR-Fwd in that unit time.
  • the TCI state of the NCR-MT may be determined to be the TCI state with the smallest or largest ID among the TCI states set by RRC signaling. Alternatively, the TCI state of the NCR-MT may be determined to be the TCI state with the smallest or largest ID among the TCI states enabled in the MAC-CE for the PDSCH. Alternatively, the TCI state of the NCR-MT may be determined to be the TCI state mapped to the largest or smallest TCI code point enabled in the MAC-CE for the PDSCH.
  • the NCR-MT's CORESET, CSI-RS or SSB may be determined, and the TCI state of the CORESET, CSI-RS or SSB may be used.
  • the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index may be used.
  • the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index in the latest slot in which the NCR-MT monitored the CORESET, CSI-RS or SSB may be used.
  • the TCI state corresponding to the CSI-RS or SSB identified by the NCR-MT during initial access may be used.
  • the PDSCH of the NCR-MT may be determined and the TCI state of the PDSCH may be used.
  • the TCI state of the latest PDSCH received by the NCR-MT may be used.
  • the TCI state of the UL channel or RS of the NCR-MT may be determined, and the TCI state may be applied to the UL transmission backhaul of the NCR-MT.
  • the operations 4)-6) shown below may be performed.
  • the TCI state of the UL channel or RS of the NCR-MT may be determined by a certain PUCCH-SpatialRelationinfo or SRS-SpatialRelationinfo.
  • the TCI state may be determined by the PUCCH-SpatialRelationinfo or SRS-SpatialRelationinfo with the highest or lowest ID.
  • a PUCCH resource or an SRS resource may be determined.
  • the TCI state of the determined PUCCH resource or SRS resource may be used.
  • the TCI state of the minimum or maximum PUCCH resource ID or SRS resource ID may be used.
  • the TCI state of the minimum or maximum PUCCH resource ID or SRS resource ID in the latest slot in which the NCR-MT transmitted a PUCCH or SRS may be used.
  • the PUSCH of the NCR-MT is determined, and the TCI state of the PUSCH may be used.
  • the TCI state of the latest PUSCH transmitted by the NCR-MT may be used.
  • the TCI state of the SRS mapped to the minimum or maximum code point of the SRI field may be used.
  • the TCI state of CORESET/CSI-RS/SRS/PUSCH/PUCCH is selected based on a specific rule (e.g., the rule 1)-7) above) to be used for the backhaul link of the NCR-Fwd
  • a specific rule e.g., the rule 1)-7) above
  • only a specific type of CORESET/CSI-RS/SRS/PUSCH/PUCCH may be selected, as explained in the proposal for the method of determining the beam for DL reception of the backhaul link of the NCR-Fwd above (4-1).
  • the UL transmission beam of the backhaul link of the NCR-Fwd follows the NCR-MT in the case of time resources in which the NCR-MT and NCR-Fwd operate simultaneously, and is determined based on a specific rule in the case of time resources in which the NCR-MT and NCR-Fwd do not operate simultaneously. Also, when the TCI state of CORESET/CSI-RS/SRS/PUSCH/PUCCH is selected based on a specific rule to be used for the backhaul link of the NCR-Fwd, only a specific type of CORESET/CSI-RS/SRS/PUSCH/PUCCH is selected. This allows the NCR to appropriately select the UL transmission beam to be applied to the radio signal to be relayed in the backhaul link of the NCR-Fwd based on control from the network.
  • the SRS resources may be limited to SRS resources configured for codebook, non-codebook, beam management, or antenna switching.
  • TCI state may be replaced with "QCL”, "beam”, “spatial relation”, or “spatial domain filter”.
  • the period between the most recent DL reception/UL transmission of the NCR-MT and the DL reception/UL transmission of the NCR-Fwd backhaul link is longer than a specified period, there is a high possibility that the channel condition will change significantly during that period, and therefore it is considered inappropriate to use the TCI state of the most recent DL reception/UL transmission of the NCR-MT for the DL reception/UL transmission of the NCR-Fwd backhaul link. For this reason, in this case, it is considered desirable for the TCI state of the DL reception/UL transmission of the NCR-Fwd backhaul link to be determined/indicated by another method.
  • the TCI state of the most recent NCR-MT DL reception/UL transmission may be used for the TCI state of the NCR-Fwd backhaul link DL reception/UL transmission.
  • the above value X is a positive value.
  • the value X may be defined in the specifications, or may be determined based on information contained in any of the higher layer signals, MAC CE, and DCI received by the NCR 30 from the network (base station 10). It may be assumed that the value X is reported to the base station 10 as capability information of the NCR 30.
  • the value X may be variably set according to the propagation environment between the base station 10 and the NCR 30.
  • the base station 10 may receive a detection/measurement signal (e.g., PSS, SSS, CSI-RS, etc.) beam-transmitted from the NCR 30, and determine the value X based on the measurement result of the reception quality. Examples of reception quality include RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), and SINR (Signal to Interference plus Noise Ratio).
  • the TCI state of the NCR-Fwd backhaul link DL reception/UL transmission may be determined as follows.
  • the TCI state of the NCR-MT may be determined by other predefined rules (e.g., the rules described in ⁇ Operation 4> above), and the TCI state of the NCR-MT may be used for the backhaul link of the NCR-Fwd. Note that the variations described in ⁇ Operation 4> above regarding the restrictions on the selection of PDSCH/PDCCH/CSI-RS/SSB/PUSCH/PUCCH/SRS may also be applied in ⁇ Operation 6>.
  • NCR 30 expects the TCI status of the backhaul link of the NCR-Fwd to be explicitly indicated by new signaling, and the NCR-Fwd may determine the beam for DL reception/UL transmission according to the instructions of the signaling.
  • the predetermined time that serves as the basis for the determination is X symbols.
  • the TCI state (TCI#1) of the most recent DL reception/UL transmission of the NCR-MT 410 is used for the TCI state of the DL reception/UL transmission of the backhaul link 420 of the NCR-Fwd.
  • the TCI state of the DL reception/UL transmission of the backhaul link 420 of the NCR-Fwd is determined based on other predefined rules, etc.
  • the DL reception/UL transmission beams of the backhaul link of the NCR-Fwd follow the NCR-MT if the start/end timing of the most recent NCR-MT is later than a predetermined time before the start timing of the backhaul of the NCR-Fwd, and are determined based on specific rules in other cases.
  • the network-controlled repeater can apply a UL receiving beam and a DL transmitting beam to the radio signal relayed in the access link of the NCR-Fwd based on control from the network. Also, the network-controlled repeater can apply a DL receiving beam and a UL transmitting beam to the radio signal relayed in the backhaul link of the NCR-Fwd based on control from the network.
