Method for transmitting and receiving signals in a wireless communication system and apparatus for supporting the same

Abstract

According to one aspect of this disclosure, a method for a user equipment in a wireless communication system includes the steps of: receiving uplink reference signal (UL RS) configuration information; and transmitting UL RS on UL RS resources configured based on the UL RS configuration information, wherein the UL RS resources include at least one resource element (RE), the at least one RE is configured as N-comb in the frequency domain, determining the start position of each of the at least one RE in the frequency domain based on a comb offset and a preset offset included in the UL RS configuration information, obtaining the preset offset based on the N-comb and at least one orthogonal frequency division multiplexing (OFDM) symbol of the at least one RE, and N is a natural number.

Description

Technical Field

[0001] Various embodiments of this disclosure relate to wireless communication systems. Background Technology

[0002] Wireless access systems have been widely deployed to provide various types of communication services such as voice and data. Typically, a wireless access system is a multiple access system that supports communication among multiple users by sharing available system resources (bandwidth, transmission power, etc.). Examples of multiple access systems include Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA).

[0003] As many communication devices now demand higher communication capacity, the need for mobile broadband communications, which represent a significant improvement over existing radio access technologies (RATs), has increased. Furthermore, next-generation communication systems are considering massive machine-type communications (MTC) capable of providing various services anytime, anywhere by interconnecting a large number of devices or things. Moreover, communication system designs capable of supporting services / UEs sensitive to reliability and latency have been discussed.

[0004] As mentioned above, the introduction of next-generation RATs that take into account enhanced mobile broadband communications, massive MTC, ultra-reliable and low-latency communications (URLLC) has been discussed. Summary of the Invention

[0005] Technical issues

[0006] Various examples disclosed herein can provide methods for transmitting and receiving signals in a wireless communication system, and devices supporting such methods.

[0007] For example, various examples of this disclosure can provide positioning methods in wireless communication systems and devices that support such positioning methods.

[0008] For example, various examples of this disclosure relate to UL RS resource configuration consisting of N-combs, and can provide a positioning method that can reduce signaling overhead by obtaining the starting position of at least one RE included in the UL RS resource in the frequency domain based on the offset and predetermined offset included in the UL RS configuration information, as well as a device supporting the positioning method.

[0009] Those skilled in the art will recognize that the purposes that can be achieved by this disclosure are not limited to those specifically described above, and that the foregoing and other purposes that can be achieved by this disclosure will become clearer from the detailed description below.

[0010] Technical solution

[0011] Various examples disclosed herein may provide methods for transmitting and receiving signals in a wireless communication system, as well as devices supporting such methods.

[0012] In one aspect of this disclosure, a method for a user equipment (UE) in a wireless communication system is provided, the method comprising: receiving uplink reference signal (UL RS) configuration information; and transmitting UL RS on UL RS resources configured based on the UL RS configuration information, the UL RS resources including at least one resource element (RE), wherein the at least one RE is configured as N-comb in the frequency domain, wherein a starting position in the frequency domain for each of the at least one RE is determined based on a comb offset included in the UL RS configuration information and a preset offset, wherein the preset offset is obtained based on the N-comb and at least one orthogonal frequency division multiplexing (OFDM) symbol for the at least one RE, wherein N is a natural number.

[0013] In another aspect of this disclosure, an apparatus in a wireless communication system is provided, comprising: at least one processor; and at least one memory operatively coupled to the at least one processor to store one or more instructions configured to cause the at least one processor to perform operations including: receiving uplink reference signal (UL RS) configuration information; and transmitting UL RS on UL RS resources configured based on the UL RS configuration information, the UL RS resources including at least one resource element (RE), wherein the at least one RE is configured as N-comb in the frequency domain, wherein the starting position of each of the at least one RE in the frequency domain is determined based on a comb offset and a preset offset included in the UL RS configuration information, wherein the preset offset is obtained based on the N-comb and at least one orthogonal frequency division multiplexing (OFDM) symbol for the at least one RE, where N is a natural number.

[0014] In another aspect of this disclosure, a user equipment (UE) in a wireless communication system is provided, comprising: at least one transceiver; at least one processor; and at least one memory operatively coupled to the at least one processor to store one or more instructions configured to cause the at least one processor to perform operations including: receiving uplink reference signal (UL RS) configuration information; and transmitting UL RS on UL RS resources configured based on the UL RS configuration information, the UL RS resources including at least one resource element (RE), wherein the at least one RE is configured as N-comb in the frequency domain, wherein the starting position of each of the at least one RE in the frequency domain is determined based on a comb offset and a preset offset included in the UL RS configuration information, wherein the preset offset is obtained based on the N-comb and at least one orthogonal frequency division multiplexing (OFDM) symbol for the at least one RE, where N is a natural number.

[0015] In another aspect of this disclosure, a computer-readable storage medium is provided storing at least one computer program comprising one or more instructions, which, when executed by at least one processor, cause the at least one processor to perform operations for a user equipment (UE), the operations including: receiving uplink reference signal (UL RS) configuration information; and transmitting UL RS on UL RS resources configured based on the UL RS configuration information, the UL RS resources comprising at least one resource element (RE), wherein the at least one RE is configured as N-comb in the frequency domain, wherein the starting position of each of the at least one RE in the frequency domain is determined based on a comb offset and a preset offset included in the UL RS configuration information, wherein the preset offset is obtained based on the N-comb and at least one orthogonal frequency division multiplexing (OFDM) symbol for the at least one RE, where N is a natural number.

[0016] In another aspect of this disclosure, a method for a base station in a wireless communication system is provided, the method comprising: transmitting uplink reference signal (UL RS) configuration information; and receiving UL RS on UL RS resources configured based on the UL RS configuration information, the UL RS resources including at least one resource element (RE), wherein the at least one RE is configured as N-comb in the frequency domain, wherein a starting position in the frequency domain for each of the at least one RE is determined based on a comb offset and a preset offset included in the UL RS configuration information, wherein the preset offset is obtained based on the N-comb and at least one orthogonal frequency division multiplexing (OFDM) symbol for the at least one RE, wherein N is a natural number.

[0017] In another aspect of this disclosure, a base station in a wireless communication system is provided, comprising: at least one processor; and at least one memory operatively coupled to the at least one processor to store one or more instructions configured to cause the at least one processor to perform operations including: transmitting uplink reference signal (UL RS) configuration information; and receiving UL RS on UL RS resources configured based on the UL RS configuration information, the UL RS resources including at least one resource element (RE), wherein the at least one RE is configured as N-comb in the frequency domain, wherein the starting position of each of the at least one RE in the frequency domain is determined based on a comb offset and a preset offset included in the UL RS configuration information, wherein the preset offset is obtained based on the N-comb and at least one orthogonal frequency division multiplexing (OFDM) symbol for the at least one RE, where N is a natural number.

[0018] For example, based on UL RS configured for positioning, the preset offset can be different between at least one OFDM symbol.

[0019] For example, each of at least one RE can be configured in ascending order from the starting position with N intervals in the frequency domain.

[0020] For example, the starting position in the frequency domain of each of at least one RE can be determined based on a modulo-N operation performed on the value obtained by adding the comb offset and the preset offset.

[0021] For example, UL RS configuration information can be received from higher levels.

[0022] For example, the transmit power for UL RS can be determined based on the path loss measured by a reference signal (RS) configured as Quasi-Co-location (QCL) type D.

[0023] For example, the UL RS can be a probe reference signal (SRS).

[0024] The various embodiments of this disclosure described above are merely some preferred embodiments of this disclosure, and those skilled in the art can deduce and understand many embodiments that reflect the technical features of the various embodiments of this disclosure based on the following detailed description.

[0025] Technical effect

[0026] According to various embodiments of this disclosure, the following effects can be achieved.

[0027] Based on various examples of this disclosure, methods for transmitting and receiving signals in a wireless communication system, as well as devices supporting such methods, can be provided.

[0028] For example, according to various examples of this disclosure, a positioning method in a wireless communication system and a device supporting the positioning method can be provided.

[0029] For example, various examples of this disclosure relate to UL RS resource configuration consisting of N-combs, and can provide a positioning method that can reduce signaling overhead by obtaining the starting position of at least one RE included in the UL RS resource in the frequency domain based on the offset and predetermined offset included in the UL RS configuration information, as well as a device supporting the positioning method.

[0030] Those skilled in the art will recognize that the effects achievable by this disclosure are not limited to those specifically described above, and that other advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings are included to provide a further understanding of various embodiments of this disclosure, and together with the detailed description, they provide various embodiments of this disclosure. However, the technical features of the various embodiments of this disclosure are not limited to the specific drawings. Features disclosed in each drawing are combined with each other to configure new embodiments. Reference numerals in each drawing correspond to structural elements.

[0032] Figure 1 This is a diagram illustrating a physical channel that can be used in various embodiments of this disclosure and a signal transmission method using a physical channel.

[0033] Figure 2 This is a diagram illustrating the radio frame structure in a new radio access technology (NR) system to which various embodiments of this disclosure can be applied.

[0034] Figure 3 This is a diagram illustrating the time slot structure in an NR system to which various embodiments of the present disclosure can be applied.

[0035] Figure 4 This is a diagram illustrating various embodiments of the present disclosure that can be applied to self-contained time-slot structures.

[0036] Figure 5 This is a diagram illustrating the various embodiments of the present disclosure to which the Synchronization Signal Block (SSB) structure can be applied.

[0037] Figure 6 This is a diagram illustrating exemplary SSB transmission methods to which various embodiments of this disclosure can be applied.

[0038] Figure 7 This is a diagram illustrating exemplary multi-beam transmission of an SSB that can be applied to various embodiments of this disclosure.

[0039] Figure 8This is a diagram illustrating exemplary methods for instructing the actual transmission of SSB, SSB_tx, which can be applied to various embodiments of this disclosure.

[0040] Figure 9 This is a diagram illustrating exemplary UL-DL timing relationships that can be applied to various embodiments of this disclosure.

[0041] Figure 10 This is a diagram illustrating exemplary positioning protocol configurations for UE positioning that can be applied to various embodiments of this disclosure.

[0042] Figure 11 Exemplary mappings of Position Reference Signals (PRS) in Long Term Evolution (LTE) systems to which various embodiments of this disclosure can be applied are illustrated.

[0043] Figure 12 This is a diagram illustrating an example architecture of a system for locating a UE to which various embodiments of this disclosure can be applied.

[0044] Figure 13 This is a diagram illustrating examples of the process of locating a UE to which various embodiments of the present disclosure can be applied.

[0045] Figure 14 This is a diagram illustrating various implementation methods that can be applied to the protocol layer for supporting LTE Location Protocol (LPP) message transmission.

[0046] Figure 15 This is a diagram illustrating various implementations that can be applied to the protocol layer for supporting the transmission of Protocol Data Units (PDUs) of the NR Positioning Protocol a (NRPPa).

[0047] Figure 16 This is a diagram illustrating various implementation methods that can be applied to the Time Difference of Observation Achievement (OTDOA) localization method.

[0048] Figure 17 This is a diagram illustrating various implementation methods that can be applied to multi-round-trip time (multi-RTT) positioning methods.

[0049] Figure 18 An example of a Comb-4 type SRS resource mapping is illustrated according to the present disclosure.

[0050] Figure 19a and Figure 19b This is a flowchart illustrating an example of an SRS resource transmission method for a base station / UE according to the present disclosure.

[0051] Figure 20 An example of an interlaced RE pattern / type in the Com-2 type according to the present disclosure is shown.

[0052] Figure 21 An example of an interlaced RE pattern / type in the Com-4 type according to this disclosure is illustrated.

[0053] Figure 22a and Figure 22b This is a flowchart illustrating a base station / UE SRS resource transmission method according to another example of this disclosure.

[0054] Figure 23 A beam scanning example according to this disclosure is illustrated.

[0055] Figure 24a and Figure 24b This is a flowchart illustrating a base station / UE SRS resource transmission method according to another example of this disclosure.

[0056] Figure 25 This is a flowchart illustrating an example of a UL RS transmission method for a UE according to this disclosure.

[0057] Figure 26 This is a flowchart illustrating an example of a UL RS receiving method for a TP according to this disclosure.

[0058] Figure 27 This is a diagram illustrating an apparatus for implementing various embodiments of the present disclosure.

[0059] Figure 28 Exemplary communication systems to which various embodiments of this disclosure can be applied are illustrated.

[0060] Figure 29 Exemplary wireless devices to which various embodiments of this disclosure are applied are illustrated.

[0061] Figure 30 Other exemplary wireless devices that apply various embodiments of this disclosure are illustrated.

[0062] Figure 31 Exemplary portable devices that apply various embodiments of the present disclosure are illustrated.

[0063] Figure 32 Exemplary vehicles or autonomous vehicles that apply various embodiments of the present disclosure are illustrated.

[0064] Figure 33 Exemplary vehicles that apply various embodiments of this disclosure are shown. Detailed Implementation

[0065] The various embodiments of this disclosure described below are combinations of elements and features of various embodiments of this disclosure in specific forms. Unless otherwise mentioned, elements or features are to be considered selective. Each element or feature may be practiced without combination with other elements or features. Furthermore, various embodiments of this disclosure may be constructed by combining portions of elements and / or features. The order of operations described in the various embodiments of this disclosure may be rearranged. Some constructions or elements of any embodiment may be included in another embodiment and may be replaced by corresponding constructions or features of another embodiment.

[0066] In the description of the accompanying drawings, detailed descriptions of known processes or steps of various embodiments of this disclosure will be avoided so as not to obscure the subject matter of these embodiments. Furthermore, processes or steps that are readily understood by those skilled in the art will also not be described.

[0067] Throughout the specification, when a part "comprises" or "includes" a component, this indicates that, unless otherwise stated, other components are not excluded and may be further included. The terms "unit," "device," and "module" described in the specification indicate a unit for performing at least one function or operation, which may be implemented by hardware, software, or a combination thereof. Furthermore, unless otherwise indicated in the specification or unless the context clearly indicates otherwise, in the context of the various embodiments of this disclosure (more specifically, in the context of the appended claims), the terms "a" or "an," "an," "the," etc., may include both singular and plural representations.

[0068] In the various embodiments of this disclosure, the data transmission and reception relationship between a base station (BS) and a user equipment (UE) is primarily described. A BS refers to a terminal node in the network that directly communicates with the UE. Specific operations described as being performed by the BS can be performed by upper-layer nodes of the BS.

[0069] That is, obviously, in a network consisting of multiple network nodes including the BS, various operations performed to communicate with the UE can be performed by the BS or network nodes other than the BS. The term "BS" can be replaced by fixed station, node B, evolved Node B (eNode B or eNB), gNode B (gNB), advanced base station (ABS), access point, etc.

[0070] In various embodiments of this disclosure, the term terminal may be replaced by UE, mobile station (MS), subscriber station (SS), mobile subscriber station (MSS), mobile terminal, advanced mobile station (AMS), etc.

[0071] The transmitting end is a fixed and / or mobile node that provides data or voice services, while the receiving end is a fixed and / or mobile node that receives data or voice services. Therefore, on the uplink (UL), the UE can act as the transmitting end and the BS can act as the receiving end. Similarly, on the downlink (DL), the UE can act as the receiving end and the BS can act as the transmitting end.

[0072] Various embodiments of this disclosure may be supported by at least one disclosed standard specification for wireless access systems including: IEEE 802.xx systems, 3rd Generation Partnership Project (3GPP) systems, 3GPP Long Term Evolution (LTE) systems, 3GPP 5th Generation (5G) New RAT (NR) systems, or 3GPP2 systems. Specifically, various embodiments of this disclosure can be supported by technical specifications including: 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.300, 3GPP TS 36.321, 3GPP TS 36.331, 3GPP TS 36.355, 3GPP TS 36.455, 3GPP TS 37.355, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.215, 3GPP TS 38.300, 3GPP TS 38.321, 3GPP TS 38.331, and 3GPP TS 38.455. In other words, any steps or parts not described in the various embodiments of this disclosure can be described with reference to the above-mentioned standard specifications. Furthermore, all terms used herein can be described by standard specifications.

[0073] Various embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The detailed description given below with reference to the drawings is intended to explain exemplary embodiments of the present disclosure, and not to show the only embodiments that can be implemented according to the present disclosure.

[0074] The following detailed description includes specific terminology to provide a thorough understanding of the various embodiments of this disclosure. However, it will be apparent to those skilled in the art that other terms may be used instead of the specific terms without departing from the technical spirit and scope of the various embodiments of this disclosure.

[0075] The following sections describe 3GPP LTE / LTE-A and 3GPP NR systems as examples of wireless access systems.

