Wireless relay device and wireless relay method

Abstract

The present invention is provided with: a communication unit that receives, from a base station, signaling including a transmission power control command pertaining to a relay function; a control unit that determines transmission power to be applied to a relay function on the basis of the transmission power control command received in a certain section; and a relay unit that performs a relay function for receiving an uplink signal from a terminal, transmitting the uplink signal to the base station by applying the determined transmission power, receiving a downlink signal from the base station, and transmitting the downlink signal to the terminal by applying the determined transmission power.

Description

Technical Field

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

[0002] In 3GPP (registered trademark) (3rd Generation Partnership Project), a wireless communication method called 5G or NR (New Radio) (hereinafter referred to as "NR") is being studied in order to achieve further increase in system capacity, further increase in data transmission speed, and further decrease 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 making the latency in wireless intervals less than 1 ms (for example, non-patent document 1).

[0003] In the next generation of communications, high frequency bands are expected to be used. From the perspectives of reducing the number of scatterers, reducing shadow effects, and increasing distance attenuation based on the characteristics of this high frequency band, it is required to improve communication quality. Beam control and environment that ensure communication quality are essential.

[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 a multipath environment by using passive repeaters or active reflectors (RIS: Reconfigurable Intelligent Surface) and intelligent repeaters that receive, amplify and retransmit signals (e.g., Non-Patent Document 2).

[0005] Prior art literature

[0006] Non-patent literature

[0007] Non-patent document 1: 3GPP TS 38.300 V17.1.0 (2022-06)

[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 TR 38.867 V0.1.0 (2022-05)

[0010] Non-patent document 4: 3GPP TS 38.213 V17.2.0 (2022-06) Summary of the invention

[0011] Problems to be solved by the invention

[0012] As mentioned above, research is underway 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, wireless relay devices controlled by a network need to clearly control the transmission power when relaying wireless signals between base stations and terminals.

[0013] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to determine the transmission power used for relaying wireless signals by a wireless relay device controlled by a network in a wireless communication system.

[0014] Means for solving problems

[0015] According to the disclosed technology, a wireless relay device is provided, comprising: a communication unit, which receives signaling including a transmission power control command related to a relay function from a base station; a control unit, which determines the transmission power applied to the relay function based on the transmission power control command received in a certain interval; and a relay unit, which performs the following relay functions: receiving an uplink signal from a terminal, applying the determined transmission power to send the uplink signal to the base station, receiving a downlink signal from the base station, and applying the determined transmission power to send the downlink signal to the terminal.

[0016] Effects of the Invention

[0017] According to the disclosed technology, in a wireless communication system, a wireless relay device controlled by a network can determine the transmission power used for relaying wireless signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a diagram for explaining a wireless communication system in an embodiment of the present invention.

[0019] 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.

[0020] Figure 3 This is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention.

[0021] 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.

[0022] Figure 5 It is a diagram showing an operation example of the wireless relay device 30 in the embodiment of the present invention.

[0023] Figure 6 is a diagram showing an example of communication in a high frequency band.

[0024] Figure 7 This is a diagram showing an example of a reflective type wireless relay device 30 in the embodiment of the present invention.

[0025] Figure 8 This is a diagram showing an example of a transmissive wireless relay device 30 in the embodiment of the present invention.

[0026] Fig. 9 It is a diagram showing an example of a network controlled repeater in the embodiment of the present invention.

[0027] Fig.10 This is a diagram for explaining an example of transmission power control.

[0028] Fig.11 This is a diagram for explaining example (1) of transmission power control in the embodiment of the present invention.

[0029] Fig.12 This is a diagram for explaining example (2) of transmission power control in the embodiment of the present invention.

[0030] Fig.13 This is a diagram for explaining example (3) of transmission power control in the embodiment of the present invention.

[0031] Fig.14 This is a diagram for explaining example (4) of transmission power control in the embodiment of the present invention.

[0032] Fig.15 This is a diagram for explaining example (5) of transmission power control in the embodiment of the present invention.

[0033] Fig.16 This is a diagram for explaining example (6) of transmission power control in the embodiment of the present invention.

[0034] Fig.17 This is a diagram for explaining example (7) of transmission power control in the embodiment of the present invention.

[0035] Fig.18 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.

[0036] Fig.19 This is a diagram showing an example of the structure of a vehicle 2001 in the embodiment of the present invention. DETAILED DESCRIPTION

[0037] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0038] In the operation of the wireless communication system of the embodiment of the present invention, the existing technology is appropriately used. However, the existing technology is, for example, the existing LTE, but is not limited to the existing LTE. In addition, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and methods after LTE-Advanced (for example: NR) unless otherwise specified.

[0039] In addition, in the embodiments of the present invention described below, terms such as 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), and PUSCH (Physical Uplink Shared Channel) used in existing LTE are used. This is for the convenience of recording, and the same signals, functions, etc. as them 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 explicitly recorded as "NR-".

[0040] 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.).

[0041] 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 .

[0042] 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 plural in number.

[0043] The base station 10 is a communication device that provides more than one cell and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined by 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 also be a subframe.

[0044] 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.

[0045] 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 transmits 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 transmitted via control channels such as PUCCH and PDCCH is referred to as a control signal, and the content transmitted via shared channels such as PUSCH and PDSCH is referred to as data, but such a calling method is only an example.

[0046] 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 1As shown, the terminal 20 receives a control signal or data from the base station 10 via DL, and sends the 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 also be referred to as a UE, and the base station 10 may be referred to as a gNB.

[0047] 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. In addition, a PUCCH-SCell having a PUCCH may also be used.

[0048] 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 operated in 5G or 6G, and forms a cell. In addition, the cell is a relatively large cell, which is called a macro cell.

[0049] Base stations 10A to 10D are base stations used in 5G or 6G. Base stations 10A to 10D form cells A to D, which are smaller in size than macro cells. Cells A to D may also be referred to as small cells or macro cells. Figure 1 As shown, cells A to D may be formed to be included in a macro cell.

[0050] A macro cell can generally be interpreted as a communication area with a radius of hundreds of meters to 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.

[0051] 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 and type of base stations and terminals is not limited to Figure 1 Example shown.

[0052] In addition, the wireless communication system is not necessarily limited to a wireless communication system based on 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 based on LTE.

[0053] As an example, the base station 10 and the base stations 10A to 10D perform wireless communication based on 5G or 6G with 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 sent from multiple antenna elements, carrier aggregation (CA) that bundles and uses multiple 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.

[0054] 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. In addition, the wireless communication system can also support a frequency band exceeding 52.6GHz to 114.25GHz. This frequency band can also be called a millimeter wave band.

