Method and apparatus for transmitting and receiving signals in wireless communication system

Abstract

A method for transmitting a signal by a wireless communication device according to at least one of examples disclosed in the present specification may comprise: determining transmission power of each of a plurality of reference signals including a first reference signal and a second reference signal; and transmitting at least one of the plurality of reference signals on the basis of the determined transmission power, wherein bandwidth (BW) aggregation across a plurality of carriers is configured for the first reference signal, and on the basis that the first reference signal at least partially overlaps with the second reference signal in the time domain, transmission power is assigned to the bandwidth-aggregated first reference signal with a priority higher than that of the second reference signal.

Description

Method and device for transmitting and receiving signals in a wireless communication system

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method for transmitting or receiving an uplink / downlink signal and a device therefor.

[0002] Wireless communication systems are widely deployed to provide various types of communication services, such as voice and data. Typically, wireless communication systems are multiple access systems that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power). 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] The technical task to be achieved is to provide a method and a device for transmitting or receiving signals more accurately and efficiently in a wireless communication system.

[0004] The technical task to be achieved is not limited to this, and other technical tasks can be inferred from the disclosed embodiments.

[0005] A method for transmitting a signal by a wireless communication device according to one aspect comprises: determining a transmission power of each of a plurality of reference signals including a first reference signal and a second reference signal; and transmitting at least one of the plurality of reference signals based on the determined transmission power, wherein bandwidth (BW) aggregation across a plurality of carriers is set for the first reference signal, and transmission power may be assigned to the bandwidth-aggregated first reference signal with a higher priority than the second reference signal based on the first reference signal at least partially overlapping with the second reference signal in the time domain.

[0006] According to another aspect, a processor-readable recording medium storing instructions for performing the method described above may be provided.

[0007] According to another aspect, a wireless communication device comprises: a memory storing instructions; and a processor operating by executing the instructions, wherein the operation of the processor comprises determining a transmission power of each of a plurality of reference signals including a first reference signal and a second reference signal; and transmitting at least one of the plurality of reference signals based on the determined transmission power, wherein bandwidth (BW) aggregation across a plurality of carriers is set for the first reference signal, and transmission power may be assigned to the bandwidth-aggregated first reference signal with a higher priority than the second reference signal based on the first reference signal at least partially overlapping with the second reference signal in the time domain.

[0008] Based on the sum of the power required for the first reference signal and the power required for the second reference signal exceeding the maximum transmission power of the wireless communication device, transmission power may be allocated to the first reference signal with the high priority within the maximum transmission power range.

[0009] The second reference signal may be assigned reduced transmission power.

[0010] The above plurality of reference signals may further include a third reference signal for which bandwidth aggregation is set.

[0011] Based on the fact that the first reference signal at least partially overlaps with the third reference signal in the time domain, transmission power may be allocated with higher priority to a reference signal set across more carriers among the first reference signal and the third reference signal.

[0012] Based on the fact that the first reference signal at least partially overlaps with the third reference signal in the time domain, transmission power may be allocated with higher priority to a reference signal set over a wider frequency band among the first reference signal and the third reference signal.

[0013] The transmission power may be allocated to the first reference signal with a higher priority than the third reference signal based on the fact that the carrier having the highest priority among the plurality of carriers for which the first reference signal is set has a higher priority than the carrier having the highest priority among the plurality of carriers for which the third reference signal is set.

[0014] The above wireless communication device may be a terminal.

[0015] The above first reference signal may be a sounding reference signal (SRS) for positioning.

[0016] The above wireless communication device may be a base station.

[0017] The above multiple reference signals may be downlink reference signals.

[0018] According to one embodiment, signals can be transmitted or received more accurately and efficiently in a wireless communication system.

[0019] The technical effects are not limited thereto and other technical effects can be inferred from the disclosed embodiments.

[0020] Figure 1 illustrates physical channels used in a 3GPP system, which is an example of a wireless communication system, and a general signal transmission method using the channels.

[0021] Figure 2 is a diagram showing an example of positioning protocol settings.

[0022] Figure 3 is a diagram showing an example of Multi RTT.

[0023] Figure 4 illustrates the positioning structure of a next generation RAN (radio access network).

[0024] Figure 5 illustrates an example of location services supported by NG-RAN.

[0025] FIG. 6 illustrates an example of a sensing operation according to one embodiment of the present disclosure.

[0026] FIG. 7 illustrates a procedure related to a sensing operation according to one embodiment of the present specification.

[0027] Figure 8 illustrates an example of the proposed terminal operation.

[0028] Figure 9 illustrates an example of the proposed base station operation.

[0029] Figure 10 illustrates an example of giving high transmit power priority to BW-agg-SRS-p.

[0030] Figure 11 illustrates another example of a scheduling situation in which high transmit power priority is given to BW-agg-SRS-p.

[0031] Figure 12 illustrates an example in which the power priority of BW-agg-SRS-p is determined based on the number of carriers.

[0032] Figure 13 illustrates an example of determining the transmission power of BW-agg-SRS-p according to the transmission power priority of a specific carrier.

[0033] Fig. 14 illustrates a flowchart of a signal transmission method of a wireless communication device according to one embodiment.

[0034] Figure 15 illustrates a flexible network topology to which some examples of this specification may be applied.

[0035] Figure 16 illustrates an example of a communication system applicable to the present disclosure.

[0036] FIG. 17 illustrates an example of a wireless device applicable to the present disclosure.

[0037] As used herein, "A or B" can mean "only A," "only B," or "both A and B." In other words, as used herein, "A or B" can be interpreted as "A and / or B." For example, as used herein, "A, B or C" can mean "only A," "only B," "only C," or "any combination of A, B and C."

[0038] As used herein, a slash ( / ) or a comma can mean "and / or." For example, "A / B" can mean "A and / or B." Accordingly, "A / B" can mean "only A," "only B," or "both A and B." For example, "A, B, C" can mean "A, B, or C."

[0039] In this specification, "at least one of A and B" may mean "only A", "only B" or "both A and B". Additionally, in this specification, the expressions "at least one of A or B" or "at least one of A and / or B" may be interpreted identically to "at least one of A and B".

[0040] Additionally, in this specification, “at least one of A, B and C” can mean “only A,” “only B,” “only C,” or “any combination of A, B and C.” Additionally, “at least one of A, B or C” or “at least one of A, B and / or C” can mean “at least one of A, B and C.”

[0041] Additionally, parentheses used herein may mean "for example." Specifically, when "control information (ABC)" is indicated, "ABC" may be described as an example of "control information." For example, "control information" may include DEF as another example. In other words, "control information" in this specification is not limited to "ABC," and "ABC" may be described as an example of "control information." Furthermore, even when indicated as "control information (i.e., ABC)," "ABC" may be described as an example of "control information."

[0042] Additionally, in this specification, terms such as “first,” “second,” etc. are used only for the purpose of distinguishing one component from another component and are not used to limit the components, and do not limit the order or importance between the components unless specifically limited. Accordingly, a first component in one embodiment of this specification may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment may be referred to as a first component in another embodiment.

[0043] In the following explanation, ‘when, if, in case of’ can be replaced with ‘based on’.

[0044] Technical features individually described in a single drawing in this specification may be implemented individually or simultaneously.

[0045] In this specification, a terminal is a user equipment (UE) or a consumer-side device, and may also be referred to as a base station / second node / IAB node / first node that receives / transmits signals from / to a Transmission-Reception Point (TRP). A terminal may correspond to a physical node or a logical node. A terminal may correspond to an endpoint on the user side, or may correspond to an intermediate point between other endpoints. In communication between two points that are not limited to endpoints (including one-to-one / many-to-one / one-to-many / many-to-many communication), a terminal may correspond to a served node. A terminal may be a node with a fixed location, or a node with an unfixed location (or mobile).

[0046] In this specification, a base station (BS) is a device on the network side, and may also be called a second node / IAB node / x-NodeB (x-NodeB, x may be an abbreviation related to radio access technology (RAT)) / Transmission-Reception Point (TRP). A BS may correspond to a physical node or a logical node. A BS may correspond to an endpoint on the network side, or may correspond to an intermediate point between other endpoints. In communication between two points that are not limited to endpoints (including one-to-one / many-to-one / one-to-many / many-to-many communication), a BS may correspond to a serving node. A BS may be a node with a fixed location, or a node with an unfixed location.

[0047] In this specification, higher layer parameters may be set for the terminal, preset, or predefined. For example, the base station may transmit higher layer parameters to the terminal. For example, the terminal may transmit parameters such as capabilities to the base station as higher layer parameters. For example, the higher layer parameters may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0048] In this specification, the information / state / parameter being “configured or pre-configured” can be interpreted as the information / state / parameter being provided / pre-provided to the terminal through pre-defined signaling (e.g., SIB, MAC, RRC) from the base station. In this specification, the information / state / parameter being “defined or pre-defined” can be interpreted as the information / state / parameter being known in advance or pre-stored at the base station and the terminal without signaling between the base station and the terminal.

[0049] The technology described in this specification can be used in various wireless communication systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented with wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000. TDMA can be implemented with wireless technologies such as GSM (global system for mobile communications) / GPRS (general packet radio service) / EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented with wireless technologies such as IEEE (Institute of Electrical and Electronics Engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (evolved UTRA), LTE (long term evolution), and 5G NR.

[0050] The technology described in this specification can be implemented with 6G wireless technology and applied to various 6G systems. For example, the 6G system can have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine-type communication (mMTC), artificial intelligence (AI) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0051] The following documents may be referenced for background information, definitions of terms, abbreviations, etc. related to the present invention (Incorporated by Reference).

[0052] - 38.211: Physical channels and modulation

[0053] - 38.212: Multiplexing and channel coding

[0054] - 38.213: Physical layer procedures for control

[0055] - 38.214: Physical layer procedures for data

[0056] - 38.215: Physical layer measurements

[0057] - 38.300: NR and NG-RAN Overall Description

[0058] - 38.304: User Equipment (UE) procedures in idle mode and in RRC Inactive state

[0059] - 38.321Medium Access Control (MAC) protocol specification

[0060] - 38.331: Radio Resource Control (RRC) protocol specification

[0061] - 37.213: Introduction of channel access procedures to unlicensed spectrum for NR-based access

[0062] - 36.355: LTE Positioning Protocol

[0063] - 37.355: LTE Positioning Protocol

[0064] 용어 및 약어

[0065] - 5GC: 5G Core Network

[0066] - 5GS: 5G System

[0067] - AoA: Angle of Arrival

[0068] - AP: Access Point

[0069] - CID: Cell ID

[0070] - E-CID: Enhanced Cell ID

[0071] - GNSS: Global Navigation Satellite System

[0072] - GPS: Global Positioning System

[0073] - LCS: LoCation Service

[0074] - LMF: Location Management Function

[0075] - LPP: LTE Positioning Protocol

[0076] - MO-LR: Mobile Originated Location Request

[0077] - MT-LR: Mobile Terminated Location Request

[0078] - NRPPa: NR Positioning Protocol A

[0079] - OTDOA: Observed Time Difference Of Arrival

[0080] - PDU: Protocol Data Unit

[0081] - PRS: Positioning Reference Signal

[0082] - RRM: Radio Resource Management

[0083] - RSSI: Received Signal Strength Indicator

[0084] - RSTD: Reference Signal Time Difference

[0085] - ToA: Time of Arrival

[0086] - TP: Transmission Point

[0087] - TRP: Transmission and Reception Point

[0088] - UE: User Equipment

[0089] - SS: Search Space

[0090] - CSS: Common Search Space

[0091] - USS: UE-specific Search Space

[0092] - PDCCH: Physical Downlink Control Channel

[0093] - PDSCH: Physical Downlink Shared Channel;

[0094] - PUCCH: Physical Uplink Control Channel;

[0095] - PUSCH: Physical Uplink Shared Channel;

[0096] - DCI: Downlink Control Information

[0097] - UCI: Uplink Control Information

[0098] - SI: System Information

[0099] - SIB: System Information Block

[0100] - MIB: Master Information Block

[0101] - RRC: Radio Resource Control

[0102] - DRX: Discontinuous Reception

[0103] - RNTI: Radio Network Temporary Identifier

[0104] - CSI: Channel state information

[0105] - PCell: Primary Cell

[0106] - SCell: Secondary Cell

[0107] - PSCell: Primary SCG (Secondary Cell Group) Cell

[0108] - CA: Carrier Aggregation

[0109] - WUS: Wake up Signal

[0110] - TX: Transmitter

[0111] - RX: Receiver

[0112] - RSTD: Reference Signal Time Difference

[0113] - RS: Reference Signal

[0114] - PRS: Positioning Reference Signal

[0115] - SRS: Sounding Reference Signal

[0116] Figure 1 is a drawing for explaining physical channels used in a 3GPP NR system and a general signal transmission method using them.

