Wireless relay device, base station, and wireless relay method

Abstract

A wireless relay device is provided with: a communication unit that relays a downlink wireless signal; a reception unit that receives, via a downlink, information for setting the transmission power of the downlink wireless signal; and a control unit that controls the transmission power of the downlink wireless signal to be transmitted to a terminal on the basis of information for setting the transmission power of the downlink wireless signal.

Description

Technical Field

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

[0002] In NR (New Radio) (also called "5G"), which is the successor system to LTE (Long Term Evolution), technologies that meet the requirements such as large-capacity systems, high data transmission speeds, low latency, simultaneous connection of multiple terminals, low costs, and power saving are being studied (for example, non-patent document 1).

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

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

[0005] Prior art literature

[0006] Non-patent literature

[0007] Non-patent document 1: 3GPP TS 38.300 V16.7.0 (2021-09)

[0008] Non-patent document 2: NTT DoCoMo, "White Paper 5G Advanced and 6G" (2021-02, version 3.0) Internet <URL:

[0009] https: / / www.nttdocomo.co.jp / binary / pdf / corporate / technology / whitepaper_6g / DOCOMO_6G_White_PaperJP_20210203.pdf> Summary of the invention

[0010] Problems to be solved by the invention

[0011] Conventionally, since there is no prescribed method for appropriately controlling the transmission power when a wireless relay device transmits a downlink wireless signal, there is a problem that appropriate power control may not be achieved in the transmission of the downlink wireless signal.

[0012] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to realize appropriate power control in downlink wireless signal transmission performed by a wireless relay device.

[0013] Means for solving problems

[0014] According to the disclosed technology, a wireless relay device is provided, which includes: a communication unit, which relays a downlink wireless signal; a receiving unit, which receives information for setting the transmission power of the downlink wireless signal through a downlink link; and a control unit, which controls the transmission power of the downlink wireless signal sent to a terminal based on the information for setting the transmission power of the downlink wireless signal.

[0015] Effects of the Invention

[0016] According to the disclosed technology, a technology capable of realizing appropriate beam control in uplink wireless signal reception by a wireless relay device is provided. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 This is a diagram showing an example of a functional configuration of a base station according to an embodiment of the present invention.

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

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

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

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

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

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

[0025] Fig. 9This is a diagram for explaining the functions of the wireless relay device.

[0026] Fig.10 This is a diagram for explaining a TPC command.

[0027] Fig.11 This is a diagram showing an example of the hardware configuration of a base station, a terminal, or a wireless relay device according to an embodiment of the present invention.

[0028] Fig.12 It is a diagram showing an example of the structure of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0030] In the operation of the wireless communication system of the embodiment of the present invention, existing technologies are appropriately used. The existing technologies are, for example, existing LTE, but are not limited to existing LTE. In addition, unless otherwise specified, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and subsequent methods (e.g., NR) of LTE-Advanced.

[0031] In addition, in the embodiments of the present invention described below, the terms SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel), etc. used in the existing LTE are used. These are for the convenience of recording, and the same signals, functions, etc. may also be referred to by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used for NR are not necessarily clearly recorded as "NR-".

[0032] Furthermore, in the embodiments of the present invention, the duplexing method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0033] In the embodiment of the present invention, “configuring” wireless parameters and the like may be pre-configuring predetermined values, or may be configuring wireless parameters notified from the base station 10 or the terminal 20 .

[0034] Figure 1 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. Figure 1 As shown, the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20. The base station 10 and the terminal 20 may be multiple.

[0035] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined in the time domain and the frequency domain. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or resource blocks. In addition, the TTI (Transmission Time Interval) in the time domain can be a time slot or a subslot, and the TTI can be a subframe.

[0036] The base station 10 can perform carrier aggregation for bundling a plurality of cells (a plurality of CCs (component carriers)) to communicate with the terminal 20. In carrier aggregation, one primary cell (PCell) and one or more secondary cells (SCells, Secondary Cells) are used.

[0037] The base station 10 sends synchronization signals and system information to the terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. The system information is sent, for example, via NR-PBCH or PDSCH, and is also called broadcast information. Figure 1 As shown, the base station 10 sends a control signal or data to the terminal 20 via DL (Downlink), and receives a control signal or data from the terminal 20 via UL (Uplink). In addition, here, the content sent through a control channel such as PUCCH and PDCCH is called a control signal, and the content sent through a shared channel such as PUSCH and PDSCH is called data, but such a name is only an example.

[0038] The terminal 20 is a communication device having a wireless communication function, such as a smart phone, a mobile phone, a tablet computer, a wearable terminal, or an M2M (Machine-to-Machine) communication module. Figure 1 As shown, the terminal 20 receives a control signal or data from the base station 10 via DL and sends a control signal or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. In addition, the terminal 20 may also be referred to as a UE and the base station 10 may be referred to as a gNB.

[0039] The terminal 20 can perform carrier aggregation for bundling a plurality of cells (a plurality of CCs) to communicate with the base station 10. In carrier aggregation, one primary cell and one or more secondary cells are used. Alternatively, a PUCCH-SCell having a PUCCH may be used.

[0040] In the wireless communication system according to the embodiment of the present invention, as an example, the base station 10 is a wireless base station operating in accordance with 5G or 6G, and forms a cell. In addition, the cell is a relatively large cell, which is called a macro cell.

[0041] Base stations 10A to 10D are base stations operating in accordance with 5G or 6G. Base stations 10A to 10D respectively form cells A to D that are smaller in size than macro cells. Cells A to D may also be referred to as small cells or macro cells. Figure 1 As shown, cells A to D may be formed so as to be included in the macro cell.

[0042] A macro cell can generally be interpreted as a communication area with a radius of several hundred meters to several tens of kilometers covered by one base station. In addition, a small cell can also be interpreted as a general term for cells with low transmission power and covering a smaller area than a macro cell.

[0043] In addition, the base station 10 and the base stations 10A to 10D may also be expressed as gNodeB (gNB) or BS (BaseStation). In addition, the terminal 20 may also be expressed as UE or MS. In addition, the specific structure of the wireless communication system including the number and types of base stations and terminals is not limited to Figure 1 Example shown.

[0044] In addition, the wireless communication system is not necessarily limited to a wireless communication system that complies with 5G or 6G. For example, the wireless communication system may also be a next-generation wireless communication system of 6G, or a wireless communication system that complies with LTE.

[0045] As an example, wireless communication in accordance with 5G or 6G is performed between the base station 10 and the base stations 10A to 10D and the terminal 20. The base station 10 and the base stations 10A to 10D and the terminal 20 may also support massive MIMO (Massive MIMO) that generates a more directional beam by controlling wireless signals transmitted from a plurality of antenna elements, carrier aggregation (CA: carrier aggregation) that bundles a plurality of component carriers (CCs), dual connectivity (DC: dual connectivity) that simultaneously communicates between the terminal 20 and two NG-RAN nodes, and IAB (Integrated Access and Backhaul: Integrated Access and Backhaul) that integrates wireless backhaul between wireless communication nodes such as gNB and wireless access to the terminal 20, etc.

[0046] In addition, the wireless communication system can also support higher frequency bands than the following frequency range (Frequency Range, FR) specified in 3GPP version 15. For example, 410MHz-7.125GHz can be supported as FR1, and 24.25GHz-52.6GHz can be supported as FR2. Furthermore, the wireless communication system can also support frequency bands exceeding 52.6GHz and up to 114.25GHz. This frequency band can also be called a millimeter wave band.

