Radio relay apparatus and radio relay method

Abstract

To specify operations of transmission / reception of control information and transmission / reception of a relay signal by a radio relay device.SOLUTION: A radio relay apparatus comprising: a communication section that relays communication between a base station and a terminal; a control section that determines not to simultaneously perform transmission of control information and transmission of a relay signal in the communication; and a transmission section that does not perform transmission of the relay signal at a timing when the control information is transmitted.SELECTED DRAWING: Figure 8

Description

[Technical Field]

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

[0002] For NR (New Radio) (also known as "5G"), the successor system to LTE (Long Term Evolution), technologies that satisfy requirements such as a large-capacity system, high-speed data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, and low power consumption are being considered (for example, Non-Patent Document 1).

[0003] Next-generation communications are expected to use high-frequency bands. The characteristics of these bands require improvements in communication quality due to the reduction in the number of scatterers, the reduction in the shadowing effect, and the increase in distance attenuation. It is expected that beam control and environments that guarantee communication quality will be required.

[0004] For example, in high frequency bands, there is a problem that blind zones are likely to occur due to the strong directional nature of radio waves, etc. Therefore, methods have been attempted to improve communication quality in a multipath environment by using wireless relay devices such as passive repeaters, active reflectors (RIS: Reconfigurable Intelligent Surface), and smart repeaters that receive, amplify, and re-emit signals (for example, Non-Patent Document 2). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TS 38.300 V16.7.0(2021-09) [Non-patent document 2] NTT Docomo, "White Paper: 5G Advancements and 6G" (2021-02, 3.0 edition) Internet <URL: https: / / www.nttdocomo.co.jp / binary / pdf / corporate / technology / whitepaper_6g / DOCOMO_6G_White_PaperJP_20210203.pdf> Summary of the Invention [Problem to be solved by the invention]

[0006] It is necessary to define the operation of transmitting and receiving control information and relay signals by the radio relay device.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to define the operations of transmitting and receiving control information and relay signals by a wireless relay device. [Means for solving the problem]

[0008] According to the disclosed technology, a wireless relay device is provided that includes a transmitting unit that transmits capability information to a base station indicating whether control information and relay signals can be transmitted simultaneously in communication between the base station and a terminal, and a communication unit that relays communication between the base station and the terminal, wherein the transmitting unit transmits the control information and relay signals simultaneously. [Effects of the Invention]

[0009] The disclosed technology provides a technology that defines the operations of transmitting and receiving control information and relay signals by a wireless relay device. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating an example of a functional configuration of a base station according to an embodiment of the present invention. [Figure 3]FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal according to an embodiment of the present invention. [Figure 4] FIG. 2 is a diagram illustrating an example of a functional configuration of a wireless relay device according to an embodiment of the present invention. [Figure 5] 10A and 10B are diagrams illustrating an example of operation of a wireless relay device according to an embodiment of the present invention. [Figure 6] FIG. 1 is a diagram illustrating an example of communication in a high frequency band. [Figure 7] 1 is a diagram illustrating an example of a reflective wireless repeater according to an embodiment of the present invention; [Figure 8] 1 is a diagram illustrating an example of a transparent wireless repeater according to an embodiment of the present invention; [Figure 9] FIG. 4 is a diagram illustrating a step value according to the first embodiment of the present invention. [Figure 10] FIG. 10 is a diagram illustrating an example of a method for updating an amplification value according to Example 2 of an embodiment of the present invention. [Figure 11] FIG. 10 is a diagram illustrating transmission of control information of a wireless relay device according to a second embodiment of the present invention. [Figure 12] FIG. 10 is a diagram for explaining application timing of received information according to option 1 of Example 4 of the embodiment of the present invention. [Figure 13] FIG. 10 is a diagram for explaining the application timing of reception information according to option 2 of Example 4 of the embodiment of the present invention. [Figure 14] 1 is a diagram illustrating an example of a hardware configuration of a base station, a terminal, or a wireless relay device according to an embodiment of the present invention. [Figure 15] 1 is a diagram showing an example of a configuration of a vehicle according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0012] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are used as appropriate. However, the existing technologies are, for example, but not limited to, the existing LTE. Furthermore, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems subsequent to LTE-Advanced (e.g., NR) unless otherwise specified.

[0013] Furthermore, in the embodiments of the present invention described below, terms used in existing LTE, 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), are used. This is for convenience of description, and similar signals, functions, etc. may be referred to by other names. Furthermore, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used in NR are not necessarily designated as "NR-".

[0014] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0015] Furthermore, in the embodiments of the present invention, when radio parameters and the like are "configured," it may mean that predetermined values ​​are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.

[0016] Fig. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. There may be a plurality of base stations 10 and a plurality of terminals 20.

[0017] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Furthermore, a TTI (Transmission Time Interval) in the time domain may be a slot or a subslot, or a TTI may be a subframe.

[0018] Base station 10 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with terminal 20. In carrier aggregation, one primary cell (PCell) and one or more secondary cells (SCells) are used.

[0019] The base station 10 transmits a synchronization signal, system information, and the like to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, on the NR-PBCH or PDSCH, and is also called broadcast information. As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 on the DL (Downlink) and receives control signals or data from the terminal 20 on the UL (Uplink). Note that, here, what is transmitted on a control channel such as the PUCCH or PDCCH is called a control signal, and what is transmitted on a shared channel such as the PUSCH or PDSCH is called data, but these names are merely examples.

[0020] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 may be referred to as a UE, and the base station 10 may be referred to as a gNB.

[0021] Terminal 20 can perform carrier aggregation, which aggregates multiple cells (multiple CCs) to communicate with base station 10. In carrier aggregation, one primary cell and one or more secondary cells are used. Also, a PUCCH-SCell having a PUCCH may be used.

[0022] In the wireless communication system according to the embodiment of the present invention, the base station 10 is, for example, a wireless base station operated in 5G or 6G, and forms a cell. The cell is a relatively large cell, and is called a macrocell.

[0023] Base station 10A to base station 10D are base stations operated in 5G or 6G. Base station 10A to base station 10D form cells CA to D, respectively, which are smaller in size than a macro cell. Cells A to D may also be called small cells, macro cells, or the like. As shown in FIG. 1, cells A to D may be formed so as to be included in the macro cell.

[0024] A macrocell may generally be interpreted as a communication area with a radius of several hundred meters to several tens of kilometers that is covered by one base station, while a small cell may be interpreted as a general term for a cell that has low transmission power and covers a smaller area than a macrocell.

[0025] The base station 10 and the base stations 10A to 10D may be written as gNodeB (gNB) or BS (Base Station), etc. The terminal 20 may be written as UE or MS, etc. Furthermore, the specific configuration of the wireless communication system including the number and types of base stations and terminals is not limited to the example shown in FIG.

[0026] Furthermore, the wireless communication system is not necessarily limited to a wireless communication system conforming to 5G or 6G, and may be, for example, a next-generation 6G wireless communication system or a wireless communication system conforming to LTE.