[0076] Various embodiments of this disclosure can be applied to various wireless access systems such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc.

[0077] CDMA can be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented using radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), and GSM Evolution with Enhanced Data Rates (EDGE). OFDMA can be implemented using radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Evolved UTRA (E-UTRA).

[0078] UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP LTE is part of an evolved UMTS (E-UMTS) using E-UTRA, employing OFDMA for DL ​​and SC-FDMA for UL. LTE-Advanced (LTE-A) is an evolution of 3GPP LTE.

[0079] Although various embodiments of this disclosure are described in the context of 3GPP LTE / LTE-A systems and 3GPP NR systems to illustrate the technical features of these embodiments, they can also be applied to IEEE 802.16e / m systems, etc.

[0080] 1.3 Overview of the GPP System

[0081] 1.1. Physical Channels and General Signal Transmission

[0082] In a radio access system, the UE receives information from the base station on the DL (Data Channel) and transmits information to the base station on the UL (Upper Channel). The information transmitted and received between the UE and the base station includes general data information and various types of control information. Depending on the type / purpose of the information transmitted and received between the base station and the UE, there are many physical channels.

[0083] Figure 1 This is a diagram illustrating physical channels and signal transmission methods using physical channels that can be used in various embodiments of this disclosure.

[0084] When the UE is powered on or enters a new cell, the UE performs an initial cell search (S11). The initial cell search involves obtaining synchronization with the BS. Specifically, the UE synchronizes its timing with the base station and obtains information such as the cell identifier (ID) by receiving the primary synchronization channel (P-SCH) and secondary synchronization channel (S-SCH) from the BS.

[0085] Then, the UE can obtain the information broadcast in the cell by receiving the physical broadcast channel (PBCH) from the base station.

[0086] During the initial cell search, the UE can monitor the DL channel status by receiving the downlink reference signal (DL RS).

[0087] After the initial cell search, the UE can obtain more detailed system information by receiving the Physical Downlink Control Channel (PDCCH) and information based on the PDCCH on the Physical Downlink Shared Channel (PDSCH) (S12).

[0088] Subsequently, to establish a connection with the eNB, the UE can perform a random access procedure with the eNB (S13 to S16). During the random access procedure, the UE can transmit a preamble on the Physical Random Access Channel (PRACH) (S13) and can receive the PDCCH and the Random Access Response (RAR) for the preamble on the PDSCH associated with the PDCCH (S14). The UE can transmit the PUSCH using the scheduling information in the RAR (S15) and perform a contention resolution procedure including receiving the PDCCH signal and the corresponding PDSCH signal (S16).

[0089] When the random access procedure is performed in two steps, steps S13 and S15 can be combined into one operation for UE transmission, while steps S14 and S16 can be combined into one operation for BS transmission.

[0090] Following the above process, during the general UL / DL signal transmission process, the UE can receive PDCCH and / or PDSCH from the BS (S17) and send the Physical Uplink Shared Channel (PUSCH) and / or Physical Uplink Control Channel (PUCCH) to the BS (S18).

[0091] The control information sent by the UE to the BS is collectively referred to as uplink control information (UCI). UCI includes hybrid automatic repeat and request-acknowledge / negative-acknowledge (HARQ-ACK / NACK), scheduling request (SR), channel quality indicator (CQI), precoding matrix index (PMI), rank indicator (RI), etc.

[0092] Generally, UCIs are sent periodically on the PUCCH. However, if control information and service data should be sent simultaneously, they can be sent on the PUSCH. Additionally, UCIs can be sent non-periodically on the PUSCH once a request / command is received from the network.

[0093] 1.2. Radio Frame Structure

[0094] Figure 2 This is a diagram illustrating the radio frame structure in an NR system to which various embodiments of this disclosure can be applied.

[0095] NR systems can support multiple parameter sets. A parameter set can be defined by the subcarrier spacing (SCS) and cyclic prefix (CP) overhead. Multiple SCSs can be derived by scaling the default SCS by an integer N (or μ). Furthermore, even assuming that very small SCSs are not used at very high carrier frequencies, the parameter set to be used can be selected independently of the cell's frequency band. In addition, NR systems can support various frame structures based on multiple parameter sets.

[0096] Now, a description of the OFDM parameter sets and frame structures that can be considered for NR systems will be given. Several OFDM parameter sets supported by the NR system can be defined as listed in Table 1. For the bandwidth portion, μ and CP are obtained from the RRC parameters provided by the BS.

[0097] [Table 1]

[0098] μ <![CDATA[Δf=2 μ ·15[kHz]]]> Cyclic prefix 0 15 normal 1 30 normal 2 60 Normal, Extended 3 120 normal 4 240 normal

[0099] In NR, multiple parameter sets (e.g., SCS) are supported to support a variety of 5G services. For example, a 15kHz SCS supports a wide area in the cellular band, a 30kHz / 60kHz SCS supports dense urban areas, lower latency, and a wider carrier bandwidth, while a 60kHz or higher SCS supports a bandwidth greater than 24.25GHz to overcome phase noise.

[0100] The NR band is defined by two types of frequency ranges (FR1 and FR2). FR1 can be the range below 6 GHz, while FR2 can be the range above 6 GHz, i.e., the millimeter wave (mmWave) band.

[0101] As an example, Table 2 below defines the NR band.

[0102] [Table 2]

[0103] Frequency range name Corresponding frequency range Subcarrier spacing FR1 410MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0104] Regarding the frame structure in the NR system, the temporal dimension of each field is represented by the NR's basic time unit T. c =1 / (△f) max *N f Multiples of ), where Δf max =480*10 3 Hz and a value N related to the size of the Fast Fourier Transform (FFT) or Inverse Fast Fourier Transform (IFFT). f Given as N f =4096. T is given as the time unit and sampling time based on LTE. s = 1 / ((15kHz)*2048) of T c and T s Placed in the following relation: T s / T c =64. DL and UL transmissions are organized into (radio) frames, each with a duration of T. f =(△f max *N f / 100)*T c = 10ms. Each radio frame consists of 10 subframes, and the duration of each subframe is T. sf =(△f max *N f / 1000)*T c = 1ms. There can be a set of frames used for the uplink and a set of frames used for the downlink. For the parameter set μ, the time slots are numbered n in ascending order within the subframes. μ s ∈{0,…,N slot,μ subframe -1}, and numbered n in ascending order in the radio frame. μ s,f ∈{0,…,N slot ,μ frame -1}. A time slot includes N μ symb N consecutive OFDM symbols μ symb Depends on CP. Slot n in the subframe μ s The start of OFDM symbol n in the same subframe μ s *N μ symb The beginnings are aligned in time.

[0105] Table 3 lists the number of symbols per slot, the number of slots per frame, and the number of slots per subframe for each SCS under the normal CP condition, while Table 4 lists the number of symbols per slot, the number of slots per subframe, and the number of slots per subframe for each SCS under the extended CP condition.

[0106] [Table 3]

[0107]

[0108] [Table 4]

[0109]

[0110] In the above table, N slot symb N represents the number of symbols in a time slot. frame,μ slot N represents the number of time slots in a frame. subframe,μ slot This indicates the number of time slots in a subframe.

[0111] In the various embodiments of this disclosure applicable to NR systems, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for a UE. Therefore, time periods (absolute time) comprising the same number of symbols (e.g., subframes (SF), slots, or TTI) (generally referred to as time units (TU) for convenience) can be configured differently for the aggregated cells.

[0112] Figure 2 An example of μ = 2 (i.e., SCS of 60 kHz) is given, where, referring to Table 3, a subframe can comprise four time slots. As an example, Figure 2 A subframe is defined as slots {1, 2, 4}, and the number of slots that can be included in a subframe is defined as listed in Table 3 or Table 4.

[0113] In addition, a mini slot can contain 2, 4, or 7 symbols, less than 2 symbols, or more than 7 symbols.

[0114] Figure 3 This is a diagram illustrating the time slot structure in an NR system to which various embodiments of the present disclosure can be applied.

[0115] Reference Figure 3 A time slot includes multiple symbols in the time domain. For example, a time slot includes 7 symbols in normal CP and 6 symbols in extended CP.

[0116] A carrier comprises multiple subcarriers in the frequency domain. An RB is defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain.

[0117] A bandwidth portion (BWP) defined by multiple consecutive (P)RBs in the frequency domain can correspond to a set of parameters (e.g., SCS, CP length, etc.).

[0118] A carrier can include up to N (e.g., 5) BWPs. Data communication can occur within an active BWP, and only one BWP can be active for a single UE. In the resource grid, each element is referred to as a complex symbol that can be mapped to a RE.

[0119] Figure 4 This is a diagram illustrating various embodiments of the present disclosure that can be applied to self-contained time-slot structures.

[0120] A self-contained time slot structure can refer to a time slot structure in which the DL control channel, DL / UL data, and UL control channel can all be included in a single time slot.

[0121] exist Figure 4 In the diagram, shaded areas (e.g., symbol index = 0) indicate DL control areas, while black areas (e.g., symbol index = 13) indicate UL control areas. The remaining areas (e.g., symbol indices = 1 to 12) can be used for DL ​​or UL data transmission.

[0122] Based on this architecture, the BS and UE can sequentially perform DL and UL transmissions within a single time slot. That is, the BS and UE can not only send and receive DL data but also send and receive UL ACK / NACK for DL ​​data within a single time slot. Therefore, this architecture can reduce the time required until data retransmission occurs in the event of a data transmission error, thereby minimizing the latency of the final data transmission.

[0123] In this self-contained time slot structure, a predetermined time interval is required to allow the BS and UE to switch from transmit mode to receive mode and vice versa. Therefore, in this self-contained time slot structure, some OFDM symbols during the handover from DL to UL can be configured as guard periods (GPs).

[0124] Although the self-contained time slot structure has been described above as including both a DL control region and a UL control region, the control region can be optionally included in the self-contained time slot structure. In other words, the self-contained time slot structure according to various embodiments of this disclosure can cover cases including only a DL control region or a UL control region, as well as cases including both a DL control region and a UL control region, such as... Figure 12 As shown.

[0125] Furthermore, the order of the regions included in a time slot can be changed depending on the implementation. For example, a time slot may include a DL control region, a DL data region, a UL control region, and a UL data region in this order, or a UL control region, a UL data region, a DL control region, and a DL data region in this order.

[0126] PDCCH can be transmitted in the DL control area, and PDSCH can be transmitted in the DL data area. PUCCH can be transmitted in the UL control area, and PUSCH can be transmitted in the UL data area.

[0127] 1.3. Channel Structure

[0128] 1.3.1. DL Channel Structure

[0129] As described below, the BS sends relevant signals to the UE on the DL channel, while the UE receives relevant signals from the BS on the DL channel.

[0130] 1.3.1.1. Physical Downlink Shared Channel (PDSCH)

[0131] PDSCH transmits DL data (e.g., DL Shared Channel Transport Block (DL-SCH TB)) using modulation schemes such as Quadrature Phase Shift Keying (QPSK), 16QAM, 64QAM, or 256QAM. TBs are encoded into codewords. PDSCH can transmit up to two codewords. Scrambling and modulation mapping are performed based on the codewords, and the modulation symbols generated from each codeword are mapped to one or more layers (layer mapping). Each layer, along with the demodulation reference signal (DMRS), is mapped to a resource, generating OFDM symbol signals, and transmitted through the corresponding antenna ports.

[0132] 1.3.1.2. Physical Downlink Control Channel (PDCCH)

[0133] PDCCH can transmit downlink control information (DCI), such as DL data scheduling information and UL data scheduling information. PUCCH can transmit uplink control information (UCI), such as acknowledgment / negative acknowledgment (ACK / NACK) information for DL ​​data, channel state information (CSI), and scheduling requests (SR).

[0134] The PDCCH carries downlink control information (DCI) and is modulated using quadrature phase shift keying (QPSK). Depending on the aggregation level (AL), a PDCCH includes 1, 2, 4, 8, or 16 control channel elements (CCEs). A CCE includes 6 resource element groups (REGs). A REG is defined by multiplying a (P)RB by an OFDM symbol.

[0135] PDCCH is transmitted in a control resource set (CORESET). A CORESET is defined as a set of REGs with a given set of parameters (e.g., SCS, CP length, etc.). Multiple CORESETs for a UE can overlap in the time / frequency domain. CORESETs can be configured by system information (e.g., Master Information Block (MIB)) or by UE-specific higher-layer (RRC) signaling. Specifically, the number of RBs and symbols (up to 3 symbols) included in a CORESET can be configured by higher-layer signaling.

[0136] For each CORESET, the precoder granularity in the frequency domain is set to one of the following via higher-layer signaling:

[0137] -sameAsREG-bundle: This is equal to the REG bundle size in the frequency domain.

[0138] -allContiguousRBs: This is equal to the number of consecutive RBs in the CORESET frequency domain.

[0139] CORESET REGs are numbered in a time-priority mapping manner. That is, REGs are numbered sequentially in ascending order, starting from 0 for the first OFDM symbol of the lowest-numbered RB in CORESET.

[0140] CORESET's CCE-to-REG mapping can be either interleaved or non-interleaved.

[0141] The UE obtains the DCI transmitted on the PDCCH by decoding (so-called blind decoding) a set of PDCCH candidates. The set of PDCCH candidates decoded by the UE is defined as the PDCCH search space set. The search space set can be a common search space (CSS) or a UE-specific search space (USS). The UE can obtain the DCI by monitoring PDCCH candidates in one or more search space sets configured by the MIB or higher-layer signaling. Each CORESET configuration is associated with one or more search space sets, and each search space set is associated with one CORESET configuration. A search space set is determined based on the following parameters.

[0142] -controlResourceSetId: The set of control resources associated with the search space set.

[0143] -monitoringSlotPeriodicityAndOffset: PDCCH monitoring period (in time slots) and PDCCH monitoring offset (in time slots).

[0144] -monitoringSymbolsWithinSlot: PDCCH monitoring pattern within a PDCCH monitoring slot (e.g., the first symbol in CORESET).

[0145] -nrofCandidates: The number of PDCCH candidates (one of 0, 1, 2, 3, 4, 5, 6 and 8) for each AL = {1, 2, 4, 8, 16}.

[0146] Table 5 lists exemplary features for each search space type.

[0147] [Table 5]

[0148]

[0149] Table 6 lists exemplary DCI formats transmitted over the PDCCH.

[0150] [Table 6]

[0151]

[0152] DCI format 0_0 can be used to schedule PUSCH based on TB (or TB level), while DCI format 0_1 ​​can be used to schedule PUSCH based on TB (or TB level) or PUSCH based on code block group (CBG) (or CBG level). DCI format 1_0 can be used to schedule PDSCH based on TB (or TB level), while DCI format 1_1 can be used to schedule PDSCH based on TB (or TB level) or PDSCH based on CBG (or CBG level). DCI format 2_0 is used to transmit dynamic slot format information (e.g., dynamic slot format indicator (SFI)) to the UE, while DCI format 2_1 is used to transmit DL priority information to the UE. DCI format 2_0 and / or DCI format 2_1 can be transmitted to the UEs of the group on a group common PDCCH (GC-PDCCH) that serves as a PDCCH for a group of UEs.

[0153] 1.3.2. UL Channel Structure

[0154] The UE sends relevant signals to the BS on the UL channel described later, and the BS receives relevant signals from the UE on the UL channel.

[0155] 1.3.2.1. Physical Uplink Shared Channel (PUSCH)

[0156] PUSCH transmits UL data (e.g., UL Shared Channel Transport Block (UL-SCH TB)) and / or UCI using either Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveforms. If PUSCH is transmitted using a DFT-s-OFDM waveform, the UE transmits PUSCH by applying transform precoding. For example, if transform precoding is not possible (e.g., transform precoding is disabled), the UE can transmit PUSCH using a CP-OFDM waveform, and if transform precoding is possible (e.g., transform precoding is enabled), the UE can transmit PUSCH using either a CP-OFDM or DFT-s-OFDM waveform. PUSCH transmission can be dynamically scheduled via UL licensing in the DCI or semi-statically scheduled via higher-layer signaling (e.g., RRC signaling) (and / or Layer 1 (L1) signaling (e.g., PDCCH)) (configured licensing). PUSCH transmission can be performed in a codebook-based or non-codebook-based manner.

[0157] 1.3.2.2. Physical Uplink Control Channel (PUCCH)

[0158] The PUCCH transmits UCI, HARQ-ACK, and / or SR, and is classified as either a short PUCCH or a long PUCCH based on the duration of its transmission. Table 7 lists exemplary PUCCH formats.