[0047] Here, the base station 10 supporting massive MIMO can transmit beams. Massive MIMO generally refers to MIMO communication using antennas with more than 100 elements, which can perform wireless communication at a higher speed than before through the multiplexing effect of multiple streams. In addition, advanced beamforming can also be performed. The beam width can be dynamically changed according to the frequency band used or the state of the terminal 20. In addition, by using a narrow beam, an increase in the received signal power based on the beamforming gain can be achieved. Furthermore, effects such as reduction in interference and effective use of wireless resources are expected.

[0048] In addition, the wireless communication system may include a wireless relay device 30. In the embodiment of the present invention, as an example, the wireless relay device 30 may be a reflector (RIS), a metamaterial functional device, a battery-less device (Battery less device: battery-free device), a phase-controlled reflector, a passive repeater, an IRS (Intelligent Reflecting Surface), a smart repeater (Smart Repeater), a network-controlled repeater (Network Controlled Repeater), etc. As a specific example of the reflector (RIS), it may be a reflector called a metamaterial reflector, a dynamic metasurface, a metasurface lens, etc. (for example, Non-Patent Document 2).

[0049] In the embodiment of the present invention, the wireless relay device 30, for example, relays a wireless signal sent from the base station 10A. In the description of the embodiment of the present invention, "relay" may refer to at least one of "reflection", "transmission", "aggregation (concentrating radio waves at approximately one point)" and "diffraction". The terminal 20 is capable of receiving the wireless signal relayed by the wireless relay device 30. Furthermore, the wireless relay device 30 can relay both the wireless signal sent from the terminal 20 and the wireless signal sent from the base station 10.

[0050] As an example, the wireless relay device 30 can change the phase of the wireless signal relayed to the terminal 20. From this point of view, the wireless relay device 30 can also be called a phase variable reflector. In addition, in the present embodiment, the wireless relay device 30 sometimes has a function of relaying by changing the phase of the wireless signal, but is not limited to this. In addition, the wireless relay device 30 can also be called a RIS, a repeater, a relay device, a reflect array, or a transmission array.

[0051] Furthermore, in the embodiment of the present invention, the wireless relay device 30 may also be defined as having the functions shown in the following 1) to 5).

[0052] 1) It may have a receiving function of receiving a signal sent from the base station 10. The signal may be a DL signal 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), RIS dedicated signal, etc. It may also have a receiving function of receiving a signal that carries information related to the metamaterial function. In addition, it may also have a sending function of sending the signal to the terminal 20.

[0053] 2) It may have a function of transmitting a signal to the base station 10. The signal may be a PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signal, etc., which is a UL signal. It may also have a function of transmitting information related to the metamaterial function. In addition, it may also have a function of receiving the signal from the terminal 20.

[0054] 3) It may have a frame synchronization function with the base station 10. In addition, it may have a frame synchronization function with the terminal 20.

[0055] 4) It may have a reflection function of a signal sent from the base station 10 or the terminal 20. For example, the reflection function may be a function related to phase change, a function related to beam control (for example, a function related to control of TCI (Transmission Configuration Indication: Transmission Configuration Indication)-state (TCI state), QCL (Quasi Co Location: Quasi Co-location) , beam selection application, spatial filter / precoding weight selection application).

[0056] 5) It may have a power change function of a signal transmitted from the base station 10 or the terminal 20. For example, the power change function may be power amplification.

[0057] In addition, "receiving and transmitting" and "relaying" in the wireless relay device 30 such as RIS or intelligent repeater may mean that the following function A is performed but the following function B is not performed and transmission is performed.

[0058] Function A: Apply phase shifter.

[0059] Function B: Not passing through compensation circuit (eg amplification, filter).

[0060] As another example,

[0061] Function A: Apply phase shifter and compensation circuit.

[0062] Function B: without frequency conversion.

[0063] Furthermore, in the wireless relay device 30 such as RIS, the amplitude may be amplified when the phase is changed. Furthermore, "relay" in the wireless relay device 30 such as RIS may also mean directly sending the received signal without performing layer 2 or layer 3 processing, directly sending the signal received at the physical layer, or directly sending the received signal without interpreting the signal (in this case, the phase may be changed, the amplitude may be amplified, etc.).

[0064] (Device Structure)

[0065] Next, a functional configuration example of the base station 10, the terminal 20, and the wireless relay device 30 that perform the processing and operations in the embodiment of the present invention is described. The base station 10, the terminal 20, and the wireless relay device 30 include functions for performing the embodiments described later. However, the base station 10, the terminal 20, and the wireless relay device 30 may each have only one of the functions in the embodiments.

[0066] <Base station 10>

[0067] Figure 2 FIG. 1 is a diagram showing an example of a functional structure of a base station according to an embodiment of the present invention. Figure 2 As shown, the base station 10 includes a transmission unit 110 , a reception unit 120 , a setting unit 130 , and a control unit 140 . Figure 2 The functional structure shown is only an example. As long as the operation of the embodiment of the present invention can be performed, the functional division and the name of the functional unit can be arbitrary. The sending unit 110 and the receiving unit 120 can also be called a communication unit.

[0068] The transmitting unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher layer information from the received signals. In addition, the transmitting unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to the terminal 20. In addition, the transmitting unit 110 transmits the setting information described in the embodiment, etc.

[0069] The setting unit 130 stores the preset setting information and various setting information sent to the terminal 20 in the storage device, and reads it from the storage device as needed. The control unit 140 performs, for example, resource allocation and overall control of the base station 10. In addition, the functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120. In addition, the transmission unit 110 and the receiving unit 120 may be referred to as a transmitter and a receiver, respectively.

[0070] <Terminal 20>

[0071] Figure 3 1 is a diagram showing an example of a functional structure of a terminal according to an embodiment of the present invention. Figure 3 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Figure 3 The functional structure shown is only an example. As long as the operation of the embodiment of the present invention can be performed, the functional division and the name of the functional unit can be arbitrary. The sending unit 210 and the receiving unit 220 can also be called a communication unit.

[0072] The transmitting unit 210 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly and obtains a higher layer signal from the received physical layer signal. In addition, the transmitting unit 210 transmits HARQ-ACK, and the receiving unit 220 receives the setting information described in the embodiment.

[0073] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10 in the storage device, and reads it from the storage device as needed. In addition, the setting unit 230 also stores pre-set setting information. The control unit 240 performs overall control of the terminal 20, etc. In addition, the functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220. In addition, the transmitting unit 210 and the receiving unit 220 may be referred to as a transmitter and a receiver, respectively.

[0074] <Wireless Relay Device 30>

[0075] Figure 4 FIG. 1 is a diagram showing an example of a functional structure of a wireless relay device according to an embodiment of the present invention. Figure 4 As shown, the wireless relay device 30 includes a transmitting unit 310, a receiving unit 320, a control unit 330, a variable unit 340, and an antenna unit 350. As long as the actions of the embodiments of the present invention can be performed, the functional distinction and the names of the functional units can be arbitrary. The transmitting unit 310 and the receiving unit 320 can also be called a communication unit.

[0076] The antenna unit 350 includes at least one antenna connected to the variable unit 340. For example, the antenna unit 350 may be configured as an array antenna. In the embodiment of the present invention, the antenna unit 350 is sometimes particularly referred to as a relay antenna. In addition, the variable unit 340 and the antenna unit 350 may also be referred to as a relay unit.

