Terminals and communication methods

Abstract

This terminal comprises: a reception unit that receives, from a base station, a configuration pertaining to transmission of a reference signal for uplink location positioning; a control unit that, on the basis of the configuration, determines a combination of antenna ports that satisfies requirements pertaining to coherency; and a transmission unit that transmits the reference signal for uplink location positioning to the base station by using the determined combination of antenna ports that satisfies requirements pertaining to coherency.

Description

Technical Field

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

Background Art

[0002] In a Universal Mobile Telecommunication System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving a further high data rate, low latency, etc. Also, a successor system to LTE is being studied for the purpose of further broadband and high speed from LTE. Successor systems to LTE include, for example, systems called LTE-Advanced (LTE-A), Future Radio Access (FRA), 5th generation mobile communication system (5G), 5G plus (5G+), Radio Access Technology (New-RAT), New Radio (NR), and the like.

[0003] In NR, various wireless technologies and network architectures are being studied in order to meet the requirement of achieving a throughput of 10 Gbps or more while reducing the delay in the wireless section to 1 ms or less (see, for example, Non-Patent Document 1).

[0004] Also, in NR, enhancement of UE (User Equipment) positioning (NR positioning) is being studied (see, for example, Non-Patent Document 2). Furthermore, for the purpose of expanding functions, high-precision positioning by carrier phase measurements (CPM) is being studied.

Prior Art Documents

Non-Patent Documents

[0005]

Non-Patent Document 1

[0006] Differential CP positioning and phase-based UL / DL-AoD positioning, which use the measurement of the received phase difference of carrier waves transmitted from multiple antenna ports or multiple transmission points on the transmitting side, are being considered. However, the currently defined phase synchronization capability between multiple antenna ports has been insufficient for positioning by carrier phase measurement.

[0007] The present invention has been made in view of the above points, and in a wireless communication system, a reference signal suitable for positioning and carrier phase measurement can be used. [Means for solving the problem]

[0008] According to the disclosed technology, a terminal is provided having: a receiving unit that receives settings for transmitting an uplink positioning reference signal from a base station; a control unit that determines a combination of antenna ports that satisfy the requirements for coherence based on the settings; and a transmitting unit that transmits the uplink positioning reference signal to the base station using the determined combination of antenna ports that satisfy the requirements for coherence. [Effects of the Invention]

[0009] According to the disclosed technology, a reference signal suitable for positioning can be used in a wireless communication system for carrier phase measurement. [Brief explanation of the drawing]

[0010] [Figure 1] This figure shows an example configuration of a wireless communication system according to an embodiment of the present invention. [Figure 2] This is a diagram illustrating an example of position determination using carrier phase measurement (1). [Figure 3] This is a diagram illustrating an example of position determination using carrier phase measurement (2). [Figure 4] This is a diagram illustrating an example of position determination using carrier phase measurement (3). [Figure 5] This is a sequence diagram showing an example of PRS settings in an embodiment of the present invention. [Figure 6] This figure shows an example (1) of the antenna configuration in an embodiment of the present invention. [Figure 7] This figure shows an example (2) of the antenna configuration in an embodiment of the present invention. [Figure 8] This figure shows an example (3) of the antenna configuration in an embodiment of the present invention. [Figure 9] This figure shows an example of the functional configuration of the base station 10 in an embodiment of the present invention. [Figure 10] This figure shows an example of the functional configuration of terminal 20 in an embodiment of the present invention. [Figure 11] This figure shows an example of the hardware configuration of a base station 10 or terminal 20 in an embodiment of the present invention. [Figure 12] This figure shows an example of the configuration of a vehicle 2001 in an embodiment of the present invention. [Modes for carrying out the invention]

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

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

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

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

[0015] In addition, in the embodiment of the present invention, "configured" for wireless parameters or the like may mean that predetermined values are pre-configured, or that wireless parameters notified from the base station 10 or the terminal 20 are configured.

[0016] FIG. 1 is a diagram showing a configuration example of a wireless communication system in an embodiment of the present invention. As shown in FIG. 1, the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example, and there may be a plurality of each.

