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) on the basis of the DCI, in which the transmission based on the PUSCH relates to 8 transmission ports and includes a plurality of codewords (CWs), first uplink control information (UCI) is multiplexed on one CW among the plurality of CWs, the one CW on which the first UCI is multiplexed has a highest modulation and coding scheme (MCS) value among the plurality of CWs, the highest MCS value is 2 or more based on the number of CWs, and the first UCI is multiplexed on the CW. Thus, among the CWs having the highest MCS value, the CW having the lowest CW index may be determined as one CW on which the first UCI is multiplexed.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and an apparatus for transmitting or receiving a downlink / uplink radio signal in a wireless communication system. Background Art

[0002] Generally, wireless communication systems are evolving to cover different wide ranges to provide communication services such as audio communication services, data communication services, etc. Wireless communication is a multi-access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). For example, the multi-access system may be any one of a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency division multiple access (SC-FDMA) system. Summary of the Invention

[0003] Technical Problem

[0004] An object of the present disclosure is to provide a method and an apparatus for efficiently performing a wireless signal transmission / reception process.

[0005] Those skilled in the art will understand that the objects achievable by the present disclosure are not limited to those specifically described above, and the above and other objects achievable by the present disclosure will be more clearly understood from the following detailed description.

[0006] Technical Solution

[0007] In one aspect, a method for a terminal to transmit a signal in a wireless communication system is provided herein. The method may include the following steps: receiving downlink control information (DCI) for uplink scheduling; and transmitting a physical uplink shared channel (PUSCH) based on the DCI. The transmission based on the PUSCH is related to 8 transmission ports and includes a plurality of codewords (CWs), and a first uplink control information (UCI) may be multiplexed into one of the CWs. One of the CWs into which the first UCI is multiplexed may have the highest modulation and coding scheme (MCS) value among the CWs. Based on the number of CWs having the highest MCS value being greater than or equal to 2, the CW having the lowest CW index among the CWs having the highest MCS value may be determined as one of the CWs into which the first UCI is multiplexed.

[0008] The CW may include a first CW having a first index and a second CW having a second index higher than the first index. Based on the first CW and the second CW having the same MCS value, the first UCI may be multiplexed only into the first CW.

[0009] The first UCI may include Hybrid Automatic Repeat reQuest - ACK (HARQ - ACK), Channel State Information (CSI) part 1, and CSI part 2.

[0010] A second UCI different from the first UCI may be multiplexed to all CWs.

[0011] In one example, the second UCI may include Hybrid Automatic Repeat reQuest - ACK (HARQ - ACK). The HARQ - ACK may be repeatedly mapped on multiple CWs.

[0012] In one example, a second UCI different from the first UCI may be multiplexed to all CWs. The second UCI may include Channel State Information (CSI). The CSI may be mapped once on multiple CWs.

[0013] Based on the first UCI having a first priority value lower than a second priority value, the first UCI may be multiplexed to only one determined CW.

[0014] A second UCI having a second priority value higher than the first priority value may be multiplexed to all CWs.

[0015] When the rank value is greater than 4, the CW may be enabled.

[0016] Higher - layer parameters for determining the number of UCI resource elements (REs) may be configured for each CW. The higher - layer parameters may include at least one of an α parameter for rate matching or a β offset parameter.

[0017] On the other hand, a processor - readable recording medium may be provided that stores a program for executing the signal transmission method disclosed above.

[0018] On the other hand, a terminal for executing the signal transmission disclosed above may be provided.

[0019] On the other hand, a processing device for controlling a terminal to execute the above - mentioned signal transmission may be provided.

[0020] On the other hand, this document provides a method for a base station to receive signals in a wireless communication system. The method may include the following steps: transmitting downlink control information (DCI) for uplink scheduling; and receiving a physical uplink shared channel (PUSCH) based on the DCI. The reception of the PUSCH is related to 8 transmission ports and includes multiple codewords (CWs), and a first uplink control information (UCI) can be demultiplexed from one of the CWs. A CW from which the first UCI is demultiplexed may have the highest modulation and coding scheme (MCS) value among the CWs. Based on the number of CWs having the highest MCS value being greater than or equal to 2, the CW having the lowest CW index among the CWs having the highest MCS value may be determined as a CW from which the first UCI is demultiplexed.

[0021] On the other hand, a base station for performing the above signal reception method may be provided.

[0022] Beneficial effects

[0023] According to the present disclosure, wireless signal transmission and reception can be efficiently performed in a wireless communication system.

[0024] Those skilled in the art will understand that the effects that can be achieved using the present disclosure are not limited to those specifically described above, and other advantages of the present disclosure will be more clearly understood from the following detailed description in conjunction with the accompanying drawings. Description of the drawings

[0025] Figure 1 Illustrates the physical channels used in a 3rd Generation Partnership Project (3GPP) system as an exemplary wireless communication system and the general signal transmission method using the same.

[0026] Figure 2 Illustrates the radio frame structure.

[0027] Figure 3 Illustrates the resource grid of a time slot.

[0028] Figure 4 Illustrates an exemplary mapping of physical channels in a time slot.

[0029] Figure 5 Illustrates an exemplary physical downlink shared channel (PDSCH) and acknowledgement / negative acknowledgement (ACK / NACK) transmission process.

[0030] Figure 6 Illustrates an exemplary physical uplink shared channel (PUSCH) transmission process.

[0031] Figure 7 Illustrates an example of a channel state information (CSI) related process.

[0032] Figure 8 Illustrates multi-TRP transmission.

[0033] Figure 9 Shows the method of mapping UCI to PUSCH in the existing NR standard.

[0034] Figures 10 to 14 Shows the proposed method of mapping UCI to PUSCH according to the present disclosure.

[0035] Figure 15 Shows an example implementation of a method for operating a UE in a wireless communication system according to an embodiment of the present disclosure.

[0036] Figure 16 Shows an example implementation of a method for operating a BS in a wireless communication system according to an embodiment of the present disclosure.

[0037] Figures 17 to 20 Shows a communication system 1 and a wireless device applicable to the present disclosure.

[0038] Figure 21 Shows discontinuous reception (DRX) operation applicable to the present disclosure. Detailed implementation

[0039] Embodiments of the present disclosure 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 a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as global system for mobile communications (GSM) / general packet radio service (GPRS) / enhanced data rates for GSM evolution (EDGE). OFDMA can be implemented as a radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (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 the evolved UMTS (E-UMTS) using E-UTRA, and LTE-Advanced (A) is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A.

[0040] As more and more communication devices require greater communication capacity, enhanced mobile broadband communication is needed relative to traditional radio access technologies (RATs). Additionally, massive machine-type communication (MTC), which can provide various services anytime and anywhere by connecting multiple devices and objects, is another important issue to be considered in next-generation communication. The design of communication systems for services / UEs that are sensitive to reliability and latency is also being discussed. Therefore, the introduction of a new radio access technology that takes into account enhanced mobile broadband communication (eMBB), massive MTC, and ultra-reliable low-latency communication (URLLC) is being discussed. In the present disclosure, for simplicity, this technology will be referred to as NR (New Radio or New RAT).

[0041] For the sake of simplicity, 3GPP NR is mainly described, but the technical concept of the present disclosure is not limited thereto.

[0042] In the present disclosure, the term "set" may be replaced by "configured", and the two may be used interchangeably. In addition, conditional expressions (e.g., "if", "in the case of", or "when") may be replaced by "based on" or "in a state where". Additionally, the operations or software / hardware (SW / HW) configurations of a user equipment (UE) / base station (BS) may be derived / understood based on satisfying the corresponding conditions. When the processing on the receiving (or transmitting) side can be derived / understood from the processing on the transmitting (or receiving) side during 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 may be understood as signal monitoring / reception / decoding / determination on the receiving side. Furthermore, when it is said that a UE performs (or does not perform) a specific operation, this may also be interpreted as the BS expecting / assuming (or not expecting / assuming) the UE to perform that specific operation. When it is said that a BS performs (or does not perform) a specific operation, this may 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, embodiments, examples, options, methods, solutions, etc. are distinguished and indexed from each other, which 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 to each other, at least some sections, embodiments, examples, options, methods, solutions, etc. may be implemented in combination or omitted.

[0043] In a wireless communication system, a user equipment (UE) receives information from a base station (BS) via the downlink (DL) and transmits information to the BS via the uplink (UL). The information transmitted and received by the BS and the UE includes data and various control information, and includes various physical channels according to the type / use of the information transmitted and received by the UE and the BS.

[0044] Figure 1Shows the physical channels used in the 3GPP NR system and the general signaling method using them.

[0045] When the UE powers on again from the powered-off state or enters a new cell, in step S101, the UE performs an initial cell search process (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 process to monitor the DL channel state.

[0046] After the initial cell search, in step S102, the UE can obtain more specific system information by receiving a Physical Downlink Control Channel (PDCCH) and receiving a Physical Downlink Shared Channel (PDSCH) based on the information of the PDCCH.

[0047] In steps S103 to S106, the UE can perform a random access process to access the BS. For random access, the UE can send a preamble on the Physical Random Access Channel (PRACH) to the BS (S103) and receive a response message to the preamble on the PDCCH and the PDSCH corresponding to the PDCCH (S104). In the case of contention-based random access, the UE can perform a contention resolution process by further sending a PRACH (S105) and receiving the PDCCH and the PDSCH corresponding to the PDCCH (S106).