[0077] The variable unit 340 is connected to the antenna unit 350 and can change the phase, load, amplitude, etc. For example, the variable unit 340 can be a variable phase device, a phase shifter, an amplifier, etc. For example, by changing the phase of the radio wave reaching the relay antenna from the radio wave generation source, the direction or beam of the radio wave can be changed.

[0078] The control unit 330 is a control unit that controls the variable unit 340. In the embodiment of the present invention, the control unit 330 functions as a control unit that controls the relay state when relaying without interpreting the signal of the radio wave from the base station 10 or the terminal 20. Here, the control unit 330 can change the relay state based on the control information received from the base station 10 or the terminal 20 via the communication unit, or can change the relay state based on the reception state of the radio wave from the base station 10 or the terminal 20. For example, the control unit 330 can select an appropriate receiving beam and a transmitting beam (direction) based on control information such as SSB, and control the variable unit 340. Similarly, the control unit 330 can also select an appropriate combination of receiving direction and transmitting direction based on the reception state, based on criteria such as reception quality or maximum reception power, and control the variable unit 340.

[0079] In addition, in the embodiment of the present invention, the control unit 330 can control the variable unit 340 based on information related to the propagation path between the terminal 20 or the base station 10A and the antenna unit 350 (including information estimated based on the reception state and control information. The same applies below). For example, the control unit 330 can use a well-known method such as an active repeater or RIS to change the phase of the radio wave received from the base station 10A without using transmission power, thereby relaying the radio wave to a specific direction such as the radio wave reception destination (in this case, the terminal 20). Specifically, the control unit 330 controls the variable unit 340 based on the estimated propagation path information H. PT and H RP, controlling the phase of the wireless signal so as to relay the wireless signal to the terminal 20 or the base station 10A. That is, by changing the phase of the array antenna or the like based on the same principle as beamforming, it is possible to relay radio waves in a specific direction. In addition, the wireless relay device 30 may also perform relaying in a non-powered manner by controlling (changing) only the phase of the wireless signal (radio wave) through the control unit 330 without amplifying the power of the relayed wireless signal or the like.

[0080] In addition, in the embodiment of the present invention, the control unit 330 may also obtain information according to the reception state. In addition, the receiving unit 320 may obtain control information from the base station 10A or the terminal 20. For example, the receiving unit 320 may receive various signals such as SSB transmitted from the base station 10A or the terminal 20 (including the various signals exemplified in the above functions) as control information.

[0081] In addition, the control unit 330 may estimate the propagation path information (H) between the radio wave generation source (for example, the base station 10A or the terminal 20) and the antenna unit 350 based on the reception state (for example, the change in the received power) during the control of the variable unit 340. PT and H RP ).

[0082] Specifically, the propagation path information (propagation channel information) related to each propagation path is information such as amplitude or phase, and in the embodiment of the present invention, is information estimated about the propagation path of the radio wave reaching the antenna unit 350. As an example, the control unit 330 can estimate the propagation path information of the antenna unit 350 based on the change in received power when the phase of the variable unit 340 of the array antenna unit 350 is switched to orthogonal based on the same principle as I / Q (In-phase / Quadrature: in-phase / quadrature) detection.

[0083] Figure 5 FIG. 2 is a diagram showing an operation example of a wireless relay device according to an embodiment of the present invention. Figure 5 As shown, as an example, the wireless relay device 30 is interposed between the base station 10A (or other base stations 10, etc.) and the terminal 20, and relays (reflects, transmits, collects, diffracts, etc.) wireless signals transmitted and received between the base station 10A and the terminal 20.

[0084] As a specific example, when the wireless quality is good, the base station 10A and the terminal 20 directly transmit and receive wireless signals without passing through the wireless relay device 30. On the other hand, when the wireless quality deteriorates due to the presence of an obstruction between the base station 10A and the terminal 20, the wireless relay device 30 relays the wireless signals transmitted and received between the base station 10A and the terminal 20.

[0085] Specifically, the wireless relay device 30 estimates the propagation path information H between the radio wave generation source such as the base station 10A or the terminal 20 and the relay antenna based on the change in the received power when the variable unit 340 such as the variable phase shifter is controlled. PT , H RT , and based on the estimated propagation path information, the variable unit 340 such as the variable phase shifter is controlled, thereby relaying the wireless signal to the radio wave receiving destination such as the terminal 20. In addition, the estimated propagation path information H is not limited to PT , H RT The wireless relay device 30 may also control the variable unit 340 such as a variable phase shifter based on the control information received from the base station 10A or the terminal 20, thereby relaying the wireless signal to the radio wave receiving destination such as the base station 10A or the terminal 20.

[0086] Here, the propagation path or propagation channel is each communication path of wireless communication, and here is the communication path between each transmitting and receiving antenna (such as the base station antenna and terminal antenna in the figure).

[0087] As an example, the wireless relay device 30 includes: an antenna unit 350, which has a small multi-element antenna that supports large-scale MIMO; and a variable unit 340, which has a variable phase shifter or phase shifter that changes the phase of a wireless signal (essentially an electric wave) to a specific phase. The wireless relay device 30 uses the variable unit 340 to control the phase of the electric wave relayed to the terminal 20 or the base station 10A.

[0088] Figure 6 is a diagram showing an example of communication in a high frequency band. Figure 6 As shown, when using a high frequency band of several GHz to tens of GHz or more, a blind spot is easily generated due to the strong straightness of the radio waves. When the base station 10A and the terminal 20 can see each other, even when using this high frequency band, the wireless communication between the base station 10A and the terminal 20 will not be affected. On the other hand, for example, when the view between the base station 10A and the terminal 20 is blocked by an obstruction such as a building or a tree, the wireless quality is greatly degraded. That is, when the terminal 20 moves to a blind spot blocked by an obstruction, the communication may be interrupted.

[0089] Considering the existence of applications (such as remote operation) that effectively utilize high-speed, large-capacity, and low-delay characteristics, it is important to eliminate blind spots and ensure the connection between base stations and terminals without interrupting communications within the wireless communication system.

[0090] Therefore, a technology has been developed that can relay radio waves between the base station 10A and the terminal 20, such as radio wave propagation control devices such as RIS or intelligent repeaters. In this way, by controlling the propagation characteristics of base station signals, communication characteristics can be improved, and without requiring a signal source, coverage can be expanded, and installation and operation costs based on additional base stations can be reduced.

[0091] In the past, there are passive and active types of radio wave propagation control devices. The passive type has the advantage of not requiring control information, but cannot follow moving objects or environmental changes. On the other hand, the active type has the disadvantage of requiring control information and increasing overhead, but it can change the load (phase) state of the control antenna to variably control the propagation characteristics of the radio wave, and can also follow moving objects and environmental changes.

[0092] There are two types of active wave propagation control devices and control methods, namely feedback (FB) specification and propagation path information specification. In the FB specification, the variable type wave propagation control device is fed back by the terminal 20 etc. to randomly change the communication state of the load (phase) state, and searches for the best condition. On the other hand, in the propagation path information specification, the load state can be determined based on the propagation path information between the base station and the wave propagation control device, and the best wave propagation control can be performed. In the embodiment of the present invention, either type can be applied.

[0093] In addition, as relay methods, there are types such as reflection, transmission, diffraction, and aggregation, but in this embodiment, as an example, the following describes the structural examples of the reflection type and the transmission type (for the diffraction type and the aggregation type, refer to non-patent document 2, etc.).

