Wireless relay device and communication method

Abstract

A wireless relay device is provided with: a communication unit that transmits and receives signaling including control information relating to a relay function to and from a base station; a control unit that controls a relay function on the basis of the control information; and a relay unit that performs a relay function of receiving an uplink signal from a terminal, transmitting the uplink signal to the base station, receiving a downlink signal from the base station, and transmitting the downlink signal to the terminal, the control unit performing a relay function on the basis of the control information. An uplink reception beam to be applied to reception of the uplink signal, an uplink transmission beam to be applied to transmission of the uplink signal, a downlink reception beam to be applied to reception of the downlink signal, and a downlink transmission beam to be applied to transmission of the downlink signal are determined.

Description

Technical Field

[0001] The present invention relates to a wireless relay device and a communication method in a wireless communication system. Background Art

[0002] In 3GPP (registered trademark) (3rd Generation Partnership Project), research on a wireless communication method called 5G or NR (New Radio) (hereinafter referred to as "NR") is being conducted to achieve further increases in system capacity, further increases in data transmission speed, and further reductions in latency in wireless intervals. In 5G, various wireless technologies and network architectures are being studied to meet the requirements of achieving a throughput of more than 10 Gbps and a latency of less than 1 ms in wireless intervals (e.g., Non-Patent Document 1).

[0003] In the next generation of communications, high frequency bands are expected to be used. From the perspective of reducing the number of scatterers, reducing shadow effects, and increasing distance attenuation due to the characteristics of this high frequency band, communication quality is required to be improved. Beam control and environments that ensure communication quality are assumed.

[0004] For example, in high frequency bands, there is a problem that blind spots are easily generated due to the strong straightness of radio waves. Therefore, attempts have been made to improve communication quality in multipath environments by using passive repeaters or active reflectors (RIS: Reconfigurable Intelligent Surface) to receive and amplify signals and re-radiate them, etc. (e.g., Non-Patent Document 2).

[0005] Prior art literature

[0006] Non-patent literature

[0007] Non-patent document 1: 3GPP TS 38.300 V16.8.0 (2021-12)

[0008] Non-patent document 2: NTT DoCoMo, "White Paper 5G Advanced and 6G" (2021-02, version 3.0) Internet <URL:https: / / www.nttdocomo.co.jp / binary / pdf / corporate / technology / whitepaper_6g / DOCOMO_6G_White_PaperJP_20210203.pdf>

[0009] Non-patent document 3: 3GPP TS 38.213 V16.8.0 (2021-12) Summary of the invention

[0010] Problems to be solved by the invention

[0011] As described above, research has been conducted on wireless relay devices such as reflectors or smart repeaters that relay radio waves by reflecting or transmitting radio waves from a radio wave generating source such as a base station to a radio wave receiving destination such as a terminal. In particular, it is necessary to clarify the communication control when a wireless relay device controlled by a network relays a wireless signal between a base station terminal.

[0012] The present invention has been made in view of the above-mentioned situation, and an object of the present invention is to relay a wireless signal by a wireless relay device controlled by a network in a wireless communication system.

[0013] Means for solving problems

[0014] According to the disclosed technology, a wireless relay device is provided, which comprises: a communication unit, which sends and receives signaling containing control information related to the relay function with a base station; a control unit, which controls the relay function based on the control information; and a relay unit, which performs the following relay functions: receiving an uplink signal from a terminal, sending the uplink signal to the base station, receiving a downlink signal from the base station, and sending the downlink signal to the terminal, the control unit determining, based on the control information, an uplink receive beam applied to the reception of the uplink signal, an uplink transmit beam applied to the transmission of the uplink signal, a downlink receive beam applied to the reception of the downlink signal, and a downlink transmit beam applied to the transmission of the downlink signal.

[0015] Effects of the Invention

[0016] According to the disclosed technology, in a wireless communication system, a wireless signal can be relayed by a wireless relay device controlled by a network. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a diagram for explaining a wireless communication system in an embodiment of the present invention.

[0018] Figure 2 It is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention.

[0019] Figure 3 This is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention.

[0020] Figure 4 This is a diagram showing an example of the functional configuration of the wireless relay device 30 in the embodiment of the present invention.

[0021] Figure 5 It is a diagram showing an operation example of the wireless relay device 30 in the embodiment of the present invention.

[0022] Figure 6 is a diagram showing an example of communication in a high frequency band.

[0023] Figure 7 This is a diagram showing an example of a reflective type wireless relay device 30 in the embodiment of the present invention.

[0024] Figure 8 This is a diagram showing an example of a transmission-type wireless relay device 30 in the embodiment of the present invention.

[0025] Fig. 9 This is a diagram showing an example of a network controlled repeater in the embodiment of the present invention.

[0026] Fig.10 This is a diagram for explaining example (1) of a UL transmission beam in an embodiment of the present invention.

[0027] Fig.11 This is a diagram for explaining example (2) of a UL transmission beam in an embodiment of the present invention.

[0028] Fig.12 This is a diagram for illustrating example (3) of a UL transmission beam in an embodiment of the present invention.

[0029] Fig.13 This is a diagram for illustrating example (4) of a UL transmission beam in an embodiment of the present invention.

[0030] Fig.14 This is a diagram for illustrating example (5) of a UL transmission beam in an embodiment of the present invention.

[0031] Fig.15 This is a diagram for explaining example (1) of a beam used for an access link in an embodiment of the present invention.

[0032] Fig.16 This is a diagram for explaining example (2) of a beam used in an access link in an embodiment of the present invention.

[0033] Fig.17 This is a diagram for explaining example (3) of a beam used in an access link in an embodiment of the present invention.

[0034] Fig.18 This is a diagram for explaining example (4) of a beam used in an access link in an embodiment of the present invention.

[0035] Fig.19 This is a diagram for explaining example (5) of a beam used in an access link in an embodiment of the present invention.

[0036] Fig. 20 This is a diagram for illustrating example (6) of a beam used in an access link in an embodiment of the present invention.

[0037] Fig.21 This is a diagram for illustrating example (7) of a beam used in an access link in an embodiment of the present invention.

[0038] Fig. 22 This is a diagram showing an example of the hardware configuration of the base station 10 , the terminal 20 , or the wireless relay device 30 in the embodiment of the present invention.

[0039] Fig.23 1 is a diagram showing an example of the structure of a vehicle 2001 in the embodiment of the present invention. DETAILED DESCRIPTION

[0040] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below is only an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0041] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are appropriately used. The existing technologies are, for example, existing LTE, but are not limited to existing LTE. In addition, unless otherwise specified, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and subsequent methods (e.g., NR) of LTE-Advanced.

[0042] In addition, in the embodiments of the present invention described below, the terms 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), etc. used in the previous LTE are used. These are for the convenience of recording, and the same signals, functions, etc. may also be referred to by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used for NR are not necessarily clearly recorded as "NR-".

[0043] Furthermore, in the embodiments of the present invention, the duplexing method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0044] In the embodiment of the present invention, “configuring” wireless parameters and the like may be pre-configuring predetermined values, or may be configuring wireless parameters notified from the base station 10 or the terminal 20 .

[0045] Figure 1 1 is a diagram for explaining a wireless communication system in an embodiment of the present invention. Figure 1 As shown, the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20. The base station 10 and the terminal 20 may be multiple.

[0046] 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. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or resource blocks. In addition, the TTI (Transmission Time Interval) in the time domain can be a time slot or a subslot, and the TTI can be a subframe.

[0047] The base station 10 can perform carrier aggregation for bundling a plurality of cells (a plurality of CCs (component carriers)) to communicate with the terminal 20. In carrier aggregation, one primary cell (PCell) and one or more secondary cells (SCells, Secondary Cells) are used.

[0048] The base station 10 sends synchronization signals and system information to the terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. The system information is sent, for example, via NR-PBCH or PDSCH, and is also called broadcast information. Figure 1 As shown, the base station 10 sends a control signal or data to the terminal 20 via DL (Downlink), and receives a control signal or data from the terminal 20 via UL (Uplink). In addition, here, the content sent through a control channel such as PUCCH and PDCCH is called a control signal, and the content sent through a shared channel such as PUSCH and PDSCH is called data, but such a name is only an example.

[0049] The terminal 20 is a communication device having a wireless communication function, such as a smart phone, a mobile phone, a tablet computer, a wearable terminal, or an M2M (Machine-to-Machine) communication module. Figure 1 As shown, the terminal 20 receives a control signal or data from the base station 10 via DL and sends a control signal or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. In addition, the terminal 20 may be referred to as UE and the base station 10 may be referred to as gNB.

[0050] The terminal 20 can perform carrier aggregation for bundling a plurality of cells (a plurality of CCs) to communicate with the base station 10. In carrier aggregation, one primary cell and one or more secondary cells are used. Alternatively, a PUCCH-SCell having a PUCCH may be used.

[0051] In the wireless communication system according to the embodiment of the present invention, as an example, the base station 10 is a wireless base station operating in accordance with 5G or 6G, and forms a cell. In addition, the cell is a relatively large cell, which is called a macro cell.

[0052] Base stations 10A to 10D are base stations operating in accordance with 5G or 6G. Base stations 10A to 10D respectively form cells A to D that are smaller in size than macro cells. Cells A to D may also be referred to as small cells or macro cells, etc. Figure 1 As shown, cells A to D may also be formed to be included in the macro cell.

[0053] A macro cell can generally be interpreted as a communication area with a radius of several hundred meters to several tens of kilometers covered by a base station. In addition, a small cell can also be interpreted as a general term for cells with low transmission power and covering a smaller area than a macro cell.

[0054] In addition, the base station 10 and the base stations 0A to 10D may also be expressed as gNodeB (gNB) or BS (BaseStation), etc. In addition, the terminal 20 may also be expressed as UE or MS, etc. In addition, the specific structure of the wireless communication system including the number or type of base stations and terminals is not limited to Figure 1 Example shown.

[0055] In addition, the wireless communication system is not necessarily limited to a wireless communication system that complies with 5G or 6G. For example, the wireless communication system may also be a next-generation wireless communication system of 6G, or a wireless communication system that complies with LTE.

[0056] As an example, wireless communication in accordance with 5G or 6G is performed between the base station 10 and the base stations 10A to 10D and the terminal 20. The base station 10 and the base stations 10A to 10D and the terminal 20 may also support massive MIMO (Massive MIMO) that generates a more directional beam by controlling wireless signals transmitted from a plurality of antenna elements, carrier aggregation (CA) that bundles a plurality of component carriers (CCs), dual connectivity (DC) that simultaneously communicates between the terminal 20 and two NG-RAN nodes, and IAB (Integrated Access and Backhaul) that integrates wireless backhaul between wireless communication nodes such as gNB and wireless access to the terminal 20.

[0057] In addition, the wireless communication system can also support higher frequency bands than the following frequency range (Frequency Range, FR) specified in 3GPP version 15. For example, 410MHz-7.125GHz can be supported as FR1, and 24.25GHz-52.6GHz can be supported as FR2. Furthermore, the wireless communication system can also support frequency bands exceeding 52.6GHz and up to 114.25GHz. This frequency band can also be called a millimeter wave band.

[0058] Here, the base station 10 supporting massive MIMO can transmit beams. Massive MIMO generally refers to MIMO communication using antennas with more than 100 elements, which can perform wireless communication at a higher speed than before through the multiplexing effect of multiple streams. In addition, advanced beamforming can also be performed. The beam width can be dynamically changed according to the frequency band used or the state of the terminal 20. In addition, by using a narrow beam, an increase in the received signal power based on the beamforming gain can be achieved. Furthermore, effects such as reduction in interference and effective use of wireless resources are expected.

[0059] In addition, the wireless communication system may include a wireless relay device 30. In the embodiment of the present invention, as an example, the wireless relay device 30 may be a reflector (RIS), a phase control reflector, a passive repeater, an IRS (Intelligent Reflecting Surface), etc. As a specific example of a reflector (RIS: Reconfigurable Intelligent Surface: Intelligent Metasurface), it may also be a reflector called a metamaterial reflector, a dynamic metasurface, a metasurface lens, etc. (for example, Non-Patent Document 2).