[0048] After the foregoing process, the UE can receive the PDCCH / PDSCH (S107) and send a Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) (S108), as a general downlink / uplink signaling process. The control information sent from the UE to the BS is called Uplink Control Information (UCI). UCI includes Hybrid Automatic Repeat reQuest Acknowledgment / Negative 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 sent on the PUCCH, when it is necessary to send control information and traffic data simultaneously, UCI can be sent on the PUSCH. In addition, UCI can be sent non-periodically on the PUSCH according to the request / command of the network.

[0049] Figure 2The radio frame structure is shown. In NR, uplink transmission and downlink transmission are configured with frames. Each radio frame has a length of 10 ms and is divided into two 5 - ms half - frames (HF). Each half - frame is divided into five 1 - ms sub - frames (SF). A sub - frame is divided into one or more time slots, and the number of time slots in a sub - frame depends on the sub - carrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 orthogonal frequency - division multiplexing (OFDM) symbols. When using normal CP, each time slot includes 14 OFDM symbols. When using extended CP, each time slot includes 12 OFDM symbols.

[0050] Table 1 exemplarily shows that when using normal CP, the number of symbols per time slot, the number of time slots per frame, and the number of time slots per sub - frame vary according to the SCS.

[0051] [Table 1]

[0052] SCS(15*2^u) <![CDATA[N slot symb > <![CDATA[N frame,u slot > <![CDATA[N subframe,u slot > 15KHz (u = 0) 14 10 1 30KHz (u = 1) 14 20 2 60KHz (u = 2) 14 40 4 120KHz (u = 3) 14 80 8 240KHz (u = 4) 14 160 16

[0053] *N slot symb : Number of symbols in a time slot

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

[0055] *N subframe,u slot : Number of time slots in a sub - frame

[0056] Table 2 shows that when using extended CP, the number of symbols per time slot, the number of time slots per frame, and the number of time slots per sub - frame vary according to the SCS.

[0057] [Table 2]

[0058] SCS(15*2^u) <![CDATA[N slot symb > <![CDATA[N frame,u slot > <![CDATA[N subframe,u slot > 60KHz (u = 2) 12 40 4

[0059] The structure of the frame is only an example. The number of sub - frames, time slots, and symbols in a frame can vary.

[0060] In the NR system, OFDM parameter sets (e.g., SCS) can be configured differently for multiple cells aggregated for one UE. Therefore, the (absolute - time) duration of a time resource (e.g., SF, time slot, or TTI) composed of the same number of symbols (referred to as a time unit (TU) for simplicity) 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 - spread - OFDM (DFT - s - OFDM) symbols).

[0061] Figure 3The resource grid showing the time slot is presented. The time slot includes a plurality of symbols in the time domain. For example, when using normal CP, the time slot includes 14 symbols. However, when using extended CP, the time slot includes 12 symbols. The carrier includes a plurality of subcarriers in the frequency domain. A resource block (RB) is defined as a plurality of consecutive subcarriers in the frequency domain (e.g., 12 consecutive subcarriers). A bandwidth part (BWP) can be defined as a plurality of consecutive physical resource blocks (PRBs) in the frequency domain and corresponds to a single parameter set (e.g., SCS, CP length, etc.). The carrier can include up to N (e.g., five) BWPs. Data communication can be performed through the enabled BWP, and only one BWP can be enabled for one UE. In the resource grid, each element is called a resource element (RE), and one complex symbol can be mapped to each RE.

[0062] Figure 4 An exemplary mapping of the physical channels in the time slot is shown. The PDCCH can be transmitted in the DL control region, and the PDSCH can be transmitted in the DL data region. The PUCCH can be transmitted in the UL control region, and the PUSCH can be transmitted in the UL data region. The guard period (GP) provides a time gap for the switching of the transmission mode to the reception mode or the reception mode to the transmission mode at the BS and the UE. Some symbols in the subframe at the DL to UL handover can be configured as the GP.

[0063] Each physical channel will be described in more detail below.

[0064] The PDCCH transmits DCI. For example, the PDCCH (i.e., DCI) can carry information on the transmission format and resource allocation of the DL shared channel (DL-SCH), resource allocation information of the uplink shared channel (UL-SCH), paging information on the paging channel (PCH), system information on the DL-SCH, information on the resource allocation of the high-layer control message (e.g., RAR sent on the PDSCH), transmit power control commands, information on the enabling / release of the configured scheduling, etc. The DCI includes a cyclic redundancy check (CRC). The CRC is masked using various identifiers (IDs) (e.g., radio network temporary identifier (RNTI)) according to the owner or use of the PDCCH. For example, if the PDCCH is for a specific UE, the CRC is masked by the UE ID (e.g., cell-RNTI (C-RNTI)). If the PDCCH is for a paging message, the CRC is masked by the paging-RNTI (P-RNTI). If the PDCCH is for system information (e.g., system information block (SIB)), the CRC is masked by the system information RNTI (SI-RNTI). When the PDCCH is for RAR, the CRC is masked by the random access-RNTI (RA-RNTI).

[0065] The PDCCH includes 1, 2, 4, 8, or 16 control channel elements (CCEs) according to its aggregation level (AL). A CCE is a logical allocation unit that provides a specific code rate to the PDCCH according to the radio channel state. A CCE includes 6 resource element groups (REGs), and each REG is 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 parameter set (e.g., SCS, CP length, etc.). Multiple CORESETs for one UE can overlap with each other in the time domain / 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 the number of symbols (up to 3) in a CORESET can be configured by higher layer signaling.

[0066] For PDCCH reception / detection, the UE monitors PDCCH candidates. A PDCCH candidate is a CCE that the UE should monitor to detect the PDCCH. Each PDCCH candidate is defined as 1, 2, 4, 8, or 16 CCEs according to the 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 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. The SS can be defined based on the following parameters.

[0067] - controlResourceSetId: The CORESET related to the SS.

[0068] - monitoringSlotPeriodicityAndOffset: The PDCCH monitoring periodicity (time slot) and the PDCCH monitoring offset (time slot).

[0069] - monitoringSymbolsWithinSlot: The PDCCH monitoring symbols in a time slot (e.g., the first symbol of the CORESET).

[0070] - nrofCandidates: The number of PDCCH candidates for each AL = {1, 2, 4, 8, 16} (one of 0, 1, 2, 3, 4, 5, 6, and 8).

[0071] The occasion (e.g., time / frequency resource) for the UE to monitor PDCCH candidates is defined as the PDCCH (monitoring) occasion. One or more PDCCH (monitoring) occasions can be configured in a time slot.

[0072] Table 3 shows the characteristics of each SS.

[0073] [Table 3]

[0074]

[0075] Table 4 shows the DCI formats transmitted on the PDCCH.

[0076] [Table 4]

[0077]

[0078] DCI format 0_0 can be used to schedule TB (or TB-level) based PUSCH, and DCI format 0_1 can be used to schedule TB (or TB-level) based PUSCH or code block group (CBG) (or CBG-level) based PUSCH. DCI format 1_0 can be used to schedule TB (or TB-level) based PDSCH, and DCI format 1_1 can be used to schedule TB (or TB-level) based PDSCH or CBG (or CBG-level) based PDSCH (or DL grant DCI). DCI formats 0_0 / 0_1 can be referred to as UL grant DCI or UL scheduling information, and DCI formats 1_0 / 1_1 can be referred to as DL grant DCI or DL scheduling information. DCI format 2_0 is used to transmit dynamic time slot format information (e.g., dynamic time slot format indicator (SFI)) to the UE, and DCI format 2_1 is used to transmit DL preemption information to the UE. DCI format 2_0 and / or DCI format 2_1 can be transmitted to a corresponding group of UEs on the group common PDCCH (PDCCH directed to a group of UEs).

[0079] 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. Under the fallback DCI format, the DCI size / field configuration remains the same regardless of the UE configuration. In contrast, under the non-fallback DCI format, the DCI size / field configuration varies according to the UE configuration.

[0080] The PDSCH transmits DL data (e.g., DL shared channel transport block (DL-SCH TB)) and uses modulation schemes such as quadrature phase shift keying (QPSK), 16-quadrature amplitude modulation (16QAM), 64QAM, or 256QAM. The TB is encoded into codewords. The PDSCH can transmit up to two codewords. Scrambling and modulation mapping can be performed on a per-codeword basis, and the modulation symbols generated from each codeword can be mapped to one or more layers. Each layer is mapped to resources together with the demodulation reference signal (DMRS), and the OFDM symbol signal generated from the layer mapped with DMRS is sent through the corresponding antenna port.

[0081] The PUCCH transmits uplink control information (UCI). The UCI includes the following information.

[0082] - SR (scheduling request): Information for requesting UL-SCH resources.

[0083] - HARQ (hybrid automatic repeat request)-ACK (acknowledgment): Response to DL data packets (e.g., codewords) on the PDSCH. The HARQ-ACK indicates whether the DL data packet has been successfully received. In response to a single codeword, 1-bit HARQ-ACK can be sent. In response to two codewords, 2-bit HARQ-ACK can be sent. The HARQ-ACK response includes positive ACK (simply referred to as ACK), negative ACK (NACK), discontinuous transmission (DTX), or NACK / DTX. The term HARQ-ACK can be used interchangeably with HARQ ACK / NACK and ACK / NACK.