[0159] [Table 7]

[0160]

[0161] PUCCH format 0 transmits up to 2 bits of UCI and maps them in a sequence-based manner for transmission. Specifically, the UE sends a specific UCI to the BS by sending one of multiple sequences on the PUCCH of PUCCH format 0. The UE sends the PUCCH of PUCCH format 0 in the PUCCH resources configured for the corresponding SR only when the UE sends an affirmative SR.

[0162] PUCCH format 1 transmits up to 2 bits of UCI, and the modulation symbols of the UCI are extended in the time domain using OCC (which is configured differently depending on whether frequency hopping is performed). DMRS (i.e., time division multiplexing (TDM) transmission) is transmitted in symbols that do not transmit modulation symbols.

[0163] PUCCH format 2 transmits more than 2 bits of UCI and the modulation symbols of DCI are transmitted with DMRS in frequency division multiplexing (FDM). DMRS is located at a density of 1 / 3 in symbols #1, #4, #7, and #10 of a given RB. A pseudo-noise (PN) sequence is used for the DMRS sequence. Frequency hopping can be activated for a 1-symbol PUCCH format 2.

[0164] PUCCH format 3 does not support UE multiplexing within the same PRB and transmitting more than 2 bits of UCI. In other words, PUCCH resources in PUCCH format 3 do not include OCC. Modulation symbols and DMRS are transmitted in TDM.

[0165] PUCCH format 4 supports multiplexing of up to four UEs within the same PRB and transmits more than 2 bits of UCI. In other words, PUCCH resources in PUCCH format 3 include OCC. Modulation symbols and DMRS are transmitted in TDM.

[0166] 1.4. Cellular Search

[0167] Figure 5 This is a diagram illustrating the various embodiments of the present disclosure to which the Synchronization Signal Block (SSB) structure can be applied.

[0168] The UE can perform cell search, system information acquisition, beam alignment for initial access, DL measurements, etc., based on the SSB. The terms SSB and Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block are used interchangeably.

[0169] Reference Figure 5 The SSB comprises the PSS, SSS, and PBCH. The SSB consists of four consecutive OFDM symbols, with the PSS, PBCH, SSS / PBCH, and PBCH transmitted within each OFDM symbol. The PSS and SSS each consist of one OFDM symbol multiplied by 127 subcarriers, while the PBCH consists of three OFDM symbols multiplied by 576 subcarriers. Polar coding and QPSK are applied to the PBCH. The PBCH includes data REs and demodulation reference signals (DMRS) REs in each OFDM symbol. Each RB has three DMRS REs, and there are three data REs between every two adjacent DMRS REs.

[0170] Cell search is the process of obtaining a cell's time / frequency synchronization and detecting its identifier (ID) (e.g., Physical Cell ID (PCID)). The PSS is used to detect cell IDs within a cell ID group, while the SSS is used to detect cell ID groups. The PBCH is used to detect the SSB (Time) index and half-frames.

[0171] The UE's cell search process can be summarized in Table 8.

[0172] [Table 8]

[0173]

[0174]

[0175] There can be 336 cell ID groups, each containing three cell IDs. A total of 1008 cell IDs can be generated. Information about the cell ID group to which a cell ID belongs can be obtained via the cell's SSS (Social Security Service), and information about the cell IDs within the 336 cells in the cell ID group can be obtained via the PSS (Position Support Service).

[0176] Figure 6 These are exemplary SSB transmission methods to which various embodiments of this disclosure can be applied.

[0177] Reference Figure 6 The SSB (Secondary Subscriber Bus) is transmitted periodically according to the SSB periodicity. The basic SSB period assumed by the UE during the initial cell search is defined as 20ms. After cell access, the SSB period can be set to one of {5ms, 10ms, 20ms, 40ms, 80ms, 160ms} via the network (e.g., BS). An SSB burst set is configured at the beginning of the SSB period. The SSB burst set can be configured within a 5ms time window (i.e., half a frame), and the SSB can be repeated up to L times within the burst set. The maximum number of SSB transmissions L can be given according to the carrier's frequency band as follows. One time slot includes up to two SSBs.

[0178] -For frequency ranges up to 3GHz, L=4

[0179] -For the frequency range from 3GHz to 6GHz, L = 8

[0180] - For the frequency range from 6 GHz to 52.6 GHz, L = 64

[0181] The temporal positions of SSB candidates in the SS burst set can be defined according to the following SCS. Within the SSB burst set (i.e., half-frame), the temporal positions of SSB candidates are indexed from 0 to L-1 (SSB index) in chronological order.

[0182] - Case A: 15kHz SCS: The index of the first symbol of the candidate SSB is given as {2, 8} + 14*n, where n = 0, 1 for carrier frequencies below or equal to 3GHz; and n = 0, 1, 2, 3 for carrier frequencies from 3GHz to 6GHz.

[0183] - Case B: 30kHz SCS: The index of the first symbol of the candidate SSB is given as {4, 8, 16, 20} + 28*n, where n = 0 for carrier frequencies below or equal to 3 GHz, and n = 0, 1 for carrier frequencies from 3 GHz to 6 GHz.

[0184] - Case C: 30kHz SCS: The index of the first symbol of the candidate SSB is given as {2, 8} + 14*n, where n = 0 for carrier frequencies below or equal to 3 GHz, and n = 0, 1, 2, 3 for carrier frequencies from 3 GHz to 6 GHz.

[0185] - Case D: 120kHz SCS: The index of the first symbol of the candidate SSB is given as {4, 8, 16, 20} + 28*n, where for carrier frequencies above 6GHz, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18.

[0186] - Case E: 240kHz SCS: The index of the first symbol of the candidate SSB is given as {8, 12, 16, 20, 32, 36, 40, 44} + 56*n, where n = 0, 1, 2, 3, 5, 6, 7, 8 for carrier frequencies above 6 GHz.

[0187] 1.5. Beam Alignment

[0188] Figure 7 Exemplary multi-beam transmission of SSB that can be applied to various embodiments of this disclosure are illustrated.

[0189] Beam scanning refers to changing the beam (direction) of a radio signal over time at the transmit-receive point (TRP) (e.g., BS / cell) (hereinafter, the terms beam and beam direction are used interchangeably). SSBs can be transmitted periodically via beam scanning. In this case, the SSB index is implicitly linked to the SSB beam. The SSB beam can be changed based on the SSB (index) or on a group of SSBs (indexes). In the latter case, the same SSB beam is maintained within the group of SSBs (indexes). That is, the transmit (Tx) beam direction of the SSB is repeated over multiple consecutive SSBs. Depending on the carrier frequency band, the maximum allowed number of SSBs L in an SSB burst set is 4, 8, or 64. Therefore, the maximum number of SSB beams in an SSB burst set can also be given according to the carrier frequency band as follows.

[0190] - For frequency ranges up to 3 GHz, the maximum number of beams = 4

[0191] - For the frequency range of 3GHz to 6GHz, the maximum number of beams is 8.

[0192] - For the frequency range of 6 GHz to 52.6 GHz, the maximum number of beams is 64.

[0193] Without multi-beam transmission, the number of SSB beams is 1.

[0194] When a UE attempts initial access to a BS, it can align its beam with the base station based on the SSB. For example, the UE detects the SSB and then identifies the optimal SSB. Subsequently, the UE can send a RACH preamble in the PRACH resource linked / corresponding to the index (i.e., beam) of the optimal SSB. Even after initial access, the SSB can be used for beam alignment between the BS and the UE.

[0195] 1.6. Channel Measurement and Rate Matching

[0196] Figure 8 This is a diagram illustrating exemplary methods for instructing the actual transmission of SSB, SSB_tx, which can be applied to various embodiments of this disclosure.

[0197] Up to L SSBs can be transmitted in an SSB burst, and the actual number / location of SSBs transmitted can differ for each BS / cell. The actual number / location of SSBs transmitted is used for rate matching and measurement, and the following indicates information about the actual SSBs transmitted.

[0198] - Rate matching related: This information can be indicated by UE-specific RRC signaling or RMSI. UE-specific RRC signaling includes a complete bitmap (e.g., of length L) for FR1 and FR2. As shown, RMSI includes a complete bitmap for FR1 and a compressed bitmap for FR2. Specifically, information about the actual SSB transmitted can be indicated by a group bitmap (8 bits) + intra-group bitmap (8 bits). Resources (e.g., REs) indicated by UE-specific RRC signaling or RMSI can be reserved for SSB transmission, and SSB resources can be considered for rate matching of PDSCH / PUSCH.

[0199] - Measurement-related: In RRC connected mode, the network (e.g., BS) can indicate the set of SSBs to be measured during the measurement period. The SSB set can be indicated on a frequency layer basis. If no SSB set is indicated, the default SSB set is used. The default SSB set includes all SSBs within the measurement period. The SSB set can be indicated by a complete bitmap of RRC signaling (e.g., of length L). In RRC idle mode, the default SSB set is used.

[0200] 1.7. QCL (Quasi-common positioning or quasi-common positioning)

[0201] The UE can receive a list of up to M TCI state configurations to decode the PDSCH based on the detected PDCCH carrying DCI intended for the UE and a given cell. M depends on the UE's capabilities.

[0202] Each TCI state includes parameters for establishing a QCL relationship between one or two DL RS and PDSCH DMRS ports. The QCL relationship is established using the RRC parameter qcl-Type1 of the first DL RS and the RRC parameter qcl-Type2 of the second DL RS (if configured).

[0203] The QCL type for each DLRS is given by the parameter "qcl-type" contained in QCL-Info, and can have one of the following values.

[0204] - "QCL-Type A": {Doppler frequency shift, Doppler spread, average delay, delay spread}

[0205] - "QCL-TypeB": {Doppler shift, Doppler spread}

[0206] - "QCL-TypeC": {Doppler shift, average delay}

[0207] - "QCL-TypeD": {Space Rx parameter}

[0208] For example, when a target antenna port is used for a specific NZP CSI-RS, the corresponding NZP CSI-RS antenna port can be indicated / configured to be QCL with a specific TRS from the perspective of QCL-Type A, and indicated / configured to be QCL with a specific SSB from the perspective of QCL-Type D. Once this indication / configuration is received, the UE can use the Doppler value and delay value measured in the QCL-Type ATRS to receive the NZP CSI-RS, and apply the Rx beam for receiving the QCL-Type D SSB to receive the NZP CSI-RS.

[0209] 1.8. UL-DL Timing Relationship

[0210] Figure 9 This is a diagram illustrating exemplary UL-DL timing relationships that can be applied to various embodiments of this disclosure.

[0211] Reference Figure 9 Before the UE sends the DL radio frame corresponding to UL radio frame i, T TA =(N TA +N TA,offset )T c The transmission of UL frames begins at 1 second. However, for msgA transmissions on PUSCH, an exception is made using T. TA =0.

[0212] Each parameter can be defined as described in Table 9 below.

[0213] [Table 9]

[0214]

[0215] 2. Positioning

[0216] Location can be a process of determining the geographic location and / or speed of a UE based on measurements of radio signals. Clients associated with the UE (e.g., applications) can request location information, and location information can be reported to clients. Location information can be included in the core network or requested by clients connected to the core network. Location information can be reported in standard formats such as cell-based coordinates or geographic coordinates. This document may also report estimation errors of the UE's location and speed and / or the location method used for positioning.

[0217] 2.1. Positioning Protocol Configuration

[0218] Figure 10 This is a diagram illustrating exemplary positioning protocol configurations for UE positioning to which various embodiments of this disclosure can be applied.

[0219] Reference Figure 10 The LTE Positioning Protocol (LPP) can be used as a point-to-point protocol between a location server (E-SMLC and / or SLP and / or LMF) and a target device (UE and / or SET) to locate the target device based on positioning-related measurements obtained from one or more reference sources. The target device and the location server can exchange measurement and / or location information based on signal A and / or signal B via LPP.

[0220] NR Positioning Protocol a (NRPPa) can be used to exchange information between a reference source (access node and / or BS and / or TP and / or NG-RAN node) and a location server.

[0221] NRPPa can provide the following functions:

[0222] -E-CID location information transmission. This function allows the exchange of location information between the reference source and the LMF for E-CID positioning purposes.

[0223] - OTDOA Information Transfer. This function allows information to be exchanged between the reference source and the LMF for OTDOA positioning purposes.

[0224] - Report general error conditions. This feature allows you to report general error conditions, but specific error messages have not yet been defined for this feature.

[0225] 2.2. PRS in LTE systems

[0226] For such positioning, a Positioning Reference Signal (PRS) can be used. The PRS is a reference signal used to estimate the position of the UE.

[0227] For example, in an LTE system, PRS can be transmitted only in DL subframes configured for PRS transmission (hereinafter, "positioning subframes"). If both a Multimedia Broadcast Single Frequency Network (MBSFN) subframe and a non-MBSFN subframe are configured as positioning subframes, the OFDM symbols of the MBSFN subframe should have the same cyclic prefix (CP) as subframe #0. If only the MBSFN subframe is configured as the intra-cell positioning subframe, the OFDM symbols configured for PRS in the MBSFN subframe may have an extended CP.

[0228] The sequence of PRS can be defined by the following equation 1.

[0229] [Formula 1]

[0230]

[0231] In Equation 1, n s 1 represents the slot number in the radio frame, and l represents the OFDM symbol number in the slot. It is the maximum value in the DL bandwidth configuration, and is expressed as This indicates the size of the RB in the frequency domain, for example, 12 subcarriers.

[0232] c(i) represents a pseudo-random sequence and can be initialized according to Equation 2 below.

[0233] [Equation 2]

[0234]

[0235] Unless configured additionally by higher-level units, otherwise equal And for normal CP, N CP The value is 1, while for extended CP, N is 1. CP is 0.

[0236] Figure 11 An exemplary pattern to which the PRS is mapped in a subframe is shown.

[0237] like Figure 11 As shown, PRS can be transmitted through antenna port 6. Figure 11 (a) illustrates the mapping of PRS in normal CP, while Figure 11 (b) illustrates the mapping of PRS in the extended CP.

[0238] PRS can be transmitted in consecutive subframes grouped for location estimation. These subframes are called location timings. A location timing can consist of 1, 2, 4, or 6 subframes. Location timings can occur periodically with a period of 160, 320, 640, or 1280 subframes. Cell-specific subframe offset values ​​can be defined to indicate the starting subframe for PRS transmission. The period and offset values ​​for location timings used for PRS transmission can be derived from the PRS configuration index as listed in Table 10 below.

[0239] [Table 10]

[0240]

[0241]

[0242] The PRS included in each positioning time is transmitted at constant power. The PRS in a given positioning time can be transmitted at zero power; this is called PRS muting. For example, when the PRS transmitted by the serving cell is muted, the UE can easily detect the PRS of neighboring cells.

[0243] The PRS silence configuration for a cell can be defined by a periodic silence sequence comprising 2, 4, 8, or 16 positioning opportunities. That is, depending on the positioning opportunity corresponding to the PRS silence configuration, the periodic silence sequence can include 2, 4, 8, or 16 bits, and each bit can have a value of "0" or "1". For example, PRS silence can be performed during a positioning opportunity with a bit value of "0".

[0244] The positioning subframe is designed as a low-interference subframe, meaning no data is transmitted within it. Therefore, although the PRS may interfere with the PRS of other cells, the PRS itself is not affected by data transmission.

[0245] 2.3UE Positioning Architecture in NR System

[0246] Figure 12 An architecture for a 5G system that can be applied to locate a UE connected to NG-RAN or E-UTRAN is illustrated.

[0247] Reference Figure 12The AMF can receive a request for location services associated with a specific target UE from another entity, such as a Gateway Mobile Location Center (GMLC), or the AMF itself can decide to initiate location services on behalf of a specific target UE. The AMF then forwards the request for location services to the Location Management Function (LMF). Upon receiving the request, the LMF can process it and return the processing result, including the estimated location of the UE, to the AMF. In cases where an entity other than the AMF, such as a GMLC, requests location services, the AMF can send the processing result received from the LMF to that entity.

[0248] Next-generation evolved NBs (ng-eNBs) and gNBs are NG-RAN network elements capable of providing location measurement results. ng-eNBs and gNBs can measure the radio signals of a target UE and transmit the measurement results to the LMF. ng-eNBs can control several TPs (such as remote radio head units or PRS-only TPs) to support E-UTRA PRS-based beacon systems.

[0249] The LMF connects to the Enhanced Serving Mobility Location Center (E-SMLC), which enables the LMF to access the E-UTRAN. For example, the E-SMLC can enable the LMF to support OTDOA, one of the positioning methods in the E-UTRAN, by using DL measurements obtained by the target UE through signals transmitted only by the PRS TP and / or eNB in ​​the E-UTRAN.

