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

Abstract

A method by which a terminal transmits a signal in a wireless communication system according to at least one embodiment disclosed in the present specification comprises the steps of: receiving downlink control information (DCI) for uplink scheduling; and transmitting a Physical Uplink Shared Channel (PUSCH) multiplexed with Channel State Information (CSI) based on the DCI, in which a rank based on the PUSCH transmission exceeds 4 and the PUSCH includes a plurality of codewords (CW), the CSI is multiplexed on a CW having a highest Modulation and Coding Scheme (MCS) among the plurality of CWs, and the CSI is multiplexed on the CW having the highest Modulation and Coding Scheme (MCS). And the terminal does not anticipate that an uplink shared channel (UL-SCH) indication field in the DCI is to be set to a first value to not perform the UL-SCH transmission.

Description

Technical Field

[0001] This disclosure relates to wireless communication systems, and more specifically, to a method and apparatus for transmitting or receiving downlink / uplink radio signals in a wireless communication system. Background Technology

[0002] Typically, wireless communication systems are evolving to provide communication services such as audio communication and data communication by covering a wider range of areas. Wireless communication is a multiple access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). For example, a multiple access system can be any of the following: Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). Summary of the Invention

[0003] Technical issues

[0004] The technical task to be achieved is to provide a method and apparatus for accurately and efficiently performing wireless signal transmission and reception.

[0005] The technical tasks to be achieved are not limited to this; other technical tasks can be inferred from the implementation methods.

[0006] Technical solution

[0007] According to one aspect, a method for transmitting signals by a user equipment (UE) in a wireless communication system may include the steps of: receiving downlink control information (DCI) for uplink scheduling; and transmitting a Physical Uplink Shared Channel (PUSCH) multiplexed with Channel State Information (CSI) based on the DCI. The PUSCH transmission has a rank greater than 4 and the PUSCH comprises multiple codewords (CWs), and the CSI can be multiplexed over the CW with the highest modulation and coding scheme (MCS) among the multiple CWs. The UE does not expect the Uplink Shared Channel (UL-SCH) indicator field in the DCI to be set to a first value (e.g., 0) to prevent UL-SCH transmission.

[0008] The transmission based on PUSCH has a rank greater than 4 and PUSCH includes multiple CWs, each of which may include a UL-SCH.

[0009] The rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple CWs. No CW will be configured to include only the CSI.

[0010] DCI may include a UL-SCH indicator field. Based on the fact that the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple CWs, the UE may assume that the UL-SCH indicator field is set to a second value to perform the UL-SCH transmission.

[0011] Based on the fact that the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple CWs, the UE may assume that the size of the UL-SCH indicator field is 0 bits.

[0012] The CSI and the first UL-SCH can be reused on a CW with the highest MCS. The second UL-SCH can be reused on another CW without the CSI.

[0013] Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including multiple CWs, the UL-SCH indicator field can be configured to provide information beyond whether a UL-SCH transmission was performed.

[0014] The size of the UL-SCH indicator field in DCI can be determined based on the rank of the PUSCH transmission.

[0015] DCI may include a CSI request field set to a non-zero value.

[0016] According to another aspect, a computer-readable recording medium containing a program for performing the above-described methods may be provided.

[0017] According to another aspect, a device for wireless communication may include: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions. The processor's operations may include: receiving a Direct Instruction Code (DCI) for uplink scheduling; and transmitting a PUSCH multiplexed with a Controlled Indication Sequence (CSI) based on the DCI. The PUSCH-based transmission has a rank greater than 4, and the PUSCH comprises multiple Channel Waves (CWs), with the CSI multiplexed on the CW with the highest modulation and coding scheme (MCS) among the multiple CWs. The device does not anticipate that the UL-SCH indicator field in the DCI will be set to a first value to prevent UL-SCH transmission.

[0018] The device may also include a transceiver.

[0019] The device can be a UE operating in a wireless communication system.

[0020] The device can be a processing apparatus configured to control a UE operating in a wireless communication system.

[0021] According to another aspect, a method for receiving signals by a base station (BS) in a wireless communication system may include the steps of: transmitting a Direct Indicator (DCI) for uplink scheduling; and receiving a multiplexed PUSCH with a CSI based on the DCI. Since the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple Cell Waves (CWs), the BS may set the UL-SCH indicator field in the DCI to a second value for UL-SCH scheduling of all the multiple CWs, and obtain the CSI from the CW with the highest MCS among the multiple CWs.

[0022] According to another aspect, a BS for wireless communication may include: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions. The processor's operations may include: transmitting a Direct Instruction Code (DCI) for uplink scheduling; and receiving a multiplexed PUSCH with a CSI based on the DCI. If the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple Channel Waves (CWs), the BS may set a second value in the DCI to UL-SCH indicator field for UL-SCH scheduling of all the multiple CWs, and obtain the CSI from the CW with the highest MCS among the multiple CWs.

[0023] Beneficial effects

[0024] According to at least one of the disclosed embodiments, wireless signal transmission and reception processing can be performed accurately and efficiently.

[0025] The technical effects are not limited to this; other technical effects can be inferred from the implementation methods. Attached Figure Description

[0026] Figure 1 The physical channel used in the 3rd Generation Partnership Project (3GPP) system, which serves as an exemplary wireless communication system, and the general signal transmission method using it are illustrated.

[0027] Figure 2 The structure of a radio frame is shown.

[0028] Figure 3 The resource grid for the time slot is shown.

[0029] Figure 4 An exemplary mapping of physical channels in a time slot is shown.

[0030] Figure 5 This illustrates exemplary PDSCH and ACK / NACK transmission processing.

[0031] Figure 6 An example PUSCH transmission process is shown.

[0032] Figure 7 An example of a Channel State Information (CSI) related process is shown.

[0033] Figure 8 This illustrates multiple TRP transmissions.

[0034] Figure 9 This demonstrates a method for mapping UCI to PUSCH in the existing NR standard.

[0035] Figure 10 An implementation example of a method for transmitting signals by a user equipment (UE) in a wireless communication system according to an embodiment is shown.

[0036] Figure 11 An implementation example of a method for receiving signals by a base station (BS) in a wireless communication system according to an embodiment is shown.

[0037] Figures 12 to 15 A communication system 1 and a wireless device applicable to this disclosure are shown. Detailed Implementation

[0038] The embodiments disclosed herein are applicable to various radio access technologies such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). CDMA can be implemented as radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented as radio technologies such as IEEE 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Global Microwave Access Interoperability (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS using E-UTRA (E-UMTS), and LTE-Advanced (A) is an evolution of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolution of 3GPP LTE / LTE-A.

[0039] As more and more communication devices require greater communication capacity, there is a need for enhanced mobile broadband communications compared to traditional radio access technologies (RATs). Furthermore, the ability to provide various services anytime, anywhere by connecting multiple devices and objects is another important consideration for next-generation communications. Communication system designs considering reliability and latency-sensitive services / UEs are also being discussed. Therefore, the introduction of new radio access technologies that consider enhanced mobile broadband (eMBB), massive MTC, and ultra-reliable low-latency communication (URLLC) is being discussed. In this disclosure, for simplicity, this technology will be referred to as NR (New Radio or New RAT).

[0040] For the sake of brevity, this disclosure primarily describes 3GPP NR, but the technical concepts herein are not limited thereto.

[0041] In this disclosure, the term "settings" may be replaced with "configuration," and the two are used interchangeably. Furthermore, conditional expressions (e.g., "if," "in the case of," or "when") may be replaced by "based on" or "in the state of." Additionally, the operation or software / hardware (SW / HW) configuration of the user equipment (UE) / base station (BS) can be derived / understood based on the satisfaction of corresponding conditions. When the processing on the receiving (or transmitting) side can be derived / understood from the processing on the transmitting (or receiving) side in signal transmission / reception between wireless communication devices (e.g., BS and UE), its description may be omitted. For example, signal determination / generation / encoding / transmission on the transmitting side can be understood as signal monitoring reception / decoding / determination on the receiving side. Furthermore, when referring to the UE performing (or not performing) a specific operation, this can also be interpreted as the BS expecting / assuming (or not expecting / assuming) the UE to perform that specific operation. Similarly, when referring to the BS performing (or not performing) a specific operation, this can also be interpreted as the UE expecting / assuming (or not expecting / assuming) the BS to perform that specific operation. In the following description, for ease of description, sections, implementation methods, examples, options, methods, and solutions are distinguished and indexed, but this does not mean that each of them necessarily constitutes an independent invention or that each of them should be implemented only individually. Unless explicitly contradictory, it can be deduced / understood that at least some sections, implementation methods, examples, options, methods, and solutions can be combined or omitted.

