Wireless relay device and communication method

Abstract

The present invention provides a device and method for controlling relay operations based on the installation status of wireless relay devices. [Solution] In a wireless communication system, the wireless relay device 30 includes a transmitting unit 310 that transmits a first signal to the base station for the base station to recognize the device, a receiving unit 320 that receives a second signal from the base station granting permission to operate as the wireless relay device 30, and a control unit 330 that, when the receiving unit 320 receives the second signal, enables the relay function by transmitting the signal received from the base station to a terminal and transmitting the signal received from the terminal to the base station. The transmitting unit 310 transmits a third signal to the base station indicating a request to enable the relay function.

Description

Technical Field

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

Background Art

[0002] In 3GPP (3rd Generation Partnership Project), in order to achieve further increase in system capacity, further increase in data transmission speed, further reduction in latency in the wireless section, etc., a wireless communication method called 5G or NR (New Radio) (hereinafter, this wireless communication method is referred to as "NR") is being studied. In 5G, in order to meet the requirement of achieving a throughput of 10 Gbps or more and reducing the latency in the wireless section to 1 ms or less, various wireless technologies and network architectures are being studied (for example, Non-Patent Document 1).

[0003] In next-generation communication, the use of high-frequency bands is expected. From the viewpoints of reduction in the number of scatterers, reduction in the shadowing effect, and increase in distance attenuation due to the characteristics of the high-frequency band, improvement in communication quality is required. Beam control and environment, etc. for ensuring communication quality are assumed to be necessary.

[0004] For example, in the high-frequency band, there is a problem that a dead zone is likely to occur due to the strong directivity of radio waves, etc. Therefore, a method of improving communication quality in a multipath environment has been tried using a passive repeater or an active type reflector (RIS: Reconfigurable Intelligent Surface), a smart repeater that receives and amplifies a signal and re-radiates it, etc. (for example, Non-Patent Document 2).

Prior Art Documents

Non-Patent Documents

[0005]

Non-Patent Document 1

[0006] Reflectors or wireless relay devices such as smart repeaters, which relay radio waves by reflecting or transmitting them from radio wave sources such as base stations to radio wave receiving destinations such as terminals, may be installed by users other than network operators. While allowing users to freely install wireless relay devices enables improvements to the network environment according to user needs, the network side needs to control the relay function according to the installation status of the wireless relay devices.

[0007] The present invention has been made in view of the above points, and aims to control the relay operation in a wireless communication system based on the installation status of a wireless relay device. [Means for solving the problem]

[0008] According to the disclosed technology, a wireless relay device is provided, comprising: a transmitting unit that transmits a first signal to a base station for the base station to recognize the device; a receiving unit that receives a second signal from the base station relating to permission to operate as a wireless relay device; and a control unit that, when the receiving unit receives the second signal, enables a relay function that transmits the signal received from the base station to a terminal and transmits the signal received from the terminal to the base station, wherein the transmitting unit transmits a third signal to the base station indicating a request to enable the relay function. [Effects of the Invention]

[0009] According to the disclosed technology, in a wireless communication system, relay operations can be controlled based on the installation status of wireless relay devices. [Brief explanation of the drawing]

[0010] [Figure 1] This figure illustrates a wireless communication system in an embodiment of the present invention. [Figure 2] This figure shows an example of the functional configuration of the base station 10 in an embodiment of the present invention. [Figure 3] This figure shows an example of the functional configuration of terminal 20 in an embodiment of the present invention. [Figure 4] This figure shows an example of the functional configuration of the wireless relay device 30 in an embodiment of the present invention. [Figure 5] This figure shows an example of the operation of the wireless relay device 30 in an embodiment of the present invention. [Figure 6] This figure shows an example of communication in the high-frequency band. [Figure 7] This figure shows an example of a reflective type wireless relay device 30 in an embodiment of the present invention. [Figure 8] This figure shows an example of a transparent wireless relay device 30 in an embodiment of the present invention. [Figure 9] This figure shows an example of operation (1) of a wireless relay device in an embodiment of the present invention. [Figure 10] This figure shows an example of operation (2) of a wireless relay device in an embodiment of the present invention. [Figure 11] This figure shows an example of the hardware configuration of a base station 10 or terminal 20 in an embodiment of the present invention. [Figure 12] This figure shows an example of the configuration of a vehicle 2001 in an embodiment of the present invention. [Modes for carrying out the invention]

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

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

[0013] Also, in the embodiments of the present invention described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel), etc. used in existing LTE are used. This is for convenience of description, and signals, functions, etc. similar to these may be called by other names. Also, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even for signals used in NR, the "NR-" is not necessarily specified.

[0014] In addition, in the embodiments of the present invention, the duplex mode may be a TDD (Time Division Duplex) mode, an FDD (Frequency Division Duplex) mode, or other modes (e.g., Flexible Duplex, etc.).

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

[0016] Figure 1 is a diagram illustrating a wireless communication system in an embodiment of the present invention. The wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20, as shown in Figure 1. There may be multiple base stations 10 and terminals 20.

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

[0018] Base station 10 is capable of performing carrier aggregation, which involves bundling multiple cells (multiple CCs (component carriers)) together to communicate with terminal 20. Carrier aggregation uses one primary cell (PCell) and one or more secondary cells (SCell).

[0019] The base station 10 transmits synchronization signals and system information to the terminal 20. Synchronization signals include, for example, NR-PSS and NR-SSS. System information is transmitted via, for example, NR-PBCH or PDSCH, and is also called broadcast information. As shown in Figure 1, the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Here, signals transmitted via control channels such as PUCCH and PDCCH are called control signals, and signals transmitted via shared channels such as PUSCH and PDSCH are called data, but this is just one example of terminology.