  • wireless signals can be relayed by a wireless relay device controlled by the network.
  • Capabilities may be defined in the NCR. Capabilities defined for the NCR may be the same as or different from capabilities defined for the terminal. For example, capabilities defined for the NCR may include at least a part of capabilities defined for the terminal. Furthermore, capabilities defined for the terminal may include at least a part of capabilities defined for the NCR. Furthermore, at least a part of capabilities defined for the terminal may implicitly or explicitly indicate at least a part of capabilities defined for the NCR.
  • the NCR may report the following capabilities regarding the backhaul link of the NCR-Fwd to the base station. -Whether network control of NCR-Fwd backhaul link beam is supported
  • each of the above proposals may be applied when the functionality corresponding to the proposal is supported by the NCR and/or when the functionality corresponding to the proposal is enabled by a parameter in a higher layer.
  • each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices.
  • the functional blocks may be realized by combining the one device or the multiple devices with software.
  • Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
  • a functional block (component) that performs the transmission function is called a transmitting unit or transmitter. In either case, as mentioned above, there are no particular limitations on the method of realization.
  • the base station 10, terminal 20, wireless relay device 30, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 23 is a diagram showing an example of the hardware configuration of the base station 10, terminal 20, and wireless relay device 30 in one embodiment of the present disclosure.
  • the above-mentioned base station 10, terminal 20, and wireless relay device 30 may be physically configured as a computer device 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, etc.
  • the term "apparatus" can be interpreted as a circuit, device, unit, etc.
  • the hardware configurations of the base station 10, the terminal 20, and the wireless relay device 30 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.
  • the functions of the base station 10, the terminal 20, and the wireless relay device 30 are realized by loading specific software (programs) onto hardware such as the processor 1001 and the memory device 1002, causing the processor 1001 to perform calculations, control communications by the communication device 1004, and control at least one of the reading and writing of data in the memory device 1002 and the auxiliary memory device 1003.
  • the processor 1001 for example, operates an operating system to control the entire computer.
  • the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control unit, an arithmetic unit, registers, etc.
  • CPU central processing unit
  • control unit 140, control unit 240, etc. may be realized by the processor 1001.
  • the processor 1001 reads out a program (program code), software module, 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 the program.
  • the program is a program that causes a computer to execute at least a part of the operations described in the above embodiment.
  • the control unit 140 of the base station 10 shown in FIG. 2 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 3 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from a network via a telecommunication line.
  • the storage device 1002 is a computer-readable recording medium, and may be composed of at least one of, for example, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc.
  • the storage device 1002 may also be called a register, a cache, a main memory, etc.
  • the storage device 1002 can store executable programs (program codes), software modules, etc., for implementing a communication method according to one embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc.
  • the above-mentioned storage medium may be, for example, a database, a server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary 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, for example, a network device, a network controller, a network card, a communication module, etc.
  • the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., 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 transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, etc. may be realized by the communication device 1004.
  • the transmitting/receiving unit may be implemented as a transmitting unit or a receiving unit that is physically or logically separated.
  • the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (e.g., 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 each device.
  • the base station 10, the terminal 20, and the wireless relay device 30 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware.
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • the wireless 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, as necessary.
  • FIG. 24 shows an example configuration of a vehicle 2001.
  • the 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 2021-2029, an information service unit 2012, and a communication module 2013.
  • a communication device mounted on the vehicle 2001 and may be applied to the communication module 2013, for example.
  • the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
  • the steering unit 2003 includes at least a steering wheel (also called a handlebar), 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, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001.
  • the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
  • Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front and rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front and rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a 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, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.
  • the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
  • the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
  • the information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
  • input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
  • output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
  • the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) maps, autonomous vehicle (AV) maps, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and AI processor, as well as one or more ECUs that control these devices.
  • the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
  • the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port.
  • the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided on the vehicle 2001.
  • 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 the external device via wireless communication.