[0084] - CSI (channel state information): Feedback information of the DL channel. The multiple-input multiple-output (MIMO)-related feedback information includes RI and PMI.

[0085] Table 5 shows exemplary PUCCH formats. Based on the PUCCH transmission duration, the PUCCH formats can be divided into short PUCCH (formats 0 and 2) and long PUCCH (formats 1, 3, and 4).

[0086] [Table 5]

[0087]

[0088] 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 sending one of multiple sequences on the PUCCH of PUCCH format 0. The UE only sends the PUCCH of PUCCH format 0 in the PUCCH resource configured for the corresponding SR when the UE sends a positive SR.

[0089] PUCCH format 1 transmits UCI of up to 2 bits, and the modulation symbols of UCI are spread in the time domain with an orthogonal cover code (OCC) (configured differently depending on whether frequency hopping is performed). The DMRS is transmitted in the symbols where no modulation symbols are sent (i.e., transmitted in time division multiplexing (TDM)).

[0090] PUCCH format 2 transmits UCI of more than 2 bits, and the modulation symbols of DCI are transmitted in frequency division multiplexing (FDM) with the DMRS. The DMRS is located at symbol #1, #4, #7, and #10 of a given RB with a density of 1 / 3. A pseudo-noise (PN) sequence is used for the DMRS sequence. For the 2-symbol PUCCH format 2, frequency hopping can be enabled.

[0091] PUCCH format 3 does not support UE multiplexing in the same PRBS and transmits UCI of more than 2 bits. In other words, the PUCCH resources of PUCCH format 3 do not include OCC. The modulation symbols are transmitted in TDM with the DMRS.

[0092] PUCCH format 4 supports multiplexing of up to 4 UEs in the same PRBS and transmits UCI of more than 2 bits. In other words, the PUCCH resources of PUCCH format 3 include OCC. The modulation symbols are transmitted in TDM with the DMRS.

[0093] At least one of the one or two or more cells configured for a UE can be configured for PUCCH transmission. At least the primary cell can be set as the cell for PUCCH transmission. Based on 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. The PUCCH cell group can be abbreviated as the PUCCH group. PUCCH transmission can be configured not only in the primary cell but also in the secondary cell (Scell). The primary cell belongs to the primary PUCCH group, and the PUCCH-SCell configured for PUCCH transmission belongs to the secondary PUCCH group. For the cells belonging to the primary PUCCH group, the PUCCH on the primary cell can be used. For the cells belonging to the secondary PUCCH group, the PUCCH on the PUCCH-SCell can be used.

[0094] The PUSCH transmits UL data (e.g., UL shared channel transport block (UL-SCH TB)) and / or UCI based on the CP-OFDM waveform or the DFT-s-OFDM waveform. When the PUSCH is sent in the DFT-s-OFDM waveform, the UE transmits the PUSCH through transform precoding. For example, when transform precoding is not possible (e.g., disabled), the UE can transmit the PUSCH in the CP-OFDM waveform, and when transform precoding is possible (e.g., enabled), the UE can transmit the PUSCH in the CP-OFDM or DFT-s-OFDM waveform. The PUSCH transmission can be dynamically scheduled by the UL grant in the DCI, or semi-statically scheduled by higher layer (e.g., RRC) signaling (and / or layer 1 (L1) signaling such as PDCCH) (configured scheduling or configured grant). The PUSCH transmission can be performed in a codebook-based or non-codebook-based manner.

[0095] Figure 5 Shows an exemplary ACK / NACK transmission process. Referring 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 with the PDSCH offset K0 and the PDSCH to HARQ-ACK report offset K1. For example, DCI format 1_0 and DCI format 1_1 may include the following information.

[0096] - Frequency domain resource assignment: Indicates the set of RBs assigned to the PDSCH.

[0097] - Time domain resource assignment: Indicates K0 and the start position (e.g., OFDM symbol index) and length (e.g., number of OFDM symbols) of the PDSCH in the slot.

[0098] - PDSCH-to-HARQ_feedback timing indicator: Indicates K1.

[0099] - HARQ process number (4 bits): Indicates the HARQ process ID of the data (e.g., PDSCH or TB).

[0100] - PUCCH resource indicator (PRI): Indicates the PUCCH resource to be used for UCI transmission among multiple PUCCH resources in the PUCCH resource set.

[0101] After receiving the PDSCH in slot #(n + K0) according to the scheduling information of slot #n, the UE can send the UCI on the PUCCH in slot #(n + K1). The UCI can include the HARQ-ACK response to the PDSCH. For convenience, Figure 5Based on the assumption that the SCS of the PDSCH is equal to the SCS of the PUCCH and time slot #n1 = time slot #(n + K0), this should not be construed as limiting the present disclosure. When the SCSs are different, K1 may be indicated / interpreted based on the SCS of the PUCCH.

[0102] In the case where the PDSCH is configured to carry at most one TB, the HARQ-ACK response may be configured in one bit. In the case where the PDSCH is configured to carry at most two TBs, if spatial bundling is not configured, the HARQ-ACK response may be configured in two bits, and if spatial bundling is configured, the HARQ-ACK response may be configured in one bit. When time slot #(n + K1) is designated as the HARQ-ACK transmission timing for multiple PDSCHs, the UCI transmitted in time slot #(n + K1) includes the HARQ-ACK responses for the multiple PDSCHs.

[0103] It may be configured (e.g., via RRC / higher layer signaling) for each cell group whether the UE should perform spatial bundling for HARQ-ACK responses. For example, spatial bundling may be configured for each individual HARQ-ACK response transmitted on the PUCCH and / or the HARQ-ACK response transmitted on the PUSCH.

[0104] When up to two (or two or more) TBs (or codewords) (which may or may not be scheduled by one DCI) can be received at a time in the corresponding serving cell (e.g., when the higher layer parameter maxNrofCodeWordsScheduledByDCI indicates 2 TBs), spatial bundling may be supported. More than four layers may be used for 2 TB transmissions, and at most four layers may be used for 1 TB transmissions. As a result, when spatial bundling is configured for the corresponding cell group, spatial bundling may be performed for the serving cells in the cell group that can be scheduled with more than four layers. A UE that wants to transmit the HARQ-ACK response through spatial bundling may generate the HARQ-ACK response by performing a (bitwise) logical AND operation on the A / N bits of multiple TBs.

[0105] For example, assuming that the UE receives a DCI scheduling two TBs and receives two TBs on the PDSCH based on the DCI, the UE performing spatial bundling may 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.

[0106] For example, when only one TB is actually scheduled in a serving cell configured to receive two TBs, the UE may generate a single A / N bit by performing a logical AND operation on the A / N bit of one TB and the bit value 1. As a result, the UE reports the A / N bit of one TB to the BS.

[0107] There are multiple parallel DL HARQ processes for DL transmission at the BS / UE. While the BS waits for HARQ feedback indicating the success or failure of the reception of a previous DL transmission, the 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 quantities such as the number of MAC protocol data unit (PDU) transmissions, HARQ feedback for the MAC PDUs in the buffer, and state variables for the current redundancy version. Each HARQ process is identified by a HARQ process ID.

[0108] Figure 6 Illustrates an exemplary PUSCH transmission procedure. Refer to Figure 6 , the UE may detect the PDCCH in 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.

[0109] - Frequency domain resource assignment: Indicates the set of RBs assigned to the PUSCH.

[0110] - 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 in the slot. The start symbol and length of the PUSCH may be indicated by a start and length indicator value (SLIV) or indicated separately.

[0111] Then, the UE may transmit the PUSCH in slot #(n + K2) according to the scheduling information in slot #n. The PUSCH includes a UL-SCH TB.

[0112] CSI-related operations

[0113] Figure 7 Illustrates an example of a CSI-related procedure.

[0114] The UE receives CSI-related configuration information (710) from the BS via RRC signaling. The CSI-related configuration information may include at least one of 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.

[0115] - CSI-IM resources can be configured for interference measurement (IM) of the UE. In the time domain, the CSI-IM resource set can be configured to be periodic, semi-persistent, or aperiodic. The CSI-IM resource can be configured as zero-power (ZP)-CSI-RS of the UE. The ZP-CSI-RS can be configured to be distinguishable from non-zero-power (NZP)-CSI-RS.

[0116] - The UE can assume that the CSI-RS resources for channel measurement and the CSI-IM / NZP CSI-RS resources for interference measurement configured for a CSI report have a QCL relationship with respect to "QCL-TypeD" of each resource (when the NZP CSI-RS resource is used for interference measurement).

[0117] - The CSI resource configuration can include at least one of the CSI-IM resource for interference measurement, the NZP CSI-RS resource for interference measurement, and the NZP CSI-RS resource for channel measurement. The channel measurement resource (CMR) can be the NZP CSI-RS for CSI acquisition, and the interference measurement resource (IMR) can be the NZP CSI-RS for CSI-IM and IM.