[0042] In a wireless communication system, a user equipment (UE) receives information from a base station (BS) via a downlink (DL) and transmits information to the BS via an uplink (UL). The information transmitted and received by the BS and UE includes data and various control information, and varies depending on the type / purpose of the information transmitted and received by the UE and BS, encompassing various physical channels.

[0043] Figure 1The physical channel used in a 3GPP NR system and the general signal transmission method using it are shown.

[0044] When the UE is powered on again from a power-off state or enters a new cell, in step S101, the UE performs an initial cell search procedure (e.g., establishing synchronization with the BS). For this purpose, the UE receives a synchronization signal block (SSB) from the BS. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE establishes synchronization with the BS based on the PSS / SSS and obtains information such as the cell identifier (ID). The UE can obtain broadcast information in the cell based on the PBCH. The UE can receive a DL reference signal (RS) during the initial cell search procedure to monitor the DL channel status.

[0045] After the initial cell search, in step S102, the UE can obtain more specific system information by receiving the Physical Downlink Control Channel (PDCCH) and receiving the Physical Downlink Shared Channel (PDSCH) based on the information in the PDCCH.

[0046] In steps S103 to S106, the UE may perform a random access procedure to access the BS. For random access, the UE may send a preamble to the BS on the Physical Random Access Channel (PRACH) (S103) and receive a response message for the preamble on the PDCCH and the corresponding PDSCH (S104). In the case of contention-based random access, the UE may further perform a contention resolution procedure by sending a PRACH (S105) and receiving the PDCCH and the corresponding PDSCH (S106).

[0047] Following the aforementioned process, the UE can receive the PDCCH / PDSCH (S107) and transmit the Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) (S108), as part of the general downlink / uplink signal transmission process. The control information sent from the UE to the BS is called Uplink Control Information (UCI). UCI includes Hybrid Automatic Repeat and Request Acknowledgment / Nack Acknowledgment (HARQ-ACK / NACK), Scheduling Request (SR), Channel State Information (CSI), etc. CSI includes Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indicator (RI), etc. Although UCI is usually transmitted on the PUCCH, it can be transmitted on the PUSCH when control information and service data need to be transmitted simultaneously. Additionally, UCI can be transmitted aperiodically via the PUSCH according to network requests / commands.

[0048] Figure 2The radio frame structure is shown. In NR, uplink and downlink transmissions are configured in frames. Each radio frame is 10ms long and is divided into two 5ms half-frames (HF). Each half-frame is further divided into five 1ms subframes (SF). Subframes are divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols. When using a normal CP, each time slot includes 14 OFDM symbols. When using an extended CP, each time slot includes 12 OFDM symbols.

[0049] Table 1 illustrates, for example, how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS when using normal CP.

[0050] [Table 1]

[0051]

[0052] *N slot symb Number of symbols in a time slot

[0053] *N frame,u slot Number of time slots in a frame

[0054] *N subframe,u slot Number of time slots in a subframe

[0055] Table 2 shows the number of symbols per slot, the number of slots per frame, and the number of slots per subframe that vary according to SCS when using extended CP.

[0056] [Table 2]

[0057]

[0058] The frame structure is only an example. The number of subframes, time slots, and symbols in a frame can vary.

[0059] In NR systems, OFDM parameter sets (e.g., SCS) can be configured differently for multiple cells aggregated for a single UE. Therefore, the (absolute time) duration of time resources (e.g., SF, time slots, or TTI) (referred to as time units (TU) for simplicity) consisting of the same number of symbols can be configured differently among the aggregated cells. Here, symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-Extended-OFDM (DFT-s-OFDM) symbols).

[0060] Figure 3The resource grid shows a time slot. A time slot comprises multiple symbols in the time domain. For example, when using a normal CP, a time slot comprises 14 symbols. However, when using an extended CP, a time slot comprises 12 symbols. A carrier comprises multiple subcarriers in the frequency domain. A resource block (RB) is defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 consecutive subcarriers). A bandwidth portion (BWP) can be defined as multiple consecutive physical RBs (PRBs) in the frequency domain and corresponds to a single set of parameters (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., five) BWPs. Data communication can be performed through enabled BWPs, and only one BWP can be enabled for a UE. In the resource grid, individual elements are called resource elements (REs), and a complex symbol can be mapped to individual REs.

[0061] Figure 4 This illustrates an exemplary mapping of physical channels within a time slot. The PDCCH can be transmitted in the DL control area, and the PDSCH can be transmitted in the DL data area. The PUCCH can be transmitted in the UL control area, and the PUSCH can be transmitted in the UL data area. The Guard Period (GP) provides a time gap for transmit-to-receive mode or receive-to-transmit mode handover at the BS and UE. Some symbols in the subframe during DL-to-UL handover can be configured as GP.

[0062] The physical channels will be described in more detail below.

[0063] The PDCCH transmits the DCI. For example, the PDCCH (i.e., the DCI) may carry information about the transmission format and resource allocation of the DL-SCH, resource allocation information for the Uplink Shared Channel (UL-SCH), paging information for the PCH, system information for the DL-SCH, resource allocation information for higher-layer control messages (e.g., RARs transmitted on the PDCCH), transmission power control commands, information about enabling / releasing configured schedules, etc. The DCI includes Cyclic Redundancy Check (CRC). The CRC is masked using various identifiers (IDs) (e.g., Radio Network Temporary Identifiers (RNTIs)) depending on the owner or purpose of the PDCCH. For example, if the PDCCH is used for a specific UE, the CRC is masked using the UE ID (e.g., Cell-RNTI (C-RNTI)). If the PDCCH is used for paging messages, the CRC is masked using the Paging-RNTI (P-RNTI). If the PDCCH is used for system information (e.g., System Information Block (SIB)), the CRC is masked by the System Information RNTI (SI-RNTI). When the PDCCH is used for RAR, the CRC is masked by the Random Access-RNTI (RA-RNTI).

[0064] The PDCCH comprises 1, 2, 4, 8, or 16 Control Channel Elements (CCEs) depending on its Aggregation Level (AL). A CCE is a logical allocation unit used to provide a specific code rate to the PDCCH based on the radio channel state. A CCE comprises six Resource Element Groups (REGs), each REG defined by one OFDM symbol × one (P)RB. The PDCCH is transmitted in a Control Resource Set (CORESET). A CORESET is defined as a set of REGs with a given set of parameters (e.g., SCS, CP length, etc.). Multiple CORESETs for a UE can overlap in the time / frequency domain. A CORESET can be configured by system information (e.g., Master Information Block (MIB)) or UE-specific higher-layer signaling (e.g., Radio Resource Control (RRC) signaling). Specifically, the number of RBs and symbols (up to 3) in a CORESET can be configured via higher-layer signaling.

[0065] For PDCCH reception / detection, the UE monitors PDCCH candidates. PDCCH candidates are the Common Enquiry Points (CCEs) that the UE should monitor to detect the PDCCH. Each PDCCH candidate is defined as having 1, 2, 4, 8, or 16 CCEs according to the Algorithm (AL). Monitoring includes (blind) decoding of the PDCCH candidates. The set of PDCCH candidates decoded by the UE is defined as the PDCCH Search Space (SS). The SS can be a Common Search Space (CSS) or a UE-Specific Search Space (USS). The UE can obtain the DCI by monitoring PDCCH candidates in one or more SSs configured by the MIB or higher-layer signaling. Each CORESET is associated with one or more SSs, and each SS is associated with a CORESET. SSs can be defined based on the following parameters.

[0066] - controlResourceSetId: CORESET associated with SS.

[0067] - monitoringSlotPeriodicityAndOffset: PDCCH monitoring periodicity (slot) and PDCCH monitoring offset (slot).

[0068] - monitoringSymbolsWithinSlot: PDCCH monitoring symbols within a slot (e.g., the first symbol of CORESET).

