Uplink transmission and reception method in wireless communication system and apparatus therefor

Abstract

A method according to one embodiment of the present specification comprises the steps of: receiving configuration information related to an SRS; receiving configuration information related to the PUSCH; receiving DCI (Downlink Control Information) for PUSCH (Physical And transmitting the PUSCH based on the DCI. The number of layers associated with the PUSCH is greater than 4. The PUSCH is transmitted based on the antenna port. The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

Description

Technical Field

[0001] The present disclosure relates to an uplink transmission and reception method and an apparatus thereof in a wireless communication system. Background Art

[0002] Mobile communication systems have evolved to provide voice services while ensuring user activity. Mobile communication systems are expanding their services from voice only to data. The current surge in data traffic is exhausting resources, and user demands for higher data rate services bring about the need for more advanced mobile communication systems.

[0003] The next generation of mobile communication systems needs to meet the requirements of, for example, handling the explosive growth of data traffic, significantly improving the transmission rate per user, working with a large number of connected devices, and supporting very low end-to-end latency and high energy efficiency. To this end, various research efforts are being conducted on various technologies such as dual connectivity, massive multiple-input multiple-output (MIMO), in-band full-duplex, non-orthogonal multiple access (NOMA), ultra-wideband support, and device networking.

[0004] According to existing schemes (eg, Rel-17), the maximum number of ports / layers for PUSCH transmission is 4. For non-codebook based PUSCH transmission, up to 4 1-port SRS resources in an SRS resource set may be configured.

[0005] In Rel 18, there is discussion to increase the maximum number of ports / layers for uplink transmission up to 8. In this case, to support up to 8-port based (non-codebook based) PUSCH transmissions using only 1-port SRS resources, the size of the SRI field must be increased by up to two times. Summary of the invention

[0006] Technical issues

[0007] As described above, in order to support PUSCH transmission based on up to 8 ports (ie, up to 8 layers) based on 1-port SRS resources, the size of the SRI field must be increased. Therefore, there arises a problem that the overhead of the DCI payload increases.

[0008] The purpose of the present disclosure is to propose a method to reduce the overhead of DCI payload while supporting PUSCH transmission based on up to 8 ports (up to 8 layers).

[0009] The technical objectives to be achieved by the present disclosure are not limited to those technical objectives described above by way of example only, and other technical objectives not mentioned can be clearly understood by those skilled in the art to which the present disclosure belongs from the following description.

[0010] Technical Solution

[0011] According to an embodiment of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system includes: receiving configuration information related to a sounding reference signal (SRS), receiving configuration information related to a physical uplink shared channel (PUSCH), receiving downlink control information (DCI) for scheduling PUSCH, and sending PUSCH based on the DCI.

[0012] Two SRS resource sets are configured based on the configuration information related to the SRS, and usage of the two SRS resource sets is configured as codebook or non-codebook.

[0013] A transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on configuration information.

[0014] The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator (SRI) field, and / or iii) a second SRS resource indicator (SRI) field.

[0015] The number of layers associated with PUSCH is greater than 4. PUSCH is transmitted based on antenna ports. Antenna ports are based on SRS ports associated with one or more SRS resources indicated based on DCI.

[0016] The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

[0017] Based on the value of the SRS resource set indicator field being 0 or 1: one or more SRS resources may be indicated based on the first SRI field, and the one or more SRS resources may be related to the first SRS resource set or the second SRS resource set.

[0018] The maximum number of bits of the first SRI field may be 8, and the number of bits of the second SRI field may be 0.

[0019] The antenna port may be determined based on i) five or more first SRS ports among eight first SRS ports or ii) five or more second SRS ports among eight second SRS ports.

[0020] PUSCH may be associated with a single transmit and receive point (TRP).

[0021] Based on a value of the SRS resource set indicator field being 2 or 3: the one or more SRS resources may include i) at least one SRS resource indicated based on the first SRI field and ii) at least one SRS resource indicated based on the second SRI field.

[0022] The antenna port may be determined based on i) up to four first SRS ports among eight first SRS ports and ii) up to four second SRS ports among eight second SRS ports.

[0023] The at least one SRS resource indicated based on each SRI field may be related to the first SRS resource set or the second SRS resource set.

[0024] PUSCH can be associated with multiple transmission and reception points (TRPs).

[0025] Based on a value of the SRS resource set indicator field being 0 or 1: the one or more SRS resources may include at least one SRS resource indicated based on each SRI field.

[0026] The PUSCH power control parameter set associated with each code point of the SRI field may be the same.

[0027] The PUSCH power control parameter set may be associated with only one of the codepoint of the first SRI field and the codepoint of the second SRI field.

[0028] The DCI may include a 1-bit field. The 1-bit field may indicate whether the PUSCH is associated with a single TRP or multiple TRPs.

[0029] Based on whether the SRS resource set indicator is included in the DCI, it can be determined whether the PUSCH is related to a single TRP or multiple TRPs.

[0030] The number of repetitions associated with the PUSCH can be determined based on the DCI. Whether the PUSCH is associated with a single TRP or multiple TRPs can be determined based on the number of repetitions.

[0031] According to another embodiment of the present disclosure, a user equipment (UE) operating in a wireless communication system includes: one or more transceivers, one or more processors, and one or more memories, wherein the one or more memories are operably connected to the one or more processors and store instructions, and the instructions configure the one or more processors to perform operations based on execution by the one or more processors.

[0032] The operations include receiving configuration information related to a sounding reference signal (SRS), receiving configuration information related to a physical uplink shared channel (PUSCH), receiving downlink control information (DCI) for scheduling the PUSCH, and transmitting the PUSCH based on the DCI.

[0033] Two SRS resource sets are configured based on the configuration information related to the SRS, and usage of the two SRS resource sets is configured as codebook or non-codebook.

[0034] A transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on configuration information.

[0035] The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field.

[0036] The number of layers associated with PUSCH is greater than 4. PUSCH is transmitted based on antenna ports. Antenna ports are based on SRS ports associated with one or more SRS resources indicated based on DCI.

[0037] The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

[0038] A device according to another embodiment of the present disclosure includes one or more memories and one or more processors functionally connected to the one or more memories.

[0039] The one or more memories include instructions that, upon execution by the one or more processors, configure the one or more processors to perform operations.

[0040] The operations include receiving configuration information related to a sounding reference signal (SRS), receiving configuration information related to a physical uplink shared channel (PUSCH), receiving downlink control information (DCI) for scheduling the PUSCH, and transmitting the PUSCH based on the DCI.

[0041] Two SRS resource sets are configured based on the configuration information related to the SRS, and usage of the two SRS resource sets is configured as codebook or non-codebook.

[0042] A transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on configuration information.

[0043] The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field.

[0044] The number of layers associated with PUSCH is greater than 4. PUSCH is transmitted based on antenna ports. Antenna ports are based on SRS ports associated with one or more SRS resources indicated based on DCI.

[0045] The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

[0046] One or more non-transitory computer-readable media according to another embodiment of the present disclosure stores one or more instructions.

[0047] One or more instructions executable by one or more processors configure the one or more processors to perform operations.

[0048] The operations include receiving configuration information related to a sounding reference signal (SRS), receiving configuration information related to a physical uplink shared channel (PUSCH), receiving downlink control information (DCI) for scheduling the PUSCH, and transmitting the PUSCH based on the DCI.

[0049] Two SRS resource sets are configured based on the configuration information related to the SRS, and usage of the two SRS resource sets is configured as codebook or non-codebook.

[0050] A transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on configuration information.

[0051] The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field.

[0052] The number of layers associated with PUSCH is greater than 4. PUSCH is transmitted based on antenna ports. Antenna ports are based on SRS ports associated with one or more SRS resources indicated based on DCI.

[0053] The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

[0054] According to another embodiment of the present disclosure, a method performed by a base station in a wireless communication system includes: sending configuration information related to a sounding reference signal (SRS), sending configuration information related to a physical uplink shared channel (PUSCH), sending downlink control information (DCI) for scheduling PUSCH, and receiving PUSCH based on the DCI.

[0055] Two SRS resource sets are configured based on the configuration information related to the SRS, and usage of the two SRS resource sets is configured as codebook or non-codebook.

[0056] A transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on configuration information.

[0057] The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field.

[0058] The number of layers associated with PUSCH is greater than 4. PUSCH is received based on antenna ports. Antenna ports are based on SRS ports associated with one or more SRS resources indicated based on DCI.

[0059] The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

[0060] According to another embodiment of the present disclosure, a base station operating in a wireless communication system includes: one or more transceivers, one or more processors, and one or more memories, wherein the one or more memories are operably connected to the one or more processors and store instructions, and the instructions configure the one or more processors to perform operations based on execution by the one or more processors.

[0061] The operations include: sending configuration information related to a sounding reference signal (SRS), sending configuration information related to a physical uplink shared channel (PUSCH), sending downlink control information (DCI) for scheduling the PUSCH, and receiving the PUSCH based on the DCI.

[0062] Two SRS resource sets are configured based on the configuration information related to the SRS, and usage of the two SRS resource sets is configured as codebook or non-codebook.

[0063] A transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on configuration information.

[0064] The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field.

[0065] The number of layers associated with PUSCH is greater than 4. PUSCH is received based on antenna ports. Antenna ports are based on SRS ports associated with one or more SRS resources indicated based on DCI.

[0066] The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

[0067] Beneficial Effects

[0068] According to one embodiment of the present disclosure, a PUSCH based on up to 8 layers is scheduled based on an existing field (ie, two SRI fields).

[0069] Therefore, PUSCH scheduling based on up to 8 layers can be supported based on the existing DCI payload size without increasing the overhead of the additional DCI payload. In other words, it is possible to prevent an additional increase in the DCI payload used to support PUSCH scheduling based on up to 8 layers.

[0070] Furthermore, the complexity in user equipment (UE) / base station implementation required to support up to 8-layer based PUSCH may be minimized.

[0071] Effects that can be achieved with the present disclosure are not limited to the effects described above by way of example only, and other effects and advantages of the present disclosure will be more clearly understood by those skilled in the art to which the present disclosure pertains from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 is a flow chart showing an example of a UL BM procedure using SRS.