[0094] Figure 7 FIG. 1 is a diagram showing an example of a reflective type wireless relay device according to an embodiment of the present invention. Figure 7 An example of the system configuration of the reflection-type wireless relay device 30 will be described. Figure 7 1 is a diagram showing the relationship between the transmission antenna Tx of the base station 10A, etc., the relay antenna Sx of the transmission type wireless relay device 30, and the reception antenna Rx of the terminal 20, etc. Figure 7 As shown, in an embodiment of the present invention, taking MIMO as an example, there are multiple propagation paths between Tx-Sx and multiple propagation paths between Sx-Rx, and the wireless relay device 30 controls the variable part 340 having a variable phase shifter of the relay antenna Sx to relay radio waves.

[0095] like Figure 7 As shown in FIG. 1 , in the case of the reflection type, the array-shaped relay antennas are arranged facing the same direction. Thus, the propagation path of the relay antenna can be estimated based on the reception state observed when the multiple phase conditions of the relay antenna are changed.

[0096] Figure 8 FIG. 1 is a diagram showing an example of a transmission-type wireless relay device according to an embodiment of the present invention. Figure 8 An example of the system configuration of the transmission-type wireless relay device 30 will be described. Figure 81 is a diagram showing the relationship between the transmission antenna Tx of the base station 10A, etc., the relay antenna Sx of the transmission type wireless relay device 30, and the reception antenna Rx of the terminal 20, etc. Figure 8 As shown, in an embodiment of the present invention, taking MIMO as an example, there are multiple propagation paths between Tx-Sx and multiple propagation paths between Sx-Rx. As shown in the figure, the wireless relay device 30 relays the radio waves arriving from one side to the other side via a variable portion 340 such as a variable phase shifter of the relay antenna Sx. In this way, in the case of the transmission type, the reference antenna on the left side of the figure and the relay antenna on the right side of the figure are respectively arranged in pairs facing opposite directions so that the radio waves arriving from one side can be relayed to the other side. It can also be configured so that whether it is a transmission type or a reflection type, the power reaching the relay antenna can be detected by a power detector, etc., and the receiving state can be measured. In addition, the propagation path of the relay antenna can be estimated based on the received signal observed when the multiple phase conditions of the relay antenna are changed.

[0097] For example, in future networks such as 6G, higher quality than 5G is required. For example, ultra-high speed of T level (tera bps level), high reliability and low latency of optical communication level, etc. are required. In order to achieve this quality, it is envisaged to use very high frequencies, such as terahertz waves. For example, in the case of using very high frequencies such as terahertz waves, the advantages are envisaged to be the high speed due to the use of ultra-wideband and the low latency due to the shortening of the code element length, but on the other hand, the disadvantages are also envisaged, such as the narrow coverage due to the large attenuation rate and the reduction in reliability due to the high straightness. For each location where 6G communication is required, it is required to study how to ensure redundancy, that is, how to increase the transmission points of communication.

[0098] As described above, the wireless relay device 30 reflects or transmits the beam transmitted from the base station 10 or the terminal 20 in a predetermined direction and delivers it to the terminal 20 or the base station 10. The wireless relay device 30 may be, for example, a passive RIS, an active RIS, or the like. The passive RIS is a device that does not change the control of the reflection angle or the beam width, etc. according to the position of the mobile station, and does not require control information, but it is difficult to perform precise beam control. The active RIS is a device that changes the control of the reflection angle and the beam width, etc. according to the position of the mobile station, and can perform precise beam control, but because control information is required, the overhead increases. The wireless relay device 30 can increase the transmission points of communication.

[0099] The wireless relay device 30 may be any device as long as it has a predetermined function. The predetermined function may be, for example, at least one of the following functions 1) and 2).

[0100] 1) Terminal functions

[0101] The wireless relay device 30 may have a receiving function of signals (e.g., DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, RIS dedicated signals) transmitted from the base station 10. Through this receiving function, the wireless relay device 30 may receive information related to the following 2) metamaterial function.

[0102] In addition, the wireless relay device 30 may also have a transmission function of sending signals to the base station 10 (for example, UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signals). Through this transmission function, the wireless relay device 30 may also send information related to the following 2) metamaterial function. In addition, the wireless relay device 30 may also have a frame synchronization function with the base station 10.

[0103] 2) Metamaterial Functions

[0104] The wireless relay device 30 may have a function of reflecting (e.g., changing the phase) a signal transmitted from the base station 10 or the terminal 20. The wireless relay device 30 may reflect the signal by changing the phase of each of the plurality of reflection elements of the wireless relay device 30, or may reflect the signal by performing a common phase change on the plurality of reflection elements.

[0105] In addition, the wireless relay device 30 may have functions related to beam control (for example, functions related to TCI-state (TCI state), QCL control, selection and application of beams, selection and application of spatial filters / precoding weights). The wireless relay device 30 may have a power change function (for example, power amplification) of a signal sent from the base station 10 or the terminal 20. The wireless relay device 30 may perform different power changes for each reflective element of the wireless relay device 30, or may perform common power changes on multiple reflective elements.

[0106] "Receiving and transmitting" in the wireless relay device 30 may also refer to reflected radio waves / signals. The terms "base station" and "terminal" are used below, but are not limited thereto and may be replaced by communication devices.

[0107] In addition, the wireless relay device 30 of this embodiment may also be assumed as follows.

[0108] The BW operator installs the wireless relay device 30 .

[0109] The wireless relay device 30 is fixed and does not move.

[0110] The wireless relay device 30 relays a signal transmitted from only one base station.

[0111] The wireless relay device 30 can transmit and receive control signals.

[0112] The wireless relay device 30 operates in half-duplex.

[0113] The wireless relay device 30 operates in a single RIS environment.

[0114] (Past Problems)

[0115] Research on network-controlled wireless relay devices was conducted in NR Release 18. Unlike conventional amplifier-and-forward repeaters, network-controlled wireless relay devices can control beam / timing / DL-UL / ON-OFF / power.

[0116] Fig. 9 This is a diagram for explaining the functions of the wireless relay device. The transmission types of the wireless relay device 30 can be classified into the following three types.

[0117] 1) Uplink transmission (terminal function for base station 10)

[0118] 2) Uplink transmission (relay function toward base station 10)

[0119] 3) Downlink transmission (relay function for terminal 20)

[0120] In the previous wireless relay device (not network control), "2. Uplink transmission (relay function for base station 10)" and "3. Downlink transmission (relay function for terminal 20)" can be performed (there is no function of "1. Uplink transmission (terminal function for base station 10)").

[0121] In the case of a wireless relay device controlled by the network, "3. Downlink transmission (relay function for the terminal 20)" can be considered for power saving and interference management.

[0122] (Overview of this embodiment)

[0123] In this embodiment, a power control method is described in "3. Downlink transmission (relay function for the terminal 20)" of the wireless relay device 30. Hereinafter, as specific embodiments, Embodiments 1 to 7 are described.

[0124] (Example 1)

[0125] In this embodiment, an example of setting the downlink transmission power of the wireless relay device 30 will be described.

[0126] The wireless relay device 30 may assume that the downlink transmission power is set by the network (eg, the base station 10 ).

[0127] <option 0>

[0128] The content of the power control may depend on the implementation of the wireless relay device 30 .

[0129] The wireless relay device 30 can assume that the downlink transmission power of the “relay function” is determined based on, for example, the data rate, frequency / time resources / selected beam / configured signal / channel / received power transmitted by the terminal 20.