[0069] - nrofCandidates: The number of PDCCH candidates (one of 0, 1, 2, 3, 4, 5, 6 and 8) for each AL={1, 2, 4, 8, 16}.

[0070] The timing when a UE needs to monitor PDCCH candidates (e.g., time / frequency resources) is defined as a PDCCH (monitoring) timing. One or more PDCCH (monitoring) timings can be configured in a time slot.

[0071] Table 3 shows the characteristics of each SS.

[0072] [Table 3]

[0073]

[0074] Table 4 shows the DCI format transmitted on the PDCCH.

[0075] [Table 4]

[0076]

[0077] DCI format 0_0 can be used to schedule PUSCH based on TB (or TB level), and DCI format 0_1 ​​can be used to schedule PUSCH based on TB (or TB level) or PUSCH based on code block group (CBG) (or CBG level). DCI format 1_0 can be used to schedule PDSCH based on TB (or TB level), and DCI format 1_1 can be used to schedule PDSCH based on TB (or TB level) or PDSCH based on CBG (or CBG level) (or DL-licensed DCI). DCI formats 0_0 / 0_1 can be referred to as UL-licensed DCI or UL scheduling information, and DCI formats 1_0 / 1_1 can be referred to as DL-licensed DCI or DL ​​scheduling information. DCI format 2_0 is used to transmit dynamic slot format information (e.g., dynamic slot format indicator (SFI)) to the UE, and DCI format 2_1 is used to transmit DL preemption information to the UE. DCI formats 2_0 and / or DCI format 2_1 can be transmitted to the corresponding group of UEs on the group common PDCCH (PDCCH pointing to a group of UEs).

[0078] DCI formats 0_0 and 1_0 can be referred to as fallback DCI formats, while DCI formats 0_1 and 1_1 can be referred to as non-fallback DCI formats. In fallback DCI formats, the DCI size / field configuration remains the same regardless of the UE configuration. Conversely, in non-fallback DCI formats, the DCI size / field configuration varies depending on the UE configuration.

[0079] PDSCH transmits DL data (e.g., DL Shared Channel Transport Block (DL-SCH TB)) using modulation schemes such as Quadrature Phase Shift Keying (QPSK), 16-element Quadrature Amplitude Modulation (16QAM), 64QAM, or 256QAM. TBs are encoded as codewords. PDSCH can transmit up to two codewords. Scrambling and modulation mapping can be performed on a codeword basis, and modulation symbols generated from each codeword can be mapped to one or more layers. Each layer, along with a demodulation reference signal (DMRS), is mapped to a resource, and OFDM symbol signals are generated from the layer mapped with the DMRS and transmitted through the corresponding antenna port.

[0080] PUCCH transmits uplink control information (UCI). UCI includes the following information.

[0081] - SR (Schedule Request): Information used to request UL-SCH resources.

[0082] - HARQ (Hybrid Automatic Repeat Request) - ACK (Acknowledgement): A response to a DL data packet (e.g., a codeword) on the PDSCH. HARQ-ACK indicates whether the DL data packet was successfully received. A 1-bit HARQ-ACK can be sent in response to a single codeword. A 2-bit HARQ-ACK can be sent in response to two codewords. HARQ-ACK responses include positive ACK (simply ACK), negative ACK (NACK), discontinuous transmission (DTX), or NACK / DTX. The term HARQ-ACK is used interchangeably with HARQ ACK / NACK and ACK / NACK.

[0083] - CSI (Channel State Information): Feedback information for the DL channel. MIMO-related feedback information includes RI and PMI.

[0084] Table 5 shows exemplary PUCCH formats. Based on the PUCCH transmission duration, PUCCH formats can be divided into short PUCCH (formats 0 and 2) and long PUCCH (formats 1, 3, and 4).

[0085] [Table 5]

[0086]

[0087] PUCCH format 0 transmits up to 2 bits of UCI and is mapped in a sequence-based manner for easy transmission. Specifically, the UE sends a specific UCI to the BS by transmitting one of multiple sequences on the PUCCH of PUCCH format 0. The UE only transmits the PUCCH of PUCCH format 0 in the PUCCH resource configured for the corresponding SR when the UE sends an affirmative SR.

[0088] PUCCH format 1 transmits up to 2 bits of UCI, and the modulation symbols of UCI are spread in the time domain with orthogonal overlay code (OCC) (configured differently depending on whether frequency hopping is performed). DMRS is transmitted in symbols that do not transmit modulation symbols (i.e., transmitted in time division multiplexing (TDM)).

[0089] PUCCH format 2 transmits more than 2 bits of UCI, and the modulation symbols of the DCI are transmitted using DMRS in frequency division multiplexing (FDM). The DMRS is located at a density of 1 / 3 in symbols #1, #4, #7, and #10 of a given RB. A pseudo-noise (PN) sequence is used for the DMRS sequence. Frequency hopping can be enabled for 2-symbol PUCCH format 2.

[0090] PUCCH format 3 does not support UE multiplexing within the same PRBS and transmits more than 2 bits of UCI. In other words, PUCCH resources in PUCCH format 3 do not include OCC. Modulation symbols are transmitted in TDM using DMRS.

[0091] PUCCH format 4 supports multiplexing of up to four UEs in the same PRBS and transmits more than 2 bits of UCI. In other words, PUCCH resources in PUCCH format 3 include OCC. Modulation symbols are transmitted in TDM using DMRS.

[0092] At least one of one or two or more cells configured for the UE can be configured for PUCCH transmission. At least the primary cell can be set as the cell for PUCCH transmission. Based on the at least one cell configured for PUCCH transmission, at least one PUCCH cell group can be configured for the UE, and each PUCCH cell group includes one or two or more cells. A PUCCH cell group may be simply referred to as a PUCCH group. PUCCH transmission can be configured not only in the primary cell but also in secondary cells (Scells). The primary cell belongs to the primary PUCCH group, and the PUCCH-SCell configured for PUCCH transmission belongs to the secondary PUCCH group. For cells belonging to the primary PUCCH group, the PUCCH on the primary cell can be used. For cells belonging to the secondary PUCCH group, the PUCCH on the PUCCH-SCell can be used.

[0093] PUSCH transmits UL data (e.g., UL Shared Channel Transport Block (UL-SCH TB)) and / or UCI based on CP-OFDM or DFT-s-OFDM waveforms. When PUSCH is transmitted in DFT-s-OFDM waveform, the UE transmits PUSCH via transform precoding. For example, when transform precoding is not possible (e.g., disabled), the UE may transmit PUSCH using CP-OFDM waveform, while when transform precoding is possible (e.g., enabled), the UE may transmit PUSCH using either CP-OFDM or DFT-s-OFDM waveform. PUSCH transmission can be dynamically scheduled via UL authorization in DCI, or semi-statically scheduled via higher-layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling such as PDCCH) (configured scheduling or configured authorization). PUSCH transmission can be performed in a codebook-based or non-codebook-based manner.

[0094] Figure 5 This illustrates an exemplary ACK / NACK transmission process. (Refer to...) Figure 5 The UE can detect the PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1). The PDCCH indicates the DL assignment offset K0 with the PDSCH and the PDSCH offset K1 with the HARQ-ACK report. For example, DCI format 1_0 and DCI format 1_1 may include the following information.

[0095] - Frequency domain resource assignment: Indicates the set of RBs assigned to the PDSCH.

[0096] - Time-domain resource assignment: Indicates the starting position (e.g., OFDM symbol index) and length (e.g., number of OFDM symbols) of K0 and the PDSCH in the time slot.

[0097] - PDSCH-to-HARQ_feedback timer indicator: Indicates K1.

[0098] - HARQ process ID (4 bits): The HARQ process ID that indicates the data (e.g., PDSCH or TB).

[0099] - PUCCH Resource Indicator (PRI): Indicates the PUCCH resource to be used for UCI transmission among multiple PUCCH resources in the PUCCH resource set.

[0100] After receiving the PDSCH in time slot #(n+K0) according to the scheduling information of time slot #n, the UE can send a UCI on the PUCCH in time slot #(n+K1). The UCI may include a HARQ-ACK response to the PDSCH. For convenience, Figure 5The assumption that the SCS of the PDSCH is equal to the SCS of the PUCCH and that slot #n1 = slot #(n+K0) should not be construed as limiting this disclosure. When the SCSs are different, K1 can be indicated / interpreted based on the SCS of the PUCCH.