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

[0021] Terminal 20 is capable of performing carrier aggregation, which involves bundling multiple cells (multiple CCs) together to communicate with base station 10. Carrier aggregation uses one primary cell and one or more secondary cells. A PUCCH-SCell with PUCCH may also be used.

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

[0023] Base stations 10A and 10D are base stations operated with 5G or 6G. Base stations 10A and 10D each form cells A and D, which are smaller in size compared to macrocells. Cells A and D may also be called small cells or macrocells. As shown in Figure 1, cells A and D may be formed to be included in a macrocell.

[0024] A macrocell can generally be interpreted as a communication area with a radius of several hundred meters to several tens of kilometers covered by a single base station. A small cell, on the other hand, can be interpreted as a general term for cells with low transmission power that cover a smaller area compared to a macrocell.

[0025] Furthermore, base station 10 and base stations 0A-10D may be denoted as gNodeB (gNB) or BS (Base Station), etc. Also, terminal 20 may be denoted as UE or MS, etc. Moreover, the specific configuration of the wireless communication system, including the number and types of base stations and terminals, is not limited to the example shown in Figure 1.

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

[0027] Base stations 10 and 10A-10D perform wireless communication with terminal 20 in accordance with 5G or 6G, as an example. Base stations 10 and 10A-10D and terminal 20 may support Massive MIMO, which generates a more directional beam by controlling the radio signals transmitted from multiple antenna elements; Carrier aggregation (CA), which uses multiple component carriers (CCs) bundled together; Dual connectivity (DC), which enables simultaneous communication between terminal 20 and each of the two NG-RAN nodes; and Integrated Access and Backhaul (IAB), which integrates wireless backhaul between wireless communication nodes such as gNBs and wireless access to terminal 20.

[0028] Furthermore, wireless communication systems may support higher frequency bands than those specified in 3GPP Release 15 (Frequency Range, FR). For example, FR1 may support 410 MHz-7.125 GHz, and FR2 may support 24.25 GHz-52.6 GHz. In addition, wireless communication systems may support frequency bands exceeding 52.6 GHz up to 114.25 GHz. This frequency band may be called the millimeter wave band.

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

[0030] Furthermore, the wireless communication system may include a wireless relay device 30. In embodiments of the present invention, for example, the wireless relay device 30 may be a reflector (RIS), a phase-controlled reflector, a passive repeater, an IRS (Intelligent Reflecting Surface), etc. Specific examples of a reflector (RIS: Reconfigurable Intelligent Surface) may include a metamaterial reflector, a dynamic metasurface, a metasurface lens, etc. (see, for example, Non-Patent Document 2).

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

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

[0033] Furthermore, in embodiments of the present invention, the wireless repeater 30, such as a RIS, may also be called a battery-less device, a metamaterial functional device, an intelligent reflecting surface, a smart repeater, etc. As an example, the wireless repeater 30, such as a RIS or smart repeater, may be defined as having the functions shown in 1)-5) below.

[0034] 1) The base station 10 may have a function to receive signals transmitted from the base station 10. These signals may be DL signals, 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-specific signals, etc. The base station 10 may also have a function to receive signals that carry information related to metamaterial functions. The base station 10 may also have a function to transmit these signals to the terminal 20.

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

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

[0037] 4) The base station 10 or terminal 20 may have a function to reflect signals transmitted from the base station 10 or terminal 20. For example, the reflection function may be a function related to phase change, a function related to beam control (e.g., a function related to the control of TCI (Transmission Configuration Indication)-state and QCL (Quasi Co Location), selective beam application, and selective application of spatial filters / precoding weights). 5) The base station 10 or terminal 20 may have a power modification function for the signal transmitted from the base station 10 or terminal 20. For example, the power modification function may be power amplification.

[0038] Furthermore, in the case of a wireless relay device 30 such as an RIS or smart repeater, "receive and transmit" or "relay" may mean that the following functions A are performed, but the transmission is performed without performing functions B below. Function A: Apply a phase shifter. Function B: No compensation circuit (e.g., amplification, filtering) is used.

[0039] As another example, Function A: Apply a phase shifter and compensation circuit. Function B: No frequency conversion is involved.

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

[0041] (Device configuration) Next, an example of the functional configuration of a base station 10, a terminal 20, and a wireless relay device 30 that perform the processing and operations in the embodiment of the present invention will be described. The base station 10, terminal 20, and wireless relay device 30 include functions that perform the embodiments described later. However, the base station 10, terminal 20, and wireless relay device 30 may each have only one of the functions from the embodiments.

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

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

[0044] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20 in a storage device and reads it from the storage device as needed. The control unit 140 performs tasks such as resource allocation and overall control of the base station 10. Note that the signal transmission function in the control unit 140 may be included in the transmission unit 110, and the signal reception function in the control unit 140 may be included in the reception unit 120. The transmission unit 110 and the reception unit 120 may also be referred to as the transmitter and receiver, respectively.

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

[0046] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and obtains signals from higher layers from the received physical layer signals. The transmitting unit 210 also transmits a HARQ-ACK, and the receiving unit 220 receives configuration information and the like, as described in the embodiment.

[0047] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device and reads it from the storage device as needed. The setting unit 230 also stores pre-set setting information. The control unit 240 controls the entire terminal 20. The signal transmission function of the control unit 240 may be included in the transmission unit 210, and the signal reception function of the control unit 240 may be included in the reception unit 220. The transmission unit 210 and the reception unit 220 may also be called the transmitter and receiver, respectively.

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

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

[0050] The variable unit 340 is connected to the antenna unit 350 and can change the phase, load, amplitude, etc. For example, the variable unit 340 may be a variable phase shifter, a phase shifter, an amplifier, etc. For example, by changing the phase of the radio waves that arrive at the relay antenna from the radio wave source, the direction or beam of the radio waves can be changed.