[0060] In the embodiment of the present invention, the wireless relay device 30, for example, relays a wireless signal sent from the base station 10A. In the description of the embodiment of the present invention, "relay" may refer to at least one of "reflection", "transmission", "aggregation (concentrating radio waves at approximately one point)" and "diffraction". The terminal 20 is capable of receiving the wireless signal relayed by the wireless relay device 30. Furthermore, the wireless relay device 30 may relay the wireless signal sent from the terminal 20, and may also relay the wireless signal sent from the base station 10.

[0061] As an example, the wireless relay device 30 can change the phase of the wireless signal relayed to the terminal 20. From this point of view, the wireless relay device 30 can also be called a phase variable reflector. In addition, in the present embodiment, the wireless relay device 30 sometimes has a function of relaying by changing the phase of the wireless signal, but is not limited to this. In addition, the wireless relay device 30 can also be called a repeater, a relay device, a reflect array, an IRS, or a transmission array.

[0062] In addition, in the embodiment of the present invention, the wireless relay device 30 such as RIS can also be called a battery-less device, a metamaterial functional device, an intelligent reflecting surface, a smart repeater, etc. As an example, the wireless relay device 30 such as RIS or a smart repeater can also be defined as having the functions shown in the following 1)-5).

[0063] 1) It may have a receiving function of receiving a signal sent from the base station 10. The signal may be 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 dedicated signal, etc. as a DL signal. It may also have a receiving function of receiving a signal that carries information related to the metamaterial function. In addition, it may also have a sending function of sending the signal to the terminal 20. SSB may also be a signal containing a synchronization signal and broadcast information.

[0064] 2) It may also have a function of sending a signal to the base station 10. The signal may be a PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS (Sounding Reference Signal), RIS dedicated signal, etc., which are UL signals. It may also have a function of sending information related to the metamaterial function. In addition, it may also have a function of receiving the signal from the terminal 20.

[0065] 3) It may also have a frame synchronization function with the base station 10. In addition, it may also have a frame synchronization function with the terminal 20.

[0066] 4) It may also have a reflection function of a signal sent from the base station 10 or the terminal 20. For example, the reflection function may be a function related to phase change, a function related to beam control (for example, a function related to control of TCI (Transmission Configuration Indication: Transmission Configuration Indication)-state (TCI state), QCL (Quasi Co Location: Quasi Co-location) , beam selection application, spatial filter / precoding weight selection application).

[0067] 5) It may also have a power change function of a signal transmitted from the base station 10 or the terminal 20. For example, the power change function may be power amplification.

[0068] In addition, "receiving and transmitting" and "relaying" in the wireless relay device 30 such as RIS or intelligent repeater may mean that the following function A is performed but the following function B is not performed and transmission is performed.

[0069] Function A: Apply phase shifter.

[0070] Function B: Not passing through compensation circuit (eg amplification, filter).

[0071] As another example,

[0072] Function A: Apply phase shifter and compensation circuit.

[0073] Function B: without frequency conversion.

[0074] In addition, in the wireless relay device 30 such as RIS, the amplitude may be amplified when the phase is changed. In addition, "relay" in the wireless relay device 30 such as RIS may also mean directly sending the received signal without performing layer 2 or layer 3 processing, directly sending the signal received at the physical layer, or directly sending the received signal without interpreting the signal (in this case, the phase may be changed, the amplitude may be amplified, etc.).

[0075] (Device Structure)

[0076] Next, a functional configuration example of the base station 10, the terminal 20, and the wireless relay device 30 that perform the processing and operations in the embodiment of the present invention is described. The base station 10, the terminal 20, and the wireless relay device 30 include functions for performing the embodiments described later. However, the base station 10, the terminal 20, and the wireless relay device 30 may each have only one of the functions in the embodiments.

[0077] <Base station 10>

[0078] Figure 2 FIG. 1 is a diagram showing an example of a functional configuration of the base station 10. Figure 2 As shown, the base station 10 includes a transmission unit 110 , a reception unit 120 , a setting unit 130 , and a control unit 140 . Figure 2 The functional structure shown is only an example. As long as the actions involved in the embodiments of the present invention can be performed, the functional division and the name of the functional unit can be arbitrary. The sending unit 110 and the receiving unit 120 can also be called a communication unit.

[0079] The transmitting unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher layer information from the received signals. In addition, the transmitting unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to the terminal 20. In addition, the transmitting unit 110 transmits the setting information described in the embodiment, etc.

[0080] The setting unit 130 stores the preset setting information and various setting information sent to the terminal 20 in the storage device, and reads it from the storage device as needed. The control unit 140 performs, for example, resource allocation and overall control of the base station 10. In addition, the functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120. In addition, the transmission unit 110 and the receiving unit 120 may be referred to as a transmitter and a receiver, respectively.

[0081] <Terminal 20>

[0082] Figure 3 2 is a diagram showing an example of the functional structure of the terminal 20. Figure 3 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Figure 3 The functional structure shown is only an example. As long as the actions involved in the embodiments of the present invention can be performed, the functional division and the name of the functional unit can be arbitrary. The sending unit 210 and the receiving unit 220 can also be called a communication unit.

[0083] The transmitting unit 210 generates a transmission signal according to the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly and obtains a higher layer signal from the received physical layer signal. In addition, the transmitting unit 210 sends HARQ-ACK, and the receiving unit 220 receives the setting information described in the embodiment.

[0084] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10 in the storage device, and reads it from the storage device as needed. In addition, the setting unit 230 also stores pre-set setting information. The control unit 240 performs overall control of the terminal 20, etc. In addition, 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. In addition, the transmitting unit 210 and the receiving unit 220 may be referred to as a transmitter and a receiver, respectively.

[0085] <Wireless Relay Device 30>

[0086] Figure 4 FIG. 2 is a diagram showing an example of the functional configuration of the wireless relay device 30 in the embodiment of the present invention. Figure 4 As shown, the wireless relay device 30 includes a transmitting unit 310, a receiving unit 320, a control unit 330, a variable unit 340, and an antenna unit 350. As long as the actions involved in the embodiments of the present invention can be performed, the functional distinction and the names of the functional units can be arbitrary. The transmitting unit 310 and the receiving unit 320 can also be called a communication unit.

[0087] The antenna unit 350 includes at least one antenna connected to the variable unit 340. For example, the antenna unit 350 may also be configured as an array antenna. In the embodiment of the present invention, the antenna unit 350 is sometimes particularly referred to as a relay antenna. In addition, the variable unit 340 and the antenna unit 350 may also be referred to as a relay unit.

[0088] The variable unit 340 is connected to the antenna unit 350 and can change the phase, load, amplitude, etc. For example, the variable unit 340 can also be a variable phase device, a phase shifter, an amplifier, etc. For example, by changing the phase of the radio wave reaching the relay antenna from the radio wave generation source, the direction or beam of the radio wave can be changed.

[0089] The control unit 330 is a control unit that controls the variable unit 340. In the embodiment of the present invention, the control unit 330 functions as a control unit that controls the relay state when relaying without interpreting the signal of the radio wave from the base station 10 or the terminal 20. Here, the control unit 330 can change the relay state based on the control information received from the base station 10 or the terminal 20 via the communication unit, or can change the relay state based on the reception state of the radio wave from the base station 10 or the terminal 20. For example, the control unit 330 can select an appropriate reception beam and transmission beam (direction) based on control information such as SSB, and control the variable unit 340. Similarly, the control unit 330 can also select an appropriate combination of reception direction and transmission direction based on the reception state, based on criteria such as reception quality or maximum reception power, and control the variable unit 340.

[0090] In addition, in the embodiment of the present invention, the control unit 330 can control the variable unit 340 based on information related to the propagation path between the terminal 20 or the base station 10A and the antenna unit 350 (including information estimated based on the reception state and control information. The same applies below). For example, the control unit 330 can use a well-known method such as an active repeater or RIS to change the phase of the radio wave received from the base station 10A without using transmission power, thereby relaying the radio wave to a specific direction such as the radio wave reception destination (in this case, the terminal 20). Specifically, the control unit 330 controls the variable unit 340 based on the estimated propagation path information H. PT and H RP , controlling the phase of the wireless signal so as to relay the wireless signal to the terminal 20 or the base station 10A. That is, by changing the phase of the array antenna or the like based on the same principle as beamforming, it is possible to relay radio waves in a specific direction. In addition, the wireless relay device 30 may also perform relaying in a non-powered manner by controlling (changing) only the phase of the wireless signal (radio wave) through the control unit 330 without amplifying the power of the relayed wireless signal or the like.

[0091] In addition, in the embodiment of the present invention, the control unit 330 may also obtain information according to the reception state. In addition, the receiving unit 320 may obtain control information from the base station 10A or the terminal 20. For example, the receiving unit 320 may receive various signals such as SSB transmitted from the base station 10A or the terminal 20 (including the various signals exemplified in the above functions) as control information.

[0092] In addition, the control unit 330 may estimate the propagation path information (H) between the radio wave generation source (for example, the base station 10A or the terminal 20) and the antenna unit 350 based on the reception state (for example, the change in the received power) during the control of the variable unit 340. PT and H RP ).

[0093] Specifically, the propagation path information (propagation channel information) related to each propagation path is information such as amplitude or phase, and in the embodiment of the present invention, is information estimated about the propagation path of the radio wave reaching the antenna unit 350. As an example, 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 antenna unit 350 is switched to quadrature, based on the same principle as I / Q (In-phase / Quadrature) detection.

[0094] Figure 5 FIG. 2 is a diagram showing an operation example of the wireless relay device 30 in the embodiment of the present invention. Figure 5As shown, as an example, the wireless relay device 30 is interposed between the base station 10A (or other base stations 10, etc.) and the terminal 20, and relays (reflects, transmits, collects, diffracts, etc.) wireless signals transmitted and received between the base station 10A and the terminal 20.

[0095] As a specific example, when the wireless quality is good, the base station 10A and the terminal 20 directly transmit and receive wireless signals without passing through the wireless relay device 30. On the other hand, when the wireless quality deteriorates due to the presence of an obstruction between the base station 10A and the terminal 20, the wireless relay device 30 relays the wireless signals transmitted and received between the base station 10A and the terminal 20.

[0096] Specifically, the wireless relay device 30 estimates the propagation path information H between the radio wave generation source such as the base station 10A or the terminal 20 and the relay antenna based on the change in the received power when the variable unit 340 such as the variable phase shifter is controlled. PT , H RT , and based on the estimated propagation path information, the variable unit 340 such as the variable phase shifter is controlled, thereby relaying the wireless signal to the radio wave receiving destination such as the terminal 20. In addition, the estimated propagation path information H is not limited to PT , H RT The wireless relay device 30 may also control the variable unit 340 such as a variable phase shifter based on the control information received from the base station 10A or the terminal 20, thereby relaying the wireless signal to the radio wave receiving destination such as the base station 10A or the terminal 20.

[0097] Here, the propagation path or propagation channel is each communication path of wireless communication, and here is the communication path between each transmitting and receiving antenna (such as the base station antenna and terminal antenna in the figure).

[0098] As an example, the wireless relay device 30 includes: an antenna unit 350, which has a small multi-element antenna that supports large-scale MIMO; and a variable unit 340, which has a variable phase shifter or phase shifter that changes the phase of a wireless signal (essentially an electric wave) to a specific phase. The wireless relay device 30 uses the variable unit 340 to control the phase of the electric wave relayed to the terminal 20 or the base station 10A.

[0099] Figure 6 is a diagram showing an example of communication in a high frequency band. Figure 6As shown, when using a high frequency band of several GHz to tens of GHz or more, a blind spot is easily generated due to the strong straightness of the radio waves. When the base station 10A and the terminal 20 can see each other, even when using this high frequency band, the wireless communication between the base station 10A and the terminal 20 will not be affected. On the other hand, for example, when the view between the base station 10A and the terminal 20 is blocked by an obstruction such as a building or a tree, the wireless quality is greatly degraded. That is, when the terminal 20 moves to a blind spot blocked by an obstruction, the communication may be interrupted.