[0250] The Location Provider (LMF) can connect to the Secure User Plane Location Platform (SLP). The LMF can support and manage different location services for the target UE. The LMF can interact with the target UE's serving ng-eNB or serving gNB to obtain the UE's location measurements. For the target UE's positioning, the LMF can determine the positioning method based on the Location Service (LCS) client type, requested Quality of Service (QoS), UE positioning capabilities, gNB positioning capabilities, and ng-eNB positioning capabilities, and then apply these positioning methods to the serving gNB and / or serving ng-eNB. The LMF can determine additional information such as the accuracy of the target UE's location estimation and velocity. The SLP is the Secure User Plane Location (SUPL) entity responsible for positioning via the user plane.

[0251] The UE can use DL RS transmitted by NG-RAN and E-UTRAN to measure its location. DL RS transmitted from NG-RAN and E-UTRAN to the UE may include SS / PBCH blocks, CSI-RS, and / or PRS. The choice of which DL RS to use to measure the UE's location follows the configuration of LMF / E-SMLC / ng-eNB / E-UTRAN, etc. The UE's location can be measured using a RAT-independent scheme using different Global Navigation Satellite Systems (GNSS), Terrestrial Beacon Systems (TBS), WLAN access points, Bluetooth beacons, and sensors (e.g., barometric sensors) installed in the UE. The UE may also include an LCS application, or access an LCS application by communicating with the network it accesses or through another application included therein. The LCS application may include the measurement and computation functions required to determine the UE's location. For example, the UE may include an independent positioning function such as Global Positioning System (GPS) and report its location independently of NG-RAN transmissions. Such independently acquired positioning information can be used as supplementary information to the positioning information obtained from the network.

[0252] 2.4. UE positioning operation

[0253] Figure 13 An example implementation of a network for UE positioning is shown.

[0254] When the AMF receives a request for location services while the UE is in Connection Management (CM)-IDLE state, the AMF can request network-triggered services to establish a signaling connection with the UE and assign a specific service gNB or ng-eNB. Figure 9 This operation process has been omitted. In other words, in Figure 9 In this context, it can be assumed that the UE is in connected mode. However, while the positioning process is still in progress, the signaling connection can be released by the NG-RAN as a result of signaling and data inactivity.

[0255] Now, refer to Figure 9 The network operation process for UE location is described in detail below. In step 1a, a 5GC entity such as a GMLC can send a request to the serving AMF for location services to measure the location of the target UE. Here, even if the GMLC does not make a request for location services, the serving AMF can determine the need for location services to measure the location of the target UE according to step 1b. For example, the serving AMF can determine that it itself will perform location services to measure the UE's location for emergency calls.

[0256] In step 2, the AMF transmits the request for location services to the LMF. In step 3a, the LMF may initiate a location procedure with the serving ng-eNB or serving gNB to obtain location measurement data or location measurement auxiliary data. For example, the LMF may send a request for location-related information associated with one or more UEs to the NG-RAN, indicating the type of location information required and the associated QoS. The NG-RAN may then respond to the request by transmitting the location-related information to the LMF. In this case, when the requested location determination method is the Enhanced Cell ID (E-CID) scheme, the NG-RAN may transmit additional location-related information to the LMF in one or more NR Positioning Protocol A (NRPPa) messages. Here, "location-related information" may refer to all values ​​used for location calculation, such as actual location estimation information and radio measurements or location measurements. The protocol used in step 3a may be the NRPPa protocol, which will be described later.

[0257] Additionally, in step 3b, the LMF can initiate a location procedure for DL ​​positioning together with the UE. For example, the LMF can send location assistance data to the UE, or obtain location estimates or location measurement results. For example, in step 3b, a capability information transmission procedure can be performed. Specifically, the LMF can send a request for capability information to the UE, and the UE can send the capability information to the LMF. Here, the capability information may include information about the positioning methods supported by the LMF or UE, information about various aspects of a specific positioning method such as various types of assistance data for A-GNSS, and information about non-specific common characteristics of any positioning method such as the ability to handle multiple LPP transactions. In some cases, although the LMF does not send a request for capability information, the UE can provide capability information to the LMF.

[0258] As another example, in step 3b, a location-assisted data transmission procedure can be performed. Specifically, the UE can send a request for location-assisted data to the LMF and indicate to the LMF the specific location-assisted data required. The LMF can then transmit the corresponding location-assisted data to the UE, and additional auxiliary data to the UE in one or more Additional LTE Positioning Protocol (LPP) messages. The location-assisted data transmitted from the LMF to the UE can be transmitted unicast. In some cases, the LMF can transmit location-assisted data and / or additional auxiliary data to the UE without receiving a request for auxiliary data from the UE.

[0259] As another example, in step 3b, a location information transmission procedure can be performed. Specifically, the LMF can send a request for location (related) information associated with the UE to the UE, indicating the type of location information required and the associated QoS. In response to this request, the UE can transmit location-related information to the LMF. Additionally, the UE can transmit additional location-related information to the LMF in one or more LPP messages. Here, "location-related information" can refer to all values ​​used for location calculation, such as actual location estimation information and radio measurements or location measurements. Typically, location-related information can be a reference signal time difference (RSTD) value measured by the UE based on DL RS transmitted to the UE by multiple NG-RAN and / or E-UTRAN. Similar to the above description, the UE can transmit location-related information to the LMF without receiving a request from the LMF.

[0260] The procedures implemented in step 3b can be performed independently, but they can also be performed sequentially. While step 3b is typically performed in the order of capability information transmission, location-aided data transmission, and location information transmission, it is not limited to this order. In other words, step 3b does not need to occur in a specific order to improve positioning flexibility. For example, the UE can request location-aided data at any time to perform a previous request for location measurements made by the LMF. The LMF can also request location information such as location measurements or location estimates at any time if the location information sent by the UE does not meet the required QoS. Similarly, the UE can send capability information to the LMF at any time when it is not performing measurements for location estimation.

[0261] In step 3b, when the information or request exchanged between the LMF and the UE is incorrect, error messages can be sent and received, and abort messages for terminating positioning can be sent and received.

[0262] The protocol used in step 3b can be the LPP protocol, which will be described later.

[0263] Step 3b may be performed additionally after step 3a, but step 3b may be performed instead of step 3a.

[0264] In step 4, the LMF can provide a location service response to the AMF. The location service response may include information about whether the UE's location was successful, and includes an estimated location value for the UE. This is if the process has already been initiated via step 1a. Figure 9 In this process, AMF can transmit the location service response to a 5GC entity such as GMLC. If it has already been started via step 1b... Figure 9 In the process of responding to an emergency call, the AMF can use location services to provide location services related to the emergency call.

[0265] 2.5 Positioning Protocol

[0266] 2.5.1. LTE Positioning Protocol (LPP)

[0267] Figure 14 An exemplary protocol layer for supporting LPP message transmission between the LMF and the UE is illustrated. LPP Protocol Data Units (PDUs) can be carried in NAS PDUs between the AMF and the UE.

[0268] Reference Figure 14 The LPP terminates between the target device (e.g., the UE in the control plane or the SUPL-enabled terminal (SET) in the user plane) and the location server (e.g., the LMF in the control plane or the SLP in the user plane). LPP information can be carried as a transparent PDU across intermediate network interfaces using appropriate protocols such as NGAP via the NG-C interface and NAS / RRC via the LTE-Uu and NR-Uu interfaces. LPP is designed to enable positioning for both NR and LTE using various positioning methods.

[0269] For example, the target device and the location server can exchange capability information, auxiliary data for positioning, and / or location information between them via LPP. The target device and the location server can also exchange error information and / or indicate the termination of the LPP process via LPP messages.

[0270] 2.5.2 NR Positioning Protocol A (NRPPa)

[0271] Figure 15 An exemplary protocol layer is illustrated for supporting the transmission of NRPPa PDUs between LMF and NG-RAN nodes.

[0272] NRPPa can be used to carry information between NG-RAN nodes and LMFs. Specifically, NRPPa can carry E-CID for measurements transmitted from ng-eNB to LMF, data supporting the OTDOA positioning method, and cell ID and cell location ID supporting the NR cell ID positioning method. AMF can route NRPPa PDUs via the NG-C interface based on the routing ID of the involved LMF without information about the relevant NRPPa transaction.

[0273] NRPPa procedures for location and data collection can be divided into two types. The first type is a UE association procedure for transmitting information about a specific UE (e.g., location measurement information), and the second type is a non-UE association procedure for transmitting information applicable to NG-RAN nodes and associated TPs (e.g., gNB / ng-eNB / TP timing information). These two types can be supported independently or simultaneously.

[0274] 2.6 Positioning Measurement Method

[0275] Supported positioning methods in NG-RAN may include GNSS, OTDOA, E-CID, barometric pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS, and uplink time difference of arrival (UTDOA). Although any one of these positioning methods can be used for UE positioning, two or more positioning methods can be used.

[0276] 2.6.1 OTDOA (Observed Time Difference)

[0277] Figure 16 This is a diagram illustrating various implementation methods that can be applied to the Time Difference of Observation Achievement (OTDOA) localization method.

[0278] The OTDOA positioning method uses time measured from DL signals received by the UE from multiple TPs, including eNB, ng-eNB, and PRS-only TPs. The UE uses location-aided data received from a location server to measure the time of the received DL signals. The UE's location can be determined based on the geographic coordinates of neighboring TPs and the measurement results.

[0279] A UE connected to a gNB can request a measurement gap from a TP to perform OTDOA measurements. If the UE does not know the SFN of at least one TP in the OTDOA auxiliary data, the UE can use an autonomous gap to obtain the SFN of the OTDOA reference cell before requesting a measurement gap for performing Reference Signal Time Difference (RSTD) measurements.

[0280] Here, RSTD can be defined as the minimum relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell. That is, RSTD can be calculated as the relative time difference between the start time of a subframe received from the measurement cell and the start time of the subframe from the reference cell that is closest to the subframe received from the measurement cell. The reference cell can be selected by the UE.

[0281] For accurate OTDOA measurement, it is necessary to measure the Time of Arrival (TOA) of signals received from three or more geographically distributed TPs or BSs. For example, the TOA of each of TP 1, TP 2, and TP 3 can be measured, and the RSTD of TP 1 and TP 2, TP 2 and TP 3, and TP 3 and TP 1 can be calculated based on the three TOA values. A geometric hyperbola is determined based on the calculated RSTD values, and the intersection of the curves in the hyperbola can be estimated as the location of the UE. In this case, accuracy and / or uncertainty may occur for each TOA measurement, and depending on the measurement uncertainty, the estimated location of the UE can be known as a specific range.

[0282] For example, the RSTD of two TPs can be calculated based on Equation 3 below.

[0283] [Formula 3]

[0284]

[0285] In Equation 3, c is the speed of light, {x t ,y t} represents the (unknown) coordinates of the target UE, {x i ,y i {x1, y1} are the (known) coordinates of TP, and {x1, y1} are the coordinates of a reference TP (or another TP). Here, (T i -T1) is the transmission time offset between two TPs, known as the "real-time difference" (RTD), and n i n1 and n2 are the UE ToA measurement error values.

[0286] 2.6.2E-CID (Enhanced Cell ID)

[0287] In the Cell ID (CID) location method, the UE's location can be measured based on the geographic information of the UE's serving ng-eNB, serving gNB, and / or serving cell. For example, the geographic information of the serving ng-eNB, serving gNB, and / or serving cell can be obtained through paging, registration, etc.

[0288] In addition to the CID positioning method, the E-CID positioning method can also utilize additional UE measurements and / or NG-RAN radio resources to improve UE location estimation. Although the E-CID positioning method can partially utilize the same measurement methods as the measurement control system regarding the RRC protocol, additional measurements solely for UE location are typically not performed. In other words, additional measurement configuration or measurement control messages may not be provided for UE location measurement. The UE does not anticipate requesting additional measurement operations solely for location measurement, and the UE can report measurements obtained through normally measurable methods.

[0289] For example, the serving gNB can use E-UTRA measurements provided by the UE to implement the E-CID positioning method.

[0290] The measurement elements that can be used for E-CID positioning are, for example, as follows.

[0291] -UE Measurements: E-UTRA Reference Signal Received Power (RSRP), E-UTRA Reference Signal Received Quality (RSRQ), UE E-UTRA Receive (Rx) - Transmit (Tx) Time Difference, GERAN / WLAN Reference Signal Strength Indication (RSSI), UTRAN Common Pilot Channel (CPICH) Received Signal Code Power (RSCP), and / or UTRAN CPICH Ec / Io

[0292] -E-UTRAN Measurement: ng-eNB Rx-Tx Time Difference, Timing Advance (T) ADV ) and / or AoA.

[0293] Here, T ADV It can be divided into type 1 and type 2 as follows.

[0294] T ADV Type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0295] T ADV Type 2 = ng-eNB Rx-Tx time difference

[0296] AoA (Aspect-of-Arrival) can be used to measure the UE's orientation. AoA is defined as the estimated counter-clockwise angle of the UE from the eNB / TP. In this case, the geographic reference direction can be north. The eNB / TP can use UL signals such as SRS and / or DMRS for AoA measurement. The accuracy of AoA measurement increases with the arrangement of the antenna array. When the antenna array is arranged at equal intervals, the signals received at adjacent antenna elements can have a constant phase rotation.

[0297] 2.6.3 UTDOA (Uplink Time Difference of Arrival)

[0298] UTDOA is used to determine the UE's location by estimating the SRS arrival time. When the estimated SRS arrival time is calculated, the serving cell is used as a reference cell, and the UE's location can be estimated using the time difference with another cell (or eNB / TP). To implement UTDOA, the E-SMLC can indicate the serving cell of the target UE to indicate SRS transmissions to the target UE. The E-SMLC can provide configurations such as periodic / aperiodic SRS, bandwidth, and frequency / group / sequence hopping.

[0299] 2.6.4. Multiple RTTs (Multi-cell RTTs)

[0300] Compared to OTDOA positioning, which requires fine synchronization (e.g., on the nanosecond scale) between TPs in the network, RTT positioning only requires coarse timing TRP (e.g., BS) synchronization, although it is based on TOA measurements similar to those of OTDOA positioning.

[0301] Figure 17 This is a diagram illustrating exemplary multi-RTT positioning methods to which various embodiments of the present disclosure can be applied.

[0302] Reference Figure 17 (a) illustrates an RTT procedure in which the initiating and responding devices perform TOA measurements, and the responding device provides the TOA measurements to the initiating device for RTT measurement (calculation). For example, the initiating device may be a TRP and / or a UE, while the responding device may be a UE and / or a TRP.

[0303] In operation 1701 according to an exemplary embodiment, the initiating device may send an RTT measurement request, and the responding device may receive an RTT measurement request.

[0304] In operation 1703 according to an exemplary embodiment, the initiating device may send an RTT measurement signal at time t0, and the responding device may obtain a TOA measurement t1.

[0305] In operation 1705 according to an exemplary embodiment, the responding device may send an RTT measurement signal at time t2, and the initiating device may obtain a TOA measurement at t3.

[0306] In operation 1707 according to the exemplary embodiment, the responding device can send information about [t2-t1], and the initiating device can receive the corresponding information and calculate the RTT based on Equation 4 below. The corresponding information can be sent and received by a separate signal or in the RTT measurement signal of operation 1705.

[0307] [Formula 4]

[0308] RTT = t3 - t0 - [t2 - t1]

[0309] Reference Figure 17 (b) RTT can correspond to a dual-range measurement between two devices. Position estimation can be performed based on the corresponding information, and multilateration can be used for position estimation. d1, d2, and d3 can be determined based on the measured RTT, and the position of the target device can be determined as the intersection of the circumferences of circles centered on BS1, BS2, and BS3 (or TRP) with radii of d1, d2, and d3, respectively.

[0310] 3. Various embodiments of this disclosure

[0311] The various embodiments of this disclosure will be described in detail below based on the above-described technical concept. Clauses 1 and 2 can be applied to various embodiments of this disclosure. For example, operations, functions, and terms not defined in various embodiments of this disclosure can be performed and described based on Clauses 1 and 2.

[0312] The symbols / abbreviations / terms used in the following descriptions of various embodiments of this disclosure are described below.