[0101] When the PDSCH is configured to carry a maximum of one TB, the HARQ-ACK response can be configured in one bit. When the PDSCH is configured to carry a maximum of two TBs, if spatial bundling is not configured, the HARQ-ACK response can be configured in two bits; if spatial bundling is configured, the HARQ-ACK response can be configured in one bit. When time slot #(n+K1) is designated as the timing for HARQ-ACK transmissions of multiple PDSCHs, the UCI transmitted in time slot #(n+K1) includes HARQ-ACK responses for multiple PDSCHs.

[0102] Whether a UE should perform spatial binding in response to a HARQ-ACK response can be configured for each cell group (e.g., via RRC / higher-layer signaling). For example, spatial binding can be configured for individual HARQ-ACK responses sent on the PUCCH and / or on the PUSCH.

[0103] Spatial binding is supported when up to two (or more) TBs (or codewords) can be received at once in the corresponding serving cell (which may be scheduled by a single DCI) (e.g., when the higher-layer parameter maxNrofCodeWordsScheduledByDCI indicates 2 TBs). More than four layers can be used for 2TB of transmission, and up to four layers can be used for 1TB of transmission. As a result, when spatial binding is configured for a corresponding cell group, spatial binding can be performed for serving cells within the cell group that can be scheduled for more than four layers. A UE wishing to send a HARQ-ACK response via spatial binding can generate a HARQ-ACK response by performing a (bit-wise) logical AND operation on the A / N bits of multiple TBs.

[0104] For example, suppose a UE receives a DCI that schedules two TBs and receives the two TBs on the PDSCH based on the DCI. The UE performing spatial bundling can generate a single A / N bit by performing a logical AND operation between the first A / N bit of the first TB and the second A / N bit of the second TB. As a result, when both the first TB and the second TB are ACK, the UE reports the ACK bit value to the BS, and when at least one TB is NACK, the UE reports the NACK bit value to the BS.

[0105] For example, when only one TB is actually scheduled in a serving cell configured to receive two TBs, the UE can generate a single A / N bit by performing a logical AND operation on the A / N bit and bit value 1 of a TB. As a result, the UE reports the A / N bit of one TB to the BS.

[0106] Multiple parallel DL HARQ processes exist at the BS / UE for DL ​​transmission. While the BS awaits HARQ feedback indicating the success or failure of a previous DL transmission, multiple parallel HARQ processes allow for continuous DL transmission. Each HARQ process is associated with a HARQ buffer in the Media Access Control (MAC) layer. Each DL HARQ process manages status variables such as the number of MAC Physical Data Unit (PDU) transmissions, HARQ feedback to MAC PDUs in the buffer, and the current redundant version. Each HARQ process is identified by a HARQ process ID.

[0107] Figure 6 An exemplary PUSCH transmission process is shown. (Refer to...) Figure 6 The UE can detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or 1_1). DCI format 1_0 or 1_1 may include the following information.

[0108] - Frequency domain resource assignment: Indicates the set of RBs assigned to PUSCH.

[0109] - Time-domain resource assignment: Indicates the slot offset K2 and the start position (e.g., OFDM symbol index) and duration (e.g., number of OFDM symbols) of the PUSCH within the slot. The start symbol and length of the PUSCH can be indicated by the start and length indicator value (SLIV) or separately.

[0110] Then, the UE can send the PUSCH in time slot #(n+K2) according to the scheduling information in time slot #n. The PUSCH includes the UL-SCH TB.

[0111] CSI related operations

[0112] Figure 7 An example of a CSI-related process is shown.

[0113] The UE receives CSI-related configuration information from the BS via RRC signaling (710). The CSI-related configuration information may include at least one of the following: Channel State Information-Interference Measurement (CSI-IM) related information, CSI measurement related information, CSI resource configuration related information, CSI-RS resource related information, or CSI report configuration related information.

[0114] - CSI-IM resources can be configured for UE interference measurements (IM). In the time domain, CSI-IM resource sets can be configured as periodic, semi-persistent, or aperiodic. CSI-IM resources can be configured as UE zero-power (ZP)-CSI-RS. ZP-CSI-RS can be configured to be distinguished from non-zero-power (NZP)-CSI-RS.

[0115] - The UE may assume that the CSI-RS resources configured for channel measurements and the CSI-IM / NZP CSI-RS resources configured for interference measurements for a CSI report have a QCL relationship with respect to the "QCL-TypeD" of the respective resources (when the NZP CSI-RS resources are used for interference measurements).

[0116] - CSI resource configuration may include at least one of CSI-IM resources for interference measurement, NZP CSI-RS resources for interference measurement, and NZP CSI-RS resources for channel measurement. The channel measurement resource (CMR) may be an NZP CSI-RS for CSI acquisition, and the interference measurement resource (IMR) may be an NZP CSI-RS for both CSI-IM and IM.

[0117] - CSI-RS can be configured for one or more UEs. Different CSI-RS configurations can be provided for each UE, or the same CSI-RS configuration can be provided to multiple UEs. CSI-RS can support up to 32 antenna ports. CSI-RS corresponding to N (N is 1 or greater) antenna ports can be mapped to N RE locations within a time-frequency cell corresponding to one time slot and one RB. When N is 2 or greater, N-port CSI-RS can be multiplexed using CDM, FDM, and / or TDM methods. CSI-RS can be mapped to the remaining REs except for those mapped to CORESET, DMRS, and SSB. In the frequency domain, CSI-RS can be configured for the entire bandwidth, a portion of the bandwidth (BWP), or a portion of the bandwidth. CSI-RS can be transmitted in each RB within the bandwidth where CSI-RS is configured (i.e., density = 1), or CSI-RS can be transmitted in every two RBs (e.g., even or odd RBs) (i.e., density = 1 / 2). When CSI-RS is used as a Tracking Reference Signal (TRS), a single-port CSI-RS can be mapped onto three subcarriers in each resource block (i.e., density = 3). One or more CSI-RS resource sets can be configured for the UE in the time domain. Each CSI-RS resource set may include one or more CSI-RS configurations. Each CSI-RS resource set can be configured as periodic, semi-persistent, or aperiodic.

[0118] - CSI report configuration may include configuration of feedback type, measurement resources, report type, etc. NZP-CSI-RS resource sets can be used for the corresponding UE's CSI report configuration. NZP-CSI-RS resource sets can be associated with CSI-RS or SSB. Multiple periodic NZP-CSI-RS resource sets can be configured as TRS resource sets. (i) Feedback types include Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SSB Resource Block Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), Layer 1 (L1) - Reference Received Strength (RSRP), etc. (ii) Measurement resources may include configuration of downlink signals and / or downlink resources that the UE performs measurements to determine feedback information. Measurement resources can be configured as ZP and / or NZP CSI-RS resource sets associated with the CSI report configuration. NZP CSI-RS resource sets may include CSI-RS sets or SSB sets. For example, L1-RSRP can be measured for a CSI-RS set or an SSB set. (iii) Report types may include the timing of the UE reporting and the configuration of the uplink channel. Reporting time can be configured to be periodic, semi-persistent, or aperiodic. Periodic CSI reports can be sent on the PUCCH. Semi-persistent CSI reports can be sent on the PUCCH or PUSCH based on a Media Access Control (MAC) control element (CE) indicating whether it is enabled or disabled. Aperiodic CSI reports can be indicated by DCI signaling. For example, the uplink-granted CSI request field can indicate one of various report trigger sizes. Aperiodic CSI reports can be sent on the PUSCH.

[0119] The UE measures CSI based on configuration information related to CSI. CSI measurement may include receiving CSI-RS (720) and obtaining CSI by calculating the received CSI-RS (730).

[0120] The UE may send a CSI report to the BS (740). For the CSI report, the time and frequency resources available to the UE are controlled by the BS. Channel State Information (CSI) includes at least one of the following: Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Resource Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), L1-RSRP, and / or L-SINR.