[0017] Base station 10 is a communication device that provides one or more cells and communicates wirelessly with terminal 20. The physical resources of the radio signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. Base station 10 transmits synchronization signals and system information to terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is transmitted, for example, in NR-PBCH and is also called broadcast information. Synchronization signals and system information may be called SSB (SS / PBCH block). As shown in Figure 1, base station 10 transmits control signals or data to terminal 20 via DL (Downlink) and receives control signals or data from terminal 20 via UL (Uplink). Both base station 10 and terminal 20 are capable of transmitting and receiving signals using beamforming. Furthermore, both base station 10 and terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via secondary cells (SCell) and primary cells (PCell) using Carrier Aggregation (CA). In addition, the terminal 20 may communicate via the primary cell of base station 10 and the primary secondary cell group cell (PSCell) of another base station 10 using Dual Connectivity (DC).

[0018] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in Figure 1, Terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 also receives various reference signals transmitted from the base station 10 and performs propagation path quality measurements based on the reception results of these reference signals.

[0019] In 3GPP (registered trademark), sidelink positioning, NR positioning, and RedCap (Reduced Capability) positioning are candidate scopes for positioning consideration. Below, we will explain the operation related to positioning using carrier phase measurements (CPM) within NR positioning.

[0020] Figure 2 is a diagram illustrating an example of positioning by carrier phase measurement (1). Carrier phase measurement is a highly accurate positioning method that uses carrier phase, as employed in GNSS (Global Navigation Satellite System) and other systems. As shown in Figure 2, in positioning by carrier phase measurement, the distance between the reference point and the positioning point is determined using the carrier wave number and the received phase difference of the carrier wave. As shown in Figure 2, the arrival distance L from the satellite to the receiver is calculated by carrier wavelength λ × wave number N + shift Δλ due to the received phase difference.

[0021] Figure 3 is a diagram illustrating an example of position determination by carrier phase measurement (2). As shown in Figure 3, in the case of the L1 signal, there are approximately 500 candidates for N within 100m before and after the receiver.

[0022] The process of determining the wavenumber N, also known as the integer bias, is called ambiguity resolution. A common method involves calculating initial values ​​using multiple satellites before performing ambiguity resolution. Initial values ​​are narrowed down to some extent using propagation time. Several ambiguity resolution methods are known, but representative ones include using different frequency carriers and utilizing satellite movement. After calculating a pseudo-distance from the propagation time, a more accurate distance calculation is performed using the carrier number and phase.

[0023] Figure 4 is a diagram illustrating an example of positioning using carrier phase measurement (3). 3GPP Release 18NR considers carrier phase difference-based positioning (differential CP positioning) and transmission angle-based positioning (phase-based UL / DL-AoD positioning) using reception phase difference measurement of carriers transmitted from each antenna port or multiple transmission points on the transmitting side.

[0024] As shown in Figure 4, a Positioning Reference Signal (PRS) is transmitted from the transmitting antenna port #0 of the transmitting UE using a carrier wave with initial phase φ0tx, and the same PRS is transmitted from the transmitting antenna port #1 using a carrier wave with initial phase φ1tx. The propagation distance difference ΔD is determined based on the received phase difference calculated from the initial phases φ0tx and φ1tx and φ0rx and φ1rx. The UL-AoD (Angle of Departure) is determined from ΔD and the distance between the transmitting antenna ports. The above measurement information is used for positioning.

[0025] Current NR specifications define phase coherence, which indicates the phase synchronization capability between transmitting antenna ports for UL-MIMO. Furthermore, the requirements related to coherence are defined, for example, as shown in Table 1 (see Non-Patent Document 3).

[0026] [Table 1]

[0027] As shown in Table 1, even coherent antenna ports are allowed to have a phase synchronization error of 40 degrees or less. Furthermore, for coherent antenna ports, a relative power error difference of up to 4 dB is permitted, and the time window is specified as 20 ms.

[0028] When applying the current UL-MIMO coherent specification to positioning functions, errors may occur in the initial phase of the PRS carrier, potentially preventing proper positioning. Ideally, in a coherent system, the initial phases φ0tx and φ1tx should be identical. However, the current UL-MIMO coherent specification allows for errors of up to 40 degrees between the initial phases φ0tx and φ1tx.

[0029] Therefore, terminal 20 may perform the following actions 1) to 4).

[0030] Operation 1) When UL-PRS is configured, terminal 20 may assume that information regarding the antenna port transmitting PRS is notified from the network. Terminal 20 may also have the capability to transmit UL-PRS from multiple antenna ports.

[0031] Figure 5 is a sequence diagram showing an example of PRS configuration in an embodiment of the present invention. In step S1, the base station 10 transmits the UL-PRS configuration to the terminal 20. In the subsequent step S2, the base station 10 and the terminal 20 perform carrier phase difference-based positioning and / or launch angle-based positioning using UL-PRS.

