Terminal, base station, and communication method

Abstract

A terminal is provided with: a transmission / reception unit that transmits and receives a reference signal for positioning via a wireless relay device, and that receives information indicating a reflection position at which the wireless relay device reflects the reference signal; and a control unit that, when the reference signal is received, performs position positioning on the basis of the reflection position. The reflection position is associated with the resource of the reference signal.

Description

Technical Field

[0001] This invention relates to terminals, base stations, and communication methods. Background Technology

[0002] In NR (New Radio) (also known as "5G"), which is the successor system to LTE (Long Term Evolution), technologies are being researched to meet the requirements of high-capacity systems, high-speed data transmission, low latency, simultaneous connection of multiple terminals, low cost, and power saving (e.g., Non-Patent Literature 1).

[0003] In next-generation communications, high-frequency bands are expected to be used. From the perspective of the reduced number of scatterers, decreased shadowing effect, and increased range attenuation caused by the characteristics of this high-frequency band, improvements in communication quality are required. Beam control and environmental factors necessary to ensure communication quality are envisioned.

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

[0005] Existing technical documents

[0006] Non-patent literature

[0007] Non-patent document 1: 3GPP TS 38.300 V17.5.0 (2023-06)

[0008] Non-patent literature 2: NTT Docomo, "5G Advancement and 6G White Paper" (February 2021, Version 3.0) Internet <URL: https: / / www.nttdocomo.co.jp / binary / pdf / corporate / technology / whitepaper_6g / DOCOMO_6G_White_PaperJP_20210203.pdf> Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] In location positioning within wireless communication systems, the time difference of arrival (TDOA) and angle of arrival (ATO) of the signals between the base station and the terminal are used. Therefore, if the signals transmitted and received between the base station and the terminal pass through a signal relay (RIS), it may be impossible to accurately determine the location. Furthermore, in scenarios requiring centimeter-level high-precision location positioning, it is necessary to reduce the measurement error in location positioning.

[0011] Methods for solving problems

[0012] The terminal in this embodiment includes: a transceiver unit that transmits and receives reference signals for location positioning via a wireless relay device, and receives information indicating the reflection position of the reference signals reflected by the wireless relay device; and a control unit that, upon receiving the reference signals, performs location positioning based on the reflection position. The reflection position is associated with resources of the reference signals.

[0013] Invention Effects

[0014] According to this embodiment, the measurement error of location positioning using a wireless relay device can be reduced. Attached Figure Description

[0015] Figure 1 This is a diagram used to illustrate the wireless communication system in this embodiment.

[0016] Figure 2 This is a diagram illustrating an example of the functional structure of a base station in this embodiment.

[0017] Figure 3 This is a diagram illustrating an example of the functional structure of the terminal in this embodiment.

[0018] Figure 4 This is a diagram illustrating an example of the functional structure of the RIS in this embodiment.

[0019] Figure 5 This is a diagram illustrating an example of the operation of the RIS in this embodiment.

[0020] Figure 6 This is a diagram illustrating an example of communication in the high-frequency band.

[0021] Figure 7 This is a diagram illustrating an example of a reflective RIS according to this embodiment.

[0022] Figure 8 This is a diagram illustrating an example of a transmissive RIS according to this embodiment.

[0023] Figure 9 This diagram illustrates an example of a wireless communication system for location positioning, including a base station and a terminal.

[0024] Figure 10This diagram illustrates an example of a wireless communication system that performs location positioning, including a base station, a terminal, and a RIS.

[0025] Figure 11 This is a diagram illustrating a hypothetical example of the reference point and reflection point of the RIS in the first embodiment.

[0026] Figure 12 This is a diagram illustrating a hypothetical example of the offset of the reflection point of the RIS in the first embodiment.

[0027] Figure 13 This is a diagram illustrating an example of the method for determining the reflection point of the RIS in the second embodiment.

[0028] Figure 14 This is a diagram illustrating an example of the relationship between the RIS spot ID and the RIS spot reference point in the second embodiment.

[0029] Figure 15 This is a diagram illustrating an example of the relationship between the RIS beam point ID, the RIS reference point, and the RIS beam point offset in the second embodiment.

[0030] Figure 16 This is a diagram illustrating an example of the reflected beam range of the RIS in the downlink signal of the third embodiment.

[0031] Figure 17 This is a diagram illustrating an example of a method for defining the scope of RIS in the third embodiment.

[0032] Figure 18 This is a diagram illustrating an example of defining the reflected beam range of the RIS in the first example of the third embodiment.

[0033] Figure 19 This is a diagram illustrating an example of defining the reflected beam range of the RIS in the second example of the third embodiment.

[0034] Figure 20 This is a diagram illustrating an example of defining the reflected beam range of the RIS in the third example of the third embodiment.

[0035] Figure 21 This is a diagram illustrating an example of the reflection angle at the reflection point of the defined RIS in the third embodiment.

[0036] Figure 22 This is a diagram illustrating an example of the hardware structure of a base station, terminal, or RIS in this embodiment.

[0037] Figure 23 This is a diagram illustrating an example of the structure of the vehicle in this embodiment. Detailed Implementation

[0038] Hereinafter, this embodiment will be described with reference to the accompanying drawings. Furthermore, the embodiment described below is merely an example, and the application of this invention is not limited to the following embodiments.

[0039] In the operation of the wireless communication system of this embodiment, existing technologies are appropriately used. These existing technologies include, for example, existing LTE, but are not limited to, existing LTE. Furthermore, unless otherwise stated, the term "LTE" as used in this specification has a broad meaning that includes LTE-Advanced and subsequent methods (e.g., NR).

[0040] Furthermore, in the embodiments described below, the existing LTE terms such as SS (Synchronization Signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel) are used. These are for ease of description, and the same signals and functions may also be referred to by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used for NR are not necessarily explicitly written as "NR-".

[0041] Furthermore, in this embodiment, the duplex mode can be TDD (Time Division Duplex), FDD (Frequency Division Duplex), or other modes (e.g., Flexible Duplex).

[0042] Furthermore, in this embodiment, the "configure" wireless parameters can be pre-configured predetermined values, or wireless parameters notified from base station 10 or terminal 20.

[0043] Figure 1 This is a diagram used to illustrate the wireless communication system in this embodiment. (Example) Figure 1 As shown, the wireless communication system in this embodiment includes a base station 10 and a terminal 20. There can be multiple base stations 10 and multiple terminals 20.

[0044] Base station 10 is a communication device that provides one or more cells and communicates wirelessly with terminal 20. The physical resources of the wireless signal are defined in the time and frequency domains. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or resource blocks. Furthermore, the TTI (Transmission Time Interval) in the time domain can be a time slot or a sub-time slot, and the TTI can be a subframe.

[0045] Base station 10 is capable of carrier aggregation, which bundles multiple cells (multiple CCs, or component carriers) to communicate with terminal 20. In carrier aggregation, one primary cell (PCell) and one or more secondary cells (SCell) are used.

[0046] Base station 10 sends synchronization signals and system information to terminal 20. Synchronization signals may be, for example, NR-PSS and NR-SSS. System information is transmitted via, for example, NR-PBCH or PDSCH, also known as broadcast information. Figure 1 As shown, base station 10 sends control signals or data to terminal 20 via DL (Downlink) and receives control signals or data from terminal 20 via UL (Uplink). Additionally, here, the content sent via control channels such as PUCCH and PDCCH is referred to as control signals, and the content sent via shared channels such as PUSCH and PDSCH is referred to as data; however, this terminology is only used as an example.

[0047] Terminal 20 is a communication device with wireless communication capabilities, such as a smartphone, mobile phone, tablet computer, wearable terminal, or M2M (Machine-to-Machine) communication module. Figure 1As shown, terminal 20 receives control signals or data from base station 10 via DL, and sends control signals or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Alternatively, terminal 20 can be referred to as UE, and base station 10 can be referred to as gNB or TRP (Transmission and Reception Point).

[0048] Terminal 20 is capable of carrier aggregation to communicate with base station 10 by bundling multiple cells (multiple CCs). In carrier aggregation, one primary cell and one or more secondary cells are used. Alternatively, a PUCCH-SCell with a PUCCH can also be used.

[0049] Furthermore, in the wireless communication system of this embodiment, as an example, base station 10 is a wireless base station operating on 5G or 6G, forming a cell. Moreover, the cell is a relatively large cell, referred to as a macro cell.