[0117] When a terminal is powered on again from a powered-off state or enters a new cell, it performs an initial cell search operation, such as synchronizing with the base station, in step S101. To this end, the terminal receives a Synchronization Signal Block (SSB) from the base station. The SSB includes a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). The terminal synchronizes with the base station based on the PSS / SSS and obtains information such as a cell ID (cell identity). In addition, the terminal can obtain broadcast information within the cell based on the PBCH. Meanwhile, the terminal can check the downlink channel status by receiving a Downlink Reference Signal (DL RS) during the initial cell search phase.

[0118] After completing the initial cell search, the terminal can obtain more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on the physical downlink control channel information in step S102.

[0119] Thereafter, the terminal may perform a random access procedure such as steps S103 to S106 to complete connection to the base station. To this end, the terminal may transmit a preamble through a physical random access channel (PRACH) (S103) and receive a response message to the preamble through a physical downlink control channel and a corresponding physical downlink shared channel (S104). In the case of contention-based random access, a contention resolution procedure such as transmission of an additional physical random access channel (S105) and reception of a physical downlink control channel and a corresponding physical downlink shared channel (S106) may be performed.

[0120] The terminal that has performed the procedure as described above can then perform the general uplink / downlink signal transmission procedure, such as receiving a physical downlink control channel / physical downlink shared channel (S107) and transmitting a physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) (S108). The control information that the terminal transmits to the base station is collectively referred to as uplink control information (UCI). UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and request Acknowledgement / Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc. CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indication), etc. UCI is generally transmitted through PUCCH, but can be transmitted through PUSCH when control information and traffic data must be transmitted simultaneously. Additionally, UCI can be transmitted aperiodically via PUSCH upon request / instruction from the network.

[0121] In NR, uplink and downlink transmissions are organized into frames. Each radio frame is 10 ms long and is divided into two 5 ms half-frames (HF). Each half-frame is divided into five 1 ms subframes (SF). Each subframe is divided into one or more slots, and the number of slots within a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols, depending on the cyclic prefix (CP). When a normal CP is used, each slot contains 14 OFDM symbols. When an extended CP is used, each slot contains 12 OFDM symbols.

[0122] A slot contains multiple symbols in the time domain. For example, in the case of a normal CP, one slot contains 14 symbols, but in the case of an extended CP, one slot contains 12 symbols. A carrier contains multiple subcarriers in the frequency domain. A Resource Block (RB) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A Bandwidth Part (BWP) is defined as multiple consecutive Physical RBs (PRBs) in the frequency domain and can correspond to a single numerology (e.g., SCS, CP length, etc.). A carrier can contain up to N (e.g., 5) BWPs. Data communication is performed through activated BWPs, and a terminal can only activate one BWP per carrier. Each element in the resource grid is referred to as a Resource Element (RE), and one complex symbol can be mapped to it.

[0123] Positioning

[0124] Positioning can refer to determining the geographic location and / or velocity of a user equipment (UE) by measuring wireless signals. Location information can be requested by a client (e.g., an application) associated with the UE and reported to the client. Furthermore, the location information may be contained within a core network or requested by a client connected to the core network. The location information may be reported in a standard format, such as cell-based or geographic coordinates, and may also include an estimated error value for the UE's location and velocity and / or the positioning method used for positioning.

[0125] Figure 2 is a diagram showing an example of a positioning protocol configuration for measuring the position of a terminal.

[0126] Referring to FIG. 2, LPP can be used as a point-to-point between a location server (E-SMLC and / or SLP and / or LMF) and a target device to position the target device (UE and / or SET) using position-related measurements obtained from one or more reference sources. Through LPP, the target device and the location server can exchange measurement and / or location information based on signal A and / or signal B.

[0127] 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.

[0128] The functions provided by the NRPPa protocol may include:

[0129] - E-CID Location Information Transfer. This function allows location information to be exchanged between the reference source and the LMF for E-CID positioning purposes.

[0130] - OTDOA Information Transfer. This function allows information to be exchanged between the reference source and the LMF for OTDOA positioning purposes.

[0131] - Reporting of General Error Situations. This feature allows reporting of general error situations for which no function-specific error message is defined.

[0132] The positioning methods supported by NG-RAN may include GNSS (Global Navigation Satellite System), OTDOA, E-CID (enhanced cell ID), barometric positioning, WLAN positioning, Bluetooth positioning, terrestrial beacon system (TBS), and UTDOA (Uplink Time Difference of Arrival). Among the above positioning methods, the position of the UE may be measured using any one of the positioning methods, but the position of the UE may also be measured using two or more positioning methods.

[0133] OTDOA (observed time difference of arrival)

[0134] The OTDOA positioning method utilizes the timing measurements of downlink signals received by the UE from multiple TPs, including the eNB, ng-eNB, and PRS-dedicated TPs. The UE measures the timing of the received downlink signals using location assistance data received from a location server. Based on these measurement results and the geographic coordinates of neighboring TPs, the UE's location can be determined.

[0135] A UE connected to a gNB can request a measurement gap for OTDOA measurements from a TP. If the UE does not recognize the SFN for at least one TP in the OTDOA assistance data, the UE can use an autonomous gap to obtain the SFN of the OTDOA reference cell before requesting a measurement gap to perform Reference Signal Time Difference (RSTD) measurements.

[0136] Here, the RSTD can be defined based on the smallest relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell, respectively. That is, it can be calculated based on the relative time difference between the start time of the subframe of the reference cell that is closest to the start time of the subframe received from the measurement cell. Meanwhile, the reference cell can be selected by the UE.

[0137] Accurate OTDOA measurement requires measuring the time of arrival (TOA) of signals received from three or more geographically dispersed TPs or base stations. For example, the TOA for TP 1, TP 2, and TP 3 can be measured, and based on the three TOAs, the RSTD for TP 1-TP 2, the RSTD for TP 2-TP 3, and the RSTD for TP 3-TP 1 can be calculated. Based on these TOAs, a geometric hyperbola can be determined, and the point where these hyperbolas intersect can be used to estimate the UE's location. Since each TOA measurement may have inaccuracies and / or uncertainties, the estimated UE's location can be known within a certain range depending on the measurement uncertainty.

[0138] E-CID (Enhanced Cell ID)

[0139] In the Cell ID (CID) positioning method, the location of the UE can be measured through geographic information of the UE's serving ng-eNB, serving gNB, and / or serving cell. For example, geographic information of the serving ng-eNB, serving gNB, and / or serving cell can be obtained through paging, registration, etc.

[0140] Meanwhile, the E-CID positioning method may utilize additional UE measurements and / or NG-RAN radio resources in addition to the CID positioning method to improve the UE position estimate. In the E-CID positioning method, some of the same measurement methods as the measurement control system of the RRC protocol may be used, but generally, additional measurements are not performed solely for UE position measurement. In other words, a separate measurement configuration or measurement control message may not be provided to measure the UE's position, and the UE may not expect to be requested to perform additional measurement operations solely for position measurement, and may report measurement values ​​obtained through measurement methods that the UE can generally measure.

[0141] For example, a serving gNB can implement an E-CID positioning method using E-UTRA measurements provided from the UE.

[0142] Examples of measurement elements that can be used for E-CID positioning include:

[0143] - UE measurements: E-UTRA RSRP (Reference Signal Received Power), E-UTRA RSRQ (Reference Signal Received Quality), UE E-UTRA Rx-Tx Time difference, GERAN / WLAN RSSI (Reference Signal Strength Indication), UTRAN CPICH (Common Pilot Channel) RSCP (Received Signal Code Power), UTRAN CPICH Ec / Io

[0144] - E-UTRAN measurements: ng-eNB Rx-Tx Time difference, Timing Advance (T ADV ), Angle of Arrival (AoA)

[0145] Here, T ADV It can be divided into Type 1 and Type 2 as follows.

[0146] T ADV Type 1 = (ng-eNB receive-transmit time difference) + (UE E-UTRA receive-transmit time difference)

[0147] T ADV Type 2 = ng-eNB receive-transmit time difference

[0148] Meanwhile, AoA can be used to measure the direction of a UE. AoA can be defined as an estimated angle relative to the UE's position in a counterclockwise direction from a base station / TP. In this case, the geographical reference direction may be north. The base station / TP can use uplink signals such as a Sounding Reference Signal (SRS) and / or a Demodulation Reference Signal (DMRS) for AoA measurement. In addition, the larger the antenna array array, the higher the AoA measurement accuracy. When antenna arrays are arranged at equal intervals, signals received from adjacent antenna elements can have a constant phase shift (phase-rotate).

[0149] UTDOA (Uplink Time Difference of Arrival)

[0150] UTDOA is a method for determining the location of a UE by estimating the arrival time of the SRS. When calculating the estimated SRS arrival time, the serving cell is used as a reference cell, and the UE's location can be estimated through the arrival time difference with other cells (or base stations / TPs). To implement UTDOA, the E-SMLC can indicate the target UE's serving cell to instruct the target UE to transmit SRS. In addition, the E-SMLC can provide configuration settings such as whether the SRS is periodic or aperiodic, bandwidth, and frequency / group / sequence hopping.

[0151] Multi RTT (round trip time)

[0152] Figure 3 is a diagram showing an example of a Multi RTT (round trip time) positioning method.

[0153] Referring to Fig. 3 (a), an RTT process is illustrated in which a TOA measurement is performed by an initiating device and a responding device, and the responding device provides the TOA measurement to the initiating device for RTT measurement (calculation). For example, the initiating device may be a TRP and / or a terminal, and the responding device may be a terminal and / or a TRP.

[0154] The initiating device transmits an RTT measurement request, and the responding device can receive it (1301).

[0155] The initiating device can transmit the RTT measurement signal at t0, and the responding device can obtain the TOA measurement t1 (1303).

[0156] The responding device can transmit the RTT measurement signal at t2, and the initiating device can obtain the TOA measurement t3 (1305).

[0157] The responding device can transmit information about [t2-t1], and the initiating device can receive the information and calculate the RTT (1307). The information can be transmitted and received based on a separate signal, or can be transmitted and received as part of the RTT measurement signal (1305).

[0158] Referring to Fig. 3 (b), the RTT can correspond to a double-range measurement between two devices. Positioning estimation can be performed from the information. Based on the measured RTT, d1, d2, and d3 can be determined, and the target device location can be determined as the intersection of a circle centered at each of BS1, BS2, and BS3 (or TRP) and having each of d1, d2, and d3 as a radius.

[0159] NG-RAN positioning architecture and procedures

[0160] Figure 4 illustrates the positioning structure of a next generation (NG) radio access network (RAN). The NR RAN may be referred to as an NR RAN or a 5G RAN.