[0027] As an example, the base station 10 and the base stations 10A to 10D perform wireless communication according to 5G or 6G with the terminal 20. The base station 10, the base stations 10A to 10D, and the terminal 20 may support Massive MIMO, which generates a more directional beam by controlling wireless signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which uses aggregating multiple component carriers (CCs), Dual Connectivity (DC), which simultaneously communicates between the terminal 20 and each of two NG-RAN nodes, and Integrated Access and Backhaul (IAB), which integrates wireless backhaul between wireless communication nodes such as gNBs and wireless access to the terminal 20.

[0028] The wireless communication system may also support higher frequency bands than the following frequency ranges (FR) defined in 3GPP Release 15. For example, 410 MHz-7.125 GHz may be supported as FR1, and 24.25 GHz-52.6 GHz as FR2. Furthermore, the wireless communication system may support a frequency band exceeding 52.6 GHz up to 114.25 GHz. This frequency band may be called the millimeter wave band.

[0029] Here, a base station 10 that supports massive MIMO can transmit beams. Massive MIMO generally refers to MIMO communication using an antenna with 100 or more antenna elements, which enables faster wireless communication than conventional methods by multiplexing multiple streams. Advanced beamforming is also possible. The beam width can be dynamically changed depending on the frequency band used or the status of the terminal 20. Furthermore, the use of narrow beams can increase the received signal power due to the beamforming gain. Furthermore, effects such as reduced interference and more effective use of wireless resources are expected.

[0030] The wireless communication system may also include a wireless repeater 30. In an embodiment of the present invention, the wireless repeater 30 may be, for example, a reflector (RIS), a metamaterial functional device, a battery-less device, a phase-controlled reflector, a passive repeater, an IRS (Intelligent Reflecting Surface), a smart repeater, or a network-controlled repeater. Specific examples of the reflector (RIS) include those called metamaterial reflectors, dynamic metasurfaces, and metasurface lenses (see, for example, Non-Patent Document 2).

[0031] In an embodiment of the present invention, the wireless relay device 30 relays, for example, 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," "concentration (concentrating radio waves at approximately one point)," and "diffraction." The terminal 20 can receive the wireless signal relayed by the wireless relay device 30. Furthermore, the wireless relay device 30 may relay a wireless signal transmitted from the terminal 20, or may relay a wireless signal transmitted from the base station 10.

[0032] As an example, the wireless relay device 30 can change the phase of a wireless signal relayed to the terminal 20. From this perspective, the wireless relay device 30 may be called a variable-phase reflector. In the present embodiment, the wireless relay device 30 may have a function of changing the phase of a wireless signal to relay it, but this is not limited to this. The wireless relay device 30 may also be called a RIS, a repeater, a relay device, a reflect array, a transmit array, or the like.

[0033] In the embodiment of the present invention, the wireless relay device 30 may be defined as having the functions shown in 1)-5) below.

[0034] 1) The terminal 10 may have a function for receiving signals transmitted from the base station 10. The signals may be DL signals such as SSB (SS / PBCH block), PDCCH, PDSCH, DM-RS (Demodulation Reference Signal), PT-RS (Phase Tracking Reference Signal), CSI-RS (Channel Status Information Reference Signal), and RIS-dedicated signals. The terminal 10 may have a function for receiving signals carrying information related to metamaterial functions. In addition, the terminal 10 may have a transmission function for transmitting the signals to the terminal 20.

[0035] 2) It may have a function of transmitting signals to the base station 10. The signals may be UL signals such as PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, and RIS-dedicated signals. It may have a function of transmitting information related to metamaterial functions. It may also have a receiving function of receiving the signals from the terminal 20.

[0036] 3) It may have a function of frame synchronization with the base station 10. It may also have a function of frame synchronization with the terminal 20.

[0037] 4) The base station 10 may have a function of reflecting a signal transmitted 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), beam selection and application, and spatial filter / precoding weight selection and application). 5) It may have a function of changing the power of a signal transmitted from the base station 10 or the terminal 20. For example, the power change function may be power amplification.

[0038] Furthermore, "receive and transmit" or "relay" in a wireless relay device 30 such as a RIS or smart repeater may mean that up to function A below is performed, but transmission is performed without up to function B below. Function A: Apply a phase shifter. Function B: No compensation circuit (e.g., amplifier, filter) is used.

[0039] Another example is Function A: Apply phase shifters and compensation circuits. Function B: No frequency conversion is involved.

[0040] In addition, when the phase is changed in the wireless relay device 30 such as the RIS, the amplitude may be amplified. Furthermore, "relaying" in the wireless relay device 30 such as the RIS may mean transmitting a received signal as is without performing processing at the layer 2 or layer 3 level, transmitting a received signal at the physical layer level as is, or transmitting a received signal as is without interpreting the signal (in this case, the phase may be changed or the amplitude may be amplified).

[0041] (Device configuration) Next, a description will be given of examples of functional configurations of the base station 10, the terminal 20, and the wireless relay device 30 that execute processes and operations according to the embodiment of the present invention. The base station 10, the terminal 20, and the wireless relay device 30 each include functions for executing the embodiments described below. However, the base station 10, the terminal 20, and the wireless relay device 30 may each include only one of the functions of the embodiments.

[0042] <Base station 10> Fig. 2 is a diagram showing an example of the functional configuration of a base station according to an embodiment of the present invention. As shown in Fig. 2, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 2 is merely an example. The names of the functional divisions and functional units may be any as long as they can perform the operations according to the embodiment of the present invention. The transmitting unit 110 and the receiving unit 120 may be called a communication unit.

[0043] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals. The transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to the terminal 20. The transmitter 110 also transmits setting information, etc., which will be described in the embodiments.

[0044] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in a storage device, and reads out the information from the storage device as needed. The control unit 140 performs, for example, resource allocation and overall control of the base station 10. Note that the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120. Furthermore, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.

[0045] <Terminal 20> Fig. 3 is a diagram showing an example of the functional configuration of a terminal according to an embodiment of the present invention. As shown in Fig. 3, terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 3 is merely an example. The names of the functional divisions and functional units may be any as long as they can perform the operations according to the embodiment of the present invention. The transmitting unit 210 and the receiving unit 220 may be called a communication unit.

[0046] The transmitter 210 generates a transmission signal from transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The transmitter 210 also transmits HARQ-ACK, and the receiver 220 receives setting information and the like described in the embodiments.

[0047] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device, and reads it out from the storage device as needed. The setting unit 230 also stores setting information that is set in advance. The control unit 240 performs overall control of the terminal 20. Note that the functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220. Note that the transmitting unit 210 and the receiving unit 220 may be called a transmitter and a receiver, respectively.

[0048] <Wireless relay device 30> Fig. 4 is a diagram showing an example of the functional configuration of a wireless relay device according to an embodiment of the present invention. As shown in Fig. 4, wireless relay device 30 has a transmitting unit 310, a receiving unit 320, a control unit 330, a variable unit 340, and an antenna unit 350. The functional divisions and names of the functional units may be any names as long as they can perform the operations according to the embodiment of the present invention. Transmitting unit 310 and receiving unit 320 may be called a communication unit.