[0032] The information relating to the antenna port included in the above UL-PRS configuration may be communicated as part or all of the following 1)-3).

[0033] 1) Notification may be given by the antenna port index. For example, UL-PRS may be transmitted from the antenna port indicated by the antenna port index. For example, signaling may be provided by RRC signaling, MAC-CE and / or DCI. For example, the antenna port index may be signaled by the SRS resource index or SRS resource set index. For example, a PEG (Phase Error Group) described later in operation 2) may be defined and the PEG index may be signaled.

[0034] 2) Notification may be made using the TPMI (Transmit Precoder Matrix Indicator) index (see Non-Patent Document 4). The 3GPP Release 17NR method for notifying antenna ports for MIMO SRS / PUSCH may be used. For example, UL-PRS may be transmitted from the antenna port indicated by the TPMI index.

[0035] 3) Notification may also be provided via TEG (Timing Error Group) information (see Non-Patent Document 2). TEG information is a function supported by NR positioning and is necessary to compensate for transmission and reception timing errors between antenna ports. Antenna ports included in the same TEG will fall within a certain transmission and reception timing error. For example, UL-PRS may be transmitted from the antenna port indicated by the TEG information.

[0036] For example, terminal 20 may request antenna port information for transmitting PRS from the network. Alternatively, terminal 20 may send a signal to the network requesting antenna port information for transmitting PRS. For example, terminal 20 may request antenna port information for transmitting PRS from the network using LPP (LTE Positioning Protocol). For example, terminal 20 may request some or all of the antenna port index, TPMI index, and TEG index from the network.

[0037] For example, if the antenna port information that transmits the PRS is not notified from the network, terminal 20 may report information to the network indicating the antenna port that transmitted the PRS. For example, terminal 20 may report the antenna port information that transmits the PRS to the network using LPP. For example, terminal 20 may report some or all of the antenna port index, TPMI index, and TEG index to the network.

[0038] As a result of the above operation 1), terminal 20 becomes capable of UL-PRS transmission using a coherent antenna port.

[0039] Operation 2) Terminal 20 may assume a coherent group of antenna ports. A coherent group may be a group of antenna ports having a phase error below a certain value. For example, it may be specified as a PEG (Phase Error Group).

[0040] For example, terminal 20 may be instructed by the network to measure the phase error between PEGs. For example, terminal 20 may implicitly determine the number of PEGs from the coherence capabilities of the SRS for MIMO.

[0041] Figure 6 shows an example (1) of an antenna configuration in an embodiment of the present invention. Figure 6 shows an example of a fully coherent terminal 20. Fully coherent may mean that all combinations of antenna ports of terminal 20 are coherent. In Figure 6, all combinations of antenna port #1 to antenna port #4 are coherent.

[0042] Figure 7 shows an example (2) of an antenna configuration in an embodiment of the present invention. Figure 7 shows an example of a terminal 20 that is partially coherent. Partial coherence may mean that only some of the combinations of antenna ports of terminal 20 are coherent. In Figure 7, antenna port #0 and antenna port #2 are coherent, and antenna port #1 and antenna port #3 are coherent. The other combinations, antenna port #0 and antenna port #1, antenna port #0 and antenna port #3, antenna port #1 and antenna port #2, and antenna port #2 and antenna port #3 are not coherent.

[0043] Figure 8 shows an example (3) of an antenna configuration in an embodiment of the present invention. Figure 8 shows an example of a non-coherent terminal 20. Non-coherent may mean that not all combinations of antenna ports of terminal 20 are coherent.

[0044] For example, if terminal 20 reports a UE capability that the capability related to the coherence is fully coherent, the number of PEGs may be determined to be 1. For example, if terminal 20 reports a UE capability that the capability related to the coherence is partially coherent, the number of PEGs may be determined to be 1 or more. For example, if terminal 20 reports a UE capability that the capability related to the coherence is not coherent, the number of PEGs may be determined to be 0.

[0045] For example, terminal 20 may perform UL-PRS transmission using a combination of antenna ports that are coherent. Alternatively, for example, terminal 20 may perform UL-PRS transmission using an antenna port that is any combination of antenna ports included in the PEG.

[0046] As described in operation 2) above, grouping coherent antenna ports can reduce the signaling overhead between the UE and the network for related information.

[0047] Operation 3) Terminal 20 may assume that when UL-PRS is configured, the requirements for coherence that the antenna port must satisfy are defined.