[0121] CSI reporting supports periodic, semi-permanent, and aperiodic temporal behavior. i) Periodic CSI reporting is performed in short and long PUCCHs. The periodicity and slot offset of periodic CSI reports can be configured by RRC, and refer to CSI-ReportConfig IE. ii) SP (semi-periodic) CSI reporting is performed in short, long, or PUSCHs. For SP CSI in short / long PUCCHs, the periodicity and slot offset are configured by RRC, and CSI reporting is enabled / disabled via a separate MAC CE / DCI. For SP CSI in PUSCHs, the periodicity of SP CSI reporting is configured by RRC, but the slot offset is not configured by RRC, and SP CSI reporting is enabled / disabled by DCI (format 0_1). For SP CSI reporting in PUSCHs, a separate RNTI (SP-CSI C-RNTI) is used. The initial CSI report timing follows the PUSCH temporal allocation value indicated by the DCI, and subsequent CSI report timing follows the periodicity configured by RRC. DCI format 0_1 ​​may include a CSI request field and enable / disable a specific configuration of SP-CSI triggering status. SP CSI reports have the same or similar enable / disable mechanism as data transmission in the SPS PUSCH. iii) Non-periodic CSI reporting is performed in the PUSCH and triggered by the DCI. In this case, information related to the triggering of non-periodic CSI reports can be transmitted / indicated / configured via MAC-CE. For AP CSI with AP CSI-RS, the AP CSI-RS timing is configured by RRC, and the timing of AP CSI reports is dynamically controlled by the DCI.

[0122] Quasi-isotope (QCL)

[0123] When the channel properties of one antenna port are to be inferred from the channel properties of another antenna port, the two antenna ports are quasi-co-located. Channel properties may include one or more of the following: delay spread, Doppler spread, frequency / Doppler shift, average received power, receive timing / average delay, and spatial RX parameters.

[0124] A list of multiple TCI state configurations can be configured for the UE via the higher-level parameter PDSCH-Config. Each TCI state is associated with a QCL configuration parameter between one or two DL reference signals and the DM-RS port of the PDSCH. The QCL may include qcl-Type1 of the first DLRS and qcl-Type2 of the second DLRS. The QCL type may correspond to one of the following.

[0125] - “QCL-TypeA”: {Doppler frequency shift, Doppler spread, average delay, delay spread}

[0126] - "QCL-TypeB": {Doppler frequency shift, Doppler spread}

[0127] - "QCL-TypeC": {Doppler shift, average delay}

[0128] - "QCL-TypeD": {Space Rx parameter}

[0129] Operations related to multiple transmit and receive points (M-TRP)

[0130] Figure 8 This illustrates a multi-TRP (M-TRP) transmission. (See reference...) Figure 8 (a) A set of layers sending the same codeword (CW) (or TB) corresponds to different TRPs. See reference. Figure 8 (b) Different CWs are transmitted through different TRP layer groups. In this case, it can be assumed that the TBs corresponding to CW #1 and CW #2 in the diagram are the same. In other words, CW #1 and CW #2 mean that the same TB is converted into different CWs through channel coding, etc., of different TRPs. Therefore, this can be regarded as an example of repeated transmission of the same TB. Figure 8 In case (b), with Figure 8 Compared to (a), it may have the disadvantage of a higher coding rate corresponding to TB. However, Figure 8 (b) has the advantage that the coding rate can be adjusted by indicating different redundancy version (RV) values ​​of the coding bits generated from the same TB, or the modulation order of each CW can be adjusted, depending on the channel environment.

[0131] according to Figure 8 (a) and Figure 8 The method shown in (b) repeatedly transmits the same TB through different layer groups. Furthermore, since each layer group is transmitted by a different TRP / panel, the probability of the UE successfully receiving data can be increased. This method is called M-TRP URLLC transmission based on spatial division multiplexing (SDM). Layers belonging to different layer groups are transmitted through DMRS ports belonging to different DMRS code division multiplexing (CDM) groups.

[0132] Although the above-mentioned M-TRP related content is explained based on the SDM method using different layers, it can be extended and applied to FDM methods based on different frequency domain resources (e.g., RB / PRB sets) and / or TDM methods based on different time domain resources (e.g., time slots, symbols, sub-symbols, etc.).

[0133] Figure 9 This shows the UCI mapped to PUSCH in the existing NR standard.

[0134] Distributed UCI mapping rules are applied within OFDM symbols by comparing unmapped UCI REs with available REs in OFDM symbols.

[0135] - Starting from the first non-DM-RS symbol after the first DMRS symbol, map the HARQ-ACK RE to the available RE in a frequency-priority manner.

[0136] - Starting with the first non-DM-RS symbol, map CSI section 1 REs to available REs in a frequency-priority manner.

[0137] - Starting from the first non-DM-RS symbol, map CSI Part 2 REs to available REs in a frequency-priority manner.

[0138] Reference Figure 9 Unlike LTE, in HARQ-ACK, REs are mapped first, followed by CSI Part 1 and CSI Part 2, and then PUSCH. If the REs used for HARQ-ACK / CSI do not fit perfectly within a single symbol, they are first used to fill one symbol, and the remaining REs are mapped evenly to other symbols in a distributed manner. Subsequent UCIs are then mapped sequentially according to the above rules.

[0139] UL transmission based on multiple antenna ports and multiple CW (or TB)

[0140] The following describes a UE transmitting multiple codewords (CWs) over multiple transmit antenna ports on the UL, and methods supporting this. The implementations described later can be used (but are not limited to) for transmissions based on an 8Tx UL codebook, particularly for 2-CW transmissions of UEs with multiple antennas and / or multiple panels in environments similar to New Radio Access Technology (RAT) with multiple antennas / panels. The term CW may be replaced with Transport Block (TB).

[0141] In existing NR standards, one CW is supported for UL transmission based on a maximum of four antenna ports. However, recent NE standardization is discussing a method of supporting two CWs for UL transmission based on a maximum of eight transmission antenna ports. Table 6 summarizes the main standardization discussion topics related to UL 2-CW support.

[0142] [Table 6]

[0143]

[0144] As described in Table 6, 2-CW transmissions are supported when the (maximum) rank exceeds 4. For 2-CW scheduling, the MCS, NDI, and RV fields of the second CW are added to the DCI. When UCI multiplexing is required, the UCI is multiplexed only on the CW with the higher MCS. However, when the CWs are the same, it is multiplexed on the first CW. When a priority indication exists for the corresponding UL transmission in the physical layer, the indicated priority is applied to both CWs. Furthermore, the UL-licensed DCI format for 2-CW scheduling includes a single UL-SCH indicator field as before. In other words, two separate UL-SCH indicator fields are not provided for the two corresponding CWs.

[0145] As shown in Table 6, whether CSI-only PUSCH is supported in 2-CW transmissions with rank > 4, and if so, how to apply / determine / indicate CSI-only CW for both CWs, requires further discussion / definition (FFS).

[0146] Therefore, this disclosure proposes a method for applying / assuming UL-SCH indicators and their signaling that are only related to CSI during 2-CW transmissions (i.e., rank > 4 transmissions).

[0147] In the following description, scheduling / indication with a rank > 4 can mean that the number of layers indicated by the DCI (e.g., the number of layers indicated by the precoding and layer digital segments) exceeds 4. In other words, when the number of layers indicated by the DCI (e.g., the number of layers indicated by the precoding and layer digital segments) exceeds 4, the UE performs 2-CW (or 2-TB) transmission.

[0148] First, the UL-SCH indicator fields defined in the existing NR standard will be described. Table 7 is an excerpt of the UL-SCH indicators defined in the existing NR Rel. 17 standard document TS 38.212, which supports UL transmission of 1 CW through up to 4 transmit antenna ports.

[0149] [Table 7]

[0150]

[0151] The UL-SCH indicator is a 1-bit indicator field included in the DCI, introduced to explicitly indicate whether the corresponding CW / TB carries UL-SCH. Referring to Table 7, the UL-SCH indicator field, combined with the CSI request field, indicates whether the corresponding CW / TB is scheduled to carry a UCI with UL-SCH or a UCI without UL-SCH. All bits of the CSI request field being zero means that no CSI request has been made.

[0152] As noted in Table 6, the DCI for scheduling two CWs also includes only one UL-SCH indicator field, as before. When this single UL-SCH indicator field is extended to a 2-CW scenario, the scheduled PUSCH can be represented as shown in Table 8.