[0049] The antenna unit 350 includes at least one antenna connected to the variable unit 340. For example, the antenna unit 350 may be arranged as an array antenna. In the embodiment of the present invention, the antenna unit 350 may be particularly referred to as a relay antenna. The variable unit 340 and the antenna unit 350 may also be referred to as a relay unit.

[0050] 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 may be a variable phase shifter, a phase shifter, an amplifier, etc. For example, by changing the phase of the radio waves that reach the relay antenna from the radio wave generating source, it is possible to change the direction or beam of the radio waves.

[0051] The control unit 330 is a control means for controlling 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 radio waves from the base station 10 or the terminal 20 without signal interpretation. Here, the control unit 330 may change the relay state based on control information received from the base station 10 or the terminal 20 via the communication unit, or may change the relay state based on the reception state of the radio waves from the base station 10 or the terminal 20. For example, the control unit 330 may select appropriate reception beams and transmission beams (directions) based on control information such as SSB, and control the variable unit 340. Similarly, the control unit 330 may select an appropriate combination of reception direction and transmission direction based on criteria such as the highest reception quality or the highest received power from the reception state, and control the variable unit 340.

[0052] Furthermore, in the embodiment of the present invention, the control unit 330 can control the variable unit 340 based on, for example, information about the propagation path between the terminal 20 or the base station 10A and the antenna unit 350 (including information estimated from the reception state and control information; the same applies below). For example, the control unit 330 can relay the radio wave received from the base station 10A to a specific direction such as the radio wave receiving destination (terminal 20 in this case) by changing the phase without using transmission power, using a known method such as an active repeater or RIS. Specifically, the control unit 330 uses the estimated propagation path information H PT and H RP Based on this, the phase of the radio signal is controlled to be relayed to the terminal 20 or the base station 10A. That is, by changing the phase of an array antenna or the like based on the same principle as beamforming, radio waves can be relayed in a specific direction. Note that the radio relay device 30 controls (changes) only the phase of the radio signal (radio wave) using the control unit 330, and may relay the radio signal without power supply, without amplifying the power of the relayed radio signal.

[0053] Furthermore, in the embodiment of the present invention, the control unit 330 may acquire information according to the reception state. Furthermore, the receiving unit 320 may acquire control information from the base station 10A or the terminal 20. For example, the receiving unit 320 may receive various signals such as SSB (including the various signals exemplified in the above-mentioned functions) transmitted from the base station 10A or the terminal 20 as control information.

[0054] Furthermore, the control unit 330 calculates propagation path information (H PT and H RP ) may be estimated.

[0055] The propagation path information (propagation channel information) regarding each propagation path is specifically information such as amplitude or phase, and in the embodiment of the present invention, is information estimated regarding the propagation path of the radio wave arriving at the antenna unit 350. As an example, the control unit 330 may estimate the propagation path information of the antenna unit 350 based on a change in the received power when the phase of the variable unit 340 of the array-shaped antenna unit 350 is switched to orthogonal, using a principle similar to that of I / Q (In-phase / Quadrature) detection.

[0056] 5 is a diagram illustrating an example of the operation of a wireless relay device according to an embodiment of the present invention. As shown in FIG. 5, as an example, a wireless relay device 30 is interposed between a base station 10A (or another base station 10, etc.) and a terminal 20, and relays (reflects, transmits, aggregates, diffracts, etc.) wireless signals transmitted and received between the base station 10A and the terminal 20.

[0057] As a specific example, when the wireless quality is good, the base station 10A and the terminal 20 transmit and receive wireless signals directly without going through the wireless relay device 30. On the other hand, when the wireless quality deteriorates, for example, 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.

[0058] Specifically, the wireless relay device 30 calculates propagation path information H between the radio wave generating 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 a variable phase shifter is controlled. PT , H RT The propagation path information H is estimated, and the variable section 340 such as a variable phase shifter is controlled based on the estimated propagation path information to relay the radio signal to the radio wave receiving destination such as the terminal 20. PT , H RT The wireless relay device 30 may also relay a wireless signal to a radio wave receiving destination such as the base station 10A or the terminal 20 by controlling a variable unit 340 such as a variable phase shifter based on control information received from the base station 10A or the terminal 20.

[0059] Here, a propagation path or a propagation channel refers to an individual communication path for wireless communication, and in this case refers to a communication path between each transmitting and receiving antenna (such as a base station antenna and a terminal antenna in the figure).

[0060] As an example, the wireless relay device 30 includes an antenna unit 350 having a small multi-element antenna compatible with massive MIMO, and a variable unit 340 having a variable phase changer or phase shifter that changes the phase of a wireless signal, essentially, radio waves, to a specific phase, and uses the variable unit 340 to control the phase of the radio waves relayed to the terminal 20 or base station 10A.

[0061] FIG. 6 is a diagram illustrating an example of communication in a high-frequency band. As shown in FIG. 6, when a high-frequency band of several GHz to several tens of GHz or more is used, a blind zone is likely to occur due to the strong, directional nature of radio waves. When the base station 10A and the terminal 20 are line of sight, even when the high-frequency band is used, there is no effect on wireless communication between the base station 10A and the terminal 20. On the other hand, when the line of sight 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 significantly degraded. In other words, when the terminal 20 moves into a blind zone blocked by an obstruction, communication may be interrupted.

[0062] Considering the existence of applications (such as remote control) that take advantage of high speed, large capacity, and low latency characteristics, it is important to eliminate blind spots, ensure communication within the wireless communication system, and ensure connections between base stations and terminals.

[0063] Therefore, technologies have 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 smart repeaters. In this way, by controlling the propagation characteristics of the base station signal, it is possible to improve communication characteristics, expand coverage without the need for a signal source, and reduce installation and operation costs by adding base stations.

[0064] Conventional radio wave propagation control devices are classified into passive and active types. Passive types have the advantage of not requiring control information, but are unable to keep up with changes in the mobile object or environment. On the other hand, active types have the disadvantage of requiring control information and increasing overhead, but can variably control the propagation characteristics of radio waves by changing the load (phase) state of the control antenna, and can keep up with changes in the mobile object and environment.

[0065] There are two types of active radio wave propagation control devices and control methods: a feedback (FB) model and a propagation path information model. In the FB model, a variable radio wave propagation control device randomly changes the load (phase) state and has terminal 20 or the like provide feedback on the communication state, thereby searching for optimal conditions. On the other hand, in the propagation path information model, the load state is determined based on propagation path information between the base station and the radio wave propagation control device, enabling optimal radio wave propagation control. Either type can be applied to the embodiments of the present invention.

[0066] In addition, there are various types of relay methods, such as reflection, transmission, diffraction, and aggregation. In this embodiment, as an example, reflective and transmission type configurations will be described below (for diffraction and aggregation types, see Non-Patent Document 2, etc.).