[0073] Figure 2 The uplink transmission and reception to which the method proposed in the present disclosure can be applied are illustrated.

[0074] Figure 3 An example of a sending and receiving method for reliability enhancement using transmissions in multiple TRPs is illustrated.

[0075] Figure 4 is a flowchart for describing a method performed by a user equipment according to an embodiment of the present disclosure.

[0076] Figure 5 is a flowchart for describing a method performed by a BS according to another embodiment of the present disclosure.

[0077] Figure 6 is a diagram illustrating the configuration of a first device and a second device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0078] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The following detailed description in conjunction with the accompanying drawings is intended to describe embodiments of the present disclosure, but does not represent the only embodiment of the present disclosure. The following detailed description includes specific details to convey a thorough understanding of the present disclosure. However, it will be readily understood by those of ordinary skill in the art that embodiments of the present disclosure can be practiced even without these details.

[0079] In some cases, to avoid conceptual ambiguity, well-known structures or devices may be omitted, or shown in a block diagram form while focusing on the core features of each structure and device.

[0080] In the following, downlink (DL) means communication from a base station to a terminal, and uplink (UL) means communication from a terminal to a base station. In the downlink, the transmitter may be part of a base station, and the receiver may be part of a terminal. In the uplink, the transmitter may be part of a terminal, and the receiver may be part of a base station. The base station may be represented as a first communication device, and the terminal may be represented as a second communication device. The base station (BS) may be replaced with terms including a fixed station, a node B, an evolved node B (eNB), a next generation node B (gNB), a base station transceiver system (BTS), an access point (AP), a network (5G network), an AI system, a roadside unit (RSU), a vehicle, a robot, an unmanned aerial vehicle (UAV), an augmented reality (AR) device, a virtual reality (VR) device, and the like. In addition, the terminal may be fixed or mobile, and may be replaced by terms including user equipment (UE), mobile station (MS), user terminal (UT), mobile subscriber station (MSS), subscriber station (SS), advanced mobile station (AMS), wireless terminal (WT), machine type communication (MTC) device, machine-to-machine (M2M) device and device-to-device (D2D) device, vehicle, robot, AI module, unmanned aerial vehicle (UAV), augmented reality (AR) device, virtual reality (VR) device, etc.

[0081] SRS related operations

[0082] The UE may be configured (via high-level signaling, RRC signaling, etc.) with one or more sounding reference symbol (SRS) resource sets configured by (high-level parameter) SRS-ResourceSet. For each SRS resource set, the UE may be configured with K (≥1) SRS resources (high-level parameter SRS-resources). Here, K is a natural number, and the maximum value of K is indicated by SRS_capability.

[0083] Figure 1 is a flow chart illustrating an example of a UL BM procedure using SRS.

[0084] - The UE receives RRC signaling (eg, SRS-Config IE) including a usage parameter from the BS (S110). As an example, the usage parameter may be configured as "beam management", "codebook", "non-codebook" or "antenna switching".

[0085] Table 1 shows an example of an SRS-Config information element (IE), and the SRS-Config IE is used for SRS transmission configuration. The SRS-Config IE includes a list of SRS resources and a list of SRS resource sets. Each SRS resource set means a collection of SRS resources.

[0086] The network can use the configured aperiodicSRS-ResourceTrigger (L1 DCI) to trigger the transmission of the SRS resource set.

[0087] [Table 1]

[0088]

[0089]

[0090]

[0091]

[0092]

[0093]

[0094] In Table 1, the purpose represents a high-level parameter indicating whether the SRS resource set is used for beam management or whether the SRS resource set is used for codebook-based transmission or for non-codebook-based transmission. "spatialRelationInfo" is a parameter indicating the configuration of the spatial relationship between the reference RS and the target SRS. Here, the reference RS can be an SSB, CSI-RS, or SRS corresponding to the L1 parameter "SRSspatialRelationInfo". The purpose is configured for each SRS resource set.

[0095] -The UE determines a transmit (Tx) beam for the SRS resource to be transmitted based on the SRS-SpatialRelationInfo included in the SRS-Config IE (S120). Here, the SRS-SpatialRelationInfo is configured for each SRS resource and indicates that the same beam as that used in the SSB, CSI-RS, or SRS is to be applied to each SRS resource. In addition, the SRS-SpatialRelationInfo may be configured or not configured in each SRS resource.

[0096] -If SRS-SpatialRelationInfo is configured in the SRS resource, SRS-SpatialRelationInfo is transmitted by applying the same beam as the beam used in SSB, CSI-RS or SRS. However, if SRS-SpatialRelationInfo is not configured in the SRS resource, the UE arbitrarily determines a transmission beam and transmits SRS via the determined transmission beam (S130).

[0097] - In addition, the UE may or may not receive feedback regarding the SRS from the base station (S140).

[0098] Figure 2 is a flowchart showing an example of uplink transmission / reception operation to which the method proposed in the present disclosure can be applied.

[0099] Reference Figure 2 , the eNB schedules uplink transmission, such as frequency / time resources, transmission layer, uplink precoder, MCS, etc. (S210). Specifically, the eNB can determine the beam for PUSCH transmission of the UE through the aforementioned operations.

[0100] The UE receives DCI for downlink scheduling (ie, including scheduling information of the PUSCH) on the PDCCH (S220).

[0101] DCI format 0_0 or 1_1 may be used for uplink scheduling, and specifically, DCI format 0_1 ​​includes the following information.

[0102] Identifier for DCI format, UL / supplementary uplink (SUL) indicator, bandwidth part indicator, frequency domain resource assignment, time domain resource assignment, frequency hopping flag, modulation and coding scheme (MCS), SRS resource indicator (SRI), precoding information and number of layers, antenna port, SRS request, DMRS sequence initialization and uplink shared channel (UL-SCH) indicator.

[0103] Specifically, the configured SRS resource in the SRS resource set associated with the high-level parameter "usage" may be indicated by the SRS resource indicator field. In addition, "spatialRelationInfo" may be configured for each SRS resource, and the value of "spatialRelationInfo" may be one of {CRI, SSB, and SRI}.

[0104] The UE transmits uplink data to the eNB on the PUSCH (S230).

[0105] When the UE detects a PDCCH including DCI format 0_0 or 1_1, the UE sends a corresponding PUSCH according to an instruction of the corresponding DCI.

[0106] For PUSCH transmission, two transmission schemes are supported, namely, codebook-based transmission and non-codebook-based transmission:

[0107] i) When the higher layer parameter "txConfig" is set to "codebook", the UE is configured for codebook based transmission. In contrast, when the higher layer parameter "txConfig" is set to "nonCodebook", the UE is configured for non-codebook based transmission. When the higher layer parameter "txConfig" is not configured, the UE does not predict that the PUSCH is scheduled by DCI format 0_1. When the PUSCH is scheduled by DCI format 0_0, the PUSCH transmission is based on a single antenna port.

[0108] In the case of codebook-based transmission, the PUSCH can be scheduled by DCI format 0_0, DCI format 0_1, DCI format 0_2, or semi-statically. When the PUSCH is scheduled by DCI format 0_1, the UE determines the PUSCH transmission precoder based on the SRI, the transmit precoding matrix indicator (TPMI) and the transmission rank from the DCI (as given by the SRS resource indicator and the precoding information and layer number field). The TPMI is used to indicate the precoding to be applied on the antenna port, and when multiple SRS resources are configured, the TPMI corresponds to the SRS resource selected by the SRI. Alternatively, when a single SRS resource is configured, the TPMI is used to indicate the precoder to be applied on the antenna port and corresponds to the corresponding single SRS resource. The transmission precoder is selected from the uplink codebook with the same antenna port number as the high-level parameter '"nrofSRS-Ports". When the UE is configured to set the high-level parameter "txConfig" to "codebook", at least one SRS resource is configured in the UE. The SRI indicated in slot n is associated with the most recent transmission of the SRS resource identified by the SRI, and here, the SRS resource precedes the PDCCH carrying the SRI (ie, slot n).

[0109] ii) In the case of non-codebook based transmission, the PUSCH may be scheduled by DCI format 0_0, DCI format 0_1, or semi-statically. When multiple SRS resources are configured, the UE may determine the PUSCH precoder and transmission rank based on a wideband SRI, and here, the SRI is given by the SRS resource indicator in the DCI, or by the high-level parameter "srs-ResourceIndicator". The UE may use one or more SRS resources for SRS transmission, and here, multiple SRS resources may be configured for simultaneous transmission in the same RB based on UE capabilities. Only one SRS port is configured for each SRS resource. Only one SRS resource may be configured to set the high-level parameter "usage" to "nonCodebook". The maximum number of SRS resources that may be configured for non-codebook based uplink transmission is 4. The SRI indicated in slot n is associated with the most recent transmission of the SRS resource identified by the SRI, and here, the SRS transmission precedes the PDCCH carrying the SRI (i.e., slot n).

[0110] Multiple transmit / receive point (TRP) related operations

[0111] The M-TRP transmission scheme in which M TRPs send data to one user equipment (UE) can be mainly divided into two categories: eMBB M-TRP transmission as a scheme for improving the transmission rate, and URLLC M-TRP transmission as a scheme for improving the reception success rate and reducing the delay.

[0112] <Description related to MTRP URLLC>

[0113] UL MTRP-URLLC means that multiple TRPs receive the same data / UCI from one UE using different layer / time / frequency resources. For example, TRP 1 receives the same data / UCI from the UE in resource 1, and TRP 2 receives the same data / UCI from the UE in resource 2, and then shares the received data / UCI through the backhaul link connecting the TRPs. The UE configured with the UL MTRP-URLLC transmission scheme sends the same data / DCI using different layer / time / frequency resources. At this time, the BS instructs the UE which transmission beam and which transmission power to use in the layer / time / frequency resources for sending the same data / DCI (i.e., UL TCI state). For example, when sending the same data / UCI in resources 1 and 2, the UL TCI state used by resource 1 and the UL TCI state used by resource 2 are indicated. UL MTRP URLLC can be applied to PUSCH / PUCCH.