[0130] <Option 1>

[0131] The wireless relay device 30 can assume that the maximum output (MOP) of the “downlink transmission relay function” is specified.

[0132] The wireless relay device 30 may report the MOP (or power headroom) of the “downlink transmission relay function” to the base station 10. The base station 10 may set the authorized MOP of the “downlink transmission relay function”.

[0133] The MOP of the “relay function for downlink transmission” may be equal to the MOP of the “terminal function” or the MOP of the “relay function for uplink transmission”.

[0134] The wireless relay device 30 may determine the transmission power not to exceed the authorized MOP.

[0135] <Option 2>

[0136] The wireless relay device 30 may assume that the transmission power is set by the base station 10. The base station 10 may set the downlink transmission power for the relay function (it may be set semi-statically). The wireless relay device 30 may always use the set downlink transmission power.

[0137] The wireless relay device 30 may assume that different downlink transmission powers are set for each downlink transmission antenna beam of the wireless relay device 30 or for each DL signal / channel (for example, the power of a cell-specific channel and the power of a terminal-specific channel are different).

[0138] When the downlink transmission power is not set, the wireless relay device 30 may assume that the downlink transmission power depends on the wireless relay device 30 or a default value (for example, MOP) is specified.

[0139] In addition, the MOP / downlink transmission power may be provided with reference to the SSB or CSI-RS transmission power (background: the SSB / CSI-RS transmission power is provided to the terminal 20 as in Embodiment 5).

[0140] For example, the wireless relay device 30 may be preliminarily defined / instructed that the MOP / downlink transmission power is equal to the SSB transmission power or the transmission power of a specific CSI-RS.

[0141] Furthermore, the wireless relay device 30 may be preliminarily defined / instructed that the MOP / downlink transmission power is a positive / negative offset of the SSB transmission power or the transmission power of a specific CSI-RS.

[0142] (Example 2)

[0143] In this embodiment, a method for controlling downlink transmission power performed by the wireless relay device 30 controlled by the network will be described.

[0144] Fig.10 This is a diagram for explaining Example 2 of the present embodiment. The base station 10 can control the downlink transmission power of the relay function (can be set dynamically / semi-statically).

[0145] The wireless relay device 30 can determine a different downlink transmission power for each downlink transmission antenna beam of the wireless relay device 30 (for example, only the downlink transmission power of antenna beam A is controlled), or determine a different downlink transmission power for each DL signal / channel (for example, different powers between the cell-specific channel and the UE-specific channel (only the downlink transmission power of the terminal-specific channel is controlled)).

[0146] <Option 1>

[0147] The wireless relay device 30 may use an uplink / downlink indication.

[0148] Fig.10 This is a diagram for explaining a TPC command. The base station 10 may send an uplink / downlink power indication such as a TPC command in the uplink transmission power of the terminal. The TPC of the downlink transmission power may be sent via DCI / MAC-CE / RRC. In addition, the mapping of the TPC command field of the downlink transmission power may also be specified. For example, the wireless relay device 30 may transmit a signal at maximum power, and power reduction is one of the motivations for downlink transmission power control.

[0149] In addition, the wireless relay device 30 may also use the TPC command of the uplink transmission power of the terminal 20. If the relationship between the path loss of UL and DL is taken into account, the wireless relay device 30 can apply the power offset to DL when the UL power is controlled. In particular, the "downlink" indication of the downlink transmission power can be applied. For example, DCI formats 2_2, 2_3 and TPC in the scheduling of PUSCH can refer to the downlink transmission power.

[0150] In addition, the wireless relay device 30 may assume that multiple loops of TPC for downlink transmission are specified, similarly to TCP for uplink transmission of the terminal. For example, different power loops may be used for each beam / signal / channel.

[0151] In the case of a TPC command indicating downlink transmission power, a corresponding power loop may also be indicated, and the TPC command is applied to the corresponding power loop. The maximum number of loops can be set to X (2, etc.).

[0152] <Option 3>

[0153] The wireless relay device 30 may use a relative power indication. The base station 10 may send a relative power indication, for example, xdB uplink or ydB downlink.

[0154] The wireless relay device 30 may assume that the indication is sent via DCI / MAC-CE / RRC. The indication may be a specific time resource (e.g., x symbol, y subslot, z slot), and the indicated power may be used from the time the power is indicated until the wireless relay device 30 receives an additional indication. In addition, the wireless relay device 30 may receive an additional indication for activating / deactivating the indicated power.

[0155] The wireless relay device 30 can be applied after x symbols / subslots / time slots from the indicated reception timing. The indicated power range can also be specified. For example, it can be -5 to 5dB (1dB step). There is a range of 2 to 4dB in the indication, and the wireless relay device 30 can determine the transmission power based on the indication.

[0156] <Option 4>

[0157] The wireless relay device 30 may use an absolute power indication. The base station 10 may send an absolute power indication. For example, it may be xdBm. The wireless relay device 30 may assume that the indication is sent via DCI / MAC-CE / RRC.

[0158] The instruction may be a specific time resource (e.g., x symbol, y subslot, z slot), and the instructed power may be used from the time the power is instructed until the wireless relay device 30 receives an additional instruction. In addition, the wireless relay device 30 may receive an additional instruction for activating / deactivating the instructed power.

[0159] The wireless relay device 30 can be applied after x symbols / subslots / time slots from the indicated reception timing. The indicated power range can also be specified. For example, it can be 0dBm to 24dBm (1dBm step). There is a range of 20 to 22dBm in the indication, and the wireless relay device 30 can determine the transmission power based on the indication.

[0160] (Example 3)

[0161] In this embodiment, an example in which the wireless relay device 30 reports the downlink transmission power will be described.

[0162] The wireless relay device 30 may report the downlink transmission power. The base station 10 needs to know the downlink transmission power at the control start time of the wireless relay device 30 that is being controlled. Therefore, the wireless relay device 30 may report the latest downlink transmission power. Absolute power or relative power (power margin, etc.) is used in the report. The wireless relay device 30 may report periodically, or the wireless relay device 30 may report at the timing of changing the power supply or at the timing of making a request to the base station 10.

[0163] As an example of a reporting method, consider the following method.

[0164] UCI: Use CSI feedback or new feedback

[0165] MAC-CE: Use PHR-MAC-CE or new MAC-CE

[0166] RRC (higher layer signaling): For example, using measurement reports or new reports

[0167] In addition, the base station 10 sometimes identifies the power based on the measurement report of the terminal. That is, different downlink transmission powers are sometimes reported for different time / frequency resources / beams / signals / channels.

[0168] (Example 4)

[0169] In this embodiment, an example in which the wireless relay device 30 determines the downlink transmission power will be described.

[0170] The wireless relay device 30 can define the downlink transmission power based on the following information (one or more): The wireless relay device 30 can specify an equation that defines the downlink transmission power, and the parameters of the equation can be as follows.

[0171] Default downlink transmit power (e.g., transmit power set or specified by OAM)

[0172] In the case of downlink transmission power, it is the maximum output power of the wireless relay device 30, or in the case of the wireless relay device 30, it is the MOP

[0173] · Set downlink transmission power (same as in Example 1)

[0174] Controlled downlink transmission power (such as embodiment 2)

[0175] Uplink transmit power information

[0176] · The parameters set (e.g., frequency resources, SCS)

[0177] Signal / Channel

[0178] Downlink transmit beam

[0179] (Example 5)

[0180] In the present embodiment, an example in which the transmission information of the wireless relay device 30 is notified to the terminal 20 will be described.