[0313] -AOA (AoA): Angle of Arrival

[0314] -CSI-RS: Channel State Information Reference Signal

[0315] -ECID: Enhanced Cell Identifier

[0316] GPS: Global Positioning System

[0317] -GNSS: Global Navigation Satellite System

[0318] -LMF: Location Management Function

[0319] -NRPPa: NR positioning protocol

[0320] -OTDOA (OTDoA): Time Difference of Observation Arrival

[0321] -PRS: Positioning Reference Signal

[0322] -RAT: Radio Access Technology

[0323] -RS: Reference signal

[0324] -RTT: Round trip time

[0325] -RSRP: Reference Signal Received Power

[0326] -RSTD: Reference signal time difference / Relative signal time difference

[0327] -SRS: Probe Reference Signal

[0328] -SS: Synchronization signal

[0329] -SSB: Synchronization Signal Block

[0330] -SS / PBCH: Synchronization Signal / Physical Broadcast Channel

[0331] -TDOA (TDoA): Time Difference of Arrival

[0332] -TOA (ToA): Arrival Time

[0333] -TRP: Transmit / Receive Point (TP: Transmit Point)

[0334] -UTDOA (UTDoA): Uplink Time Difference of Arrival

[0335] 3.1. Configure the RE pattern for the SRS used for positioning.

[0336] Comb-N (comb-N) RE patterns can be supported for DL ​​PRS resources used for UE positioning to map DL PRS sequences to REs. Comb-N patterns can be shifted across symbols within DL-PRS resources.

[0337] According to this disclosure, UL RS (e.g., SRS) resources can be configured / indicated for UE positioning, similar to DL-PRS. In the following, SRS will be described as an example in this disclosure, but UL RS used for positioning can be used instead of the SRS of this disclosure. First, SRS configuration information related to SRS resources will be described. As SRS configuration information, SRS-Config IE can be used for SRS transmission configuration. The SRS configuration defines a list of SRS resources and a list of SRS resource sets. Each SRS resource set, including at least one SRS resource, defines a set of SRS resources. The network can use the configured aperiodicSRS-ResourceTrigger to trigger the transmission of the set of SRS resources. Table 11 below shows the information that can be included in the SRS-Config IE.

[0338] [Table 11]

[0339]

[0340]

[0341]

[0342]

[0343]

[0344]

[0345] Tables 12 through 16 below describe the information contained in Table 11.

[0346] [Table 12]

[0347]

[0348] Table 13

[0349]

[0350]

[0351] [Table 14]

[0352]

[0353]

[0354] [Table 15]

[0355]

[0356] SRS resources used for UE positioning can be configured / indicated as having cross-correlation and / or sidelobes, that is, having interleaved RE patterns with small side peaks. In the interleaved RE pattern, the individual symbols of the SRS resources can be configured as Comb-N type frequency RE patterns. In this disclosure, Comb-N or N-Comb is a comb-shaped frequency RE pattern or form, where N in Comb-N represents the comb size and can be set via RRC signaling. For example, N can be greater than or equal to 1 and can be set to any one of 2, 4, and 8, but is not limited thereto. In the Comb-N form with size N, SRS resource REs can be configured / indicated or allocated RE-by-RE for every N frequency REs in a symbol. Furthermore, in this disclosure, the comb offset represents the frequency RE offset value in a particular SRS symbol and can be from 0 to N-1. The comb offset can be used to determine the starting position in the frequency domain of at least one RE (e.g., an SRS RE) configured in the Comb-N form.

[0357] In short, the Comb-N form can be a pattern like this: based on a symbol, REs are assigned at intervals of N from the RE with the lowest frequency index (i.e., the starting position of the RE in the frequency domain).

[0358] Furthermore, in this disclosure, the comb-type can represent the various types that a set of SRS symbols with different comb offsets can have.

[0359] In SRS resources, different SRS symbols of the Comb-N form can have different comb offsets, i.e., frequency RE offsets. Therefore, for multiple SRS symbols, the SRS can be mapped to a larger number of subcarriers than the number of subcarriers the SRS is mapped to in a particular symbol. For example, in the case of Comb-2, different comb offsets are set for the two symbols, and thus only 6 subcarriers in the symbol are used for SRS mapping. However, considering both symbols, an interleaved RE pattern is formed using all 12 subcarriers.

[0360] As described above, in the case of SRS resources and / or SRS resource sets configured for UE positioning, a single SRS resource occupying multiple symbols can be configured in a Comb-N type frequency RE pattern in a specific symbol, and can be configured on several symbols as an interleaved frequency RE pattern with different comb offsets. In this case, various examples can be considered to reduce signaling overhead for backward compatibility and SRS resource configuration.

[0361] Example 1 in Section 3.1

[0362] According to Example 1 of this disclosure, the UE can use a comb offset (i.e., a frequency RE offset) set / indicated for each SRS resource as a reference offset (e.g., a comb offset for the first symbol of the configured SRS resource), and can set / indicate to the UE a relative comb offset for a Comb-N type frequency RE pattern configured in another symbol. Here, the comb offset used as a reference offset can be a single comb offset for which only one value is set / indicated. For relative comb offsets, one or more values ​​can be set / indicated.

[0363] For example, when SRS resources allocated to four OFDM symbols are configured / indicated in a Comb-4 configuration, the comb offset of the SRS resources can be indicated / set to 0 for the UE, and the relative comb offset and / or relative frequency RE offset can be indicated / set to 1 for a Comb-4 type frequency RE pattern configured in another symbol. Based on the set / indicated single comb offset and relative comb offset, the UE can identify the comb offset of the first symbol occupied by the SRS resources as 0, and the comb offsets of the second, third, and fourth symbols as 1, 2, and 3 (or 3, 2, 1), respectively. Additionally / alternatively, this setting / indication can be automatically recognized.

[0364] Alternatively, as another implementation of Example 1, based on the relative comb offset and comb offset values ​​indicated by RRC signaling (and / or set / indicated for the first symbol among the symbols allocated to the SRS resource), the comb offset value for each symbol, i.e., the starting position of the SRS RE in the frequency domain, can be indirectly set / indicated / determined via modulo operations. For example, when the frequency RE pattern of the SRS resource is configured / indicated as Comb-N, the comb offset for each symbol can be set / indicated via Equation 5 below.

[0365] [Formula 5]

[0366] (CombOffset+RelativeOffset(i))mod N

[0367] Here, CombOffset refers to the aforementioned comb offset value, RelativeOffset refers to the aforementioned relative comb offset value, and i is i∈{1,2,…}, which refers to the i-th symbol starting from the start symbol of the configured SRS resource. That is, the relative comb offset can be different among OFDM symbols. In other words, since the relative comb offset is set / indicated for Comb-N as described above, it can be considered to be obtained based on Comb-N and OFDM symbols.

[0368] CombOffset has a value set / indicated by the BS / location server. As mentioned above, it is the comb offset (i.e., frequency RE offset) for a specific symbol in the SRS, or a comb offset value set / indicated to determine the comb offset for each symbol. For example, CombOffset could be the comb offset value (frequency RE offset value) for the first or last OFDM symbol out of M (>=1) OFDM symbols allocated to a particular SRS resource. When CombOffset is the comb offset value for the first symbol, the comb offset for the first symbol can be determined as a separately set / indicated comb offset value (and / or a comb offset value set / indicated together with the SRS resource configuration).

[0369] When i = 1, the relative comb offset (i.e., RelativeOffset(i)) can be set / indicated or defined / treated as 0. Therefore, when the relative comb offset is set / indicated as L, the UE can recognize that starting from i = 2 (excluding the case of i = 1), the relative comb offset is indicated as L, 2L, 3L, etc. Here, L can be the relative comb offset value used for the second symbol. That is, in one implementation of this disclosure, the UE can be set / indicated only for the relative comb offset value used for the second symbol, and the relative comb offset values ​​used for the remaining symbols can be set / indicated indirectly based on this.

[0370] In other words, the BS / location server can assign a CombOffset and a RelativeOffset set / indicated in Equation 5 to the UE, and the UE can set / interpret the RelativeOffset for each symbol as a different value based on the index of the SRS symbol according to specific rules (e.g., interpreting the value obtained by taking one, two, three times, etc. of the set or indicated RelativeOffset value from the first symbol in the time domain as the relative comb offset value of each symbol).

[0371] Equation 5 can be represented as Equation 6 below.

[0372] [Formula 6]

[0373] (CombOffset+RelativeOffset×(l index -l start ))mod N=O Comb (l index )

[0374] Here, O COmb (l index () refers to a specific symbol index within an OFDM symbol set occupied by a specific SRS resource. index Comb offset (frequency RE offset), l start This refers to the index of the first OFDM symbol in the time domain that is the first OFDM symbol occupied by the SRS resource used for positioning within the time slot configured with PRS resources (i.e., SRS resources), and can be set / indicated to the UE by the BS / location server / LMF, and l index It refers to the index of the remaining OFDM symbols, excluding the first OFDM symbol, among the OFDM symbols occupied by the SRS resources used for positioning in the time slot where PRS resources (i.e., SRS resources) are configured.

[0375] As described above, the UE can determine / identify the comb offset for each symbol based on Equation 5 or Equation 6, according to the set / indicated comb offset value and the relative comb offset value.

[0376] For example, in the case of SRS resources configured / indicated in the form of Comb-4 across 4 symbols, when the comb offset for the first symbol is 3 and the relative comb offset for the second symbol is set / indicated to 1, the UE can identify the relative comb offsets for the third and fourth symbols as 2 and 3, respectively. Therefore, the comb offsets for each of the four symbols can be set / indicated as follows.

[0377] - Comb offset for the first symbol: 3

[0378] - Comb offset for the second symbol: 3 + 1 mod 4 = 0

[0379] - Comb offset for the third symbol: 3 + 2 mod 4 = 1

[0380] - Comb offset for the fourth symbol: 3 + 3 mod 4 = 2

[0381] Figure 18 An example of a Comb-4 type SRS resource mapping is illustrated according to the present disclosure.

[0382] Reference Figure 18 In each symbol, the RE can be mapped at intervals of comb size N (N=4) starting from the RE with comb offset values ​​(3, 0, 1, 2) that separate each symbol from the RE located at the beginning of the frequency domain.

[0383] Alternatively, as another implementation of Example 1, the SRS resource can be interleaved RE patterned using only a single comb offset (frequency RE offset) instead of using multiple frequency RE offset values ​​for multiple symbols. Therefore, signaling overhead can be reduced compared to indicating / setting the comb offset value for each symbol.

[0384] More specifically, for an SRS resource occupying M (>=1) OFDM symbols, the BS / location server / LMF sets / indicates only a single comb offset value for the UE. In this case, the comb offset value for OFDM symbols other than the specific OFDM symbol for which the comb offset is set / indicated can be set / indicated based on a specific function. Specifically, when setting / indicating the comb offset for the first OFDM symbol in the time domain for a single SRS resource occupying M OFDM symbols, the comb offset for the remaining M-1 OFDM symbols can be set / indicated based on a function defined by at least one of the following parameters.

[0385] - Comb offset value (frequency RE offset value) set / indicated for SRS resources;

[0386] - The comb size N is set / indicated for the SRS resource;

[0387] - The total number M of OFDM symbols occupied by SRS resources;

[0388] - Symbol index based on OFDM symbols occupied by SRS resources in the time slot.

[0389] More specifically, a specific OFDM symbol (with index l) for an SRS resource can be set / indicated based on a function defined by at least one of the following parameters. index The comb offset of the frequency RE pattern.

[0390] - Comb offset value (frequency RE offset value) set / indicated for SRS resources;

[0391] - The comb size N is set / indicated for the SRS resource;

[0392] - The total number M of OFDM symbols occupied by SRS resources;

[0393] - The index of the starting OFDM symbol of the SRS resource (i.e., the first OFDM symbol in the time domain among the OFDM symbols to which the SRS resource is mapped).

[0394] Furthermore, a function for determining the comb offset value is defined by example from Equation 7 or Equation 8 below.

[0395] [Formula 7]

[0396]

[0397] [Formula 8]

[0398]

[0399] Here, mod refers to the modulo operation, and O COmb (l index () refers to a specific symbol index within an OFDM symbol occupied by a specific SRS resource. index The comb offset (frequency RE offset) can be set by the BS / location server / LMF for the UE / indicated to the UE. start It is the index of the first OFDM symbol in the time domain that is the first OFDM symbol occupied by the SRS resource used for positioning in the time slot for configuring PRS resources (i.e., SRS resources), and can be set / indicated for the UE by the BS / location server / LMF, and l index This refers to the index of the remaining OFDM symbols, excluding the first OFDM symbol, among the OFDM symbols occupied by the SRS resources used for positioning in the time slot where PRS resources (i.e., SRS resources) are configured. N refers to the comb size, and M refers to the total number of OFDM symbols occupied by PRS resources (e.g., SRS resources) in the time slot. Refers to the largest integer not greater than A. It is the smallest integer not less than A.

[0400] Some modifications or applications of Example 1 in Section 3.1 may also be made within the scope of this disclosure.

[0401] Figure 19a and Figure 19b This is a flowchart illustrating an SRS resource transfer method for a BS / UE according to an example of this disclosure. It can be modified. Figure 19a and Figure 19b The order / steps in the sequence, and each step can be performed independently.

[0402] Reference Figure 19a In S1201a, the BS / location server can configure information about the SRS resources and / or SRS resource sets used for locating the UE. In S1203a, the BS / location server can set / indicate to the UE the comb size N, comb offset, and relative comb offset for each SRS resource. In S1205a, the BS / location server can receive SRS signals on the SRS resources and / or SRS resource sets configured for locating based on the configured / indicated information.

[0403] Reference Figure 19b In S1201b, the UE can receive information from the BS / location server regarding the SRS resources and / or SRS resource sets used for UE positioning. In S1203b, the UE can receive from the BS / location server the comb size N, comb offset, and relative comb offset set / indicated for each SRS resource. In S1205b, the UE can transmit SRS signals on the SRS resources and / or SRS resource sets configured for positioning based on the configured / indicated information.

[0404] Example 2 in Section 3.1

[0405] According to Example 2 in Section 3.1 of this disclosure, in order to use SRS with dedicated / predefined interleaved RE patterns for UE positioning, different interleaved RE patterns / types can be predefined or preconfigured according to the comb type, and a specific one of the predefined or preconfigured patterns / types can be configured for / indicated to the UE. For example, a specific pattern / type can be configured for / indicated to the UE based on an index.

[0406] Specifically, rules can be defined / configured for the UE to create different types of interleaved RE patterns for SRS resources used for UE positioning based on the Com-N type and / or the number of SRS symbols.

[0407] Figure 20 An example of an interlaced RE pattern / type in the Com-2 type according to the present disclosure is shown.

[0408] Reference Figure 20For example, when configuring Comb-2 type SRS symbols with a frequency RE pattern, one bit is needed per symbol and two bits are needed for both symbols to indicate the comb offset for each of the two symbols while the comb offset is set to either 0 or 1. Alternatively, the BS / location server can configure / indicate two different interleaved RE patterns / types for the two SRS symbols. In type 1, the comb offset is set to 0 and 1 for the two SRS symbols, respectively. In type 2, the opposite of type 1, the comb offset is set to 1 and 0 for the two SRS symbols, respectively. Therefore, instead of indicating the comb offset for each of the two symbols, one bit can be used to set / indicate the comb offset for both symbols to the UE.

[0409] Figure 21 An example of a Comb-4 type interlaced RE pattern / type is shown according to this disclosure.

[0410] Reference Figure 21 For example, when configuring Comb-4 type SRS symbols with a frequency RE pattern, the comb offset can be set to, for example, 0, 1, 2, or 3, and therefore, 2 bits are required for each symbol. That is, 4 symbols require 8 bits. Therefore, considering the need to configure a large number of UEs and / or multiple SRS resources and / or resource sets, the RRC signaling overhead may increase unnecessarily, and the RRC signaling overhead may become excessive. In this disclosure, four types can be defined or configured for SRS resources allocated to 4 symbols and mapped with a Comb-4 pattern, and one of the four types can be configured / indicated to the UE. The UE can use one of the configured / indicated types. Specifically, four types can be defined such that all resources are used orthogonally in terms of the utilization of time and frequency resources. That is, as Figure 21 As shown, four types can be defined such that at least one SRS RE is mapped to each subcarrier (e.g., 12 subcarriers) to which the SRS resource is mapped in each type. These types can be configured / indicated to the UE as SRS resource patterns. For example, the BS can not only indicate / configure information about the Comb-N and symbol count for a specific SRS resource to the UE, but also indicate / configure type information about the SRS resource pattern to the UE. An example of the comb offset for each interleaved RE pattern / type (out of the four interleaved RE patterns / types) based on the Comb-4 type can be given below.