[0114] <Description related to MTRP transmission based on SDCI or MDCI>

[0115] In addition, in terms of downlink control information (DCI) transmission, the multi (M)-TRP transmission scheme can be divided into i) the multi (M)-DCI-based M-TRP transmission scheme where each TRP sends different DCIs and ii) the single (S)-DCI-based M-TRP transmission scheme where one TRP sends the DCI. As an example, in the case of S-DCI, since all scheduling information for data transmitted through M TRPs should be delivered through one DCI, S-DCI can be used in an ideal backhaul (BH) environment where two TRPs can dynamically coordinate with each other.

[0116] The UE can identify the PUSCH (or PUCCH) scheduled by the DCI received by different CORESETs (or CORESETs belonging to different CORESET groups) as the PUSCH (or PUCCH) sent to different TRPs or the PUSCH (or PUCCH) of different TRPs. In addition, the scheme for UL transmission (e.g., PUSCH / PUCCH) to different TRPs can be equivalently applied to UL transmission (e.g., PUSCH / PUCCH) to different panels belonging to the same TRP.

[0117] <Description related to R17 NR MTRP transmission>

[0118] The R17 NR standard supports MTRP PDCCH repeated transmission, MTRP PDCCH / PDSCH SFN transmission, S-DCI-based MTRP PUSCH repeated transmission, and single PUCCH resource-based MTRP PUCCH repeated transmission. All these transmission techniques repeatedly send the same content (i.e., DCI or UL TB or UCI) with enhanced URLLC objectives to improve reliability. In the case of MTRP PDCCH repeated transmission, the MTRP PDCCH is TDM or FDM and is repeatedly sent, the MTRP PDCCH / PDSCH SFN is repeatedly sent in the same time / frequency / layer, in S-DCI-based MTRP PUSCH repeated transmission, the S-DCI-based MTRP PUSCH is TDM and is repeatedly sent, and in single PUCCH resource-based MTRP PUCCH repeated transmission, the single PUCCH resource-based MTRP PUCCH is TDM and is repeatedly sent.

[0119] - S-DCI-based MTRP PUSCH repeated transmission in Rel-17

[0120] In the R17 NR standard, the base station configures two SRS sets for the UE for S-DCI-based MTRP PUSCH transmission, and each set is used to indicate the UL Tx ports and UL beam / QCL information towards TRP 1 and TRP 2 respectively. Additionally, the base station can perform SRS resource indication for each SRS set through two SRI fields in one DCI and indicate up to two PC parameter sets. For example, the first SRI field can indicate the SRS resources and PC parameter set defined in set 0, and the second SRI field can indicate the SRS resources and PC parameter set defined in set 1. The UE is indicated by the first SRI field with the UL Tx port, PC parameter set, and UL beam / QCL information towards TRP 1 and performs PUSCH transmission at the TO corresponding to set 0. Similarly, the UE is indicated by the second SRI field with the UL Tx port, PC parameter set, and UL beam / QCL information towards TRP 2 and performs PUSCH transmission at the TO corresponding to set 1.

[0121] <Meaning of TCI state / beam indication>

[0122] In addition, hereinafter, in the method proposed in the present disclosure, using (mapping) a specific TCI state (or TCI) when receiving data / DCI / UCI for a certain frequency / time / space resource may mean, in the case of DL, estimating a channel from DMRS using the QCL type and QCL RS indicated by the corresponding DL TCI state in the frequency / time / space resource, and receiving / demodulating data / DCI using the estimated channel. Using (mapping) a specific TCI state (or TCI) when receiving data / DCI / UCI for a certain frequency / time / space resource may mean, in the case of UL, transmitting / modulating DMRS and data / UCI by using the Tx beam and / or Tx power indicated by the corresponding UL TCI state.

[0123] The UL TCI state may contain the Tx beam or Tx power information of the UE, and the spatial relationship information may also be configured to the UE through other parameters instead of the TCI state. The UL TCI state may be directly indicated to the UL authorization DCI, or may mean the spatial relationship information of the SRS resource indicated by the SRI field of the UL authorization DCI. Alternatively, the UL TCI state may mean the OL transmit power control parameter connected to the value indicated by the SRI field of the UL authorization DCI (j: index for the open-loop parameters Po&alpha (up to 32 parameter value sets per cell), q_d: index of the DL RS resource for PL measurement (up to 4 measurements per cell), and l: closed-loop power control process index (up to 2 processes per cell)). Alternatively, in R17 NR, DL authorization DCI may be used to indicate the UL TCI.

[0124] The base station described in the present disclosure may be a general term for an object that performs data transmission and reception with a UE. For example, the BS described in the present disclosure may be a concept including one or more transmission points (TPs), one or more transmission and reception points (TRPs), and the like. For example, the multiple TPs and / or multiple TRPs described herein may be included in a single base station, or may be included in multiple base stations. In addition, the TP and / or TRP may include a panel, a transmission and reception unit, and the like of the BS.

[0125] In addition, a TRP as described herein may mean an antenna array having one or more antenna elements that can be used for a network located at a specific geographic location in a specific area. In the present disclosure, for ease of description, "TRP" is used as a reference, however, TRP may be replaced with, and understood / applied as, a base station, a transmission point (TP), a cell (e.g., a macro cell / small cell / pico cell), an antenna array or panel, etc.

[0126] Method for improving reliability in multiple TRPs

[0127] Figure 3 An example of a transmission / reception method for improving reliability using transmissions in multiple TRPs is illustrated.

[0128] Figure 3 The example in (a) shows that layer groups sending the same codeword (CW) / transport block (TB) correspond to different TRPs. That is, the same CW can be sent through different layers / layer groups. In this case, the layer group may refer to a certain layer set consisting of one or more layers.

[0129] Figure 3 The example in (b) shows an example of sending different CWs through layer groups corresponding to different TRPs. That is, different CWs can be sent through different layers / layer groups. In this case, it can be assumed that the TBs corresponding to the first CW (CW#1) and the second CW (CW#2) are the same. Therefore, this can be regarded as an example of repeated transmission of the same TB.

[0130] exist Figure 3 (a) or Figure 3 In (b), the same TB is repeatedly sent through different layer groups, and each layer group is sent by a different TRP / panel, thereby improving the data reception probability, which can be called URLLC M-TRP transmission based on spatial division multiplexing (SDM). Layers belonging to different layer groups are sent through DMRS ports belonging to different DMRS CDM groups respectively.

[0131] In addition, although the above description about multiple TRPs has been given with respect to a spatial division multiplexing (SDM) scheme using different layers, it can also be widely applied to a frequency division multiplexing (FDM) scheme based on different frequency domain resources (e.g., RB / PRB (sets)) and / or a time division multiplexing (TDM) scheme based on different time domain resources (e.g., time slots, symbols, and sub-symbols).

[0132] The above content can be applied in combination with the method proposed in the present disclosure to be described below, or can be supplemented to illustrate the technical features of the method proposed in the present disclosure. The methods to be described below are distinguished only for the convenience of description, and it goes without saying that some components of any method can be replaced by some components of another method, or can be applied in combination with each other.

[0133] According to the 3GPP standards up to NR Rel-17, the maximum number of uplink transmission antennas of the UE is 4, and up to 4 layers are supported for data transmission (PUSCH). In the Rel-18 RAN1 MIMO discussion, standardization will be performed to support data transmission of more than 4 layers by utilizing 8 transmissions, which takes into account not only handheld terminals but also terminals such as customer premises equipment (CPE) / fixed wireless access (FWA) / vehicles / industrial devices.

[0134] Therefore, enhancements will be made to send up to 8 layers in both codebook-based transmission and non-codebook-based transmission, which is the PUSCH transmission scheme for NR.

[0135] For codebook-based transmission, an uplink codebook supporting 8 ports may be newly introduced during the standardization process. In non-codebook-based transmission, in addition to up to 4 (non-codebook-based) SRS resources, up to 8 SRS resources may need to be indicated by the SRS resource indicator (SRI) for the existing up to 4 layers of PUSCH scheduling. However, the SRI field size of the existing UL grant DCI may not be sufficient to indicate a combination of up to 8 SRS resources for a single PUSCH, and an excessively large SRI field size may be required to support all combinations.

[0136] Currently, the SRI field code point configuration of the UL grant DCI for non-codebook based transmission can be determined by RRC parameter setting (Lmax, Nsrs) as follows.

[0137] Here, Lmax is given by a field / parameter (e.g., maxMIMO-Layers) in the configuration (e.g., PUSCH-ServingCellConfig) indicating the maximum number of MIMO layers for PUSCH in all BWPs for this uplink of the serving cell to specify common UE-specific PUSCH parameters for BWPs across UEs in the serving cell. When this parameter is not set, Lmax is given by the maximum number of PUSCH layers supported by the UE for the serving cell for non-codebook based operation.

[0138] In addition, if the SRS resource set indicator is present, Nsrs is the number of SRS resource sets within the SRS resource set indicated by the SRS resource set indicator. Otherwise, a high-level parameter indicating the usage of the SRS (e.g., usage) has a value of "nonCodeBook" and is associated with the high-level parameter, and is the number of SRS resource sets within the SRS resource configured by high-level signaling.

[0139] Table 2 below illustrates SRI indication for non-codebook based PUSCH transmission when Lmax=1.

[0140] [Table 2]

[0141]

[0142] Table 3 below illustrates SRI indication for non-codebook based PUSCH transmission in the case of Lmax=2.

[0143] [Table 3]

[0144]

[0145] Table 4 below illustrates SRI indication for non-codebook based PUSCH transmission in the case of Lmax=3.

[0146] [Table 4]

[0147]

[0148]

[0149] Table 5 below illustrates SRI indication for non-codebook based PUSCH transmission in the case of Lmax=4.

[0150] [Table 5]

[0151]

[0152] As shown in Table 5 above, 15 entries are required to support all combinations of 4 SRS resource indicators (SRIs) to support up to 4 layers, so up to 4 bits of SRI fields are defined for non-codebook based transmission. If 8 SRIs are supported to support up to 8 layers, the existing SRI field size may not be sufficient to support all combinations of 8 SRIs and may require too many bits.