[0161] The AMF may receive a request for some location services related to a particular target UE from another entity (e.g., a GMLC or a UE), or the AMF itself may decide to initiate some location services on behalf of a particular target UE (e.g., in case of an IMS emergency call). The AMF may then send a location service request to the LMF. The LMF may process the location service request, which may include sending assistance data to the target UE for UE-based and / or UE-assisted positioning and / or positioning the target UE. The LMF sends the location service result (e.g., a position estimate for the UE) to the AMF. If the location service is requested by an entity other than the AMF (e.g., a GMLC or a UE), the AMF sends the location service result to that entity.

[0162] NG-RAN nodes can control TRPs / TPs such as RRM or DL-PRS only TPs to support PRS-based TBS.

[0163] LMF can be connected to E-SMLCt to access UTRAN information.

[0164] LMF can be connected to SLP, which is responsible for positioning with respect to the user plane.

[0165] Figure 5 illustrates an example of location services supported by NG-RAN.

[0166] When the AMF receives a Location Service Request while the UE is in CM-IDLE state, the AMF performs a network triggered service request to establish signaling for connection with the UE and allocation of a specific serving gNB / ng-eNB. In Fig. 5, it is assumed that the UE is in connected mode.

[0167] A location service request for the UE may be triggered, and the location service request for the UE may be any one of 1101, 1102 or 1103. For example, an entity of 5GC (e.g. GMLC) may request some location service (e.g. positioning) for the target UE to the serving AMF (1101), or the serving AMF may itself trigger some location service (e.g. to locate the UE for an emergency call) for the target UE (1102), or the UE may request some location service (e.g. positioning or assistance data forwarding) to the serving AMF at the NAS level (1103).

[0168] AMF forwards the location service request to LMF (1104).

[0169] LMF provides services in NG-RAN to obtain location measurement or assistance data and initiates a positioning procedure with a nearby ng-eNB / gNB (1105).

[0170] (Instead of or in addition to step 1105) the LMF initiates a positioning procedure with the UE to obtain a position estimate or positioning measurement or to transmit position assistance data to the UE (1106).

[0171] The LMF provides a location service response to the AMF (1107) (e.g., success or failure indication and a position estimate for the UE if requested and obtained).

[0172] (For 1101) AMF provides a location service response to the 5GC entity (1108) (e.g., location estimation for the UE).

[0173] (For 1102), AMF uses the location service response received in step 1107 to support the service triggered in step 1102 (1109) (e.g., providing location estimates related to emergency calls to GMLC).

[0174] (For 1103) AMF provides a location service response to the UE (1110) (e.g., location estimation for the UE).

[0175] SRS (sounding reference signal) for positioning

[0176] In a Rel. 15 NR system, periodic, aperiodic, and semi-persistent Rel. 15 SRS can be transmitted for base station UL RTOA (UL-Relative Time of Arrival), UL SRS-RSRP, and UL-AOA (UL-Angle of Arrival) measurements, thereby supporting UL TDOA and UL AOA.

[0177] In Rel. 16 / 17 NR systems, periodic, aperiodic, and semi-persistent SRS for positioning can be transmitted for UL RTOA, UL SRS-RSRP, UL-AOA, and gNB Rx-Tx time difference measurements of the base station, thereby supporting UL TDOA, UL AOA, and multi-RTT.

[0178] To avoid confusion between Rel. 15 SRS and SRS for positioning, SRS for positioning will be referred to as SRS-p. In the new methods proposed in this specification below, unless otherwise stated, SRS can be interpreted to mean SRS-p.

[0179] When the upper layer parameter SRS-PosResource is set for SRS (i.e., SRS-p) and the upper layer parameter SpatialRelationInfoPos is set, the ID of the configuration field of the reference RS is provided. The reference RS may be an SRS, CSI-RS, SS / PBCH block, DL PRS of a serving cell, or DL ​​PRS configured in an SS / PBCH block set by the upper layer parameter SRS-Resource or SRS-PosResource.

[0180] A UE is not expected to transmit multiple SRS resources with different spatial relationships in the same OFDM symbol.

[0181] If the upper layer parameter SpatialRelationInfoPos is not set, the terminal may use a fixed spatial domain transmission filter for transmission of SRS-p set by the upper layer parameter SRS-PosResource across multiple SRS resources, or may use another spatial domain transmission filter.

[0182] In RRC_CONNECTED mode, the terminal transmits SRS-p set by the upper layer parameter SRS-PosResource within the active UL BWP.

[0183] Only one RS source is provided for the upper layer parameter SpatialRelationInfoPos per SRS-p resource.

[0184] For operation on the same carrier, if SRS-p collides with a scheduled PUSCH, SRS-p is dropped in the symbol where the collision occurred.

[0185] The terminal does not expect SRS-PosResource to be set on a carrier of a serving cell having a slot format consisting of DL / UL symbols that are not set for PUSCH / PUCCH transmission.

[0186] Depending on the UE capability, SRS-p resources related to the initial UL BWP can be configured, and the SRS-p resources are transmitted within the initial UL BWP during RRC_INACTIVE mode with the same CP and subcarrier spacing as those configured for the initial UL BWP. Depending on the UE capability, SRS-p resources for positioning outside the initial BWP in RRC_INACTIVE mode can be configured, and the frequency location and bandwidth, subcarrier spacing, and CP length for SRS-p transmission can be configured. SRS-p resources configured outside the initial BWP in RRC_INACTIVE mode are configured in the same band and CC as the initial UL BWP.

[0187] ISAC (Integrated Sensing And Communication)

[0188] Wireless sensing is a technology that uses radio frequencies to determine the instantaneous linear velocity, angle, distance (range), etc. of an object, thereby obtaining information about the characteristics of the environment and / or objects within the environment. Because radio frequency sensing does not require a networked device to connect to the object, it can provide a service for object positioning without a device. The ability to obtain range, velocity, and angle information from radio frequency signals can enable a wide range of new capabilities, such as various object detection, object recognition (e.g., vehicles, humans, animals, UAVs), and high-precision localization, tracking, and activity recognition. Wireless sensing services can provide information to a variety of industries (e.g., drones, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted vehicle steering and navigation, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can utilize non-3GPP type sensors (e.g., radar, cameras) to further support 3GPP-based sensing. For example, the operation of wireless sensing services, i.e., sensing operations, may depend on the transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing offers an opportunity to enhance existing communication systems from a communication network to a wireless communication and sensing network.

[0189] FIG. 6 illustrates an example of a sensing operation according to an embodiment of the present disclosure. The embodiment of FIG. 6 can be combined with various embodiments of the present disclosure. Specifically, FIG. 6(a) illustrates an example of sensing using a sensing receiver and a sensing transmitter located at the same location (e.g., monostatic sensing), and FIG. 6(b) illustrates an example of sensing using a separated sensing receiver and sensing transmitter (e.g., bistatic sensing).

[0190] For example, in a wireless communication system based on a 6G network of the present specification, referring to FIG. 9(a), the sensing transmitter and the sensing receiver may be configured to be included in a single base station (i.e., the same base station) or a single terminal (i.e., the same terminal). Alternatively, referring to FIG. 9(b), the sensing transmitter and the sensing receiver may be configured to be included in different base stations, different terminals, or each terminal and base station.

[0191] In this regard, the following six types of sensing modes can be defined based on whether the sensing transmitter and sensing receiver are included in the base station or the terminal, respectively.

[0192] - Mode 1: A mode in which the sensing transmitter and sensing receiver are contained in a single base station (e.g., base station-based sensing mode in monostatic mode).

[0193] - Second mode: A mode in which the sensing transmitter is included in a first base station and the sensing receiver is included in a second base station different from the first base station (e.g., base station-based sensing mode in bistatic mode).

[0194] - Mode 3: A mode in which the sensing transmitter is included in the base station and the sensing receiver is included in the terminal (e.g., base station-terminal sensing mode).

[0195] - Mode 4: A mode in which the sensing transmitter is included in the terminal and the sensing receiver is included in the base station (e.g., terminal-base station sensing mode).

[0196] - Mode 5: A mode in which the sensing transmitter and sensing receiver are contained in a single terminal (e.g., terminal-based sensing mode in monostatic mode).

[0197] - 6th mode: A mode in which the sensing transmitter is included in a first terminal and the sensing receiver is included in a second terminal different from the first terminal (e.g., terminal-based sensing mode in bistatic mode).

[0198] In a wireless communication system based on a 6G network of the present specification, one or more of the six types of sensing modes described above may be utilized independently / in combination.

[0199] In relation to the sensing operation in FIG. 6, the sensing transmitter may transmit a sensing signal for sensing one or more objects (and / or an environment around the objects). For example, the sensing signal may correspond to a radio (frequency) signal defined to be transmittable by a base station / terminal in a wireless communication system based on a 6G network of the present specification. The sensing receiver may receive a signal scattered / reflected by one or more objects (and / or an environment around the objects) from a sensing signal transmitted from the sensing transmitter. In the sensing receiver, sensing data may be derived from the scattered / reflected signals, and sensing results may be generated / obtained through processing of the sensing data. Here, the sensing results may include characteristic information (e.g., location, distance, speed, angle, etc.) about one or more objects (and / or the environment around the objects). The sensing results generated / obtained in this way may be utilized for wireless sensing services (e.g., detection, tracking, etc. of objects and / or environments) provided in the wireless communication system based on the 6G network of the present specification, or may be provided / disclosed to a trusted third party.

[0200] Additionally, the sensing operation in FIG. 6 is described as a representative example of the operation in a wireless communication system based on a 6G network, but can be extended and applied to cases where terminals / base stations / signals based on networks of previous generations (e.g., 4G, 5G, etc.) are utilized.

[0201] Additionally, with respect to the wireless sensing described herein, in a wireless communication system based on a 6G network of the present specification, time / frequency resources for sensing operations and time / frequency resources for general communications (e.g., UL / DL / sidelink-based communications, etc.) may be scheduled / configured separately.

[0202] The time / frequency resources (hereinafter, sensing resources) for the aforementioned sensing operation (e.g., sensing operation based on FIG. 6) can be set / allocated separately from the time / frequency resources (hereinafter, communication resources) for general communication.

[0203] For example, sensing resources can be set / allocated in units of symbols in the time domain and / or resource blocks in the frequency domain. Resources other than the resources for which the sensing resources are set / allocated can be utilized as resources for general communication. That is, sensing resources and communication resources can be set / allocated based on the time-division multiplexing (TDM) method and / or the frequency-division multiplexing (FDM) method in terms of the operation of the base station / terminal. Additionally or alternatively, unlike what is illustrated in FIG. 10, sensing resources can also be set / allocated based on other units in the time domain (e.g., slots, frames, absolute time (ms, us), etc.) and / or other units in the frequency domain (e.g., subcarriers, carriers, absolute frequencies (MHz, GHz), etc.).

[0204] Additionally or alternatively, in connection with the setting / allocation / scheduling of resources for general communication as described herein, the relationship between the resources and the aforementioned sensing resources may need to be considered. For example, when setting / allocating resources for general communication according to the embodiment(s) of the present disclosure, the resources may be set / allocated to rate-match or puncture the resource region corresponding to the sensing resource. For example, when scheduling resources for general communication according to the embodiment(s) of the present disclosure, the resources may be scheduled so as not to overlap with the resource region corresponding to the sensing resource. If the resources for general communication according to the embodiment(s) of the present disclosure and the resource region corresponding to the sensing resource are set / allocated / scheduled to overlap, one or both operations may be dropped, skipped, or postponed based on priorities, predefined rules, etc. That is, in the embodiment(s) of the present specification, it may be desirable that resources related to general communication (e.g., resources for signals / channels related to UL / DL / Sidelink-based data / control, etc.) are set / allocated / scheduled so as not to overlap with the sensing resources described above.