[0051] The control unit 330 is a control means for controlling the variable unit 340. In an embodiment of the present invention, the control unit 330 functions as a control unit that controls the relay state when relaying radio waves from the base station 10 or terminal 20 without signal interpretation. Here, the control unit 330 may change the relay state based on control information received from the base station 10 or terminal 20 via the communication unit, or it may change the relay state based on the reception state of radio waves from the base station 10 or terminal 20. For example, the control unit 330 may select an appropriate receiving beam and transmitting beam (direction) based on control information such as SSB, and control the variable unit 340. Similarly, the control unit 330 may select an appropriate combination of receiving direction and transmitting direction based on the reception state, based on criteria such as the highest reception quality or highest received power, and control the variable unit 340.

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

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

[0054] Furthermore, the control unit 330, based on the reception state during control of the variable unit 340 (for example, changes in received power, etc.), generates propagation path information (H) between the radio wave source (for example, base station 10A or terminal 20) and the antenna unit 350. PT and H RP ) may be estimated.

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

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

[0057] As a specific example, when the wireless quality is good, the base station 10A and the terminal 20 transmit and receive wireless signals directly without going through the wireless relay device 30. On the other hand, if the wireless quality deteriorates, such as when there is an obstruction between the base station 10A and the terminal 20, the wireless relay device 30 relays the wireless signals transmitted and received between the base station 10A and the terminal 20.

[0058] Specifically, the wireless relay device 30 receives propagation path information H between the base station 10A or terminal 20 and the relay antenna based on the change in received power when controlling the variable unit 340 such as a variable phase meter. PT H RT The system estimates the propagation path information and, based on the estimated propagation path information, controls the variable unit 340, such as a variable phase shifter, to relay the wireless signal to the radio wave receiving destination, such as the terminal 20. PT H RT The wireless relay device 30 is not limited to estimating the radio frequency, but may also relay the radio signal to the radio wave receiving destination such as the base station 10A or terminal 20 by controlling a variable unit 340 such as a variable phase shifter based on control information received from the base station 10A or terminal 20.

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

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

[0061] Figure 6 shows an example of communication in the high-frequency band. As shown in Figure 6, when using high-frequency bands of several GHz to tens of GHz or higher, dead zones are likely to occur due to the strong directivity of radio waves. When there is a line of sight between the base station 10A and the terminal 20, the use of the high-frequency band does not affect wireless communication between the base station 10A and the terminal 20. On the other hand, if the line of sight between the base station 10A and the terminal 20 is blocked by an obstruction such as a building or tree, the wireless quality deteriorates significantly. In other words, if the terminal 20 moves into a dead zone where it is blocked by an obstruction, communication may be interrupted.

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

[0063] Therefore, technologies have been developed that can relay radio waves between the base station 10A and the terminal 20, such as RIS or smart repeater radio wave propagation control devices. In this way, communication characteristics can be improved by controlling the propagation characteristics of the base station signal, expanding coverage without the need for a signal source, and reducing installation and operating costs by adding base stations.

[0064] Conventional radio wave propagation control devices come in two types: passive and active. Passive devices have the advantage of not requiring control information, but they cannot track moving objects or environmental changes. On the other hand, active devices require control information and have the disadvantage of increased overhead, but they can variably control the radio wave propagation characteristics by changing the load (phase) state of the control antenna, and can track moving objects and environmental changes.

[0065] There are two types of active radio wave propagation control devices and control methods: feedback (FB) norms and propagation path information norms. In the FB norm, a variable radio wave propagation control device randomly changes the load (phase) state and receives feedback on the communication state to terminal 20, etc., to search for optimal conditions. On the other hand, in the propagation path information norm, the load state is determined based on propagation path information between the base station and the radio wave propagation control device, enabling optimal radio wave propagation control. In embodiments of the present invention, either type is applicable.

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

[0067] Figure 7 shows an example of a reflective wireless relay device 30 in an embodiment of the present invention. An example of the system configuration of the reflective wireless relay device 30 will be explained using Figure 7. Figure 7 shows the relationship between a transmitting antenna Tx such as a base station 10A, a relay antenna Sx of a transmissive wireless relay device 30, and a receiving antenna Rx such as a terminal 20. As shown in Figure 7, in an embodiment of the present invention, MIMO is used as an example, and there are multiple propagation paths between Tx and Sx and multiple propagation paths between Sx and Rx, and the wireless relay device 30 relays radio waves by controlling a variable unit 340 having a variable phase meter of the relay antenna Sx.

[0068] As shown in Figure 7, in the case of a reflective antenna, the array of repeater antennas are arranged facing the same direction. This makes it possible to estimate the propagation path of the repeater antennas based on the reception state observed when the phase conditions of the repeater antennas are changed multiple times.

[0069] Figure 8 shows an example of a transparent wireless relay device 30 in an embodiment of the present invention. An example of the system configuration of the transparent wireless relay device 30 will be explained using Figure 8. Figure 8 shows the relationship between a transmitting antenna Tx such as a base station 10A, a relay antenna Sx of the transparent wireless relay device 30, and a receiving antenna Rx such as a terminal 20. As shown in Figure 8, in the embodiment of the present invention, MIMO is used as an example, and there are multiple propagation paths between Tx and Sx and multiple propagation paths between Sx and Rx, and the wireless relay device 30 relays radio waves arriving from one side to the other side via a variable part 340 such as a variable phase shifter of the relay antenna Sx, as shown in the figure. In this way, in the transparent type, the reference antenna on the left side of the figure and the relay antenna on the right side of the figure are arranged in pairs facing opposite directions so that radio waves arriving from one side can be relayed to the other side. In either the transparent or reflective type, the system may be configured to detect the power received by the relay antenna using a power detector or the like, and the reception state may be measured. Furthermore, the propagation path of the relay antenna can be estimated based on the received signals observed when the phase conditions of the relay antenna are changed in multiple ways.