[0100] Considering the existence of applications (remote operation, etc.) that effectively utilize high-speed, large-capacity, and low-delay characteristics, it is important to eliminate blind spots and ensure the connection between base stations and terminals without interrupting communications within the wireless communication system.

[0101] Therefore, a technology has been developed that can relay radio waves between the base station 10A and the terminal 20, such as radio wave propagation control devices such as RIS or intelligent repeaters. In this way, by controlling the propagation characteristics of base station signals, communication characteristics can be improved, and without requiring a signal source, coverage can be expanded, and installation and operation costs based on additional base stations can be reduced.

[0102] In the past, there are passive and active types of radio wave propagation control devices. The passive type has the advantage of not requiring control information, but cannot follow moving objects or environmental changes. On the other hand, the active type has the disadvantage of requiring control information and increasing overhead, but it can change the load (phase) state of the control antenna to variably control the propagation characteristics of the radio wave, and can also follow moving objects and environmental changes.

[0103] There are two types of active wave propagation control devices and control methods, namely feedback (FB) specification and propagation path information specification. In the FB specification, the variable type wave propagation control device is fed back by the terminal 20 etc. to randomly change the communication state of the load (phase) state, and searches for the best condition. On the other hand, in the propagation path information specification, the load state can be determined based on the propagation path information between the base station and the wave propagation control device, and the best wave propagation control can be performed. In the embodiment of the present invention, either type can be applied.

[0104] In addition, as relay methods, there are types such as reflection, transmission, diffraction, and aggregation, but in this embodiment, as an example, the following describes the structural examples of the reflection type and the transmission type (for the diffraction type and the aggregation type, refer to non-patent document 2, etc.).

[0105] Figure 7 FIG. 2 is a diagram showing an example of a reflective type wireless relay device 30 in an embodiment of the present invention. Figure 7 An example of the system configuration of the reflection-type wireless relay device 30 will be described. Figure 7 1 is a diagram showing the relationship between the transmission antenna Tx of the base station 10A, etc., the relay antenna Sx of the transmission type wireless relay device 30, and the reception antenna Rx of the terminal 20, etc. Figure 7 As shown, in an embodiment of the present invention, taking MIMO as an example, there are multiple propagation paths between Tx-Sx and multiple propagation paths between Sx-Rx, and the wireless relay device 30 controls the variable unit 340 including a variable phase shifter having a relay antenna Sx to relay radio waves.

[0106] like Figure 7 As shown in FIG. 1 , in the case of the reflection type, the array-shaped relay antennas are arranged facing the same direction. Thus, the propagation path of the relay antenna can be estimated based on the reception state observed when the multiple phase conditions of the relay antenna are changed.

[0107] Figure 8 FIG. 1 is a diagram showing an example of a transmission-type wireless relay device 30 in an embodiment of the present invention. Figure 8 An example of the system configuration of the transmission-type wireless relay device 30 will be described. Figure 8 1 is a diagram showing the relationship between the transmission antenna Tx of the base station 10A, etc., the relay antenna Sx of the transmission type wireless relay device 30, and the reception antenna Rx of the terminal 20, etc. Figure 8 As shown, in an embodiment of the present invention, taking MIMO as an example, there are multiple propagation paths between Tx-Sx and multiple propagation paths between Sx-Rx. As shown in the figure, the wireless relay device 30 relays the radio waves arriving from one side to the other side via a variable portion 340 such as a variable phase shifter of the relay antenna Sx. In this way, in the case of the transmission type, the reference antenna on the left side of the figure and the relay antenna on the right side of the figure are respectively configured in a pair facing opposite directions in a manner that can relay the radio waves arriving from one side to the other side. It can also be configured so that whether it is a transmission type or a reflection type, the power reaching the relay antenna can be detected by a power detector, etc. to measure the receiving state. In addition, the propagation path of the relay antenna can be estimated based on the received signal observed when the multiple phase conditions of the relay antenna are changed.

[0108] For example, in future networks such as 6G, higher quality than 5G is required. For example, ultra-high speed of T level (tera bps level), high reliability and low latency of optical communication level, etc. are required. In addition, ultra-coverage extension, ultra-long distance communication, ultra-reliability communication, virtual cells, flexible networks, mesh networks, enhancement of side links, and design considering RIS or smart repeaters are required.

[0109] In order to achieve this quality, it is envisioned to use very high frequencies, such as terahertz waves. For example, when using very high frequencies such as terahertz waves, the advantages are envisioned to be high speed due to the use of ultra-wideband and low latency due to the shortened symbol length, but it is also envisioned that there are disadvantages such as narrow coverage due to a large attenuation rate and reduced reliability due to high straightness. For each location where 6G communication is required, it is required to study how to ensure redundancy, that is, how to increase the number of transmission points for communication.

[0110] As described above, RIS reflects or transmits the beam transmitted from the base station 10 or the terminal 20 in a predetermined direction and delivers it to the terminal 20 or the base station 10. Passive RIS is a device that does not change the reflection angle or beam width according to the position of the mobile station. It does not require control information, but it is difficult to perform precise beam control. Active RIS is a device that changes the reflection angle and beam width according to the position of the mobile station. It can perform precise beam control, but because it requires control information, the overhead increases. RIS can increase the number of transmission points for communication.

[0111] In addition, RIS may be any of the names shown in 1) to 5) below, but is not limited thereto.

[0112] 1) Battery less device

[0113] 2) Metamaterial functional devices

[0114] 3) Intelligent reflecting surface

[0115] 4) Smart repeater

[0116] 5) Network-controlled repeater

[0117] The RIS may be any device as long as it has a predetermined function. The predetermined function may be, for example, at least one of the following 1) and 2).

[0118] 1) UE functions

[0119] A receiving function for receiving signals sent from the base station 10 (e.g., DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, RIS dedicated signals). Through this receiving function, information related to the following 2) metamaterial function can be received. A transmitting function for sending signals to the base station 10 (e.g., UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signals). Through this transmitting function, information related to the following 2) metamaterial function can also be sent. A frame synchronization function with the base station 10.

[0120] 2) Metamaterial Functions

[0121] Function of reflecting the signal sent 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 reflective elements of the RIS, or by making a common phase change through the multiple reflective elements. Functions related to beam control (e.g., functions related to the control of TCI-state and QCL, the selection and application of beams, the selection and application of spatial filters / precoding weights). Function of changing the power of the signal sent from the base station 10 or the terminal 20 (e.g., power amplification). The power may be changed differently for each reflective element of the RIS, or by making a common power change through the multiple reflective elements.

[0122] The "receive and transmit" in RIS can also refer to reflected radio waves / signals. The terms "base station" and "terminal" are used below, but are not limited to these and can also be replaced by communication devices. RIS can also be replaced by smart repeaters, repeaters, etc.

[0123] For example, RIS may also operate according to the assumptions shown in the following 1)-6).

[0124] 1) Network operators set up RIS

[0125] 2)RIS is fixed and does not move

[0126] 3)RIS only relays signals from one base station

[0127] 4) Capable of receiving and sending control signals

[0128] 5) Operate in half-duplex mode

[0129] 6) Single RIS environment

[0130] Here, a network-controlled repeater is being studied as a wireless relay device controlled by the network. A network-controlled repeater is different from a conventional amplification and forwarding repeater in that, for example, the network can control the beam, timing, DL or UL, ON or OFF, and transmission power. Hereinafter, a "network-controlled repeater" is also referred to as a "repeater".

[0131] The network controlled repeater is used as an in-band RF repeater to extend the coverage in the FR1 and FR2 bands. In particular, it is envisioned that FR2 is used in outdoor scenarios and O2I (outdoor to indoor) scenarios. For example, a single-hop and non-mobile environment can also be envisioned as an environment for the network controlled repeater. In addition, the network controlled repeater can also be transparent to the UE. In addition, the network controlled repeater is able to maintain the gNB-repeater link and the repeater-UE link at the same time.

[0132] The following research has been conducted on the side control information (Side control information) for controlling the network control repeater from the network.

[0133] Information related to beamforming

[0134] Information related to the timing of sending or receiving

[0135] Information related to UL-DL TDD settings

[0136] ON-OFF information for interference control and power saving

[0137] Power control for interference control

[0138] In addition, side control information based on L1 and L2 signaling is being studied. In addition, identification and authentication of network controlled repeaters is being studied.

[0139] Fig. 9 FIG. 1 is a diagram showing an example of a network-controlled repeater in an embodiment of the present invention. A network-controlled repeater (NCR) can be Fig. 9 The network control repeater is also described as NCR below. NCR-MT (Mobile Termination) can be defined as a device having the function of communicating with the base station 10 via a control link (Control link, C-link). For example, it is possible to exchange side control information via the control link. The control link can also be based on the NR-Uu interface.

[0140] NCR-Fwd (Forwarding) can be defined as a device having the following functions: 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 action of NCR-Fwd can be controlled based on the side control information received from the base station 10. Fig. 9 As shown, the backhaul link corresponds to the communication between the base station 10 and the NCR-Fwd, and the access link corresponds to the communication between the terminal 20 and the NCR-Fwd.

[0141] In FR2, information related to the beam is useful. For example, in order to control at least the action of the NCR 30 in the access link, information related to the beam can be recommended through the side control information. For example, the beam applied to the access link can be notified by the beam index or by the index of the source RS (e.g., an indicator such as TCI).

[0142] For the beams used by NCR-Fwd for the backhaul link, the same TCI state as that for NCR-MT for the control link can be assumed.

[0143] Hereinafter, embodiments of the present invention will be briefly described.

[0144] 1) Method for setting the UL receive beam of the access link of NCR-Fwd

[0145] Can notify multiple consecutive gNBs to send beam IDs

[0146] It is also possible to notify a gNB to send a beam ID and set the same beam ID continuously.

[0147] It is also possible to periodically set multiple consecutive gNB transmission beam IDs

[0148] It is also possible to notify a gNB to send a beam ID and set the same beam ID periodically and continuously.

[0149] You can also refer to the TCI status of DCI 0_x (the repeater needs to decode the DCI for the UE)

[0150] The TCI state of the CG-PUSCH configuration / activation can be used, and it can also be specified for the relay

[0151] Can utilize 3GPP Release 17 TCI status

[0152] 2) Method for setting the beam of the access link of NCR-Fwd

[0153] Can set the candidate beams for the access link of NCR-Fwd and set the final beam to be used from the candidate beams

[0154] You can also first set the candidate beams for the access link of NCR_Fwd, and then set some of the candidate beams.

[0155] NCR can report candidate beams and set the beam to be used from the reported candidate beams

[0156] NCR can report candidate beams and set a subset of candidate beams from the reported candidate beams

[0157] NCR can report candidate beams, set candidate beams from the reported candidate beams, and then set a portion of the candidate beams

[0158] 3) Details of the beam setting method for NCR-Fwd access link

[0159] Candidate beams for 2) above

[0160] Alt.1: DL / UL common

[0161] Alt.2: Different for each DL / UL

[0162] The beam index reported by the NCR in 2) above

[0163] Alt.1: DL / UL common

[0164] Alt.2: Different for each DL / UL

[0165] The set of candidate beams and the subset of candidate beams in 2) above

[0166] Alt.1: The set of candidate beams and the subset of candidate beams are both DL / UL common

[0167] Alt.2: The set of candidate beams is common to DL / UL, and the subset of candidate beams is different for each DL / UL

[0168] Alt.3: The set of candidate beams and the subset of candidate beams are different for each DL / UL

[0169] 4-1) The DL receiving beam of the NCR-Fwd backhaul link can be determined by any of the following methods:

[0170] 4-2) The UL transmission beam of the NCR-Fwd backhaul link can be determined by any of the following methods:

[0171] · In the case of time resources where NCR-MT and NCR-Fwd are operating at the same time, follow NCR-MT

[0172] In the case of time resources where NCR-MT and NCR-Fwd do not operate at the same time, the method for determining the beam of NCR_Fwd is specified

[0173] 5) When using the Rel-17 unified TCI framework, similar to 4-1 / 4-2 above, the resources that operate simultaneously follow the TCI status of NCR-MT, and the resource determination method for simultaneous operation is not specified.