  • the communication module 2013 may be located either inside or outside the electronic control unit 2010.
  • the external device may be, for example, a base station, a mobile station, etc.
  • the communication module 2013 may transmit at least one of the signals from the various sensors 2021-2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication.
  • the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input.
  • the PUSCH transmitted by the communication module 2013 may include information based on the above input.
  • the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001.
  • the information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
  • the communication module 2013 also stores various information received from an external device in a memory 2032 that can be used by the microprocessor 2031.
  • the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.
  • a wireless relay device which has a communication unit that transmits and receives control information via a first link used for exchanging control information between a base station and the wireless relay device, and a control unit that determines a first time resource and a first downlink receiving beam/uplink transmitting beam assigned to the wireless relay device in the first link based on the control information, and determines a second time resource and a second downlink receiving beam/uplink transmitting beam assigned to the wireless relay device in a second link between the base station and the wireless relay device used for transferring signals between the base station and a terminal, wherein the control unit determines whether to cause the first downlink receiving beam/uplink transmitting beam to follow the second downlink receiving beam/uplink transmitting beam based on the relationship between the first time resource and the second time resource.
  • the network-controlled repeater can appropriately select the DL receiving beam and UL transmitting beam to be applied to the wireless signal relayed in the backhaul link of the NCR-Fwd based on control from the network.
  • the control unit may cause the second downlink receiving beam/uplink transmitting beam to follow the first downlink receiving beam/uplink transmitting beam when the first time resource and the second time resource operate simultaneously, and may determine the second downlink receiving beam/uplink transmitting beam based on a specific rule and select a resource for a specific type of control signal from the second time resources when the first time resource and the second time resource do not operate simultaneously.
  • the network-controlled repeater can appropriately select a DL receiving beam and a UL transmitting beam to be applied to a radio signal to be relayed in the backhaul link of the NCR-Fwd based on control from the network.
  • the control unit is When the timing of the downlink reception/uplink transmission of the first time resource and the timing of the downlink reception/uplink transmission of the second time resource are shorter than a predetermined period, the second downlink reception beam/uplink transmission beam may be made to follow the first downlink reception beam/uplink transmission beam.
  • the network-controlled repeater can appropriately select a DL reception beam and a UL transmission beam to be applied to a radio signal to be relayed in a backhaul link of the NCR-Fwd based on control from the network.
  • the control unit may determine the second downlink receiving beam/uplink transmitting beam based on a specific rule when the timing of the downlink receiving/uplink transmitting of the first time resource and the timing of the downlink receiving/uplink transmitting of the second time resource are longer than a predetermined period.
  • the network controlled repeater can appropriately select the DL receiving beam and the UL transmitting beam to be applied to the radio signal to be relayed in the backhaul link of the NCR-Fwd based on the control from the network.
  • a communication method in which a wireless relay device transmits and receives control information via a first link used for exchanging the control information between a base station and the wireless relay device, determines a first time resource and a first downlink receiving beam/uplink transmitting beam assigned to the wireless relay device in the first link based on the control information, determines a second time resource and a second downlink receiving beam/uplink transmitting beam assigned to the wireless relay device in a second link between the base station and the wireless relay device used for transferring signals between the base station and a terminal, and determines whether to cause the first downlink receiving beam/uplink transmitting beam to follow the second downlink receiving beam/uplink transmitting beam based on the relationship between the first time resource and the second time resource.
  • the network-controlled repeater can appropriately select the DL receiving beam and UL transmitting beam to be applied to the wireless signal relayed in the backhaul link of the NCR-Fwd based on control from the network.
  • the operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts.
  • the order of processing procedures described in the embodiment 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, but such devices may be realized by hardware, software, or a combination thereof.
  • the software operated by the processor possessed by the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor possessed by the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • the notification of information is not limited to the aspects/embodiments described in the present disclosure and may be performed using other methods.
  • the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination of these.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
  • Each aspect/embodiment described in this disclosure may be a mobile communication system (mobile communications system) for mobile communications over a wide range of networks, including LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal number)), FRA (Future Ra).
  • the present invention may be applied to at least one of systems using IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems, and next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (for example, a combination of at least one
  • certain operations that are described as being performed by the base station 10 may in some cases be performed by its upper node.
  • various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW).
  • the base station 10 may be a combination of multiple other network nodes (such as an MME and an S-GW).
  • the information or signals described in this disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may be input and output via multiple network nodes.
  • the input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table.
  • the input and output information may be overwritten, updated, or added to.