[0070] For example, future networks such as 6G will require even higher quality than 5G. For instance, ultra-high speeds on the order of terabits per second, high reliability and low latency at the level of optical communication, etc., will be required. To achieve this quality, the use of very high frequencies, such as tera-Hz waves, is anticipated. For example, when using very high frequencies such as tera-Hz waves, the advantages are expected to be high speed due to the use of ultra-wideband and low latency due to the short symbol length. However, disadvantages are also expected, such as narrow coverage due to the large attenuation rate and reduced reliability due to high directivity. For each point where 6G communication is required, it will be necessary to consider how to ensure redundancy, that is, how to increase the number of communication transmission points.

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

[0072] Furthermore, RIS may be any of the names shown in 1)-4) below, but is not limited to these. 1) Battery-less device 2) Metamaterial Functional Device 3) Intelligent reflecting surface 4) Smart repeater

[0073] RIS can be any device having a predetermined function, and that predetermined function may be at least one of the following functions 1) and 2).

[0074] 1) UE function A function to receive signals transmitted from the base station 10 (e.g., DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, RIS-dedicated signals). This receiving function may also receive information related to the metamaterial function described in 2) below. A function to transmit signals to the base station 10 (e.g., UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS-dedicated signals). This transmitting function may also transmit information related to the metamaterial function described in 2) below. A frame synchronization function with the base station 10.

[0075] 2) Metamaterial function A function to reflect signals transmitted from the base station 10 or terminal 20 (e.g., phase change). Signal reflection may be performed by changing the phase for each of the multiple reflecting elements of the RIS, or a common phase change may be performed for multiple reflecting elements. Functions related to beam control (e.g., functions related to TCI-state and QCL control, selective beam application, selective application of spatial filters / precoding weights). A function to change the power of signals transmitted from the base station 10 or terminal 20 (e.g., power amplification). Different power changes may be performed for each of the reflecting elements of the RIS, or a common power change may be performed for multiple reflecting elements.

[0076] In RIS (Radio Station), "receive and transmit" may also mean reflecting radio waves / signals. Hereafter, the terms "base station" and "terminal" will be used, but they are not limited to these and may be replaced with communication devices. RIS may also be replaced with smart repeaters, relay devices, etc.

[0077] For example, RIS may operate under the assumptions shown in 1)-6) below. 1) The network operator configures the RIS. 2) The RIS is fixed and does not move. 3) RIS relays signals from only one base station. 4) Capable of receiving and transmitting control signals. 5) Operates using half-double-duplex signaling. 6) Single RIS environment

[0078] Here, wireless relay devices such as reflectors or smart repeaters, which reflect or transmit radio waves from a radio wave source such as a base station to a radio wave receiving destination such as a terminal, may be installed by users other than the network operator. By allowing users to freely install wireless relay devices, it becomes possible to improve the network environment according to the user's needs. For example, a user may install a wireless relay device on the wall or window of a building to make it easier to use high-frequency bands indoors. On the other hand, the network side needs to control the relay function according to the installation status of the wireless relay devices.

[0079] Therefore, the network may discover the RIS. The network may then authorize the discovered RIS to perform relay operations and control whether the relay operations are ON or OFF.

[0080] Figure 9 shows an example of operation (1) of a wireless relay device in an embodiment of the present invention. As shown in Figure 9, the RIS 30 may send and receive signals for the base station 10 to recognize itself and report to the base station 10.

[0081] RIS30 may discover a base station that can be synchronized / connected to, or RIS30 may be discovered by a base station that can be synchronized / connected to. Regarding synchronization / connection, RIS30 may perform operations related to synchronization / connection with base station 10. For example, RIS30 may synchronize based on the SSB transmitted from base station 10 and send a connection request to base station 10.

[0082] Regarding the initial connection between the base station 10 and the terminal 20, the RIS 30 may receive and transmit signals related to the initial connection transmitted from the base station 10 and the terminal 20 (beam control in the RIS 30). For example, the RIS 30 may direct the beam based on each SSB index. Furthermore, the RIS 30 may perform the following operations when performing beam control (beam control based on control information from the base station 10) during communication after the connection between the base station and the terminal has been established. Note that beam control may be performed specifically for the UE.

[0083] RIS30 may receive / decode control information from base station 10. For example, in order to perform beam control, RIS30 may receive / decode CSI information, terminal 20 and / or base station 10 location information from base station 10. RIS30 may perform beam control based on the control information received / decoded from base station 10. For example, it may perform beam switching when multiple terminals 20 exist, or RIS30 may report communication-related information to base station 10, or RIS30 may report the communication quality on its side to base station 10.

[0084] Furthermore, RIS30 may report at least one of the pieces of information shown in 1)-9) below to base station 10.

[0085] 1) Capabilities related to RIS functions 2) Information related to the location of the RIS (e.g., GNSS (Global Navigation Satellite System) information, latitude and longitude, altitude, area formation angle, orientation, etc.) 3) Information relating to the area where construction is desired or possible. 4) PLMN to connect to 5) Relayable frequency resources and / or time resources (including TDD settings, XDD (Cross division duplex) settings, FD (Full-duplex) settings, etc.) 6) Radio characteristics of the beam 7) Processing time related to beam switching 8) Information indicating whether the RIS is operator-installed or user-installed. 9) Channel status (Target frequency, channel usage status, interference power value / level, other detectable base stations 10, information related to propagation characteristic measurements, etc.)