[0118] - 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. The CSI-RS can support up to 32 antenna ports. The CSI-RS corresponding to N (N is 1 or greater) antenna ports can be mapped to N RE positions within the time-frequency unit corresponding to one time slot and one RB. When N is 2 or greater, the N-port CSI-RS can be multiplexed by CDM, FDM, and / or TDM methods. The CSI-RS can be mapped to the remaining REs other than the REs where CORESET, DMRS, and SSB are mapped. In the frequency domain, the CSI-RS can be configured for the entire bandwidth, a partial bandwidth part (BWP), or a partial bandwidth. The CSI-RS can be transmitted in each RB within the bandwidth where the CSI-RS is configured (i.e., density = 1), or the CSI-RS can be transmitted in every second RB (e.g., even or odd RB) (i.e., density = 1 / 2). When the CSI-RS is used as a tracking reference signal (TRS), the single-port CSI-RS can be mapped to 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 can include one or more CSI-RS configurations. Each CSI-RS resource set can be configured to be periodic, semi-persistent, or aperiodic.

[0119] -The CSI report configuration may include configurations such as feedback type, measurement resources, and report type. The NZP-CSI-RS resource set can be used for the CSI report configuration of the corresponding UE. The NZP-CSI-RS resource set can be associated with CSI-RS or SSB. Multiple periodic NZP-CSI-RS resource sets can be configured as TRS resource sets. (i) The feedback type includes 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 signal received power (RSRP), etc. (ii) The measurement resources may include the configuration of downlink signals and / or downlink resources for which the UE performs measurements to determine feedback information. The measurement resources can be configured as ZP and / or NZP CSI-RS resource sets associated with the CSI report configuration. The NZP CSI-RS resource set can include a CSI-RS set or an SSB set. For example, L1-RSRP can be measured for the CSI-RS set or the SSB set. (iii) The report type may include the configuration of the time when the UE performs reporting and the uplink channel. The 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 enable / disable. Aperiodic CSI reports can be indicated by DCI signaling. For example, the CSI request field of the uplink grant can indicate one of various report trigger sizes. Aperiodic CSI reports can be sent on the PUSCH.

[0120] The UE measures CSI based on configuration information related to CSI. The CSI measurement may include receiving CSI-RS (720) and obtaining CSI (730) by calculating the received CSI-RS.

[0121] The UE can send a CSI report (740) to the BS. For the CSI report, the time resources and frequency resources available for the UE are controlled by the BS. The channel state information (CSI) includes at least one of 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.

[0122] The time-domain behavior of CSI reports supports periodicity, semi-persistence, and aperiodicity. i) Periodic CSI reports are performed in short PUCCH and long PUCCH. The periodicity and slot offset of periodic CSI reports can be configured by RRC and refer to the CSI-ReportConfig IE. ii) SP (semi-periodic) CSI reports are performed in short PUCCH, long PUCCH, or PUSCH. For SP CSI in short / long PUCCH, 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 PUSCH, the periodicity of SP CSI reports is configured by RRC, but the slot offset is not configured by RRC and SP CSI reports are enabled / disabled by DCI (format 0_1). For SP CSI reports in PUSCH, a separate RNTI (SP-CSI C-RNTI) is used. The initial CSI report timing follows the PUSCH time-domain allocation value indicated by 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 the SP-CSI trigger state for a specific configuration. SP CSI reports have the same or similar enable / disable mechanism as that with data transmission in SPS PUSCH. iii) Aperiodic CSI reports are performed in PUSCH and triggered by DCI. In this case, information related to the triggering of aperiodic 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 DCI.

[0123] Quasi-co-location (QCL)

[0124] Two antenna ports are quasi-co-located when the channel properties of one antenna port are to be inferred from those of another antenna port. The channel properties may include one or more of delay spread, Doppler spread, frequency / Doppler shift, average received power, receive timing / average delay, and spatial RX parameters.

[0125] A list of multiple TCI state configurations can be configured for the UE via the higher-layer parameter PDSCH-Config. Each TCI state is associated with QCL configuration parameters between one or two DL reference signals and the DM-RS ports of the PDSCH. QCL may include qcl-Type1 of the first DLRS and qcl-Type2 of the second DL RS. The QCL type may correspond to one of the following.

[0126] - “QCL-TypeA”: {Doppler shift, Doppler spread, average delay, delay spread}

[0127] - "QCL-TypeB": {Doppler frequency shift, Doppler spread}

[0128] - "QCL-TypeC": {Doppler frequency shift, average delay}

[0129] - "QCL-TypeD": {Spatial Rx parameter}

[0130] Operations related to multiple transmit and receive points (M-TRP)

[0131] Figure 8 Illustrates multi-TRP (M-TRP) transmission. Refer to Figure 8 (a) of, a group of layers transmitting the same codeword (CW) (or TB) corresponds to different TRPs. Refer to Figure 8 (b) of, different CWs are transmitted by groups of layers of different TRPs. In this case, it can be assumed that the TBs corresponding to CW#1 and CW#2 in the figure 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, it can be regarded as an example of repeated transmission of the same TB. In Figure 8 the case of (b) of, compared with Figure 8 (a) of, there may be a disadvantage that the coding rate corresponding to the TB is higher. However,[[]] Figure 8 (b) of has the advantage that according to the channel environment, the coding rate can be adjusted by indicating different redundancy version (RV) values of the coded bits generated from the same TB, or the modulation order of each CW can be adjusted.

[0132] According to Figure 8 (a) of and Figure 8 (b) of shown methods, the same TB is repeatedly transmitted by different groups of layers. In addition, since each group of layers is transmitted by different TRP / panels, 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 groups of layers are transmitted through DMRS ports belonging to different DMRS code division multiplexing (CDM) groups.

[0133] Although the above M-TRP related content is described based on the SDM method using different layers, it can be extended and applied to the FDM method based on different frequency domain resources (e.g., RB / PRB set) and / or the TDM method based on different time domain resources (e.g., time slot, symbol, sub-symbol, etc.).

[0134] UCI multiplexing for 8Tx UL transmission

[0135] Consider two transport blocks (TBs). An effective UCI multiplexing method is proposed for 8Tx uplink transmission for a UE equipped with multiple antennas and / or multiple panels in an environment such as a new radio access technology (RAT) with multiple antennas / panels.

[0136] According to the recent standardization meetings, 2-CW (codewords) can be supported in 8Tx UL transmission with a rank of 5 or higher, and the CW-to-layer mapping for codebook / non-codebook based transmission can follow the CW-to-layer mapping of DL transmission in Rel.15.

[0137] For an 8Tx UE, up to 8 layers and 2-CW can be supported, and enhanced UCI multiplexing is required to support this. In the following, in 2-CW, the first CW is denoted as CW1 and the second CW is denoted as CW2. The CW index of CW1 can be 0 and the CW index of CW2 can be 1. In the following description, the term CW can be replaced by TB (transport block).

[0138] Figure 9 Shows the UCI mapped onto the PUSCH in the current NR standard.

[0139] Apply the distributed UCI mapping rule within the OFDM symbol by comparing the unmapped UCI REs with the available REs in the OFDM symbol.

[0140] - Map the HARQ-ACK REs to the available REs in a frequency-first manner starting from the first non-DM-RS symbol after the first DMRS symbol.

[0141] - Map the CSI part 1 REs to the available REs in a frequency-first manner starting from the first non-DM-RS symbol.

[0142] - Map the CSI part 2 REs to the available REs in a frequency-first manner starting from the first non-DM-RS symbol.

[0143] Refer to Figure 9 , different from LTE, the HARQ-ACK REs are mapped first, then CSI part 1 and CSI part 2 are mapped in sequence, and then the PUSCH is mapped. If the REs for HARQ-ACK / CSI do not exactly fit within a single symbol, they first fill one symbol and the remaining REs are mapped uniformly in a distributed manner to other symbols. Then, the subsequent UCI is mapped according to the above rules in sequence. When applying this UCI mapping to two CWs, the following UCI mapping rules are proposed.

[0144] Proposal 1

[0145] When 2-CW is supported / transmitted on the uplink, the following UCI mapping rules are proposed.

[0146] Alternative 0) As an extension of the traditional operation, the CSI part 1 / 2 and the HARQ-ACK RE shall be repeatedly mapped to all CW1 (with index 0) and CW2 (with index 1) (i.e., TB1 and TB2).

[0147] Alternative 1) The CSI part 2 shall be mapped only to the first codeword (TB1), and the CSI part 1 and the HARQ-ACK RE shall be repeatedly mapped to all CW1 and CW2 (TB1 and TB2).

[0148] Although the CSI part 2 is described as being mapped to CW1 in Alternative 1, it can be mapped to CW2 or to the CW selected based on Proposal 1-E.

[0149] Alternative 2) The CSI part 2 shall be mapped across CW1 and CW2 (TB1 and TB2) (i.e., no repeated mapping shall be performed), while the CSI part 1 and the HARQ-ACK RE shall be repeatedly mapped to all CW1 and CW2 (TB1 and TB2).

[0150] Alternative 3) The CSI part 1 and the CSI part 2 shall be mapped across CW1 and CW2 (TB1 and TB2) (i.e., no repeated mapping shall be performed), while the HARQ-ACK RE shall be repeatedly mapped to all CW1 and CW2 (TB1 and TB2).