[0048] For example, terminal 20 may assume requirements for coherence for NR positioning that the antenna ports must meet when UL-PRS is configured. For example, these requirements may specify the phase error and / or power error that can be tolerated between the antenna ports. For example, a time window may be specified as the period during which these requirements apply. The time unit of the time window may be μs, ms, symbols, slots, etc. Note that phase error may mean difference of relative phase error, and power error may mean difference of relative power error.

[0049] For example, the requirement may specify only one value for each of the phase error, power error, and time window. Alternatively, the requirement may specify two or more values ​​for each of the phase error, power error, and time window, and the user may decide which requirement to apply depending on their capabilities.

[0050] For example, when UL-PRS is configured, terminal 20 may assume requirements related to coherence for UL-MIMO. For example, such requirements may be those shown in Non-Patent Document 3.

[0051] For example, terminal 20 may transmit UL-PRS to base station 10 using an antenna port that satisfies the coherence requirements of the antenna port described above.

[0052] The above operation 3) reduces the initial phase error of UL-PRS and ensures positioning accuracy.

[0053] Operation 4) Terminal 20 may report its UE capability related to coherence for NR positioning to the network.

[0054] For example, the specification may define the capability for UL-PRS transmission, which is independent of UL-MIMO coherence. Terminal 20 may report its UL-PRS transmission capability and UL-MIMO coherence capability to the network.

[0055] For example, the capability related to UL-PRS transmission may be some or all of the following 1)-4).

[0056] 1) The ability to indicate whether or not it supports UL-PRS transmission using a coherent antenna port, and / or the ability to indicate whether the antenna port of the device is fully coherent, partially coherent, or non-coherent.

[0057] 2) Information on coherent antenna port combinations. For example, terminal 20 that has reported the ability to be partially coherent may further report antenna port indices that are in a coherent relationship. For example, in the example in Figure 7, antenna port #0 and antenna port #2, and antenna port #1 and antenna port #3 may be reported as coherent.

[0058] Furthermore, terminal 20 that reports partial coherence may also report an index indicating a combination of antenna ports that are in a coherent relationship. For example, the index indicating such combinations may be assumed to be defined in the specifications, and may be, for example, a TPMI index.

[0059] 3) The maximum number of coherent antenna ports. For example, the maximum number of coherent antenna ports may be 2.

[0060] 4) Information relating to coherence capability. This may include errors occurring between coherent antenna ports. For example, it may include some or all of the following: a phase error of X degrees, a power error of Y dB, a time window of Z ms, and a transmit timing error of W ns. X, Y, Z, and W may be values ​​uniquely defined in the specification.

[0061] Furthermore, the specification may stipulate that the capability related to coherence for UL-MIMO is to be interpreted as the capability related to UL-PRS transmission. For example, terminal 20 may report the capability related to coherence for UL-MIMO to the network. For example, terminal 20 may perform UL-PRS transmission using the capability related to coherence for MIMO SRS. The capability related to coherence may also be the capability related to UL-PRS transmission as shown in 1) to 4) above.

[0062] The above operation 4) enables UL-PRS transmission using the appropriate coherent antenna port depending on the UE's capabilities.

[0063] Note that Carrier Phase Measurement (CPM) may be interpreted as Carrier Phase Positioning (CPP), Phase-based measurement, Phase-based Positioning (PP), etc.

[0064] Note that "antenna port" may be replaced with "antenna," "antenna element," "antenna reference point (ARP)," etc.

[0065] "Differential carrier phase" may be replaced with "single differential carrier phase," "double differential carrier phase," "triple differential carrier phase," etc.

[0066] "UL-PRS" may be replaced with "SRS for positioning", "SRS (for MIMO)", "DM-RS", "PRACH preamble", "PT-RS", etc.

[0067] "PEG (Phase Error Group)" may be replaced with "Phase Offset Group," "Coherent Group," "Coherent Antenna Group," etc.

[0068] The embodiments of the present invention assume UL positioning (e.g., using the coherence of the UE transmitting antenna), but may be interpreted as DL positioning (e.g., using the coherence of the TRP transmitting antenna). For example, requirements relating to the coherence of PRS transmission at TRP may be specified, and "UL-PRS" may be interpreted as "DL-PRS".

[0069] Note that "signaling" may be interpreted as "configuration via RRC," "activation / deactivation / update via MAC-CE," or "notification via DCI," etc.