[0181] The transmission information of the wireless relay device 30 may be notified to the terminal 20. For example, the downlink SSB transmission power may be indicated to the terminal 20 for path loss calculation (eg, using "ss-PBCH-BlockPower" in the information element "ServingCellConfigCommonSIB" included in the information element "ServingCellConfigCommon").

[0182] When the wireless relay device 30 is used to amplify the DL and UL signals, it means that the actual DL SSB transmission power + amplifier gain is higher than the specified DL SSB transmission power. In order to correct the power difference between the actual DL SSB transmission power + amplifier gain and the indicated DL SSB transmission power, the terminal 20 can perform the following optional actions.

[0183] <option 0>

[0184] The gain of the amplifier is considered as part of the path loss. In particular, the gain of UL and DL is the same.

[0185] <Option 0-1>

[0186] In case the amplifier gains of UL and DL are different, the difference is shown at terminal 20.

[0187] <Option 1>

[0188] Use beam-specific “ss-PBCH-BlockPower” Since the base station 10 may recognize that the SSB beam is used for the wireless relay device 30, a different “ss-PBCH-BlockPower” may be set.

[0189] <Option 2>

[0190] The offset value relative to "ss-PBCH-BlockPower" is indicated to the terminal 20. The offset value may be equal to the gain of the amplifier. The offset value may be dynamically changed by the power control of the uplink transmission and / or the downlink transmission of the wireless relay device 30.

[0191] In order to give instructions, the base station 10 needs information on the downlink transmission power of the wireless relay device 30. The wireless relay device 30 may report the amplifier gain, that is, the downlink transmission power (along with the DL reception power in the terminal 20, if necessary).

[0192] Furthermore, the downlink transmission power may be controlled by the base station 10, and the base station 10 may use the information.

[0193] The above-mentioned SSB function can be applied to the CSI-RS transmission power shown by the terminal 20. Through the implementation of the base station 10, the SSB / CSI-RS transmission power shown by the terminal 20 can represent the actual downlink SSB transmission power+amplifier gain.

[0194] (Example 6)

[0195] In the present embodiment, an example of the transmitter characteristics for specifying the downlink transmission power of the wireless relay device 30 will be described.

[0196] The transmitter characteristics of the downlink transmission power of the wireless relay device 30 are specified. Since the transmitter characteristics of the uplink transmission of the terminal 20 are specified, the following parameters are specified for the downlink transmission power of the wireless relay device 30.

[0197] Downlink transmit power: e.g. 24dBm

[0198] Downlink transmission power tolerance: e.g. +2 / -3dB

[0199] Maximum power reduction: For example, 3 dB (under certain conditions (high modulation order, wide bandwidth, etc.), the wireless relay device 30 can reduce the downlink transmission power)

[0200] Additional Maximum Output Power Reduction (A-MPR) (Signals can be transmitted by the base station 10) (A-MPR can be introduced to reduce interference with other systems using adjacent frequency bands)

[0201] Output power dynamics: e.g. minimum output power

[0202] Transmitted signal quality: for example, frequency error

[0203] Output RF spectrum emissions: e.g. out-of-band emissions

[0204] Transition period value: for example, 2, 4, 7 μsec (in the case of RB frequency hopping, the switching timing interval needs to be smaller than the period value)

[0205] ·Permitted period for application power indication

[0206] When receiving the downlink power instruction, the wireless relay device 30 needs to apply the instruction within a period.

[0207] (Example 7)

[0208] In this embodiment, an example of defining the capability information of the wireless relay device 30 will be described.

[0209] The wireless relay device 30 may report capability information indicating non-simultaneous operation, for example, as follows.

[0210] · Function of side control information for downlink transmission power control

[0211] · Maximum output power of the relay / relay function for downlink transmission power

[0212] The wireless relay device 30 can report the function of the supported frequency band as follows.

[0213] · Single function for all frequency bands (relay function)

[0214] · Functions for each frequency band

[0215] Function for each frequency range (e.g., FR1 / FR2)

[0216] The wireless relay device 30 may report the supported duplex system function as follows.

[0217] Single function for all duplex modes (relay function)

[0218] Functionality for each duplex mode (e.g., TDD / FDD)

[0219] According to the present embodiment, the capability information of the wireless relay device 30 can be appropriately reported.

[0220] The wireless relay device and the base station of this embodiment can be configured as the wireless relay device and the base station shown in the following items. In addition, the following wireless relay method can also be implemented.

[0221] <Structure Related to This Embodiment>

[0222] (Item 1)

[0223] A wireless relay device, comprising:

[0224] A communication unit, which relays downlink wireless signals;

[0225] a receiving unit configured to receive information for setting a transmission power of the downlink wireless signal via a downlink; and

[0226] A control unit controls the transmission power of the downlink wireless signal transmitted to the terminal based on the information for setting the transmission power of the downlink wireless signal.

[0227] (Item 2)

[0228] The wireless relay device according to item 1, wherein:

[0229] The wireless relay device further includes a transmission unit configured to transmit information indicating transmission power of the downlink wireless signal transmitted from a base station to the base station.

[0230] (Item 3)

[0231] The wireless relay device according to item 2, wherein:

[0232] The transmitting unit transmits information indicating the transmission power of the downlink wireless signal to the terminal.

[0233] (Item 4)

[0234] A base station, comprising:

[0235] A communication unit that sends a downlink wireless signal to the wireless relay device;

[0236] a transmitting unit configured to transmit information for setting a transmission power of the downlink wireless signal to the wireless relay device; and

[0237] The control unit assumes that the transmission power of the downlink wireless signal transmitted to the terminal is controlled based on the information for setting the transmission power of the downlink wireless signal.

[0238] (Item 5)

[0239] A wireless relay method is performed by a wireless relay device and comprises the following steps:

[0240] Relay downlink wireless signals;

[0241] receiving information for setting the transmission power of the downlink wireless signal via a downlink; and

[0242] Based on the information for setting the transmission power of the downlink wireless signal, the transmission power of the downlink wireless signal transmitted to the terminal is controlled.

[0243] Any of the above structures can realize appropriate power control in the downlink wireless signal transmission performed by the wireless relay device. According to item 1, it is possible to perform terminal functions in the resources facing the terminal and relay downlink wireless signals to the terminal in the resources facing the wireless relay device. According to item 2, it is possible to send information indicating the transmission power of the downlink wireless signal sent from the base station to the base station. According to item 3, it is possible to send information indicating the transmission power of the downlink wireless signal to the terminal.

[0244] (Hardware Structure)

[0245] The block diagram used in the description of the above embodiment ( Figure 2 , Figure 3 as well as Figure 4 ) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, using wires, wirelessly, etc.) and implemented using these multiple devices. The functional blocks can also be implemented by combining software in the above-mentioned one device or the above-mentioned multiple devices.

[0246] Functions include judging, determining, judging, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that performs a sending function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

[0247] For example, the base station 10 , the terminal 20 , the wireless relay device 30 and the like in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.111 is a diagram showing an example of a hardware configuration of a base station 10, a terminal 20, and a wireless relay device 30 according to an embodiment of the present disclosure. The base station 10, the terminal 20, and the wireless relay device 30 may be configured as a computer device that physically includes a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0248] In the following description, the word "device" may be replaced by "circuit", "device", "unit", etc. The hardware configuration of the base station 10 and the terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0249] The functions of the base station 10, the terminal 20 and the wireless relay device 30 are implemented by the following method: predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0250] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, the control unit 140, the control unit 240, etc. may also be implemented by the processor 1001.