[0050] Base stations 10A through 10D are base stations operating according to 5G or 6G standards. Base stations 10A through 10D respectively form cells CA through D, which are smaller than macro cells. Cells A through D can also be referred to as small cells or macro cells, etc. Figure 1 As shown, cells A through D can also be included within a macrocell.

[0051] A macro cell can generally be defined as a communication-enabled area with a radius of several hundred meters to tens of kilometers covered by a single base station. Conversely, a small cell can be a general term for cells with low transmission power and smaller coverage areas than macro cells.

[0052] Furthermore, base station 10 and base stations 0A-10D can also be referred to as gNodeB (gNB) or BS (BaseStation), etc. Additionally, terminal 20 can also be referred to as UE or MS, etc. Furthermore, the specific structure of the wireless communication system, including the number or types of base stations and terminals, is not limited to... Figure 1 The example shown.

[0053] Furthermore, wireless communication systems are not necessarily limited to those that follow 5G or 6G standards. For example, a wireless communication system could also be a next-generation 6G wireless communication system or a wireless communication system that follows LTE standards.

[0054] As an example, base station 10 and base stations 10A-10D, along with terminal 20, perform wireless communication following 5G or 6G principles. Base station 10 and base stations 10A-10D, as well as terminal 20, can also support Massive MIMO (MIMO) which generates more directional beams by controlling wireless signals transmitted from multiple antenna elements; Carrier aggregation (CA) which uses multiple component carriers (CCs) together; Dual connectivity (DC) which allows simultaneous communication between terminal 20 and two NG-RAN nodes; and IAB (Integrated Access and Backhaul) which integrates wireless backhaul between wireless communication nodes such as gNBs with wireless access to terminal 20.

[0055] Furthermore, wireless communication systems can also support higher frequency bands than the frequency ranges (FRs) specified in 3GPP Release 15. For example, FR1 can support 410 MHz-7.125 GHz, and FR2 can support 24.25 GHz-52.6 GHz. Moreover, wireless communication systems can also support frequency bands exceeding 52.6 GHz up to 114.25 GHz. This frequency band can also be referred to as the millimeter-wave band.

[0056] Here, the base station 10 supporting massive MIMO can transmit a beam. Massive MIMO generally means MIMO communication using an antenna with more than 100 antenna elements, enabling higher-speed wireless communication than ever before through the multiplexing effect of multiple streams. Furthermore, it allows for highly precise beamforming. The beamwidth can be dynamically changed according to the frequency band used or the state of the terminal 20. Additionally, the received signal power can be increased by using the beamforming gain provided by a narrow beam. Consequently, effects such as reduced interference and efficient utilization of wireless resources can be expected.

[0057] The wireless communication system may include a RIS (Reconfigurable Intelligent Surface) 30. In this embodiment, the RIS 30 is an example of a wireless relay device. The wireless relay device may also be a reflector, a metamaterial functional device, a battery-less device, a phase-controlled reflector, a passive repeater, an IRS (Intelligent Reflecting Surface), a Smart Repeater, or a Network Controlled Repeater. As a specific example of a reflector (RIS), it may also be a reflector referred to as a metamaterial reflector, a dynamic metasurface, a metasurface lens, etc. (e.g., Non-Patent Document 2).

[0058] In this embodiment, the RIS30 relays, for example, wireless signals transmitted from base station 10A. In this description, "relay" can refer to at least one of "reflection," "transmission," "convergence (focusing radio waves to approximately one point)," and "diffraction." Terminal 20 can receive wireless signals relayed by the RIS30. Furthermore, the RIS30 can relay wireless signals transmitted from terminal 20, or it can relay wireless signals transmitted from base station 10.

[0059] As an example, the RIS30 can change the phase of the wireless signal to be relayed to the terminal 20. From this point of view, the RIS30 can be referred to as a phase-variable reflector. In this embodiment, the RIS30 is sometimes configured to have the function of relaying by changing the phase of the wireless signal, but it is not limited thereto. In addition, the RIS30 can be referred to as a RIS, a repeater, a relay device, a reflect array, a transmit array, etc.

[0060] Furthermore, in this embodiment, RIS30 can be defined as having the functions shown in 1) to 5).

[0061] 1) It can have the function of receiving signals transmitted from base station 10. This signal can be a DL signal, SSB (SS / PBCH block), PDCCH, PDSCH, DM-RS (Demodulation Reference Signal), PT-RS (Phase Tracking Reference Signal), CSI-RS (Channel Status Information Reference Signal), RIS dedicated signal, etc. It can also have the function of receiving signals carrying information from metamaterial functions. Additionally, it can also have the function of transmitting this signal to terminal 20.

[0062] 2) It can have the function of sending signals to base station 10. This signal can be a UL signal, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signal, etc. It can also have the function of sending information within the metamaterial function. Additionally, it can also have the function of receiving this signal from terminal 20.

[0063] 3) It can also have frame synchronization function with base station 10. In addition, it can also have frame synchronization function with terminal 20.

[0064] 4) It may also have the function of reflecting signals transmitted from base station 10 or terminal 20. For example, the reflection function may be a function in phase change, a function in beam control (e.g., TCI (Transmission Configuration Indication)-state, QCL (Quasi Co Location) control function, beam selection application, spatial filter / precoding weight selection application).

[0065] 5) It may also have a power conversion function for signals transmitted from base station 10 or terminal 20. For example, this power conversion function may also be a power amplification function.

[0066] Additionally, "receive and transmit" or "relay" in RIS30, such as RIS or smart repeater, can also mean performing the following function A, but not performing the following function B while being transmitted.

[0067] Function A: Apply phase shifter.

[0068] Function B: Without compensation circuitry (e.g., amplification, filtering).

[0069] As other examples Function A: Apply phase shifters and compensation circuits.

[0070] Function B: Without frequency conversion.

[0071] In RIS30, the amplitude can be amplified when the phase changes. Furthermore, a "relay" in RIS30 can refer to transmitting a received signal as is without performing layer 2 or layer 3 processing, transmitting a signal received at the physical layer level as is, or transmitting a received signal as is without interpreting the signal (in which case phase changes, amplitude amplification, etc., can be performed).

[0072] (Device structure)

[0073] Next, an example of the functional structure of the base station 10, terminal 20, and RIS30 that perform the processing and actions in this embodiment will be described. The base station 10, terminal 20, and RIS30 include the functions to perform the embodiments described later. However, each of the base station 10, terminal 20, and RIS30 may also possess only any one of the functions described in the embodiment.

[0074] <Base Station 10>

[0075] Figure 2 This diagram illustrates an example of the functional structure of a base station in this embodiment. (As shown...) Figure 2 As shown, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130 and a control unit 140. Figure 2 The functional structure shown is only one example. The functional divisions and names of the functional units can be arbitrary, as long as the operations described in this embodiment can be performed. The transmitting unit 110 and the receiving unit 120 can also be referred to as communication units.

[0076] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and wirelessly transmitting the signal. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher-level information from the received signals. Furthermore, the transmitting unit 110 has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc., to the terminal 20. In addition, the transmitting unit 110 transmits setting information, etc., as described in the embodiment.

[0077] The setting unit 130 stores pre-set setting information and various setting information sent to the terminal 20 into a storage device, and reads it from the storage device as needed. The control unit 140 performs, for example, resource allocation and overall control of the base station 10. Alternatively, the signal transmission-related functions of the control unit 140 may be included in the transmitting unit 110, and the signal reception-related functions of the control unit 140 may be included in the receiving unit 120. Furthermore, the transmitting unit 110 and the receiving unit 120 may be referred to as a transmitter and a receiver, respectively.

[0078] Terminal 20

[0079] Figure 3 This diagram illustrates an example of the functional structure of the terminal in this embodiment. (As shown...) Figure 3 As shown, the terminal 20 includes a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. Figure 3 The functional structure shown is only one example. The functional distinctions and names of the functional units can be arbitrary, as long as the operations described in this embodiment can be performed. The transmitting unit 210 and the receiving unit 220 can also be referred to as communication units.

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

[0081] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 into a storage device, and reads it from the storage device as needed. In addition, the setting unit 230 also stores pre-set setting information. The control unit 240 performs overall control of the terminal 20. Alternatively, the signal transmission-related functions of the control unit 240 can be included in the transmitting unit 210, and the signal reception-related functions of the control unit 240 can be included in the receiving unit 220. Alternatively, the transmitting unit 210 and the receiving unit 220 can be referred to as a transmitter and a receiver, respectively.