[0070] The above-described embodiment may also be applied to NR positioning methods other than carrier phase measurement or carrier phase positioning.

[0071] As described above, terminal 20 can perform UL-PRS transmission using a coherent antenna port when performing carrier phase measurement.

[0072] In other words, in a wireless communication system, a reference signal suitable for positioning can be used for carrier phase measurement.

[0073] (Device configuration) Next, we will describe an example of the functional configuration of the base station 10 and terminal 20 that perform the processes and operations described above. The base station 10 and terminal 20 include functions to implement the embodiments described above. However, the base station 10 and terminal 20 may each have only some of the functions in the embodiments.

[0074] <Base station 10> Figure 9 shows an example of the functional configuration of a base station 10 in an embodiment of the present invention. As shown in Figure 9, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Figure 9 is merely an example. The names of the functional categories and functional units can be anything as long as they can perform the operations according to the embodiment of the present invention.

[0075] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitting unit 110 also transmits inter-network node messages to other network nodes. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining information from the received signals, for example, higher layer information. The transmitting unit 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. The receiving unit 120 also receives inter-network node messages from other network nodes.

[0076] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20. The content of the setting information includes, for example, information related to location positioning settings.

[0077] As described in the embodiment, the control unit 140 performs control related to the setting of position determination. The control unit 140 also performs scheduling. The signal transmission function unit of the control unit 140 may be included in the transmission unit 110, and the signal reception function unit of the control unit 140 may be included in the reception unit 120.

[0078] <Terminal 20> Figure 10 shows an example of the functional configuration of a terminal 20 in an embodiment of the present invention. As shown in Figure 10, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 10 is merely an example. Any functional classification and functional unit names are acceptable as long as they can perform the operations according to the embodiment of the present invention.

[0079] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and acquires signals from higher layers from the received physical layer signals. The receiving unit 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. For example, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20 as D2D communication, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0080] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores pre-set setting information. The content of the setting information includes, for example, information related to positioning settings.

[0081] The control unit 240 performs control related to the setting of position determination, as described in the embodiment. The signal transmission function unit of the control unit 240 may be included in the transmission unit 210, and the signal reception function unit of the control unit 240 may be included in the reception unit 220.

[0082] (Hardware configuration) The block diagrams (Figures 9 and 10) used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the one or more devices with software.

[0083] Functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0084] For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 11 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 according to one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0085] In the following explanation, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0086] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and auxiliary storage device 1003.

[0087] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0088] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes a computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 9 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 10 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunications line.

[0089] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of this disclosure.

[0090] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0091] The communication device 1004 is hardware (transceiver / receiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may include high-frequency switches, duplexers, filters, frequency synthesizers, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmit / receive antenna, amplifier section, transmit / receive section, transmission path interface, etc., may be implemented by the communication device 1004. The transmit / receive section may be implemented with physically or logically separated transmitting and receiving sections.

[0092] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0093] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0094] Furthermore, the base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0095] Figure 12 shows an example of the configuration of vehicle 2001. As shown in Figure 12, vehicle 2001 comprises a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0096] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0097] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0098] Signals from various sensors 2021-2029 include current signals from current sensor 2021 which senses motor current, front or rear wheel rotation speed signals obtained by rotation speed sensor 2022, front or rear wheel air pressure signals obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depression signals obtained by accelerator pedal sensor 2029, brake pedal depression signals obtained by brake pedal sensor 2026, shift lever operation signals obtained by shift lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0099] The Information Services Unit 2012 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001. The Information Services Unit 2012 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0100] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0101] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0102] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0103] The communication module 2013 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 2012. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above input.

[0104] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit, which outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., provided in the vehicle 2001.

[0105] (Summary of the embodiments) As described above, according to an embodiment of the present invention, a terminal is provided having: a receiving unit that receives settings related to the transmission of an uplink positioning reference signal from a base station; a control unit that determines a combination of antenna ports that satisfy the requirements for coherence based on the settings; and a transmitting unit that transmits the uplink positioning reference signal to the base station using the determined combination of antenna ports that satisfy the requirements for coherence.

[0106] With the above configuration, terminal 20 can perform UL-PRS transmission using a coherent antenna port when performing carrier phase measurement. In other words, a reference signal suitable for positioning can be used in the wireless communication system.

[0107] The transmitting unit may transmit a signal to the base station requesting information relating to the antenna port that transmits the uplink positioning reference signal. With this configuration, the terminal 20 can perform UL-PRS transmission using a coherent antenna port when performing carrier phase measurement.