[0067] Fig. 7 is a diagram illustrating an example of a reflective radio relay device according to an embodiment of the present invention. An example of the system configuration of a reflective radio relay device 30 will be described with reference to Fig. 7. Fig. 7 is a diagram illustrating the relationship between a transmitting antenna Tx of a base station 10A or the like, a relay antenna Sx of a transparent radio relay device 30, and a receiving antenna Rx of a terminal 20 or the like. As shown in Fig. 7, the embodiment of the present invention uses MIMO as an example, in which there are multiple propagation paths between Tx and Sx and multiple propagation paths between Sx and Rx, and the radio relay device 30 relays radio waves by controlling a variable unit 340 having a variable phase shifter or the like of the relay antenna Sx.

[0068] In the case of a reflective type, the arrayed relay antennas are arranged facing the same direction, as shown in Figure 7. This allows the propagation path of the relay antenna to be estimated based on the reception state observed when the phase conditions of the relay antenna are changed multiple times.

[0069] FIG. 8 is a diagram illustrating an example of a transmission-type wireless relay device according to an embodiment of the present invention. An example of the system configuration of a transmission-type wireless relay device 30 will be described with reference to FIG. 8. FIG. 8 illustrates the relationship between a transmitting antenna Tx of a base station 10A or the like, a relay antenna Sx of the transmission-type wireless relay device 30, and a receiving antenna Rx of a terminal 20 or the like. As shown in FIG. 8, the embodiment of the present invention uses MIMO as an example, with multiple propagation paths between Tx and Sx and multiple propagation paths between Sx and Rx. As illustrated, the wireless relay device 30 relays radio waves arriving from one side to the other side via a variable unit 340 such as a variable phase shifter of the relay antenna Sx. In this way, in the case of the transmission-type wireless relay device, the reference antenna on the left side of the figure and the relay antenna on the right side of the figure are arranged as a pair, facing in opposite directions, so that radio waves arriving from one side can be relayed to the other side. Whether the transmission-type or reflection-type wireless relay device is a transmission-type or a reflection-type wireless relay device, a power detector or the like may be configured to detect the power received at the relay antenna to measure the reception status. Furthermore, the propagation path of the relay antenna can be estimated based on the received signal observed when the phase condition of the relay antenna is changed multiple times.

[0070] Future networks, such as 6G, will require even higher quality than 5G. For example, they will require ultra-high speeds on the order of terabits per second and high reliability and low latency on the level of optical communications. To achieve this quality, the use of extremely high frequencies, such as terahertz waves, is anticipated. While the use of extremely high frequencies such as terahertz waves offers the expected advantages of high speeds due to the use of ultra-wideband and low latency due to short symbol lengths, it also has the expected disadvantages of narrow coverage due to high attenuation rates and reduced reliability due to high directivity. It is therefore necessary to consider how to ensure redundancy at each location where 6G communications are required, i.e., how to increase the number of communication transmission points.

[0071] As described above, the wireless relay device 30 reflects or transmits a beam transmitted from the base station 10 or the terminal 20 in a predetermined direction and delivers the beam to the terminal 20 or the base station 10. The wireless relay device 30 may be, for example, a passive RIS, an active RIS, or the like. A passive RIS is a device that does not change control of the reflection angle or beam width according to the position of the mobile station, and does not require control information, but precise beam control is difficult. An active RIS is a device that changes control of the reflection angle and beam width according to the position of the mobile station, and allows precise beam control, but requires control information, which increases overhead. The wireless relay device 30 can increase the number of communication transmission points.

[0072] The wireless relay device 30 may be any device that has a predetermined function, and the predetermined function may be, for example, at least one of the following functions 1) and 2).

[0073] 1) UE function The radio relay device 30 may have a function of receiving signals (e.g., DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, and RIS-dedicated signals) transmitted from the base station 10. The radio relay device 30 may use the receiving function to receive information related to the metamaterial function (2) below.

[0074] The radio relay device 30 may also have a function of transmitting signals (e.g., UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, and RIS-dedicated signals) to the base station 10. The radio relay device 30 may use the transmission function to transmit information related to the metamaterial function (2) below. The radio relay device 30 may also have a function of frame synchronization with the base station 10.

[0075] 2) Metamaterial function The wireless relay device 30 may have a reflection function (e.g., phase change) of a signal transmitted from the base station 10 or the terminal 20. The wireless relay device 30 may reflect a signal by changing the phase for each of the multiple reflecting elements included in the wireless relay device 30, or may reflect a signal by performing a common phase change across the multiple reflecting elements.

[0076] The wireless relay device 30 may also have a function related to beam control (e.g., a function related to TCI-state and QCL control, a beam selection and application, and a spatial filter / precoding weight selection and application). The wireless relay device 30 may also have a power change function (e.g., power amplification) of a signal transmitted from the base station 10 or the terminal 20. The wireless relay device 30 may perform different power changes for each reflecting element included in the wireless relay device 30, or may perform a common power change for multiple reflecting elements.

[0077] "Receiving and transmitting" in the wireless relay device 30 may mean reflecting radio waves / signals. The terms "base station" and "terminal" are used hereinafter, but are not limited to these and may be replaced with communication devices.

[0078] The wireless relay device 30 according to this embodiment may be assumed as follows. The BW operator installs the wireless repeater device 30. The wireless relay device 30 is fixed and does not move. The wireless relay device 30 relays signals transmitted from only one base station. The wireless relay device 30 is capable of receiving and transmitting control signals. The wireless relay device 30 operates in half-duplex mode. The wireless relay device 30 operates in a Single-RIS environment.

[0079] (Previous problems) Conventionally, there is no standard for a method for wireless repeater devices to appropriately amplify and control signals, which can lead to the problem of excessive signal amplification and oscillation. Specifically, signals amplified by a wireless repeater are attenuated along various paths before arriving at the wireless repeater. If the amount of amplification exceeds the amount of attenuation, the rate at which the signal is amplified is faster than the rate at which it is attenuated, resulting in oscillation.

[0080] (Outline of this embodiment) Therefore, in this embodiment, a method for a wireless relay device to appropriately amplify and control a signal will be described. Hereinafter, examples 1 to 5 will be described as specific examples.

[0081] Example 1 In this embodiment, an example will be described in which the wireless relay device 30 transmits and receives a signal for recognizing the capability of the wireless relay device 30 to and from the base station 10.

[0082] For example, the wireless relay device 30 may report to the base station 10 capability information indicating at least one of the following: ·Whether the amplification value can be changed Maximum amplification value (for example, the maximum amplification value within the range where oscillation does not occur) Minimum amplification value Step value used to represent each amplification value (or each transmission power after relaying) (see Figure 9) - Total number of steps indicating the amplification value (or transmission power after relaying) Maximum transmission power after relaying (for example, it may be the maximum transmission power within the range where oscillation does not occur) Minimum transmission power after relay The distance attenuation or distance required to prevent oscillation from occurring between the base station 10 (or the terminal 20) and the wireless relay device 30 when transmitting with the transmission power after each relay - Processing time required from receiving control information to changing the amplification value The processing time required from receiving control information to turning the relay function on or off (turning the relay function on or off may also mean enabling or disabling the relay function) -Whether or not there is an oscillation prevention function Maximum transmission power of control information Applicability of each example described below Applicability of each option or plan in each example described below

[0083] The wireless relay device 30 may report the above-mentioned capability information individually for each frequency (FR1, FR2, FR2-1, FR2-2 or SCS).