[0153] Based on this problem, the present disclosure proposes a method for supporting up to 8 layers of transmission by utilizing 8 transmit antennas in uplink transmission of a UE, and a method for configuring / indicating up to 8 layers of scheduling for a UE of a base station and performing subsequent UE uplink transmission.

[0154] In the present disclosure, “ / ” may be interpreted as “and”, “or” or “and / or” according to the context.

[0155] Hereinafter, in the present disclosure, "transmission of an SRS resource set" may be used as the same meaning as "transmission of an SRS based on an information set in an SRS resource set". In addition, "sending an SRS resource" or "sending a plurality of SRS resources" may be used interchangeably with "sending an SRS or a plurality of SRSs based on information configured in an SRS resource".

[0156] In Rel-17 MIMO, for M-TRP PUSCH transmission based on a single DCI (S-DCI), enhancements are made to apply different beams (i.e., spatialRelationInfo) and different power control (PC) parameter sets to each PUSCH transmission opportunity (TO: Transmission Opportunity) (or TO group) for each TRP. Here, improvements have been made to be able to configure up to two CB (codebook) / NCB (non-codebook) based SRS resource sets to apply different beams / PCs (guiding Rel-16, a maximum of one SRS resource set can be configured). In addition, enhancements are performed to extend the SRI field in the UL grant DCI to 2 so that the base station can indicate the SRI corresponding to each target TRP (i.e., indicating the beam and PC) during UL transmission based on CB / NCB.

[0157] A new SRS resource set indication field is also introduced in the UL grant DCI to indicate a method for utilizing two SRI fields, as shown in Table 6 below.

[0158] [Table 6]

[0159]

[0160]

[0161] When DCI format 0_1 ​​or DCI format 0_2 indicates a code point of '10' for the SRS resource set indication field (in the case of bit field 2 in Table 6), the association of the first SRS resource set and the second SRS resource set with K consecutive time slots is determined as follows:

[0162] - When K=2, the first SRS resource set and the second SRS resource set are applied to the first time slot and the second time slot of two consecutive time slots, respectively.

[0163] -When K>2 and cyclicMapping in PUSCH-Config is enabled, the first SRS resource set and the second SRS resource set are applied to the first time slot and the second time slot of the K consecutive time slots, respectively, and the same SRS resource set mapping pattern continues in the remaining time slots of the K consecutive time slots.

[0164] -When K>2 and sequentialMapping in PUSCH-Config is enabled, the first SRS resource set is applied to the first time slot and the second time slot of K consecutive time slots, the second SRS resource set is applied to the third time slot and the fourth time slot of K consecutive time slots, and the same SRS resource set mapping pattern continues in the remaining time slots of K consecutive time slots.

[0165] In addition, when DCI format 0_1 ​​or DCI format 0_2 indicates code point '11' for the SRS resource set indication field (in the case of bit field 3 in Table 6), the association of the first SRS resource set and the second SRS resource set with K consecutive time slots is determined as follows:

[0166] - When K=2, the second SRS resource set and the first SRS resource set are applied to the first time slot and the second time slot of two consecutive time slots, respectively.

[0167] -When K>2 and cyclicMapping in PUSCH-Config is enabled, the second SRS resource set and the first SRS resource set are applied to the first slot and the second slot of the K consecutive slots, respectively, and the same SRS resource set mapping pattern continues in the remaining slots of the K consecutive slots.

[0168] -When K>2 and sequentialMapping in PUSCH-Config is enabled, the second SRS resource set is applied to the first time slot and the second time slot of K consecutive time slots, the first SRS resource set is applied to the third time slot and the fourth time slot of K consecutive time slots, and the same SRS resource set mapping mode continues in the remaining time slots of K consecutive time slots.

[0169] Hereinafter, the present disclosure proposes a method for supporting 8Tx UL transmission mainly in non-codebook (NCB) based transmission when there is one SRI field in the UL grant DCI, but the present disclosure may also be applicable to codebook (CB) based transmission and / or when there are two SRI fields in the DCI.

[0170] Proposal 1

[0171] Hereinafter, a method for configuring / indicating PUSCH transmission of rank 4 or higher and layer 4 or higher by allowing configuration of multiple SRS ports for SRS resources configured in an SRS resource set for non-codebook (NCB) usage will be described.

[0172] Proposal 1-1

[0173] It may be specified / defined that two or more ports can be configured for SRS resources configured in an SRS resource set for non-codebook (NCB) purposes. In addition, in order to support PUSCH scheduling of rank 5 or higher, it may be specified / defined that two (or / and two or more) SRS resources are configured / indicated (continuously).

[0174] For example, a combination of the number of ports for two (or / and two or more) SRS resources may be defined / specified / configured as follows:

[0175] - Rank 5: 3-port resources + 2-port resources and / or 4-port resources + 1-port resource

[0176] - Rank 6: 4-port resource + 2-port resource and / or 3-port resource + 3-port resource

[0177] -Rank 7: 4 port resources + 3 port resources

[0178] - Rank 8: Only two 4-port resources are used to support

[0179] By defining / prescribing / configuring SRS resource combinations for supporting PUSCH transmission of rank 5 or higher as described above, only limited SRI combinations can be mapped / connected to the SRI field for PUSCH indication of rank 5 or higher. Therefore, the base station can perform PUSCH scheduling of rank 5 or higher through the SRI field without reusing the existing SRI field size in the same manner or without significantly increasing the size from the existing size.

[0180] Proposal 1-2

[0181] A maximum of 2 ports can be configured for SRS resources configured in an SRS resource set for non-codebook (NCB) purposes. By enabling a maximum of 2 ports to be configured for existing SRS resources for NCB purposes (where configuration of a maximum of 1 port is the maximum configuration), up to 4 2-port SRS resources can be configured in an SRS resource set for NCB purposes. Therefore, it is possible to support a maximum of 8 ports (and / or a maximum of 8 layers) of PUSCH by utilizing only the size of the existing SRI field.

[0182] In this case, according to conventional operation, the UE calculates the precoder for each 1-port SRS resource based on the associated CSI-RS configured in the SRS resource set by utilizing up to 4 1-port SRS resources. The UE sends the SRS resource for NCB purposes based on the corresponding precoder. However, in this embodiment, the UE may calculate the 1-port precoder for the 1-port SRS resource, and the UE calculates the 2-port precoder for the 2-port SRS resource according to the configuration.

[0183] Here, when there are 2-port SRS resources in the SRS resource set for NCB purposes, the base station may intend to indicate the SRI corresponding to the 2-port SRS resources through DCI when scheduling PUSCH, and only use 1 port of the 2 ports of the SRS resources for PUSCH scheduling. In order to solve such a problem, the options described below can be used for PUSCH scheduling of the base station.

[0184] Option 1)

[0185] In addition to the SRI field of the UL grant DCI, when indicating SRI, the base station may also use an additional 1 or 2 bits to indicate whether to utilize all 2 ports of the 2-port SRS resource within the SRS resource set for NCB purposes or only 1 port. Here, if an additional 1 bit is utilized, a 1-bit value may be set / defined, for example, a 1-bit value may be set to "0" = "both 2 ports are used for PUSCH transmission", "1" = "only 1 predefined / preconfigured port among the 2 ports is used for PUSCH transmission". In this case, the above-mentioned predefined / preconfigured 1 port may correspond to the lowest / highest port (i.e., port index). If an additional 2 bits are utilized, a 2-bit value may be set / defined, for example, a 2-bit value may be set to "0" = "neither of the 2 ports is used for PUSCH transmission", "01" = "the lowest / first port among the 2 ports is used for PUSCH transmission", "10" = "the highest / second port among the 2 ports is used for PUSCH transmission" and "11" = "both 2 ports are used for PUSCH transmission".

[0186] Option 2)

[0187] When SRI is indicated by an additional bit in addition to the SRI field of the UL grant DCI, the base station may discard any one port for a specific 2-port SRS resource within the SRS resource set for NCB purposes. For example, an additional 1 bit may be set / defined as "0" = "use two ports for PUSCH transmission for a specific resource among the 2-port SRS resources (indicated by SRI)" and "1" = "discard the lowest / highest port ( / layer) and use only 1 port for PUSCH transmission for a specific resource among the 2-port SRS resources (indicated by SRI)".

[0188] Option 3)

[0189] When SRI is indicated by an additional 1 bit in addition to the SRI field of the UL grant DCI, the base station may discard any one port for a specific 2-port SRS resource within the SRS resource set for NCB purposes. Therefore, when the SRS resources for NCB purposes are configured with only 2-port SRS resources, SRI may be indicated as supporting odd layers. For example, the additional 1 bit may be set / defined as "0" = "Use all two 2 ports for a specific resource among the 2-port SRS resources (indicated by SRI) for PUSCH transmission" and "1" = "Discard the lowest / highest port ( / layer) for a specific resource among the 2-port SRS resources (indicated by SRI), and then use only 1 port for PUSCH transmission".

[0190] Proposal 1-3

[0191] (Up to) 4 ports may be configured for specific SRS resources configured within an SRS resource set for non-codebook (NCB) purposes. The base station may perform a maximum 8-port SRI indication by configuring up to 4 additional 1-port SRS resources in an SRS resource set for NCB purposes. The 4-port SRS resources may be i) used for up to 4 layers of PUSCH transmission, or ii) for more than 4 layers of PUSCH transmission. A field may be separately present / defined in the UL grant DCI to indicate which port(s) of the 4 ports for the 4-port SRS resources are scheduled for PUSCH transmission (for the remaining 4 1-port SRS resources, the existing SRI field may be utilized to perform SRI indication).

[0192] In the case of method i above (i.e., up to 4 layers of PUSCH), if the base station does not want to indicate more than 4 layers of PUSCH, the remaining 4 1-port SRS resources may not be configured. This allows saving the DCI payload of the existing SRI field. At this time, only a separate field may be used to perform PUSCH scheduling.

[0193] In the case of method ii above (ie, more than 4 layers of PUSCH), if the base station does not want to indicate more than 4 layers of PUSCH, the 4-port SRS resource may not be configured. The base station may only use the existing SRI field to perform PUSCH scheduling, thus saving DCI payload.