[0082] <ris30>

[0083] Figure 4 This is a diagram illustrating an example of the functional structure in this embodiment. (As shown...) Figure 4 As shown, the RIS30 includes a transmitting unit 310, a receiving unit 320, a control unit 330, a variable unit 340, and an antenna unit 350. The functional divisions and names of the functional units can be arbitrary, as long as the operations of this embodiment can be performed. The transmitting unit 310 and the receiving unit 320 can also be referred to as communication units.

[0084] The antenna section 350 includes at least one antenna connected to the variable section 340. For example, the antenna section 350 may also be configured as an array antenna. In this embodiment, the antenna section 350 is sometimes specifically referred to as a repeater antenna. Furthermore, the variable section 340 and the antenna section 350 may also be referred to as a repeater section.

[0085] The variable section 340 is connected to the antenna section 350, enabling changes in phase, load, amplitude, etc. For example, the variable section 340 can also be a variable phase device, phase shifter, amplifier, etc. For example, by changing the phase of the radio wave arriving at the repeater antenna from the radio wave generator, the direction or beam of the radio wave can be changed.

[0086] The control unit 330 is a control unit that controls the variable unit 340. In this embodiment, the control unit 330 functions as a control unit that controls the relay state when relaying without interpreting the radio waves from the base station 10 or the terminal 20. Here, the control unit 330 can change the relay state based on control information received from the base station 10 or the terminal 20 via the communication unit, or it can change the relay state based on the reception state of the radio waves from the base station 10 or the terminal 20. For example, the control unit 330 can select appropriate receiving beams and transmitting beams (directions) based on control information such as SSB, and control the variable unit 340. Similarly, the control unit 330 can also select appropriate combinations of receiving and transmitting directions based on the reception state, such as reception quality or maximum received power, and control the variable unit 340.

[0087] Furthermore, in this embodiment, the control unit 330 can, for example, control the variable unit 340 based on information related to the propagation path between the terminal 20 or base station 10A and the antenna unit 350 (including information estimated based on the reception state and control information, the same below). For example, the control unit 330 can use known methods such as an active repeater or RIS to change the phase of the radio waves received from the base station 10A without using transmission power, thereby relaying to a specific direction such as the radio wave receiving destination (in this case, the terminal 20). Specifically, the control unit 330 controls the phase of the wireless signal based on the estimated propagation path information HPT and HRP to relay to the terminal 20 or base station 10A. That is, by changing the phase of the array antenna, etc., according to the same principle as beamforming, it is possible to relay radio waves in a specific direction. In addition, the RIS30 can control (change) only the phase of the wireless signal (radio wave) through the control unit 330, and can perform relaying without power supply, without amplifying the power of the wireless signal to be relayed.

[0088] In addition, in this embodiment, the control unit 330 can also acquire information based on the reception status. Furthermore, the receiving unit 320 can acquire control information from the base station 10A or the terminal 20. For example, the receiving unit 320 can receive various signals such as SSB (including the various signals exemplified in the above functions) transmitted from the base station 10A or the terminal 20 as control information.

[0089] Furthermore, the control unit 330 can also estimate the propagation path information (HPT and HRP) between the radio wave generating source (e.g., base station 10A or terminal 20) and the antenna unit 350 based on the receiving state (e.g., changes in received power) during the control of the variable unit 340.

[0090] Specifically, the propagation path information (propagation channel information) related to each propagation path is information such as amplitude or phase. In this embodiment, it is information estimated about the propagation path of the radio wave reaching the antenna section 350. As an example, the control unit 330 can also estimate the propagation path information of the antenna section 350 based on the change in received power when the phase of the variable unit 340 is switched to quadrature by the array-shaped antenna section 350, following the same principle as I / Q (In-phase / Quadrature) detection.

[0091] Figure 5 This is a diagram illustrating an example of the operation of the RIS30 in this embodiment. Figure 5 As shown, RIS30 is located between base station 10A (which may be another base station 10, etc.) and terminal 20, and relays (reflects, transmits, gathers, diffracts, etc.) the wireless signals transmitted and received between base station 10A and terminal 20.

[0092] As a specific example, when the wireless quality is good, base station 10A and terminal 20 directly transmit and receive wireless signals without going through RIS30. On the other hand, when there are obstructions or other factors between base station 10A and terminal 20, and the wireless quality deteriorates, RIS30 relays the wireless signals transmitted and received between base station 10A and terminal 20.

[0093] Specifically, the RIS30 estimates the propagation path information HPT and HRT between the radio wave generator of the base station 10A or terminal 20 and the relay antenna based on the change in received power when controlling the variable part 340 of the variable phase shifter, and controls the variable part 340 of the variable phase shifter, etc., based on the estimated propagation path information, thereby relaying the wireless signal to the radio wave receiving destination of the terminal 20, etc. Furthermore, not limited to estimating the propagation path information HPT and HRT, the RIS30 can also relay the wireless signal to the radio wave receiving destination of the base station 10A or terminal 20, etc., by controlling the variable part 340 of the variable phase shifter, etc., based on control information received from the base station 10A or terminal 20.

[0094] Here, the propagation path or propagation channel refers to the various communication paths in wireless communication, specifically the communication paths between various transmitting and receiving antennas (such as the base station antenna and terminal antenna in the figure).

[0095] As an example, the RIS30 includes: an antenna section 350 having a small multi-element antenna that supports massive MIMO; and a variable section 340 having a variable phaser or phase shifter that changes the phase of the wireless signal, which is essentially a radio wave, to a specific phase. The RIS30 uses the variable section 340 to control the phase of the radio wave relayed to the terminal 20 or the base station 10A.

[0096] Figure 6 This is a diagram illustrating an example of communication in the high-frequency band. (Example:) Figure 6 As shown, when using high-frequency bands ranging from several GHz to tens of GHz and above, blind spots are easily generated due to the strong linearity of radio waves. When there is a line-of-sight relationship between base station 10A and terminal 20, wireless communication between them will not be affected even when using this high-frequency band. On the other hand, for example, when the line of sight between base station 10A and terminal 20 is obstructed by buildings or trees, the wireless quality deteriorates significantly. That is, when terminal 20 moves into a blind spot obstructed by an obstruction, communication may be interrupted.

[0097] When considering applications that effectively utilize high speed, high capacity, and low latency (such as remote operation), it is important to eliminate blind spots and ensure the connection between the base station and the terminal so that communication within the wireless communication system is uninterrupted.

[0098] Therefore, technologies have been developed to relay radio waves between base station 10A and terminal 20, such as radio wave propagation control devices like RIS or smart repeaters. By controlling the propagation characteristics of base station signals, communication characteristics can be improved, expanding coverage without the need for a signal source, and reducing setup and operating costs associated with adding base stations.

[0099] In conventional radio wave propagation control devices, there are passive and active types. While passive types have the advantage of not requiring control information, they cannot follow moving objects or environmental changes. On the other hand, active types have the disadvantage of requiring control information and increasing overhead, but they can variably control the propagation characteristics of radio waves by changing the load (phase) state of the control antenna, and can also follow moving objects and environmental changes.

[0100] Active radio wave propagation control devices and methods fall into two categories: feedback (FB) specifications and propagation path information specifications. In the FB specification, the variable radio wave propagation control device uses feedback from terminals such as 20 to determine the communication state when the load (phase) state changes randomly, searching for optimal conditions. On the other hand, in the propagation path information specification, the load state is determined based on the propagation path information between the base station and the radio wave propagation control device, enabling optimal radio wave propagation control. In this embodiment, both types can be applied.

[0101] Furthermore, as relay methods, there are types such as reflection, transmission, diffraction, and convergence. However, in this embodiment, as an example, the structural examples of the reflection type and the transmission type will be described below (for the diffraction type and the convergence type, refer to Non-Patent Literature 2, etc.).

[0102] Figure 7 This is a diagram illustrating an example of a reflective RIS in this embodiment. Using Figure 7 This illustrates an example of a system architecture for a reflective RIS30. Figure 7 This is a diagram showing the relationship between the transmitting antenna Tx of base station 10A, the relay antenna Sx of the transmissive RIS30, and the receiving antenna Rx of terminal 20, etc. (See diagram for example.) Figure 7 As shown, in this embodiment, taking MIMO as an example, there are multiple propagation paths between Tx and Sx and multiple propagation paths between Sx and Rx. The RIS30 controls the variable part 340, such as the variable phase shifter with the relay antenna Sx, to relay the radio waves.