[0153] [Table 8]

[0154]

[0155] As described with reference to Table 6, UCI is multiplexed on the CW with the higher MCS (or the first CW if both MCS values ​​are the same). For ease of description, Table 8 assumes that the first CW is scheduled to have a higher MCS than the second CW. However, the proposal of this disclosure can also be applied to the opposite case (i.e., the second CW has an MCS higher than the first CW). In Case 1 of Table 8, when UCI is present, UCI is mapped to the first CW. When the UL-SCH indicator is "1" and the code points in the CSI request field are not all zero, the first CW is transmitted as UCI with UL-SCH. When the UL-SCH indicator is "1" and the code points in the CSI request field are all zero, UL-SCH is transmitted only in the first CW. That is, the transmission combination is the UL-SCH in the first CW and the UL-SCH in the second CW.

[0156] Suggestion 1

[0157] Regarding Case 1 in Table 8, the following assumptions are made regarding the existence of the UL-SCH indicator and UL-SCH.

[0158] When scheduling 2-CW PUSCH transmissions (rank > 4) (e.g., via DCI formats 0_1 and 0_2), the configuration is such that UL-SCH is always included in both TB / CW. When scheduling 1-CW PUSCH transmissions, the presence / inclusion of UL-SCH transmissions can be determined based on the UL-SCH indicator. For example, when scheduling 2-CW PUSCH for a UE, the UE can ignore the UL-SCH indicator included in the scheduled DCI or always assume it to be "1". For example, when scheduling 2-CW PUSCH for a UE, the UE can assume that the UL-SCH indicator field in the DCI is always configured with 0 bits, and the BS can reduce the DCI payload by configuring the UL-SCH indicator field with 0 bits.

[0159] Proposal 1 primarily considers Case 1, where the UL-SCH is always included in both CWs during dual CW transmissions (although Case 2 also applies). Therefore, the UL-SCH indicator may not be needed in DCIs used for dual CW scheduling. The UL-SCH indicator is needed in DCIs used for single CW transmissions (when the rank is 4 or less). For dual CW scheduling, one of the following options can be configured / used for the UL-SCH indicator.

[0160] (1) Option 1

[0161] When scheduling dual CW PUSCH, the UE / BS assumes / configures the UL-SCH indicator to 0 bits.

[0162] Typically, when comparing the maximum payload of a single-CW transmission and a dual-CW transmission, the maximum payload of a dual-CW transmission is greater than that of a single-CW transmission due to the addition of a second set of MCS / RV / NDIs. Therefore, when the maximum rank is set to greater than 4 (e.g., maximum rank = 6 or 8), the field size excluding the UL-SCH indicator can be calculated from the DCI maximum payload. When the maximum rank is 4 or less (e.g., maximum rank = 1, 2, or 4), it is a single-CW transmission, and therefore the UL-SCH indicator field is included in the DCI maximum payload calculation.

[0163] Therefore, the payload size of the DCI format supporting dual CW PUSCH scheduling can be determined based on the size of the fields required when scheduling dual CW PUSCH (e.g., the size of the second set of MCS / RV / NDI) and the size of the 0-bit UL-SCH indicator field (e.g., determined as their sum).

[0164] (2) Option 2

[0165] When scheduling dual CW PUSCH, the UL-SCH indicator can be reused to indicate another (existing or new) parameter / indicator in the DCI, rather than indicating the presence of UL-SCH transmission. For example, when scheduling dual CW PUSCH, the UL-SCH indicator can be reused to indicate (but not limited to) at least one of the following information.

[0166] - RV of the 1st / 2nd CW

[0167] - MCS of the 1st / 2nd CW

[0168] - NDI of the 1st / 2nd CW

[0169] - TRI / TPMI

[0170] - Reuse CW indexes with UCI: For example, when the CSI request field is not all zeros and the UL-SCH indicator is "1", the UCI is reused on the first CW; if it is "0", the UCI is reused on the second CW. (Or conversely, when the UL-SCH indicator is "0", the UCI is reused on the first CW; when it is "1", the UCI is reused on the second CW). For example, when the CSI request field is all zeros, the value of the UL-SCH indicator is ignored.

[0171] Suggestion 2

[0172] Case 2 in Table 8 can be considered a special case of Case 1. In Case 2, the first CW is scheduled for UCI-only transmission, and the second CW is scheduled for UL-SCH transmission. For Case 2, the application / configuration of the UL-SCH indicator can follow Proposal 2.

[0173] When scheduling 2-CW PUSCH (rank > 4) (e.g., via DCI formats 0_1 and 0_2), the UE assumes that the indication via the UL-SCH indicator in the DCI (e.g., ignoring UL-SCH transmissions) applies only to a specific single TB / CW index, and that UL-SCH transmissions are included / indicated in another single TB / CW index.

[0174] The specific TB / CW index for which the UL-SCH indicator is applied can be determined by 1) a lower or higher TB / CW index, or 2) a TB / CW index with a higher MCS (or a lower or higher TB / CW index if the MCS of the two TB / CWs are the same).

[0175] The CW transmitted as a UCI-only signal can be determined based on the UCI multiplexing rules. In the example above, it is assumed that UCI is multiplexed on the TB / CW with a higher MCS.

[0176] Case 3 refers to the situation where only UCI is mapped onto two CW / TB and transmitted. This is for cases where there are a large number of UCIs to be transmitted (e.g., HARQ-ACK and / or CSI Part 1 and / or CSI Part 2) or where UCIs need to be transmitted more robustly.

[0177] Suggestion 3

[0178] When scheduling 2-CW PUSCH (rank > 4) (e.g., via DCI formats 0_1 and 0_2), the indication via the UL-SCH indicator in the DCI can be applied to both TB / CW indexes.

[0179] (1) When the UL-SCH indicator is 0 and the CSI request fields are not all zero, repeat the (same) UCI ​​on both CWs without UL-SCH. (e.g., case 3)

[0180] - First, the UE can assume that only one CW is scheduled to perform encoding / rate matching / RE mapping on the UCI, and then the UCI mapped in this way is mapped (copied and pasted) to another CW in the same way.

[0181] -And / or, although the UCI mapped to each of the two CWs is the same, the size of the encoded UCI bits between the two CWs may be different depending on the transmission parameters of each CW (e.g., MCS, etc.), and the encoded UCI bits may be mapped to each CW.

[0182] - And / or, while the CSI report indicated by the CSI request field is (repeatedly) mapped to two CWs, other UCIs (e.g., HARQ-ACK) may be mapped only to a specific single CW (which may be determined by the CW index with the higher MCS among the two CWs (or the lower CW index if the MCSs of the two CWs are the same)).

[0183] (2) When the UL-SCH indicator is 1 and the CSI request field is not all zero, the UCI is reused on the CW corresponding to the highest MCS (or the first CW if the MCS values ​​of the two CWs are the same).

[0184] The advantage of the above proposals 1 / 2 / 3 is that even when using a single UL-SCH indicator, dual CW PUSCH transmission can be effectively performed without ambiguity in the indication from the BS.

[0185] However, Proposal 3 may violate the existing consensus rules for UCI multiplexing (UCI is multiplexed on a single CW). Therefore, the UE will not expect a scenario where only the UCI is transmitted on both CWs. That is, when the indication via the UL-SCH indicator in the DCI in Proposal 3 is applied to both TB / CW indices, the UE will not expect scheduling with UL-SCH indicator = 0, all CSI request fields set to zero, and rank > 4. For example, when the indicator rank > 4 (e.g., when the number of UL-licensed DCI indicator layers, such as DCI format 0_1, is > 4), the UE will not expect to receive a UL-licensed DCI including UL-SCH indicator = 0. In other words, when the indicator rank > 4 (e.g., when the number of UL-licensed DCI indicator layers, such as DCI format 0_1, is > 4), the UE will not expect the UL-SCH indicator included in the DCI to be 0. Therefore, when the indication rank is >4 (e.g., when the number of UL-permitted DCI indication layers, such as DCI format 0_1, is >4), the UE can expect to receive UL-SCH indication 1, which can be understood as the same concept that the UE assumes to include UL-SCH indication 1 in the scheduled DCI when scheduling 2-CW PUSCH, as described in Proposal 1.