[0055] 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 narrow beams, the received signal power can be increased by beamforming gain. Furthermore, it is foreseeable that the effects of reduced interference and efficient use of wireless resources can be achieved.

[0056] 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 also 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), it may also be a reflector called a metamaterial reflector, a dynamic metasurface, a metasurface lens, etc. (for example, non-patent document 2).

[0057] In the embodiment of the present invention, the wireless relay device 30, for example, relays a wireless signal transmitted 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", "convergence (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 transmitted from the terminal 20, and may also relay the wireless signal transmitted from the base station 10.

[0058] As an example, the wireless relay device 30 can change the phase of the wireless signal relayed to the terminal 20. Based on this viewpoint, 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, etc.

[0059] In addition, in the embodiment of the present invention, the wireless relay device 30 such as RIS may also be referred to as 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 may be defined as having the functions shown in the following 1)-5).

[0060] 1) It may also have a function of receiving a signal sent from the base station 10. The signal may be a DL signal, SSB (SS / PBCH block), PDCCH, PDSCH, DM-RS (Demodulation Reference Signa l), PT-RS (Phase Tracking Reference Signal), CSI-RS (Channel Status Information Reference Signal), RIS dedicated signal, etc. It may also have a function of receiving a signal that transmits information related to the metamaterial function. In addition, it may also have a function of sending the signal to the terminal 20. SSB may be a signal including a synchronization signal and broadcast information.

[0061] 2) It may also have a function of sending a signal to the base station 10. The signal may be a UL signal, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signal, etc. 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.

[0062] 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.

[0063] 4) It may also have a function of reflecting 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)-state, QCL (Quasi Co Location), selection and application of beams, and selection and application of spatial filters / precoding weights).

[0064] 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.

[0065] In addition, "receive and transmit," "relay" 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 the transmission is performed.

[0066] Function A: Apply phase shifter.

[0067] Function B: Not passing through compensation circuit (eg amplification, filtering).

[0068] As another example,

[0069] Function A: Apply phase shifter and compensation circuit.

[0070] Function B: without frequency conversion.

[0071] Furthermore, in the wireless relay device 30 such as RIS, the amplitude may be amplified when the phase is changed. Furthermore, "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 level, or directly sending the received signal without interpreting the signal (in this case, the phase may be changed, the amplitude may be amplified, etc.).

[0072] (Device Structure)

[0073] 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.

[0074] <Base station 10>

[0075] Figure 2 1 is a diagram showing an example of the functional configuration of the base station 10. Figure 2 As shown, the base station 10 includes a transmitting unit 110 , a receiving unit 120 , a setting unit 130 and a control unit 140 . Figure 2 The functional configuration shown is only an example. As long as the operation of the embodiment of the present invention can be performed, the functional division and the name of the functional unit can be arbitrary. The transmission unit 110 and the reception unit 120 can also be called a communication unit.

[0076] 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 signal. 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.

[0077] 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.

[0078] <Terminal 20>

[0079] 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 configuration shown is only an example. As long as the operation of the embodiment of the present invention can be performed, the functional division and the name of the functional unit can be arbitrary. The transmission unit 210 and the reception unit 220 can also be called a communication unit.

[0080] The transmission unit 210 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The reception unit 220 wirelessly receives various signals and obtains a higher layer signal from the received physical layer signal. In addition, the transmission unit 210 transmits HARQ-ACK, and the reception unit 220 receives the setting information described in the embodiment, etc.

[0081] 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.

[0082] <Wireless Relay Device 30>

[0083] 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 of the embodiments of the present invention can be performed, the functional division 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.

[0084] The antenna unit 350 includes at least one antenna connected to the variable unit 340. For example, the antenna unit 350 may 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.

[0085] 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.

[0086] 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 is performed 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, and can also 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 also control the variable unit 340 by selecting an appropriate receiving beam and a transmitting beam (direction) based on control information such as SSB. Similarly, the control unit 330 can also control the variable unit 340 by selecting an appropriate combination of receiving direction and transmitting direction based on the reception state, based on criteria such as reception quality or maximum received power.

[0087] 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 hereinafter). For example, the control unit 330 can use a well-known method such as an active repeater or RIS to change the phase without using transmission power, thereby relaying the radio wave received from the base station 10A 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 it to the terminal 20 or the base station 10A. That is, by changing the phase of the array antenna, etc. according to 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, etc.

[0088] In addition, in the embodiment of the present invention, the control unit 330 can obtain information according to the reception state. In addition, the receiving unit 320 can also obtain control information from the base station 10A or the terminal 20. For example, the receiving unit 320 can 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.

[0089] In addition, the control unit 330 may estimate the propagation path information (H) between the radio wave generation source (e.g., the base station 10A or the terminal 20) and the antenna unit 350 based on the reception state (e.g., change in reception power, etc.) during the control of the variable unit 340. PT and H RP ).

[0090] 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 the received power when the phase of the variable unit 340 of the array antenna unit 350 is orthogonally switched according to the same principle as I / Q (In-phase / Quadrature) detection.

[0091] 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.

[0092] 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, such as when there is 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.

[0093] 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 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. PT , H RT The wireless relay device 30 may 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.

[0094] 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 (base station antenna and terminal antenna in the figure, etc.).

[0095] 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 the wireless signal, which is 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.

[0096] 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 radio waves. When the line of sight between the base station 10A and the terminal 20 is not blocked, even when the high frequency band is used, the wireless communication between the base station 10A and the terminal 20 is not 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.

[0097] When considering the existence of applications (remote operation, etc.) that effectively utilize high-speed, large-capacity, and low-latency characteristics, it is important to eliminate blind spots and ensure the connection between base stations and terminals so that communications within the wireless communication system are not interrupted.

[0098] 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 signal sources are no longer required, so that coverage can be expanded, and installation and operation costs based on additional base stations can be reduced.

[0099] 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.

[0100] 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 wave propagation control device makes the terminal 20 and the like feedback the communication state when the load (phase) state changes randomly, and searches for the best condition. On the other hand, in the propagation path information specification, the load state is 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.

[0101] In addition, as a relay method, there are types such as reflection, transmission, diffraction, and convergence, 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 convergence type, refer to non-patent document 2, etc.).

[0102] Figure 7 FIG. 2 is a diagram showing an example of a reflective type wireless relay device 30 in the 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.

[0103] 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.

[0104] Figure 8 FIG. 1 is a diagram showing an example of a transmission type wireless relay device 30 in the 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 each arranged in pairs 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 or the like to measure the receiving state. In addition, based on the received signal observed when the multiple phase conditions of the relay antenna are changed, the propagation path of the relay antenna can be estimated.