[0151] Figure 10 An example of UCI mapping according to Alternative 1 is shown.

[0152] In Figure 10 , (a) represents CW1 and (b) represents CW2. For Alternative 0, Figure 9 It is repeatedly mapped in all CWs, i.e., UL-SCH1 in CW1 and UL-SCH2 in CW2. In this case, the disadvantage is that there are fewer REs to which the UL data has to be mapped.

[0153] As Figure 10 shown, in the case of Alternative 1, in (a) the CSI part 1 is mapped only to CW1. Since the size of the CSI part 2 is large, repeated mapping to all CWs may be inefficient. Additionally, the CSI part 1 has more important information than the CSI part 2 (the CSI part 1 consists of components that determine the size of the CSI part 2, such as the CRI / RI / CQI of CW1; the CSI part 2 may consist of the PMI, the CQI of CW2, and the LI), which is repeatedly sent to increase the decoding ability. That is, it aims to increase the reliability of the HARQ-ACK and the CSI part 1. Additionally, for the CSI part 2, since the size of the DL type 2 CSI may be very large, it aims to prevent the code rate of the UL data from decreasing.

[0154] Figure 11 Shows an example of UCI mapping according to Option 2.

[0155] Referring to Figure 11 , in Option 2, the HARQ-ACK RE and CSI Part 1 are repeatedly mapped to CW1 and CW2. On the other hand, CSI Part 2 is not repeatedly mapped but is mapped across two CWs. In this case, the repetition of CSI Part 2 can be reduced, so the space for UL-SCH 1 / 2 can be ensured.

[0156] Figure 12 Shows an example of UCI mapping according to Option 3.

[0157] Referring to Figure 12 , in Option 3, only the HARQ-ACK RE is repeatedly mapped to CW1 and CW2. CSI Part 1 / 2 is not repeatedly mapped but is mapped across two CWs (once). In this case, the repetition of CSI Part 1 / 2 can be reduced, so the space for UL-SCH 1 / 2 can be ensured.

[0158] Option 4) CSI Part 1 and CSI Part 2 should only be mapped to a specific CW (e.g., CW1 or CW2 (TB1 or TB2)), and the HARQ-ACK RE should be repeatedly mapped to all CW1 and CW2 (TB1 and TB2). That is, only the HARQ-ACK RE should be multiplexed to two codewords, and CSI Part 1 and CSI Part 2 should only be multiplexed to one CW. One CW should be selected based on Proposal 1-E, and CSI Part 1 and CSI Part 2 should be multiplexed to it.

[0159] Option 4-1) CSI Part 2 should only be mapped to a specific CW (e.g., CW1 or CW2 (TB1 or TB2)), and the HARQ-ACK RE and CSI Part 1 should be repeatedly mapped to all CW1 and CW2 (TB1 and TB2). That is, only the HARQ-ACK RE and CSI Part 1 should be multiplexed to two codewords, and CSI Part 2 should only be multiplexed to one CW. One CW should be selected based on Proposal 1-E, and CSI Part 1 and CSI Part 2 should be multiplexed.

[0160] Figure 13 Shows an example of UCI mapping according to Option 4.

[0161] Referring to Figure 13, in Option 4, only the HARQ-ACK RE is repeatedly multiplexed to CW1 and CW2. The CSI part 1 / 2 is only mapped to a specific CW. For example, (a) can be CW1, and the CSI part 1 / 2 can be only mapped to CW1. In another example, (a) can be CW2, and the CSI part 1 / 2 can be only mapped to CW2. Option 4 has the advantage of ensuring the data RE for a specific CW by reducing the repetition of the CSI part 1 / 2. In addition, the specific UE to which all UCI is mapped can be based on Proposal 1-E (to be described later). That is, the CW to which all UCI is mapped can correspond to the CW with a higher MCS or more layers between the two CWs. This is intended to increase the reliability of UCI.

[0162] In addition, in Proposal 1, for the HARQ-ACK RE, at most X bits (e.g., X = 2 or configurable) can be repeatedly mapped to all CWs. However, for more than 2 bits, the mapping can be spread across all CWs.

[0163] The above mapping to all layers can mean that specific REs are punctured and the HARQ-ACK bits are multiplexed to those REs.

[0164] Each of Options 0, 1, 2, and 3 in Proposal 1 has its own advantages and disadvantages. In addition, the DL codebook can have a very large payload (e.g., type 2 codebook) or a much smaller payload (e.g., type 1 codebook). Therefore, the size of the partial 2 CSI can vary according to the codebook. Therefore, greater flexibility is required when configuring / indicating these cases. For this purpose, an explicit indicator can be used to indicate the mapping rule, or implicit mapping to a specific option can be considered according to the codebook type.

[0165] In an implementation of Proposal 1, the UCI bits are multiplexed / mapped to the layer domain sequentially. For example, when CW1 undergoes 2-layer transmission and the HARQ-ACK (encoded) bits are 4 bits, every 2 bits are mapped to one layer.

[0166] Currently, for the uplink 2-CW to layer mapping, it has been agreed to follow the DL CW to layer mapping. Therefore, for L-layer transmission with L > 4, floor(L / 2) layers are mapped to the first CW, and the remaining layers are mapped to CW2.

[0167] In this case, different CWs can have different numbers of layers (specifically, the doubling relationship does not hold). For example, for rank 5 transmission, CW1 can undergo 2-layer transmission and CW2 can undergo 3-layer transmission. In this case, when the HARQ-ACK bits are repeatedly mapped to the two CWs, it may be difficult to map the bits by layer. To solve this problem, the present disclosure proposes the following.

[0168] (A) Proposal 1-A. In 2-CW transmission, each bit of some or all specific UCI (e.g., HARQ-ACK, CSI part 1, CSI part 2) can be repeatedly mapped to the layers of 2 CWs.

[0169] For example, contrary to the above, Proposal 1-A implies that HARQ-ACK bits are repeatedly mapped to all layers. That is, in the above example, the HARQ-ACK bits (4 bits) can be repeatedly mapped to all layers (i.e., 5 layers in the above example).

[0170] (B) Proposal 1-B. In 2CW transmission, for each bit of some or all specific UCI (e.g., HARQ-ACK, CSI part 1, CSI part 2), the specific UCI bit can be calculated based on the CW with the minimum number of layers among CWs and be repeatedly mapped to each CW. The specific layer of the CW corresponding to more layers can be filled with 0, or the bits of the specific layer can be repeatedly mapped.

[0171] For example, in the above example, the HARQ-ACK bits are generated as 4 bits based on the 2 layers of CW1. For CW1, each of the 2 layers is mapped to 2 bits. For CW2, when there are the first layer, the second layer, and the third layer, the first layer and the second layer are each mapped to 2 bits, and the third layer is mapped by copying / repeating the bits of the first layer (or the second layer). Alternatively, the third layer is filled with zeros.

[0172] (C) Proposal 1-C. In 2CW transmission, for each bit of some or all specific UCI (e.g., HARQ-ACK, CSI part 1, CSI part 2), the specific UCI bit can be calculated based on the CW with the maximum number of layers among CWs and be repeatedly mapped to each CW. When mapping the CW corresponding to fewer layers, only the layers that can be mapped can be mapped, and the remaining bits can be discarded instead of being mapped.

[0173] For example, in the above example, the HARQ-ACK bits are generated as 6 bits based on the 3 layers of CW2. For CW2, each of the 3 layers is mapped to 2 bits. For CW1, when there are the first layer, the second layer, and the third layer, the first layer and the second layer are each mapped to 2 bits, and the remaining 2 bits are discarded without being mapped.

[0174] (D) Proposal 1-D. In 2-CW transmission, each information bit of some or all specific UCI (e.g., HARQ-ACK, CSI part 1, CSI part 2) can be repeatedly mapped to the layers of 2-CW, and the coded bits mapped to the layers are generated based on the number of layers corresponding to each CW.

[0175] For example, in the above example, the HARQ-ACK bits repeatedly mapped to each CW are generated as 4 bits for CW1 and 6 bits for CW2. Therefore, 2 bits are mapped to each layer. In this case, each CW is mapped to a different number of HARQ-ACK (encoded) bits.

[0176] (E) Proposal 1-E. Some or all specific UCI (e.g., HARQ-ACK, CSI part 1, CSI part 2) may be multiplexed only to specific CW according to the following rules.

[0177] In one method, the UCI is only mapped to the CW with more (or fewer) layers without repeating the specific UCI (e.g., HARQ-ACK, CSI part 1, CSI part 2). If two CWs have the same number of layers, the UCI is mapped to a specific CW (predetermined or preset CW, e.g., CW1). For example, in the above example, when the mapping is performed based on the CW with fewer layers, some or all UCI are only mapped to CW1.

[0178] As an alternative to the above example, all UCI may be multiplexed / mapped only to the CW with a larger (or smaller) value of MCS (e.g., the IMCS field). If two CWs have the same MCS value, the UCI is multiplexed / mapped to a specific CW (predetermined or preset CW, e.g., CW1 or CW2). For example, in the above example, when the index of the MCS of CW1 is 10 and the MCS value of CW2 is 13, all UCI may be multiplexed / mapped to CW2. Additionally, if two CWs have the same MCS value, some or all UCI are only multiplexed / mapped to CW1 with index 0 (or CW2 with index 1). As an example, when transmitting two CWs (i.e., in the case of 8Tx, indicating TRI >= 4 to enable 2CW), all UCI may be multiplexed only to the CW with a larger MCS value (in the above example, CW2).