  • the output information may be deleted.
  • the input information may be sent to another device.
  • the determination in this disclosure may be based on a value represented by one bit (0 or 1), a Boolean (true or false) value, or a comparison of numerical values (e.g., a comparison with a predetermined value).
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
  • wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
  • wireless technologies such as infrared, microwave
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
  • the channel and the symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
  • system and “network” are used interchangeably.
  • a radio resource may be indicated by an index.
  • the names used for the above-mentioned parameters are not limiting in any respect. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
  • the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.
  • base station BS
  • radio base station base station
  • base station fixed station
  • NodeB eNodeB
  • gNodeB gNodeB
  • access point e.g., "transmission point”
  • gNodeB gNodeB
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (e.g., three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
  • a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station may also be referred to by those skilled in the art as a 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 terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
  • At least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
  • the moving object is a movable object, and the moving speed is arbitrary. It also includes the case where the moving object is stopped.
  • the moving object includes, but is not limited to, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and objects mounted thereon.
  • the moving object may also be a moving object that travels autonomously based on an operation command.
  • At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations.
  • at least one of the base station and the 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.
  • each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
  • the terminal 20 may be configured to have the functions of the base station 10 described above.
  • terms such as "uplink” and "downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "side").
  • the uplink channel, downlink channel, etc. may be read as a side channel.
  • the user terminal in this disclosure may be interpreted as a base station.
  • the base station may be configured to have the functions of the user terminal described above.
  • determining may encompass a wide variety of actions.
  • Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), and considering ascertaining as “judging” or “determining.”
  • determining and “determining” may include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and considering ascertaining as “judging” or “determining.”
  • judgment” and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment (decision)” can be interpreted as “assuming,” “ex
  • connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between elements may be physical, logical, or a combination thereof.
  • “connected” may be read as "access.”
  • two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
  • the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to an element using a designation such as "first,” “second,” etc., 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, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
  • a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
  • Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, a particular filtering operation performed by the transceiver in the frequency domain, a particular windowing operation performed by the transceiver in the time domain, etc.
  • SCS Subcarrier Spacing
  • TTI Transmission Time Interval
  • radio frame structure a particular filtering operation performed by the transceiver in the frequency domain, a particular windowing operation performed by the transceiver in the time domain, etc.
  • a slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.).
  • a slot may be a time unit based on numerology.
  • a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name that corresponds to the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a Transmission Time Interval (TTI)
  • TTI Transmission Time Interval
  • multiple consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI.
  • at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
  • the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
  • TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
  • a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units.
  • wireless resources such as frequency bandwidth and transmission power that can be used by each terminal 20
  • TTI is not limited to this.
  • the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
  • the time interval e.g., the number of symbols
  • the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit of scheduling.
  • the number of slots (minislots) that constitute the minimum time unit of 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, etc.
  • TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
  • a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
  • a short TTI e.g., a shortened TTI, etc.
  • TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers included in an RB may be determined based on the numerology.
  • the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
  • PRB physical resource block
  • SCG sub-carrier group
  • REG resource element group
  • PRB pair an RB pair, etc.
  • a resource block may be composed of one or more resource elements (REs).
  • REs resource elements
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • a bandwidth part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within the 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 within one carrier for the terminal 20.
  • At least one of the configured BWPs may be active, and the terminal 20 may not be expected to transmit or receive a specific signal/channel outside the active BWP.
  • BWP bit stream
  • radio frames, subframes, slots, minislots, and symbols are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean “A and B are each different from C.”
  • Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
  • notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).
  • variable section 340 and the antenna section 350 are an example of a relay section.
  • Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 30 Wireless relay device 310 Transmitter 320 Receiver 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 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheels 2008 Rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 RPM 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 assistance system section 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port) 2033 Communication port (IO port)