[0105] For example, in future networks such as 6G, higher quality is required than in 5G. For example, ultra-high speed at the tera bps level, high reliability and low latency at the optical communication level, etc. are required. In addition, it is necessary to consider ultra-coverage enhancement, ultra-long-distance communication, ultra-reliability communication, virtual cells, flexible networks, mesh networks, side link enhancement, and RIS or smart repeater design.

[0106] In order to achieve this quality, it is envisioned that very high frequencies such as terahertz waves are used. For example, when using very high frequencies such as terahertz waves, the advantages are envisioned to be high speed due to ultra-wideband and low latency due to short symbol length. On the other hand, it is also envisioned that there are disadvantages such as narrow coverage due to 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.

[0107] As described above, the RIS reflects or transmits the beam transmitted from the base station 10 or the terminal 20 in a predetermined direction and transmits it to the terminal 20 or the base station 10. The passive RIS is a device that does not change the reflection angle or beam width according to the position of the mobile station, and does not require control information. On the other hand, it is difficult to perform precise beam control. The 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 on the other hand, it requires control information, so the overhead increases. The RIS can increase the transmission points of communication.

[0108] In addition, RIS may be any of the names shown in 1) to 5) below, but is not limited to these.

[0109] 1) Battery less device

[0110] 2) Metamaterial functional devices

[0111] 3) Intelligent reflecting surface

[0112] 4) Smart repeater

[0113] 5) Network-controlled repeater

[0114] 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).

[0115] 1) UE functions

[0116] Function to receive 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) meta-material function can be received. Function to send signals to the base station 10 (e.g., UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signals). Through this sending function, information related to the following 2) meta-material function can be sent. Function to synchronize frames with the base station 10.

[0117] 2) Metamaterial Functions

[0118] Function of reflecting the signal sent from the base station 10 or the terminal 20 (e.g., phase change). The signal can be reflected by changing the phase of each of the multiple reflective elements of the RIS, or by making a common phase change in the multiple reflective elements. Functions related to beam control (e.g., TCI-state, functions related to QCL control, selection and application of beams, 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 can be changed differently for each reflective element of the RIS, or by making a common power change for the multiple reflective elements.

[0119] "Receiving and transmitting" in RIS may also mean reflecting radio waves / signals. The terms "base station" and "terminal" are used below, but are not limited to these and may be replaced by communication devices. RIS may also be replaced by intelligent repeaters, repeaters, etc.

[0120] For example, RIS may also operate according to the assumptions shown in the following 1)-6).

[0121] 1) Network operator sets up RIS

[0122] 2)RIS is fixed and does not move

[0123] 3)RIS only relays signals from one base station

[0124] 4) Capable of receiving and sending control signals

[0125] 5) Half-duplex operation

[0126] 6) Single RIS environment

[0127] Research is underway on network-controlled repeaters (e.g., non-patent document 3) that are wireless relay devices controlled by the network. Network-controlled repeaters are different from conventional amplification and forwarding repeaters in that, for example, beam, timing, DL or UL, ON or OFF, and transmission power can be controlled from the network. Hereinafter, "network-controlled repeaters" are also referred to as "repeaters."

[0128] To extend the coverage in FR1 and FR2 bands, network controlled repeaters are used as in-band RF repeaters. Specifically, configurations for FR2 in outdoor scenarios and O2I (outdoor to indoor) scenarios are envisioned. For example, a single-hop and non-mobile environment can also be envisioned as an environment for network controlled repeaters. In addition, the network controlled repeater can also be transparent to the UE. In addition, the network controlled repeater is able to maintain both the gNB-repeater link and the repeater-UE link at the same time.

[0129] The following research has been conducted on side control information from a network control repeater.

[0130] Information related to beamforming

[0131] Information related to the timing of sending or receiving

[0132] Information related to UL-DL TDD settings

[0133] ON-OFF information for interference control and power saving

[0134] Power control for interference control

[0135] 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.

[0136] 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 in the following. 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 be based on the NR-Uu interface.

[0137] NCR-Fwd (Forwarding) can be defined as a device having the function of amplifying and forwarding UL and DL RF signals between the base station 10 and the terminal 20 via a backhaul link and an access link. The operation of 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.

[0138] When power control is indicated as the control information on the NCR side, the control of the amplification gain of the NCR-Fwd can also be used to control the power of the NCR-Fwd. Here, the transmission power control of the NCR-Fwd needs to be clarified.

[0139] Therefore, the following operations 1) to 3) related to the transmission power control of NCR-Fwd may be performed. Note that the following is an overview and the details will be described later.

[0140] Action 1) In the DL and / or UL transmission power control of NCR-Fwd, NCR 30 can perform transmission power control based on the sum of TPC (Transmission Power Control) commands in the following interval.

[0141] Option 1) The interval from the end of the NCR-Fwd transmission opportunity of i-i0 to the start of the transmission opportunity of i Option 2) The interval from the start of the NCR-Fwd transmission opportunity of i-i0 to the start of the transmission opportunity of i Option 3) The interval from the timing K(i-i0) before the transmission opportunity of i-i0 NCR-Fwd to the timing K(i) before the start of the transmission opportunity of i Option 4) The interval from the RRC signaling, MAC-CE or DCI as the signaling for notifying specific information to the start of the transmission opportunity of i Option 5) The interval from the RRC signaling, MAC-CE or DCI as the signaling for notifying specific information to the timing K(i) before the start of the transmission opportunity of i

[0142] Option 6) The interval from a specific codeword or time slot to the start of the transmission opportunity i. Option 7) The interval from a specific codeword or time slot to the timing K(i) before the start of the transmission opportunity i. Action 2) When the result of the indication of the DL and / or UL transmission power of NCR-Fwd is exceeding the maximum transmission power or being lower than the minimum transmission power, the following options can be performed.

[0143] Option 1) The DL and / or UL transmit power of NCR-Fwd is determined according to the implementation of NCR30.

[0144] Option 2) Use the DL and / or UL transmit power of NCR-Fwd as the maximum transmit power or the minimum transmit power. Option 3) Use the DL and / or UL transmit power of NCR-Fwd as the transmit power of the transmit opportunity i-i0. Option 4) Ignore the indication until an indication is received that the DL and / or UL transmit power of NCR-Fwd is not the maximum transmit power or the minimum transmit power.

[0145] Option 5) Ignore all TPC commands within the interval set in action 1).

[0146] Action 3) NCR 30 may also reset the sum of TPC commands if instructed by the network.

[0147] In addition, the network may control the DL and / or UL transmission power of NCR-Fwd and send an instruction to NCR 30 to increase or decrease the transmission power, such as a TPC command for the UE.