[0179] As an alternative to the above example, all UCI may be mapped to the CW with a larger (or smaller) function value of (number of layers, modulation order) (e.g., number of layers × modulation order). When two CWs have the same function value, some or all UCI are mapped to a specific CW (predetermined or preset CW, e.g., CW1).

[0180] As an alternative to the above example, all UCI may be mapped to the CW with a larger (or smaller) TB size. If two CWs have the same TB size, some or all UCI are only mapped to a specific CW (predetermined or preset CW, e.g., CW1 (or CW2)).

[0181] As an alternative to the above example, all UCIs can be mapped to the CW with a larger SINR. If two CWs have the same SINR, some or all UCIs are mapped to a specific CW (predetermined or preset, e.g., CW1 (or CW2)).

[0182] Examples of mapping only some UCIs to a specific CW may include HARQ-ACK bits and / or CSI part 1.

[0183] UCI multiplexing operations based on the priority of HARQ ACK-NACK / PUSCH supported by NR URLLC can also be considered. In Rel-16 NR, when the resources of high-priority (HP) PUCCH / PUSCH and low-priority (LP) PUCCH / PUSCH (e.g., on the timeline) overlap with each other, the LP PUCCH / PUSCH will always be discarded and the PUCCH / PUSCH corresponding to the HP will be sent. In Rel-17, when HP / LP PUCCH overlaps with LP / HP PUSCH, multiplexing that supports mapping HP / LP UCI to LP / HP PUSCH and sending is supported. Therefore, UE capabilities support the following cases (i) to (iv).

[0184] (i) HP UCI on LP PUSCH

[0185] (ii) LP UCI on HP PUSCH

[0186] (iii) HP UCI + LP UCI on HP PUSCH

[0187] (iv) HP UCI + LP UCI on LP PUSCH

[0188] When the above cases (i) to (iv) are extended to the case of 2CW PUSCH, based on Proposal 1 or 1-A / B / C / D / E, specific UCIs can be mapped to only one CW or two CWs according to the priority.

[0189] In particular, when multiplexing on HP PUSCH, HP UCI can be mapped to only one CW (based on Proposal E), and when multiplexing on LP PUSCH, it can be repeatedly mapped to two CWs. In the above example, this scheme can be limited to HP HARQ-ACK and / or part 1 CSI. Additionally, regardless of whether multiplexing is on HP PUSCH or LP PUSCH, LP UCI (and / or HP CSI) can always be mapped to only one CW (based on Proposal E).

[0190] In the current NR specification, when the number of HARQ-ACK bits <= 2, the HARQ-ACK bits can be mapped by puncturing a specific UCI (e.g., CSI part 2 or PUSCH). In particular, even when the number of HARQ-ACK bits <= 2, the high-priority PUSCH is not punctured, but the UCI can be multiplexed as in the case where the number of HARQ-ACK bits > 2. In other words, when the UCI is mapped to the high-priority PUSCH, the PUSCH is not punctured regardless of the number of HARQ-ACK bits.

[0191] Proposal 1-1

[0192] In alternatives 0 / 1 / 2 / 3 of Proposal 1, the UCI (e.g., HARQ-ACK RE / CSI part 1 / CSI part 2) mapped to CW2 can be punctured to leave the corresponding RE unoccupied, and UL-SCH2 of CW2 can be sent without UCI.

[0193] The advantage of Proposal 1-1 is that the power to be used on the punctured RE can be used for other REs (e.g., CW2 transmission) to increase the power of those REs.

[0194] Therefore, in alternatives 0 / 1 / 2 / 3 of Proposal 1, some or all of the HARQ-ACK REs and / or CSI part 1 and / or CSI part 2 multiplexed to CW2 can be punctured. The unpunctured UCI should follow alternatives 0 / 1 / 2 / 3 of Proposal 1, and the remaining UCI should be punctured.

[0195] In another embodiment, when specific UCI is punctured, as in Proposal 1-1, according to the number of REs punctured, they can be punctured evenly throughout CW2 or in a specific pattern. This is intended to prevent an entire specific symbol from being punctured, and an example of this is described below. As a special case, the UCI may not be multiplexed to CW2, and may be punctured according to the number of REs of the specific UCI multiplexed to CW1 or a predefined number of REs.

[0196] Figure 14 An example of UCI mapping according to Proposal 1-1 is shown.

[0197] In Figure 14 , UL-SCH2 is mapped to CW2 without UCI, and specific REs are punctured. The puncturing pattern can be determined according to the number of REs corresponding to some or all of the UCI as described above or a specific predefined pattern, or a specific puncturing pattern can be indicated / configured by the BS.

[0198] [Table 6]

[0199]

[0200]

[0201] 38.212 standard document defines the number of UCI REs. Table 6 is an excerpt from the section in 38.212 standard document that defines the number of HARQ-ACK REs.

[0202] In addition, the number of REs in CSI part 1 / 2 defined in 38.212 standard document is summarized in Equation 1 / 2. Equation 1 represents the number of UCI REs with UL-SCH (data) on PUSCH, and Equation 2 represents the number of UCI REs without UL-SCH (data) on PUSCH.

[0203] [Equation 1]

[0204]

[0205] [Equation 2]

[0206]

[0207] As shown in the above Equation 1 / 2, RRC-configurable α is introduced for UCI RE restriction. As a scaling value in PUSCH-config, the value of α is indicated / set.

[0208] [Table 7]

[0209]

[0210] When dual CW is supported, the above parameters may need to be enhanced for BS configuration and flexibility. For this purpose, the following is proposed.

[0211] Proposal 2

[0212] According to Proposal 2, the higher layer parameter scaling (α) can be configured / applied differently for each CW. For example, the α values in alternatives 0 / 1 / 2 / 3 in Proposal 1 can be set / applied differently for each CW. That is, multiple values of α can be set for CW respectively.

[0213] Equation 3 is an excerpt of the right component in the min{,} operation in Equation 1 / 2.

[0214] [Equation 3]

[0215]

[0216] In one embodiment, in Equation 3, different values of α can be applied to CW respectively. For example, when α1 / 2 are applied to CW1 and CW2 respectively in Equation 3, Equation 4 can be obtained.

[0217] [Equation 4]

[0218] For CW1

[0219] For CW2

[0220] In Proposal 2, according to the alternatives in Proposal 1 (e.g., alternatives 0 / 1 / 2 / 3), the types and quantities of UCI mapped to each CW are different. Therefore, in Proposal 2, when applying a specific alternative in Proposal 1, different values of α can be set / indicated for each CW to perform RE mapping. This aims to increase the flexibility of the RE configuration / indication for each CW.

[0221] As another example of Proposal 2, for a single value of the α set, the above formula can be set to vary according to the number of CWs / layers transmitted. For example, Equation 3 in the min{,} operation can be expressed as Equation 5.

[0222] [Equation 5]

[0223]

[0224] For example, in Equation 5, K can be determined based on the number of CWs. For example, only for 2TB transmissions (e.g., transmissions with RANK > 4), the value of K can be set to K = 2. For a UE capable of transmitting 2TB by ability, K can be set to K = 2 or the value set by the BS as a higher layer parameter. Using this method, the amount of UCI mapped to all CWs can be considered to limit the amount of UCI, regardless of the amount of UCI mapped to each CW.

[0225] In another embodiment, α can be set differently for the 1TB PUSCH and 2TB PUSCH cases. In other words, the α value assumed by the UE in the case of transmissions with rank > 4 can be different from the α value assumed in the opposite case (rank <= 4).

[0226] Proposal 2 applies to one serving cell.

[0227] Proposal 3

[0228] According to Proposal 3, for alternatives 0 / 1 / 2 / 3 in Proposal 1, β offsets can be set / applied differently for each CW. In other words, multiple β offset values can be set for each CW.

[0229] The β offset values included in the left - hand component of the min{,} operation in Equation 1 / 2 above can also be set / applied differently for each CW.

[0230] For example, the left - hand component of the min{,} operation in Equation 1 is shown in Equation 6.

[0231] [Equation 6]

[0232]

[0233] When different β offsets are applied to each CW in Equation 6, Equation 7 can be obtained.

[0234] [Equation 7]

[0235] For CW1

[0236] For CW2

[0237] In Proposal 3, according to the alternatives in Proposal 1 (e.g., alternatives 0 / 1 / 2 / 3), the type and quantity of UCI mapped to each CW are different. Therefore, in Proposal 2, when applying a specific alternative in Proposal 1, different β offset values can be set / indicated for each CW to perform RE mapping. This aims to increase the flexibility of the RE configuration / indication for each CW. In another embodiment, the β offset can be set semi-statically or dynamically. Only for semi-static setting, Proposal 3 can be configured.

[0238] Proposal 3 is applicable to one serving cell.

[0239] In another embodiment, the β offset can be set (differently) for the 1TB PUSCH and 2TB PUSCH cases. In other words, the β offset value assumed by the UE in the case of transmissions with rank > 4 can be different from the β offset value assumed in the opposite case (rank <= 4).

