Transmission method of phase tracking reference signal for multi-panel simultaneous transmission in a wireless communication system and apparatus therefor

Abstract

The present invention relates to a method performed by a UE (User Equipment) in a wireless communication system. Specifically, the method includes receiving DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) from a BS (Base Station), and based on the association information of the PT (Phase Tracking)-RS (Reference Signal) port pair to the DM (Demodulation)-RS port, transmitting a first PT-RS on a first PT-RS port and transmitting a second PT-RS on a second PT-RS port to the BS, wherein the first information of the association information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port associated with the first PT-RS port among the DM-RS ports corresponding to at least one of a first SRI (Sounding reference signal Resource Indicator) and first precoding information, and the second information of the association information of the PT-RS port pair to the DM-RS port indicates a second DM-RS port associated with the second PT-RS port among the DM-RS ports corresponding to at least one of a second SRI and second precoding information.

Description

Technical Field

[0001] The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting a phase tracking-reference signal (PT-RS) for simultaneous transmission across multi-panel (STxMP) in a wireless communication system and an apparatus therefor.

Background Art

[0002] Wireless communication systems are widely deployed to provide various communication services such as voice and data. In general, a wireless communication system is a multiple access system that can support communication with multiple users by sharing available system resources (such as bandwidth and transmission power). Examples of multiple access systems include a CDMA (code division multiple access) system, an FDMA (frequency division multiple access) system, a TDMA (time division multiple access) system, an OFDMA (orthogonal frequency division multiple access) system, an SC-FDMA (single carrier frequency division multiple access) system, and the like.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Based on the above discussion, a method for transmitting a phase tracking-reference signal for simultaneous transmission of multi-panels in a wireless communication system and an apparatus therefor will be proposed below.

[0004] The technical problems to be achieved by the present invention are not limited to the above technical problems, and other technical problems not mentioned will be clearly understandable to those with ordinary knowledge in the technical field to which the present invention belongs from the following description.

Means for Solving the Problems

[0005] In one aspect of the present invention, a method performed by a UE (User Equipment) in a wireless communication system is provided. The method includes receiving DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) from a BS (Base Station), and based on the related information of the PT (Phase Tracking)-RS (Reference Signal) port pair to the DM (Demodulation)-RS port included in the DCI, transmitting a first PT-RS on a first PT-RS port and transmitting a second PT-RS on a second PT-RS port to the BS. The first information of the related information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port related to the first PT-RS port among the DM-RS ports corresponding to at least one of the first SRI (Sounding reference signal Resource Indicator) and the first precoding information. The second information of the related information of the PT-RS port pair to the DM-RS port indicates a second DM-RS port related to the second PT-RS port among the DM-RS ports corresponding to at least one of the second SRI and the second precoding information.

[0006] In another aspect of the present invention, a UE (User Equipment) is provided in a wireless communication system. The user equipment includes at least one transceiver, at least one processor, and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The operations include receiving DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) from a BS (Base Station), and based on the related information of the PT (Phase Tracking)-RS (Reference Signal) port pair to the DM (Demodulation)-RS port included in the DCI, transmitting a first PT-RS on a first PT-RS port and transmitting a second PT-RS on a second PT-RS port to the BS. The first information of the related information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port related to the first PT-RS port among the DM-RS ports corresponding to at least one of a first SRI (Sounding reference signal Resource Indicator) and first precoding information, and the second information of the related information of the PT-RS port pair to the DM-RS port indicates a second DM-RS port related to the second PT-RS port among the DM-RS ports corresponding to at least one of a second SRI and second precoding information.

[0007] In another aspect of the present invention, a processing device is provided in a wireless communication system. The processing device includes at least one processor and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations for a UE (User Equipment). The operations include receiving DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) from a BS (Base Station), and based on the associated information of the PT (Phase Tracking)-RS (Reference Signal) port pair to the DM (Demodulation)-RS port included in the DCI, transmitting a first PT-RS on a first PT-RS port and transmitting a second PT-RS on a second PT-RS port to the BS. The first information of the associated information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port associated with the first PT-RS port among the DM-RS ports corresponding to at least one of a first SRI (Sounding reference signal Resource Indicator) and first precoding information, and the second information of the associated information of the PT-RS port pair to the DM-RS port indicates a second DM-RS port associated with the second PT-RS port among the DM-RS ports corresponding to at least one of a second SRI and second precoding information.

[0008] In another aspect of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium stores at least one computer program that, when executed by at least one processor, causes the at least one processor to perform operations for a UE (User Equipment). The operations include receiving DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) from a BS (Base Station), and based on the associated information of the PT (Phase Tracking)-RS (Reference Signal) port pair to the DM (Demodulation)-RS port included in the DCI, transmitting a first PT-RS on a first PT-RS port and transmitting a second PT-RS on a second PT-RS port to the BS. The first information of the associated information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port associated with the first PT-RS port among the DM-RS ports corresponding to at least one of a first SRI (Sounding reference signal Resource Indicator) and first precoding information. The second information of the associated information of the PT-RS port pair to the DM-RS port indicates a second DM-RS port associated with the second PT-RS port among the DM-RS ports corresponding to at least one of a second SRI and second precoding information.