[0148] When TPC accumulation is enabled, for example, when it is enabled by a high-level parameter from the network, NCR 30 calculates the total of TPC values ​​indicated in a certain time interval in order to determine the transmission power and / or amplifier gain. For example, TPC accumulation can be enabled when the high-level parameter tpc-Accumulation (see non-patent document 4) is not given as in the UE. Alternatively, TPC accumulation can be enabled when the high-level parameter tpc-Accumulation is given.

[0149] At NCR transmission occasion i, the transmission power can be determined as follows.

[0150] Power adjustment value (i) = Σ m＝0 X(i) TPC(m)

[0151] Or, power adjustment value (i-i0) = ∑ m＝0 X(i) TPC(m)

[0152] Here, TPC(m=0), TPC(m=1), ..., TPC(m=X) are TPC indications received within a certain period.

[0153] The transmission power and / or amplifier gain P(i) in an NCR transmission opportunity (i) can be determined as follows.

[0154] P(i)=P0+power adjustment value(i)

[0155] In addition, P0 can be a predefined value, a value notified from the network through RRC signaling, MAC-CE or DCI, or the transmission power and / or amplifier gain in the transmission opportunity (i-i0) of NCR-Fwd.

[0156] In addition, the NCR transmission opportunity may be defined based on the interval in which the NCR 30 is ON, or may be defined based on scheduling of the UE, etc.

[0157] For example, an NCR transmission opportunity may be one or more symbols or time slots in which NCR-Fwd is indicated to forward a signal from the gNB to the UE or from the UE to the gNB (i.e., indicated to be ON). NCR-Fwd may use the same transmission power and / or amplifier gain in a certain transmission opportunity.

[0158] The NCR-Fwd may be explicitly notified of "ON". For example, the NCR-Fwd may be explicitly notified that one or more symbols or slots are "ON".

[0159] NCR-Fwd may also be notified "ON" implicitly. For example, when notified that one or more symbols or time slots are valid for an NCR access link beam or an NCR return link beam, NCR-Fwd may determine that the one or more symbols or time slots are "ON".

[0160] In addition, "ON" may be implicitly notified to NCR-Fwd. For example, when the NCR-MT is notified of the resources of the cell-specific signal or channel, NCR30 may determine it as "ON". For example, the cell-specific signal or channel may be SSB, periodic or semi-persistent CSI-RS or SIB.

[0161] The TPC command may also inform NCR-Fwd of the adjustment of the transmit power and / or amplifier gain.

[0162] The transmission opportunity (i-i0) of NCR-Fwd may be the transmission opportunity immediately preceding the transmission opportunity (i) of NCR-Fwd. For example, i0 may always be 1. That is, all i-i0 may be replaced by i-1. For example, the starting position (or starting symbol or time slot) and the ending position (or ending symbol or time slot) of the transmission opportunity (i-i0) of NCR-Fwd may be earlier than the starting position (or starting symbol or time slot) of the transmission opportunity (i) in the time domain.

[0163] In addition, for example, as in the UE, the minimum positive integer that is earlier in the time domain than the time K(i) symbol before the transmission opportunity (i) of NCR-Fwd can be set to i0.

[0164] In addition, the embodiments of the present invention can be applied to DL transmission power control of NCR-Fwd, can be applied to UL transmission power control of NCR-Fwd, and can be applied to DL transmission power control and UL transmission power control of NCR-Fwd.

[0165] Here, NCR needs to define the period for accumulating TPC values.

[0166] Fig.10 FIG. 1 is a diagram for explaining an example of transmission power control. Fig.10 As shown, a normal UE accumulates TPC between a time K_PUSCH(i-i0)-1 symbol before PUSCH transmission opportunity (i-i0) and a time K_PUSCH(i) symbol before PUSCH transmission opportunity (i) to determine the power adjustment value in transmission opportunity (i).

[0167] Formula 1 represents the PUSCH power adjustment state l.

[0168] [Formula 1]

[0169]

[0170] The PUSCH power adjustment state l corresponds to the activated UL-BWP b, carrier f, serving cell c, PUSCH transmission opportunity (i) when the higher layer parameter tpc-Accumulation is not given.

[0171] δ of Formula 1 PUSCH，b，f，c It is defined in Table 1 (see Non-Patent Document 4).

[0172] [Table 1]

[0173] TPC Command Field <![CDATA[Accumulatedδ PUSCH，b，f，c or δ SRS，b，f，c [dB]]]> <![CDATA[Absoluteδ PUSCH，b，f，c or δ SRS，b，f，c [dB]]]> 0 -1 -4 1 0 -1 2 1 1 3 3 4

[0174] The ∑ in formula 1 corresponds to the sum of the TPC command values. The cardinality C(Di), i.e., the sum of the set Di of TPC command values, received by the UE between the time K_PUSCH(i-i0)-1 symbols before the PUSCH transmission opportunity (i-i0) and the time K_PUSCH(i) symbols before the PUSCH transmission opportunity (i) corresponds to the activation of UL-BWP b, carrier f, serving cell c, PUSCH transmission opportunity (i). The minimum positive integer that is earlier in the time domain than the time K(i) symbols before the PUSCH transmission opportunity (i) can be set to i0.

[0175] like Fig.10 As shown, when PUSCH is scheduled by DCI, K_PUSCH(i) in the activated UL-BWPb, carrier f, and serving cell c corresponds to the number of symbols from immediately after the last symbol received by the PDCCH corresponding to the DCI to immediately before the starting symbol sent by the PUSCH.

[0176] When PUSCH transmission is configured by the high-level parameter ConfiguredGrantConfig (see non-patent document 4), K_PUSCH(i) becomes the minimum value given by k2 contained in the high-level parameter PUSCH-ConfigCommon (see non-patent document 4) in the activated UL-BWPb, carrier f, and serving cell c and the number of symbols per time slot N. symb slot K PUSCH，min Number of code elements.

[0177] Operation 1 will be described in detail below.) In the DL and / or UL transmission power control of NCR-Fwd, the power adjustment value of the transmission opportunity (i) of NCR 30 may be determined based on the sum of TPC (Transmission Power Control) commands in the following interval.

[0178] Fig.11 1 is a diagram for explaining example (1) of transmission power control in an embodiment of the present invention. Fig.11 As shown, by applying the above option 1), the interval from the end of the NCR-Fwd transmission opportunity (i-i0) to the start of the transmission opportunity (i) can be used as the period for calculating the total of received TPCs, or as the period for accumulating received TPCs.