[0103] like Figure 7 As shown, in the case of a reflective relay, the array of relay antennas is configured to face the same direction. Therefore, the propagation path of the relay antenna can be estimated based on the observed reception state when the phase conditions of the relay antenna are varied multiple times.

[0104] Figure 8 This is a diagram illustrating an example of a transmissive RIS in this embodiment. Using Figure 8 This illustrates an example of the system architecture of a transmissive RIS30. Figure 8 This is a diagram showing the relationship between the transmitting antenna Tx of base station 10A, the relay antenna Sx of the transmissive RIS30, and the receiving antenna Rx of terminal 20, etc. (See diagram for example.) Figure 8 As shown, in this embodiment, taking MIMO as an example, there are multiple propagation paths between Tx and Sx, and multiple propagation paths between Sx and Rx. As shown, RIS30 relays radio waves arriving from one side to the other via a variable part 340 such as a variable phase shifter of the relay antenna Sx. Thus, in the case of the transmission type, the reference antenna on the left side of the figure and the relay antenna on the right side are arranged in pairs and facing opposite directions to enable the relay of radio waves arriving from one side to the other. Whether it is the transmission type or the reflection type, it is configured to be able to measure the reception state by detecting the power arriving at the relay antenna using a power detector or the like. In addition, the propagation path of the relay antenna can be estimated based on the received signal observed when the phase conditions of the relay antenna change multiple times.

[0105] For example, future networks like 6G require even higher quality than 5G. This includes ultra-high speeds at tera-bps levels and high reliability and low latency comparable to optical communication. To achieve this quality, very high frequencies, such as terahertz waves, are envisioned. However, using such high frequencies presents advantages such as high speeds due to ultra-wideband and low latency due to shorter symbol lengths. On the other hand, disadvantages include narrow coverage due to higher attenuation rates and reduced reliability due to higher straight-through rates. For locations requiring 6G communication, research is needed on how to ensure redundancy, i.e., how to increase the number of communication transmission points.

[0106] As described above, the RIS30 reflects or transmits the beam transmitted from the base station 10 or the terminal 20 in a predetermined direction and transmits it to the terminal 20 or the base station 10. The RIS30 can be, for example, a passive RIS or an active RIS. A passive RIS is a device that controls the change of reflection angle or beamwidth based on the location of the mobile station, and does not require control information; however, it is difficult to perform precise beam control. An active RIS is a device that controls the change of reflection angle and beamwidth based on the location of the mobile station, and can perform precise beam control; however, it requires control information, thus increasing overhead. Using the RIS30 can increase the number of communication transmission points.

[0107] RIS30 may be a device with a predetermined function, which may be at least one of functions 1) and 2) shown below.

[0108] 1) UE Function

[0109] RIS30 may be capable of receiving signals transmitted from base station 10 (e.g., DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, and RIS-specific signals). RIS30 can receive information from the metamaterial function described in section 2) through this receiving function.

[0110] The RIS30 may have the function of transmitting signals to the base station 10 (e.g., UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, and RIS-specific signals). The RIS30 can transmit information from the metamaterial function described in section 2) below through this transmission function. Furthermore, the RIS30 may have a frame synchronization function with the base station 10.

[0111] 2) Metamaterial Functions

[0112] The RIS30 may have the function of reflecting signals transmitted from the base station 10 or the terminal 20 (e.g., phase change). The RIS30 may reflect signals by changing the phase of each of the multiple reflective elements it has, or it may reflect signals by performing a common phase change in multiple reflective elements.

[0113] Furthermore, the RIS30 may have beam control functions (e.g., TCI-state, QCL control functions, beam selection applications, spatial filter / precoding weight selection applications). The RIS30 may have the function of changing the power of the signal transmitted from the base station 10 or the terminal 20 (e.g., power amplification). The RIS30 may perform different power changes for each reflective element it has, or it may perform common power changes for multiple reflective elements.

[0114] In RIS30, "receive and transmit" can refer to reflecting radio waves / signals. The terms "base station" and "terminal" are used below, but are not limited to these and can also be replaced with communication devices.

[0115] In next-generation networks (e.g., 6G), scenarios are being explored that utilize wireless relay devices (e.g., RIS) to extend coverage. Figure 9 An example of a wireless communication system including a base station 10 and a terminal 20 for performing NR positioning is shown. Figure 9 In the wireless communication system, terminal 20 receives a downlink positioning reference signal (PRS) from base station 10 for downlink positioning (DLpositioning). For uplink positioning, terminal 20 sends a positioning SRS (SRS forpositioning) to base station 10. The positioning SRS can also be referred to as SRS-pos.

[0116] Figure 10 An example of a wireless communication system performing NR location positioning, including base station 10, terminal 20, and RIS30, is shown. Figure 10 In the example, terminal 20 receives DL-PRS from base station 10 via RIS30 and sends SRS for positioning to base station 10 via RIS30.

[0117] In NR positioning, the time difference of arrival and angle of arrival of the signals between base station 10 and terminal 20 are used. Therefore, in situations such as Figure 10 In the wireless communication system shown, when signals transmitted and received between base station 10 and terminal 20 pass through RIS30, location positioning may not be properly performed. For example, in scenarios requiring centimeter-level high-precision location positioning, it is necessary to reduce the measurement error of location positioning.

[0118] According to this embodiment, measurement errors in positioning using the RIS30 are reduced, and high-precision positioning using the RIS30 is achieved. This embodiment provides a method for appropriately estimating the reflection point of a signal (e.g., PRS) on the RIS30. The methods in the embodiments described below in 1-4 can be performed independently or in combination.

[0119] (First Implementation)

[0120] According to the first embodiment, terminal 20 may also be provided with reflection point information associated with the reflection point on RIS30.

[0121] For example, terminal 20 may also be configured with a reflection point associated with a DL-PRS / SRS-pos resource (set) ID. The information associated with the reflection point may be associated with, for example, a beam ID, panel ID, or RIS ID.

[0122] For example, terminal 20 may also be designed to notify at least one of the following via auxiliary data: RIS reference point (e.g., [latitude, longitude, altitude]), RIS horizontal and vertical tilt angle (e.g., [degree]), or the offset between the RIS reference point and the reflection point.

[0123] Figure 11 This illustrates a hypothetical example of the RIS reference point and reflection point. For example... Figure 11 As shown, for example, the reflection point can be determined based on the offset value from the RIS reference point.

[0124] For example, the offset of a reference point can be defined by distance units such as [m] or [cm]. The offset of a reference point can include a horizontal offset and a vertical offset. Figure 12 As shown on the left, the reflection point can also be determined based on the horizontal and vertical offset values ​​from the reference point.

[0125] For example, the offset of a reference point can be defined by distance units such as [m] or [cm] and angle units such as [degree]. The offset of a reference point can include the radius from the reference point and the angle from the baseline passing through the reference point. Figure 12 As shown on the right, the reflection point can also be determined based on the offset of the radius from the reference point and the offset of the angle from the baseline passing through the reference point.

[0126] In the first embodiment, terminal 20 may also request notifications and updates of RIS reflection point information from the network (e.g., base station 10).

[0127] According to the first embodiment, when the RIS30 has a reflection point estimation function, the coordinates (position) of the reflection point of the RIS30 can be dynamically obtained based on the reflected beam while suppressing the complexity of the base station 10 and the terminal 20. As a result, the method according to the first embodiment can improve the accuracy of location positioning via the RIS30.

[0128] (Second Implementation)

[0129] According to the second embodiment, the terminal 20 determines the RIS reflection point by measuring / transmitting PRS.

[0130] For example, terminal 20 can also be conceived as having RIS valid region information, representing the RIS valid region, communicated to the terminal 20, and the network configured to repeatedly measure the same DL-PRS resource (set) ID. The RIS valid region is, for example, a predetermined area where the signal is reflected on RIS 30.

[0131] For example, terminal 20 can also be conceived as having RIS valid area information notified to terminal 20, and the network configured to repeatedly send the same SRS-pos resource (set) ID.