[0086] Note that the channel state described in 9) above may be the channel state between RIS30 and base station 10, or it may be the channel state between RIS30 and terminal 20.

[0087] As described above, by reporting from RIS30 to base station 10, the network can determine whether or not to have RIS30 perform its relay function, thereby achieving efficient area formation and avoidance of increased interference.

[0088] Figure 10 shows an example of operation (2) of a wireless relay device in an embodiment of the present invention. As shown in Figure 10, the RIS 30 may receive a signal from the base station 10 granting permission to operate as a RIS.

[0089] RIS30 may control the activation or deactivation of its reflection or radiation function based on higher-layer settings and / or physical layer instructions from other network nodes. The higher-layer settings may be RRC (Radio Resource Control) signaling or MAC (Medium Access Control)-CE (Control Element). The physical layer instructions may be DCI (Downlink Control Information) or UCI (Uplink Control Information). Activation or deactivation may mean turning the function ON / OFF, or activating / deactivating the function. Furthermore, activation of RIS30, turning the function ON, or activating the function may indicate that base station 10 has authorized RIS30 to perform relay operations.

[0090] For example, the information element (IE) of an RRC signaling system may be as follows: RepeaterConfig ::= SEQUENCE { repeaterState ENUMERATED {activated, deactivated} OPTIONAL, -- Need M }

[0091] For example, RIS30 may control activation or deactivation based on settings and / or instructions from base station 10. Such settings and / or instructions may be higher-layer settings or physical layer instructions.

[0092] Base station 10 transmits settings and / or instructions related to the reflection / radiation function to RIS 30. Subsequently, RIS 30 enables or disables the reflection / radiation function based on the settings and / or instructions. Hereinafter, "reflection / radiation" may mean reflection or radiation, or reflection and radiation.

[0093] For example, RIS30 may control activation or deactivation based on settings and / or instructions from terminal 20. These settings and / or instructions may be higher-layer settings or physical layer instructions.

[0094] Terminal 20 transmits settings and / or instructions related to the reflection / radiation function to RIS 30. Subsequently, RIS 30 enables or disables the reflection / radiation function based on these settings and / or instructions.

[0095] For example, RIS30 may control activation or deactivation based on settings and / or instructions from base station 10 and terminal 20. Such settings and / or instructions may be higher-layer settings or physical layer instructions. do.

[0096] Base station 10 transmits settings and / or instructions related to the reflection / radiation function to RIS 30. Terminal 20 transmits settings and / or instructions related to the reflection / radiation function to RIS 30. Based on these settings and / or instructions, RIS 30 enables or disables the reflection / radiation function.

[0097] Here, RIS30 may apply the same settings and / or instructions only if it receives the same settings and / or instructions from both base station 10 and terminal 20. For example, RIS30 may enable the reflect / radiate function if it receives the enable setting and / or instructions from both base station 10 and terminal 20. For example, RIS30 may disable the reflect / radiate function if it receives the disable setting and / or instructions from both base station 10 and terminal 20.

[0098] Furthermore, RIS30 may autonomously determine whether to enable or disable the reflection / radiation function. For example, if RIS30 does not receive settings and / or instructions related to the reflection / radiation function from the base station 10 and terminal 20, it may perform a predetermined autonomous operation.

[0099] When the RIS30 controls the activation or deactivation of the reflection / radiation function based on higher layer settings and / or instructions from the base station 10 or terminal 20, the activation or deactivation state may be set directly and semistatically, or the duration of the activation or deactivation state may be set semistatically.

[0100] If the RIS30 is dynamically instructed to enable or disable the reflection / radiation function by a physical layer control signal (e.g., PDCCH or PUCCH) from the base station 10 or terminal 20, the time from receiving the physical layer control signal to applying the enable or disable may be specified in the specification, instructed by the physical layer control signal, or a minimum time may be specified, and the RIS30 does not need to assume that a time shorter than the minimum time will be instructed.

[0101] When the RIS30 is dynamically instructed to enable or disable the reflection / radiation function by a physical layer control signal (e.g., PDCCH or PUCCH) from the base station 10 or terminal 20, it may disable the reflection / radiation function after reflecting / radiating the PDSCH and PUCCH scheduled for the DL grant when it has reflected / radiated a PDCCH including a DL grant.

[0102] When the RIS30 is dynamically instructed to enable or disable the reflection / radiation function by a physical layer control signal (e.g., PDCCH or PUCCH) from the base station 10 or terminal 20, it may disable the reflection / radiation function after reflecting / radiating a PDCCH that includes a UL grant and then reflecting / radiating a PUSCH scheduled with that UL grant.

[0103] When RIS30 detects a configured UL (Ultraviolet) signal triggered by terminal 20, it may enable or disable the reflection / emission function. In other words, the UL signal from terminal 20 may be used as a WUS (Wake-up signal).

[0104] RIS30 may enable or disable the reflection / radiation function when it detects a signal from terminal 20 that instructs the activation or deactivation of the reflection / radiation function, if the base station 10 and / or terminal 20 have set the signal to be valid. In other words, the UL signal and WUS from terminal 20 may be transmitted separately. Terminal 20 may always transmit the signal before transmitting the UL, or it may transmit the signal only when RIS30 has disabled the reflection / radiation function.

[0105] RIS30 determines whether the reception quality of a given signal is above a threshold. If the reception quality of the given signal is above the threshold, RIS30 may enable the reflection / radiation function.

[0106] RIS30 determines whether the reception quality of a given signal is below a threshold. If the reception quality of the given signal is above the threshold, RIS30 may disable the reflection / radiation function.