[0179] Fig.12 FIG. 2 is a diagram for explaining example (2) of transmission power control in an embodiment of the present invention. Fig.12As shown, by applying the above option 2), the interval from the start of NCR-Fwd's transmission opportunity (i-i0) to the start of transmission opportunity (i) can be used as the period for calculating the total of received TPCs, or as the period for accumulating received TPCs.

[0180] Fig.13 3 is a diagram for explaining example (3) of transmission power control in an embodiment of the present invention. Fig.13 As shown, the above option 3) can be applied, and the interval from the moment K(i-i0) before the transmission opportunity (i-i0) of NCR-Fwd to the moment K(i) before the transmission opportunity (i) can be used as the period for calculating the total received TPC, or as the period for accumulating the received TPC.

[0181] K(i) may be a predefined value or a value notified from the network through RRC signaling, MAC-CE or DCI. For example, when the transmission opportunity (i) of NCR-Fwd is notified through DCI, K(i) may be the number of symbols or time slots from immediately after the end time (or the last symbol or time slot) of the PDCCH transmitting the DCI to immediately before the start time (or the starting symbol or time slot) of the transmission opportunity (i) of NCR-Fwd.

[0182] Fig.14 4 is a diagram for explaining example (4) of transmission power control in an embodiment of the present invention. Fig.14 As shown, the above option 4) can be applied, and the interval from the time immediately after the end of the RRC signaling, MAC-CE or DCI (or the last codeword or time slot) as the signaling notifying specific information to the time immediately before the start of the transmission opportunity (i) of the NCR-Fwd (or the starting codeword or time slot) can be set as the period for calculating the total of the received TPC, or it can be set as the period for accumulating the received TPC.

[0183] The transmission power and / or amplifier gain P(i) in the transmission opportunity (i) of NCR-Fwd may be P0+power adjustment value (i). P0 may be a value notified from the network through RRC signaling, MAC-CE or DCI, which is the signaling notifying specific information.

[0184] In addition, as another example, the interval from the moment after K code elements or time slots immediately after the end moment (or the last code element or time slot) of the RRC signaling, MAC-CE or DCI serving as the signaling notifying specific information to the moment immediately before the start moment (or the starting code element or time slot) of the transmission opportunity (i) of the NCR-Fwd can be set as the period for calculating the total of the received TPC, or can be set as the period for accumulating the received TPC.

[0185] Fig.15 1 is a diagram for explaining example (5) of transmission power control in an embodiment of the present invention. Fig.15 As shown, the above option 5) can be applied, and the interval from the end time (or the last codeword or time slot) immediately after the RRC signaling, MAC-CE or DCI serving as the signaling for notifying specific information to the time K(i) before the start time (or the starting codeword or time slot) of the NCR-Fwd transmission opportunity (i) is set as the period for calculating the total received TPC, or it can be set as the period for accumulating the received TPC.

[0186] The transmission power and / or amplifier gain P(i) in the transmission opportunity (i) of NCR-Fwd may be P0+power adjustment value (i). P0 may be a value notified from the network through RRC signaling, MAC-CE or DCI, which is the signaling notifying specific information.

[0187] In addition, as another example, the interval from the moment after K code elements or time slots immediately after the end moment (or the last code element or time slot) of the RRC signaling, MAC-CE or DCI serving as the signaling notifying specific information to the moment K(i) before the start moment (or the starting code element or time slot) of the transmission opportunity (i) of NCR-Fwd can be set as the period for calculating the total received TPC, or can be set as the period for accumulating the received TPC.

[0188] Fig.16 6 is a diagram for explaining example (6) of transmission power control in an embodiment of the present invention. Fig.16 As shown, the above option 6) can be applied, and the interval from the codeword or time slot pre-defined or notified by the network to the start time of the NCR-Fwd transmission opportunity (i) (or the starting codeword or time slot) can be used as the period for calculating the total received TPC, or as the period for accumulating the received TPC.

[0189] Fig.17 7 is a diagram for explaining example (7) of transmission power control in an embodiment of the present invention. Fig.17As shown, the above option 7) can be applied, and the interval from a codeword or time slot pre-defined or notified by the network to a time point K(i) earlier than the start time (or the starting codeword or time slot) of the NCR-Fwd transmission opportunity (i) can be used as the period for calculating the total received TPC, and can also be used as the period for accumulating the received TPC.

[0190] In addition, the above options 1), 2) and 3) can also be applied to the following situations:

[0191] For the transmission power and / or amplifier gain P(i) in the NCR transmission opportunity (i), P(i) = P0 + power adjustment value (i), P0 can be a predefined value or a value notified from the network through RRC signaling, MAC-CE or DCI, and power adjustment value (i) = power adjustment value (i-i0) + ∑ m＝0 X(i) TPC(m).

[0192] Alternatively, for the transmission power and / or amplifier gain P(i) in the NCR transmission opportunity (i), P(i) = P0 + power adjustment value (i), P0 is the transmission power and / or amplifier gain in the transmission opportunity (i-i0) of NCR-Fwd, and power adjustment value (i) = ∑ m＝0 X(i) TPC(m).

[0193] In addition, the above options 4), 5), 6) and 7) can also be applied to the following situations:

[0194] For the transmission power and / or amplifier gain P(i) in the NCR transmission opportunity (i), P(i) = P0 + power adjustment value (i), P0 can be a predefined value or a value notified from the network through RRC signaling, MAC-CE or DCI, and power adjustment value (i) = ∑ m＝0 X(i) TPC(m).

[0195] Action 2) is described in detail below. It is necessary to define the action of NCR-Fwd when the DL and / or UL transmission power and / or amplifier gain of NCR-Fwd notified from the network exceeds the maximum value or falls below the minimum value.

[0196] In a normal UE, the PUSCH power adjustment state l is defined in Formula 1, which corresponds to the activated UL-BWP b, carrier f, serving cell c, PUSCH transmission opportunity (i) when the higher layer parameter tpc-Accumulation is not given.

[0197] Moreover, when the UE reaches the maximum transmission power under the conditions of activating UL-BWP b, carrier f, and serving cell c during PUSCH transmission (i-i0) and satisfies the conditions of Formula 2, as shown in Formula 2, it can be set to f b，f，c (i,l)=f b，f，c (i-i0,l).

[0198] [Formula 2]

[0199]

[0200] Furthermore, when the UE reaches the minimum transmission power in the activated UL-BWP b, carrier f, and serving cell c during the PUSCH transmission period (i-i0) and satisfies the condition of Formula 3, as shown in Formula 3, it can be set to f b，f，c (i,l)=f b，f，c (i-i0,l).