Landscapes

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

Abstract

Le présent dispositif de relais radio comprend : une unité de communication qui transmet/reçoit des informations de commande entre une station de base et le dispositif de relais radio par l'intermédiaire d'une première liaison destinée à être utilisée pour échanger les informations de commande ; et une unité de commande qui, sur la base des informations de commande, détermine un premier faisceau de transmission de liaison montante / faisceau de réception de liaison descendante et une première ressource temporelle attribuée au dispositif de relais radio dans la première liaison et détermine un second faisceau de transmission de liaison montante / faisceau de réception de liaison descendante et une seconde ressource temporelle attribuée au dispositif de relais radio, dans une seconde liaison entre la station de base et le dispositif de relais radio, destinée à être utilisée pour transférer un signal entre la station de base et un terminal. L'unité de commande détermine, sur la base de la relation entre la première ressource temporelle et la seconde ressource temporelle, s'il faut amener le second faisceau de transmission de liaison montante / faisceau de réception de liaison descendante à suivre le premier faisceau de transmission de liaison montante / faisceau de réception de liaison descendante.
PCT/JP2022/036589 2022-09-29 2022-09-29 Dispositif de relais radio et procédé de communication WO2024069897A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/036589 WO2024069897A1 (fr) 2022-09-29 2022-09-29 Dispositif de relais radio et procédé de communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/036589 WO2024069897A1 (fr) 2022-09-29 2022-09-29 Dispositif de relais radio et procédé de communication