[0205] Additionally, various channel modeling methods may be applied in connection with the wireless sensing described herein. Channel modeling related to sensing may refer to configuring a path for transmitting and receiving sensing signals and / or scattered / reflected signals, taking into account the object being sensed and / or the environment in which the object resides. Channel modeling may be related to the performance / requirements of sensing in wireless communication systems, and thus may be an important factor in validating the sensing function.

[0206] Channels related to sensing can be divided into channels between objects (e.g., targets of interest) and sensing transmitters / receivers, and channels between the environment to which the object belongs and sensing transmitters / receivers. In this regard, channel modeling related to sensing can be divided based on sensing mode (e.g., the six types of modes described above), whether there is an object / environment, and / or sensing scenarios. For example, channel modeling for a target in a base station / terminal-based monostatic sensing mode, channel modeling for a target in a base station / terminal-based bistatic sensing mode, channel modeling for the environment in a base station / terminal-based monostatic sensing mode, and channel modeling for the environment in a base station / terminal-based bistatic sensing mode can be configured and optimized differently. For example, when various sensing scenarios are classified, channel modeling for detection, location, and tracking scenarios, channel modeling for motion recognition, and channel modeling for imaging / environment reconstruction scenarios can be divided, etc. Additionally, channel modeling related to sensing may be based on statistical channel modeling techniques and / or deterministic channel modeling techniques. For example, modeling for sensing in a wireless communication system based on a 6G network of the present disclosure may be based on stochastic geometric channel modeling techniques and / or hybrid with ray tracing channel modeling techniques. Here, the stochastic geometric channel model may be based on various statistical characteristics of the channel state. Furthermore, the hybrid channel model may be based on both ray tracing techniques and stochastic techniques.In a hybrid approach, channels for objects requiring high accuracy and consistency (e.g., targets of interest) can be modeled using ray tracing techniques, while channels for the environment can be modeled using probabilistic techniques.

[0207] FIG. 7 illustrates a procedure related to a sensing operation according to one embodiment of the present disclosure. The embodiment of FIG. 7 may be combined with various embodiments of the present disclosure.

[0208] For example, in a wireless communication system based on a 6G network of the present specification, in the case of a sensing operation in which a terminal participates, the base station can check the capability of the terminal for the sensing operation (705). In this regard, the terminal may be configured to report capability information on whether it supports the sensing operation to the base station. Additionally or alternatively, if the terminal is defined in advance in the standard as supporting the sensing operation, the procedure may be omitted. In addition, in the case of a sensing operation in which only the base station participates, the base station may be configured to report capability information on whether it supports the sensing operation to an entity that configures / controls its sensing operation (e.g., a network entity at an upper level / layer of the base station).

[0209] For example, the base station may perform signaling with the terminal to exchange configuration information related to the sensing operation (710). For example, the base station may configure / instruct the terminal about the mode of the sensing operation (e.g., based on the six types of modes described above), the subject of the sensing operation (e.g., sensing transmitter, sensing receiver), the resource of the sensing operation, the target of utilizing the sensing result (e.g., type of wireless sensing service based on 6G network, trusted third party), channel modeling for sensing (e.g., channel between the base station / terminal and object / environment), etc. For example, the base station may also configure / instruct such information from a network entity at an upper level / layer of the base station.

[0210] For example, the base station and / or the terminal may perform a sensing operation based on the set / instructed information (715). For example, the base station and / or the terminal may, as a sensing transmitter and / or a sensing receiver, perform procedures such as transmitting a sensing signal, receiving a scattered / reflected signal, deriving sensing data, obtaining a sensing result through processing the sensing data, and providing the sensing result, as in FIG. 6 described above. As an example, in the operation of the base station / terminal described herein, the sensing result provided through the sensing operation may be utilized.

[0211] Power Control for BW aggregated Reference Signal

[0212] In wireless communication systems, the size or number of frequency resources used for signal / channel transmission and reception can be adjusted to improve performance. For example, transmitting and receiving nodes can simultaneously transmit or receive on multiple frequency resources to improve performance.

[0213] 3GPP NR Rel-18 will introduce a Bandwidth Aggregation (BW-agg) technique that improves positioning accuracy by simultaneously transmitting and receiving multiple reference signals (e.g., PRSs and / or SRSs) using multiple carriers (e.g., DL carriers / UL carriers) in the frequency domain. Specifically, BW-agg is a method of simultaneously transmitting and receiving PRS and / or SRS resources on different frequency resources (e.g., PFLs for PRS, UL carriers for SRS) while satisfying specific conditions. Specific conditions for BW-agg may include conditions regarding resource allocation, such as conditions for being located within an in-band contiguous carrier, conditions for period and location on the same time axis and RE mapping pattern on the frequency axis, and conditions for satisfying phase continuity between PRS / SRS resources.

[0214] As one example of the implementation of BW-agg, the transmitter can be configured to guarantee phase continuity for different frequency resources to which BW-agg is applied, and the receiver can be configured to regard different frequency resources for which phase continuity is guaranteed as a single frequency resource and apply processing such as FFT / IFFT to improve the resolution of signal detection.

[0215] Below, the BW-agg technology in the NR standard is described, but the meaning of the BW-agg term used in this specification is not limited thereto, and can be used as a term referring to a general technology that combines multiple frequency resources into one and utilizes them for signal / channel transmission.

[0216] Meanwhile, when a transmitting node simultaneously transmits multiple signals / channels at the same time, the constraints on the maximum transmission power of the transmitting node need to be considered. For example, the maximum transmission power of a terminal refers to the upper limit of the transmission power that the terminal can use at the time of transmitting a specific signal / channel. If multiple signals / channels are simultaneously transmitted through different frequency resources, the transmission power is divided and allocated to each signal / channel. In general, the amount of transmission power required for signal / channel transmission can be determined by considering the path loss that occurs in the wireless channel between the transmitting and receiving nodes. As the path loss that occurs between the transmitting and receiving nodes increases, a higher transmission power may be required, and the transmitting node can determine this within the range of the maximum transmission power. If multiple frequency resources are used for the simultaneous transmission and reception of multiple signals / channels, the sum of the transmission power in the entire frequency domain may be limited by the maximum transmission power of the transmitting node. In this case, the amount of transmission power divided and allocated to each frequency resource or signal / channel may be determined according to their importance or may be determined to be the same. The 3GPP NR standard supports the operation of allocating transmission power according to the priority of each signal / channel that has been agreed upon or indicated in advance when there are signals and / or channels that a terminal transmits simultaneously on multiple UL carriers (e.g., when the transmission opportunity of a specific signal / channel overlaps with the transmission opportunity of another signal / channel). For example, power can be allocated / determined first for a signal / channel with a higher priority within a limited transmission power range.

[0217] Likewise, when the transmission and reception of signals / channels to which BW-agg is applied is introduced, the priority of transmission power allocation needs to be defined between BW-agged signals / channels, or between BW-agged signals / channels and other signals / channels. For example, when the BW-agg technique for positioning SRS discussed in Rel-18 NR is introduced, the priority of transmission power allocation needs to be determined between SRS resources to which BW-agg is applied, or between SRS resources to which BW-agg is applied and other signals / channels, and the operation of the terminal based on this needs to be defined. This may be for the purpose of providing a differentiated operation method that is different from the existing method in order to improve the efficiency of the desired performance and to reflect the relative characteristics and advantages of BW-agg compared to the transmission forms of other signals / channels (e.g., providing positioning performance with higher resolution, relative reduction in transmission power per RE due to the use of a wide frequency band).

[0218] In one embodiment of the present specification, the operation of a base station and a terminal for applying a BW aggregation technique to the transmission and reception of SRS for positioning (hereinafter referred to as SRS-p) and the signaling methods related thereto are dealt with. In this embodiment, UL positioning is mainly described with the BW aggregation technique of SRS-p, but the application of the present disclosure is not limited to SRS-p and can be generally applied to BW aggregation situations of other UL signals or DL ​​signals. The methods proposed in this specification can be applied to all types of transmission and reception methods and positioning techniques expected by the base station and the terminal. The proposed methods can be used for the ISAC described above, in which case the SRS can be replaced with a sensing signal for ISAC.

[0219] Furthermore, the present disclosure can be applied to communication systems such as LTE, NR, and / or 6G, where BW aggregation operations of various RSs, including SRS-p, are performed, or where similar operations are used. Therefore, the proposed methods can be applied to all types of wireless communication systems expected by base stations and terminals.

[0220] In addition, the present disclosure can be applied not only to a case where multiple signals / channels are transmitted and received through multiple frequency resources, but also to a case where one signal / channel is transmitted and received through multiple frequency resources (e.g., a case where one PRS / SRS resource spans multiple PFL / UL carriers).

[0221] Each method proposed in this specification can operate independently without separate combinations, or one or more methods can be combined to operate in a linked manner. Some terms, symbols, and sequences used for explanation may be replaced with other terms, symbols, or sequences.

[0222] According to one embodiment, we propose operations of a terminal and a base station for BW aggregation of SRS-p transmitted and received through the same antenna under intra-band contiguous carrier conditions and signaling methods to support the same.

[0223] For example, a terminal may be configured with multiple carriers capable of transmitting SRS-p, and transmission of BW-agged SRS-p (hereinafter referred to as BW-agg-SRS-p) may be scheduled by bundling the SRS-p configured on each carrier. In this case, a case is considered where transmission of another signal / channel is scheduled on a transmission opportunity (or time resource) on which BW-agg-SRS-p is transmitted. Transmission of the other signal / channel may include transmission of another BW-agg-SRS-p. The other signal / channel may be scheduled on a different carrier from the carriers on which BW-agg-SRS-p is transmitted, or may overlap on some of the carriers on which BW-agg-SRS-p is transmitted (i.e., transmission of SRS-p on some other carriers is not overlapped). Considering a situation where BW-agg-SRS-p and other signals / channels share the transmission power of the terminal, if the transmission power in that transmission opportunity exceeds the maximum transmission power that the terminal can transmit, a priority rule for determining the transmission power proposed in the present disclosure may be applied.

[0224] The operation of the terminal and the base station to which the method proposed in this disclosure is applied may follow FIGS. 8 and 9, but this is an example to which this disclosure is applied, and the procedure and order may be changed.

[0225] Figure 8 illustrates an example of the proposed terminal operation.

[0226] Referring to FIG. 8, the terminal can report its UE capability for transmission of BW-agg-SRS-p to the base station (FC101).

[0227] The terminal can receive configuration information for UL signals / channels including BW-agg-SRS-p (FC102). At this time, the configuration information may be, for example, a higher layer signal transmitted by a base station, such as dedicated RRC signaling or SIB, and may include information on a UL carrier on which SRS-p resources constituting BW-agg-SRS-p are transmitted and information on the transmission time. If the BW-agg-SRS-p or another signal / channel has the characteristic of periodic transmission indicated by a higher layer signal, the terminal can receive information indicating the start of transmission of the corresponding BW-agg-SRS-p or signal / channel. If the transmission of BW-agg-SRS-p or other signals / channels has the characteristics of semi-persistent transmission (e.g., activation / deactivation is indicated by MAC CE) or aperiodic / dynamic transmission triggered by DCI, the terminal can monitor / receive L1 / L2 signals indicating the start of such transmission (FC103). In this case, reception of signaling indicating transmission of BW-agg-SRS-p (FC104) and signaling indicating transmission of other signals / channels (FC105) can be performed through the same or separate signaling. If the position of a transmission opportunity where BW-agg-SRS-p is transmitted overlaps with the transmission opportunity where the transmission of other signals / channels is performed (e.g., there is at least one overlapping symbol), the terminal can decide to allocate transmission power to each BW-agg-SRS-p and other signals / channels according to the proposed method. For example, if the total transmission power required for each transmission exceeds the maximum transmission power of the terminal, the method proposed in the present disclosure can be applied to determine the priority of transmission power and perform transmission power allocation based thereon (FC106).Afterwards, the terminal can perform transmission of a signal / channel other than BW-agg-SRS-p using the size of the transmission power determined above (FC107).