[0194] Proposal 2

[0195] All SRS resources configured in an SRS resource set for non-codebook (NCB) usage may be configured as 1-port SRS resources. In addition, the following options may be utilized in PUSCH scheduling to indicate a combination of up to 8 SRS resources with a single SRI field.

[0196] Option 1)

[0197] The total number of combinations that can be composed of up to 8 SRS resources in the SRS resource set for NCB purposes is 8C1(8)+8C2(28)+8C3(56)+8C4(70)+8C5(56)+8C6(28)+8C7(8)+8C8(1)=255 (expressed in 8 bits). Here, 8C1 means multiple cases of selecting one SRS resource among eight SRS resources. In terms of base station / terminal implementation, implementing all combinations of SRIs corresponding to 255 entries may have significant overhead / complexity. To prevent this, the following operations / configurations may be considered:

[0198] By configuring a maximum of 8 bits of the SRI field in the UL grant DCI, all / some of the 8 SRS resources starting from the lowest resource (i.e., the SRS resource with the lowest index) can be indicated in the form of a complete bitmap. When resources of SRS resource #0 to resource #7 are configured in the SRS resource set for NCB purposes, if resource #0 and resource #2 are to be indicated, when scheduling PUSCH, the base station can schedule 2-rank PUSCH transmission by indicating resource #0 and resource #2 (such as "10100000") in the maximum 8-bit SRI field of the UL grant DCI.

[0199] Option 2)

[0200] A method may be considered in which the number of combinations for SRS resources is limited by rank by prescribing / defining / configuring only some combinations among all combinations that can consist of a maximum of 8 SRS resources within an SRS resource set for NCB purpose.

[0201] According to one embodiment, the restriction of the combination can be performed as follows. By defining / configuring that only some 8Cx from 8C1 to 8C8 are supported, the table used to represent / indicate the SRI field size and SRI field entries can be simplified. For example, it can be defined / configured that 8C3 and 8C5, 8C7, etc. are not supported. In this case, a maximum of 7 bits of the SRI field can also be utilized to support 135 entries.

[0202] According to one embodiment, the restriction of combinations can be performed as follows. By defining / configuring that only some combinations in a specific 8Cx are supported, the table for representing / indicating the SRI field size and the SRI field entries can be simplified. Some of the above supported combinations can be configured in a scheme that gives priority to specific (lowest) SRS ports where the performance of the power amplifier (PA) is excellent in terms of radio frequency (RF) implementation. As an example, some supported combinations may be combinations that include the following SRS resources: where the RF-related performance is excellent / a good SRS port or a lowest SRS port is configured. As a result, the SRI field size can be saved. For example, a 2-rank SRI can be configured so that for an 8C2 combination, SRS resources with a local index of 0 (i.e., [0, 1], [0, 2], [0, 3], [0, 4], [0, 5], [0, 6], and [0, 7]) are unconditionally included.

[0203] Option 3)

[0204] The base station can be configured by RRC signaling for up to 8 SRS resources in the SRS resource set configured for NCB purpose. In addition, the base station can perform a sub-selection operation through a MAC control element (CE), which activates some of the eight SRS resources to indicate the SRI field in accordance with the UL channel environment. In the MAC CE message, a field for selecting some SRS resources among the 8 SRS resources, for example, in a single octet, can exist / be defined. The size of the SRI field can be adaptively changed through the MAC CE.

[0205] Option 4)

[0206] The base station may configure a maximum of 8 SRS resources in the SRS resource set configured for NCB purpose through RRC signaling. In addition, the base station may schedule PUSCH using a maximum of 8 bits of the SRI field.

[0207] Here, when two SRI fields are utilized (such as M-TRP PUSCH transmission based on Rel-17 S-DCI), the following operations may be performed.

[0208] When the value "00" (ie, "0" in Table 6) or "01" (ie, "1" in Table 6) is indicated by the SRS resource set indicator field and S-TRP PUSCH transmission scheduling is performed, the base station can use the entire maximum 8-bit SRI field to send PUSCH. In other words, the base station can use an 8-bit SRI field.

[0209] On the other hand, when the value "11" (ie, "2" in Table 6) or "11" (ie, "3" in Table 6) is indicated by the SRS resource set indicator field and M-TRP PUSCH transmission scheduling is performed, a maximum of 8 bits can be divided into two SRI fields of 4 bits + 4 bits. The base station can perform indication of two SRIs for M-TRP PUSCH transmission based on two 4-bit SRI fields.

[0210] In the scheme of dividing 8 bits into two SRI fields of 4 bits each and utilizing them, the following implementations may be considered. The SRI field saving method of the above implementation may be utilized, or scheduling may be limited to a maximum of 4 layers of PUSCH per TRP. As a result, a method for scheduling a maximum of 4 layers of PUSCH with a maximum 4-bit SRI field per target TRP may be utilized. And / or, if a maximum of 8 bits are divided into two SRI fields (such as 4 bits + 4 bits), the layers of each PUSCH per target TRP may be limited to a maximum of 4 layers. In this case, 4 bits in each SRI field may be utilized to support 4-layer transmission.

[0211] Proposal 3

[0212] The two SRI fields used in the M-TRP PUSCH transmission based on Rel-17 S-DCI can be used for up to 8TxPUSCH scheduling. The base station can indicate up to 4 SRIs in each SRI field through a combination of up to 4 bits + up to 4 bits, so up to 8 layers (S-TRP) PUSCH can be scheduled.

[0213] Here, since the scheduling corresponds to S-TRP PUSCH scheduling, the following implementation methods can be considered.

[0214] According to one embodiment, the SRI mapped / linked to two SRI fields may be configured in a single SRS resource set, rather than separately configured in two SRS resource sets (for NCB purposes). In addition, the configuration of the same power control parameter set may be applied to SRS transmission.

[0215] According to one embodiment, the SRI mapped / connected to two SRI fields may be divided and configured into two SRS resource sets (for NCB purposes). In other words, the SRI may be indicated from two SRS resource sets. At this time, one of the following operations / configurations i) to iii) may be applied.

[0216] i) The UE may desire that the PC parameter set be configured only for one specific set of two SRS resource sets (eg, the first (and / or lowest indexed) SRS resource set).

[0217] ii) The UE may not desire to configure different PC parameter sets in the two SRS resource sets.

[0218] iii) Even if different PC parameter sets are configured for the two SRS resource sets, the UE may only follow one PC parameter set out of the two sets (eg, the PC parameter set associated with the first (and / or lowest indexed) SRS resource set).

[0219] If a maximum of 8 SRS resources are configured within a single SRS resource set, the maximum of 8 SRS resources within the single SRS resource set may be defined / configured to be mapped to the SRI field as follows: Starting from the SRS resource with the lowest index, n resources (where n is a natural number) may be mapped to the first SRI field, and the remaining resources may be mapped to the second SRI field.

[0220] In addition, for the two SRI fields used for the existing M-TRP PUSCH operation, two different PC parameter sets (e.g., two sri-PUSCH-MappingToAddModList) are mapped to each SRI field. However, in an embodiment, since a single power control for the S-TRP PUSCH must be performed, only a single PC parameter set (e.g., a single sri-PUSCH-MappingToAddModList) may be configured for only one specific SRI field (e.g., the first or lowest SRI field). And / or the UE may expect such operation (i.e., the UE may not expect the configuration of two sri-PUSCH-MappingToAddModLists).

[0221] And / or, even if two different PC parameter sets (e.g., two sri-PUSCH-MappingToAddModLists) are mapped / configured / connected to each SRI field, the UE may only follow the first (or lowest) parameter set (e.g., the first / lowest sri-PUSCH-MappingToAddModList) among the different PC parameter sets (e.g., the PUSCH power control indication may be performed only through the code point of the first / lowest SRI field).

[0222] Even if two SRI fields are configured as above, for the following configurations i) to iii), the UE may consider / judge that the base station intends to use two SRI fields for 8Tx UL transmission for S-TRP purposes, and may perform the above operations.

[0223] i) Only one SRS resource set is configured for CB / NCB usage.

[0224] ii) Even if two SRS resource sets are configured, PC parameters are only set for one SRS resource set.

[0225] iii) A PC parameter set for PUSCH usage connected to an SRI field is configured only in one SRI field.

[0226] If two SRI fields are used for 8Tx UL transmission as described above, all or some of the fields present / defined for M-TRP PUSCH transmission scheduling (e.g., an SRS resource set indication field and a second phase tracking reference signal (PT-RS) indication field, and a first TPC field or a second TPC field) may not be configured for UL grant DCI. Alternatively, even if a field is configured, the field may be regarded as an unused field, or an unused field may be utilized to indicate a combination of up to 8 SRIs.

[0227] The following methods i) and ii) may be considered to support 8TxUL transmission by utilizing two SRI fields of the existing Rel-17.

[0228] i) Method of using a specific SRS resource set among two (CB or NCB) SRS resource sets configured for two SRI fields

[0229] ii) Method using two (CB or NCB) SRS resource sets configured for two SRI fields

[0230] As shown in Table 6 above, the two SRI fields may have a connection / correspondence relationship with the two preset SRS resource sets. When the SRS resource set indication field is "0" or "1", the first SRS resource set or the second SRS resource set (of the two SRS resource sets) may be used to perform S-TRP (PUSCH repetition) transmission.

[0231] In addition, when the SRS resource set indication field is "2" or "3", M-TRP PUSCH repetition is performed, and depending on whether it is "2" or "3", the mapping order between the two SRS resource sets and the transmission opportunity (TO) groups can be changed (for example, when the SRS resource set indication field is "2", the first SRS resource set can correspond to the first TO group, and the second SRS resource set can correspond to the second TO group, or when the SRS resource set indication field is "3", the second SRS resource set can correspond to the first TO group, and the first SRS resource set can correspond to the second TO group).

[0232] According to the above method i), in the existing Rel-17, the maximum number of SRS ports that can be set in a specific SRS resource set among the two SRS resource sets is 4, but the maximum number of SRS ports that can be set in the specific SRS resource set can be increased to 8. In this case, the operation according to the value of the SRS resource set indication field is described in detail below.