[0201] [Formula 3]

[0202]

[0203] In the case where the result of the indication of the DL and / or UL transmit power and / or amplifier gain of the NCR-Fwd for the transmit opportunity (i) of the NCR-Fwd exceeds the maximum transmit power or is lower than the minimum transmit power, at the transmit opportunity (i) of the NCR-Fwd, the NCR-Fwd may perform the following options.

[0204] Option 1) The DL and / or UL transmit power of NCR-Fwd is determined by the implementation of NCR-Fwd.

[0205] Option 2) Use the DL and / or UL transmit power of NCR-Fwd as the maximum transmit power or the minimum transmit power. Option 3) Use the DL and / or UL transmit power of NCR-Fwd as the transmit power of transmit opportunity (i-i0). Option 4) Ignore the latest M TPC commands among the X(i) TPC commands received during the period defined by action 1) until the DL and / or UL transmit power of NCR-Fwd does not exceed the maximum transmit power or does not fall below the minimum transmit power. That is, NCR-Fwd may also ignore the minimum value of M TPC commands that satisfy the following conditions.

[0206] By ∑ m＝1 X(i)-M+1 The adjusted power is greater than the maximum power or less than the minimum power, and the m＝1 X(i)-M The adjusted power is not greater than the maximum power or not less than the minimum power.

[0207] Option 5) Ignore all X(i) TPC commands received within the interval defined in action 1).

[0208] In addition, when the transmission opportunity (i-i0) reaches the maximum power and Σ m＝1 X(i) When TPC(m) is greater than 0, or when the transmission opportunity (i-i0) reaches the minimum power and Σ m＝1 X(i) When TPC(m) is greater than or equal to 0, the above-mentioned options 1) to 5) can also be applied.

[0209] The above options 1) to 3) may be applied when another method is used in the DL / UL transmission power control of NCR-Fwd. The other method may be, for example, a method of notifying relative power or absolute power.

[0210] Action 3) is described in detail below. In a normal UE, the PUSCH power adjustment state l is defined in Formula 1, and the PUSCH power adjustment state l corresponds to the activated UL-BWPb, carrier f, serving cell c, and PUSCH transmission opportunity (i) when the high-level parameter tpc-Accumulation is not given.

[0211] Moreover, the UE can notify the corresponding P 0_UE_PUSCH，b，f，c (j) or the higher-ups have informed α b，f，c In case (j), the accumulation of PUSCH power control state 1 is reset.

[0212] When NCR-Fwd is notified by the network through RRC signaling, MAC-CE or DCI, it can reset the accumulation of TPC, that is, the power adjustment value (k) = 0, k = 0, 1..., i.

[0213] For example, for the transmission power and / or amplifier gain P(i) of the NCR transmission opportunity (i), P(i) = P0 + power adjustment value (i), where P0 is set by the network through RRC signaling, MAC-CE or DCI. When the NCR-Fwd receives the setting of P0, the power adjustment value (k) (k = 0, 1, ···, i) can be reset to 0.

[0214] Alternatively, the power adjustment value (k) (k=0, 1, . . . , i) may be reset to X. X may be set by the network through RRC signaling, MAC-CE, or DCI.

[0215] It is also possible to define the capabilities of the NCR shown below.

[0216] ·Whether NCR30 supports DL transmit power control of NCR-Fwd.

[0217] Whether NCR30 supports UL transmit power control of NCR-Fwd.

[0218] ·Whether NCR30 supports the transmit power control in the existing UE.

[0219] In addition, the embodiments of the present invention may also be applied only to the case where the NCR 30 supports the corresponding capabilities and / or the corresponding high-layer signaling is provided.

[0220] According to the above-described embodiment, the network-controlled repeater can determine the transmission power to be applied to the wireless signal to be relayed in the access link or the backhaul link of the NCR-Fwd based on the control from the network.

[0221] That is, in a wireless communication system, a wireless relay device controlled by a network can determine the transmission power used for relaying wireless signals.

[0222] (Hardware Structure)

[0223] The block diagram used in the description of the above embodiment ( Figure 2 , Figure 3 as well as Figure 4 ) shows a block of functional units. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using one device that is physically or logically combined, or it can be implemented by connecting two or more physically or logically separated devices directly or indirectly (for example, using wires, wirelessly, etc.) and using these multiple devices. The functional block can be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0224] Functionally, it includes judging, deciding, determining, 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 is not limited to these. For example, a functional block (structural unit) that enables the sending function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

[0225] 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 function as a computer that executes the processing according to the wireless communication method of the present disclosure. Fig.18 1 is a diagram showing an example of a hardware structure 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 also 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, a bus 1007, and the like.

[0226] In the following description, the word "device" may be replaced by "circuit", "equipment (device)", "unit (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.

[0227] The functions in 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.

[0228] 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. described above may also be implemented by the processor 1001.

[0229] 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-mentioned 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. In addition, for example, Figure 3The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and running in the processor 1001. Regarding the above-mentioned various processes, 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.

[0230] The storage device 1002 is a computer-readable recording medium, and may be composed of at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc. The storage device 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The storage device 1002 can store a program (program code), a software module, etc. that can be executed to implement the communication method of one embodiment of the present disclosure.

[0231] 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 suitable medium such as a database or a server including at least one of the storage device 1002 and the auxiliary storage device 1003.

[0232] 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 is also called a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., for example, in order to realize 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 realized by the communication device 1004. The transceiver unit may be installed physically or logically separately in the transmitting unit and the receiving unit.

[0233] 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).

[0234] 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 may be configured using different buses for each device.

[0235] 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.

[0236] Furthermore, the wireless relay device 30 may include a variable phase machine, 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.

[0237] Fig.19 FIG. 2 shows a structural example of a vehicle 2001. Fig.19 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 mode / 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.

[0238] 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 handle), and is configured to steer at least one of the front wheels and the rear wheels according to the operation of the steering wheel operated by a user.

[0239] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2029 provided in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be referred to as an ECU (Electronic Control Unit).

[0240] As signals from various sensors 2021 to 2029, there are current signals from the current sensor 2021 for sensing the current of the motor, speed signals of the front and rear wheels obtained by the speed sensor 2022, air pressure signals of the front 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.

[0241] 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 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 an external device via the communication module 2013 and the like to provide various multimedia information and multimedia services to the passengers of the vehicle 2001. The information service unit 2012 may also include an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) for accepting input from the outside, and may also include an output device (e.g., a display, a speaker, an LED light, a touch panel, etc.) for implementing output to the outside.

[0242] The driving assistance system unit 2030 is composed of various devices such as millimeter wave radar, LiDAR (Light Detection and Ranging), camera, locator (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, etc., which are used to provide functions for preventing accidents in advance or reducing the driver's driving load, 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.

[0243] 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 and the memory (ROM, RAM) 2032 in the electronic control unit 2010, and the sensors 2021 to 29 via the communication port 2033.