[0251] In addition, the processor 1001 reads a program (program code), a software module, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and performs various processes accordingly. As a program, a program that causes the computer to execute at least a part of the actions described in the above embodiments is used. For example, Figure 2 The control unit 140 of the base station 10 shown may also be implemented by a control program stored in the storage device 1002 and executed in the processor 1001. For example, Figure 3 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. Although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented by one or more chips. In addition, the program can also be sent from the network via a telecommunication line.

[0252] The storage device 1002 is a computer-readable recording medium, and may be composed of at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing the communication method involved in one embodiment of the present disclosure.

[0253] The auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (CompactDisc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (e.g., a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, and other appropriate media including at least one of the storage device 1002 and the auxiliary storage device 1003.

[0254] The communication device 1004 is hardware (transceiver device) for communicating between computers via at least one of a wired network and a wireless network, and may also be referred to as a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may also be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to implement at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, a transceiver antenna, an amplifier, a transceiver, a transmission path interface, etc. may also be implemented by the communication device 1004. The transceiver may also be implemented by physically or logically separating the transmitter and the receiver.

[0255] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0256] In addition, the processor 1001 and the storage device 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or different buses may be used between the devices.

[0257] In addition, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and a part or all of each functional block may be implemented by the hardware. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0258] Furthermore, the wireless relay device 30 may include a variable phase machine, a phase shifter, an amplifier, an antenna, an array antenna, etc. as hardware constituting the variable unit 340 and the antenna unit 350 as necessary.

[0259] Fig.12 FIG. 2 shows a structural example of a vehicle 2001. Fig.12 As shown, the vehicle 2001 includes a driving unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each form / embodiment described in the present disclosure may also be applied to a communication device mounted on the vehicle 2001, for example, may also be applied to the communication module 2013.

[0260] The driving unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also referred to as a steering wheel), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by a user.

[0261] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2029 provided in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be referred to as an ECU (Electronic Control Unit).

[0262] As signals from various sensors 2021~2029, there are current signals from the current sensor 2021 that monitors the current of the motor, speed signals of the front wheels and rear wheels obtained by the speed sensor 2022, air pressure signals of the front wheels and rear wheels obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression amount signals obtained by the accelerator pedal sensor 2029, brake pedal depression amount signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, detection signals for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028, and the like.

[0263] The information service unit 2012 is composed of various devices such as a car navigation system, an audio system, a speaker, a television, and a radio for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 provides various multimedia information and multimedia services to passengers of the vehicle 2001 using information obtained from external devices via the communication module 2013 and the like.

[0264] The information service unit 2012 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0265] The driving assistance system unit 2030 is composed of various devices for preventing accidents or reducing the driver's driving load, such as millimeter wave radar, LiDAR (Light Detection and Ranging), camera, positioning device (such as GNSS, etc.), map information (such as high-definition (HD) map, autonomous driving vehicle (AV) map, etc.), gyroscope system (such as IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, AI processor, and one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 sends and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0266] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data with the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheel 2007, the rear wheel 2008, the axle 2009, the microprocessor 2031 in the electronic control unit 2010, the memory (ROM, RAM) 2032, and the sensors 2021 to 2029 via the communication port 2033.

[0267] The communication module 2013 can be controlled by the microprocessor 2031 of the electronic control unit 2010, and is a communication device that can communicate with an external device. For example, various information can be sent and received with the external device via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. The external device can also be, for example, a base station, a mobile station, etc.

[0268] The communication module 2013 may transmit at least one of the signals from the various sensors 2021 to 2029 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021 to 2029, the information service unit 2012, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above input.

[0269] The communication module 2013 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) sent from an external device, and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be referred to as an output unit that outputs information (for example, outputs information to a display, a speaker, etc. based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)).

[0270] In addition, the communication module 2013 stores various information received from the external device in the memory 2032 that can be used by the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheel 2007, the rear wheel 2008, the axle 2009, the sensors 2021 to 2029, etc., which are provided in the vehicle 2001, based on the information stored in the memory 2032.

[0271] (Supplementary Implementation Methods)

[0272] The above describes the embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various variations, modifications, alternatives, replacements, etc. In order to promote the understanding of the invention, specific numerical examples are used for description, but unless otherwise specified, these numerical values ​​are only examples, and any appropriate value can be used. The item distinction in the above description is not essential to the present invention. You can use the items recorded in more than two items in combination as needed, or you can apply the items recorded in a certain item to the items recorded in another item (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of the physical components. The actions of multiple functional units can be performed by one physical component, or the actions of one functional unit can be performed by multiple physical components. Regarding the processing steps described in the embodiment, the order of processing can be swapped if there is no contradiction. In order to facilitate the description of the processing, the base station 10 and the terminal 20 are described using a functional block diagram, but such a device can also be implemented by hardware, software, or a combination thereof. The software that operates according to the implementation mode of the present invention through the processor of the base station 10 and the software that operates according to the implementation mode of the present invention through the processor of the terminal 20 can also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server and any other appropriate storage medium.

[0273] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-level signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. In addition, RRC signaling may be referred to as an RRC message, for example, it may also be an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0274] Each form / embodiment described in the present disclosure may also be applied to a mobile communication system using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), 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 At least one of 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems that are expanded, modified, created, and specified based on these systems. In addition, a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A and 5G, etc.) may also be applied.

[0275] The processing steps, timing, and flow of each form / implementation described in this specification may be reversed in order if there is no contradiction. For example, the method described in this disclosure uses the order of examples to indicate the elements of various steps, but is not limited to the specific order indicated.

[0276] In this specification, specific actions performed by the base station 10 are sometimes also performed by its upper node according to the situation. In a network composed of one or more network nodes having the base station 10, various actions performed for communicating with the terminal 20 can be performed by at least one of the base station 10 and other network nodes other than the base station 10 (for example, MME or S-GW, etc., but not limited to these). In the above, the case where there is one other network node other than the base station 10 is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0277] The information or signals described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), and can also be input or output via a plurality of network nodes.

[0278] The input or output information can be stored in a specific location (e.g., a memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0279] The determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0280] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0281] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a web page, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0282] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0283] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0284] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0285] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, a wireless resource may be indicated by an index.

[0286] The names used for the above parameters are non-restrictive in any respect. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly disclosed in the present disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by all appropriate names, and therefore the various names assigned to these various channels and information elements are non-restrictive in any respect.

[0287] In the present disclosure, the terms "base station (BS)," "wireless base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier" and the like are used interchangeably. Sometimes, the base station is also referred to as macro cell, small cell, femto cell, pico cell and the like.

[0288] A base station can accommodate one or more (for example, 3) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0289] In the present disclosure, the base station sending information to the terminal may be replaced by the base station instructing the terminal to perform control / action based on the information.