[0174] Here, it is not clear how to control the UL receive beam of NCR-Fwd.

[0175] Therefore, the UL receiving beam transmitted by the NCR 30 may be set as follows.

[0176] <Action 1>

[0177] The NCR 30 may consider at least one of the following options as a method of setting the UL reception beam for each time unit.

[0178] <Option 1>

[0179] Fig.10 This is a diagram for explaining example (1) of a UL reception beam in an embodiment of the present invention.

[0180] The NCR 30 may also assume that a sequence of UL reception beam IDs is specified and applied to a sequence of time units. Each beam ID is applied to each time unit.

[0181] 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.

[0182] In addition, the start time or the length of time may also be predefined. For example, the NCR 30 may assume a predefined offset from receiving the beam indication or start from a predefined length of time unit. In addition, the NCR 30 may also assume that the sequence of time units is indicated as a sequence of time unit IDs.

[0183] <Option 2>

[0184] Fig.11 This is a diagram for explaining example (2) of a UL receive beam in an embodiment of the present invention.

[0185] The NCR 30 may also assume that a UL receive beam ID is assigned and applied to a series of time units. The NCR 30 may assume that the sequence of time units is represented as the number of consecutive time units by indicating the starting time unit and the length of the time unit.

[0186] In addition, the start time or the length of time may also be predefined. For example, the NCR 30 may envision starting from a predefined offset from the receipt of the beam indication or from a predefined length of time unit, or applying to a new beam indication. In addition, the NCR 30 may also envision indicating the sequence of time units as a sequence of time unit IDs.

[0187] <Option 3>

[0188] Fig.12 This is a diagram for illustrating example (3) of a UL receive beam in an embodiment of the present invention.

[0189] The NCR 30 may also assume a pattern indicated with periodicity. The NCR 30 may also assume a period and an offset indicated. In addition, the NCR 30 may also assume that a sequence of UL reception beam IDs is represented by each beam ID applied in each time unit of the periodicity.

[0190] <Option 4>

[0191] Fig.13 This is a diagram for illustrating example (4) of a UL receive beam in an embodiment of the present invention.

[0192] It is also conceivable that the NCR 30 is indicated with a periodic pattern. It is also conceivable that the NCR 30 is indicated with a period and an offset. In addition, it is also conceivable that the NCR 30 is indicated with a UL receive beam ID and applied to a periodic series of time units.

[0193] The NCR 30 may envision that the sequence of time units is represented as a starting time unit and a length of the time unit, thereby being represented as a number of consecutive time units.

[0194] In addition, NCR 30 may also assume that the start time or the length of time is predefined. For example, NCR 30 may start applying the UL receive beam from a predefined offset or a predefined length of time unit from the receipt of the beam indication. In addition, NCR 30 may assume that the time unit sequence is represented as a time unit ID sequence.

[0195] Fig.14 is a diagram for explaining an example (5) of a UL receiving beam in an embodiment of the present invention. NCR 30 may also assume the following situation: Fig.13 In the case where the time unit of the beam is not indicated, Fig.13 The beams shown are indicated separately, e.g. Fig.14 The beams are indicated as shown.

[0196] <Option 5>

[0197] 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 (DCI format 0_X) may be a field indicating a UL reception beam ID.

[0198] The NCR 30 may assume that the indicated UL reception beam ID and the corresponding UL reception beam are applied to the time slot / symbol shown in the allocation field of the time domain resources of the PUSCH scheduling DCI (DCI format 0_X).

[0199] In addition, when NCR 30 considers that it is sometimes not necessary to send PUSCH, it only needs to amplify and forward the UL signal sent from the base station 10. When receiving PUSCH scheduling DCI (DCI format 0_X), the base station 10 can also instruct NCR 30 to forward only the UL signal from the terminal 20. The base station 10 and NCR 30 can also assume that PUSCH is not sent in the resources indicated by DCI through the following method.

[0200] When one or more conventional fields (or new fields) of DCI are set to predefined values, NCR 30 may forward only UL signals from terminal 20 to base station 10 in the slots / symbols indicated by DCI. That is, NCR 30 may not transmit PUSCH in the resources indicated by DCI.

[0201] Alternatively, when NCR 30 detects DCI in a specific RNTI / SS set / CORESET, it may forward only the UL signal from terminal 20 to base station 10 in the time slot / symbol indicated by DCI, and NCR 30 may not send PUSCH in the resources indicated by DCI.

[0202] In addition, a new DCI format may be introduced. The new DCI format includes, for example, a field similar to the SRI field of the PUSCH scheduling DCI (DCI0_X) indicating the UL reception beam ID.

[0203] The new DCI format includes, for example, a field similar to the time domain allocation field of the PUSCH scheduling DCI (DCI0_X), which indicates the applicable time (time slot offset, symbol position within the time slot) of the specified UL reception beam ID.

[0204] <Option 6>

[0205] The NCR 30 may also be reused by assuming that the CG (Confitured Grant) setting / activation is performed.

[0206] The SRI field or a new field of the CG setting (RRC) or the CG activation DCI indicates the UL reception beam ID. The NCR 30 may assume that the indicated UL reception beam ID and the corresponding UL reception beam are applied to the time slot / symbol indicated by the CG setting (RRC) and the CG activation DCI.

[0207] In addition, if the case where the NCR 30 does not need to send the PUSCH is considered, then upon receiving the CG setting / activation, the NCR 30 only amplifies the UL signal from the terminal 20 and forwards it to the base station 10 in the case of one or more previous fields (or new fields). In the case where the CG setting or CG activation DCI is set to a pre-defined value, in the time slot / symbol set by the CG setting (RRC) and the CG activation DCI, the NCR 30 may only forward the UL signal from the terminal 20 to the base station 10 without sending the PUSCH in the resource.

[0208] In addition, NCR 30 may assume that new RRC settings and activation DCI similar to CG settings / activations are introduced. A field indicating the UL receive beam ID may be included in the new RRC settings or DCI.

[0209] The new RRC setting or DCI may include a field indicating the applicable time (period, slot offset, symbol position within a slot) of the specified UL receive beam ID.

[0210] <Option 7>

[0211] NCR 30 may assume that the unified TCI status indication DCI of 3GPP Release 17 is reused. The TCI status field of the unified TCI status indication of 3GPP Release 17 or the new field DCI may indicate the UL receive beam ID.

[0212] The NCR 30 may assume that the indicated UL reception beam ID and the corresponding UL reception beam are applied starting from at least X slots / symbols after the last slot / symbol of the PUCCH transmitting the HARQ-ACK of the DCI, that is, the first symbol / slot.

[0213] Furthermore, the NCR 30 may be applied starting from at least X slots / symbols after the slot / symbol in which the DCI is received, that is, from the first symbol / slot.

[0214] X can be set as an object of predefined / set / capability information. In addition, NCR 30 can also be assumed to be introduced into a new DCI format. In the new DCI format, for example, a field identical to the TCI status field of the unified TCI status indication DCI of version 17 indicating the UL receive beam ID can be included. The application time of the beam indication in this case can also be the same as above.

[0215] In the above options, the time unit can be a time slot, a codeword, a time slot group, a codeword group, a sub-time slot, etc.

[0216] A plurality of the above options may be supported. The NCR 30 may be configured to apply one or more options. The NCR 30 may be configured to report one or more supported options as capability information of the NCR 30. Each option may be defined as a required or optional function.

[0217] In the above options, multiple UL reception beam IDs may be indicated in time units. In addition, in the above options, multiple UL reception beam IDs may be indicated in time units for multiple frequency domain resource units.

[0218] According to the above-mentioned operation, the NCR 30 can appropriately set the UL reception beam in the access link.

[0219] The UL reception beam refers to the beam used by NCR-Fwd for access link, and is used to receive the signal from UE 20. The UL reception beam used by NCR-Fwd can be notified by the following methods 1) to 4), for example.

[0220] 1) Beam Index

[0221] The beam index can directly refer to the spatial filter of NCR-Fwd for UL reception in the access link. Different beam indices can refer to different spatial filters.

[0222] 2) Index of source RS

[0223] The source RS for UL reception for NCR-Fwd may also be newly defined as a resource category. Each source RS for UL reception for NCR-Fwd may be configured in a certain time resource notified to the base station 10. In each source RS for UL reception for NCR-Fwd, the NCR 30 amplifies and forwards the UL signal between the terminal 20 and the base station 10.

[0224] That is, when the source RS for UL reception for NCR-Fwd is notified for a certain unit time, NCR-Fwd may also apply or use the same spatial domain filter for the UL reception of the access link in the time unit and the UL reception in the notified source RS for UL reception for NCR-Fwd. The definition details of the source RS for UL reception for NCR-Fwd will be described later.

[0225] 3) Indicators like TCI

[0226] The TCI state of NCR-Fwd can be associated with the source RS for UL reception of NCR-Fwd described in 2) above. When an index representing the TCI state of NCR-Fwd is notified for a certain time unit, NCR-Fwd can apply or use the same spatial domain filter for the UL reception of the access link of the time unit and for the UL reception in the source RS for UL reception of NCR-Fwd associated with the notified TCI state of NCR-Fwd.

[0227] 4) Index of the beam of the base station 10 (e.g., CSI-RS or SSB index, or index of the TCI state associated with the CSI-RS or SSB of the base station 10)

[0228] The UL reception beam or spatial domain filter of NCR-Fwd may be associated with the beam of the base station 10. When the index of the beam of the base station 10 is notified for a certain unit time, NCR-Fwd may apply or use the beam or spatial domain filter associated with the beam of the base station 10 for the UL reception of the access link for the time unit.

[0229] An example of defining the source RS for UL reception of NCR-Fwd of the NCR 30 will be described below.

[0230] The "source RS for UL reception for NCR-Fwd" may be a newly defined type of resource for beam management of the NCR 30. Each "source RS for UL reception for NCR-Fwd" is a set of time domain resources. In each "source RS for UL reception for NCR-Fwd", the NCR 30 may also amplify the UL signal and forward it from the terminal 20 to the base station 10. Each "source RS for UL reception for NCR-Fwd" may sometimes occupy a plurality of adjacent symbols.

[0231] The candidate numbers supported by adjacent codewords may be pre-defined, for example, selected from {1, 2, 4, 8, 10, 12, 14}.

[0232] It is also possible to assume that a plurality of “source RSs for UL reception of NCR-Fwd” are set for the NCR 30. The maximum number of supported resources may be defined in advance or may be an object of the capability information of the NCR 30.

[0233] NCR 30 may also be configured with a source RS set for UL reception of NCR-Fwd. Each resource set may be composed of multiple source RSs for UL reception of NCR-Fwd. The maximum number of supported resource sets may be predefined or may be an object of capability information of NCR 30.

[0234] The maximum number of resources supported by a resource set may be predefined or may be an object of the capability information of the NCR 30 .

[0235] The NCR 30 may also assume that the following parameters are set for each source RS for UL reception of NCR-Fwd set by side control information (RRC / MAC-CE / DCI).

[0236] Resource ID / resource set ID

[0237] Actions in the time domain, i.e. resources / resource sets with resource type = {periodic, semi-persistent, aperiodic}

[0238] The lifecycle of a resource / resource set (in the case of P / SP resources / resource sets)

[0239] Slot level offset of resources / resource sets

[0240] The symbol position of the resource in the time slot (including the starting symbol and the number of symbols)

[0241] Uplink transmit beams in each resource

[0242] In the case of semi-persistent resources / resource sets, the NCR 30 can be activated / deactivated by side control information (RRC / MAC-CE / DCI). The NCR 30 can also use it to forward UL signals from the terminal 20 to the base station 10 when the uplink transmission beam represented by the resource is activated. In the case of deactivation, it is not necessary to forward.

[0243] It is conceivable that the side control information includes resource set ID / resource ID and activation / deactivation instructions.