[0084] 9 is a diagram for explaining step values ​​according to Example 1 of the embodiment of the present invention. The step values ​​of the above-mentioned amplification values ​​(or each transmission power after amplification) are values ​​corresponding to one division that evenly divides the range of values ​​that can be taken as the amplification value (the range between the maximum amplification value and the minimum amplification value).

[0085] According to this embodiment, the base station 10 can control the signal amplification by the wireless relay device 30 based on the capability information received from the wireless relay device 30 .

[0086] Example 2 In this embodiment, an example will be described in which the wireless relay device 30 receives information indicating the amplification value (or the transmission power after relaying) from the base station 10 and applies the information.

[0087] Example 2-1 The wireless relay device 30 may receive information indicating the amplification value (or the transmission power after relaying). Here, the wireless relay device 30 may update the amplification value by one of the following options.

[0088] <Option 1> The wireless relay device 30 may receive and apply control information that indicates the absolute value of the amplification value (or the transmission power after relaying). That is, the wireless relay device 30 may perform open-loop control.

[0089] For example, when the wireless relay device 30 receives control information indicating an amplification value of 5 dB, it transmits a relay signal with a transmission power that is 5 dB greater than the received signal. Also, when the wireless relay device 30 receives control information indicating an absolute value of the transmission power after relaying of 23 dBm, it transmits a relay signal with a transmission power of 23 dBm, which is the result of amplifying the received signal.

[0090] <Option 2> The wireless relay device 30 may receive and apply control information indicating the difference in the amplification value (or the transmission power after relaying). That is, the wireless relay device 30 may perform closed-loop control.

[0091] Furthermore, the wireless relay device 30 may transmit information indicating the received power before relaying, the transmitted power after relaying, or the amplification value as feedback information to the base station 10. Based on the received feedback information, the base station 10 transmits control information indicating the absolute value or difference of the amplification value (or the transmitted power after relaying) to the wireless relay device 30. Based on the feedback information, the base station 10 may also transmit control information indicating the absolute value of the amplification value (or the transmitted power after relaying) to the wireless relay device 30.

[0092] For example, when the wireless relay device 30 receives control information indicating a difference in amplification value of +2 dB, it transmits a relay signal with transmission power obtained by amplifying the received signal by an amplification value obtained by adding 2 dB to the amplification value before application.Furthermore, when the wireless relay device 30 receives control information indicating a difference in transmission power after relaying by +2 dB, it transmits a relay signal with transmission power obtained by adding 2 dB to the transmission power before application.

[0093] In each of the above-mentioned options, if the post-relay transmission power specified by the base station 10 exceeds the maximum transmission power of the wireless relay device 30, the wireless relay device 30 may apply an amplification value that results in the maximum transmission power.

[0094] 10 is a diagram illustrating an example of a method for updating an amplification value according to Example 2 of the embodiment of the present invention. The wireless relay device 30 determines whether the post-relay transmission power based on an instruction from the base station 10 exceeds the maximum transmission power, and if it determines that the post-relay transmission power exceeds the maximum transmission power, it may apply the maximum transmission power as the post-relay transmission power.

[0095] In each of the above options, if the amplification value specified by the base station 10 exceeds the maximum amplification value of the wireless relay device 30, the wireless relay device 30 may apply the maximum amplification value instead.

[0096] In each of the above-mentioned options, if the post-relay transmission power specified by the base station 10 falls below the minimum transmission power of the wireless relay device 30, the wireless relay device 30 may apply an amplification value that results in the minimum transmission power.

[0097] In each of the above options, if the amplification value specified by the base station 10 is lower than the minimum amplification value of the wireless relay device 30, the wireless relay device 30 may apply the minimum amplification value instead.

[0098] The wireless relay device 30 may decide which of the above options to use based on the capabilities of the wireless relay device 30 or the signal received from the base station 10 .

[0099] (Example 2-2) The wireless relay device 30 may determine the post-relay transmission power so that oscillation does not occur. For example, when the wireless relay device 30 receives an instruction from the base station 10 to set an amplification value (or post-relay transmission power) that exceeds the range in which oscillation does not occur, the wireless relay device 30 may perform one of the following operations.

[0100] <Plan 1> The wireless relay device 30 may stop relaying. That is, the wireless relay device 30 may set the transmission power to 0 after relaying.

[0101] <Plan 2> The wireless relay device 30 may reduce the amplification value (or the transmission power after relaying) to a value at which oscillation does not occur.

[0102] In either of the above-mentioned schemes, the value at which oscillation occurs may be the amplification value (or the transmission power after relaying) when the wireless relay device 30 detects the oscillation, or may be a value specified by the base station 10.

[0103] The radio relay device 30 may determine which of the above-mentioned methods to apply based on a predetermined rule or a signal from the base station (for example, RRC / MAC-CE / DCI, etc.).

[0104] (Example 2-3) When the wireless relay device 30 detects that an oscillation has occurred, it may take one of the following optional actions.

[0105] <Option 1> The radio relay device 30 may determine the post-relay transmission power so as not to cause oscillation.

[0106] <Option 2> The wireless relay device 30 may report the occurrence of oscillation to the base station 10. Here, the wireless relay device 30 may report the amplification value (or the transmission power after relaying) when the oscillation occurred. The wireless relay device 30 may also report at least one of the beam directed when the oscillation occurred, the beam direction, and the terminal 20 to which the beam was directed.

[0107] The wireless relay device 30 may have an oscillation prevention function and determine whether oscillation is occurring by observing the waveform at the time of reception.

[0108] (Examples 2-4) The radio relay device 30 may associate the amplification value (or the transmission power after relaying) with the received bit information or the transmitted bit information.

[0109] For example, the wireless relay device 30 may determine the association between the absolute value (or difference) of the amplification value or the absolute value (or difference) of the transmission power after relaying and the received bit information based on a predetermined rule.

[0110] Furthermore, the wireless relay device 30 may set the association between the absolute value (or difference) of the amplification value or the absolute value (or difference) of the transmission power after relaying and the received bit information based on the signal received from the base station 10.

[0111] The wireless relay device 30 may also determine or set the association depending on the type of the wireless relay device 30 (depending on the maximum transmission power after amplification, the step value of the amplification value (or the transmission power after relay), etc.).

[0112] (Examples 2-5) The wireless relay device 30 may receive a signal including information indicating an amplification value (or transmission power after relaying) (hereinafter also referred to as amplification value information) as follows.