[0411] - Comb offsets for each symbol in Type 1 (Interlaced RE Pattern #1): 0, 1, 2, 3;

[0412] - Comb offsets for each symbol in Type 2 (Interlaced RE Pattern #2): 1, 2, 3, 0;

[0413] - Comb offsets for each symbol in Type 3 (Interlaced RE Pattern #3): 2, 3, 0, 1;

[0414] - Comb offsets for each symbol in Type 4 (Interlaced RE Pattern 4): 3, 0, 1, 2.

[0415] Modifications / extensions of the above examples of this disclosure are also within the scope of this disclosure. For example, the comb offset of each symbol in each type may be defined or set to a value different from the value disclosed in the above examples, and therefore it should be considered that creating an interlaced RE pattern different from the interlaced RE pattern in the above examples is also within the scope of this disclosure.

[0416] Example 3 in Section 3.1

[0417] According to Example 3 in Section 3.1 of this disclosure, in order to configure / indicate to the UE one or more specific patterns among different interleaved RE patterns (in a set of Comb-N based interleaved RE patterns), SRS resource configuration parameters (e.g., RRC parameters) can be extended / applied / reused. For example, parameters / signaling for comb offset settings in the SRS resource configuration parameters can be extended / applied / reused. Additionally / alternatively, in order to allow the application / extension / reuse of SRS resource configuration parameters, for example, to allow parameters for comb offset settings to be used for configuring / indicating interleaved RE patterns, a set of interleaved RE patterns can be defined or configured in conjunction with the SRS resource configuration parameters. For example, different orthogonal interleaved RE patterns can be defined or configured to allow different UEs to use orthogonal time-frequency radio resources. In this case, the comb offset of a specific symbol in any interleaved RE pattern can be a value set / indicated by the BS, or operatively connected to it.

[0418] For example, when multiple interleaved RE patterns consisting of L (>=1) symbols are defined or configured, the interleaved RE patterns can be defined orthogonally according to time frequency. Therefore, the comb offset for a specific symbol can differ between different interleaved RE patterns. That is, if the interleaved RE patterns are different, the comb offset for a specific symbol can also be different. Therefore, the comb offset of the Com-N pattern for the first OFDM symbol of each interleaved RE pattern can be used as a representative comb offset for each interleaved RE pattern. In other words, a single comb offset set / indicated by the BS when configuring an SRS resource for the UE can be used as a representative comb offset for the interleaved RE pattern. Therefore, for an SRS resource configured for UE positioning (or an SRS resource set included in the SRS resource set configured for UE positioning), the UE can distinguish between multiple different interleaved RE patterns using the comb offset value set / indicated by the BS. For example, the UE can identify the comb offset value set / indicated for a specific SRS resource as the comb offset value for the first OFDM symbol in each interleaved RE pattern.

[0419] More specifically, when four interleaved RE patterns (a set of interleaved RE patterns) are defined / configured in an SRS resource consisting of four symbols based on the COMP-4 type, the UE can consider that the comb offset value set / indicated is configured for Comb-4 in the first SRS symbol in any of the interleaved RE patterns; and can also identify that a specific type of RE pattern has been configured / indicated based on that value.

[0420] For example, the following four types can be configured / indicated for the UE.

[0421] - Comb offsets for each symbol in Type 1 (Interlaced RE Pattern #1): 0, 1, 2, 3;

[0422] - Comb offsets for each symbol in Type 2 (Interlaced RE Pattern #2): 1, 2, 3, 0;

[0423] - Comb offsets for each symbol in Type 3 (Interlaced RE Pattern #3): 2, 3, 0, 1;

[0424] - Comb offsets for each symbol in Type 4 (Interlaced RE Pattern #4): 3, 0, 1, 2.

[0425] In this scenario, when the comb offset is set / indicated to 0 for the UE, the UE can identify / determine that the SRS resource's RE pattern (i.e., Comb-4) pattern is configured as type 1 because the type with a comb offset of 0 for the first symbol among the four interleaved RE patterns is type 1. Alternatively, when the comb offset is set / indicated to 2, the UE can identify / determine that the Comb-4 pattern is configured as a type 3 form where the comb offset of the first symbol is 2.

[0426] Alternatively, in this disclosure, for SRS resources used for UE positioning that are different from SRS resources used for purposes other than positioning, the Com-N type of the SRS resource and the number of symbols allocated to the SRS resource can be jointly configured / indicated.

[0427] For example, an SRS resource configured with a frequency RE pattern based on the Comb-N form can consist of N OFDM symbols corresponding to the comb size, and can be configured / indicated such that at least one SRS RE maps to each subcarrier to which the SRS resource is mapped (e.g., 12 subcarriers). For example, when the frequency RE pattern of a particular SRS resource is in the form of Comb-2, two symbols can be configured / indicated consecutively such that at least one SRS RE maps to each subcarrier in the RB. That is, when only the comb size N and the starting position of the symbol (SRS start symbol index) are set / indicated, the UE can implicitly recognize that an interleaved Comb-2 pattern is configured in two consecutive symbols starting from the starting position of the symbol. Here, the interleaved RE pattern can represent setting different comb offsets in the first and second symbols, as described above.

[0428] Some modifications or applications of Examples 2 and 3 in Section 3.1 of this disclosure may also be made within the scope of this disclosure.

[0429] Figure 22a and Figure 22b This is a flowchart illustrating a base station / UE SRS resource transmission method according to another example of this disclosure. Figure 22a and Figure 22b The order of the steps can be changed, and each step can be performed independently.

[0430] Reference Figure 22a In S1301a, the BS / location server can configure information about the SRS resources and / or SRS resource sets to be used for UE positioning. In S1303a, the BS / location server can generate an interleaved RE pattern based on the Com-N type of the SRS resources and / or the number of OFDM symbols allocated to the SRS resources, and configure / indicate it to the UE. In S1305a, the BS / location server can receive SRS signals on the SRS resources and / or SRS resource sets used for positioning based on the configured / indicated information.

[0431] Reference Figure 22bIn S1301b, the UE can receive information from the BS / location server regarding the SRS resources and / or SRS resource sets to be used for UE positioning. In S1303b, the UE can receive from the BS / location server a configuration / instruction for an interleaved RE pattern generated based on the Com-N type of the SRS resources and / or the number of OFDM symbols allocated to the SRS resources. In S1305b, the UE can transmit SRS signals on the SRS resources and / or SRS resource sets used for positioning based on the configured / instructed information.

[0432] 3.2. TX / RX Beam Configuration / Determination for NR Positioning

[0433] The SRS can be used as the uplink RS for UTDOA-based UE positioning. Specifically, regarding the UL SRS transmit power for positioning purposes, options 1 to 3 disclosed below can be considered.

[0434] - Option 1: The UL SRS transmit power can be constant (e.g., transmit power control may not be supported).

[0435] - Option 2: The UL SRS transmit power can be determined based on the existing power control scheme.

[0436] Option 3: UL SRS transmit power can be determined based on modifications to existing power control schemes. For example, DL RS for neighboring cells used to measure SRS path loss can be configured.

[0437] Alternatively, the number of SRS symbols used for positioning can be increased compared to {1, 2, 4}.

[0438] Alternatively, when the position of the SRS symbol used for positioning in each time slot is in the time domain from the last symbol to the preceding N symbols within the time slot, N can be greater than 6.

[0439] For UE positioning purposes, the BS can configure / instruct specific SRS resources to the UE. As an example, the BS can configure resources for the UE via RRC signaling associated with an SRS resource set (e.g., signaling indicating the use case of the SRS resource set). SRS resources used for UE positioning may have different characteristics than SRS resources used for other purposes.

[0440] Furthermore, to use UTDOA-based UE positioning technology, multiple TRPs and / or BSs (gNB / eNB, etc.) and / or Location Measurement Units (LMUs) are required to receive SRS transmitted by the UE. Therefore, unlike SRS transmissions performed by the UE targeting its serving cell / gNB / TRP, SRS needs to be transmitted to target neighboring cells / gNB / TRPs other than the serving cell / gNB / TRP. To this end, this document discloses various examples related to methods for configuring / indicating TX / RX beam scanning and for transmitting / receiving RS (resources) for positioning of the UE and BS / gNB / TRP.

[0441] Example 1 in Section 3.2

[0442] DL RS (e.g., PRS) resources for UE positioning can be transmitted from multiple cells / TRPs / gNBs (such as a reference cell (or serving cell) and neighboring cells). The UE needs to effectively receive DL RS transmitted from several cells / TRPs / gNBs. Depending on the UE's capabilities, when the UE receives multiple RS (e.g., PRS) resources simultaneously transmitted from multiple cells / gNBs / TRPs, it may be allowed to use multiple receive beams optimized for each transmitted DL RS resource. Therefore, in order to effectively receive RS resources (e.g., PRS resources) for positioning transmitted from two or more cells / gNBs / TRPs using a single receive beam, a receive beam optimized (i.e., non-sharp) for receiving multiple RS resources is required.

[0443] Therefore, in Example 1 of Section 3.2 of this disclosure, in order to effectively receive DL RS resources using a single or multiple RX beams for NR positioning purposes and / or transmit SRS resources and / or sets of SRS resources intended for multiple cells / gNB / TRPs via a single or multiple TX beams, the multiple DL RS resources transmitted from multiple cells can be used as a reference for the UE beam direction, i.e., a QCL source. The RS resources transmitted from each cell / gNB / TRP can be configured together with the corresponding cell / gNB / TRP information (e.g., TP / cell / gNB ID) and can be explicitly configured / indicated to the UE. Thus, for multiple RS resources configured as spatial QCL-D sources for a specific SRS resource, the UE can identify the TP / TRP / cell to which each RS resource is linked.

[0444] In other words, multiple RS resources (e.g., PRS / CSI-RS / SSB) and / or a specific RS group (e.g., consisting of CSI-RS resources and SSB resources transmitted from multiple cells / TRP / BS) can be configured as a QCL-D source for a specific SRS resource of the UE. That is, DL RS can be used as a QCL-D source for a specific SRS resource in order to serve as a reference for determining the receive beam direction.

[0445] Furthermore, in order for the UE to transmit specific SRS resources to two or more target cells / gNB / TRPs, the BS / LMF may need to provide reference information for configuring (for UE positioning purposes) the transmission direction of specific SRS resources and / or SRS resource sets configured for a cell / gNB / TRP or a specific UE. To this end, the BS / LMF can configure / indicate RS resources transmitted from different cells / gNB / TRPs as spatial QCL references for specific SRS resources and / or SRS resource sets (configured for UE positioning) for a specific UE. That is, multiple RS resources transmitted by multiple cells / gNB / TRPs can be configured / indicated as QCL-D sources for specific SRS resources. In this case, RS resources transmitted by different cells / gNB / TRPs can be configured in association with a specific TRP / cell / gNB explicitly configured / indicated to the UE.

[0446] For example, the wireless network (BS / LMF / location server) can indicate / configure RS resource 1 (e.g., SSB / CSI-RS / PRS resource #1) transmitted from cell / gNB / TRP #1 and RS resource #2 (e.g., SSB / CSI-RS / PRS resource #2) transmitted from cell / gNB / TRP #2 as reference information for transmitting (locating) one or more specific UL-PRS (e.g., SRS) resources configured for UE positioning. That is, the QCL-D source for one or more UL-PRS (e.g., SRS) resources can be configured / indicated.

[0447] Example 2 in Section 3.2

[0448] According to Example 2 in Section 3.2 of this disclosure, DL RS resources and / or DLRS resource sets transmitted from a single TRP / cell / gNB can be used as reference information for TX / RX beams transmitted from an SRS resource set containing one or more SRS resources. Specifically, configuration / indication may be permitted to a limited extent under the following conditions.

[0449] - Only when UL RS (e.g., SRS) resources are configured for UE positioning can the DLRS resources and / or DLRS resource sets transmitted from a single TRP / cell / gNB be configured / indicated as reference information for the TX / RX beams used to transmit the SRS resource sets. For example, this could be a case where the SRS resource set is specified / configured by the BS for UE positioning.

[0450] - All ULRS (e.g., SRS) resources can be defined / configured for the same transmit antenna port. That is, ULRS resources can be transmitted based on the same beam and have the same TX antenna port. Additionally, ULRS resources can be configured / defined / indicated for UE positioning.

[0451] The BS / LMF / location server can configure / indicate to the UE specific DLRS (e.g., SSB, CSI-RS, PRS) resources transmitted from a specific cell / gNB / TRP as reference beam direction information for transmitting a specific SRS resource set and / or SRS resources (configured for UE positioning). For example, an SSB (or SS / PBCH block) configured for L1-RSRP and / or L3-RSRP measurements can be configured / indicated as reference beam direction information for SRS resource transmission. The UE can measure RSRP / SINR / SNR, etc., for SSB resources transmitted from neighboring cells / gNB / TRPs, and the BS can instruct / configure to report SSB resource information with the largest measured value to the BS or LMF. Therefore, based on the SSB resource information reported by the UE (e.g., SSB resource index, etc.), the BS / LMF can configure / indicate to the UE the SSB resource that is measured as the largest as the QCL-D source for a specific SRS resource and / or SRS resource set. Alternatively, SSB resource information can be provided to the UE as reference information for the UE to transmit the TX beam direction of a specific SRS resource and / or SRS resource set.

[0452] When transmitting multiple SRS resources (configured for UE positioning) included in an SRS resource set, the UE can transmit SRS while performing TX beam scanning within a specific angle / area based on the direction of the already received SSB resources. The cell / gNB / TRP / LMU, acting as the receiving terminal, selects the SRS resource corresponding to the minimum Time-of-Flight (ToF) / ToA / propagation time among the measurements acquired from the multiple SRS resources transmitted by the UE, and can indicate the index of the selected / determined SRS resource to the UE. Then, based on the indicated SRS resource index, the UE can determine the receive beam direction for receiving PRS from the TRP / cell / gNB, and subsequently determine the transmit beam direction to be used in later SRS transmissions. In other words, by indicating a specific SSB resource to the UE as reference information for determining the transmit beam of an SRS resource set including one or more specific SRS resources, and by determining the transmit / receive beam pair corresponding to the minimum ToF / ToA / propagation time based on the indicated resource, RSTD measurements can be performed more accurately.

[0453] Figure 23 A beam scanning example according to this disclosure is illustrated.

[0454] Reference Figure 23 The DL RS resources #1 and #2 transmitted from gNB1 and gNB2 respectively are configured / indicated as QCL-D sources for UL RS resource set #1 and UL RS resource set #2 for UE#1. In this case, when the UE transmits multiple RS resources included in UL RS resource set #1, the direction towards gNB2 can be excluded from the TX beam scanning range. That is, when there is no QCL-D source, UE#1 needs to transmit SRS resources while performing beam scanning in all directions. Therefore, more efficient beam scanning can be achieved.

[0455] Example 3 in Section 3.2

[0456] According to Example 3 in Section 3.2 of this disclosure, a single DL RS resource transmitted from a specific cell / gNB / TRP can be configured / indicated by the BS as a resource having a spatial QCL relationship with multiple UL RS (e.g., SRS, UL-PRS) resources and / or a single SRS resource set. That is, a DL RS resource transmitted from a specific cell / gNB / TRP can be configured / indicated as a QCL-D source of multiple UL RS (e.g., SRS, UL-PRS) resources and / or a single SRS resource set. Additionally, multiple DL RS resources transmitted from multiple TRPs / gNBs / cells can be configured / indicated as QCL-D sources of multiple UL RS (e.g., SRS, UL-PRS) resources and / or a single SRS resource set. Furthermore, this configuration / indication can only be performed under the following limiting conditions.

[0457] - The spatial QCL relationship between a single DLRS resource transmitted from a specific cell / gNB / TRP and multiple ULRS (e.g., SRS, UL-PRS) resources and / or a single SRS resource set can only be configured / indicated to a limited extent when the UL RS resource is configured for UE positioning.

[0458] - All UL RS (e.g., SRS) resources can be defined / configured for the same transmit antenna port. That is, they can have the same beam and the same TX antenna port. Additionally, UL RS resources can be configured / defined / indicated for UE positioning.

[0459] For example, when a target UE that needs to estimate its location intends to send an SRS to a specific TRP / gNB / cell, due to the long distance between the specific TRP / gNB / cell and the target UE, it may be necessary to repeatedly send the SRS assumed to be sent through a specific transmit antenna port. Therefore, it is advisable to define / configure conditions for all UL RS resources for the same transmit antenna port. This improves audibility and provides a more accurate measurement of the Time of Arrival (ToA) (or Relative Time of Arrival (RToA)) for the specific receiving terminal's TRP / gNB / cell.