[0244] In the case of non-periodic resources / resource sets, NCR 30 can assume that the resources / resource sets are triggered by side control information (RRC / MAC-CE / DCI). In addition, NCR 30 can also forward UL signals from terminal 20 to base station 10 using the uplink transmission beam represented by the resources when triggered.

[0245] The NCR 30 may assume that the resource ID / resource set ID is included in the side control information. Alternatively, the NCR 30 may assume that the trigger state is included in the side control information. The NCR 30 may assume that the trigger state is set for each resource / resource set.

[0246] NCR 30 can assume that the time slot offset and the symbol position of the resource in the time slot (including the start symbol and the number of symbols) are indicated by the control information on the triggering side.

[0247] According to the above-mentioned operation 1, the UL reception beam can be controlled based on the source RS of the UL reception of the NCR-Fwd for the NCR 30.

[0248] The capabilities of the NCR shown in the following 1) and 2) can be defined.

[0249] 1) Whether to support UL receive beam of NCR-Fwd controlled by network

[0250] 2) Number of UL receive beams supported by NCR-Fwd

[0251] Action 1 described above may be applied only when the NCR 30 supports the above capability and the base station 10 activates the feature.

[0252] <Action 2>

[0253] As described above, the beam of the NCR-Fwd in the access link can be notified by the beam index or the index of the source RS. It is necessary to decide how to set the candidate set of the beam of the NCR-Fwd in the access link.

[0254] For example, the beam of NCR-Fwd in the access link can be notified from the candidate set of beams. For example, the candidate set of DL transmission beams of NCR-Fwd in the access link and the candidate set of UL reception beams of NCR-Fwd in the access link can be common or separate.

[0255] For the DL transmission beam of NCR-Fwd in the access link and the UL reception beam of NCR-Fwd in the access link, the operations can be as shown in A)-E).

[0256] A) The set of candidate beams can be notified via RRC signaling (hereinafter, RRC signaling is also referred to as RRC), MAC-CE and / or DCI. The DL transmit beam of the NCR-Fwd in the access link or the UL receive beam of the NCR-Fwd in the access link can be notified from the above-notified set of candidate beams via RRC, MAC-CE and / or DCI.

[0257] B) The set of candidate beams can be notified through RRC and MAC-CE, can be notified through MAC-CE and DCI, can be notified through RRC and DCI, or can be notified through RRC, MAC-CE and DCI.

[0258] In the case of notification through RRC and MAC-CE, the set of candidate beams can be notified through RRC. A subset of candidate beams can be notified through MAC-CE from the set of candidate beams notified by RRC. The DL transmission beam of NCR-Fwd in the access link or the UL reception beam of NCR-Fwd in the access link can be notified, for example, through MAC-CE from the subset of candidate beams notified by MAC-CE. In addition, NCR 30 can also determine the DL transmission beam of NCR-Fwd in the access link or the UL reception beam of NCR-Fwd in the access link from the subset of candidate beams notified by MAC-CE.

[0259] In the case of notification by MAC-CE and DCI, the set of candidate beams can be notified by MAC-CE. A subset of candidate beams can be notified by DCI from the set of candidate beams notified by MAC-CE. The DL transmission beam of NCR-Fwd in the access link or the UL reception beam of NCR-Fwd in the access link can be notified, for example, by DCI from the subset of candidate beams notified by DCI. In addition, NCR 30 can also determine the DL transmission beam of NCR-Fwd in the access link or the UL reception beam of NCR-Fwd in the access link from the subset of candidate beams notified by DCI.

[0260] In the case of notification by RRC and DCI, the set of candidate beams may be notified by RRC. A subset of candidate beams may be notified by DCI from the set of candidate beams notified by RRC. A DL transmit beam of NCR-Fwd in the access link or a UL receive beam of NCR-Fwd in the access link may be notified, for example, by DCI from the subset of candidate beams notified by DCI. In addition, NCR 30 may also determine a DL transmit beam of NCR-Fwd in the access link or a UL receive beam of NCR-Fwd in the access link from the subset of candidate beams notified by DCI.

[0261] In the case of notification through RRC, MAC-CE and DCI, the set of candidate beams can be notified through RRC. A subset of candidate beams can be notified through MAC-CE from the set of candidate beams notified by RRC. A sub-subset of candidate beams can be notified through DCI from the subset of candidate beams notified by MAC-CE. The DL transmit beam of NCR-Fwd in the access link or the UL receive beam of NCR-Fwd in the access link can be notified, for example, through DCI from the sub-subset of candidate beams notified by DCI. In addition, NCR 30 can also determine the DL transmit beam of NCR-Fwd in the access link or the UL receive beam of NCR-Fwd in the access link from the subset of candidate beams notified through DCI.

[0262] C) A set of candidate beams may be reported to the base station 10 through the NCR 30. A DL transmission beam of the NCR-Fwd in the access link or a UL reception beam of the NCR-Fwd in the access link may be notified from the set of candidate beams reported by the NCR 30.

[0263] D) The set of candidate beams may be reported to the base station 10 through the NCR 30. A subset of candidate beams may be notified through RRC, MAC-CE, or DCI from the set of candidate beams reported by the NCR 30. A DL transmission beam of the NCR-Fwd in the access link or a UL reception beam of the NCR-Fwd in the access link may be notified from the subset of candidate beams notified by RRC, MAC-CE, or DCI.

[0264] E) A set of candidate beams may be reported to the base station 10 through the NCR 30. From the set of candidate beams reported by the NCR 30, a subset of candidate beams may be notified through RRC and MAC-CE, may be notified through MAC-CE and DCI, may be notified through RRC and DCI, or may be notified through RRC, MAC-CE, and DCI. A DL transmit beam of the NCR-Fwd in the access link or a UL receive beam of the NCR-Fwd in the access link may be notified from the subset of candidate beams notified by RRC, MAC-CE, or DCI.

[0265] In the above A)-E), the maximum number of candidate beams set by RRC, the maximum number of candidate beams activated by MAC-CE, or the maximum number of candidate beams reported by NCR 30 may be predefined or may be determined depending on the capability of NCR 30. The maximum number of DL transmit beams of NCR-Fwd in the access link and the maximum number of UL receive beams of NCR-Fwd in the access link may be different.

[0266] Fig.151 is a diagram for explaining an example (1) of a beam used in an access link according to an embodiment of the present invention. Fig.15 As shown, a set of beams that are commonly candidates for the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam can be notified to the NCR 30 via RRC, MAC-CE and / or DCI. Any beam in the candidate beam set can be used for both the DL transmission beam of the NCR-Fwd access link and the UL reception beam of the NCR-Fwd access link. In addition, Fig.15 The actions shown can also be applied to A) above and D) above.

[0267] Fig.16 2 is a diagram for explaining example (2) of a beam used in an access link according to an embodiment of the present invention. Fig.16 As shown, the set of candidate beams for the DL transmission beam of the NCR-Fwd access link and the set of candidate beams for the UL reception beam of the NCR-Fwd access link can be separated and notified to the NCR 30 via RRC, MAC-CE and / or DCI respectively. Any beam in the set of candidate beams for the DL transmission beam of the NCR-Fwd access link can be used as the DL transmission beam of the NCR-Fwd access link. Any beam in the set of candidate beams for the UL reception beam of the NCR-Fwd access link can be used as the UL reception beam of the NCR-Fwd access link. In addition, Fig.16 The actions shown can also be applied to A) above and D) above.

[0268] Fig.17 3 is a diagram for explaining an example (3) of a beam used in an access link according to an embodiment of the present invention. Fig.17 As shown, the candidate beam set reported by NCR 30 for both the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam can be notified to NCR 30 via RRC, MAC-CE and / or DCI. Any beam in the candidate beam set can be used for both the DL transmission beam of the NCR-Fwd access link and the UL reception beam of the NCR-Fwd access link. In addition, Fig.17 The actions shown can also be applied to the above C), the above D) and the above E).

[0269] Fig.18 4 is a diagram for explaining example (4) of a beam used in an access link according to an embodiment of the present invention. Fig.18As shown, the candidate beam set reported by NCR 30 for the DL transmission beam of the NCR-Fwd access link and the candidate beam set reported by NCR 30 for the UL reception beam of the NCR-Fwd access link can be separated and notified to NCR 30 via RRC, MAC-CE and / or DCI respectively. Any beam in the candidate beam set for the DL transmission beam of the NCR-Fwd access link can be used for the DL transmission beam of the NCR-Fwd access link. Any beam in the candidate beam set for the UL reception beam of the NCR-Fwd access link can be used for the UL reception beam of the NCR-Fwd access link. In addition, Fig.18 The actions shown can also be applied to the above C), the above D) and the above E).

[0270] Fig.19 5 is a diagram for explaining an example of a beam used in an access link according to an embodiment of the present invention. Fig.19 As shown, a candidate beam set for both the DL transmission beam of the NCR-Fwd access link and the UL reception beam of the NCR-Fwd access link can be notified to the NCR 30 via RRC or MAC-CE. Any beam in the candidate beam set can be used for both the DL transmission beam of the NCR-Fwd access link and the UL reception beam of the NCR-Fwd access link.

[0271] Furthermore, a portion of the beams in the candidate beam set may be notified to the NCR 30 as a subset of the candidate beams via MAC-CE or DCI. Any beam in the candidate beam subset may be used for both the DL transmission beam of the NCR-Fwd access link and the UL reception beam of the NCR-Fwd access link. In addition, the signaling may use all of RRC, MAC-CE, and DCI. In addition, Fig.19 The actions shown can also be applied to B) above and E) above.

[0272] Fig. 20 FIG. 6 is a diagram for explaining an example (6) of a beam used in an access link according to an embodiment of the present invention. Fig. 20 As shown, a set of beams that are commonly candidates for the NCR-Fwd access link DL transmission beam and the NCR-Fwd access link UL reception beam can be notified to the NCR 30 via RRC or MAC-CE. Any beam in the candidate beam set can be used for both the DL transmission beam of the NCR-Fwd access link and the UL reception beam of the NCR-Fwd access link.

[0273] Furthermore, the candidate beam subset for the DL transmission beam of the NCR-Fwd access link and the candidate subset for the UL reception beam of the NCR-Fwd access link may be separated and notified to the NCR 30 as part of the beams in the set of candidate beams via MAC-CE or DCI. Any beam in the candidate beam subset 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 in the candidate beam subset 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. In addition, signaling may use all of RRC, MAC-CE, and DCI. In addition, Fig. 20 The actions shown can also be applied to B) above and E) above.

[0274] Fig.21 7 is a diagram for explaining an example of a beam used in an access link according to an embodiment of the present invention. Fig.21 As shown, the set of candidate beams for the DL transmission beam of the NCR-Fwd access link and the set of candidate beams for the UL reception beam of the NCR-Fwd access link can be separated and notified to the NCR 30 via RRC or MAC-CE respectively. Any beam in the set of candidate beams for the DL transmission beam of the NCR-Fwd access link can be used for the DL transmission beam of the NCR-Fwd access link. Any beam in the set of candidate beams for the UL reception beam of the NCR-Fwd access link can be used for the UL reception beam of the NCR-Fwd access link.

[0275] Furthermore, a part of the set of candidate beams for DL ​​transmission beams of the NCR-Fwd access link may be notified to the NCR 30 as a subset of the DL transmission candidate beams of the NCR-Fwd access link via MAC-CE or DCI. A part of the set of candidate beams for UL reception beams of the NCR-Fwd access link may be notified to the NCR 30 as a subset of the candidate beams for UL reception beams of the NCR-Fwd access link via MAC-CE or DCI. In addition, the signaling may use all of RRC, MAC-CE, and DCI. In addition, Fig.21 The actions shown can also be applied to B) above and E) above.

[0276] As described above, the index of the UL reception beam of NCR-Fwd may be an index of a beam, an index of a source RS, or an index of a TCI state.

[0277] The index of the DL transmission beam of NCR-Fwd can be the index of the beam, the index of the source RS, or the index of the TCI state. The source RS can be a newly defined RS for managing the DL transmission beam of NCR-Fwd. The source RS can be used as a reference for the spatial domain filter of NCR 30. Each source RS can occupy a predetermined time domain resource notified from the base station 10. NCR 30 amplifies and forwards each source RS from the base station 10 to the terminal 20. When the source RS is notified as the beam ID for a certain time unit, the same DL transmission spatial filter as the notified source RS can also be used.