[0228] Figure 9 illustrates an example of the proposed base station operation. The base station can receive UE capability for transmission of BW-agg-SRS-p reported by the terminal (FC201). Thereafter, the base station can determine / generate configuration information for UL signals / channels including BW-agg-SRS-p and transmit it to the terminal (FC202). The configuration information can be transmitted through a higher layer signal transmitted by the base station, such as, for example, dedicated RRC signaling or SIB, and can include information about the UL carrier on which the SRS-p resources constituting the BW-agg-SRS-p are transmitted and information about the transmission time. If the BW-agg-SRS-p or another signal / channel has the characteristic of periodic transmission (indicated by a higher layer signal), information indicating the start of transmission of the corresponding BW-agg-SRS-p or signal / channel can be transmitted. If the transmission of BW-agg-SRS-p or other signals / channels has the characteristics of semi-persistent transmission (e.g., activation / deactivation is indicated by MAC CE) or aperiodic / dynamic transmission triggered by DCI, the base station can transmit L1 / L2 signals indicating the start of such transmission at a set time / frequency position (FC203). At this time, the signaling indicating the transmission of BW-agg-SRS-p (FC204) and the signaling indicating the transmission of the other signals / channels (FC205) can be indicated through the same or separate signaling. Thereafter, the base station can receive them through the time / frequency transmission resources of the set BW-agg-SRS-p and other signals / channels and perform measurements if necessary (FC206).

[0229] [Proposal 1] Prioritization between BW-aggregated SRS and other signals / channels for transmission power reduction

[0230] As an example, we propose a method for determining transmission power priorities by considering the maximum transmission power of a terminal in a transmission opportunity of BW-agg-SRS-p. Specifically, Proposal 1 can be applied for transmission power reduction when the sum of the transmission power required for transmission of BW-agg-SRS-p and a specific other signal / channel in a transmission opportunity (e.g., the transmission power derived by a combination of measured pathloss and transmission power-related parameters, etc.) exceeds the maximum transmission power of the terminal.

[0231] Through the proposed method, the priority conditions of the transmission power of all SRS-p resources constituting BW-agg-SRS-p with respect to other signals / channels may be determined / set. For example, if BW-agg-SRS-p has a high transmission power priority with respect to a specific signal / channel, all SRS-p resources constituting BW-agg-SRS-p may be determined / set to have a high transmission power priority with respect to the specific signal / channel, and conversely, if BW-agg-SRS-p has a low transmission power priority with respect to a specific signal / channel, all SRS-p resources constituting BW-agg-SRS-p may be determined / set to have a low transmission power priority with respect to the specific signal / channel. The transmission power priorities among the SRS-p resources constituting BW-agg-SRS-p may follow a predetermined method (e.g., same transmission power priority), and the application of the present disclosure is not proposed depending on the method.

[0232] For example, the transmission power priority between BW-agg-SRS-p and other signals / channels can be determined separately depending on the target signal / channel. The following options can be applied to determine the priority for each situation. The options below can operate individually, or two or more options can be combined.

[0233] Option 1-1) Assign high transmit power priority to BW-agg-SRS-p

[0234] The method proposed in the present disclosure may include a method of determining that transmission of BW-agg-SRS-p has a higher transmission power priority than other signals / channels. For example, the other signals / channels may be other SRSs or SRS-p to which BW-agg is not applied. In the case where distance information between a terminal and a base station is to be measured through transmission and reception of SRS-p or SRS (e.g., for the purpose of positioning), high accuracy can be stably obtained by giving transmission power priority to BW-agg-SRS-p that is transmitted and received using more carriers.

[0235] As an example applied in the 3GPP NR standard, we can consider a situation where SRS-p resources that satisfy specific conditions for BW-agg (e.g., intraband contiguous carriers, same periodicity and offset, same spatial relation, etc.) constitute BW-agg-SRS-p, and SRS-p (or SRS) resources are scheduled to be transmitted at locations of other UL carriers where BW-agg-SRS-p is not transmitted. In this case, if the transmission opportunities of the BW-agg-SRS-p and SRS-p resources overlap in the time domain and the UE must perform simultaneous transmission at locations of all or some symbol(s), and if the sum of the required transmission powers at the locations of the symbol(s) exceeds the maximum transmission power of the UE, option 1-1 can be applied to give higher transmission power priority to the transmission of BW-agg-SRS-p. However, if there is another transmission power priority determination method that should be considered in advance of the method proposed in option 1-1 and the priority can be determined by this method, that method may be followed.

[0236] Figure 10 illustrates an example of a scheduling situation in which high transmission power priority is given to BW-agg-SRS-p. In Figure 10, transmission of BW-agg-SRS-p (FC403) is scheduled by setting BW-agg for SRS-p resource (FC401) set for Carrier 1 and SRS-p resource (FC402) set for Carrier 2. At this time, it is assumed that transmission of SRS-p resource (FC404) set for Carrier 3 is also scheduled on the transmission opportunity of BW-agg-SRS-p (FC403). At this time, if a specific transmission power priority condition that is considered in a faster order than option 1-1 is set, but this does not determine the transmission power priority between BW-agg-SRS-p (FC403) and SRS-p resource (FC404) (e.g., the specific transmission power priority condition does not specify the priority between BW-agg-SRS-p (FC403) and SRS-p resource (FC404) or they have the same priority in the specific transmission power priority condition), the terminal can determine the transmission power priority according to the proposed method of option 1-1. In the case of FIG. 10, a higher transmission power priority can be given to BW-agg-SRS-p (FC403) than to SRS-p resource (FC404).

[0237] As an example applied in the 3GPP NR standard, a situation may be considered in which SRS-p resources satisfying specific conditions for BW-agg (e.g., intraband contiguous carriers, same periodicity and offset, same spatial relation, etc.) constitute BW-agg-SRS-p, and SRS-p (or SRS) resources are scheduled to be transmitted in some positions of the UL carrier on which the BW-agg-SRS-p is transmitted. In this case, if the transmission opportunities of the BW-agg-SRS-p and SRS-p resources overlap and the UE must perform simultaneous transmission in all or some symbol(s) positions, and if the sum of the required transmission powers in the positions of the symbol(s) exceeds the maximum transmission power of the UE, option 1-1 may be applied to give a higher transmission power priority to the transmission of BW-agg-SRS-p. However, if there is a transmission power priority determination method that should be considered in advance of the method proposed in option 1-1 and the priority is determined in advance by this method, that method may be followed.

[0238] Fig. 11 illustrates another example of a scheduling situation in which high transmission power priority is given to BW-agg-SRS-p. In Fig. 11, BW-agg is set for the SRS-p resource (FC501) set for Carrier 1, the SRS-p resource (FC502) set for Carrier 2, and the SRS-p resource (FC503) set for Carrier 3, and transmission of BW-agg-SRS-p (FC504) is scheduled. At this time, transmission of the SRS-p resource (FC505) set for Carrier 3 is also scheduled on some symbols of the transmission opportunity of the BW-agg-SRS-p. The SRS-p resource (FC505) to which BW-agg is not applied set in Carrier 3 has a higher transmission priority (e.g., transmission priority set / defined separately from power priority) than the SRS-p resource (FC503) that constitutes BW-agg-SRS-p, and accordingly, the SRS-p resource (FC503) that constitutes BW-agg-SRS-p at the position of the overlapped symbol may be dropped, and the SRS-p resource (FC505) to which BW-agg is not applied may be transmitted. Meanwhile, if a transmission power priority condition that is considered in an order faster than option 1-1 can be set, and the transmission power priority cannot be determined between BW-agg-SRS-p (FC504) and SRS-p resource (FC505) even through the transmission power priority condition considered in an order faster, the terminal may determine the transmission power priority according to the proposed method of option 1-1. For the example of Fig. 11, BW-agg-SRS-p (FC504) (i.e., BW-agg-SRS-p consisting of FC501 and FC502) may be given a higher transmission power priority than the SRS-p resource (FC505).

[0239] Option 1-1 has the advantageous effect of allowing the terminal to prioritize SRS-p transmission, which is more suitable for improving positioning accuracy, without separate signaling overhead by giving priority to the transmission power of BW-agg-SRS-p.

[0240] Option 1-2) Assign high transmission power priority to BW-agg-SRS-p consisting of more carriers.

[0241] The method proposed in the present disclosure may include a method of determining that the configuration of BW-agg-SRS-p has a higher transmission power priority as it includes more carriers. This allows for stable and high accuracy to be obtained by giving priority to transmission power for BW-agg-SRS-p that is transmitted and received using more carriers when measuring distance information between a terminal and a base station through transmission and reception of SRS-p or SRS (e.g., for positioning purposes).

[0242] As an example applied in the 3GPP NR standard, a situation can be considered in which SRS-p resources satisfying specific conditions for BW-agg (e.g., intraband contiguous carriers, same periodicity and offset, same spatial relation, etc.) on M UL carriers are configured to form one BW-agg-SRS-p (hereinafter, BW-agg-SRS-p#M), and SRS-p resources satisfying specific conditions for BW-agg on N UL carriers different from the M UL carriers are configured to form one BW-agg-SRS-p (hereinafter, BW-agg-SRS-p#N) and are scheduled for transmission. In this case, if M>N, and the transmission opportunities of the above BW-agg-SRS-p#M and BW-agg-SRS-p#N overlap, so that the terminal must perform simultaneous transmission at all or some symbol(s) positions, and if the sum of the transmission powers required at the positions of the above symbol(s) exceeds the maximum transmission power of the terminal, option 1-2 may be applied to give a higher transmission power priority to the transmission of BW-agg-SRS-p#M. However, if there exists a transmission power priority determination method that should be considered in advance of the method proposed in option 1-2 and the priority by this is determined in advance, this may be followed.

[0243] Fig. 12 illustrates an example in which the power priority of BW-agg-SRS-p is determined based on the number of carriers. Fig. 12 illustrates a situation in which BW-agg is set for SRS-p resources set to Carriers 1 to 3 (respectively, FC601, FC602, and FC603) and transmission of BW-agg-SRS-p (FC604) including three UL carriers is scheduled, and BW-agg is set for SRS-p resources set to Carriers 4 to 5 (respectively, FC605 and FC606) and transmission of BW-agg-SRS-p (FC607) including two UL carriers is scheduled. When transmission opportunities of BW-agg-SRS-p (FC604) including three UL carriers and BW-agg-SRS-p (FC607) including two UL carriers overlap, the UE can determine the transmission power to be allocated to each SRS-p resource by considering the priority of the transmission power. If the transmission power priority condition(s) considered in an order earlier than option 1-2 are set / defined but the transmission power priority cannot be determined between the transmission of BW-agg-SRS-p (FC604) including three UL carriers and BW-agg-SRS-p (FC607) including two UL carriers, the UE can determine the transmission power priority according to the proposed method of option 1-2. In Fig. 12, a higher transmission power priority can be given to BW-agg-SRS-p (FC604) including three carriers.

[0244] Option 1-2 has the advantage that when it is necessary to determine transmission power priorities between different BW-agg-SRS-p, the terminal can prioritize SRS-p transmissions that are more suitable for improving positioning accuracy without separate signaling overhead.