[0233] When the SRS resource set indication field is "0" or "1", the base station can schedule S-TRP 8Tx UL PUSCH by utilizing the SRS resources of up to 8 ports configured in one of the two SRS resource sets. In this case, up to 8 Tx PUSCHs (up to 8 bits) can be scheduled using the code point of the reserved SRI field among the two SRI fields. In other words, one 8-bit SRI field (e.g., the first SRI field) can be used for PUSCH scheduling.

[0234] When the SRS resource set indication field is "2" or "3", the existing Rel-17 M-TRP PUSCH repetition operation can be scheduled by using only 4 ports (out of the configured 8-port SRS resources) in each of the two SRS resource sets for M-TRP PUSCH repetition transmission. In order to use only 4 ports out of the 8 port resources configured in a specific SRS resource set for M-TRP transmission, the following operations / configurations can be performed.

[0235] In the case of NCB, up to 4 (1-port) SRS resources with the lowest identification (ID) can be utilized. In other words, four (1-port) SRS resources can be mapped to each SRI field.

[0236] In the case of CB, only the lowest 4 ports of the SRS resource can be used for PUSCH scheduling (when 8-port SRS resources are configured). Alternatively, the lowest SRS resource can be utilized (when multiple 4-port SRS resources are configured to support 8 ports). That is, the SRS resource with the lowest index in each SRS resource set can be mapped to each SRI field.

[0237] According to the above method ii), two SRS resource sets configured for Rel-17 M-TRP PUSCH can be used as is, each SRS resource set including up to 4 ports. In this case, the operation according to the value of the SRS resource set indication field is described in detail below.

[0238] When the SRS resource set indication field is "0" or "1", both SRS resource sets can be used for S-TRP PUSCH transmission. That is, PUSCH scheduling can be performed by utilizing SRS resources corresponding to up to 8 ports included in the two SRS resource sets. In this case, among the two SRI fields, even the reserved SRI field can be used for PUSCH scheduling.

[0239] In addition, as described above, for the following a) or b), the UE may consider / understand that a maximum of 8-port SRS resources using two SRI fields are used for 8Tx S-TRP PUSCH transmission, and perform subsequent maximum 8-layer PUSCH transmission.

[0240] a) when each PUSCH PC parameter for each codepoint configuration / connection indicated in the first SRI field and the second SRI field is the same PC parameter set,

[0241] b) When the PUSCH PC parameter set is configured / connected to only one specific codepoint out of each codepoint indicated in each SRI field

[0242] Or / and, for UEs supporting Rel-18 8Tx UL, when the SRS resource set indication field is "0" or "1" for the two SRI fields related to Rel-17 M-TRPPUSCH, the UE may consider and operate these two sets for S-TRPPUSCH scheduling purposes (up to 8Tx).

[0243] Hereinafter, in embodiments 1) to 3) of Proposal 3, in DCI for supporting the existing Rel-17 M-TRPPUSCH, an indicator / flag configuration / indication for using two SRI fields (with two CB / NCB SRS resource sets) for (S-TRP) 8Tx UL transmission will be described in detail.

[0244] Implementation method 1)

[0245] Based on the presence or absence of the SRS resource set indication field in the DCI (eg, DCI format 0_1 / 0_2), it can be determined whether the two SRI fields of the DCI will be used for M-TRP PUSCH scheduling or (S-TRP) 8Tx UL PUSCH scheduling.

[0246] When the SRS resource set indication field does not exist or is not configured in the DCI, the two SRI fields in the DCI can be used for (S-TRP) 8Tx UL PUSCH scheduling. As an example, the UE can consider and operate the two SRI fields as used for (S-TRP) 8Tx UL PUSCH scheduling.

[0247] When the SRS resource set indication field is configured in the DCI, as in the existing Rel-17 operation, this field can be used for S-TRP / M-TRP switching.

[0248] Implementation method 2)

[0249] A (additional) DCI 1-bit indication field may be introduced to indicate whether the two SRI fields in the DCI (eg, DCI format 0_1 / 0_2) are to be used for M-TRP PUSCH scheduling or for (S-TRP) 8Tx UL PUSCH scheduling.

[0250] For example, when the corresponding 1-bit field is "0 (or 1)", the two SRI fields can be used as the existing Rel-17 M-TRP PUSCH scheduling operation. For example, when the corresponding 1-bit field is "1 (or 0)", the two SRI fields can be used as (S-TRP) 8Tx UL PUSCH scheduling operation.

[0251] Implementation method 3)

[0252] Based on the PUSCH repetition number (set / indicated by DCI), it can be determined whether the two SRI fields will be used for M-TRPPUSCH scheduling or (S-TRP) 8Tx UL PUSCH scheduling.

[0253] For example, when the PUSCH repetition number is set / indicated to a value greater than 1, the two SRI fields of the DCI can be used for the existing Rel-17 M-TRP PUSCH scheduling operation. When the PUSCH repetition number is set / indicated to 1, the two SRI fields can be used for (S-TRP) 8Tx UL PUSCH scheduling operation.

[0254] When two SRI fields are used for (S-TRP)8Tx UL PUSCH scheduling through operation of an implementation scheme, other fields in the DCI for the existing M-TRP PUSCH (for example, at least one of the SRS resource set indication field, the second PTRS-DMRS association field, the second TPMI field, and the second TPC command for scheduled PUSCH field) may not be configured or may be ignored / overwritten by the UE (as unused fields).

[0255] As another example, similar to Proposal 3, up to 8 layers of PUSCH scheduling may be performed by utilizing two SRI fields, but the base station may set the number of SRIs that may be mapped to the first SRI field to (at least) 4. Therefore, only when the first SRI field indicates rank 4 (4C4) (e.g., corresponding to the entry of index 14 in Table 5), the UE may consider / judge that the second SRI field is activated and decode the second SRI field.

[0256] That is, since 4 layers are indicated from the first SRI field and X layers are indicated from the second SRI field, PUSCH scheduling of 4+X layers is possible (i.e., combinations such as 3 layers+3 layers and 3 layers+2 layers may not be supported). Here, when the second SRI field is not activated, the UE may not perform decoding on the second SRI field.

[0257] As an example, when the UE supports up to Y layers, the size of the second SRI field may be defined / set by a value of Y. As an example, the size of the second SRI field may be defined / set by the number of SRS resources set in (one or two) SRS resource sets for NCB usage.

[0258] As a specific example, even if the set number of SRS resources is 8, if Y is 5, the first SRI field can be 4 bits to support the combination of 4 SRIs, and the second SRI field can be composed of 2 bits. That is, the remaining one SRI can be indicated based on two bits. Specifically, based on 2 bits, one SRS resource (one of the combinations of 4C1 (=4)) among the 4 SRS resources can be indicated.

[0259] The above operation can be used for dynamic grant (DG) / configuration grant (CG)-PUSCH scheduling. As an example, in the case of type 1 CG-PUSCH, since PUSCH is activated through RRC configuration, a combination of PC parameter set indication and / or SRI for PUSCH transmission of 4 layers or more layers can be configured / indicated in the corresponding CG-PUSCH related RRC IE, such as the proposal.

[0260] The above proposals / implementations may be used in UE / base station operation in one or more combinations. In other words, as long as no mutually exclusive operations / configurations are pre-assumed, two or more implementations / proposals may be combined and applied to UE / base station operation.

[0261] An example of UE (or BS) operation based on at least one of the above-mentioned embodiments (for example, at least one of Proposal 1 to Proposal 3) is as follows.

[0262] 1) The UE (base station) receives (sends) configuration information for PUSCH transmission.

[0263] The configuration information may include SRS resource set configuration for CB / NCB usage based on Proposal 1 to Proposal 3.

[0264] 2) The UE (base station) receives (sends) a scheduling message for the dynamic grant (DG) / configuration grant (CG)-PUSCH.

[0265] The scheduling message may be received (sent) based on DCI or RRC signaling. As an example, when scheduling is performed via DCI, scheduling may be performed based on Proposals 1 to 3.

[0266] 3) The UE (base station) transmits (receives) the PUSCH based on the message (eg, DCI or RRC signaling).

[0267] The SRI combination and rank and precoder for PUSCH transmission may be determined based on Proposals 1 to 3. As an example, the UE may determine the transmission antenna port, rank and precoder for PUSCH transmission based on Proposals 1 to 3 through SRI indication.

[0268] The UE / base station operations are merely examples, and not every operation (or step) is necessarily required, and operations related to 8Tx UL transmission of the UE according to the above-described embodiment may be omitted or added depending on the UE / base station implementation scheme.

[0269] In terms of implementation, the operation of the base station / UE according to the above embodiments (for example, the operation based on at least one of Proposal 1, Proposal 1-1, Proposal 1-2, Proposal 2 and / or Proposal 3) can be performed by the following description: Figure 6 Devices in (e.g., Figure 6 Processed by processors 110 and 210).

[0270] In addition, the operation of the base station / UE according to the above embodiment (for example, the operation based on at least one of Proposal 1, Proposal 1-1, Proposal 1-2, Proposal 2 and / or Proposal 3) can be used to drive at least one processor (for example, Figure 6 110 and 210) in the form of commands / programs (e.g., instructions and executable codes) stored in a memory (e.g., Figure 6 140 and 240).

[0271] In the following, reference will be made to Figure 4 and Figure 5 The above embodiments are described in detail in terms of the operations of the UE and the base station. The methods to be described below are differentiated only for the convenience of description, and it goes without saying that some components of any one method can be replaced by some components of another method, or can be applied in combination with each other.

[0272] Figure 4 is a flowchart for describing a method performed by a user equipment (UE) according to one embodiment of the present disclosure.

[0273] Reference Figure 4 According to one embodiment of the present disclosure, a method performed by a UE in a wireless communication system includes a step of receiving configuration information related to SRS (S410), a step of receiving configuration information related to PUSCH (S420), a step of receiving DCI for scheduling PUSCH (S430), and a step of sending PUSCH (S440).