[0278] <Action 3>

[0279] For the beam of NCR-Fwd in the backhaul link, NCR 30 can assume the same TCI state as the control link of NCR-MT. In the case where NCR-MT uses beam management of 3GPP Release 15 / 16, the TCI state is notified per CORESET, per PDSCH, per CSI-RS, per PUCCH resource, per PUSCH or per SRS resource.

[0280] Here, when NCR-MT uses beam management of 3GPP version 15 / 16, it is assumed that NCR-MT uses different TCI states for different channels or RSs. At this time, it is necessary to decide which TCI state of the control link of NCR-MT is applied to the backhaul link of NCR-Fwd.

[0281] For the backhaul link of NCR-Fwd, NCR 30 can assume the same TCI state as the control link of NCR-MT. In the case where NCR-MT uses the unified TCI state of 3GPP Release 17, the notified unified TCI state can be applied to channels or reference signals as shown in Table 1.

[0282] [Table 1]

[0283]

[0284] For example, as shown in Table 1, in the case of CORESET for CSS other than CORESET0 and CSS (Common search space) type 3, whether to apply the notified unified TCI state can be set by the RRC parameter followUnifiedTCIstate. In the case of other CORESETs, the notified unified TCI state can be applied.

[0285] For example, as shown in Table 1, in the case of a PDSCH that is not UE-dedicated, whether to apply the notified unified TCI state can be set through the RRC parameter followUnifiedTCIstate. In the case of other PDSCHs, the notified unified TCI state can be applied.

[0286] For example, as shown in Table 1, in the case of A-CSI-RS (Aperiodic CSI-RS) or beam management, whether to apply the notified unified TCI state can be set through the RRC parameter followUnifiedTCIstate.

[0287] For example, as shown in Table 1, in the case of PUCCH or PUSCH, the notified unified TCI state may always be applied.

[0288] For example, as shown in Table 1, in the case of SRS, codebook, non-codebook for beam management, and AP (aperiodic: non-periodic) / SP (semi-persistent: semi-persistent) / P (periodic: periodic)-SRS for antenna switching, whether to apply the notified unified TCI state can be set by the RRC parameter followUnifiedTCIstate.

[0289] Here, when NCR-MT uses the unified TCI state framework of 3GPP Release 17, it is assumed that NCR-MT uses different TCI states for different channels or RSs. At this time, it is necessary to decide which TCI state of the control link of NCR-MT is applied to the backhaul link of NCR-Fwd.

[0290] In the case of a time unit in which the NCR 30 only forwards the uplink signal from the terminal 20 to the base station 10, the NCR 30 does not need to send the UL channel and / or reference signal by itself. That is, it is also not necessary to schedule the UL channel and / or reference signal for the NCR 30. In the absence of an indication of the transmit beam to be sent by the NCR 30, the NCR 30 can assume that the uplink transmit beam is the latest TCI state and / or spatial relationship of the specific uplink reference signal and / or channel of the NCR 30.

[0291] The latest TCI state and / or spatial relationship shown for a specific uplink reference signal and / or channel may be, for example, the latest TCI state and / or spatial relationship of PUSCH, PUCCH or SRS, or the latest TCI state and / or spatial relationship of PUCCH resource #0. In addition, NCR 30 may envision that the rules of 3GPP version 15 / 16 / 17 for determining the default beam of PUSCH, PUCCH or SRS are reused.

[0292] In the case of a time unit in which only a DL signal is forwarded from the base station 10 to the terminal 20, the NCR 30 does not need to detect and / or decode a downlink channel and / or a reference signal. That is, scheduling of a downlink channel or a reference signal for the NCR 30 may not be performed. In the absence of an indication of a transmit beam to be transmitted by the base station 10, the NCR 30 may determine a downlink receive beam received by the NCR 30 and / or a downlink transmit beam transmitted by the NCR 30 by assuming that the transmit beam to be transmitted by the base station 10 is in the latest TCI state shown for a specific downlink reference signal and / or channel.

[0293] The latest TCI state shown for a specific downlink reference signal and / or channel may be, for example, the latest TCI state of PDSCH, PDCCH or CSI-RS, or the latest TCI state of CORESET#0. In addition, NCR 30 may envision that the rules of 3GPP version 15 / 16 / 17 for determining the default beam of PDSCH, PDCCH or CSI-RS are reused.

[0294] When controlling the DL reception backhaul link of NCR-Fwd, the beam management framework of 3GPP version 15 / 16 can be used for NCR-MT. In a certain time unit, when NCR-MT receives a DL channel or RS in the time unit, the TCI state used by NCR-MT when receiving the DL channel or RS can be used for the DL reception backhaul link of NCR-Fwd in the unit time. It is assumed that the DL reception of NCR-MT and the DL reception of NCR-Fwd are supported at the same time.

[0295] In addition, in a certain time unit, when the NCR-MT does not receive a DL channel or RS in the time unit, the TCI state of the NCR-MT can be predefined, and the TCI state of the NCR-MT can also be used for the DL reception return link of the NCR-Fwd in the unit time. For the TCI state of the NCR-MT, the actions 1)-3) shown below can be performed.

[0296] 1) The TCI state of NCR-MT can be determined as the TCI state with the minimum or maximum ID among the TCI states set by RRC signaling. Alternatively, the TCI state of NCR-MT can be determined as the TCI state with the minimum or maximum ID among the TCI states activated by MAC-CE for PDSCH. Alternatively, the TCI state of NCR-MT can also be determined as the TCI state mapped to the maximum or minimum TCI code point activated by MAC-CE for PDSCH.

[0297] 2) The CORESET, CSI-RS or SSB of the NCR-MT can be determined and the TCI state of the CORESET, CSI-RS or SSB can be used. For example, the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index can be used. For example, the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index in the latest time slot monitored by the NCR-MT for the CORESET, CSI-RS or SSB can be used. For example, the TCI state corresponding to the CSI-RS or SSB identified by the NCR-MT at the time of initial access can be used.

[0298] 3) The PDSCH of the NCR-MT may be determined and the TCI state of the PDSCH may be used. For example, the TCI state of the latest PDSCH received by the NCR-MT may be used.

[0299] In addition, "TCI state" can be replaced by "QCL", "beam", "spatial relation" or "spatial domain filter".

[0300] When controlling the UL transmission backhaul link of NCR-Fwd, the beam management framework of 3GPP version 15 / 16 can be used for NCR-MT. In a certain time unit, when NCR-MT transmits a UL channel or RS in the time unit, the TCI state used when NCR-MT transmits the UL channel or RS can be used for the UL transmission backhaul link of NCR-Fwd in the unit time. However, it is assumed that the UL transmission of NCR-MT and the UL transmission of NCR-Fwd are supported to be executed simultaneously.

[0301] In addition, in a certain time unit, when the NCR-MT does not send a UL channel or RS in the time unit, the TCI state of the NCR-MT can be predefined, and the TCI state of the NCR-MT can also be used for the UL transmission return link of the NCR-Fwd in the unit time. For the TCI state of the NCR-MT, the TCI state of the DL channel or RS of the NCR-MT can be determined, and the TCI state can be applied to the UL transmission return of the NCR-MT. For example, the actions 1)-3) shown below can also be performed.

[0302] 1) The TCI state of NCR-MT can be determined as the TCI state with the minimum or maximum ID among the TCI states set by RRC signaling. Alternatively, the TCI state of NCR-MT can be determined as the TCI state with the minimum or maximum ID among the TCI states activated by MAC-CE for PDSCH. Alternatively, the TCI state of NCR-MT can also be determined as the TCI state mapped to the maximum or minimum TCI code point activated by MAC-CE for PDSCH.

[0303] 2) The CORESET, CSI-RS or SSB of the NCR-MT can be determined and the TCI state of the CORESET, CSI-RS or SSB can be used. For example, the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index can be used. For example, the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index in the latest time slot monitored by the NCR-MT for the CORESET, CSI-RS or SSB can be used. For example, the TCI state corresponding to the CSI-RS or SSB identified by the NCR-MT at the time of initial access can be used.

[0304] 3) The PDSCH of the NCR-MT may be determined and the TCI state of the PDSCH may be used. For example, the TCI state of the latest PDSCH received by the NCR-MT may be used.

[0305] In addition, the TCI state of the UL channel of the NCR-MT or the RS may be determined and applied to the UL transmission backhaul of the NCR-MT. For example, the actions 4)-6) shown below may also be performed.

[0306] 4) The TCI state of the UL channel or RS of the NCR-MT may be determined by a certain PUCCH-SpatialRelationinfo or SRS-SpatialRelationinfo. For example, the TCI state may be determined by the PUCCH-SpatialRelationinfo or SRS-SpatialRelationinfo with the maximum or minimum ID.

[0307] 5) PUCCH resources or SRS resources may also be determined. The TCI status of the determined PUCCH resources or SRS resources may be used. For example, the TCI status of the minimum or maximum PUCCH resource ID or SRS resource ID may be used. For example, the TCI status of the minimum or maximum PUCCH resource ID or SRS resource ID in the latest time slot in which the NCR-MT sent the PUCCH or SRS may be used.

[0308] 6) The PUSCH of the NCR-MT may be determined and the TCI state of the PUSCH may be used. For example, the TCI state of the latest PUSCH sent by the NCR-MT may be used.

[0309] In addition, regarding SRS resources, it is also possible to limit them to SRS resources set for codebook, non-codebook, beam management, or antenna switching. In addition, the "TCI state" can be replaced by "QCL", "beam", "spatial relation", or "spatial domain filter".

[0310] When controlling the DL reception backhaul link of NCR-Fwd, NCR-MT can use the unified TCI state framework of 3GPP version 17. In a certain time unit, when NCR-MT receives a DL channel or RS in the time unit, the TCI state used when NCR-MT receives the DL channel or RS can be used for the DL reception backhaul link of NCR-Fwd in the unit time. It is assumed that the DL reception of NCR-MT and the DL reception of NCR-Fwd are supported at the same time.

[0311] In addition, within a certain time unit, when the NCR-MT does not receive a DL channel or RS within the time unit, the notified unified TCI state can be used for the DL reception return link of the NCR-Fwd within the unit time. Alternatively, for the TCI state of the NCR-MT used by the DL reception return link of the NCR-Fwd within the unit time, the actions 1) to 3) shown below can be performed.

[0312] 1) The TCI state of NCR-MT can be determined as the TCI state with the minimum or maximum ID among the TCI states set by RRC signaling. Alternatively, the TCI state of NCR-MT can be determined as the TCI state with the minimum or maximum ID among the TCI states activated by MAC-CE for PDSCH. Alternatively, the TCI state of NCR-MT can also be determined as the TCI state mapped to the maximum or minimum TCI code point activated by MAC-CE for PDSCH.

[0313] 2) The CORESET, CSI-RS or SSB of the NCR-MT can be determined and the TCI state of the CORESET, CSI-RS or SSB can be used. For example, the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index can be used. For example, the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index in the latest time slot monitored by the NCR-MT for the CORESET, CSI-RS or SSB can be used. For example, the TCI state corresponding to the CSI-RS or SSB identified by the NCR-MT at the time of initial access can be used.

[0314] 3) The PDSCH of the NCR-MT may be determined and the TCI state of the PDSCH may be used. For example, the TCI state of the latest PDSCH received by the NCR-MT may be used.

[0315] When controlling the UL transmission backhaul link of NCR-Fwd, the unified TCI state framework of 3GPP version 17 can be used for NCR-MT. In a certain time unit, when NCR-MT transmits a UL channel or RS in the time unit, the TCI state used when NCR-MT transmits the UL channel or RS can be used for the UL transmission backhaul link of NCR-Fwd in the unit time. It is assumed that the UL transmission of NCR-MT and the UL transmission of NCR-Fwd are supported at the same time.