[0245] Option 1-2-a) How to give higher transmission power priority to BW-agg-SRS-p consisting of larger BW

[0246] The transmission power priority determination method based on the UL carrier count condition proposed in the above option 1-2 can be replaced with a condition on the size of the total BW that the transmission of BW-agg-SRS-p spans. For example, a situation can be considered where two BW-agg-SRS-p with overlapping transmission opportunities are set, and the total BW size over which one of them, BW-agg-SRS-p#P, is transmitted is P, and the total BW size over which the other one, BW-agg-SRS-p#Q, is transmitted is Q. At this time, if P>Q, and the transmission opportunities of the above BW-agg-SRS-p#P and BW-agg-SRS-p#Q overlap, so that the terminal must perform simultaneous transmission at the positions of all or some symbol(s), and if the sum of the transmission powers required at the positions of the above symbol(s) exceeds the maximum transmission power of the terminal, option 1-2-a may be applied to determine that a higher transmission power priority is given to the transmission of BW-agg-SRS-p#P. However, if there exists a transmission power priority determination method that should be considered in advance of the method proposed in option 1-2-a and the priority by this method is determined in advance, then that method shall be followed.

[0247] The method proposed in Option 1-2-a can also be used when determining the transmission power priority between different BW-agg-SRS-p having the same number of UL carriers used in the configuration, and can also be used as a method to replace the method of Option 1-2 or to be applied subsequently when the transmission power priority is not determined by the method of Option 1-2 (e.g. when the number of UL carriers used in the configuration of the target BW-agg-SRS-p is the same).

[0248] Option 1-3) A method to follow the transmission power priority of a specific carrier among the UL carriers that constitute BW-agg-SRS-p.

[0249] We propose a method for determining the transmission power priority of BW-agg-SRS-p based on the transmission power priority of a specific UL carrier among the UL carriers used in the configuration of BW-agg-SRS-p. For example, the specific UL carrier may be a carrier having the highest transmission power priority among the UL carriers used in the configuration of BW-agg-SRS-p.

[0250] The transmission power priority determined for the above UL carrier may consider, for example, the following detailed options. If more than one detailed option is considered, there is an order of application among the detailed options, and a UL carrier including a detailed option with a faster order may be determined to have a higher transmission power priority.

[0251] (i) Sub-Option 1-3-1: High priority is given to the SRS-p resource set on the primary cell, which may be the PCell of the MCG or the PSCell of the SCG. Specifically, if the SRS-p resources that constitute BW-agg-SRS-p include an SRS-p resource set on the primary cell, the transmission power priority of the BW-agg-SRS-p may be set to be higher than that of the BW-agg-SRS-p that does not include the SRS-p resource.

[0252] (ii) Sub-Option 1-3-2: Give high priority to a UL carrier configured for PUCCH transmission. Specifically, if a UL carrier configured for PUCCH transmission is included among SRS-p resources constituting a specific BW-agg-SRS-p, and PUCCH transmission is not configured in any SRS-p resources constituting other BW-agg-SRS-p, the UE may give transmission power priority to the specific BW-agg-SRS-p including the UL carrier configured for PUCCH transmission. As a modified method of Sub-option 1-3-2, a method may be considered of comparing the number of UL carriers configured for PUCCH transmission among UL carriers constituting BW-agg-SRS-p, and giving high transmission power priority to BW-agg-SRS-p transmission having a larger number of UL carriers configured for PUCCH transmission.

[0253] (iii) Sub-Option 1-3-3: Gives high priority to non-supplementary UL carriers. Specifically, sub-option 1-3-3 can be considered as a method applied when there is no UL carrier configured for PUCCH transmission on any BW-app-SRS-p that is the target of determining transmission power priority. In this case, for example, among the SRS-p resources that constitute a specific BW-agg-SRS-p, a BW-agg-SRS-p configuration that does not include a supplementary UL carrier can be set to have a higher priority than a BW-agg-SRS-p configuration that includes a supplementary UL carrier. As another example, a BW-agg-SRS-p transmission that includes more non-supplementary UL carriers among the SRS-p resources that constitute a particular BW-agg-SRS-p may be given higher priority than other BW-agg-SRS-p configurations, or a BW-agg-SRS-p transmission that includes fewer supplementary UL carriers may be given higher priority than other BW-agg-SRS-p configurations.

[0254] As an example applied in the 3GPP NR standard, if SRS-p resources that satisfy specific conditions for BW-agg (e.g., intraband contiguous carriers, same periodicity and offset, same spatial relation, etc.) constitute BW-agg-SRS-p, and another BW-agg-SRS-p is configured at the positions of all or some symbol(s) of the above BW-agg-SRS-p transmission opportunity so that the terminal must perform simultaneous transmission, and if the sum of the transmission powers required at the positions of the above symbol(s) exceeds the maximum transmission power of the terminal, a higher transmission power priority can be given to the transmission of the BW-agg-SRS-p selected based on the methods proposed in option 1-3. However, if a transmission power priority determination method that should be considered in advance rather than the method proposed in option 1-3 exists and the priority by this method is determined in advance, that method may be followed.

[0255] The methods proposed in Option 1-3 can also be used for the purpose of determining transmission power priority between at least one BW-agg-SRS-p and other SRS-p resources (or SRS-resources). As an example applied in the 3GPP NR standard, if SRS-p resources that satisfy specific conditions for BW-agg (e.g., intraband contiguous carriers, same periodicity and offset, same spatial relation, etc.) constitute BW-agg-SRS-p, and other SRS-p resources (or SRS-resources) are set at positions of all or some symbol(s) of the above BW-agg-SRS-p transmission opportunities so that the UE must perform simultaneous transmission, and if the sum of the transmission powers required at the positions of the above symbol(s) exceeds the maximum transmission power of the UE, a higher transmission power priority can be given to the transmission of the BW-agg-SRS-p selected based on the methods proposed in Option 1-3. At this time, the condition for the above SRS-p resource (or SRS-resource) can be determined by whether the UL carrier on which the SRS-p resource (or SRS-resource) is transmitted satisfies the priority condition for the UL carrier considered in option 1-3. However, if there is a transmission power priority determination method that should be considered in advance of the method proposed in option 1-3 and the priority by this method is determined in advance, that method can be followed.

[0256] Fig. 13 illustrates an example of determining the transmission power of BW-agg-SRS-p according to the transmission power priority of a specific carrier. In the example of Fig. 13, BW-agg is set for SRS-p resource (FC701) set for Carrier 1 and SRS-p resource (FC702) set for Carrier 2, and transmission of one BW-agg-SRS-p (FC703) is scheduled, and BW-agg is set for SRS-p resource (FC704) set for Carrier 3 and SRS-p resource (FC705) set for Carrier 4, and transmission of another BW-agg-SRS-p (FC706) is scheduled. When the transmission opportunities of two BW-agg-SRS-p overlap, the terminal can determine the amount of transmission power allocated to each SRS-p resource by considering the priority of the transmission power. If transmission power priority conditions that are considered in a faster order than option 1-3 are set / defined but the transmission power priority cannot be determined through them, the terminal can determine the transmission power priority according to the proposed method of option 1-3. In Fig. 13, it is assumed that Carrier 1 is a PCell, and the configuration of BW-agg-SRS-p including Carrier 1 has a higher priority than other BW-agg-SRS-p.

[0257] The method proposed in Option 1-3 has the advantage of allowing the terminal to prioritize transmission power based on the usage purpose or set status among multiple UL carriers available to the terminal without incurring separate signaling overhead.

[0258] Option 1-4) Method of assigning transmission power priority based on priority indicator

[0259] The method proposed in the present disclosure may include a method of determining transmission power priority by including information of a priority indicator in the configuration information of BW-agg-SRS-p, and determining transmission power priority according to the information provided by the priority indicator. For example, the priority indicator may be included in the configuration information of BW-agg-SRS-p or the configuration information of SRS-p resources constituting BW-agg-SRS-p, and may be configured by a base station and provided to a terminal. For example, one or more levels may be defined for the priority indicator, and if multiple levels are defined, the priority of transmission power may be determined according to the ascending order (or descending order) of the values ​​expressed by the priority indicator.

[0260] As an example applied in the 3GPP NR standard, SRS-p resources that satisfy specific conditions for BW-agg (e.g., intraband contiguous carriers, same periodicity and offset, same spatial relation, etc.) form BW-agg-SRS-p, and a priority indicator is provided for information indicating the BW-agg operation (hereinafter referred to as PI-A), and another BW-agg-SRS-p is set with a priority indicator (hereinafter referred to as PI-B) at positions of all or some symbol(s) of the above BW-agg-SRS-p transmission opportunity so that the terminal must perform simultaneous transmission, and if the sum of the transmission powers required at the positions of the above symbol(s) exceeds the maximum transmission power of the terminal, this can be considered. In this case, if the priority of PI-A is higher than that of PI-B, the method proposed in option 1-4 can be applied to grant a higher transmission power priority to the BW-agg-SRS-p corresponding to PI-A. However, if there is a transmission power priority determination method that should be considered in advance of the method proposed in option 1-4 and the priority is determined in advance by this method, that method may be followed.

[0261] As another example applied in the 3GPP NR standard, SRS-p resources that satisfy specific conditions for BW-agg (e.g. intra band contiguous carriers, same periodicity and offset, same spatial relation, etc.) constitute BW-agg-SRS-p, and a priority indicator is provided in the configuration information of a specific SRS-p resource (or UL carrier) constituting the BW-agg-SRS-p (hereinafter referred to as PI-C), and a priority indicator is provided in the configuration information of a specific SRS-p resource (or UL carrier) at positions of all or part of symbol(s) of the BW-agg-SRS-p transmission opportunity (hereinafter referred to as PI-D) are configured together with other BW-agg-SRS-p so that a terminal must perform simultaneous transmission, and if the sum of the transmission powers required at positions of the symbol(s) exceeds the maximum transmission power of the terminal, it can be considered. In this case, if the priority of PI-C is higher than that of PI-D, the method suggested in option 1-4 can be applied to give higher transmission power priority to BW-agg-SRS-p corresponding to PI-C. In a situation like the example, if there are multiple SRS-p resources with different priority indicators among the SRS-p resources that constitute one BW-agg-SRS-p, the priority indicator with the highest priority (or the lowest priority) can be set as the priority indicator corresponding to the BW-agg-SRS-p. However, if there is a method for determining transmission power priorities that should be considered before the method suggested in option 1-4 and the priorities by such a method have been determined in advance, that method can be followed.

[0262] The method proposed in Option 1-4 allows the base station to control terminal operation by setting the priority of transmission power.

[0263] [Proposal 2] Order of application among multiple transmission power reduction rules

[0264] There may be multiple conditions for determining transmission power priorities for transmission power reduction purposes considering BW-aggregated SRS, considering the relationships with various signals / channels and their respective characteristics. Furthermore, if a transmission power priority determination method exists to support existing terminals that do not support BW-agg, conditions under which existing and new methods are combined or applied need to be considered. If multiple conditions are supported / configured to determine transmission power priorities, and the resulting transmission power priorities may differ from each other, ambiguity may arise in the operations of the base station and the terminal. Considering this, Proposal 2 describes the order of application of the proposed methods when the transmission power priority determination method considering BW-agg-SRS-p in Proposal 1 is introduced. Furthermore, Proposal 2 proposes the order of application between the existing transmission power priority determination method and the transmission power priority determination method proposed in this disclosure, considering a case where the existing transmission power priority determination method is applied together.

[0265] According to the proposed method below, the transmission power priority determination methods sequentially determine priorities based on the listed order. If the transmission power priority determination method with the preceding order determines the transmission power priority among all signals / channels, the transmission power priority determination procedure is terminated and the determined priority is followed. If signals / channels with the same priority remain, the transmission power priority determination method with the subsequent order can be applied.

[0266] In a specific way, based on the 3GPP NR standard, the transmission power priority determination conditions described below are determined to be applied in order, and if the transmission power priority is not determined even after all of the following orders are completed, additional transmission power priority conditions may be determined to be considered.

[0267] 1) PRACH transmission on PCell

[0268] 2) PUCCH or PUSCH transmission with high priority index

[0269] 3) PUCCH or PUSCH transmission with the same priority index

[0270] i) PUCCH transmission including HARQ-ACK, SR, and / or LRR, or PUSCH transmission including HARQ-ACK of the corresponding priority index.