[0132] RIS valid region information may include, for example, the RIS spot ID. Figure 13 As shown, the RIS beampoint is a beampoint that divides the surface of the RIS30. The RIS beampoint ID is an ID that identifies each beampoint. For example, by switching the RIS beampoint during repeated measurements of the same DL-PRS resource (set) by terminal 20, terminal 20 can determine the optimal RIS beampoint (i.e., the RIS reflection point). For example, terminal 20 can also determine the beampoint with the best measurement results and quality (e.g., the highest received power (RSRP)) as the RIS reflection point.

[0133] RIS beam points can also be called RIS panels or RIS blocks. RIS beam points can also be represented as coordinates.

[0134] Terminal 20 determines the effective region of RIS based on the received RIS effective region information.

[0135] RIS valid region information may include, for example, information representing the RIS beampoint ID and the RIS beampoint reference point. For example... Figure 14 As shown, the effective region of RIS can be determined based on the reference point and RIS beam point ID of the RIS beam point.

[0136] RIS effective region information may include, for example, the RIS beam point ID, the reference point of the RIS beam point, and the offset between the reference point and the RIS beam point (i.e., the reflection point). Figure 15 As shown, the effective area of ​​RIS can be determined based on the reference point of the RIS beam point, the RIS beam point offset value, and the RIS beam point ID.

[0137] According to the second embodiment, even if the RIS30 does not have a reflection point estimation function, the coordinates of the RIS reflection point can still be obtained, thereby improving the accuracy of the location via the RIS.

[0138] (Third implementation method)

[0139] According to the third embodiment, terminal 20 can determine the reflection beam range of RIS30 based on PRS measurement and / or PRS transmission.

[0140] The RIS30's reflected beam range is the range of beams that can be reflected from the RIS30. Figure 16 An example of the range at which DL-PRS transmitted from base station 10 is reflected by RIS30 is shown. Figure 16 In the example, the reflected beam range of RIS30 extends from the DL-PRS transmitted from base station 10 to one end of the surface of RIS30 to the DL-PRS transmitted from base station 10 to the other end of the surface of RIS30. In this embodiment, the reflected beam range is not limited to... Figure 16 An example could be a predetermined range that the RIS30 can reflect. The reflected beam range of the RIS30 in the uplink signal (e.g., the SRS for location positioning) is, for example, the range of the SRS for location positioning transmitted from the terminal 20 to a part of the surface of the RIS30 (e.g., one end) to the SRS for location positioning transmitted from the terminal 20 to another part of the surface of the RIS30 (e.g., the other end).

[0141] The reflected beam range of the RIS30 can be defined by the beam angle that can be reflected on the RIS30.

[0142] For example, terminal 20 may envision determining the reflected beam range of RIS30 based on DL-PRS beam scanning. Terminal 20 may perform DL-PRS measurements on the DL-PRS transmitted via DL-PRS beam scanning and determine the reflected beam range based on the measurement results. The DL-PRS measurement results may include, for example, the RSRP and / or LOS (Line-Of-Sight) / NLOS (Non-LOS) probabilities of the DL-PRS.

[0143] For example, terminal 20 may also be designed to determine the reflected beam range of RIS30 based on SRS-pos beam scanning (SRS-pos transmission).

[0144] For example, terminal 20 may also be designed to notify the network (e.g., base station 10) of RIS information used to determine the range of the reflected beam via auxiliary data.

[0145] For example, RIS information may include information defining the extent of RIS30. Information defining the extent of RIS30 may include, for example, the horizontal and vertical distances of the RIS30's surface. The horizontal and vertical distances of the RIS30's surface are expressed in units of distance (e.g., [m] and [cm]).

[0146] For example, such as Figure 17 As shown, in addition to the horizontal and vertical distances from the surface of the RIS30, the information defining the extent of the RIS30 may also include information representing a reference point on the surface of the RIS30. For example, the horizontal and vertical distances from the surface of the RIS30 can be represented as distances from a reference point.

[0147] Information defining the extent of RIS30 can be, for example, the coordinates defining the surface of RIS30. These coordinates can be the coordinates of the top, bottom, left, and right edges of the RIS30 surface, or they can be coordinates representing a predetermined position on the surface defining RIS30. Coordinates can also be represented by latitude, longitude, and altitude.

[0148] For example, RIS information may include information representing the reference point and reflected beam range of the RIS30. The reflected beam range may be defined by an angle and / or a DL-PRS / SRS-pos resource (set) ID. The DL-PRS / SRS-pos resource (set) ID may be a beam ID.

[0149] As a first example, the reflected beam range of RIS30 can be defined by the angular width of the angle of departure (Angle of Departure (AoD)) or angle of arrival (AoA) in base station 10 or terminal 20.

[0150] In the first example of defining the reflected beam range, the reflected beam range of the downlink RIS30 can be defined by the angular width of the departure angle in the base station 10 or the arrival angle in the terminal 20. Figure 18 An example is shown where the reflected beam range of the RIS30 in the downlink is defined by the difference between the departure angles Da1 and Da2 in the base station 10. The reference direction of the departure angle can be uniquely defined by an orientation such as "north" or "south", or it can be defined as an inherent direction for each base station 10.

[0151] In the first example, the reflected beam range of the uplink RIS30 can be defined by the angle width of the angle of arrival in the base station 10 or the angle of departure in the terminal 20.

[0152] As a variation of the first example, the reflected beam range of the RIS30 can be defined by the width of the angle at which downlink signals (e.g., DL-PRS) or uplink signals (e.g., SRS-pos) in the RIS30 are reflected.

[0153] As a second example of defining the reflected beam range, the reflected beam range of the RIS30 can be defined based on the DL-PRS / SRS-pos resource ID. Figure 19 An example is shown where the reflected beam range of the RIS30 is defined by DL-PRS resource #2 and DL-PRS resource #6.

[0154] As a third example of defining the reflected beam range, the reflected beam range of the RIS30 can be defined based on a reference point and the DL-PRS / SRS-pos resource ID. In this third example, the reflected beam range of the RIS30 is defined as the angle relative to the DL-PRS / SRS-pos resource ID associated with the reference point. Figure 20 In the example, the reflected beam range of the RIS30 is determined by the range of angle Db1 [degree] relative to DL-PRS resource #4 associated with the reference point and the range of angle Db2 [degree] relative to DL-PRS resource #4.

[0155] In the third embodiment, the RIS transit probability can also be determined based on the PRS measurement results. The RIS transit probability is the probability of transmitting or receiving signals via the RIS30 during communication between the base station 10 and the terminal 20.

[0156] The measurement result of PRS can be, for example, RSRP, or the LOS / NLOS indicator. A value of "0" for the LOS / NLOS indicator indicates LOS, and a value of "1" indicates NLOS. Conversely, a value of "1" indicates LOS, and a value of "0" indicates NLOS.

[0157] The probability of RIS can also be defined as a RIS indicator. The RIS indicator can be sent from terminal 20 to the network (e.g., base station 10) or from the network to terminal 20. The RIS indicator can be a hard value (e.g., represented by 1 bit) of 0-1, or a soft value of 0-100%. When the RIS indicator is represented as a soft value, the soft value can be set in units of 1% or in units of X% (X is a pre-defined value). For example, when X = 10, 0-100% can also be represented by 11 values ​​(4 bits): 0, 0.1, 0.2, 0.3, ..., 0.9, 1.

[0158] For example, terminal 20 can report the determined beam angle to the network.

[0159] For example, terminal 20 can estimate the reflection angle at the reflection point of RIS30 and report the estimated reflection angle to the network. The reflection angle at the reflection point of RIS30 can be defined with reference to the horizontal axis of RIS30, such as... Figure 21 Opt.1, or it can be defined based on the vertical axis of the RIS30, such as... Figure 21 Opt. 2. The horizontal axis of the RIS30 is the axis parallel to the reflective surface of the RIS30. The vertical axis of the RIS30 is the axis perpendicular to the reflective surface of the RIS30.

[0160] According to the third embodiment, the installation location and setting flexibility of the RIS can be improved, and the location can be located via the RIS in various scenarios.

[0161] (Fourth Implementation)

[0162] According to the fourth embodiment, terminal 20 can report terminal capability information (UEcapability) related to the reflection point of RIS to the network.

[0163] For example, the capability information of terminal 20 includes the following information.

[0164] 1) Information indicating whether RIS reflection point information is supported for notification from the network to terminal 20.

[0165] 2) Information indicating whether the function of determining the RIS reflection point based on PRS measurement / transmission is supported.