[0290] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0291] For mobile stations, those skilled in the art sometimes also use the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

[0292] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to an object that can move, and the moving speed is arbitrary. In addition, of course, it also includes the situation where the mobile body stops. The mobile body includes, for example, vehicles, transport vehicles, cars, motorcycles, bicycles, networked cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, two-wheel trailers (rear car), rickshaws, ships (ships and other watercraft: ships and other ships), airplanes, rockets, artificial satellites, Drone (registered trademark), multi-rotor helicopters, quadcopters, balloons and objects mounted on them, and is not limited to this. In addition, the mobile body may also be a mobile body that drives autonomously based on an operation instruction. It can be a means of transportation (such as a car, an airplane, etc.), a mobile body that moves in an unmanned manner (such as a drone, an automatic driving car, etc.), or a robot (man-powered or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0293] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple terminals 20 (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.) may also apply various forms / implementations of the present disclosure. In this case, it may also be configured that the terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0294] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may have the functions of the user terminal.

[0295] The terms "determining" and "determining" used in this disclosure sometimes include a variety of actions. "Determining" and "determining" may include, for example, considering matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) as matters that have been "determined" or "determined", etc. In addition, "determining" and "determining" may include matters that have been received (for example, receiving information), transmitted (for example, transmitting information), input, output, accessed (for example, accessed data in memory) as matters that have been "determined" or "determined", etc. In addition, "determining" and "determining" may include matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. as matters that have been "determined" or "determined". That is, "judgment" and "decision" may include certain actions that are considered to be "judged" or "decided". In addition, "judgment (decision)" may also be replaced by "assuming", "expecting", "considering", etc.

[0296] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include the situation where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used to replace "connection". In the context of the present disclosure, two elements may be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible) region may be used to "connect" or "couple" to each other.

[0297] The reference signal may be referred to as RS (Reference Signal) for short, or may be referred to as a pilot signal (Pilot) according to the applied standard.

[0298] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise explicitly stated. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0299] Any reference to an element using the designations "first", "second", etc. used in this disclosure does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, a reference to a first element and a second element does not mean that only two elements can be taken or that the first element must precede the second element in any form.

[0300] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section”, “circuit”, “device” or the like.

[0301] When the terms "include", "including" and their variations are used in the present disclosure, these terms are intended to be inclusive, just like the term "comprising". Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0302] A radio frame may be composed of one or more frames in the time domain. In the time domain, one or more frames may be referred to as a subframe. A subframe may also be composed of one or more time slots in the time domain. A subframe may be a fixed time length (e.g., 1 ms) that is independent of a numerology.

[0303] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may, for example, represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the time domain, and the like.

[0304] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0305] A time slot may contain multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in units of time greater than a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type B.

[0306] A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent time units for transmitting signals. A radio frame, a subframe, a time slot, a mini-time slot, and a symbol may be referred to by other corresponding names.

[0307] For example, one subframe may be referred to as a transmission time interval (TTI), multiple consecutive subframes may be referred to as a TTI, and one time slot or one mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing a TTI may not be referred to as a subframe, but as a time slot, a mini time slot, or the like.

[0308] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each terminal 20) to each terminal 20 in units of TTI. In addition, the definition of TTI is not limited to this.

[0309] TTI can be a transmission time unit of data packets (transport blocks), code blocks, code words, etc. after channel coding, or a processing unit such as scheduling and link adaptation. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which the transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0310] In addition, when one time slot or one mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can be the minimum time unit for scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit for scheduling can be controlled.

[0311] A TTI with a time length of 1 ms is also called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-time slot, a sub-time slot, a time slot, etc.

[0312] In addition, for a long TTI (for example, a normal TTI, a subframe, etc.), it can be replaced with a TTI having a time length exceeding 1ms, and for a short TTI (for example, a shortened TTI, etc.), it can be replaced with a TTI having a TTI length smaller than the long TTI (longTTI) and greater than 1ms.

[0313] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may include one or more consecutive subcarriers. The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0314] In addition, the time domain of an RB may include one or more symbols, and may be the length of one slot, one mini slot, one subframe, or one TTI. One TTI, one subframe, etc. may be composed of one or more resource blocks, respectively.

[0315] In addition, one or more RBs may also be referred to as a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, etc.

[0316] In addition, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0317] A bandwidth part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, the common RBs may be identified by the index of the RBs relative to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0318] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for the terminal 20 within one carrier.

[0319] At least one of the set BWPs may be active, and it is not assumed that the terminal 20 transmits and receives a predetermined signal / channel outside the activated BWP. In addition, "cell", "carrier" and the like in the present disclosure may be replaced with "BWP".

[0320] The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length may be changed in various ways.

[0321] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure also includes a case where the noun following the article is in a plural form.

[0322] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". In addition, the term may mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0323] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched depending on the execution. In addition, notification of predetermined information (e.g., notification of "yes X") is not limited to being performed explicitly, but may also be performed implicitly (e.g., not notifying the predetermined information).

[0324] The present disclosure is described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0325] Description of symbols

[0326] 10: Base Station

[0327] 110: Sending Department

[0328] 120: Receiving Department

[0329] 130: Setting department

[0330] 140: Control Department

[0331] 20: Terminal

[0332] 210: Sending Department

[0333] 220: Receiving Department

[0334] 230: Setting department

[0335] 240: Control Department

[0336] 1001: Processor

[0337] 1002: Storage device

[0338] 1003: Auxiliary storage device

[0339] 1004: Communication device

[0340] 1005: Input device

[0341] 1006: Output device

[0342] 2001: Vehicles

[0343] 2002: Drive Department

[0344] 2003: Steering

[0345] 2004: Accelerator pedal

[0346] 2005: Brake pedal

[0347] 2006: Gear Lever

[0348] 2007: Front wheel

[0349] 2008: Rear wheel

[0350] 2009: Axles

[0351] 2010: Electronic Control Department

[0352] 2012: Information Services Department

[0353] 2013: Communication Module

[0354] 2021: Current Sensors

[0355] 2022: Speed ​​Sensor

[0356] 2023: Air pressure sensor

[0357] 2024: Vehicle speed sensor

[0358] 2025: Accelerometers

[0359] 2026: Brake pedal sensor

[0360] 2027: Gearshift sensor

[0361] 2028: Object detection sensors

[0362] 2029: Accelerator pedal sensor

[0363] 2030: Driving Assistance Systems Division

[0364] 2031: Microprocessors

[0365] 2032: Memory (ROM, RAM)

[0366] 2033: Communication port (IO port)

Claims

1. A wireless relay device, comprising: A communication unit, which relays downlink wireless signals; a receiving unit configured to receive information for setting a transmission power of the downlink wireless signal via a downlink; and A control unit controls the transmission power of the downlink wireless signal transmitted to the terminal based on the information for setting the transmission power of the downlink wireless signal.

2. The wireless relay device according to claim 1, wherein: The wireless relay device further includes a transmission unit configured to transmit information indicating transmission power of the downlink wireless signal transmitted from a base station to the base station.

3. The wireless relay device according to claim 2, wherein: The transmitting unit transmits information indicating the transmission power of the downlink wireless signal to the terminal.

4. A base station, comprising: A communication unit that sends a downlink wireless signal to the wireless relay device; a transmitting unit configured to transmit information for setting a transmission power of the downlink wireless signal to the wireless relay device; and The control unit assumes that the transmission power of the downlink wireless signal transmitted to the terminal is controlled based on the information for setting the transmission power of the downlink wireless signal.

5. A wireless relay method, which is performed by a wireless relay device and comprises the following steps: Relay downlink wireless signals; receiving information for setting the transmission power of the downlink wireless signal via a downlink; and Based on the information for setting the transmission power of the downlink wireless signal, the transmission power of the downlink wireless signal transmitted to the terminal is controlled.

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