[0271] ii) PUCCH transmission including CSI or PUSCH transmission including CSI

[0272] iii) PUSCH transmission on Pcell in case of PUSCH transmission and Type 2 random access procedure that does not include HARQ-ACK or CSI of the corresponding priority index.

[0273] 4) Aperiodic SRS transmission with higher priority than semi-permanent and / or periodic SRS, or PRACH transmission on a serving cell other than a Pcell.

[0274] If there are signals / channels for which the transmission power priority has not been determined even after all of the above 1) to 4) sequences have been completed, and especially if the determination of the transmission power priority for BW-agg-SRS-p is required, the following embodiments may be considered as specific methods for determining the additional transmission power priority conditions to be applied and the order of their application.

[0275] (Example 2-1)

[0276] 5) SRS-p resources belonging to BW-agg-SRS-p

[0277] - i) SRS-p resources belonging to BW-agg-SRS-p with more UL carriers.

[0278] - ii) BW-agg-SRS-p including SRS-p resources on UL carriers with higher transmit power priority.

[0279] In Example 2-1, the order of applying conditions is shown in which whether BW-agg-SRS-p is set is determined as a priority (i.e., Proposal 1, Option 1-1), if it is necessary to determine transmission power priorities for multiple BW-agg-SRS-p, the BW-agg operation configured with more UL carriers is used as a standard (i.e., Proposal 1, Option 1-2), and if there are multiple BW-agg-SRS-p configured with the same number of UL carriers, the transmission power priorities are determined based on the UL carriers on which BW-agg-SRS-p is set (i.e., Proposal 1, Option 1-3). In this embodiment, the method may be advantageous in improving positioning accuracy by giving priority to BW-agg-SRS-p using a wider BW.

[0280] (Example 2-2)

[0281] 5) SRS-p resources belonging to BW-agg-SRS-p

[0282] - i) SRS-p resources belonging to BW-agg-SRS-p corresponding to a higher priority indicator.

[0283] - ii) SRS-p resources belonging to BW-agg-SRS-p with more UL carriers.

[0284] - iii) BW-agg-SRS-p including SRS-p resources on UL carriers with higher transmission power priority.

[0285] In Example 2-2, the order of condition application is shown in which whether BW-agg-SRS-p is set is determined as a priority (i.e., Proposal 1, Option 1-1), if it is necessary to determine transmission power priorities for multiple BW-agg-SRS-p, the priority indicator set by the base station and received and operated by the terminal is preferentially utilized (i.e., Proposal 1, Option 1-4), if it is necessary to determine transmission power priorities between different BW-agg-SRS-p having the same priority indicator index, the BW-agg operation configured with more UL carriers is used as a standard (i.e., Proposal 1, Option 1-2), and thereafter, if necessary, the transmission power priorities are determined based on UL carriers on which BW-agg-SRS-p is set (i.e., Proposal 1, Option 1-3). In this embodiment, a device can be provided that prioritizes the transmission power of BW-agg-SRS-p to achieve high positioning accuracy, while at the same time allowing the base station to control the transmission power priority between BW-agg-SRS-p.

[0286] (Example 2-3)

[0287] 5) SRS-p resources corresponding to a higher priority indicator or SRS-p resources belonging to BW-agg-SRS-p.

[0288] 6) SRS-p resources belonging to BW-agg-SRS-p

[0289] - i) SRS-p resources belonging to BW-agg-SRS-p with more UL carriers.

[0290] - ii) BW-agg-SRS-p including SRS-p resources on UL carriers with higher transmit power priority.

[0291] In Example 2-3, regardless of BW-agg, the priority indicator set by the base station and received and operated by the terminal is preferentially utilized (i.e., Proposal 1, Option 1-4), if BW-agg-SRS-p and SRS-p (or SRS) resources having the same priority indicator index exist, the priority between them is determined based on whether BW-agg is applied (i.e., Proposal 1, Option 1-1), if it is necessary to determine the transmission power priority between different BW-agg-SRS-p having the same priority indicator index, the BW-agg operation configured with more UL carriers is used as a standard (i.e., Proposal 1, Option 1-2), and if necessary, the transmission power priority is determined based on UL carriers on which BW-agg-SRS-p is set (i.e., Proposal 1, Option 1-3). This shows the order of condition application.

[0292] In this embodiment, the freedom of the base station is increased by providing a description that allows the base station to set and indicate priority between SRSs before BW-agg, and if not set, BW-agg-SRS-p, which uses a wider BW, is given priority, thereby supporting improved positioning accuracy as a basic operation.

[0293] Fig. 14 illustrates a flowchart of a signal transmission method of a wireless communication device according to one embodiment.

[0294] Referring to FIG. 14, the wireless communication device can determine the transmission power of each of a plurality of reference signals including a first reference signal and a second reference signal (1505).

[0295] The wireless communication device can transmit at least one of the plurality of reference signals based on the determined transmission power (1510).

[0296] Bandwidth (BW) aggregation across multiple carriers is set for the first reference signal, and transmission power may be allocated to the bandwidth-aggregated first reference signal with a higher priority than the second reference signal based on the first reference signal at least partially overlapping with the second reference signal in the time domain.

[0297] Based on the sum of the power required for the first reference signal and the power required for the second reference signal exceeding the maximum transmission power of the wireless communication device, transmission power may be allocated to the first reference signal with the high priority within the maximum transmission power range.

[0298] The second reference signal may be assigned reduced transmission power.

[0299] The above plurality of reference signals may further include a third reference signal for which bandwidth aggregation is set.

[0300] For example, based on the fact that the first reference signal at least partially overlaps with the third reference signal in the time domain, transmission power may be allocated with higher priority to a reference signal set across more carriers among the first reference signal and the third reference signal.

[0301] For example, based on the fact that the first reference signal at least partially overlaps with the third reference signal in the time domain, transmission power may be allocated with higher priority to a reference signal set over a wider frequency band among the first reference signal and the third reference signal.

[0302] For example, transmission power may be allocated to the first reference signal with a higher priority than the third reference signal based on the fact that the carrier having the highest priority among the plurality of carriers for which the first reference signal is set has a higher priority than the carrier having the highest priority among the plurality of carriers for which the third reference signal is set.

[0303] For example, the wireless communication device may be a terminal. The first reference signal may be a sounding reference signal (SRS) for positioning.

[0304] For example, the wireless communication device may be a base station. The plurality of reference signals may be downlink reference signals.

[0305] Figure 15 illustrates a flexible network topology to which some examples of this specification may be applied.

[0306] To compensate for incomplete network coverage areas, a network topology that allows for more flexible and resilient split radio access networks (RANs) may be considered. For this purpose, various nodes, such as IAB nodes, relays, and RF repeaters, as illustrated in the example of Figure 15, may be applied, or NTNs may be integrated. For example, an IAB node may correspond to a node that provides wireless backhaul. For example, a relay may refer to any intermediate point, or in the case of a sidelink relay where a terminal functions as a relay, it may collectively refer to a terminal-to-network (U2N) relay and a terminal-to-terminal (U2U) relay. For example, an RF repeater may correspond to a node that simply performs the function of signal amplification and forwarding, while a network-controlled repeater may not only amplify and forward signals but also adjust transmission and reception settings based on information provided by the network. For example, an NTN node may correspond to a satellite or aircraft that provides NTN coverage that is difficult for terrestrial networks to provide. In addition to these examples, various intermediate points can be introduced to improve the network topology.

[0307] Referring to Figure 15, a split RAN can support the division of a base station into a centralized unit (CU) and one or more distributed units (DUs). The CU and DU can correspond to logical units. The CU can be further divided into a control plane (CP) portion and one or more user plane (UP) portions. Since a failure in the CU-CP affects not only the CU-UP but also the DUs, various intermediate points can be introduced to compensate for this.

[0308] An intermediate point may correspond to a terminal or a base station, depending on its relationship to other nodes. For example, an IAB node may include a mobile-termination (MT) portion and a unit (DU). The MT may connect the IAB node to a donor node. The unit (DU) of an IAB node may serve other terminals or connect to other IAB nodes to provide multi-hop wireless backhaul to the terminal. In other words, an IAB node may correspond to a base station in its relationship to a user-side node, and to a terminal in its relationship to a network-side node.

[0309] In some examples of this specification, the description of a terminal can be equally applied not only to a user-side endpoint, but also to an intermediate point corresponding to a terminal in a relative relationship with a network-side endpoint. Similarly, in some examples of this specification, the description of a base station can be equally applied not only to a network-side endpoint, but also to an intermediate point corresponding to a base station in a relative relationship with a user-side endpoint. However, in most cases where there is no additional description of the operations of three or more entities, the communicating entities are briefly described in this specification as terminals and / or base stations (or first nodes and / or second nodes), and the terms terminal and / or base stations (or first nodes and / or second nodes) are interpreted to include / replace any endpoint or any intermediate point in relation to other nodes.

[0310] That is, in some examples of this specification, for the sake of simplicity of explanation, the subjects of the operation may be referred to as a base station and / or a terminal (or a first node and / or a second node). In addition, the terms base station and / or terminal (or a first node and / or a second node) may also be interpreted / replaced as in the following examples: For example, the base station (or a first node) and the terminal (or a second node) may respectively correspond to the first endpoint and the second endpoint; may respectively correspond to the endpoint and the intermediate point; may respectively correspond to the intermediate point and the endpoint; or may respectively correspond to the first intermediate point and the second intermediate point.

[0311] In this specification, there may be zero or more intermediate points between the base station and the terminal. If intermediate points exist, they may be IAB nodes, relays, RF repeaters, NTN (non-terrestrial network) nodes, or nodes supporting other functions. An intermediate point may be a node with a fixed location or a node with an unfixed location.

[0312] The communication system (1) of FIG. 16 applied to the present disclosure includes a wireless device (110), a network device (120), and a network (130). Here, the wireless device (110) refers to a device that performs communication using a wireless access technology (e.g., LTE, LTE-A, LTE-A pro, NR, 5G, 5G-A, 6G), and may be referred to as a communication / wireless / 5G / 6G device. Although not limited thereto, the wireless device (110) may include a robot (110a), a vehicle (110b-1, 110b-2), an XR (extended reality) device (110c), a hand-held device (110d), a home appliance (110e), an IoT (Internet of Things) device (110f), and an AI (artificial intelligence) device / server (110g). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle (110b-1, 110b-2) may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device (110c) includes an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device, and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, etc. The portable device (110d) may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), a computer (e.g., a laptop, etc.), etc. The home appliance (110e) may include a TV, a refrigerator, a washing machine, etc. The IoT device (110f) may include a sensor, a smart meter, etc. The wireless device (110) may correspond to a terminal (or first node) or an intermediate point.The network device (120) may correspond to a base station (or a second node) or another intermediate point. For example, the network device (120) may also be implemented as a wireless device (110), and a specific wireless device (120a) may act as a network device (120) to another wireless device (110).

[0313] Wireless devices (110a to 110f) can be connected to a network (130) via a network device (120). AI technology can be applied to the wireless devices (110a to 110f), and the wireless devices (110a to 110f) can be connected to an AI server (110g) via a network (130). The network (130) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR), or a 6G network. The wireless devices (110a to 110f) can communicate with each other via the network device (120) / network (130), but can also communicate directly (e.g., sidelink communication) without going through the network device (120) / network (130). For example, vehicles (110b-1, 110b-2) can communicate directly (e.g., V2V (vehicle to vehicle) / V2X (vehicle to everything) communication). Additionally, an IoT device (110f) (e.g., a sensor) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (110a to 110f).