[0240] In the above proposal, 2-CW transmission is the case when the UE performs uplink transmission with rank > 4, and the rank information related to 2-CW transmission can vary according to the CW-to-layer mapping.

[0241] Proposal 1, 2, and 3 and the above embodiments can be configured independently or in combination.

[0242] Figure 15 The flowchart of a method for a UE to transmit a signal in a wireless communication system according to one embodiment is shown.

[0243] Referring to Figure 15 , the UE can receive downlink control information (DCI) (A05) for uplink scheduling.

[0244] The UE can multiplex UCI (A10) on the PUSCH. Based on the UCI overlapping with the PUSCH transmission, the UCI can be carried on the PUSCH.

[0245] The UE can transmit a physical uplink shared channel (PUSCH) (A15) based on the DCI.

[0246] The transmission based on PUSCH is related to 8 transmission ports and includes multiple codewords (CWs), and the first uplink control information (UCI) can be multiplexed into one of the CWs. The first UCI can be multiplexed into one of the CWs that can have the highest modulation and coding scheme (MCS) value among the CWs. Based on the number of CWs having the highest MCS value being greater than or equal to 2, the CW having the lowest CW index among the CWs having the highest MCS value can be determined as one of the CWs into which the first UCI can be multiplexed.

[0247] The CW can include a first CW having a first index and a second CW having a second index higher than the first index. Based on the first CW and the second CW having the same MCS value, the first UCI can be multiplexed only into the first CW.

[0248] The first UCI can include hybrid automatic repeat request - acknowledgement (HARQ - ACK), channel state information (CSI) part 1, and CSI part 2.

[0249] A second UCI different from the first UCI can be multiplexed into all CWs.

[0250] In one example, the second UCI can include hybrid automatic repeat request - acknowledgement (HARQ - ACK). The HARQ - ACK can be repeatedly mapped on multiple CWs.

[0251] In one example, a second UCI different from the first UCI can be multiplexed into all CWs. The second UCI can include channel state information (CSI). The CSI can be mapped once on multiple CWs.

[0252] Based on the first UCI having a first priority value lower than a second priority value, the first UCI can be multiplexed only into the determined one CW.

[0253] A second UCI having a second priority value higher than the first priority value can be multiplexed into all CWs.

[0254] When the rank value is greater than 4, the CW can be enabled.

[0255] A high - layer parameter for determining the number of UCI resource elements (REs) can be configured for each CW. The high - layer parameter can include at least one of an α parameter for rate matching or a β offset parameter.

[0256] Figure 16 The flow of a method for a BS to receive a signal in a wireless communication system according to an embodiment is shown.

[0257] The BS can send downlink control information (DCI) (B05) for uplink scheduling.

[0258] The BS may receive a Physical Uplink Shared Channel (PUSCH) (B10) based on the DCI.

[0259] The BS may demultiplex the UCI multiplexed into the CWs of the PUSCH (B15).

[0260] Based on the reception of the PUSCH being related to 8 transmission ports and including multiple Codewords (CWs), a first Uplink Control Information (UCI) may be demultiplexed from one of the CWs.

[0261] One CW from which the first UCI is demultiplexed may have the highest Modulation and Coding Scheme (MCS) value among the CWs. Based on the number of CWs having the highest MCS value being greater than or equal to 2, the CW having the lowest CW index among the CWs having the highest MCS value may be determined as one CW from which the first UCI is demultiplexed.

[0262] The CWs may include a first CW having a first index and a second CW having a second index higher than the first index. Based on the first CW and the second CW having the same MCS value, the first UCI may be demultiplexed only from the first CW.

[0263] The first UCI may include Hybrid Automatic Repeat reQuest - ACK (HARQ - ACK), Channel State Information (CSI) part 1, and CSI part 2.

[0264] A second UCI different from the first UCI may be demultiplexed from all CWs.

[0265] In one example, the second UCI may include Hybrid Automatic Repeat reQuest - ACK (HARQ - ACK). The HARQ - ACK may be repeatedly mapped on multiple CWs.

[0266] In one example, a second UCI different from the first UCI may be multiplexed into all CWs. The second UCI may include Channel State Information (CSI). The CSI may be mapped once on multiple CWs.

[0267] Based on the first UCI having a first priority value lower than a second priority value, the first UCI may be demultiplexed only from the determined one CW.

[0268] A second UCI having a second priority value higher than the first priority value may be demultiplexed from all CWs.

[0269] When the rank value is greater than 4, the CWs may be enabled.

[0270] A higher - layer parameter for determining the number of UCI Resource Elements (REs) may be configured for each CW. The higher - layer parameter may include at least one of an α parameter for rate matching or a β offset parameter.

[0271] Figure 17 FIG. 1 shows a communication system 1 to which the present disclosure is applied.

[0272] Referring Figure 17 to FIG. 1, the communication system 1 includes wireless devices, a base station (BS), and a network. Herein, a wireless device represents 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. The wireless devices may include (but are not limited to) a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle having a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device, and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) mounted in a vehicle, a TV, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. The handheld device may include a smartphone, a smart board, a wearable device (e.g., a smartwatch or smart glasses), and a computer (e.g., a notebook). The home appliance may include a TV, a refrigerator, and a washing machine. The IoT device may include a sensor and a smart meter. For example, the BS and the network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node with respect to other wireless devices.

[0273] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without passing through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). The IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0274] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, 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)). The wireless devices and the BS / wireless devices can send / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can send / receive signals via various physical channels. To this end, at least a part of the various configuration information for configuring processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes can be executed based on the various proposals of the present disclosure.

[0275] Figure 18 A wireless device applicable to the present disclosure is shown.

[0276] Referring to Figure 18 , the first wireless device 100 and the second wireless device 200 can send radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} can correspond to Figure 17 {wireless device 100x and BS200} and / or {wireless device 100x and wireless device 100x} of

[0277] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit radio signals including the first information / signals through the transceiver 106. The processor 102 may receive radio signals including second information / signals through the transceiver 106, and then store the information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software codes including commands for executing part or all of the processes controlled by the processor 102 or for executing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In this disclosure, the wireless device may represent a communication modem / circuit / chip.

[0278] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit radio signals including the third information / signals through the transceiver 206. The processor 202 may receive radio signals including fourth information / signals through the transceiver 206, and then store the information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes including commands for executing part or all of the processes controlled by the processor 202 or for implementing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with the RF unit. In this disclosure, the wireless device may represent a communication modem / circuit / chip.

[0279] In the following, the hardware components of wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by (but 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, procedures, 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, procedures, 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, procedures, 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) from one or more transceivers 106 and 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document.

[0280] One or more processors 102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. 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 processor 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, procedures, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, procedures, or functions. The firmware or software configured to execute the descriptions, functions, procedures, 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, procedures, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of code, commands, and / or command sets.

[0281] 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 by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium, and / or combinations thereof. One or more memories 104 and 204 may be located inside and / or outside 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 by various techniques such as wired or wireless connections.

[0282] One or more transceivers 106 and 206 may send user data, control information, and / or radio signals / channels mentioned in the methods and / or operational flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive descriptions, functions, processes, proposals, methods, and / or user data, control information, and / or radio signals / channels mentioned in the operational 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 send and receive radio signals. For example, one or more processors 102 and 202 may execute controls such that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may execute controls such that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert the received radio signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert the user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0283] Figure 19 Another example of a wireless device to which the present disclosure is applied is shown. The wireless device may be implemented in various forms according to usage / services (refer to Figure 17 ).

[0284] Refer to Figure 19 , the wireless devices 100 and 200 may correspond to Figure 18Wireless devices 100 and 200, and can be configured by 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 additional components 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Figure 18 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Figure 18 One or more transceivers 106 and 206 and / or one or more antennas 108 and 208. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operations of the wireless device based on programs / codes / commands / information stored in the memory unit 130. The control unit 120 may send the information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store the information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0285] The additional components 140 may be configured differently according to the type of the wireless device. For example, the additional components 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 may be implemented as (but not limited to) a robot ( Figure 17 100a), a vehicle ( Figure 17 100b-1 and 100b-2), an XR device ( Figure 17 100c), a handheld device ( Figure 17 100d), a household appliance ( Figure 17 100e), an IoT device ( Figure 17 100f), a digital broadcast terminal, a holographic device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device ( Figure 17 400), a BS ( Figure 17 200), a network node, etc. The wireless device may be used in a mobile or fixed location according to usage examples / services.