[0460] Example 4 in Section 3.2

[0461] According to Example 4 in Section 3.2 of this disclosure, the UE can receive configuration / instructions for SRS resources and / or SRS resource sets (e.g., SRS for UTDOA) for UE positioning purposes from the network (BS and / or LMF (or location server)). In this case, the OFDM symbols and transmit power (or parameters related to transmit power control) for transmitting SRS resources can be configured / instructed jointly.

[0462] For example, the SRS resources configured / indicated to the UE by the BS for UE positioning and / or the SRS resources included in the SRS resource set configured for UE positioning can be configured to always occupy all OFDM symbols included in the time slots in which the SRS resources and / or the SRS resource set are transmitted, and can be configured / indicated to transmit SRS in all symbols at the maximum transmit power allowed by the UE. That is, the time slots in which SRS is transmitted for UE positioning can be used as dedicated time slots (dedicated time and frequency resources) for SRS transmission.

[0463] Alternatively, the BS can configure / instruct that, among the SRS resources included in the SRS resource set configured for UE positioning, SRS resources intended to be transmitted to the serving cell / TRP / gNB use preset or predefined UL power control (e.g., see 3GPP TS 38.213, etc.), and SRS resources intended to be transmitted to neighboring cells / TRPs / gNBs always use the maximum power available to the UE. Here, the SRS (SRS resources and / or SRS resource sets) intended to be transmitted to the serving cell / TRP / gNB and the SRS intended to be transmitted to the serving cell / TRP / gNB can be identified by the BS / LMF in conjunction with the QCL information regarding DL RS resources indicated / configured by a specific TRP / cell / gNB.

[0464] Alternatively, the UE can be configured / indicated to multiple DL RS resources and / or resource sets as QCL sources (e.g., QCL-D sources) for a specific UL RS (e.g., SRS) resource. The UE can calculate path losses for the multiple indicated / configured DLRS resources to determine the transmit power used to transmit the specific UL RS resource, and determine the specific SRS transmit power based on the calculation results. For example, since multiple RS resources are transmitted from different TRPs / cells / gNBs, the UE can take the average of the path loss values ​​for the multiple RS resources and determine the transmit power used for SRS transmission based on the RS resource exhibiting the maximum path loss. Additionally, the BS / LMF can configure / indicate this operation for the UE.

[0465] In other words, a specific SRS resource set configured for UE positioning and / or the SRS resources included in that specific SRS resource set can have multiple RSs (RS resources) transmitted from multiple cells / gNB / TRPs as QCL sources. The BS can provide the UE with configuration / instructions to measure the path loss of the multiple RS resources configured / instructed as QCL sources for a specific SRS resource, and the UE determines the transmit power for the SRS resource based on the measured values. That is, the spatial QCL configuration between DLRS and UL RS and the power control for UL RS can be jointly configured / instructed to the UE by the BS.

[0466] Modifications or applications of the various examples in Section 3.2 of this disclosure may also be made within the scope of this disclosure.

[0467] Figure 24a and Figure 24b This is a flowchart illustrating a base station / UE SRS resource transmission method according to another example of this disclosure.

[0468] Reference Figure 24a In S1401a, the BS / location server can configure information about RS resources and / or RS resource sets for the UE. For example, RS can be SRS used for positioning. In S1403a, the BS / location server can configure / instruct the UE on the QCL relationship between DLRS resources and / or DL ​​RS resource sets and UL RS resources and / or UL RS resource sets configured for UE positioning, and information about power control. In S1305a, based on the configured / instructed information, the BS / location server can transmit DL RS resources and / or DL ​​RS resource sets, configure / instruct the transmission of UL RS resources and / or UL RS resource sets, or receive SRS signals on UL RS resources and / or UL RS resource sets.

[0469] Reference Figure 24b In S1401b, the UE can receive information from the BS / location server regarding RS resources and / or RS resource sets. For example, the RS can be an SRS used for positioning. In S1403b, the UE can receive from the BS / location server configuration / instructions regarding the QCL relationship between DL RS resources and / or DLRS resource sets and UL RS resources and / or UL RS resource sets configured for UE positioning, as well as information regarding power control. In S1305b, based on the configured / instructed information, the UE can receive DLRS resources and / or DL ​​RS resource sets, can receive configuration / instructions for the transmission of UL RS resources and / or UL RS resource sets, or can transmit SRS signals on UL RS resources and / or UL RS resource sets.

[0470] Figure 25 This is a flowchart illustrating an example of a UL RS transmission method for a UE according to this disclosure.

[0471] Reference Figure 25 In S2010, the UE can receive uplink reference signal (UL RS) configuration information.

[0472] In S2030, the UE can transmit UL RS on UL RS resources configured based on ULRS configuration information, wherein the ULRS resources may include at least one resource element (RE). Here, at least one RE may be configured as N-Comb in the frequency domain, and the starting position of each of the at least one RE in the frequency domain may be determined based on the comb offset and preset offset included in the UL RS configuration information. The preset offset may be obtained based on the N-Comb and at least one orthogonal frequency division multiplexing (OFDM) symbol of the at least one RE, where N may be a natural number.

[0473] For example, based on UL RS configured for positioning, the preset offset can be different between at least one OFDM symbol.

[0474] For example, each of at least one RE can be configured in the frequency domain in ascending order, starting from the first position and spaced N apart.

[0475] For example, the starting position in the frequency domain of each of at least one RE can be determined based on a modulo-N operation performed on the value obtained by adding the comb offset and the preset offset.

[0476] For example, UL RS configuration information can be received from higher levels.

[0477] For example, the transmit power for a UL RS can be determined based on the path loss measured from an RS configured as Quasi-Co-location (QCL) type D.

[0478] For example, the UL RS can be a probe reference signal (SRS).

[0479] Figure 26 This is a flowchart illustrating an example of a UL RS receiving method for a TP according to this disclosure.

[0480] Reference Figure 26 In S2110, the TP can send uplink reference signal (UL RS) configuration information.

[0481] In S2130, the TP can transmit UL RS on UL RS resources configured based on ULRS configuration information, wherein the ULRS resources may include at least one resource element (RE). Here, at least one RE is configured as N-Comb in the frequency domain, and the starting position of each of the at least one RE in the frequency domain can be determined based on the comb offset and preset offset included in the UL RS configuration information. The preset offset can be obtained based on the N-Comb and at least one orthogonal frequency division multiplexing (OFDM) symbol for the at least one RE, where N can be a natural number.

[0482] More specific operations of the UE and / or TP and / or location server according to the various embodiments described above in accordance with this disclosure can be described and performed based on the descriptions in Clauses 1 to 3.

[0483] Examples of the methods proposed above may also be included as one of the various embodiments of this disclosure, and thus can be considered as some of the proposed methods. Although the proposed methods can be implemented independently, some of the proposed methods can be combined (or merged). It may be specified that information indicating whether to apply the proposed methods (or information about the rules regarding the proposed methods) is indicated by the BS through signals predefined for the UE (e.g., physical layer signals or higher layer signals).

[0484] 4. Exemplary configurations of apparatuses for implementing various embodiments of the present disclosure

[0485] 4.1. Exemplary configurations of apparatuses applying various embodiments of the present disclosure

[0486] Figure 27 This is a diagram illustrating an apparatus for implementing various embodiments of the present disclosure.

[0487] Figure 27 The device shown may be a UE and / or BS (e.g., eNB or gNB) suitable for performing the above mechanism, or any device that performs the same operation.

[0488] Reference Figure 27 The device may include a digital signal processor (DSP) / microprocessor 210 and a radio frequency (RF) module (transceiver) 235. The DSP / microprocessor 210 is electrically connected to and controls the transceiver 235. Depending on the designer's choice, the device may also include a power management module 205, a battery 255, a display 215, a keypad 220, a SIM card 225, a memory device 230, an antenna 240, a speaker 245, and an input device 250.

[0489] Specifically, Figure 27 An example of a UE may include a receiver 235 configured to receive request messages from the network and a transmitter 235 configured to send timed transmit / receive timing information to the network. These receivers and transmitters may form a transceiver 235. The UE may also include a processor 210 coupled to the transceiver 235.

[0490] also, Figure 27 Examples of network devices may include a transmitter 235 configured to send a request message to a UE and a receiver 235 configured to receive timing transmission / reception information from the UE. These transmitters and receivers may form a transceiver 235. The network may also include a processor 210 coupled to the transceiver 235. The processor 210 may calculate latency based on the transmission / reception timing information.

[0491] The processors in the UE (or communication device included in the UE) and BS (or communication device included in the BS) according to various embodiments of this disclosure can operate as follows while controlling the memory.

[0492] According to various embodiments of this disclosure, a UE or BS may include at least one transceiver, at least one memory, and at least one processor coupled to the at least one transceiver and the at least one memory. The at least one memory may store instructions that cause the at least one processor to perform the following operations.

[0493] The communication device included in the UE or BS can be configured to include at least one processor and at least one memory. The communication device can be configured to include at least one transceiver, or it can be configured to not include at least one transceiver but be connected to at least one transceiver.

[0494] According to various examples of this disclosure, at least one processor included in the UE (or at least one processor included in a communication device in the UE) can receive uplink reference signal (UL RS) configuration information.

[0495] According to various examples of this disclosure, at least one processor included in a UE can transmit ULRS on ULRS resources configured based on ULRS configuration information, wherein the ULRS resources may include at least one resource element (RE).

[0496] For example, at least one RE can be configured as N-Comb in the frequency domain, and the starting position of each of the at least one RE in the frequency domain can be determined based on the comb offset and preset offset included in the UL RS configuration information.

[0497] For example, a preset offset can be obtained based on N-Comb and at least one orthogonal frequency division multiplexing (OFDM) symbol for at least one RE, where N can be a natural number.

[0498] For example, based on UL RS configured for positioning, the preset offset can be different between at least one OFDM symbol.

[0499] For example, each of at least one RE can be configured in the frequency domain in ascending order, starting from the first position and spaced N apart.

[0500] For example, the starting position in the frequency domain of each of at least one RE can be determined based on a modulo-N operation performed on the value obtained by adding the comb offset and a preset offset.

[0501] For example, UL RS configuration information can be received from higher levels.

[0502] For example, the transmit power for a UL RS can be determined based on the path loss measured from an RS configured as Quasi-Co-location (QCL) type D.

[0503] For example, the UL RS can be a probe reference signal (SRS).

[0504] According to various examples of this disclosure, at least one processor included in a BS (or at least one processor included in a communication device in a BS) can transmit uplink reference signal (UL RS) configuration information.

[0505] According to various examples of this disclosure, at least one processor included in a BS can receive ULRS on ULRS resources configured based on ULRS configuration information, wherein the ULRS resources may include at least one resource element (RE).

[0506] For example, at least one RE can be configured as N-Comb in the frequency domain, and the starting position of each of the at least one RE in the frequency domain can be determined based on the comb offset and preset offset included in the UL RS configuration information.

[0507] For example, a preset offset can be obtained based on at least one orthogonal frequency division multiplexing (OFDM) symbol of N-Comb and at least one RE, where N can be a natural number.

[0508] More specific operations of the processors included in the UE and / or BS and / or location server according to the various embodiments described above in accordance with this disclosure can be described and performed based on the descriptions in Clauses 1 to 3.

[0509] Unless they contradict each other, the various embodiments of this disclosure can be combined to implement them. For example, unless they contradict each other, the UE and / or BS and / or location server (including the processor therein) according to the various embodiments of this disclosure can be combined to implement the embodiments described in terms 1 to 3.

[0510] 4.2. Examples of communication systems applying various embodiments of the present disclosure

[0511] This specification has primarily described various embodiments of the present disclosure concerning data transmission and reception between a BS and a UE in a wireless communication system. However, the various embodiments of the present disclosure are not limited thereto. For example, the various embodiments of the present disclosure may also relate to the following technical configurations.

[0512] The various descriptions, functions, processes, proposals, methods and / or operation flowcharts of the various embodiments of this disclosure described in this document can be applied to, but are not limited to, various fields where wireless communication / connectivity (e.g., 5G) is required between devices.

[0513] The following description will be provided in more detail with reference to the accompanying drawings. In the following drawings / description, unless otherwise described, the same reference numerals may refer to the same or corresponding hardware blocks, software blocks, or functional blocks.

[0514] Figure 28 Exemplary communication systems applying various embodiments of the present disclosure are illustrated.

[0515] Reference Figure 28 The communication system 1 applied to various embodiments of this disclosure includes wireless devices, base stations (BS), and networks. Here, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. Wireless devices may include, but are not limited to, robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, Internet of Things (IoT) devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of performing communication between vehicles. In this document, vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices can include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and can be implemented as head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices can include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses) and computers (e.g., laptops). Home appliances can include TVs, refrigerators, and washing machines. IoT devices can include sensors and smart meters. For example, the BS and network can be implemented as wireless devices, and a particular wireless device 200a can operate as a BS / network node relative to other wireless devices.

[0516] Wireless devices 100a to 100f can connect to network 300 via BS200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS200 / network 300, wireless devices 100a to 100f can also perform direct communication with each other without going through the BS / network (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0517] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS200 or between BS200 / BS200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR), such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, Integrated Access Backhaul (IAB)). Wireless devices and BS / wireless devices can transmit / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals via various physical channels. To this end, at least a portion of various configuration information configuration processes, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for transmitting / receiving radio signals can be performed based on various proposals of various embodiments of this disclosure.

[0518] 4.2.1 Examples of wireless devices applying various embodiments of the present disclosure

[0519] Figure 29 Exemplary wireless devices to which various embodiments of this disclosure can be applied are illustrated.

[0520] Reference Figure 29 The first wireless device 100 and the second wireless device 200 can transmit radio signals via various RATs (e.g., LTE and NR). In this document, {first wireless device 100 and second wireless device 200} can correspond to... Figure 28 The {Wireless Device 100x and BS200} and / or {Wireless Device 100x and Wireless Device 100x}.

[0521] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. For example, the processors 102 may process information in the memories 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal via the transceivers 106. The processors 102 may receive a radio signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memories 104. The memories 104 may be connected to the processors 102 and may store various information related to the operation of the processors 102. For example, memory 104 may store software code including commands for executing part or all of a process controlled by processor 102 or for executing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. In this document, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each of transceivers 106 may include a transmitter and / or a receiver. Transceivers 106 may be used interchangeably with radio frequency (RF) units. In various embodiments of this disclosure, a wireless device may represent a communication modem / circuit / chip.

[0522] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processors 202 may process information in the memories 204 to generate a third message / signal, and then transmit a radio signal including the third message / signal via the transceivers 206. The processors 202 may receive a radio signal including a fourth message / signal via the transceivers 206, and then store the information obtained by processing the fourth message / signal in the memories 204. The memories 204 may be connected to the processors 202 and may store various information related to the operation of the processors 202. For example, the memories 204 may store software code including commands for performing part or all of the processes controlled by the processors 202 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. In this document, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each of transceivers 206 may include a transmitter and / or a receiver. Transceivers 206 may be used interchangeably with radio frequency (RF) units. In various embodiments of this disclosure, a wireless device may represent a communication modem / circuit / chip.

[0523] The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by (but are not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, in accordance with the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) from one or more transceivers 106 and 206, and acquire PDUs, SDUs, messages, control information, data, or information, in accordance with the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document.

[0524] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to perform the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document may be implemented using firmware or software in the form of code, commands, and / or sets of commands.

[0525] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0526] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operating procedures of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive radio signals. For example, one or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational procedures disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing by one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc., processed by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0527] According to various embodiments of the present disclosure, one or more memories (e.g., 104 or 204) may store instructions or programs that, when executed, cause one or more processors operatively coupled to one or more memories to perform operations according to various embodiments of the present disclosure or implementations of the present disclosure.

[0528] According to various embodiments of the present disclosure, a computer-readable storage medium may store one or more instructions or computer programs that, when executed by one or more processors, cause one or more processors to perform operations according to various embodiments of the present disclosure or implementations of the present disclosure.

[0529] According to various embodiments of the present disclosure, a processing apparatus or device may include one or more processors and one or more computer memories connected to the one or more processors. The one or more computer memories may store instructions or programs that, when executed, cause the one or more processors operatively connected to the one or more memories to perform operations according to various embodiments of the present disclosure or implementations of the present disclosure.

[0530] 4.2.2. Examples of wireless devices using various embodiments of the present disclosure

[0531] Figure 30 Other exemplary wireless devices applying various embodiments of this disclosure are illustrated. Wireless devices can be implemented in various forms depending on the use case / service (see [link]). Figure 28 ).