[0113] The radio relay device 30 may receive the amplification value information in a physical signal or a higher layer signal (for example, RRC / MAC-CE / DCI).

[0114] Here, the radio relay device 30 may determine whether the DCI is addressed to itself based on the RNTI with which the CRC of the DCI is scrambled. For example, the radio relay device 30 may determine whether the signal including the amplification value information is addressed to itself based on an RNTI that identifies one radio relay device 30 (e.g., C-RNTI). Alternatively, the radio relay device 30 may determine whether the signal is addressed to itself based on RNTIs that identify multiple radio relay devices 30.

[0115] The radio relay device 30 may share the RNTI with the terminal 20, or may use an RNTI dedicated to the radio relay device 30. The radio relay device 30 may determine which of the DCI fields is addressed to itself based on the settings of an upper layer.

[0116] For example, the radio relay device 30 may set a group in a higher layer and determine that a field of DCI scrambled with an RNTI corresponding to the set group is addressed to itself. Alternatively, the radio relay device 30 may set each DCI format in a higher layer and determine that a field of DCI scrambled with the corresponding RNTI is addressed to itself.

[0117] (Examples 2-6) The wireless relay device 30 may perform any of the following operations for relaying uplink communication and relaying downlink communication.

[0118] <Plan 1> The wireless relay device 30 may apply a common amplification value (or transmission power after relaying) to the relaying of the uplink communication and the relaying of the downlink communication.

[0119] <Plan 2> The wireless relay device 30 may apply different amplification values ​​(or transmission power after relaying) to relaying uplink communication and relaying downlink communication. For example, the wireless relay device 30 may apply the differential value received in closed-loop control to both the amplification value when relaying uplink communication and the amplification value when relaying downlink communication, or may apply the differential value independently to each. The wireless relay device 30 may determine whether to apply the differential value to both uplink communication and downlink communication or independently based on a predetermined rule or a signal (RRC / MAC-CE / DCI) received from the base station 10.

[0120] (Examples 2-7) The wireless relay device 30 may apply the amplification value (or the transmission power after relaying) between the wireless relay device 30 and the multiple terminals 20 in one of the following ways.

[0121] <Plan 1> The wireless relay device 30 may apply a common amplification value (or a common transmission power after relaying) to a plurality of terminals 20.

[0122] According to the first scheme, the wireless relay device 30 does not need to recognize between the base station 10 and which terminal 20 the signal is to be relayed.

[0123] <Plan 2> The radio relay device 30 may apply a different amplification value (or transmission power after relaying) to each terminal 20.

[0124] According to the second proposal, the wireless relay device 30 can apply the necessary amplification value (or post-relay transmission power) for each terminal 20.

[0125] <Plan 3> The radio relay device 30 may apply a different amplification value (or transmission power after relaying) to each group including a plurality of terminals 20.

[0126] According to the third plan, the wireless relay device 30 can apply a necessary amplification value (or post-relay transmission power) to each group including a plurality of terminals 20.

[0127] The radio relay device 30 may determine which of the above-mentioned schemes to apply based on a predetermined rule or a signal from a base station (e.g., RRC / MAC-CE / DCI, etc.) The radio relay device 30 may also apply different schemes for uplink communication and downlink communication.

[0128] (Examples 2-8) The wireless relay device 30 may determine the transmission power of the control information related to the control of the wireless relay device 30 and the transmission power after relaying in the uplink communication by applying one of the following methods.

[0129] 11 is a diagram illustrating transmission of control information of a wireless relay device according to Example 2 of the embodiment of the present invention. The wireless relay device 30 transmits, to the base station 10, control information related to control of the wireless relay device 30 and a transmission signal that is a relayed uplink communication signal received from the terminal 20.

[0130] <Plan 1> The radio relay device 30 may apply the same transmission power to the transmission power of the control information and the transmission power after relaying in the uplink communication.

[0131] <Plan 2> The wireless relay device 30 may determine the transmission power of the control information and the transmission power after relaying in uplink communication using a partially identical process. For example, the wireless relay device 30 may use the same formula for determining the transmission power. In this case, the values ​​of each parameter may be set or determined separately for the transmission power of the control information and the transmission power after relaying in uplink communication.

[0132] Furthermore, for example, the radio relay device 30 may use, as a formula for determining the transmission power, a formula including a term common to the transmission power of the control information and the transmission power after relaying in the uplink communication.

[0133] Furthermore, for example, the wireless relay device 30 may use, as a formula for determining the transmission power, an equation that adds a term representing the difference between the transmission power of the control information and the transmission power after relaying in the uplink communication.

[0134] <Plan 3> When determining the transmission power of the control information and the transmission power after relay in the uplink communication, the radio relay device 30 may determine the transmission power using different processes.

[0135] The radio relay device 30 may determine which of the above-mentioned methods to apply based on a predetermined rule, a signal from the base station (for example, RRC / MAC-CE / DCI, etc.), or the capabilities of the radio relay device 30.

[0136] (Examples 2-9) The radio relay device 30 may set the transmission of the control information and the maximum transmission power after relaying together or separately.

[0137] (Examples 2-10) When the radio relay device 30 transmits the control information and the relay signal simultaneously, the radio relay device 30 may set the total value of the transmission power.

[0138] For example, when the wireless relay device 30 transmits control information and a relay signal simultaneously, if the total value of the transmission power specified by the base station 10 exceeds the maximum transmission power, the wireless relay device 30 may determine each transmission power according to one of the following proposals.

[0139] <Plan 1> The wireless relay device 30 may prioritize determining the transmission power of the control information. For example, the wireless relay device 30 may set the transmission power of the control information as instructed by the base station 10 and determine the transmission power after relaying so that the total value of the transmission power does not exceed the maximum value.

[0140] <Plan 2> The wireless relay device 30 may prioritize determining the post-relay transmission power. For example, the wireless relay device 30 may set the post-relay transmission power as instructed by the base station 10 and determine the transmission power of the control information so that the total value of the transmission power does not exceed the maximum value.

[0141] <Plan 3> The wireless relay device 30 may determine the ratio between the transmission power of the control information instructed by the base station 10 and the transmission power after relaying. For example, the wireless relay device 30 may determine the transmission power of the control information and the transmission power after relaying so that "the total transmission power does not exceed the maximum value" and "the ratio is the same as the value instructed by the base station 10."

[0142] The radio relay device 30 may determine which of the above-mentioned methods to apply based on a predetermined rule, a signal from the base station (for example, RRC / MAC-CE / DCI, etc.), or the capabilities of the radio relay device 30.

[0143] (Example 2-11) The wireless relay device 30 may be set with a default amplification value (or a default transmission power after relaying).

[0144] For example, before receiving information (amplification value information) regarding the amplification value (or transmission power after relaying) from the base station 10, the wireless relay device 30 may determine the amplification value (transmission power after relaying) to be applied based on one of the following proposals.

[0145] <Plan 1> The wireless relay device 30 may determine the amplification value (transmission power after relaying) to be applied based on a predetermined rule.