[0186] Suggestion 4

[0187] For dual-CW PUSCH scheduling, an indication of the presence or absence of a UL-SCH can be provided individually for each CW. Compared to proposals 1 / 2 / 3, this offers the advantage of increased scheduling flexibility for the BS. Therefore, the following is proposed.

[0188] When scheduling 2-CW PUSCH (rank > 4) (e.g., via DCI formats 0_1 and 0_2), a 2-bit UL-SCH indicator in the DCI can indicate the presence of UL-SCH transmission and / or indicate UL-SCH and UCI for each CW. The size of the UL-SCH indicator field in the DCI can be determined based on the maximum rank value. For example, when the maximum rank is greater than 4, the UL-SCH indicator field can be 2 bits; when the maximum rank is 4 or less, the UL-SCH indicator field can be configured as 1 bit as before. Alternatively, the UL-SCH indicator is configured as 2 bits, where 1 bit corresponds to an existing UL-SCH indicator field, and the other bit can be 1 bit of unused / remaining bits from another field (e.g., the antenna port field) during 2-CW PUSCH scheduling.

[0189] For example, in Proposal 4, the MSB of the 2-bit UL-SCH indicator can indicate whether there is a UL-SCH transmission for the first CW, and its LSB can indicate whether there is a UL-SCH transmission for the second CW.

[0190] In this case, the MSB and LSB can be indicated as shown in Table 9, and whether UCI multiplexing is performed can be determined based on the value of the CSI request field. For example, when MSB=1 and LSB=1 are scheduled in the UL-SCH indicator, and the CSI request field is not all zero, this means that in Case 1, CW 1: UCI with UL-SCH. When MSB=1 and LSB=1 are scheduled in the UL-SCH indicator, and the CSI request field is all zero, this means that UCI without UL-SCH.

[0191] [Table 9]

[0192]

[0193] Alternatively, the code points of the 2-bit UL_SCH indicator can be used to represent the above cases and / or UCI mappings, as shown in Table 10.

[0194] [Table 10]

[0195]

[0196] In this case, the UCI reuse rule can be a rule that maps the UCI to the CW corresponding to the higher MCS (or the first CW if the two MCS values ​​are the same).

[0197] Proposals 1, 2, 3 and 4 above can be used individually or by combining at least some of them.

[0198] Figure 10 An exemplary implementation of a method for transmitting signals by a UE in a wireless communication system according to an embodiment is shown.

[0199] Reference Figure 10 The UE can receive DCI (A05) for UL scheduling.

[0200] The UE can multiplex the UCI onto the PUSCH (A10). The UCI may include the CSI.

[0201] The UE can transmit multiplexed PUSCH (A15) based on DCI.

[0202] Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH comprising multiple CWs, the CSI can be multiplexed on the CW with the highest MCS among the multiple CWs. The UE will not expect the UL-SCH indicator field in the DCI to be set to a first value (e.g., 0) to prevent UL-SCH transmission.

[0203] The transmission based on PUSCH has a rank greater than 4 and PUSCH includes multiple CWs, each of which may include a UL-SCH.

[0204] The rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple CWs. No CW can be configured to include only CSI.

[0205] DCI may include a UL-SCH indicator field. Based on the fact that the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple CWs, the UE may assume that the UL-SCH indicator field is set to a second value (e.g., 1) to perform the UL-SCH transmission.

[0206] Based on the fact that the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple CWs, the UE may assume that the size of the UL-SCH indicator field is 0 bits.

[0207] The CSI and the first UL-SCH can be reused on a CW with the highest MCS. The second UL-SCH can be reused on another CW without the CSI.

[0208] Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including multiple CWs, the UL-SCH indicator field can be configured to provide information beyond whether a UL-SCH transmission was performed.

[0209] The size of the UL-SCH indicator field in DCI can be determined based on the rank of the PUSCH transmission.

[0210] DCI may include a CSI request field set to a non-zero value.

[0211] Figure 11 An implementation example of a method for receiving signals by a BS in a wireless communication system according to an embodiment is shown.

[0212] Reference Figure 11 The BS can send a DCI (B05) for UL scheduling. The DCI may include a UL-SCH indicator field. Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including multiple CWs, the BS can set the UL-SCH indicator field in the DCI to a second value (e.g., 1) to UL-SCH schedule all multiple CWs.

[0213] The BS can receive multiplexed PUSCH (B10) with UCI based on DCI.

[0214] The BS can obtain the UCI (B15) from the PUSCH. The UCI may include the CSI. Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH comprising multiple CWs, the BS can obtain the CSI from the CS with the highest MCS among the multiple CWs.

[0215] The transmission based on PUSCH has a rank greater than 4 and PUSCH includes multiple CWs, each of which may include a UL-SCH.

[0216] The rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple CWs. No CW can be configured to include only CSI.

[0217] The CSI and the first UL-SCH can be reused on a CW with the highest MCS. The second UL-SCH can be reused on another CW without the CSI.

[0218] The size of the UL-SCH indicator field in DCI can be determined based on the rank of the PUSCH transmission.

[0219] DCI may include a CSI request field set to a non-zero value.

[0220] Figure 12 A communication system 1 applied to this disclosure is shown.

[0221] Reference Figure 12 The communication system 1 includes wireless devices, base stations (BS), and networks. In this document, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. Wireless devices may include (but are not limited to) robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, Internet of Things (IoT) devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of performing communication between vehicles. In this document, vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and may take the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses) and computers (e.g., laptops). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, the BS and network may be implemented as wireless devices, and a particular wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0222] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can perform direct communication with each other (e.g., sidelink communication) without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0223] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or between BS 200 and BS 200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). Wireless devices and BS / wireless devices can transmit / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals via various physical channels. For this purpose, at least a portion of the configuration information for configuring the process of transmitting / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes can be performed based on various proposals of this disclosure.

[0224] Figure 13 A wireless device applicable to this disclosure is shown.

[0225] Reference Figure 13 The first wireless device 100 and the second wireless device 200 can transmit radio signals via various RATs (e.g., LTE and NR). In this document, {first wireless device 100 and second wireless device 200} can correspond to... Figure 12 {Wireless Device 100x and BS 200} and / or {Wireless Device 100x and Wireless Device 100x}.

[0226] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal via the transceivers 106. The processor 102 may receive a radio signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memory 104. The memory 104 may be connected to the processor 102 and may store various information relating to the operation of the processor 102. For example, the memory 104 may store software code including commands for performing some or all of the processes controlled by the processor 102 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. In this document, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. Transceiver 106 may be used interchangeably with radio frequency (RF) units. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0227] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processors 202 may process information in the memories 204 to generate a third information / signal, and then transmit a radio signal including the third information / signal via the transceivers 206. The processors 202 may receive a radio signal including a fourth information / signal via the transceivers 206, and then store the information obtained by processing the fourth information / signal in the memories 204. The memories 204 may be connected to the processors 202 and may store various information relating to the operation of the processors 202. For example, the memories 204 may store software code including commands for executing some or all of the processes controlled by the processors 202 or for executing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. In this document, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver 206 may be used interchangeably with an RF unit. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0228] The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by (but are not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) and acquire PDUs, SDUs, messages, control information, data, or information from one or more transceivers 106 and 206, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document.

[0229] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document can be implemented using firmware or software in the form of code, commands, and / or command sets.

[0230] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be configured with read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0231] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operation flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive radio signals. For example, one or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein via one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing by one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc., processed by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0232] Figure 14 Another example of a wireless device applied to this disclosure is shown. The wireless device may vary depending on usage / service (see reference). Figure 12 It is realized in various forms.

[0233] Reference Figure 14 Wireless devices 100 and 200 can correspond to Figure 13The wireless devices 100 and 200 are configured with various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include... Figure 13 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, transceiver 114 may include Figure 13 The device comprises one or more transceivers 106 and 206 and / or one or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, memory unit 130, and add-on components 140, and controls the overall operation of the wireless device. For example, control unit 120 may control the electrical / mechanical operation of the wireless device based on programs / code / commands / information stored in memory unit 130. Control unit 120 may transmit information stored in memory unit 130 to an external source (e.g., other communication devices) via communication unit 110 through a wireless / wired interface, or store information received from an external source (e.g., other communication devices) via communication unit 110 in memory unit 130 via a wireless / wired interface.