[0166] 3) Information indicating whether the function supports determining whether communication is via RIS based on PRS measurement results.

[0167] 4) Information indicating whether RIS indicator is supported.

[0168] Information supporting RIS reflection point information can be represented by each terminal 20 (UE), each FR (Frequency Range), each location positioning method (e.g., TDOA, Multi-RTT), and each frequency band combination (e.g., intra-band (contiguous) / intra-band (non-contiguous) / inter-band).

[0169] Information indicating support for the RIS indicator can indicate support for either a hard value of 0-1 (e.g., 1 bit) or a soft value of 0-100%.

[0170] According to the fourth embodiment, it is possible to estimate the reflection point of the RIS corresponding to the terminal capability.

[0171] The methods described in the above embodiments are not limited to location positioning using RIS; for example, they can also be applied to location positioning using repeaters.

[0172] The PRS in the above embodiments can also be a specific RS that can be used for location positioning. For example, if a common RS that can also be used for location positioning is standardized in future wireless communication specifications, this embodiment can also be applied to that RS.

[0173] In the above embodiments, the terminal may also be referred to as user equipment (UE), user terminal (UT), node, or user node.

[0174] In the various embodiments described above, the reference point may be referred to as the RIS position, RIS coordinates, or RIS reference point.

[0175] In the above embodiments, the reflection point can also be referred to as a reflection point, reflection position, reflection coordinates, or reflection point.

[0176] In the above embodiments, SRS-pos can also be referred to as SRS for positioning or SRS.

[0177] In the above embodiments, auxiliary data can also be referred to as auxiliary information.

[0178] In the above embodiments, the RIS spot can also be referred to as the RIS panel or RIS block.

[0179] Furthermore, the RIS30 can handle communication (e.g., sidelink communication) between multiple terminals 20. In this case, in the embodiments described above, the base station 10 can also be replaced by the terminal 20.

[0180] The wireless relay device and base station of this embodiment can also be configured as the wireless relay device and base station shown in the following embodiments. Alternatively, the following wireless relay method can also be implemented.

[0181] <Structures related to this implementation>

[0182] (Item 1)

[0183] A terminal that has: The transceiver unit transmits and receives reference signals for location positioning via a wireless relay device. Receive information indicating the reflection position of the reference signal reflected by the wireless relay device; and The control unit, upon receiving the reference signal, performs position positioning based on the reflected position. The reflection location is associated with the resource of the reference signal.

[0184] (Item 2)

[0185] According to the terminal described in the first claim, the transceiver unit receives information representing a region in the wireless relay device capable of reflecting signals. While switching the region, the control unit repeatedly measures the reference signal with the same resource.

[0186] (Item 3)

[0187] According to the terminal described in the first item, the transceiver unit receives multiple reference signals. The multiple reference signals each have different resources. The control unit performs measurements on the plurality of reference signals, and based on the results of the measurements, determines the range in which the signal is reflected in the wireless relay device.

[0188] (Item 4)

[0189] The terminal in the first item has a transceiver unit that sends information to the base station indicating whether the terminal supports the ability to perform actions based on information indicating the reflection location.

[0190] (Item 5)

[0191] A base station having: The control unit generates a reference signal for position positioning; and The transmitting unit transmits a reference signal for location positioning to the terminal via a wireless relay device. And send to the terminal information indicating the reflection position of the reference signal reflected by the wireless relay device. The reflection location is associated with the resource of the reference signal.

[0192] (Item 6)

[0193] A communication method, which is executed by a terminal, includes the following steps: The reference signal used for location positioning is received via a wireless relay device; Receive information indicating the reflection position of the reference signal reflected by the wireless relay device; and Upon receiving the reference signal, the location is determined based on the reflection position. The reflection location is associated with the resource of the reference signal.

[0194] Any of the above structures can improve the accuracy of location positioning via the RIS. According to the first, fifth, and sixth items, the coordinates (position) of the RIS's reflection point can be dynamically obtained based on the reflected beam while suppressing the complexity of the base station and terminal. According to the second item, even when the RIS lacks reflection point estimation capabilities, the coordinates of the RIS's reflection point can still be obtained, thus improving the accuracy of location positioning via the RIS. According to the third item, the flexibility of RIS installation locations and settings can be improved, enabling location positioning via the RIS in various scenarios. According to the fourth item, the estimation of the RIS's reflection point can be performed according to the terminal's capabilities.

[0195] (Hardware structure)

[0196] The block diagram used in the description of the above embodiments ( Figure 2 , Figure 3 as well as Figure 4 The diagram illustrates functional unit modules. These functional blocks (components) are implemented through any combination of at least one of hardware and software. Furthermore, there are no particular limitations on the implementation method of each functional block. That is, each functional block can be implemented using a single device that is physically or logically combined, or by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. Functional blocks can also be implemented by combining software within the aforementioned single or multiple devices.

[0197] The functions include judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, the functional block (structural part) that enables sending is called the transmitting unit or transmitter. In short, as mentioned above, there are no particular limitations on the implementation method.

[0198] For example, in one embodiment of this disclosure, the base station 10, terminal 20, and RIS30 can also function as a computer for processing the wireless communication method of this disclosure. Figure 22 This diagram illustrates an example of the hardware structure of a base station 10, a terminal 20, and a RIS30 according to one embodiment of the present disclosure. The base station 10, terminal 20, and RIS30 may also be configured as a computer device that physically includes a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0199] Additionally, in the following description, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware structure of base station 10, terminal 20, and RIS30 can be configured to include one or more of the devices shown in the figures, or it can be configured to not include any of the devices.

[0200] The functions of base station 10, terminal 20 and RIS30 are implemented by reading predetermined software (program) into hardware such as processor 1001 and storage device 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of reading and writing data in storage device 1002 and auxiliary storage device 1003.

[0201] The processor 1001 controls the computer as a whole by instructing the operating system to operate. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, etc. For example, the control unit 140 and control unit 240 described above can also be implemented using the processor 1001.

[0202] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage devices 1003 and communication devices 1004, and performs various processes accordingly. As a program, a program is used that causes the computer to perform at least a portion of the actions described in the above embodiments. For example, Figure 2 The control unit 140 of the base station 10 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. And, for example, Figure 3 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. Although it has been described that the various processes described above are executed by one processor 1001, the various processes described above can also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented by more than one chip. In addition, the program can also be sent from the network via a telecommunications line.

[0203] Storage device 1002 is a computer-readable recording medium, and may be composed of at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. Storage device 1002 may also be referred to as a register, cache, main memory (main storage device), etc. Storage device 1002 can store programs (program code), software modules, etc., that are executable for implementing the communication method of one embodiment of the present disclosure.

[0204] The auxiliary storage device 1003 is a computer-readable recording medium, such as at least one of the following: CD-ROM (CompactDisc ROM) or other optical discs, hard disks, floppy disks, magneto-optical discs (e.g., compact discs, digital multifunction discs, Blu-ray discs, smart cards, flash memory (e.g., cards, sticks, key drives), floppy disks, magnetic stripes, etc. The aforementioned storage medium may, for example, be a database, server, or other suitable media that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0205] The communication device 1004 is hardware (transceiver) used for communication between computers via at least one of a wired network and a wireless network. It may also be referred to as a network device, network controller, network interface card (NIC), communication module, etc. The communication device 1004 may, for example, be configured to include a high-frequency switch, duplexer, filter, frequency synthesizer, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, transceiver antennas, amplifiers, transceiver units, transmission path interfaces, etc., can also be implemented using the communication device 1004. The transceiver unit may also be physically or logically separated into a transmitting unit and a receiving unit.

[0206] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED, etc.). Alternatively, input device 1005 and output device 1006 can also be integrated (e.g., a touch panel).

[0207] Furthermore, the processor 1001 and storage device 1002, among other devices, are connected via a bus 1007 for communicating information. The bus 1007 can be a single bus or can be composed of different buses between devices.

[0208] Furthermore, the base station 10, terminal 20, and RIS30 can be configured to include hardware such as a microprocessor, digital signal processor (DSP), ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), and FPGA (Field Programmable Gate Array), and can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0209] Furthermore, the RIS30 can also have variable phase shifters, phase shifters, amplifiers, antennas, array antennas, etc. as hardware to constitute the variable section 340 and the antenna section 350, as needed.