[0107] The predetermined signal may be SSB from base station 10, TRS from base station 10, or SRS from terminal 20. A signal for measuring reception quality may be defined or set as the predetermined signal. The reception quality may be RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), or SINR (Signal to interference plus noise ratio). The threshold may be defined in the specifications or set by another node. Furthermore, hysteresis may be set for the threshold, and it may be enabled if the reception quality exceeds the threshold N times in a row during the defined or set reception quality measurement opportunities, and disabled if it falls below the threshold N times in a row.

[0108] RIS30 may control the enabling or disabling of the reflection / radiation function for both DL and UL, or it may control the enabling or disabling of the reflection / radiation function independently for DL ​​and UL.

[0109] The specification may define whether DL and UL are controlled commonly or independently, or they may be configured or instructed from other nodes. If they are controlled commonly, for example, they may be controlled commonly from base station 10 using upper layer settings, or from base station 10 using physical layer control signals, or from terminal 20 using upper layer settings, or from terminal 20 using physical layer control signals.

[0110] When controlled independently, for example, DL may be controlled by a higher layer setting from base station 10, and UL may be controlled by a physical layer control signal from terminal 20. Alternatively, DL may be controlled by a physical layer control signal from base station 10, and UL may be controlled by a physical layer control signal from terminal 20. Alternatively, DL may be controlled by a physical layer control signal from base station 10, and UL may be controlled by a higher layer setting from terminal 20. Alternatively, DL may be controlled by a higher layer setting from base station 10, and UL may be controlled by a higher layer setting from terminal 20.

[0111] When the reflection / radiation function is enabled, RIS30 may reflect / radiate all signals from base station 10 and terminal 20. The period during which the reflection / radiation function is enabled may be the period during which an RRC connection state is established with base station 10, or the period during which an RRC connection state is established with terminal 20. For example, RIS30 may maintain its activation when it receives a WUS in the PDCCH MO (Monitoring Occasion), such as in CDRX (Connected mode DRX) with base station 10, and deactivate it until the next MO if it does not receive a WUS.

[0112] When the reflection / radiation function of RIS30 is disabled, it does not need to reflect / radiate signals from base station 10 and terminal 20. The period during which the reflection / radiation function is disabled may be the period when the RRC state with base station 10 is RRC idle or RRC inactive, or the period when the RRC state with terminal 20 is RRC idle or RRC inactive. For example, if the main circuit receives a PEI (Paging Early Indication) which is a WUS before a PO (Paging Occasion), it may maintain the function's activation, and if no PEI is received, it may be disabled until the next PEI. For example, the reflection / radiation function of the main circuit may be disabled, and if a WUS is received by a passive circuit dedicated to WUS reception, the reflection / radiation function of the main circuit may be activated.

[0113] The RIS30 may also control the enabling or disabling of reflection / radiation in conjunction with the RRC connection status between the terminal 20 connected to or reflecting / radiating signals to the base station 10.

[0114] The RIS 30 may change the enabled or disabled state of reflection / radiation based on instructions from a terminal 20 connected to or reflecting / radiating signals from its own device. For example, if the terminal 20 detects a UL signal that can be transmitted in RRC idle or inactive mode, the RIS 30 may change the enabled or disabled state of reflection / radiation, for example, by enabling it. That is, the UL signal from terminal 20 may be used as WUS.

[0115] The UL signal may be PRACH in a 4-step random access procedure, MsgA in a 2-step random access procedure, or CG-PUSCH in SDT (Small Data Transmission), etc. Furthermore, if the RIS 30 is configured to receive the UL signal from the base station 10 and / or terminal 20, it may enable or disable the reflection / radiation function upon detecting the signal. That is, the UL signal and WUS from terminal 20 may be transmitted separately. Terminal 20 may always transmit the signal before performing a UL transmission, or it may transmit the signal only when the RIS 30 has disabled its reflection / radiation function.

[0116] Furthermore, RIS30 may be authorized to operate as a RIS if it receives higher-layer parameters related to its operation as a RIS. Also, RIS30 may be assumed to be authorized to operate as a RIS when it connects to or establishes communication with base station 10. Additionally, RRC signaling, MAC-CE, or DCI notification related to authorization of relay operation may be defined, and RIS may be assumed to be authorized to operate as a RIS when it receives such signaling.

[0117] The signal granting permission for relay operation may include the information shown in 1)-4) below. 1) Parameters related to applicable beam settings 2) Parameters related to power control 3) Parameters relating to time, frequency, space, and / or code resources for which relay operation is permitted 4) Parameters related to the frequencies on which relay operation is permitted (e.g., band, band combination, carrier component, frequency range, etc.)

[0118] As described above, by granting permission for relay operation to the RIS 30 from the base station 10, relay operation can be performed only on RIS 30 that the network has determined should perform the relay function, thereby achieving efficient area formation and avoidance of increased interference.

[0119] RIS30 may request base station 10 to either A) authorize operation as a RIS, or B) instruct to enable RIS functionality. A) Authorization to operate as a RIS may be requested before base station 10 authorizes RIS30 to perform relay operations. B) Instruction to enable RIS functionality may be requested after base station 10 authorizes RIS30 to perform relay operations.

[0120] RIS30 may explicitly or implicitly include a signal requesting A) or B) above in its transmissions during operations related to establishing connection / communication with base station 10.

[0121] Furthermore, the RIS30 may explicitly or implicitly include a signal requesting A) or B) above in the signal used to recognize itself by the base station 10 as described above.

[0122] RRC signaling, MAC-CE, and DCI notifications relating to the request in A) or B) above are defined, and RIS30 may transmit such signaling to base station 10 based on predetermined conditions.