[0146] For example, the radio relay device 30 may apply a minimum or maximum amplification value (or post-relay transmission power).

[0147] Alternatively, the wireless relay device 30 may not perform relaying (transmission power after relaying = 0), or the wireless relay device 30 may make the reception power before relaying and the transmission power after relaying the same (amplification value = 0).

[0148] <Plan 2> The wireless relay device 30 may receive information indicating the amplification value (transmission power after relay) to be applied at the time of connection from the base station 10, and may determine the amplification value (transmission power after relay) to be applied based on the received information.

[0149] Example 3 The wireless relay device 30 may determine the processing time required from receiving information (amplification value information) indicating the amplification value (or the transmission power after relaying) from the base station 10 until updating the amplification value, as follows.

[0150] (Example 3-1) The wireless relay device 30 may use one of the following options to determine the processing time required for updating.

[0151] <Option 1> The wireless relay device 30 may determine the processing time required for updating based on a predetermined rule.

[0152] <Option 2> The wireless relay device 30 may determine the processing time required for updating based on the parameters reported to the base station 10 as the capabilities of the wireless relay device 30.

[0153] (Example 3-2) The wireless relay device 30 may set the processing time required for updating to one of the following methods.

[0154] <Plan 1> The wireless relay device 30 may set the processing time required for updating to be the processing time (for example, subframe / slot / symbol / millisecond) required from receiving the amplification value information until updating.

[0155] <Plan 2> The radio relay device 30 may set the processing time required for updating as the processing time (for example, subframe / slot / symbol / millisecond) required from receiving the amplification value information and returning HARQ-ACK for that signal until updating.

[0156] The wireless relay device 30 may apply either the proposal 1 or the proposal 2 by changing the amplification value information to information indicating whether the relay function is on or off. That is, the wireless relay device 30 may set the processing time required to change the relay function on or off to either of the proposals described above.

[0157] Example 4 The wireless relay device 30 may select one of the following options as the timing for applying the amplification value information instructed by the base station 10.

[0158] <Option 1> The radio relay device 30 may apply the received amplification value information from the symbol or slot X subframes / slots / symbols / milliseconds after receiving the amplification value information from the base station 10 .

[0159] The radio relay device 30 may determine the value of X from among values ​​equal to or greater than 0 based on a predetermined rule, a signal from a base station (for example, RRC / MAC-CE / DCI, etc.), or the capabilities of the radio relay device 30.

[0160] <Option 2> The radio relay device 30 may receive amplification value information from the base station 10 and apply the received content from the symbol or slot X subframes / slots / symbols / milliseconds after transmitting the HARQ-ACK information corresponding to that signal.

[0161] The radio relay device 30 may determine the value of X from among values ​​equal to or greater than 0 based on a predetermined rule, a signal from a base station (for example, RRC / MAC-CE / DCI, etc.), or the capabilities of the radio relay device 30.

[0162] The radio relay device 30 may determine which of the above options to apply based on a predetermined rule, a signal from the base station (e.g., RRC / MAC-CE / DCI, etc.), or the capabilities of the radio relay device 30.

[0163] The wireless relay device 30 may change the amplification value information to information indicating whether the relay function is on or off and apply the information in either option 1 or option 2. That is, the wireless relay device 30 may set the timing of applying the information indicating whether the relay function is on or off to any of the above-mentioned options.

[0164] The wireless relay device 30 may assume that the base station 10 will not transmit a signal instructing the wireless relay device 30 to update the transmission power before the time required for the processing calculated by the method shown in the third embodiment has elapsed.

[0165] In addition, if the wireless relay device 30 is instructed by the base station 10 to update the transmission power before the time required for processing calculated by the method shown in Example 3 has elapsed, the wireless relay device 30 may operate in one of the following ways.

[0166] <Plan 1> The radio relay device 30 may not apply the corresponding transmission power update instruction.

[0167] <Plan 2> The wireless relay device 30 may apply the update of the corresponding transmission power after the time required for the processing calculated by the method shown in the third embodiment has elapsed.

[0168] The radio relay device 30 may determine which of the above-mentioned methods to apply based on a predetermined rule, a signal from the base station (for example, RRC / MAC-CE / DCI, etc.), or the capabilities of the radio relay device 30.

[0169] In either the plan 1 or the plan 2, the wireless relay device 30 may apply the amplification value information by changing it to information indicating whether the relay function is on or off.

[0170] 12 is a diagram illustrating the timing of applying received information according to option 1 of example 4 of the embodiment of the present invention. The wireless relay device 30 may apply the received information from the symbol or slot X subframes / slots / symbols / milliseconds after receiving information indicating whether the relay function is on or off from the base station 10.

[0171] 13 is a diagram illustrating the timing of applying received information according to option 2 of example 4 of the embodiment of the present invention. The wireless relay device 30 may receive information indicating whether the relay function is on or off from the base station 10, and apply the received information from a symbol or slot X subframes / slots / symbols / milliseconds after transmitting HARQ-ACK information corresponding to the received information.

[0172] In this way, the wireless relay device 30 may operate in one of the above-mentioned ways when the base station 10 instructs the wireless relay device 30 to turn on / off the relay function before the time required for processing calculated by the method shown in Example 3 has elapsed.

[0173] Example 5 The radio relay device 30 may operate in one of the following options with respect to multiplexing the transmission and reception of control information and the transmission and reception of relay signals.

[0174] <Option 1> The wireless relay device 30 does not need to transmit and receive control information and relay signals simultaneously (TDM: Time Division Multiplex).

[0175] <Option 1-1> The wireless relay device 30 does not need to transmit the control information and the relay signal at the same time.

[0176] <Option 1-2> The wireless relay device 30 does not need to receive the control information and the relay signal at the same time.

[0177] The wireless relay device 30 may assume that it is not instructed to transmit (or receive) the control information and the relay signal simultaneously.

[0178] When the wireless relay device 30 receives an instruction from the base station 10 to simultaneously transmit (or receive) control information and a relay signal, the wireless relay device 30 may decide to transmit (or receive) only the control information or the relay signal based on a predetermined rule or an instruction from the base station 10 (e.g., an upper layer signal / physical layer signal).

[0179] <Option 2> The wireless relay device 30 does not need to transmit and receive the control information and the relay signal in the same frequency band (FDM: Frequency Division Multiplex).

[0180] <Option 2-1> The wireless relay device 30 does not need to transmit the control information and the relay signal in the same frequency band.

[0181] <Option 2-2> The wireless relay device 30 does not need to receive the control information and the relay signal in the same frequency band.

[0182] The wireless relay device 30 may assume that it is not instructed to transmit (or receive) the control information and the relay signal in the same frequency band.

[0183] When the wireless relay device 30 receives an instruction from the base station 10 to transmit (or receive) the control information and the relay signal in the same frequency band, the wireless relay device 30 may decide to transmit (or receive) only the control information or the relay signal based on a predetermined rule or an instruction from the base station 10 (e.g., an upper layer signal / physical layer signal).