[0316] In addition, in a certain time unit, when the NCR-MT does not send a UL channel or RS in the time unit, the notified unified TCI state can be used for the UL transmission backhaul link of the NCR-Fwd in the unit time. Alternatively, for the TCI state of the NCR-MT used by the UL transmission backhaul link of the NCR-Fwd in the unit time, the actions 1) to 3) shown below can be performed.

[0317] 1) The TCI state of NCR-MT can be determined as the TCI state with the minimum or maximum ID among the TCI states set by RRC signaling. Alternatively, the TCI state of NCR-MT can be determined as the TCI state with the minimum or maximum ID among the TCI states activated by MAC-CE for PDSCH. Alternatively, the TCI state of NCR-MT can also be determined as the TCI state mapped to the maximum or minimum TCI code point activated by MAC-CE for PDSCH.

[0318] 2) The CORESET, CSI-RS or SSB of the NCR-MT can be determined and the TCI state of the CORESET, CSI-RS or SSB can be used. For example, the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index can be used. For example, the TCI state corresponding to the minimum or maximum CORESET ID, CSI-RS resource ID or SSB index in the latest time slot monitored by the NCR-MT for the CORESET, CSI-RS or SSB can be used. For example, the TCI state corresponding to the CSI-RS or SSB identified by the NCR-MT at the time of initial access can be used.

[0319] 3) The PDSCH of the NCR-MT may be determined and the TCI state of the PDSCH may be used. For example, the TCI state of the latest PDSCH received by the NCR-MT may be used.

[0320] In addition, the TCI state of the UL channel of the NCR-MT or the RS may be determined and applied to the UL transmission backhaul of the NCR-MT. For example, the actions 4)-6) shown below may also be performed.

[0321] 4) The TCI state of the UL channel or RS of the NCR-MT may be determined by a certain PUCCH-SpatialRelationinfo or SRS-SpatialRelationinfo. For example, the TCI state may be determined by the PUCCH-SpatialRelationinfo or SRS-SpatialRelationinfo with the maximum or minimum ID.

[0322] 5) PUCCH resources or SRS resources may also be determined. The TCI status of the determined PUCCH resources or SRS resources may be used. For example, the TCI status of the minimum or maximum PUCCH resource ID or SRS resource ID may be used. For example, the TCI status of the minimum or maximum PUCCH resource ID or SRS resource ID in the latest time slot in which the NCR-MT sent the PUCCH or SRS may be used.

[0323] 6) The PUSCH of the NCR-MT may be determined and the TCI state of the PUSCH may be used. For example, the TCI state of the latest PUSCH sent by the NCR-MT may be used.

[0324] In addition, "TCI state" can be replaced by "QCL", "beam", "spatial relation" or "spatial domain filter".

[0325] Through the above-mentioned embodiments, the network-controlled repeater can apply UL receive beam and DL transmit beam to the wireless signal relayed in the access link of NCR-Fwd based on the control from the network. In addition, the network-controlled repeater can apply DL receive beam and UL transmit beam to the wireless signal relayed in the return link of NCR-Fwd based on the control from the network.

[0326] That is, in a wireless communication system, wireless signals can be relayed by a wireless relay device controlled by a network.

[0327] (Hardware Structure)

[0328] The block diagram used in the description of the above embodiment ( Figure 2 , Figure 3 and Figure 4 ) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, using wires, wirelessly, etc.) and implemented using these multiple devices. The functional blocks can also be implemented by combining software in the above-mentioned one device or the above-mentioned multiple devices.

[0329] Functions include judging, determining, judging, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that performs a sending function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

[0330] For example, the base station 10 , the terminal 20 , the wireless relay device 30 and the like in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 22 1 is a diagram showing an example of a hardware configuration of a base station 10, a terminal 20, and a wireless relay device 30 according to an embodiment of the present disclosure. The base station 10, the terminal 20, and the wireless relay device 30 may be configured as a computer device that physically includes a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0331] In the following description, the word "device" may be replaced by "circuit", "device", "unit", etc. The hardware structure of the base station 10, terminal 20 and 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.

[0332] The functions of the base station 10, the terminal 20 and the wireless relay device 30 are implemented by the following method: predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0333] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, the control unit 140, the control unit 240, etc. may also be implemented by the processor 1001.

[0334] In addition, the processor 1001 reads a program (program code), a software module, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and performs various processes accordingly. As a program, a program that causes the computer to execute at least a part of the actions described in the above embodiments is used. For example, Figure 2 The control unit 140 of the base station 10 shown may also be implemented by a control program stored in the storage device 1002 and executed in the processor 1001. For example, Figure 3 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. Although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be implemented by more than one chip. In addition, the program can also be sent from the network via a telecommunication line.

[0335] The storage device 1002 is a computer-readable recording medium, and may be composed of at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing the communication method involved in one embodiment of the present disclosure.

[0336] The auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (CompactDisc ROM), a hard disk drive, a floppy 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 stripe, etc. The above-mentioned storage medium may be, for example, a database, a server, and other appropriate media including at least one of the storage device 1002 and the auxiliary storage device 1003.

[0337] The communication device 1004 is hardware (transceiver device) for communicating between computers via at least one of a wired network and a wireless network, and may also be referred to as a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may also be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to implement at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, a transceiver antenna, an amplifier unit, a transceiver unit, a transmission path interface, etc. may also be implemented by the communication device 1004. The transceiver unit may also be implemented by physically or logically separating the transmitting unit and the receiving unit.

[0338] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0339] In addition, the processor 1001 and the storage device 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or different buses may be used between the devices.

[0340] In addition, 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 ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and a part or all of each functional block may be implemented by the hardware. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0341] Furthermore, the wireless relay device 30 may include a variable phase shifter, a phase shifter, an amplifier, an antenna, an array antenna, etc. as hardware constituting the variable unit 340 and the antenna unit 350 as necessary.

[0342] Fig.23 FIG. 2 shows a structural example of a vehicle 2001. Fig.23 As shown, the vehicle 2001 includes a driving unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each form / embodiment described in the present disclosure may also be applied to a communication device mounted on the vehicle 2001, for example, may also be applied to the communication module 2013.

[0343] The driving 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 referred to as a steering wheel), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by a user.

[0344] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2029 included in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be referred to as an ECU (Electronic Control Unit).

[0345] As signals from various sensors 2021~2029, there are current signals from the current sensor 2021 that senses the current of the motor, speed signals of the front wheels and rear wheels obtained by the speed sensor 2022, air pressure signals of the front wheels and rear wheels obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression amount signals obtained by the accelerator pedal sensor 2029, brake pedal depression amount signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, detection signals for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028, and the like.

[0346] The information service unit 2012 is composed of various devices such as a car navigation system, an audio system, a speaker, 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 obtained from external devices via the communication module 2013 to provide various multimedia information and multimedia services to passengers of the vehicle 2001. The information service unit 2012 may include input devices (such as keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept inputs from the outside, and may also include output devices (such as displays, speakers, LED lights, touch panels, etc.) that implement outputs to the outside.

[0347] The driving assistance system unit 2030 is composed of various devices for preventing accidents or reducing the driver's driving load, such as millimeter wave radar, LiDAR (Light Detection and Ranging), camera, positioning device (such as GNSS, etc.), map information (such as high-definition (HD) map, autonomous driving vehicle (AV) map, etc.), gyroscope system (such as IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, AI processor, and one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 sends and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0348] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data with the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheel 2007, the rear wheel 2008, the axle 2009, the microprocessor 2031 in the electronic control unit 2010, the memory (ROM, RAM) 2032, and the sensors 2021 to 2029 via the communication port 2033.

[0349] The communication module 2013 can be controlled by the microprocessor 2031 of the electronic control unit 2010, and is a communication device that can communicate with an external device. For example, various information is sent and received with the external device via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. The external device can also be, for example, a base station, a mobile station, etc.

[0350] The communication module 2013 may also transmit at least one of the signals from the various sensors 2021-2028 input to the electronic control unit 2010, the information obtained based on the signals, and the information based on the 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 also be referred to as an input unit that receives input. For example, the PUSCH transmitted by the communication module 2013 may include the above-mentioned information based on the input.

[0351] The communication module 2013 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) sent from an external device and displays it on the information service unit 2012 of the vehicle 2001. The information service unit 2012 may also be referred to as an output unit that outputs information (for example, outputs information to a display, a speaker, etc. based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)). In addition, the communication module 2013 stores various information received from the external device in the memory 2032 that can be used by the microprocessor 2031. The microprocessor 2031 may also control the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the gear lever 2006, the front wheel 2007, the rear wheel 2008, the axle 2009, the sensors 2021 to 2029, etc. of the vehicle 2001 based on the information stored in the memory 2032.

[0352] (Summary of Implementation Methods)

[0353] As described above, according to an embodiment of the present invention, a wireless relay device is provided, which comprises: a communication unit, which sends and receives signaling containing control information related to a relay function with a base station; a control unit, which controls the relay function based on the control information; and a relay unit, which performs the following relay functions: receiving an uplink signal from a terminal, sending the uplink signal to the base station, receiving a downlink signal from the base station, and sending the downlink signal to the terminal, the control unit determining, based on the control information, an uplink receive beam applied to the reception of the uplink signal, an uplink transmit beam applied to the transmission of the uplink signal, a downlink receive beam applied to the reception of the downlink signal, and a downlink transmit beam applied to the transmission of the downlink signal.

[0354] According to the above structure, the network-controlled repeater can apply the UL receive beam and the DL transmit beam to the wireless signal relayed in the access link of NCR-Fwd based on the control from the network. In addition, the network-controlled repeater can apply the DL receive beam and the UL transmit beam to the wireless signal relayed in the return link of NCR-Fwd based on the control from the network. That is, in the wireless communication system, the wireless signal can be relayed by the wireless relay device controlled by the network.

[0355] Alternatively, the communication unit transmits information indicating a beam candidate set to be applied to the downlink transmission beam and the uplink reception beam to the base station, and receives information indicating a beam to be used within the beam candidate set from the base station. According to this structure, the network controlled repeater can apply the UL reception beam and the DL transmission beam to the wireless signal relayed in the access link of the NCR-Fwd based on control from the network.

[0356] Alternatively, the communication unit receives first control information indicating a beam candidate set applied to the downlink transmission beam and the uplink reception beam, receives second control information indicating a beam candidate subset within the beam candidate set applied to the downlink transmission beam, and receives third control information indicating a beam candidate subset within the beam candidate set applied to the uplink reception beam. According to this structure, the network-controlled repeater can apply the UL reception beam and the DL transmission beam to the wireless signal relayed in the access link of the NCR-Fwd based on control from the network.

[0357] Alternatively, the control unit determines the downlink receiving beam and the uplink transmitting beam within a certain unit time as the beams applied to the signaling received and sent within the unit time. According to this structure, the network controlled repeater can apply the DL receiving beam and the UL transmitting beam to the wireless signal relayed in the return link of the NCR-Fwd based on the control from the network.

[0358] Alternatively, when the control unit does not send or receive the signaling within a certain unit time, the control unit determines the downlink receive beam and the uplink transmit beam within the unit time based on the transmission configuration indication state, i.e., the TCI state, of the latest channel applied to carry the signaling. According to this structure, the network-controlled repeater can apply the DL receive beam and the UL transmit beam to the wireless signal relayed in the return link of the NCR-Fwd based on the control from the network.

[0359] In addition, according to an embodiment of the present invention, a communication method is provided, wherein the following steps are performed by a wireless relay device: a communication step, sending and receiving signaling containing control information related to the relay function between a base station; a control step, controlling the relay function based on the control information; a relay step, performing the following relay functions: receiving an uplink signal from a terminal, sending the uplink signal to the base station, receiving a downlink signal from the base station, and sending the downlink signal to the terminal; and determining, based on the control information, an uplink receive beam applied to the reception of the uplink signal, an uplink transmit beam applied to the transmission of the uplink signal, a downlink receive beam applied to the reception of the downlink signal, and a downlink transmit beam applied to the transmission of the downlink signal.