[0286] In Figure 19Among them, various components, units / parts, and / or modules in the wireless devices 100 and 200 can all be connected to each other through a wired interface, or at least a part of them can be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 can be wired-connected, and the control unit 120 and the first units (e.g., 130 and 140) can be wirelessly connected through the communication unit 110. Each component, unit / part, and / or module within the wireless devices 100 and 200 can also include one or more elements. For example, the control unit 120 can be configured by a set of one or more processors. As an example, the control unit 120 can be configured by a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit, and a memory control processor. As another example, the memory unit 130 can be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0287] Figure 20 Illustrates a vehicle or an autonomous driving vehicle to which the present disclosure is applied. The vehicle or the autonomous driving vehicle can be implemented by a mobile robot, an automobile, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0288] Refer to Figure 20 , the vehicle or the autonomous driving vehicle 100 can include an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 can be configured as a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to Figure 19 blocks 110 / 130 / 140 of

[0289] The communication unit 110 may transmit signals (e.g., data and control signals) to and receive signals from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous driving vehicle 100. The control unit 120 may include an electronic control unit (ECU). The driving unit 140a may cause the vehicle or autonomous driving vehicle 100 to travel on a road. The driving unit 140a may include an engine, a motor, a power system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous driving vehicle 100 and includes a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may acquire vehicle state, surrounding environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a depth sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement technologies for maintaining the lane in which the vehicle is traveling, technologies for automatically adjusting the speed (e.g., adaptive cruise control), technologies for autonomously traveling along a determined path, technologies for traveling by automatically setting a path if a destination is set, etc.

[0290] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the obtained data. The control unit 120 may control the driving unit 140a such that the vehicle or autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 may acquire the latest traffic information data from the external server non-periodically / periodically and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c may obtain the vehicle state and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and the driving plan based on the newly obtained data / information. The communication unit 110 may transmit information about the vehicle position, the autonomous driving path, and / or the driving plan to the external server. The external server may use AI technologies, etc. to predict traffic information data based on the information collected from the vehicle or autonomous driving vehicle and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0291] Figure 21 is a diagram illustrating the DRX operation of a UE according to an embodiment of the present disclosure.

[0292] The UE can perform DRX operations in the processes and / or methods described / proposed above. The UE configured with DRX can reduce power consumption by receiving DL signals discontinuously. DRX can be performed in the RRC_IDLE state, RRC_INACTIVE state, and RRC_CONNECTED state. The UE performs DRX in the RRC_IDLE state and RRC_INACTIVE state to receive paging signals discontinuously. The DRX in the RRC_CONNECTED state (RRC_CONNECTED DRX) will be described below.

[0293] Referring to Figure 21 , the DRX cycle includes an on-duration and a DRX opportunity. The DRX cycle defines the time interval between periodic repetitions of the on-duration. The on-duration is the time period during which the UE monitors the PDCCH. When the UE is configured with DRX, the UE performs PDCCH monitoring during the on-duration. When the UE successfully detects the PDCCH during PDCCH monitoring, the UE starts an inactivity timer and remains awake. On the contrary, when the UE fails to detect any PDCCH during PDCCH monitoring, the UE transitions to the sleep state after the on-duration. Therefore, when DRX is configured, PDCCH monitoring / reception can be performed discontinuously in the time domain in the processes and / or methods described / proposed above. For example, when DRX is configured, the PDCCH reception timing (e.g., the time slot with PDCCH SS) can be configured discontinuously according to the DRX configuration in the present disclosure. On the contrary, when DRX is not configured, PDCCH monitoring / reception can be performed continuously in the time domain. For example, when DRX is not configured, the PDCCH reception timing (e.g., the time slot with PDCCH SS) can be configured continuously in the present disclosure. Regardless of whether DRX is configured, PDCCH monitoring can be restricted during the time period configured as a measurement gap.

[0294] The UE receives DRX configuration information through higher layer signaling (e.g., RRC signaling) and controls DRX on / off through DRX commands from the MAC layer. Once DRX is configured, the UE can perform PDCCH monitoring discontinuously when executing the processes and / or methods described / proposed above.

[0295] The above-described embodiments correspond to combinations of elements and features of the present disclosure in prescribed forms. Also, unless explicitly mentioned, each element or feature may be regarded as optional. Each element or feature may be implemented in a form that does not combine with other elements or features. In addition, embodiments of the present disclosure can be implemented by partially combining elements and / or features. The operation order described for each embodiment of the present disclosure can 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. Also, it will be clearly understood that embodiments are configured by combining claims that do not have an explicit citation relationship in the appended claims, or may be included as new claims by amendment after filing an application.

[0296] Those skilled in the art will understand that the present disclosure can be implemented in other specific forms than those described herein without departing from the spirit and basic characteristics of the present disclosure. Therefore, the above-described embodiments should be construed in all respects as illustrative and not restrictive. The scope of the present disclosure should be determined by the appended claims and their legal equivalents, rather than by the above description, and all changes falling within the meaning and scope of equivalence of the appended claims are intended to be covered therein.

[0297] Industrial Applicability

[0298] The present disclosure is applicable to a UE, a BS, or other devices in a wireless mobile communication system.

Claims

1. A method for a terminal to transmit a signal in a wireless communication system, the method comprising the following steps: Receiving downlink control information DCI for uplink scheduling; And Transmitting a physical uplink shared channel PUSCH based on the DCI, wherein the transmission based on the PUSCH is related to 8 transmission ports and includes a plurality of codewords CW, and a first uplink control information UCI is multiplexed into one CW of the plurality of CWs, wherein the one CW into which the first UCI is multiplexed has the highest modulation and coding scheme MCS value among the plurality of CWs, and wherein based on the number of CWs having the highest MCS value being greater than or equal to 2, the CW having the lowest CW index among the CWs having the highest MCS value is determined as the one CW into which the first UCI is multiplexed.

2. The method according to claim 1, wherein The plurality of CWs includes a first CW having a first index and a second CW having a second index higher than the first index, wherein based on the first CW and the second CW having the same MCS value, the first UCI is only multiplexed into the first CW.

3. The method according to claim 1, wherein, The first UCI includes hybrid automatic repeat request - acknowledgement HARQ - ACK, channel state information CSI part 1, and CSI part 2.

4. The method according to claim 1, wherein A second UCI different from the first UCI is multiplexed into all of the plurality of CWs, wherein the second UCI includes hybrid automatic repeat request - acknowledgement HARQ - ACK, wherein the HARQ - ACK is repeatedly mapped on the plurality of CWs.

5. The method according to claim 1, wherein A second UCI different from the first UCI is multiplexed into all of the plurality of CWs, wherein the second UCI includes channel state information CSI, wherein the CSI is mapped once on the plurality of CWs.

6. The method according to claim 1, wherein, Based on the first UCI having a first priority value lower than a second priority value, the first UCI is only multiplexed into the determined one CW.

7. The method according to claim 6, wherein, A second UCI having a second priority value higher than the first priority value is multiplexed into all of the plurality of CWs.

8. The method according to claim 1, wherein When the rank value is greater than 4, the plurality of CWs are enabled.

9. The method according to claim 1, wherein, Configuring a high - layer parameter for each CW to determine the number of UCI resource elements RE, wherein the high - layer parameter includes at least one of an α parameter or a β offset parameter for rate matching.

10. A computer - readable recording medium storing a program for executing the method according to claim 1.

11. An apparatus for wireless communication, the apparatus comprising: A memory configured to store instructions; And A processor configured to execute the instructions to perform operations, wherein the operations of the processor include: Receiving downlink control information DCI for uplink scheduling; and Transmitting a physical uplink shared channel PUSCH based on the DCI, wherein the transmission based on the PUSCH is related to 8 transmission ports and includes a plurality of codewords CW, and a first uplink control information UCI is multiplexed into one CW of the plurality of CWs, Among them, the one CW among the multiple CWs into which the first UCI is multiplexed has the highest modulation and coding scheme (MCS) value among the multiple CWs, and wherein, based on the number of CWs having the highest MCS value being greater than or equal to 2, the CW having the lowest CW index among the CWs having the highest MCS value is determined as the one CW into which the first UCI is multiplexed.

12. The apparatus according to claim 11, wherein the apparatus further comprises a transceiver, Among them, and the apparatus is a terminal operating in a wireless communication system.

13. The device according to claim 11, wherein, The apparatus is a processing device configured to control a terminal operating in a wireless communication system.

14. A method for a base station to receive a signal in a wireless communication system, the method comprising the following steps: transmitting downlink control information (DCI) for uplink scheduling; and receiving a physical uplink shared channel (PUSCH) based on the DCI, wherein, based on the reception of the PUSCH being related to 8 transmission ports and including multiple codewords (CWs), a first uplink control information (UCI) is demultiplexed from one CW among the multiple CWs, wherein the one CW from which the first UCI is demultiplexed has the highest modulation and coding scheme (MCS) value among the multiple CWs, and wherein, based on the number of CWs having the highest MCS value being greater than or equal to 2, the CW having the lowest CW index among the CWs having the highest MCS value is determined as the one CW from which the first UCI is demultiplexed.

15. A base station for wireless communication, the base station comprising: a memory configured to store instructions; and a processor configured to execute the instructions to perform operations, wherein the operations of the processor include: transmitting downlink control information (DCI) for uplink scheduling; and receiving a physical uplink shared channel (PUSCH) based on the DCI, wherein, based on the reception of the PUSCH being related to 8 transmission ports and including multiple codewords (CWs), a first uplink control information (UCI) is demultiplexed from one CW among the multiple CWs, wherein the one CW from which the first UCI is demultiplexed has the highest modulation and coding scheme (MCS) value among the multiple CWs, and wherein, based on the number of CWs having the highest MCS value being greater than or equal to 2, the CW having the lowest CW index among the CWs having the highest MCS value is determined as the one CW from which the first UCI is demultiplexed.

Images