[0210] Figure 23 An example of the structure of vehicle 2001 is shown. For example... Figure 23 As shown, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a gearshift 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. The various forms / implementations described in this disclosure can also be applied to communication devices mounted on the vehicle 2001, for example, to the communication module 2013.

[0211] The drive unit 2002 may be composed, for example, an engine, a motor, or a hybrid power system of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a steering wheel) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0212] The electronic control unit 2010 consists of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (I / O port) 2033. Signals from various sensors 2021 to 2029 of the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 can also be referred to as an ECU (Electronic Control Unit).

[0213] The signals from various sensors 2021 to 2029 include current signals from current sensor 2021 that monitors the current of the motor, speed signals of the front and rear wheels obtained by speed sensor 2022, air pressure signals of the front and rear wheels obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depress signal obtained by accelerator pedal sensor 2029, brake pedal depress signal obtained by brake pedal sensor 2026, gear lever operation signal obtained by gear lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0214] The Information Service Unit 2012 consists of various devices such as a car navigation system, audio system, speakers, television, and radio, which provide various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The Information Service Unit 2012 uses information obtained from external devices via communication modules 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0215] The Driver Assistance System 2030 comprises various devices used to prevent accidents or reduce driver workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning devices (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps), gyroscope systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System)), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. Furthermore, the Driver Assistance System 2030 transmits and receives various information via the communication module 2013 to achieve driver assistance or autonomous driving functions.

[0216] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 2001 via the communication port. For example, the communication module 2013 can send and receive data with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear shift lever 2006, front wheel 2007, rear wheel 2008, axle 2009, microprocessor 2031 in the electronic control unit 2010, memory (ROM, RAM) 2032, and sensors 2021 to 29 in the vehicle 2001 via the communication port 2033.

[0217] The communication module 2013, controlled by the microprocessor 2031 of the electronic control unit 2010, is a communication device capable of communicating with external devices. For example, it can transmit and receive various types of information with external devices via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. External devices can be, for example, base stations, mobile stations, etc.

[0218] The communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication. Additionally, the communication module 2013 also transmits the following signals input to the electronic control unit 2010 via wireless communication to external devices: the front and rear wheel speed signals obtained by the speed sensor 2022; the front and rear wheel air pressure signals obtained by the air pressure sensor 2023; the vehicle speed signal obtained by the vehicle speed sensor 2024; the acceleration signal obtained by the acceleration sensor 2025; the accelerator pedal depressor signal obtained by the accelerator pedal sensor 2029; the brake pedal depressor signal obtained by the brake pedal sensor 2026; the gear shift lever operation signal obtained by the gear shift lever sensor 2027; and the detection signals for detecting obstacles, vehicles, pedestrians, etc., obtained by the object detection sensor 2028.

[0219] The communication module 2013 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) sent from external devices and displays it on the information service unit 2012 of the vehicle 2001. Furthermore, the communication module 2013 stores the various information received from external devices in a memory 2032 available to the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gearshift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, and sensors 2021-2029 of the vehicle 2001 based on the information stored in the memory 2032.

[0220] (Supplement to the implementation method)

[0221] The above description of this embodiment is not limited to this embodiment. Those skilled in the art should understand various modifications, alterations, substitutions, and replacements. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these values ​​are merely examples, and any appropriate values ​​may be used. The distinctions between items in the above description are not essential to the present invention. Items described in two or more items may be combined as needed, and items described in one item may be applied to items described in another item (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. Multiple functional units may be operated by a single physical component, or a single functional unit may be operated by multiple physical components. Regarding the processing described in the embodiment, the order of processing may be interchanged unless there is a contradiction. For ease of explanation, a functional block diagram is used to illustrate the base station 10 and terminal 20, but such a device may also be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to this embodiment and the software operated by the processor of the terminal 20 according to this embodiment can be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server and other suitable storage media, respectively.

[0222] Furthermore, the notification of information is not limited to the forms / implementations described in this disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher 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. In addition, RRC signaling may also be referred to as an RRC message, for example, it may be an RRC connection setup message, an RRC connection reconfiguration message, etc.

[0223] The various forms / implementations described in this disclosure can also be applied to systems utilizing LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The system may include at least one of 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), other suitable systems, and next-generation systems based on, modified, created, or defined by these systems. Furthermore, multiple systems may be combined (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.).

[0224] The processing procedures, timing, and flow of the various forms / implementations described in this specification may be rearranged in order, provided there is no contradiction. For example, the elements of various steps are indicated using an illustrative order for the methods described in this disclosure, but are not limited to the specific order indicated.

[0225] In this specification, certain actions performed by base station 10 may sometimes also be performed by its upper node, depending on the circumstances. In a network consisting of one or more network nodes having base station 10, it is obvious that various actions performed to communicate with terminal 20 can be performed by base station 10 and at least one of other network nodes besides base station 10 (e.g., considering MME, S-GW, AMF (Access and Mobility Management Function), SMF (Session Management Function), LMF (Location Management Function), etc., but not limited to these). The above example illustrates a single other network node besides base station 10, but other network nodes can also be a combination of multiple other network nodes (e.g., MME and S-GW).

[0226] The information or signals described in this disclosure can be output from a higher (or lower) layer to a lower (or higher) layer. They can also be input or output via multiple network nodes.

[0227] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input or output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0228] The determination in this disclosure can be made by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by a comparison of numerical values ​​(e.g., a comparison with a predetermined value).

[0229] Software, whether called software, firmware, middleware, microcode, hardware description language, or by other names, should be broadly interpreted as referring to commands, command sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0230] In addition, software, commands, and information can also be sent and received via transmission media. For example, when software is sent from a webpage, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of transmission media.

[0231] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc., that may be involved in the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0232] Furthermore, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms that have the same or similar meanings. For example, at least one of the channel and symbol may also be a signal (signaling). Additionally, a signal may also be a message. Furthermore, a component carrier (CC) may also be referred to as carrier frequency, cell, frequency carrier, etc.

[0233] The terms "system" and "network" as used in this disclosure are used interchangeably.

[0234] Furthermore, the information, parameters, etc., described in this disclosure may be represented using absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may also be indicated using indexes.

[0235] The names used for the above parameters are non-limiting in any respect. Furthermore, the formulas, etc., using these parameters sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by all appropriate names, therefore the various names assigned to these channels and information elements are non-limiting in any respect.

[0236] In this disclosure, the terms "base station (BS)," "wireless base station," "base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" are used interchangeably. Sometimes, terms such as macro cell, small cell, femtocell, and picocell are also used to refer to base stations.

[0237] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its coverage area can be divided into several smaller areas, each of which can provide communication services through a base station subsystem (e.g., a small indoor base station RRH: Remote Radio Head). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0238] In this disclosure, the terms "Mobile Station (MS)," "User Terminal (user terminal)," "User Equipment (UE)," and "Terminal" are used interchangeably.

[0239] For mobile stations, those skilled in the art sometimes also use the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or some other appropriate terms.

[0240] At least one of the base station and mobile station can also be referred to as a transmitting device, receiving device, communication device, etc. Additionally, at least one of the base station and mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. This mobile body can be a vehicle (e.g., a car, an airplane, etc.), a mobile body moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Furthermore, at least one of the base station and mobile station also includes devices that do not necessarily move during communication. For example, at least one of the base station and mobile station can also be an IoT (Internet of Things) device such as a sensor.

[0241] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, the communication between the base station and the user terminal can be replaced by communication between multiple terminals 20 (e.g., D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.), and various forms / implementations of this disclosure can also be applied. In this case, the terminal 20 can also be configured to have the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "side"). For example, uplink channel, downlink channel, etc. can also be replaced with side channel.

[0242] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, the base station can also be configured to have the functions of the aforementioned user terminal.

[0243] The terms "determining" and "determining" as used in this disclosure sometimes encompass a variety of actions. For example, "determining" and "determining" may include actions such as judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), and ascertaining, which are considered as actions of "determining" and "determining." Furthermore, "determining" and "determining" may include actions such as receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, and accessing (e.g., accessing data in memory), which are considered as actions of "determining" and "determining." Furthermore, "judgment" and "decision" can encompass matters that have undergone resolving, selecting, choosing, establishing, or comparing, thus considering them as matters that have undergone "judgment" or "decision." That is, "judgment" and "decision" can include matters that have been considered as matters that have undergone "judgment" or "decision." Additionally, "judgment (decision)" can also be replaced by "assuming," "expecting," or "considering," etc.