[0532] Reference Figure 30 Wireless devices 100 and 200 can correspond to Figure 28 The wireless devices 100 and 200 can be configured using various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include... Figure 29 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, transceiver 114 may include Figure 29 The device comprises one or more transceivers 106 and 206 and / or one or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, memory unit 130, and add-on components 140, and controls the overall operation of the wireless device. For example, control unit 120 may control the electrical / mechanical operation of the wireless device based on programs / code / commands / information stored in memory unit 130. Control unit 120 may transmit information stored in memory unit 130 to an external source (e.g., other communication devices) via wireless / wired interface through communication unit 110, or store information received from an external source (e.g., other communication devices) via wireless / wired interface through communication unit 110 in memory unit 130.

[0533] The add-on component 140 can be configured in various ways depending on the type of wireless device. For example, the add-on component 140 may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device can be implemented in, but is not limited to, the following forms: robot ( Figure 28 100a), vehicles ( Figure 28 100b-1 and 100b-2), XR device ( Figure 28 100c), handheld device ( Figure 28 100d), home appliances ( Figure 28 100e), IoT devices ( Figure 28 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, AI servers / devices ( Figure 28 400), BS ( Figure 28 (e.g., 200), network nodes, etc. Depending on the use case / service, wireless devices can be used in mobile or fixed locations.

[0534] exist Figure 30 In both wireless devices 100 and 200, all various elements, components, units / parts, and / or modules can be connected to each other via wired interfaces, or at least partially via wireless communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 can be wired together, and control unit 120 and first units (e.g., 130 and 140) can be wirelessly connected via communication unit 110. Each element, component, unit / part, and / or module within wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be constructed using a collection of one or more processors. As an example, control unit 120 may be constructed using a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. As another example, memory unit 130 may be configured using random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), flash memory, volatile memory, non-volatile memory, and / or combinations thereof.

[0535] The following will describe the details with reference to the accompanying drawings. Figure 30 The implementation method.

[0536] 4.2.3. Examples of portable devices applying various embodiments of the present disclosure

[0537] Figure 31Exemplary portable devices applicable to embodiments of this disclosure are illustrated. A portable device can be any of the following: a smartphone, a smart tablet, a wearable device (e.g., a smartwatch or smart glasses), or a portable computer (e.g., a laptop). A portable device can be referred to as a mobile station (MS), user terminal (UT), mobile subscriber station (MSS), subscriber station (SS), advanced mobile station (AMS), or wireless terminal (WT).

[0538] Reference Figure 31 The handheld device 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an I / O unit 140c. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 to 130 / 140a to 140c respectively correspond to... Figure 30 Blocks 110 to 130 / 140.

[0539] Communication unit 110 can send and receive signals (e.g., data and control signals) to and from other wireless devices or BSs. Control unit 120 can perform various operations by controlling the constituent elements of handheld device 100. Control unit 120 may include an application processor (AP). Memory unit 130 can store data / parameters / programs / codes / commands required to drive handheld device 100. Memory unit 130 can store input / output data / information. Power supply unit 140a can supply power to handheld device 100 and includes wired / wireless charging circuitry, a battery, etc. Interface unit 140b can support connection between handheld device 100 and other external devices. Interface unit 140b may include various ports for connection to external devices (e.g., audio I / O ports and video I / O ports). I / O unit 140c can input or output video information / signals, audio information / signals, data, and / or information input by the user. I / O unit 140c may include a camera, microphone, user input unit, display unit 140d, speaker, and / or touch module.

[0540] As an example, in the case of data communication, I / O unit 140c can acquire information / signals input by the user (e.g., touch, text, voice, image, or video), and the acquired information / signals can be stored in memory unit 130. Communication unit 110 can convert the information / signals stored in memory into radio signals and transmit the converted radio signals directly to other wireless devices or to the BS. Communication unit 110 can receive radio signals from other wireless devices or the BS, and then recover the received radio signals into the original information / signals. The recovered information / signals can be stored in memory unit 130 and can be output as various types (e.g., text, voice, image, video, or haptic type) through I / O unit 140c.

[0541] 4.2.4. Examples of vehicles or autonomous vehicles employing various embodiments of this disclosure

[0542] Figure 32 Exemplary vehicles or autonomous vehicles to which various embodiments of this disclosure are applied are illustrated. These vehicles or autonomous vehicles can be mobile robots, automobiles, trains, manned / unmanned aerial vehicles (AVs), ships, etc.

[0543] Reference Figure 32 The vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to... Figure 30 Blocks 110 / 130 / 140.

[0544] The communication unit 110 can send and receive signals (e.g., data and control signals) with external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling the components of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a enables the vehicle or autonomous vehicle 100 to move on a road. The drive unit 140a may include an engine, motor, powertrain, wheels, brakes, steering system, etc. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuitry, batteries, etc. The sensor unit 140c can acquire vehicle status, surrounding environment information, user information, etc. Sensor unit 140c may include inertial measurement unit (IMU) sensors, collision sensors, wheel sensors, speed sensors, slope sensors, weight sensors, heading sensors, position modules, vehicle forward / reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, humidity sensors, ultrasonic sensors, illuminance sensors, pedal position sensors, etc. Autonomous driving unit 140d can implement technologies for maintaining the vehicle within its lane, technologies for automatically adjusting speed such as adaptive cruise control, technologies for autonomous driving along a defined path, and technologies for driving by automatically setting a route when a destination is set, etc.

[0545] For example, communication unit 110 can receive map data, business information data, etc., from an external server. Autonomous driving unit 140d can generate autonomous driving paths and driving plans from the acquired data. Control unit 120 can control drive unit 140a, enabling the vehicle or autonomous vehicle 100 to move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, communication unit 110 can periodically or non-periodically acquire the latest traffic information data from an external server and can acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, sensor unit 140c can acquire vehicle status and / or surrounding environment information. Autonomous driving unit 140d can update the autonomous driving path and driving plan based on newly acquired data / information. Communication unit 110 can transmit information about vehicle location, autonomous driving path, and / or driving plan to an external server. The external server can predict traffic information data using AI technology, etc., based on information collected from the vehicle or autonomous vehicle, and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0546] 4.2.5. Examples of AR / VR and Vehicles Applying Various Embodiments of the Present Disclosure

[0547] Figure 33Exemplary vehicles applying various embodiments of this disclosure are illustrated. The vehicles can be implemented as transport vehicles, trains, airplanes, ships, etc.

[0548] Reference Figure 33 The vehicle 100 may include a communication unit 110, a control unit 120, a memory unit 130, an I / O unit 140a, and a positioning unit 140b. Here, blocks 110 to 130 / 140a and 140b correspond to Figure 30 Blocks 110 to 130 / 140.

[0549] Communication unit 110 can send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles or BS. Control unit 120 can perform various operations by controlling the components of vehicle 100. Memory unit 130 can store data / parameters / programs / codes / commands to support various functions of vehicle 100. I / O unit 140a can output AR / VR objects based on information in memory unit 130. I / O unit 140a may include a HUD. Positioning unit 140b can acquire information about the location of vehicle 100. Location information may include information about the absolute location of vehicle 100, information about the location of vehicle 100 within the driving lane, acceleration information, and information about the location of vehicle 100 relative to adjacent vehicles. Positioning unit 140b may include GPS and various sensors.

[0550] As an example, the communication unit 110 of vehicle 100 can receive map information and traffic information from an external server and store the received information in the memory unit 130. The positioning unit 140b can obtain vehicle location information via GPS and various sensors and store the obtained information in the memory unit 130. The control unit 120 can generate virtual objects based on map information, traffic information, and vehicle location information, and the I / O unit 140a can display the generated virtual objects in windows (1410 and 1420) inside the vehicle. The control unit 120 can determine whether vehicle 100 is driving normally within its lane based on the vehicle location information. If vehicle 100 abnormally exits its lane, the control unit 120 can display a warning on the vehicle's window via the I / O unit 140a. Additionally, the control unit 120 can broadcast warning messages about driving abnormalities to adjacent vehicles via the communication unit 110. Depending on the circumstances, the control unit 120 can send vehicle location information and information about driving / vehicle abnormalities to relevant authorities.

[0551] In summary, various embodiments of this disclosure can be implemented by a device and / or UE.

[0552] For example, a device can be any of a BS, network node, transmitting UE, receiving UE, wireless device, wireless communication device, vehicle, vehicle equipped with autonomous driving capabilities, unmanned aerial vehicle (UAV), artificial intelligence (AI) module, robot, augmented reality (AR) device, virtual reality (VR) device, and other devices.

[0553] For example, the UE can be any of a personal digital assistant (PDA), cellular phone, personal communication service (PCS) phone, global mobile system (GSM) phone, broadband CDMA (WCDMA) phone, mobile broadband system (MBS) phone, smartphone, and multi-mode multi-band (MM-MB) terminal.

[0554] A smartphone is a terminal that combines the advantages of a mobile communication terminal and a PDA. It achieves this by integrating data communication functions, such as scheduling, faxing, and internet connectivity, into a mobile communication terminal. Furthermore, an MM-MB terminal refers to a terminal with a built-in multi-modem chip, thus enabling operation in all portable internet systems and other mobile communication systems (e.g., CDMA2000, WCDMA, etc.).

[0555] Alternatively, the UE can be any of a laptop PC, handheld PC, tablet PC, ultrabook, PCB PC, digital broadcast terminal, portable multimedia player (PMP), navigator, and wearable device (such as a smartwatch, smart glasses, and head-mounted display (HMD)). For example, a UAV can be an unmanned aerial vehicle flying under the control of wireless control signals. For example, an HMD can be a display device worn around the head. For example, an HMD can be used to implement AR or VR.

[0556] Various embodiments of this disclosure can be implemented in various ways. For example, various embodiments of this disclosure can be implemented in hardware, firmware, software, or a combination thereof.

[0557] In a hardware configuration, the method according to an exemplary embodiment of this disclosure can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, etc.

[0558] In firmware or software configurations, the methods according to various embodiments of this disclosure can be implemented in the form of modules, processes, functions, etc., that perform the above-described functions or operations. Software code can be stored in memory and executed by a processor. The memory may be located internally or externally to the processor and can send data to and receive data from the processor via various known methods.

[0559] Those skilled in the art will recognize that various embodiments of this disclosure may be implemented in other specific ways than those set forth herein without departing from the spirit and essential characteristics of the various embodiments described herein. Therefore, the above embodiments are to be construed as exemplary and not restrictive in all respects. The scope of this disclosure should be determined by the appended claims and their legal equivalents, not by the foregoing description, and all variations falling within the meaning and scope of the appended claims are intended to be included. It will be apparent to those skilled in the art that claims not expressly referenced in each other in the appended claims may be combined as embodiments of this disclosure, or incorporated as new claims by subsequent amendments after filing of the application.

[0560] Industrial applicability

[0561] The various embodiments of this disclosure are applicable to a wide range of wireless access systems. Examples of such systems include 3GPP or 3GPP2 systems. Beyond these systems, the various embodiments of this disclosure are applicable to all technical fields where wireless access systems find their application. Furthermore, the proposed methods can also be applied to millimeter-wave communication systems using ultra-high frequency bands.

Claims

1. A method for a user equipment (UE) in a wireless communication system, the method comprising the following steps: Receive uplink reference signal UL RS configuration information; as well as Transmit UL RS on UL RS resources configured based on the UL RS configuration information. The UL RS resource includes multiple resource elements (REs). The plurality of REs are configured as N-comb in the frequency domain, where N is a natural number. The starting positions in the frequency domain associated with the plurality of REs are determined based on modulo-N operations performed on values ​​obtained by adding (i) a comb offset and (ii) a preset offset, wherein information regarding the comb offset is received from the UL RS configuration information, and The preset offset is determined based on (i) the N-comb and (ii) the multiple orthogonal frequency division multiplexing (OFDM) symbols occupied by the multiple REs.

2. The method according to claim 1, wherein, Based on the UL RS being configured for positioning, the preset offsets differ among the plurality of OFDM symbols.

3. The method according to claim 1, wherein, In the frequency domain, the plurality of REs are configured in ascending order, starting from the starting position and spaced N apart.

4. The method according to claim 1, wherein, The starting positions are determined for each of the plurality of OFDM symbols, and The plurality of OFDM symbols are respectively occupied by some of the plurality of REs.

5. The method according to claim 1, wherein, The transmission power for the UL RS is determined based on the path loss measured by a reference signal RS configured as quasi-co-location QCL type D.

6. The method according to claim 1, wherein, The UL RS is the detection reference signal SRS.

7. A device in a wireless communication system, the device comprising: At least one processor; as well as At least one memory, operatively coupled to the at least one processor to store one or more instructions configured to cause the at least one processor to perform an operation, the operation including: Receive uplink reference signal UL RS configuration information; and UL RS is transmitted on UL RS resources configured based on the UL RS configuration information, wherein the UL RS resources include multiple resource elements (REs). The plurality of REs are configured as N-comb in the frequency domain, where N is a natural number. The starting positions in the frequency domain associated with the plurality of REs are determined based on modulo-N operations performed on values ​​obtained by adding (i) a comb offset and (ii) a preset offset, wherein information regarding the comb offset is received from the UL RS configuration information, and The preset offset is determined based on (i) the N-comb and (ii) the multiple orthogonal frequency division multiplexing (OFDM) symbols occupied by the multiple REs.

8. A user equipment (UE) in a wireless communication system, the UE comprising: At least one transceiver; At least one processor; as well as At least one memory, operatively coupled to the at least one processor to store one or more instructions configured to cause the at least one processor to perform an operation, the operation including: Receive uplink reference signal UL RS configuration information; and UL RS is transmitted on UL RS resources configured based on the UL RS configuration information, wherein the UL RS resources include multiple resource elements (REs). The plurality of REs are configured as N-comb in the frequency domain, where N is a natural number. The starting positions in the frequency domain associated with the plurality of REs are determined based on modulo-N operations performed on values ​​obtained by adding (i) a comb offset and (ii) a preset offset, wherein information regarding the comb offset is received from the UL RS configuration information, and The preset offset is determined based on (i) the N-comb and (ii) the multiple orthogonal frequency division multiplexing (OFDM) symbols occupied by the multiple REs.

9. A computer-readable storage medium storing at least one computer program comprising one or more instructions, said one or more instructions, when executed by at least one processor, causing said at least one processor to perform operations for a user equipment (UE), said operations comprising: Receive uplink reference signal UL RS configuration information; as well as UL RS is transmitted on UL RS resources configured based on the UL RS configuration information, wherein the UL RS resources include multiple resource elements (REs). The plurality of REs are configured as N-comb in the frequency domain, where N is a natural number. The starting positions in the frequency domain associated with the plurality of REs are determined based on modulo-N operations performed on values ​​obtained by adding (i) a comb offset and (ii) a preset offset, wherein information regarding the comb offset is received from the UL RS configuration information, and The preset offset is determined based on (i) the N-comb and (ii) the multiple orthogonal frequency division multiplexing (OFDM) symbols occupied by the multiple REs.

10. A method for a base station in a wireless communication system, the method comprising the steps of: Send uplink reference signal UL RS configuration information; as well as UL RS is received on UL RS resources configured based on the UL RS configuration information, wherein the UL RS resources include multiple resource elements (REs). The plurality of REs are configured as N-comb in the frequency domain, where N is a natural number. The starting position in the frequency domain associated with the plurality of REs is determined based on a modulo-N operation performed on the values ​​obtained by adding (i) a comb offset and (ii) a preset offset, wherein the information regarding the comb offset is received from the UL RS configuration information, and The preset offset is determined based on (i) the N-comb and (ii) the multiple orthogonal frequency division multiplexing (OFDM) symbols occupied by the multiple REs.

11. A base station in a wireless communication system, the base station comprising: At least one processor; as well as At least one memory, operatively coupled to the at least one processor to store one or more instructions configured to cause the at least one processor to perform an operation, the operation including: Send uplink reference signal UL RS configuration information; and UL RS is received on UL RS resources configured based on the UL RS configuration information, wherein the UL RS resources include multiple resource elements (REs). The plurality of REs are configured as N-comb in the frequency domain, where N is a natural number. The starting positions in the frequency domain associated with the plurality of REs are determined based on modulo-N operations performed on values ​​obtained by adding (i) a comb offset and (ii) a preset offset, wherein information regarding the comb offset is received from the UL RS configuration information, and The preset offset is determined based on (i) the N-comb and (ii) the multiple orthogonal frequency division multiplexing (OFDM) symbols occupied by the multiple REs.

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