[0314] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (110a to 110f) / network devices (120), network devices (120) / network devices (120). Here, the wireless communication / connection can be established through various wireless access technologies such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and communication between network devices (150c) (e.g., relay, IAB (integrated access backhaul)). Through the wireless communication / connection (150a, 150b, 150c), the wireless device and the network device / wireless device, and the network device and the network device can transmit / receive wireless signals to each other. For example, the wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, based on various descriptions of the present disclosure, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc. may be performed.

[0315] FIG. 17 illustrates an example of a wireless device applicable to the present disclosure.

[0316] Referring to FIG. 17, the wireless device (200) can transmit and receive wireless signals via various wireless access technologies (e.g., LTE, LTE-A, LTE-A pro, NR, 5G, 5G-A, 6G). The wireless device (200) includes at least one processor (202) and at least one memory (204), and may additionally include at least one transceiver (206) and / or at least one antenna (208).

[0317] The processor (202) controls the memory (204) and / or the transceiver (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (206). In addition, the processor (202) may receive a wireless signal including second information / signal via the transceiver (206), and then store information obtained from signal processing of the second information / signal in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may store software code including instructions for performing some or all of the processes controlled by the processor (202), or for performing the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology. The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via at least one antenna (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF (radio frequency) unit. In the present disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0318] Hereinafter, the hardware elements of the wireless device (200) will be described in more detail. Although not limited thereto, at least one protocol layer may be implemented by at least one processor (202). For example, at least one processor (202) may implement at least one layer (e.g., a functional layer such as physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), radio resource control (RRC), and service data adaptation protocol (SDAP)). At least one processor (202) may generate at least one Protocol Data Unit (PDU) and / or at least one Service Data Unit (SDU) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. At least one processor (202) may generate a message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. At least one processor (202) can generate a signal (e.g., a baseband signal) including a PDU, an SDU, a message, control information, data or information according to the functions, procedures, proposals and / or methods disclosed in this document, and provide the signal to at least one transceiver (206). At least one processor (202) can receive a signal (e.g., a baseband signal) from at least one transceiver (206) and obtain the PDU, SDU, message, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in this document.

[0319] At least one processor (202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. The at least one processor (202) may be implemented by hardware, firmware, software, or a combination thereof. For example, at least one application specific integrated circuit (ASIC), at least one digital signal processor (DSP), at least one digital signal processing device (DSPD), at least one programmable logic device (PLD), or at least one field programmable gate array (FPGA) may be included in the at least one processor (202). The descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document may be included in the at least one processor (202), or may be stored in at least one memory (204) and driven by the at least one processor (202). The descriptions, functions, procedures, suggestions, methods and / or flowcharts disclosed in this document may be implemented using firmware or software in the form of code, instructions and / or sets of instructions.

[0320] At least one memory (204) can be connected to at least one processor (202) and can store various forms of data, signals, messages, information, programs, codes, instructions and / or commands. The at least one memory (204) can be configured as a read only memory (ROM), a random access memory (RAM), an erasable programmable read only memory (EPROM), a flash memory, a hard drive, a register, a cache memory, a computer readable storage medium and / or a combination thereof. The at least one memory (204) can be located internally and / or externally to the at least one processor (202). In addition, the at least one memory (204) can be connected to the at least one processor (202) via various technologies such as a wired or wireless connection.

[0321] At least one transceiver (206) can transmit user data, control information, wireless signals / channels, etc., mentioned in the methods and / or flowcharts of this document to at least one other device. At least one transceiver (206) can receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts disclosed in this document from at least one other device. For example, at least one transceiver (206) can be connected to at least one processor (202) and can transmit and receive wireless signals. For example, at least one processor (202) can control at least one transceiver (206) to transmit user data, control information, or wireless signals to at least one other device. Furthermore, at least one processor (202) can control at least one transceiver (206) to receive user data, control information, or wireless signals from at least one other device. In addition, at least one transceiver (206) may be connected to at least one antenna (208), and at least one transceiver (206) may be configured to transmit and receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts disclosed in this document through at least one antenna (208). In this document, at least one antenna may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). At least one transceiver (206) may convert the received wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using at least one processor (202). At least one transceiver (206) may convert the processed user data, control information, wireless signals / channels, etc. from baseband signals to RF band signals using at least one processor (202).For this purpose, at least one transceiver (206) may include an (analog) oscillator and / or filter.

[0322] The components of the wireless device described with reference to FIG. 18 may be referred to by different terms in terms of functionality. For example, the processor (202) may be referred to as a control unit, the transceiver (206) as a communication unit, and the memory (204) as a storage unit. In some cases, the communication unit may be used to mean including at least a portion of the processor (202) and the transceiver (206).

[0323] The structure of the wireless device described with reference to FIG. 17 can be understood as the structure of at least a portion of various devices. For example, the structure of the wireless device illustrated in FIG. 17 can be at least a portion of various devices described with reference to FIG. A2 (e.g., a robot (110a), a vehicle (110b-1, 110b-2), an XR device (110c), a portable device (110d), a home appliance (110e), an IoT device (110f), an AI device / server (110g)). Furthermore, according to various embodiments, in addition to the components illustrated in FIG. 17, the device may further include other components.

[0324] For example, the device may be a portable device such as a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), or a portable computer (e.g., a laptop, etc.). In this case, the device may further include at least one of a power supply unit that supplies power and includes a wired / wireless charging circuit, a battery, etc., an interface unit that includes at least one port for connection with another device (e.g., an audio input / output port, a video input / output port), and an input / output unit for inputting and outputting image information / signals, audio information / signals, data, and / or information input from a user.

[0325] For example, the device may be a mobile device such as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, etc. In this case, the device may further include at least one of a driving unit including at least one of an engine, a motor, a power train, wheels, brakes, and a steering unit of the device, a power supply unit including a wired / wireless charging circuit, a battery, etc. that supplies power, a sensor unit that senses status information, environmental information, and user information of the device or its surroundings, an autonomous driving unit that performs functions such as path maintenance, speed control, and destination setting, and a position measurement unit that obtains location information of the mobile device through a global positioning system (GPS) and various sensors.

[0326] For example, the device may be an XR device such as an HMD, a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, etc. In this case, the device may further include at least one of a power supply unit that supplies power and includes a wired / wireless charging circuit, a battery, etc., an input / output unit that obtains control information, data, etc. from the outside and outputs the generated XR object, and a sensor unit that senses status information, environmental information, and user information of the device or the surroundings of the device.

[0327] For example, the device may be a robot that can be classified into industrial, medical, household, military, etc. types depending on the purpose or field of use. In this case, the device may further include at least one of a sensor unit that senses status information, environmental information, and user information of the device or its surroundings, and a driving unit that performs various physical actions, such as moving the robot joints.

[0328] For example, the device may be an AI device such as a TV, a projector, a smartphone, a PC, a laptop, a digital broadcasting terminal, a tablet PC, a wearable device, a set-top box (STB), a radio, a washing machine, a refrigerator, digital signage, a robot, a vehicle, etc. In this case, the device may further include at least one of an input unit that acquires various types of data from the outside, an output unit that generates output related to sight, hearing, or touch, a sensor unit that senses status information, environmental information, and user information of the device or its surroundings, and a training unit that trains a model composed of an artificial neural network using learning data.

[0329] The structure of the wireless device illustrated in FIG. 17 may be understood as a part of a terminal (or first node), or as a part of an intermediate point, or as a part of a base station (or second node). If the device illustrated in FIG. 17 is a base station (or second node), the device may further include a wired transceiver for front haul and / or back haul communications. However, if the front haul and / or back haul communications are based on wireless communications, at least one transceiver (206) illustrated in FIG. 17 may be used for front haul and / or back haul communications, and a wired transceiver may not be included.

[0330] The embodiments described above are combinations of components and features of the present invention in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented without being combined with other components or features. Furthermore, it is also possible to form an embodiment of the present invention by combining some components and / or features. The order of operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. Claims that do not have an explicit citation relationship in the patent claims may be combined to form an embodiment or may be incorporated as a new claim through a post-application amendment.

[0331] It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the scope of the invention. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present invention are intended to be included within the scope of the present invention.

[0332] The present disclosure may be used in a terminal, base station, or other equipment of a wireless mobile communication system.

Claims

1. In a method for transmitting a signal by a wireless communication device, Determining the transmission power of each of a plurality of reference signals including a first reference signal and a second reference signal; and Including transmitting at least one of the plurality of reference signals based on the determined transmission power, A method wherein bandwidth (BW) aggregation across multiple carriers is set for the first reference signal, and transmission power is allocated to the bandwidth-aggregated first reference signal with a higher priority than that of the second reference signal based on the first reference signal at least partially overlapping with the second reference signal in the time domain.

2. In paragraph 1, A method in which transmission power is allocated with the high priority to the first reference signal within the maximum transmission power range based on the sum of the power required for the first reference signal and the power required for the second reference signal exceeding the maximum transmission power of the wireless communication device.

3. In paragraph 2, A method, wherein a reduced transmission power is allocated to the second reference signal.

4. In paragraph 1, The above multiple reference signals further include a third reference signal having bandwidth aggregation set, A method wherein transmission power is allocated with higher priority to a reference signal set across more carriers among the first reference signal and the third reference signal, based on the first reference signal at least partially overlapping with the third reference signal in the time domain.

5. In paragraph 1, The above multiple reference signals further include a third reference signal having bandwidth aggregation set, A method wherein transmission power is allocated with higher priority to a reference signal set over a wider frequency band among the first reference signal and the third reference signal, based on the first reference signal at least partially overlapping with the third reference signal in the time domain.

6. In paragraph 1, The above multiple reference signals further include a third reference signal having bandwidth aggregation set, A method in which transmission power is allocated to the first reference signal with a higher priority than the third reference signal based on the fact that a carrier having a highest priority among the plurality of carriers to which the first reference signal is set has a higher priority than a carrier having a highest priority among the plurality of carriers to which the third reference signal is set.

7. In paragraph 1, The above wireless communication device is a terminal, A method wherein the first reference signal is a sounding reference signal (SRS) for positioning.

8. In paragraph 1, The above wireless communication device is a base station, A method wherein the above multiple reference signals are downlink reference signals.

9. A recording medium storing instructions configured to cause the processor to perform operations when executed by the processor, wherein the operations performed by the processor are: Determining the transmission power of each of a plurality of reference signals including a first reference signal and a second reference signal; and Including transmitting at least one of the plurality of reference signals based on the determined transmission power, A recording medium, wherein bandwidth (BW) aggregation across a plurality of carriers is set for the first reference signal, and transmission power is allocated to the bandwidth-aggregated first reference signal with a higher priority than that of the second reference signal based on the first reference signal at least partially overlapping with the second reference signal in the time domain.

10. In wireless communication devices, memory for storing commands; and A processor comprising: a processor configured to operate by executing the above instructions; The operation of the above processor is: Determining the transmission power of each of a plurality of reference signals including a first reference signal and a second reference signal; and Including transmitting at least one of the plurality of reference signals based on the determined transmission power, A wireless communication device, wherein bandwidth (BW) aggregation across a plurality of carriers is set for the first reference signal, and transmission power is allocated to the bandwidth-aggregated first reference signal with a higher priority than that of the second reference signal based on the first reference signal at least partially overlapping with the second reference signal in the time domain.

11. In Article 10, Including a transceiver, The above wireless communication device is a terminal or a base station, a wireless communication device.

12. In paragraph 10, The above wireless communication device is a processing device configured to control a terminal or base station in a wireless communication system.

13. In paragraph 10, A wireless communication device, wherein transmission power is allocated with the high priority to the first reference signal within the maximum transmission power range based on the sum of the power required for the first reference signal and the power required for the second reference signal exceeding the maximum transmission power of the wireless communication device.

14. In paragraph 13, A wireless communication device, wherein a reduced transmission power is allocated to the second reference signal.

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