[0234] The additional component 140 can be configured differently depending on the type of wireless device. For example, the additional component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device can be configured according to (but is not limited to) a robot ( Figure 12 100a), vehicles ( Figure 12 100b-1 and 100b-2), XR device ( Figure 12 100c), handheld device ( Figure 12 100d), home appliances ( Figure 12 100e), IoT devices ( Figure 12 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environment devices, AI servers / devices ( Figure 12 400), BS ( Figure 12 This can be achieved through 200 network nodes, etc. Wireless devices can be used in mobile or fixed locations depending on the use case / service.

[0235] exist Figure 14In wireless devices 100 and 200, all elements, components, units / parts, and / or modules may be interconnected via wired interfaces, or at least a portion thereof may be wirelessly connected via communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 may be wired connected, and control unit 120 and first units (e.g., 130 and 140) may be wirelessly connected via communication unit 110. The various elements, components, units / parts, and / or modules within wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be configured as a collection of one or more processors. As an example, control unit 120 may be configured as a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. As another example, memory unit 130 may be configured as random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), flash memory, volatile memory, non-volatile memory, and / or combinations thereof.

[0236] Figure 15 The illustration shows a vehicle or autonomous vehicle applicable to this disclosure. The vehicle or autonomous vehicle may be a mobile robot, car, train, manned / unmanned aerial vehicle (AV), vessel, etc.

[0237] Reference Figure 15 The vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to... Figure 14 Blocks 110 / 130 / 140.

[0238] Communication unit 110 can send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. Control unit 120 can perform various operations by controlling the components of the vehicle or autonomous vehicle 100. Control unit 120 may include an electronic control unit (ECU). Drive unit 140a enables the vehicle or autonomous vehicle 100 to move on a road. Drive unit 140a may include an engine, motor, powertrain, wheels, brakes, steering mechanism, etc. Power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuitry, battery, etc. Sensor unit 140c can acquire vehicle status, surrounding environment information, user information, etc. Sensor unit 140c may include inertial measurement unit (IMU) sensors, collision sensors, wheel sensors, speed sensors, slope sensors, weight sensors, heading sensors, position modules, vehicle forward / reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, depth sensors, ultrasonic sensors, lighting sensors, pedal position sensors, etc. Autonomous driving unit 140d can implement technologies for maintaining the vehicle within its lane, technologies for automatically adjusting speed (e.g., adaptive cruise control), technologies for autonomously driving along a determined path, and technologies for automatically setting a route if a destination is set, etc.

[0239] For example, communication unit 110 can receive map data, traffic information data, etc., from an external server. Autonomous driving unit 140d can generate an autonomous driving path and driving plan from the acquired data. Control unit 120 can control drive unit 140a, enabling the vehicle or autonomous vehicle 100 to move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, communication unit 110 can periodically or non-periodically acquire recent traffic information data from an external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, sensor unit 140c can acquire vehicle status and / or surrounding environment information. Autonomous driving unit 140d can update the autonomous driving path and driving plan based on newly acquired data / information. Communication unit 110 can transmit information about vehicle location, autonomous driving path, and / or driving plan to an external server. The external server can predict traffic information data using AI technology, etc., based on information collected from the vehicle or autonomous vehicle, and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0240] The above embodiments correspond to combinations of the elements and features of this disclosure in a prescribed form. Furthermore, unless explicitly stated otherwise, each element or feature may be considered optional. Each element or feature may be implemented without combination with other elements or features. Moreover, embodiments of this disclosure can be implemented by partially combining elements and / or features together. The order of operations described for various embodiments of this disclosure may be modified. Some configurations or features of one embodiment may be included in another embodiment, or may replace corresponding configurations or features of another embodiment. Furthermore, it will be readily understood that embodiments are configured by combining claims not explicitly referenced in the appended claims, or may be included as new claims after filing the application.

[0241] Those skilled in the art will understand that this disclosure may be practiced in other specific forms besides those set forth herein without departing from the spirit and essential characteristics of this disclosure. Therefore, the above embodiments should be construed in all respects as illustrative rather than restrictive. The scope of this disclosure should be determined by the appended claims and their legal equivalents, and not by the foregoing description, and all changes falling within the meaning and scope of the appended claims are intended to be covered therewith.

[0242] Industrial applicability

[0243] This disclosure applies to UE, BS or other devices in wireless mobile communication systems.

Claims

1. A method for transmitting signals by a user equipment (UE) in a wireless communication system, the method comprising the following steps: Receive downlink control information (DCI) for uplink scheduling; as well as Based on the DCI, the Physical Uplink Shared Channel (PUSCH) with Channel State Information (CSI) is transmitted. Wherein, the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple codewords (CWs), the CSI is multiplexed on the CW with the highest modulation and coding scheme (MCS) among the multiple CWs, and Specifically, the UE does not expect the uplink shared channel UL-SCH indicator field in the DCI to be set to a first value so as not to perform UL-SCH transmission.

2. The method according to claim 1, wherein, Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH comprising the plurality of CWs, all of the plurality of CWs respectively comprising UL-SCH.

3. The method according to claim 1, wherein, Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, no CW is configured to include only the CSI.

4. The method according to claim 1, wherein, The DCI includes the UL-SCH indicator field, and Wherein, based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, the UE assumes that the UL-SCH indicator field is set to a second value to perform the UL-SCH transmission.

5. The method according to claim 1, wherein, Based on the fact that the rank of the PUSCH transmission is greater than 4 and the PUSCH includes the plurality of CWs, the UE assumes that the size of the UL-SCH indicator field is 0 bits.

6. The method according to claim 1, wherein, The CSI and the first UL-SCH are multiplexed on the CW having the highest MCS, and The second UL-SCH is reused on another CW without the CSI.

7. The method according to claim 1, wherein, Based on the fact that the rank of the PUSCH transmission is greater than 4 and the PUSCH includes the plurality of CWs, the UL-SCH indicator field is configured to provide information other than information about whether the UL-SCH transmission was performed.

8. The method according to claim 1, wherein, The size of the UL-SCH indicator field in the DCI is determined based on the rank of the PUSCH transmission.

9. The method according to claim 1, wherein, The DCI includes a CSI request field that is set to a non-zero value.

10. A computer-readable recording medium having a program recorded thereon for performing the method according to claim 1.

11. An apparatus for wireless communication, the apparatus comprising: Memory configured to store instructions; as well as A processor configured to perform operations by executing the instructions. The operations of the processor include: Receive downlink control information (DCI) for uplink scheduling; and Based on the DCI, the Physical Uplink Shared Channel (PUSCH) with Channel State Information (CSI) is transmitted. Wherein, the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple codewords (CWs), the CSI is multiplexed on the CW with the highest modulation and coding scheme (MCS) among the multiple CWs, and Specifically, the device does not expect the uplink shared channel UL-SCH indicator field in the DCI to be set to a first value so that UL-SCH transmission is not performed.

12. The device of claim 11, further comprising a transceiver. in, The device is a user equipment (UE) operating in a wireless communication system.

13. The device according to claim 11, wherein, This device is a processing apparatus configured to control user equipment (UE) operating in a wireless communication system.

14. A method for receiving signals by a base station (BS) in a wireless communication system, the method comprising the following steps: Send downlink control information (DCI) for uplink scheduling; as well as The Physical Uplink Shared Channel (PUSCH) is multiplexed with Channel State Information (CSI) based on the DCI reception. Wherein, the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple codewords (CWs), the BS sets the uplink shared channel UL-SCH indicator field in the DCI to a second value to perform UL-SCH scheduling on all the multiple CWs, and obtains the CSI from the CW with the highest modulation and coding scheme (MCS) among the multiple CWs.

15. A base station (BS) for wireless communication, the BS comprising: Memory configured to store instructions; as well as A processor configured to perform operations by executing the instructions. The operations of the processor include: Sending downlink control information (DCI) for uplink scheduling; and The Physical Uplink Shared Channel (PUSCH) is multiplexed with Channel State Information (CSI) based on the DCI reception. Wherein, the rank of the PUSCH transmission is greater than 4 and the PUSCH includes multiple codewords (CWs), the BS sets the uplink shared channel UL-SCH indicator field in the DCI to a second value to perform UL-SCH scheduling on all the multiple CWs, and obtains the CSI from the CW with the highest modulation and coding scheme (MCS) among the multiple CWs.

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