Publications (1)

Publication Number Publication Date
WO2024069897A1 true WO2024069897A1 (fr) 2024-04-04

Family

ID=90476888

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/036589 WO2024069897A1 (fr) 2022-09-29 2022-09-29 Dispositif de relais radio et procédé de communication

Country Status (1)

Country Link
WO (1) WO2024069897A1 (fr)

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CATT: "Side control information to enable NR network-controlled repeaters", 3GPP TSG RAN WG1 #110 R1-2206413, 12 August 2022 (2022-08-12), XP052274345 *
NTT DOCOMO, INC.: "Discussion on L1/L2 signaling for side control information", 3GPP TSG RAN WG1 #110 R1-2207421, 12 August 2022 (2022-08-12), XP052275356 *
ZTE: "Discussion on side control information to enable NR network-controlled", 3GPP TSG RAN WG1 #109-E R1-2203237, 29 April 2022 (2022-04-29), XP052152882 *

Similar Documents

Publication Publication Date Title
WO2023105802A1 (fr) Dispositif de relais sans fil, station de base et procédé de relais sans fil
WO2024069897A1 (fr) Dispositif de relais radio et procédé de communication
WO2024106461A1 (fr) Dispositif de relais radio et procédé de communication
WO2024106453A1 (fr) Dispositif de relais sans fil et procédé de communication
WO2024080018A1 (fr) Dispositif de relais sans fil et procédé de relais sans fil
WO2024018610A1 (fr) Dispositif de relais sans fil et procédé de communication
WO2023181377A1 (fr) Dispositif de relais radio et procédé de communication
WO2024038597A1 (fr) Dispositif de relais radio et procédé de relais radio
WO2023181378A1 (fr) Dispositif de relais radio et procédé de communication
WO2024038596A1 (fr) Dispositif de relais sans fil et procédé de relais sans fil
WO2023209905A1 (fr) Dispositif relais radio, et procédé de communication
WO2023145031A1 (fr) Dispositif de relais radio et procédé de communication
WO2023145029A1 (fr) Dispositif de relais sans fil et procédé de communication
WO2023145030A1 (fr) Dispositif de relais radio et procédé de communication
WO2023067818A1 (fr) Dispositif de relais radio et procédé de communication
WO2023105804A1 (fr) Dispositif de relais sans fil, station de base, et procédé de relais sans fil
WO2023127063A1 (fr) Dispositif de relais sans fil, dispositif de communication et procédé de relais sans fil
WO2023209922A1 (fr) Dispositif de relais sans fil, station de base, et procédé de relais sans fil
WO2023175940A1 (fr) Dispositif de relais sans fil, station de base, et procédé de relais sans fil
WO2023067819A1 (fr) Dispositif de relais radio et procédé de communication
WO2023209921A1 (fr) Dispositif de relais sans fil, station de base, et procédé de relais sans fil
WO2023105803A1 (fr) Dispositif de communication, station de base, et procédé de communication
WO2023112106A1 (fr) Dispositif relais sans fil et procédé de communication
WO2023209923A1 (fr) Dispositif de relais sans fil, station de base, et procédé de relais sans fil
WO2023209924A1 (fr) Dispositif de relais sans fil, station de base, et procédé de relais sans fil

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22960956

Country of ref document: EP

Kind code of ref document: A1