[0184] The wireless relay device 30 may apply Option 2 (limited to either FDM or TDM) only when transmitting and receiving control information and relay signals simultaneously.

[0185] <Option 3> The wireless relay device 30 may transmit and receive the control information and the relay signal simultaneously and in the same frequency band, or may transmit and receive only one of them.

[0186] When transmitting control information and a relay signal simultaneously, the wireless relay device 30 may determine the transmission power based on the method described in the second embodiment.

[0187] The radio relay device 30 may determine which of the above options to apply based on a predetermined rule, a signal from the base station (e.g., RRC / MAC-CE / DCI, etc.), or the capabilities of the radio relay device 30.

[0188] In each of the above-described embodiments, the base station 10 may be replaced with the terminal 20. That is, the terminal 20 may transmit information for controlling the wireless relay device 30 to the wireless relay device 30. In this way, for example, when a user of the terminal 20 installs the wireless relay device 30, the user can control the wireless relay device 30 using the terminal 20.

[0189] Furthermore, the wireless relay device 30 may relay communications (for example, sidelink communications) between a plurality of terminals 20. In this case, too, the base station 10 may be replaced with the terminal 20 in each of the above-described embodiments.

[0190] The wireless relay device and communication device of the present embodiment may be configured as the wireless relay device and communication device shown in the following items. Also, the following wireless relay method may be implemented.

[0191] <Configuration of this embodiment> (Section 1) a transmitter that transmits capability information to the base station, the capability information indicating whether or not control information and relay signals can be transmitted simultaneously in communication between the base station and the terminal; a communication unit that relays communication between the base station and the terminal; Equipped with the transmitting unit simultaneously transmits the control information and the relay signal. Radio repeater device. (Section 2) The transmitter transmits a Physical Random Access Channel (PRACH) to the base station. 2. The wireless relay device according to claim 1. (Section 3) The radio relay device further includes a receiving unit that receives SSB and CSI-RS from the base station. 2. The wireless relay device according to claim 1. (Section 4) the wireless relay device uses dedicated identification information to identify control information for the wireless relay device; 2. The wireless relay device according to claim 1. (Section 5) transmitting capability information to the base station, the capability information indicating whether or not control information and relay signals can be transmitted simultaneously in communication between the base station and the terminal; relaying communication between the base station and the terminal; and The control information and the relay signal are transmitted simultaneously. A communication method using a wireless relay device.

[0192] Any of the above configurations provides a technique for defining the operation of transmitting and receiving control information and relay signals by a wireless relay device.

[0193] (Hardware configuration) The block diagrams (FIGS. 2, 3, and 4) used in the description of the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0194] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0195] For example, the base station 10, the terminal 20, the wireless relay device 30, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 14 is a diagram illustrating an example of the hardware configuration of the base station 10, the terminal 20, and the 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 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0196] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configurations of the base station 10, the terminal 20, and the wireless relay device 30 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0197] Each function in the base station 10, terminal 20 and wireless relay device 30 is realized by loading predetermined software (programs) onto hardware such as processor 1001, memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in memory device 1002 and auxiliary memory device 1003.

[0198] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0199] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 2 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 3 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0200] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0201] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0202] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0203] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0204] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0205] Furthermore, the base station 10, the terminal 20, and the wireless relay device 30 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0206] Furthermore, the wireless relay device 30 may include, as necessary, a variable phase shifter, a phase shifter, an amplifier, an antenna, an array antenna, and the like as hardware that constitutes the variable section 340 and the antenna section 350.

[0207] Fig. 15 shows an example configuration of a vehicle 2001. As shown in Fig. 15, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0208] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0209] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0210] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0211] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing various types of information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information obtained from external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001.

[0212] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0213] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0214] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0215] The communication module 2013 transmits, via wireless communication to an external device, a current signal from the current sensor that is input to the electronic control unit 2010. The communication module 2013 also transmits, via wireless communication to an external device, the rotation speed signals of the front and rear wheels acquired by a rotation speed sensor 2022, the air pressure signals of the front and rear wheels acquired by an air pressure sensor 2023, the vehicle speed signal acquired by a vehicle speed sensor 2024, the acceleration signal acquired by an acceleration sensor 2025, the accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, the brake pedal depression amount signal acquired by a brake pedal sensor 2026, the shift lever operation signal acquired by a shift lever sensor 2027, and the detection signals for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 2028, which are input to the electronic control unit 2010.

[0216] The communication module 2013 receives various information (traffic information, traffic signal information, inter-vehicle information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The communication module 2013 also stores the various information received from the external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.

[0217] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0218] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0219] Each aspect / embodiment described in the present disclosure may be any of the following: LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or decimal number)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G).

[0220] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0221] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0222] The information or signals described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0223] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0224] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0225] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0226] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0227] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0228] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0229] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0230] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0231] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0232] In this disclosure, terms such as "base station (BS)," "radio 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," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0233] A base station can accommodate one or more (e.g., 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 be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0234] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0235] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0236] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, or the mobile body itself. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do 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.

[0237] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0238] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0239] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0240] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0241] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0242] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0243] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0244] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0245] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0246] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0247] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0248] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0249] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0250] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0251] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0252] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0253] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0254] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0255] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0256] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0257] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0258] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0259] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0260] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0261] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0262] 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.

[0263] At least one of the configured BWPs may be active, and the terminal 20 may not expect to transmit or receive a predetermined signal / channel outside the active BWP. Note that the terms "cell," "carrier," and the like in this disclosure may be read as "BWP."

[0264] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0265] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0266] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0267] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0268] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0269] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 30 Radio repeater 310 Transmitter 320 Receiving Unit 330 Control Unit 340 Variable Section 350 Antenna section 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device 2001 Vehicle 2002 Drive unit 2003 Steering Section 2004 accelerator pedal 2005 brake pedal 2006 Shift Lever 2007 front wheel 2008 rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 RPM Sensor 2023 Air Pressure Sensor 2024 Vehicle speed sensor 2025 Acceleration Sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driving Assistance Systems Department 2031 microprocessor 2032 memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. a transmitter that transmits capability information to the base station, the capability information indicating whether or not control information and relay signals can be transmitted simultaneously in communication between the base station and the terminal; a communication unit that relays communication between the base station and the terminal; Equipped with the transmitting unit simultaneously transmits the control information and the relay signal. Radio repeater device.

2. The transmitter transmits a Physical Random Access Channel (PRACH) to the base station. The wireless relay device according to claim 1 .

3. The radio relay device further includes a receiving unit that receives SSB and CSI-RS from the base station. The wireless relay device according to claim 1 .

4. the wireless relay device uses dedicated identification information to identify control information for the wireless relay device; The wireless relay device according to claim 1 .

5. transmitting capability information to the base station, the capability information indicating whether or not control information and relay signals can be transmitted simultaneously in communication between the base station and the terminal; relaying communication between the base station and the terminal; and The control information and the relay signal are transmitted simultaneously. A communication method using a wireless relay device.

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