[0274] At S410, the UE receives configuration information related to a sounding reference signal (SRS) from a base station. As an example, the configuration information includes information for at least one SRS resource set. As an example, the configuration information may be based on the SRS-Config in Table 1.

[0275] As an example, two SRS resource sets may be configured based on the configuration information related to the SRS. The usage of the two SRS resource sets may be configured as codebook or non-codebook.

[0276] The configuration information may include information related to a configuration based on at least one of Proposal 1, Proposal 1-1, Proposal 1-2, Proposal 1-3, Proposal 2 and / or Proposal 3.

[0277] At S420, the UE receives configuration information related to a physical uplink shared channel (PUSCH) from the base station.

[0278] The transmission scheme related to the PUSCH may be configured as codebook-based transmission or non-codebook-based transmission based on configuration information.

[0279] At S430, the UE receives downlink control information (DCI) for scheduling a PUSCH from the base station.

[0280] According to one embodiment, the DCI may include at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator (SRI) field, and / or iii) a second SRS resource indicator (SRI) field. As an example, the DCI may not include the SRS resource set indicator field (or the number of bits of the SRS resource set indicator field is 0). As an example, the DCI may include only one of the first SRI field and the second SRI field (or the number of bits of any one SRI field (e.g., the second SRI field) is 0).

[0281] At S440 , the UE sends a PUSCH to the base station based on the DCI.

[0282] The number of layers associated with PUSCH may be greater than 4. That is, the number of layers associated with PUSCH may be as high as 8.

[0283] According to one embodiment, PUSCH may be transmitted based on antenna ports. The antenna ports are based on SRS ports associated with one or more SRS resources indicated based on DCI. The embodiment may be based on at least one of Proposal 1, Proposal 2, or Proposal 3. Hereinafter, the embodiment will be described in detail.

[0284] The antenna port may be determined based on i) at least one of eight first SRS ports associated with the first SRS resource set and / or ii) at least one of eight second SRS ports associated with the second SRS resource set.

[0285] The case of using one or both of the two SRS resource sets may be considered. Hereinafter, an implementation of method i) based on Proposal 3 will be described in detail.

[0286] According to one embodiment, based on the value of the SRS resource set indicator field being 0 or 1,

[0287] One or more SRS resources may be indicated based on the first SRI field. One or more SRS resources may be associated with the first SRS resource set or the second SRS resource set. As a specific example, when the value of the SRS resource set indicator field is 0, the SRS resources of the first SRS resource set may be indicated based on the first SRI field. As a specific example, when the value of the SRS resource set indicator field is 1, the SRS resources of the second SRS resource set may be indicated based on the first SRI field.

[0288] At this time, the reserved bits in the second SRI field can be utilized. As an example, the DCI may include only a first SRI field of up to 8 bits. As an example, the DCI may include a first SRI field and a second SRI field, and the number of bits of the second SRI field may be 0. According to one embodiment, the maximum number of bits of the first SRI field may be 8, and the number of bits of the second SRI field may be 0. That is, the first SRI field is not always 8 bits, and the number of bits of the first SRI field may be determined based on the number of SRS resources (Nsrs) set in the SRS resource set and the maximum number of layers (Lmax) (or the maximum number of indicated SRIs).

[0289] As an example, when the number of SRS resources (Nsrs) is 4 and the maximum number of layers (Lmax) is 1 (that is, when only a maximum of one resource (SRI) out of four SRS resources is indicated), the number of bits of the first SRI field can be 2 (see Table 2).

[0290] As an example, when the number of SRS resources (Nsrs) is 4 and the maximum number of layers (Lmax) is 2, 3, or 4 (that is, when only a maximum of 2, 3, or 4 resources out of 4 SRS resources are indicated (SRI)), the number of bits of the first SRI field can be 4 (see Tables 3 to 5).

[0291] As an example, when the number of SRS resources (Nsrs) is 8 and the maximum number of layers (Lmax) is 8 (that is, when a maximum of 8 resources (SRI) out of 8 SRS resources are indicated), the number of bits of the first SRI field can be 8.

[0292] As an example, the antenna port may be determined based on i) five or more first SRS ports among eight first SRS ports or ii) five or more second SRS ports among eight second SRS ports.

[0293] As an example, the PUSCH may be associated with a single transmit and receive point (TRP).

[0294] According to one embodiment, based on the value of the SRS resource set indicator field being 2 or 3,

[0295] The one or more SRS resources may include i) at least one SRS resource indicated based on the first SRI field and ii) at least one SRS resource indicated based on the second SRI field.

[0296] As an example, the antenna port may be determined based on i) up to four first SRS ports among eight first SRS ports or ii) up to four second SRS ports among eight second SRS ports.

[0297] As an example, at least one SRS resource indicated based on each SRI field (e.g., the first SRI field or the second SRI field) may be associated with the first SRS resource set or the second SRS resource set. As a specific example, when the value of the SRS resource set indicator field is 2, at least one SRS resource indicated based on the first SRI field (the second SRI field) may be associated with the first SRS resource set (the second SRS resource set). As a specific example, when the value of the SRS resource set indicator field is 3, at least one SRS resource indicated based on the first SRI field (the second SRI field) may be associated with the second SRS resource set (the first SRS resource set).

[0298] As an example, PUSCH can be associated with multiple transmission and reception points (TRPs).

[0299] The case where two SRS resource sets are used continuously may be considered. Hereinafter, an implementation of method ii) based on Proposal 3 will be described in detail.

[0300] According to one embodiment, based on the value of the SRS resource set indicator field being 0 or 1,

[0301] The one or more SRS resources may include at least one SRS resource indicated based on each SRI field.

[0302] As an example, PUSCH power control parameter sets associated with code points of corresponding SRI fields may be identical to each other.

[0303] As an example, the PUSCH power control parameter set may be associated with only one of the codepoint of the first SRI field and the codepoint of the second SRI field.

[0304] An implementation method that can be applied to determine whether a PUSCH is an S-TRP PUSCH or an M-TRP PUSCH will be described in detail below.

[0305] According to one embodiment, the DCI may include a 1-bit field. The 1-bit field may indicate whether the PUSCH is associated with a single TRP or multiple TRPs.

[0306] According to one embodiment, based on whether the SRS resource set indicator is included in the DCI, it can be determined whether the PUSCH is related to a single TRP or multiple TRPs.

[0307] According to one embodiment, the number of repetitions associated with the PUSCH may be determined based on the DCI. Whether the PUSCH is associated with a single TRP or multiple TRPs may be determined based on the number of repetitions.

[0308] The above operations based on S410 to S440 can be performed by Figure 6 For example, the UE 200 may control one or more transceivers 230 and / or one or more memories 240 to perform operations based on S410 to S440.

[0309] Since each of the above steps S410 to S440 is not necessarily necessary, some steps may be omitted in the method. For example, if it is assumed that the SRS / PUSCH configuration pre-exists in the UE, S410 and / or S420 in the method may be omitted.

[0310] Hereinafter, the above-mentioned embodiments will be described in detail in terms of the operation of a base station.

[0311] S510 to S540 described below correspond to Figure 4 S410 to S440 described in the above description. By considering the corresponding relationship, redundant descriptions are omitted. That is, the specific description of the base station operation described below can be replaced by the corresponding operation. Figure 4 As an example, Figure 4 The description / implementation of S410 to S440 in the embodiment may be additionally applied to the base station operations in S510 to S540 described below.

[0312] Figure 5 is a flowchart for describing a method performed by a base station according to another embodiment of the present disclosure.

[0313] Reference Figure 5 According to another embodiment of the present disclosure, a method performed by a base station in a wireless communication system includes a step of sending configuration information related to SRS (S510), a step of sending configuration information related to PUSCH (S520), a step of sending DCI for scheduling PUSCH (S530), and a step of receiving PUSCH (S540).

[0314] At S510, the base station sends configuration information related to a sounding reference signal (SRS) to a UE.

[0315] At S520, the base station sends configuration information related to a physical uplink shared channel (PUSCH) to the UE.

[0316] At S530, the base station sends downlink control information (DCI) for scheduling the PUSCH to the UE.

[0317] At S540 , the base station receives a PUSCH from the UE based on the DCI.

[0318] The above operations based on S510 to S540 can be performed by Figure 6 For example, the base station 100 may control one or more transceivers 130 and / or one or more memories 140 to perform operations based on S510 to S540.

[0319] Since each of the above steps S510 to S540 is not necessarily necessary, some steps may be omitted in the method. For example, assuming that the base station performs SRS / PUSCH configuration in advance, S510 and / or S520 in the method may be omitted.

[0320] Refer to the following Figure 6 The following describes a device to which the embodiments of the present disclosure are applicable (a device that implements the method / operation according to the embodiments of the present disclosure).

[0321] Figure 6 The configurations of the first device and the second device according to the embodiment of the present disclosure are illustrated.

[0322] The first device 100 may include a processor 110 , an antenna unit 120 , a transceiver 130 , and a memory 140 .

[0323] The processor 110 may perform signal processing related to the baseband, and includes a high-level processing unit 111 and a physical layer processing unit 115. The high-level processing unit 111 may process operations of a MAC layer, an RRC layer, or a higher layer. The physical layer processing unit 115 may process operations of a PHY layer. For example, if the first device 100 is a base station (BS) device in BS-UE communication, the physical layer processing unit 115 may perform uplink received signal processing, downlink transmitted signal processing, etc. For example, if the first device 100 is a first UE device in inter-UE communication, the physical layer processing unit 115 may perform downlink received signal processing, uplink transmitted signal processing, sidelink transmitted signal processing, etc. In addition to performing signal processing related to the baseband, the processor 110 may also control the overall operation of the first device 100.

[0324] The antenna unit 120 may include one or more physical antennas, and if the antenna unit 120 includes multiple antennas, MIMO transmission / reception is supported. The transceiver 130 may include a radio frequency (RF) transmitter and an RF receiver. The memory 140 may store information processed by the processor 110 and software, an operating system, and applications related to the operation of the first device 100. The memory 140 may also include components such as a buffer.

[0325] In the embodiments described in the present disclosure, the processor 110 of the first device 100 may be configured to implement operations of a BS in BS-UE communication (or operations of a first UE device in inter-UE communication).