[0123] For example, RIS30 may autonomously transmit the signaling to base station 10. For example, RIS30 may transmit the signaling to base station 10 when it is in a state where it can perform its functions as a RIS under predetermined conditions. For example, RIS30 may determine whether or not to transmit the signaling based on a signal (e.g., SSB-RSRP) received from base station 10. For example, RIS30 may transmit the signaling to base station 10 when the SSB-RSRP is above a threshold under predetermined conditions. For example, RIS30 may determine whether or not to transmit the signaling based on the surrounding environment measured by the RIS (e.g., channel status, number of UEs, requests from UEs, etc.). For example, RIS30 may transmit the signaling to base station 10 when it receives a request from a UE under predetermined conditions.

[0124] As described above, by sending a request from the RIS 30 to the base station 10 to perform relay operations, it is possible to request the network to use the RIS installed based on the user's request, thereby enabling on-demand area construction.

[0125] As described above, even when the RIS 30 is installed by a user, it can relay signals effectively and improve communication quality by reporting necessary information to the base station 10 and determining whether or not to allow the network to perform relay operations.

[0126] In other words, in a wireless communication system, relay operations can be controlled based on the installation status of the wireless relay device.

[0127] (Hardware configuration) The block diagrams (Figures 2, 3, and 4) used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the above one device or the above multiple devices with software.

[0128] Functions include, but are not limited to, judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0129] For example, the base station 10, terminal 20, and wireless relay device 30 in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 11 is a diagram showing an example of the hardware configuration of the base station 10, terminal 20, and wireless relay device 30 according to one embodiment of the present disclosure. The base station 10, terminal 20, and wireless relay device 30 described above may be physically configured as a computer device including a processor 1001, storage device 1002, auxiliary storage device 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0130] In the following explanation, the term "device" can be read as "circuit," "device," "unit," etc. The hardware configuration of the base station 10, terminal 20, and wireless relay device 30 may include one or more of the devices shown in the figure, or it may be configured to omit some of the devices.

[0131] Each function in the base station 10, terminal 20, and wireless relay device 30 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and auxiliary storage device 1003.

[0132] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0133] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes a computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 2 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 3 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunications line.

[0134] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: 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 called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of this disclosure.

[0135] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0136] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include high-frequency switches, duplexers, filters, frequency synthesizers, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmitting and receiving antennas, amplifier section, transmitting and receiving section, transmission path interface, etc., may be implemented by the communication device 1004. The transmitting and receiving section may be implemented in a physically or logically separated manner, with a transmitting section and a receiving section.

[0137] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0138] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0139] Furthermore, the base station 10, terminal 20, and wireless relay device 30 may be configured to include hardware such as a microprocessor, digital signal processor (DSP), application-specific integrated circuit (ASIC), programmable logic device (PLD), and field programmable gate array (FPGA), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0140] Furthermore, the wireless relay device 30 may include, as necessary, hardware components constituting the variable section 340 and the antenna section 350, such as a variable phase shifter, a phase shifter, an amplifier, an antenna, an array antenna, etc.

[0141] Figure 12 shows an example of the configuration of vehicle 2001. As shown in Figure 12, vehicle 2001 comprises a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0142] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0143] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0144] Signals from various sensors 2021-2029 include current signals from current sensor 2021 which senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, front and rear wheel air pressure signals obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depression signals obtained by accelerator pedal sensor 2029, brake pedal depression signals obtained by brake pedal sensor 2026, shift lever operation signals obtained by shift lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0145] The Information Services Unit 2012 consists of various devices for providing various types of information, such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0146] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0147] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0148] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0149] The communication module 2013 transmits current signals from current sensors input to the electronic control unit 2010 to an external device via wireless communication. The communication module 2013 also transmits, via wireless communication, other signals input to the electronic control unit 2010, including front and rear wheel rotation speed signals obtained by the rotation speed sensor 2022, front and rear wheel air pressure signals 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 signals obtained by the accelerator pedal sensor 2029, brake pedal depression signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, and detection signals obtained by the object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0150] The communication module 2013 receives various information (traffic information, signal information, distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 installed in the vehicle 2001. The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., installed in the vehicle 2001.

[0151] (Summary of the embodiments) As described above, according to an embodiment of the present invention, a wireless relay device is provided which includes a transmitting unit that transmits a first signal to a base station for the base station to recognize the device, a receiving unit that receives a second signal from the base station granting permission to operate as a wireless relay device, and a control unit that, when the receiving unit receives the second signal, enables a relay function that transmits the signal received from the base station to a terminal and transmits the signal received from the terminal to the base station.

[0152] With the above configuration, even when the RIS 30 is installed by a user, it can report the necessary information to the base station 10 and determine whether or not to allow the network to perform relay operations, thereby suitably relaying signals and improving communication quality. In other words, in a wireless communication system, relay operations can be controlled based on the installation status of the wireless relay device.

[0153] The transmitting unit may transmit a third signal to the base station indicating a request to activate the relay function. With this configuration, the RIS 30 can report necessary information to the base station 10 and improve communication quality, even when installed by a user.

[0154] The transmitting unit may include information in the first signal indicating the channel status of communication with the base station or the terminal. With this configuration, even when the RIS 30 is installed by a user, it can report the necessary information to the base station 10 and determine whether or not to allow the network to perform relay operations, thereby suitably relaying signals and improving communication quality.

[0155] The receiving unit may acquire beam setting parameters applicable to the relay function from the second signal. With this configuration, even when the RIS 30 is installed by a user, it can receive necessary information from the base station 10 and determine whether or not to allow the network to perform relay operations, thereby suitably relaying signals and improving communication quality.

[0156] The transmitting unit may include the third signal in the first signal and transmit it to the base station. With this configuration, the RIS 30 can report necessary information to the base station 10 and improve communication quality, even when installed by a user.