[0244] The communication module 2013 can be controlled by the microprocessor 2031 of the electronic control unit 2010, and is a communication device capable of communicating 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.

[0245] The communication module 2013 transmits at least one of the signals from the various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above input.

[0246] 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 provided in 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 shift lever 2006, the front wheel 2007, the rear wheel 2008, the axle 2009, the sensors 2021 to 2029, etc. provided in the vehicle 2001 based on the information stored in the memory 2032.

[0247] (Summary of Implementation Methods)

[0248] As described above, according to an embodiment of the present invention, there is provided a wireless relay device comprising: a communication unit, which receives signaling including a transmission power control command related to a relay function from a base station; a control unit, which determines the transmission power applied to the relay function based on the transmission power control command received in a certain interval; and a relay unit, which performs the following relay functions: receiving an uplink signal from a terminal, applying the determined transmission power to send the uplink signal to the base station, receiving a downlink signal from the base station, and applying the determined transmission power to send the downlink signal to the terminal.

[0249] According to the above structure, the network controlled repeater can determine the transmission power of the wireless signal to be relayed in the access link or return link of the NCR-Fwd based on the control from the network. That is, in the wireless communication system, the wireless relay device controlled by the network can determine the transmission power to be applied to the relay of the wireless signal.

[0250] Alternatively, the control unit determines the transmission power applied to the relay function based on a value obtained by accumulating the transmission power control commands received in the interval from the end time of the immediately preceding transmission opportunity to the start time of the transmission opportunity. According to this structure, the network controlled repeater can determine the transmission power applied to the wireless signal relayed in the access link or the return link of the NCR-Fwd based on the control from the network.

[0251] Alternatively, the control unit determines the transmission power applied to the relay function based on a value obtained by accumulating the transmission power control commands received in the interval from a moment before the end of the immediately preceding transmission opportunity by a first period to a moment before the start of the transmission opportunity by a second period. According to this structure, the network controlled repeater can determine the transmission power applied to the wireless signal relayed in the access link or the return link of the NCR-Fwd based on the control from the network.

[0252] Alternatively, the control unit sets the transmission power to the maximum transmission power when the transmission power determined based on the transmission power control command exceeds the maximum transmission power, and sets the transmission power to the minimum transmission power when the transmission power determined based on the transmission power control command is lower than the minimum transmission power. According to this structure, the network controlled repeater can determine the transmission power applied to the wireless signal relayed in the access link or the return link of the NCR-Fwd based on the control from the network.

[0253] Alternatively, the control unit may reset the accumulated value based on the transmission power control command when the base station instructs the communication unit. According to this structure, the network controlled repeater can determine the transmission power applied to the wireless signal relayed in the access link or return link of the NCR-Fwd based on the control from the network.

[0254] In addition, according to an embodiment of the present invention, a wireless relay method is provided, in which a wireless relay device performs the following steps: receiving signaling including a transmit power control command related to a relay function from a base station; determining a transmit power applied to the relay function based on the transmit power control command received in a certain interval; and performing the following relay functions: receiving an uplink signal from a terminal, applying the determined transmit power to send the uplink signal to the base station, receiving a downlink signal from the base station, and applying the determined transmit power to send the downlink signal to the terminal.

[0255] According to the above structure, the network controlled repeater can determine the transmission power of the wireless signal to be relayed in the access link or return link of the NCR-Fwd based on the control from the network. That is, in the wireless communication system, the wireless relay device controlled by the network can determine the transmission power to be applied to the relay of the wireless signal.

[0256] (Supplementary Implementation Methods)

[0257] 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, substitutions, 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 distinction between the items in the above description is not essential to the present invention. The matters recorded in more than two items can be combined and used as needed, and the matters recorded in a certain item can be applied to the matters recorded in other items (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 physically performed by one component, or the actions of one functional unit can be physically performed by multiple components. Regarding the processing process 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 by the processor of the base station 10 according to the embodiment of the present invention and the software that operates by the processor of the terminal 20 according to the embodiment of the present invention may also be stored in any appropriate storage medium such as random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, etc.

[0258] 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-layer signaling (e.g., RRC (Radio Resource Control) signaling, MACC (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 also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0259] The various forms / embodiments described in the present disclosure may 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), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE At least one of 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), a system using other appropriate systems, and a next-generation system extended, modified, generated, or specified therefrom. In addition, a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may be applied.

[0260] The processing procedures, timings, flows, etc. of each form / implementation described in this specification may be changed in order without contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0261] In this specification, specific actions performed by the base station 10 are sometimes performed by its upper node depending on the situation. In a network composed of one or more network nodes having the base station 10, various actions performed to communicate 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 can be considered, but not limited to this). In the above, the case where the other network node other than the base station 10 is one is illustrated, but the other network node can also be a combination of multiple other network nodes (for example, MME and S-GW).

[0262] 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.

[0263] 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.

[0264] 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).

[0265] 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 code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, functions, or the like.

[0266] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a website, 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.

[0267] 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, code elements, 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.

[0268] 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.

[0269] As used in this disclosure, the terms "system" and "network" may be used interchangeably.

[0270] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a predetermined value, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0271] The names used for the above parameters are not restrictive in any way. In addition, the formulas and the like using these parameters may sometimes differ from those explicitly disclosed in the present disclosure. Since various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by all appropriate names, the various names assigned to these various channels and information elements are not restrictive in any way.

[0272] 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, femto cell, pico cell and the like.

[0273] A base station can accommodate one or more (for example, three) 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 for indoor use (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0274] In the present disclosure, the base station sending information to the terminal may also be replaced by the base station instructing the terminal to perform a control / action based on the information.

[0275] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0276] 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.

[0277] At least one of the base station and the mobile station may 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 a movable object, and the moving speed is arbitrary. In addition, of course, it also includes the situation where the mobile body is stopping. The mobile body includes, for example, vehicles, transport vehicles, cars, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones (registered trademarks), multicopters, quadcopters, hot air balloons, and objects mounted on them, and are not limited to these. In addition, the mobile body may also be a mobile body that drives autonomously based on an operating instruction. The mobile body 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- or unmanned). In addition, at least one of the base station and the mobile station may include 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.

[0278] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, with respect to 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.), the various forms / implementations of the present disclosure may also be applied. 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, the terms "uplink" and "downlink" may also be replaced by terms corresponding to the communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0279] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may also have the functions of the user terminal described above.

[0280] The terms "determining" and "determining" used in the present disclosure sometimes also include a variety of actions. "Judgment" and "determination" 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, "judgment" and "determination" 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, "judgment" and "determination" 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" can include matters that are considered to have "judged" and "decided" certain actions. In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0281] 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 instead of "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 (both visible and invisible) region may be used to "connect" or "couple" to each other.