[0244] The terms "connected," "coupled," or any variations thereof are intended to indicate any direct or indirect connection or combination between two or more elements, including cases where there is one or more intermediate elements between the two elements that are "connected" or "coupled." The combination or connection between elements can be physical, logical, or a combination of these. For example, "access" can be used instead of "connected." In the context of this disclosure, it can be understood that two elements are "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, and, as some non-limiting and non-inclusive examples, using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible regions) to "connect" or "couple" to each other.

[0245] The reference signal can be simply called RS (Reference Signal), or, depending on the standard applied, pilot.

[0246] As used in this disclosure, the word "based on" does not mean "based on only" unless otherwise expressly stated. In other words, the word "based on" means both "based on only" and "based on at least".

[0247] Any reference to elements using the designations "first," "second," etc., as used in this disclosure does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to the first element and the second element does not imply that only two elements can be taken, or that in any form the first element must precede the second element.

[0248] Alternatively, the "unit" in the structure of the above devices can be replaced with "section", "circuit", "equipment", etc.

[0249] When the terms "include," "including," and their variations are used in this disclosure, these terms, like the term "comprising," imply inclusion. Furthermore, the term "or" as used in this disclosure does not refer to XOR.

[0250] A radio frame can consist of one or more frames in the time domain. In the time domain, one or more frames can be called subframes. A subframe can also consist of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0251] A parameter set can be communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set can represent 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 structure, specific filtering processing performed by the transceiver in the frequency domain, and specific windowing processing performed by the transceiver in the time domain.

[0252] In the time domain, a time slot can be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A time slot can be a time unit based on a set of parameters.

[0253] A time slot can contain multiple mini-time slots. Each mini-time slot can consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can consist of fewer symbols than a time slot. PDSCH (or PUSCH) transmitted in time units larger than mini-time slots can be called PDSCH (or PUSCH) mapping type (type) A. PDSCH (or PUSCH) transmitted using mini-time slots can be called PDSCH (or PUSCH) mapping type (type) B.

[0254] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can each be referred to by other corresponding names.

[0255] For example, a subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI can also be called a time slot, mini-time slot, etc., instead of a subframe.

[0256] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules the allocation of radio resources (bandwidth, transmit power, etc., available to each terminal 20) in units of TTI. However, the definition of TTI is not limited to this.

[0257] The Time Interval (TTI) can be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., or it can be a processing unit such as scheduling or link adaptation. Furthermore, when a TTI is given, the actual time interval (e.g., the number of symbols) that the transmission block, code block, codeword, etc., are mapped to can be shorter than that TTI.

[0258] In addition, when one time slot or one mini time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can also be the minimum time unit for scheduling. Furthermore, the number of time slots (mini time slots) constituting the minimum time unit for scheduling can also be controlled.

[0259] A TTI with a duration of 1ms can also be called a normal TTI (TTI in LTE Rel.8-12), a long TTI, a normal subframe, a long subframe, or a time slot. A TTI shorter than a normal TTI can also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini time slot, a sub-time slot, or a time slot.

[0260] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can be understood as a TTI with a duration of more than 1ms, and a short TTI (e.g., a shortened TTI, etc.) can be understood as a TTI with a duration of less than a long TTI but more than 1ms.

[0261] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined based on the parameter set.

[0262] Furthermore, the temporal domain of an RB can contain one or more symbols, which can be a single time slot, a single mini-time slot, a single subframe, or the length of a single TTI. A single TTI, a single subframe, etc., can each be composed of one or more resource blocks.

[0263] In addition, one or more RBs can also be called Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0264] Furthermore, a resource block can consist of one or more resource elements (REs). For example, one RE can be a radio resource area consisting of one subcarrier and one symbol.

[0265] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of contiguous common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can be determined by indexing RBs based on a common reference point of that carrier. PRBs can be defined and numbered within a BWP.

[0266] A BWP can include a UL BWP and a DL BWP. One or more BWPs can be configured for terminal 20 within one carrier.

[0267] At least one of the configured BWPs can be active, and it is not assumed that the terminal 20 will transmit or receive predetermined signals / channels outside of an active BWP. In addition, "cell", "carrier", etc. in this disclosure can be replaced by "BWP".

[0268] The structures of radio frames, subframes, time slots, mini-time slots, and symbols described above are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained in a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other structures can be varied in many ways.

[0269] In this disclosure, for example, in cases where articles are added through translation, such as in English (e.g., a, an, and the), this disclosure also includes cases where the noun following these articles is in a plural form.

[0270] In this disclosure, the phrase "A and B are different" can mean "A and B are not the same." Additionally, this phrase can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0271] The various forms / implementations described in this disclosure can be used individually or in combination, and can be switched depending on the execution. Furthermore, the notification of predetermined information (e.g., a "Yes X" notification) is not limited to being explicit, but can also be implicit (e.g., not notifying the predetermined information).

[0272] The present disclosure has been described in detail above, but 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 as modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the present disclosure is for illustrative purposes only and is not intended to be limiting.

[0273] Label Explanation

[0274] 10 base stations

[0275] 110 Dispatch Department

[0276] 120 Receiving Department

[0277] 130 Setting Department

[0278] 140 Control Department

[0279] 20 terminals

[0280] 210 Sending Department

[0281] 220 Receiving Department

[0282] 230 Setting Department

[0283] 240 Control Department

[0284] 30 wireless repeater devices

[0285] 310 Sending Department

[0286] 320 Receiving Unit

[0287] 330 Control Department

[0288] 340 variable parts

[0289] 350 antenna section

[0290] 1001 processor

[0291] 1002 Storage device

[0292] 1003 Auxiliary storage device

[0293] 1004 Communication device

[0294] 1005 Input Device

[0295] 1006 Output Device

[0296] Vehicle 2001

[0297] 2002 Drive Unit

[0298] 2003 Steering Unit

[0299] 2004 Accelerator Pedal

[0300] 2005 Brake Pedal

[0301] 2006 gearshift lever

[0302] 2007 front wheel

[0303] 2008 rear wheel

[0304] 2009 axle

[0305] 2010 Electronic Control Department

[0306] 2012 Information Service Department

[0307] 2013 Communication Module

[0308] 2021 Current Sensor

[0309] 2022 Speed ​​Sensor

[0310] 2023 Barometric Pressure Sensor

[0311] 2024 vehicle speed sensor

[0312] 2025 Accelerometer

[0313] 2026 Brake Pedal Sensor

[0314] 2027 Gearshift sensor

[0315] 2028 Object Detection Sensor

[0316] 2029 Accelerator Pedal Sensor

[0317] 2030 Driver Assistance Systems Department

[0318] 2031 microprocessor

[0319] 2032 Memory (ROM, RAM)

[0320] 2033 Communication Port (IO Port)

Claims

1. A terminal, comprising: The transceiver unit transmits and receives reference signals for location positioning via a wireless relay device. Receive information indicating the reflection position of the reference signal reflected by the wireless relay device; and The control unit, upon receiving the reference signal, performs position positioning based on the reflected position. The reflection location is associated with the resource of the reference signal.

2. The terminal according to claim 1, wherein, The transceiver unit receives information indicating areas in the wireless relay device capable of reflecting signals. While switching the region, the control unit repeatedly measures the reference signal with the same resource.

3. The terminal according to claim 1, wherein, The transceiver unit receives multiple reference signals. The multiple reference signals each have different resources. The control unit performs measurements on the plurality of reference signals, and based on the results of the measurements, determines the range in which the signal is reflected in the wireless relay device.

4. The terminal according to claim 1, wherein, The transceiver unit sends information to the base station indicating whether the terminal supports the capability to perform actions based on information representing the reflection location.

5. A base station, comprising: The control unit generates a reference signal for position positioning; and The transmitting unit transmits a reference signal for location positioning to the terminal via a wireless relay device. And send to the terminal information indicating the reflection position of the reference signal reflected by the wireless relay device. The reflection location is associated with the resource of the reference signal.

6. A communication method, wherein the communication method is executed by a terminal, wherein, The communication method comprises the following steps: The reference signal used for location positioning is received via a wireless relay device; Receive information indicating the reflection location of the reference signal reflected by the wireless relay device; as well as Upon receiving the reference signal, the location is determined based on the reflection position. The reflection location is associated with the resource of the reference signal.

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