[0157] Furthermore, according to an embodiment of the present invention, a communication method is provided in which a wireless relay device performs a transmission procedure of transmitting a first signal to a base station for the base station to recognize the device itself; a reception procedure of receiving a second signal from the base station relating to permission to operate as a wireless relay device; and a control procedure, upon receiving the second signal, of enabling a relay function that transmits the signal received from the base station to a terminal and transmits the signal received from the terminal to the base station.

[0158] With the above configuration, even when the RIS 30 is installed by a user, it can report the necessary information to the base station 10 and determine whether or not to allow the network to perform relay operations, thereby suitably relaying signals and improving communication quality. In other words, in a wireless communication system, relay operations can be controlled based on the installation status of the wireless relay device.

[0159] (Supplement to the embodiment) While embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as it does not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0160] Furthermore, the notification of information is not limited to the embodiments / models described herein and may be carried out by other methods. For example, the notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer 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 combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0161] Each aspect / embodiment described in this disclosure includes 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 (where x is, for example, an integer or 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)), and IEEE This may apply to at least one system utilizing 802.20, UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. It may also apply to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G).

[0162] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0163] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0164] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0165] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0166] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0167] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0168] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0169] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0170] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0171] The terms “system” and “network” as used in this disclosure are interchangeable.

[0172] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0173] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0174] In this disclosure, terms such as "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", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0175] A base station can accommodate one or more (e.g., three) cells. If a base station accommodates multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0176] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0177] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0178] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operation. 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.

[0179] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0180] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0181] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0182] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0183] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0184] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0185] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0186] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0187] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0188] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe. A subframe may further consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0189] Numerical logic may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerical logic may include, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0190] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a time unit based on neurology.

[0191] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0192] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0193] For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0194] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each terminal 20 to allocate wireless resources (such as the frequency bandwidth and transmission power available to each terminal 20) in TTI units. However, the definition of TTI is not limited to this.

[0195] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0196] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0197] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0198] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0199] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0200] Furthermore, the time domain of RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0201] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0202] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0203] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a particular neurology system in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. A Bandwidth Part (PRB) may be defined and numbered within a given BWP.

[0204] A BWP may include a BWP for UL (Ultraviolet Link) and a BWP for DL ​​(Download Link). One or more BWPs may be set for a terminal 20 within a single carrier.

[0205] At least one of the configured BWPs may be active, and terminal 20 does not need to be expected to send or receive a predetermined signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0206] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0207] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0208] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0209] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0210] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way.

[0211] <Note> The embodiments described above can also be further described as follows (see addendum).

[0212] (Note 1) A transmitting unit that transmits a first signal to the base station for the base station to recognize the device, A receiving unit that receives a second signal from the base station granting permission to operate as a wireless relay device, A wireless relay device having a control unit that, when the receiving unit receives the second signal, activates a relay function that transmits the signal received from the base station to the terminal and transmits the signal received from the terminal to the base station.

[0213] (Note 2) The wireless relay device according to Appendix 1, wherein the transmitting unit transmits a third signal indicating a request to activate the relay function to the base station.

[0214] (Note 3) The wireless relay device described in Appendix 1, wherein the transmitting unit includes in the first signal information indicating the channel status of communication with the base station or the terminal.

[0215] (Note 4) The receiving unit is a wireless relay device according to Appendix 1, which acquires parameters related to beam setting applicable to the relay function from the second signal.

[0216] (Note 5) The transmitting unit is a wireless relay device as described in Appendix 2, which includes the third signal in the first signal and transmits it to the base station.

[0217] (Note 6) A transmission procedure for transmitting a first signal to a base station for the base station to recognize the device, A receiving procedure for receiving a second signal from the base station relating to permission to operate as a wireless relay device, A communication method in which a wireless relay device performs a control procedure to enable a relay function that, upon receiving the second signal, transmits the signal received from the base station to the terminal and transmits the signal received from the terminal to the base station. [Explanation of Symbols]

[0218] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 devices 210 Transmitter 220 Receiver 230 Setting section 240 Control Unit 30 Wireless relay device 310 Transmitter 320 Receiver 330 Control Unit 340 Variable part 350 Antenna section 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive Unit 2003 Steering Department 2004 Accelerator pedal 2005 Brake pedal 2006 Shift Lever 2007 Front Wheel 2008 Rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 Rotation speed sensor 2023 Pneumatic Sensor 2024 Vehicle Speed ​​Sensor 2025 Accelerometer 2026 Brake Pedal Sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driver Support Systems Department 2031 Microprocessor 2032 memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. A transmitting unit that transmits a first signal to the base station for the base station to recognize the device, A receiving unit that receives a second signal from the base station granting permission to operate as a wireless relay device, The receiving unit has a control unit that, when it receives the second signal, enables a relay function that transmits the signal received from the base station to the terminal and transmits the signal received from the terminal to the base station. The transmitting unit is a wireless relay device that transmits a third signal indicating a request to activate the relay function to the base station.

2. The wireless relay device according to claim 1, wherein the transmitting unit includes in the first signal information indicating the channel status of communication with the base station or the terminal.

3. The wireless relay device according to claim 1, wherein the receiving unit acquires parameters related to beam setting applicable to the relay function from the second signal.

4. The wireless relay device according to claim 1, wherein the transmitting unit includes the third signal in the first signal and transmits it to the base station.

5. A transmission procedure for transmitting a first signal to a base station for the base station to recognize the device, A receiving procedure for receiving a second signal from the base station relating to permission to operate as a wireless relay device, A control procedure to enable a relay function that, upon receiving the second signal, transmits the signal received from the base station to the terminal and transmits the signal received from the terminal to the base station, A communication method in which a wireless relay device performs the steps of transmitting a third signal indicating a request to activate the relay function to the base station.

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