[0326] The second device 200 may include a processor 210 , an antenna unit 220 , a transceiver 230 , and a memory 240 .

[0327] The processor 210 may perform signal processing related to the baseband, and includes a high-level processing unit 211 and a physical layer processing unit 215. The high-level processing unit 211 may process operations of a MAC layer, an RRC layer, or a higher layer. The physical layer processing unit 215 may process operations of a PHY layer. For example, if the second device 200 is a UE device in BS-UE communication, the physical layer processing unit 215 may perform downlink received signal processing, uplink transmitted signal processing, etc. For example, if the second device 200 is a second UE device in inter-UE communication, the physical layer processing unit 215 may perform downlink received signal processing, uplink transmitted signal processing, side link received signal processing, etc. In addition to performing signal processing related to the baseband, the processor 210 may also control the overall operation of the second device 200.

[0328] The antenna unit 220 may include one or more physical antennas, and if the antenna unit 220 includes multiple antennas, MIMO transmission / reception is supported. The transceiver 230 may include an RF transmitter and an RF receiver. The memory 240 may store information processed by the processor 210 and software, operating systems, and applications related to the operation of the second device 200. The memory 240 may also include components such as a buffer.

[0329] In the embodiments described in the present disclosure, the processor 210 of the second device 200 may be configured to implement the operation of the UE in BS-UE communication (or the operation of the second UE device in inter-UE communication).

[0330] The description of the BS and the UE in BS-UE communication (or the first UE device and the second UE device in inter-UE communication) in the examples of the present disclosure are equally applicable to the operations of the first device 100 and the second device 200, and redundant descriptions are omitted.

[0331] In addition to LTE, NR, and 6G, the wireless communication technology implemented in the apparatus 100 and the apparatus 200 according to the present disclosure may also include a narrowband Internet of Things (NB-IoT) for low-power communication. For example, the NB-IoT technology may be an example of a low-power wide area network (LPWAN) technology and may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2. The NB-IoT technology is not limited to the above names.

[0332] Additionally or alternatively, the wireless communication technology implemented in the apparatus 100 and the apparatus 200 according to the present disclosure may perform communication based on the LTE-M technology. For example, the LTE-M technology may be an example of the LPWAN technology and may be referred to as various names, such as enhanced machine type communication (eMTC). For example, the LTE-M technology may be implemented with at least one of various standards, such as 1) LTE CAT0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M. The LTE-M technology is not limited to the above names.

[0333] Additionally or alternatively, in consideration of low power communication, the wireless communication technology implemented in the apparatus 100 and the apparatus 200 according to the present disclosure may include at least one of ZigBee, Bluetooth, and a low power wide area network (LPWAN), and is not limited to the above names. For example, ZigBee technology may create a personal area network (PAN) related to small / low power digital communication based on various standards such as IEEE 802.15.4, and may be referred to by various names.

Claims

1. A method performed by a user equipment UE in a wireless communication system, the method comprising the following steps: receiving configuration information related to a sounding reference signal SRS, wherein, two SRS resource sets are configured based on the configuration information related to the SRS, and the usage of the two SRS resource sets is configured as a codebook or a non-codebook; receiving configuration information related to a physical uplink shared channel PUSCH, The transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on the configuration information; receiving downlink control information DCI for scheduling the PUSCH, The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field; and sending the PUSCH based on the DCI, wherein the number of layers associated with the PUSCH is greater than 4, Wherein, the PUSCH is sent based on the antenna port, The antenna port is based on an SRS port associated with one or more SRS resources indicated based on the DCI, and The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

2. The method according to claim 1, wherein: Based on whether a value of the SRS resource set indicator field is 0 or 1: indicating the one or more SRS resources based on the first SRI field, and the one or more SRS resources are related to the first SRS resource set or the second SRS resource set.

3. The method according to claim 2, wherein: The maximum number of bits of the first SRI field is 8, and the maximum number of bits of the second SRI field is 0.

4. The method according to claim 2, wherein: The antenna port is determined based on i) five or more first SRS ports among the eight first SRS ports or ii) five or more second SRS ports among the eight second SRS ports.

5. The method according to claim 2, wherein: The PUSCH is associated with a single transmission and reception point TRP.

6. The method according to claim 1, wherein: Based on the value of the SRS resource set indicator field being 2 or 3: the one or more SRS resources include i) at least one SRS resource indicated based on the first SRI field and ii) at least one SRS resource indicated based on the second SRI field.

7. The method according to claim 6, wherein: The antenna ports are determined based on i) up to four first SRS ports among the eight first SRS ports and ii) up to four second SRS ports among the eight second SRS ports.

8. The method according to claim 6, wherein: At least one SRS resource indicated based on each SRI field is related to the first SRS resource set or the second SRS resource set.

9. The method according to claim 6, wherein: The PUSCH is associated with multiple transmission and reception points TRP.

10. The method according to claim 1, wherein: Based on whether a value of the SRS resource set indicator field is 0 or 1: the one or more SRS resources include at least one SRS resource indicated based on each SRI field.

11. The method according to claim 10, wherein: The set of PUSCH power control parameters associated with each code point of the SRI field is the same.

12. The method according to claim 10, wherein: The PUSCH power control parameter set is associated with only one of a code point of the first SRI field and a code point of the second SRI field.

13. The method according to claim 1, wherein: The DCI includes a 1-bit field, and Among them, the 1-bit field indicates whether the PUSCH is related to a single TRP or multiple TRPs.

14. The method according to claim 1, wherein: Based on whether the SRS resource set indicator is included in the DCI, it is determined whether the PUSCH is associated with a single TRP or multiple TRPs.

15. The method according to claim 1, wherein: determining a number of repetitions associated with the PUSCH based on the DCI, and Among them, whether the PUSCH is related to a single TRP or multiple TRPs is determined based on the number of repetitions.

16. A user equipment UE operating in a wireless communication system, the UE comprising: one or more transceivers; one or more processors; as well as one or more memories operatively connectable to the one or more processors and storing instructions that, upon execution by the one or more processors, configure the one or more processors to perform operations, The operations include: receiving configuration information related to a sounding reference signal SRS, wherein two SRS resource sets are configured based on the configuration information related to the SRS, and the usage of the two SRS resource sets is configured as a codebook or a non-codebook, receiving configuration information related to a physical uplink shared channel PUSCH, The transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on the configuration information, receiving downlink control information DCI for scheduling the PUSCH, The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field, and sending the PUSCH based on the DCI, and wherein the number of layers associated with the PUSCH is greater than 4, Wherein, the PUSCH is sent based on the antenna port, The antenna port is based on an SRS port associated with one or more SRS resources indicated based on the DCI, and The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

17. A device, comprising: one or more memories and one or more processors functionally connected to the one or more memories, wherein the one or more memories include instructions that, upon execution by the one or more processors, configure the one or more processors to perform operations, and The operations include: receiving configuration information related to a sounding reference signal SRS, wherein two SRS resource sets are configured based on the configuration information related to the SRS, and the usage of the two SRS resource sets is configured as a codebook or a non-codebook, receiving configuration information related to a physical uplink shared channel PUSCH, The transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on the configuration information, receiving downlink control information DCI for scheduling the PUSCH, The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field, and sending the PUSCH based on the DCI, and wherein the number of layers associated with the PUSCH is greater than 4, Wherein, the PUSCH is sent based on the antenna port, The antenna port is based on an SRS port associated with one or more SRS resources indicated based on the DCI, and The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

18. One or more non-transitory computer-readable media storing one or more instructions, in, One or more instructions executable by one or more processors configure the one or more processors to perform operations, and The operations include: receiving configuration information related to a sounding reference signal SRS, wherein two SRS resource sets are configured based on the configuration information related to the SRS, and the usage of the two SRS resource sets is configured as a codebook or a non-codebook, receiving configuration information related to a physical uplink shared channel PUSCH, The transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on the configuration information, receiving downlink control information DCI for scheduling the PUSCH, The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field, and sending the PUSCH based on the DCI, and wherein the number of layers associated with the PUSCH is greater than 4, Wherein, the PUSCH is sent based on the antenna port, The antenna port is based on an SRS port associated with one or more SRS resources indicated based on the DCI, and The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

19. A method performed by a base station in a wireless communication system, the method comprising the following steps: Sending configuration information related to the sounding reference signal SRS, wherein, two SRS resource sets are configured based on the configuration information related to the SRS, and the usage of the two SRS resource sets is configured as a codebook or a non-codebook; Send configuration information related to the physical uplink shared channel PUSCH, The transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on the configuration information; Sending downlink control information DCI for scheduling the PUSCH, The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field; and receiving the PUSCH based on the DCI, Wherein, the number of layers associated with the PUSCH is greater than 4, Wherein, the PUSCH is received based on the antenna port, The antenna port is based on an SRS port associated with one or more SRS resources indicated based on the DCI, and The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

20. A base station operating in a wireless communication system, the base station comprising: one or more transceivers; one or more processors; as well as one or more memories operatively connectable to the one or more processors and storing instructions that, upon execution by the one or more processors, configure the one or more processors to perform operations, The operations include: Sending configuration information related to the sounding reference signal SRS, wherein two SRS resource sets are configured based on the configuration information related to the SRS, and the usage of the two SRS resource sets is configured as a codebook or a non-codebook, Send configuration information related to the physical uplink shared channel PUSCH, The transmission scheme related to the PUSCH is configured as codebook-based transmission or non-codebook-based transmission based on the configuration information, Sending downlink control information DCI for scheduling the PUSCH, The DCI includes at least one of i) an SRS resource set indicator field, ii) a first SRS resource indicator SRI field, and / or iii) a second SRS resource indicator SRI field, and receiving the PUSCH based on the DCI, and Wherein, the number of layers associated with the PUSCH is greater than 4, Wherein, the PUSCH is received based on the antenna port, The antenna port is based on an SRS port associated with one or more SRS resources indicated based on the DCI, and The antenna port is determined based on i) at least one first SRS port among eight first SRS ports associated with the first SRS resource set and / or ii) at least one second SRS port among eight second SRS ports associated with the second SRS resource set.

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