[0360] According to the above structure, the network-controlled repeater can apply the UL receive beam and the DL transmit beam to the wireless signal relayed in the access link of NCR-Fwd based on the control from the network. In addition, the network-controlled repeater can apply the DL receive beam and the UL transmit beam to the wireless signal relayed in the return link of NCR-Fwd based on the control from the network. That is, in the wireless communication system, the wireless signal can be relayed by the wireless relay device controlled by the network.

[0361] (Supplementary Implementation Methods)

[0362] The above describes the embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various variations, modifications, alternatives, replacements, etc. In order to promote the understanding of the invention, specific numerical examples are used for description, but unless otherwise specified, these numerical values ​​are only examples, and any appropriate value may also be used. The item distinction in the above description is not essential to the present invention. The items recorded in two or more items can be combined and used as needed, and the items recorded in a certain item can be applied to the items recorded in another item (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of the physical components. The actions of multiple functional units can be performed by one physical component, or the actions of one functional unit can be performed by multiple physical components. Regarding the processing steps described in the embodiment, the order of processing can be swapped if there is no contradiction. In order to facilitate the description of the processing, the base station 10 and the terminal 20 are described using a functional block diagram, but such a device can also be implemented by hardware, software, or a combination thereof. The software that operates according to the implementation mode of the present invention through the processor of the base station 10 and the software that operates according to the implementation mode of the present invention through the processor of the terminal 20 can also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server and any other appropriate storage medium.

[0363] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-level signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. In addition, RRC signaling may be referred to as an RRC message, for example, it may also be an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0364] Each form / embodiment described in the present disclosure can also be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6G (6th generation mobile communication system), xG (xth generation mobile communication system) (xG (x is, for example, an integer or a decimal)), FRA (Future Radio Access), NR (new Radio), NX (New Radio Access), FX (Future Generation Radio Access), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE At least one of 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems that are expanded, modified, created, and specified based on these systems. In addition, a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A and 5G, etc.) may also be applied.

[0365] The processing steps, timing, and flow of each form / implementation described in this specification may be reversed in order if there is no contradiction. For example, the method described in this disclosure uses the order of examples to indicate the elements of various steps, but is not limited to the specific order indicated.

[0366] In this specification, specific actions performed by the base station 10 are sometimes also performed by its upper node according to the situation. In a network composed of one or more network nodes having the base station 10, various actions performed for communicating with the terminal 20 can be performed by at least one of the base station 10 and other network nodes other than the base station 10 (for example, MME or S-GW, etc., but not limited to these). In the above, the case where there is one other network node other than the base station 10 is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0367] The information or signals described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), and can also be input or output via a plurality of network nodes.

[0368] The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0369] The determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0370] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0371] In addition, software, commands, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a web page, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0372] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0373] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0374] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0375] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, a wireless resource may be indicated by an index.

[0376] The names used for the above parameters are non-restrictive in any respect. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly disclosed in the present disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by all appropriate names, and therefore the various names assigned to these various channels and information elements are non-restrictive in any respect.

[0377] In the present disclosure, the terms "base station (BS)," "wireless base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier" and the like are used interchangeably. Sometimes, the base station is also referred to as macro cell, small cell, micro-micro cell, micro-micro cell and the like.

[0378] A base station can accommodate one or more (for example, 3) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station RRH: Remote Radio Head for indoor use). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of the base station and the base station subsystem that provide communication services within the coverage area.

[0379] In the present disclosure, the base station sending information to the terminal may be replaced by the base station instructing the terminal to perform control / action based on the information.

[0380] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0381] For mobile stations, those skilled in the art sometimes also use the following terms: 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 appropriate terms.

[0382] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to an object that can move, and the moving speed is arbitrary. In addition, of course, it also includes the case where the mobile body stops. The mobile body includes, for example, vehicles, transport vehicles, cars, motorcycles, bicycles, networked cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, two-wheel trailers, rickshaws, ships (ships and other watercraft: ships and other ships), airplanes, rockets, artificial satellites, Drone (registered trademark), multi-rotor helicopters, quadcopters, balloons and objects mounted on them, and is not limited to this. In addition, the mobile body may also be a mobile body that drives autonomously based on an operating instruction. It may be a means of transportation (for example, a car, an airplane, etc.), a mobile body that moves in an unmanned manner (for example, a drone, an autonomous driving car, etc.), or a robot (man-driven or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0383] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple terminals 20 (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.) may also apply various forms / implementations of the present disclosure. In this case, it may also be configured that the terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0384] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may have the functions of the user terminal.

[0385] The terms "determining" and "determining" used in the present disclosure sometimes also include a variety of actions. "Determining" and "determining" may include, for example, considering matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include matters that have been received (for example, receiving information), transmitted (for example, sending information), input, output, accessed (for example, accessed data in memory) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. as matters that have been "judged" or "determined". That is, "judgment" and "decision" may include certain actions that are considered to be "judged" or "decided". In addition, "judgment (decision)" may also be replaced by "assuming", "expecting", "considering", etc.

[0386] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include the situation where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used to replace "connection". In the context of the present disclosure, 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, and as some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible) region may be used to "connect" or "couple" to each other.

[0387] The reference signal may be referred to as RS (Reference Signal) for short, or may be referred to as a pilot signal (Pilot) according to the applied standard.

[0388] The phrase “based on” used in the present disclosure does not mean “only based on” unless otherwise explicitly stated. In other words, the phrase “based on” means both “only based on” and “at least based on”.

[0389] Any reference to an element using the designations "first", "second", etc. used in this disclosure does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, a reference to a first element and a second element does not mean that only two elements can be taken or that the first element must precede the second element in any form.

[0390] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section”, “circuit”, “device” or the like.

[0391] When the terms "include", "including" and their variations are used in the present disclosure, these terms are intended to be inclusive like the term "comprising". Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0392] A radio frame may be composed of one or more frames in the time domain. In the time domain, one or more frames may be referred to as a subframe. A subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is independent of a numerology.

[0393] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may, for example, represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the time domain, and the like.

[0394] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0395] A time slot may contain multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in units of time greater than a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type B.

[0396] A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent time units for transmitting signals. A radio frame, a subframe, a time slot, a mini-time slot, and a symbol may be referred to by other corresponding names.

[0397] For example, one subframe may be referred to as a transmission time interval (TTI), multiple consecutive subframes may be referred to as a TTI, and one time slot or one mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing a TTI may not be referred to as a subframe, but as a time slot, a mini time slot, or the like.

[0398] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each terminal 20) to each terminal 20 in units of TTI. In addition, the definition of TTI is not limited to this.

[0399] TTI can be a transmission time unit of data packets (transport blocks), code blocks, code words, etc. after channel coding, or a processing unit such as scheduling and link adaptation. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which the transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0400] In addition, when one time slot or one mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can be the minimum time unit for scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit for scheduling can be controlled.

[0401] A TTI with a time length of 1 ms is also called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-time slot, a sub-time slot, a time slot, etc.

[0402] In addition, for a long TTI (for example, a normal TTI, a subframe, etc.), it can be understood as a TTI with a time length exceeding 1ms, and for a short TTI (for example, a shortened TTI, etc.), it can be understood as a TTI with a TTI length less than that of a long TTI (long TTI) and greater than 1ms.

[0403] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may include one or more consecutive subcarriers. The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined according to the parameter set.

[0404] In addition, the time domain of an RB may include one or more symbols, and may be the length of one slot, one mini slot, one subframe, or one TTI. One TTI, one subframe, etc. may be composed of one or more resource blocks, respectively.

[0405] In addition, one or more RBs may also be referred to as a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, etc.

[0406] In addition, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0407] A bandwidth part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, the common RBs may be identified by the index of the RBs relative to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0408] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for the terminal 20 within one carrier.

[0409] At least one of the set BWPs may be active, and it is not assumed that the terminal 20 transmits and receives a predetermined signal / channel outside the activated BWP. In addition, "cell", "carrier" and the like in the present disclosure may be replaced with "BWP".

[0410] The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length may be changed in various ways.

[0411] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure also includes a case where the noun following the article is in plural form.

[0412] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". In addition, the term may mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0413] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched depending on the execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., notification of the scheduled information is not performed).

[0414] In the present disclosure, the variable unit 340 and the antenna unit 350 are examples of a relay unit.

[0415] The present disclosure is described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0416] Description of symbols

[0417] 10: Base Station

[0418] 110: Sending Department

[0419] 120: Receiving Department

[0420] 130: Setting department

[0421] 140: Control Department

[0422] 20: Terminal

[0423] 210: Sending Department

[0424] 220: Receiving Department

[0425] 230: Setting department

[0426] 240: Control Department

[0427] 30: Wireless relay device

[0428] 310: Sending Department

[0429] 320: Receiving Department

[0430] 330: Control Department

[0431] 340: Variable part

[0432] 350: Antenna

[0433] 1001: Processor

[0434] 1002: Storage device

[0435] 1003: Auxiliary storage device

[0436] 1004: Communication device

[0437] 1005: Input device

[0438] 1006: Output device

[0439] 2001: Vehicles

[0440] 2002: Drive Department

[0441] 2003: Steering

[0442] 2004: Accelerator pedal

[0443] 2005: Brake pedal

[0444] 2006: Gear Lever

[0445] 2007: Front wheel

[0446] 2008: Rear wheel

[0447] 2009: Axles

[0448] 2010: Electronic Control Department

[0449] 2012: Information Services Department

[0450] 2013: Communication Module

[0451] 2021: Current Sensors

[0452] 2022: Speed ​​Sensor

[0453] 2023: Air pressure sensor

[0454] 2024: Vehicle speed sensor

[0455] 2025: Accelerometers

[0456] 2026: Brake pedal sensor

[0457] 2027: Gearshift sensor

[0458] 2028: Object detection sensors

[0459] 2029: Accelerator pedal sensor

[0460] 2030: Driving Assistance Systems Division

[0461] 2031: Microprocessors

[0462] 2032: Memory (ROM, RAM)

[0463] 2033: Communication port (IO port)

Claims

1. A wireless relay device, comprising: A communication unit, which sends and receives signaling including control information related to the relay function with the base station; a control unit that controls a relay function based on the control information; and a relay unit, which performs the following relay functions: receiving an uplink signal from a terminal, sending the uplink signal to the base station, receiving a downlink signal from the base station, and sending the downlink signal to the terminal, The control unit determines, based on the control information, an uplink reception beam used for receiving the uplink signal, an uplink transmission beam used for transmitting the uplink signal, a downlink reception beam used for receiving the downlink signal, and a downlink transmission beam used for transmitting the downlink signal.

2. The wireless relay device according to claim 1, wherein: The communication unit transmits information indicating a beam candidate set to be applied to the downlink transmission beam and the uplink reception beam to the base station, and receives information indicating a beam to be used in the beam candidate set from the base station.

3. The wireless relay device according to claim 1, wherein: The communication unit receives first control information indicating a beam candidate set applied to the downlink transmission beam and the uplink reception beam, receives second control information indicating a subset of beam candidates within the beam candidate set applied to the downlink transmission beam, and receives third control information indicating a subset of beam candidates within the beam candidate set applied to the uplink reception beam.

4. The wireless relay device according to claim 1, wherein: The control unit determines the downlink reception beam and the uplink transmission beam within a certain unit time as beams applied to the signaling transmitted and received within the unit time.

5. The wireless relay device according to claim 1, wherein: When the control unit does not send or receive the signaling within a unit time, it determines the downlink receiving beam and the uplink transmitting beam within the unit time based on the transmission configuration indication state, i.e., the TCI state, of the latest channel used to carry the signaling.

6. A communication method, wherein: The wireless relay device performs the following steps: A communication step, sending and receiving signaling containing control information related to the relay function with the base station; A control step, controlling a relay function based on the control information; A relay step, performing the following relay functions: receiving an uplink signal from the terminal, sending the uplink signal to the base station, receiving a downlink signal from the base station, and sending the downlink signal to the terminal; as well as Based on the control information, determine an uplink receive beam used for receiving the uplink signal, an uplink transmit beam used for sending the uplink signal, a downlink receive beam used for receiving the downlink signal, and a downlink transmit beam used for sending the downlink signal.

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