[0282] The reference signal may be referred to as RS (Reference Signal) for short, or may be referred to as a pilot signal according to the applied standard.

[0283] The phrase "according to" used in the present disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to".

[0284] 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 can be used as a simple method to distinguish between two or more elements in this disclosure. 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.

[0285] The "unit" in the configuration of each of the above-mentioned devices may be replaced with a "section", "circuit", "device" or the like.

[0286] When the terms "include", "including" and their variations are used in the present disclosure, these terms mean inclusiveness like the term "comprising". Furthermore, the term "or" used in the present disclosure means not exclusive or.

[0287] 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 subframes. A subframe may be further 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 not dependent on a parameter set (numerology).

[0288] A parameter set may also 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, wireless 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.

[0289] 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.

[0290] 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.

[0291] 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.

[0292] For example, 1 subframe may also be referred to as a transmission time interval (TTI), multiple consecutive subframes may also be referred to as a TTI, and 1 time slot or 1 mini time slot may also be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1ms) in the existing LTE, or a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. In addition, the unit representing the TTI may not be a subframe, but may be referred to as a time slot, a mini time slot, or the like.

[0293] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules the allocation of 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.

[0294] TTI can be a transmission time unit for data packets (transport blocks), code blocks, code words, etc. after channel coding, and can also be a processing unit for scheduling, link adaptation, etc. 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.

[0295] In addition, when 1 time slot or 1 mini time slot is called TTI, more than one TTI (ie, more than one time slot or more than one mini time slot) can constitute the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can be controlled.

[0296] A TTI with a time length of 1 ms may also be referred to as 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 referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0297] In addition, for long TTI (e.g., normal TTI, subframe, etc.), it can be replaced with a TTI with a time length exceeding 1ms, and for short TTI (e.g., shortened TTI, etc.), it can be replaced with a TTI length smaller than the long TTI and having a TTI length of more than 1ms.

[0298] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers contained in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers contained in an RB may also be determined according to the parameter set.

[0299] In addition, the time domain of an RB may include one or more symbols, and may also be the length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. may be composed of one or more resource blocks, respectively.

[0300] 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, and the like.

[0301] In addition, a resource block may be composed of one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

[0302] A bandwidth part (BWP) (also referred to as a partial bandwidth, etc.) may 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.

[0303] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be set for the terminal 20 within one carrier.

[0304] 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".

[0305] The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each 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, the cyclic prefix (CP: Cyclic Prefix) length, etc. can be changed in various ways.

[0306] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0307] In the present disclosure, the term "A and B are different" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0308] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched with execution. In addition, notification of predetermined information (e.g., notification of "yes X") is not limited to being performed explicitly, but may also be performed implicitly (e.g., not notifying the predetermined information).

[0309] In addition, in the present disclosure, the variable unit 340 and the antenna unit 350 are examples of a relay unit.

[0310] 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 has no limiting meaning to the present disclosure.

[0311] Description of symbols

[0312] 10 Base Station

[0313] 110 Sending Department

[0314] 120 Receiving Department

[0315] 130 Setting Department

[0316] 140 Control Department

[0317] 20 Terminal

[0318] 210 Sending Department

[0319] 220 Receiving Department

[0320] 230 Setting Department

[0321] 240 Control Department

[0322] 30 Wireless relay device

[0323] 310 Sending Department

[0324] 320 Receiving Department

[0325] 330 Control Department

[0326] 340 Variable part

[0327] 350 Antenna Department

[0328] 1001 Processor

[0329] 1002 Storage Device

[0330] 1003 Auxiliary storage device

[0331] 1004 Communication device

[0332] 1005 Input Device

[0333] 1006 Output Device

[0334] 2001 Vehicles

[0335] 2002 Drive Department

[0336] 2003 Steering

[0337] 2004 Accelerator pedal

[0338] 2005 Brake Pedal

[0339] 2006 Gear Lever

[0340] 2007 Front wheel

[0341] 2008 Rear wheel

[0342] 2009 Axle

[0343] 2010 Electronic Control Department

[0344] 2012 Information Services Department

[0345] 2013 Communication Module

[0346] 2021 Current Sensor

[0347] 2022 Speed ​​Sensor

[0348] 2023 Air Pressure Sensor

[0349] 2024 Vehicle speed sensor

[0350] 2025 Accelerometer

[0351] 2026 Brake pedal sensor

[0352] 2027 Gear lever sensor

[0353] 2028 Object Detection Sensor

[0354] 2029 Accelerator pedal sensor

[0355] 2030 Driving Assistance Systems Division

[0356] 2031 Microprocessor

[0357] 2032 Memory (ROM, RAM)

[0358] 2033 Communication port (IO port)

Claims

1. A wireless relay device, comprising: a communication unit that receives, from a base station, a signaling including a transmission power control command related to a relay function; a control unit that determines a transmission power to be applied to a relay function based on the transmission power control command received in a certain section; and The relay unit performs the following relay functions: receiving an uplink signal from a terminal, and sending the uplink signal to the base station using the determined transmission power; receiving a downlink signal from the base station, and sending the downlink signal to the terminal using the determined transmission power.

2. The wireless relay device according to claim 1, wherein: The control unit determines the transmission power to be applied to the relay function based on a value obtained by accumulating the transmission power control commands received in a period from an end time of the immediately preceding transmission opportunity to a start time of the transmission opportunity.

3. The wireless relay device according to claim 1, wherein: The control unit determines the transmission power applied to the relay function based on a value obtained by accumulating the transmission power control commands received in a period from a time before the end of the immediately preceding transmission opportunity by a first period to a time before the start of the transmission opportunity by a second period.

4. The wireless relay device according to claim 1, The control unit sets the transmission power to the maximum transmission power when the transmission power determined based on the transmission power control command exceeds the maximum transmission power, and sets the transmission power to the minimum transmission power when the transmission power determined based on the transmission power control command is lower than the minimum transmission power.

5. The wireless relay device according to claim 1, wherein: The control unit resets the accumulated value based on the transmission power control command when the base station instructs the communication unit.

6. A wireless relay method, wherein the wireless relay device performs the following steps: receiving signaling including a transmit power control command related to a relay function from a base station; determining a transmit power to be applied to a relay function based on the transmit power control command received in a certain interval; and The following relay functions are performed: receiving an uplink signal from a terminal, applying the determined transmission power to send the uplink signal to the base station, receiving a downlink signal from the base station, and applying the determined transmission power to send the downlink signal to the terminal.

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