[0108] The control unit may assume a group of antenna ports that are coherent. With this configuration, terminal 20 can perform UL-PRS transmission using coherent antenna ports when performing carrier phase measurement.

[0109] The control unit may assume that the coherence requirements are the phase error, power error, and time window that are permissible between the antenna ports. With this configuration, terminal 20 can perform UL-PRS transmission using coherent antenna ports when performing carrier phase measurement.

[0110] The transmitting unit may transmit information to the base station indicating an antenna port that satisfies the coherence requirement of its own device. With this configuration, when the terminal 20 performs carrier phase measurement, it can perform UL-PRS transmission using a coherent antenna port.

[0111] Furthermore, according to an embodiment of the present invention, a communication method is provided in which a terminal performs the following steps: receiving a setting from a base station for transmitting an uplink positioning reference signal; determining a combination of antenna ports that satisfies the requirements for coherence based on the setting; and transmitting the uplink positioning reference signal to the base station using the determined combination of antenna ports that satisfies the requirements for coherence.

[0112] With the above configuration, terminal 20 can perform UL-PRS transmission using a coherent antenna port when performing carrier phase measurement. In other words, a reference signal suitable for positioning can be used in the wireless communication system.

[0113] (Supplement to the embodiment) While embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as it does not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0114] Furthermore, the notification of information is not limited to the embodiments / models described herein and may be carried out by other methods. For example, the notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0115] Each aspect / embodiment described in this disclosure may be applied to at least one of the following systems: LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new Radio), 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 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems, as well as next-generation systems extended based thereon. Furthermore, multiple systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A with 5G).

[0116] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0117] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0118] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0119] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0120] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0121] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0122] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0123] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0124] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0125] The terms “system” and “network” as used in this disclosure are interchangeable.

[0126] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0127] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0128] In this disclosure, terms such as "base station (BS)", "wireless base station", "base station equipment", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0129] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0130] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform information-based control or operation.

[0131] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0132] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0133] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to a movable object, and its speed of movement is arbitrary. This also includes the case when the mobile body is stationary. The mobile body includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademarks), multicopters, quadcopters, balloons, and items mounted on them. The mobile body may also be a mobile body that moves autonomously based on operation commands. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0134] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0135] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0136] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0137] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0138] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0139] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0140] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0141] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0142] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0143] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe. A subframe may further consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0144] Numerical logic may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerical logic may include, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0145] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a time unit based on neurology.

[0146] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0147] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0148] For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0149] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each terminal 20 to allocate wireless resources (such as the frequency bandwidth and transmission power available to each terminal 20) in TTI units. However, the definition of TTI is not limited to this.

[0150] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0151] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0152] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0153] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0154] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0155] Furthermore, the time domain of RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0156] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0157] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0158] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a particular neurology system in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. A Bandwidth Part (PRB) may be defined and numbered within a given BWP.

[0159] A BWP may include BWPs for UL (UL BWP) and BWPs for DL ​​(DL BWP). One or more BWPs may be configured within a single carrier for a UE.

[0160] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0161] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0162] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0163] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0164] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0165] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way. [Explanation of Symbols]

[0166] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 devices 210 Transmitter 220 Receiver 230 Setting section 240 Control Unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims

1. A receiving unit that receives settings related to the transmission of an uplink positioning reference signal from the base station, Based on the above settings, a control unit determines a combination of antenna ports that satisfies the requirements related to coherence, A terminal having a transmitting unit that transmits the uplink positioning reference signal to the base station using an antenna port combination that satisfies the determined coherence requirements.

2. The terminal according to claim 1, wherein the transmitting unit transmits a signal to the base station requesting information relating to the antenna port that transmits the uplink positioning reference signal.

3. The terminal according to claim 1, wherein the control unit assumes a group of antenna ports that are coherent.

4. The terminal according to claim 1, wherein the control unit assumes that the requirements relating to coherence are the phase error, power error, and time window that are permissible between antenna ports.

5. The terminal according to claim 1, wherein the transmitting unit transmits information to the base station indicating an antenna port that satisfies the coherence requirement of its own device.

6. The procedure for receiving settings related to the transmission of the uplink positioning reference signal from the base station, A procedure for determining a combination of antenna ports that satisfies the coherence requirements based on the above settings, A communication method in which a terminal performs the procedure of transmitting the uplink positioning reference signal to the base station using an antenna port combination that satisfies the determined coherence requirements.

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