[0009] As another aspect of the present invention, a method performed by a BS (Base Station) in a wireless communication system is provided. The method includes transmitting DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) to a UE (User Equipment), and receiving a first PT-RS on a first PT port and a second PT-RS on a second PT-RS port from the UE based on association information of a (Phase Tracking)-RS (Reference Signal) (port) pair with a DM (Demodulation)-RS port included in the DCI, wherein first information of the association information of the PT-RS port pair with the DM-RS port indicates a first DM-RS port associated with the first PT-RS port among DM-RS ports corresponding to at least one of a first SRI (Sounding reference signal Resource Indicator) and first precoding information, and second information of the association information of the PT-RS port pair with the DM-RS port indicates a second DM-RS port associated with the second PT-RS port among DM-RS ports corresponding to at least one of a second SRI and second precoding information.

[0010] In another aspect of the present invention, a BS (Base Station) is provided in a wireless communication system. The user equipment includes at least one transceiver, at least one processor, and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The operations include transmitting DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) to a UE (User Equipment), and receiving, from the UE, a first PT-RS on a first PT port and a second PT-RS on a second PT port based on the associated information of the (Phase Tracking)-RS (Reference Signal) (port) pair to the DM (Demodulation)-RS port included in the DCI. The first information of the associated information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port associated with the first PT-RS port among the DM-RS ports corresponding to at least one of a first SRI (Sounding reference signal Resource Indicator) and first precoding information, and the second information of the associated information of the PT-RS port pair to the DM-RS port indicates a second DM-RS port associated with the second PT-RS port among the DM-RS ports corresponding to at least one of a second SRI and second precoding information.

[0011] Preferably, the UE receives from the BS information that the maximum number of the PT-RS is 2.

[0012] Preferably, the first information is the first bit of the associated information of the PT-RS port pair to the DM-RS port, and the second information is the second bit of the associated information of the PT-RS port pair to the DM-RS port.

[0013] Preferably, the UE receives information regarding a DM-RS port corresponding to at least one of the first SRI and the first precoding information from the BS, and information regarding a DM-RS port corresponding to at least one of the second SRI and the second precoding information.

[0014] Preferably, the first DM-RS port is associated with a first PUSCH transmitted on a first panel, the second DM-RS port is associated with a second PUSCH transmitted on a second panel, and the first PUSCH and the second PUSCH are transmitted by the BS using the same time and the same frequency resources.

[0015] The problem-solving method described above is only a part of the embodiments of the present invention, and various embodiments reflecting the technical features of the present invention can be derived and understood by those having ordinary knowledge in the art based on the detailed description of the present invention described below.

Advantages of the Invention

[0016] According to the present invention, wireless signal transmission and reception can be efficiently performed in a wireless communication system.

[0017] The effects obtained by the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understandable to those having ordinary knowledge in the technical field to which the present invention belongs from the following description.

Brief Description of the Drawings

[0018] The accompanying drawings, which are included as a part of the detailed description to assist in understanding the present invention, provide embodiments of the present invention and explain the technical idea of the present invention together with the detailed description.

[0019]

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Embodiments for Carrying Out the Invention

[0020] The following technologies can be used in various wireless connection systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (single carrier frequency division multiple access), etc. CDMA can be implemented by radio technologies such as UTRA (Universal Terrestrial Radio Access) and CDMA2000. TDMA can be implemented by radio technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented by radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (Evolved UTRA), etc. UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (long term evolution) is part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A is an evolved version of 3GPP LTE. 3GPP NR (New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A.

[0021] As more communication devices demand larger communication capacities, the need for mobile broadband communication that is improved compared to existing radio access technologies (RATs) is on the rise. In addition, massive machine type communications (MTC), which connects multiple devices and things to provide various services anytime and anywhere, is one of the important issues to be considered in next-generation communications. Also, the design of communication systems considering services / terminals sensitive to reliability and latency is being discussed. Thus, the introduction of next-generation RATs considering enhanced mobile broadband communication (eMBB), massive MTC, ultra-reliable and low latency communication (URLLC), etc. is being discussed, and in the present invention, for convenience, the corresponding technology is referred to as NR (New radio or New RAT).

[0022] For the sake of clarity, 3GPP NR will be mainly described, but the technical idea of the present invention is not limited thereto.

[0023] In this specification, the expression "setting" may be replaced with the expression "configuration", and the two may be used interchangeably. Also, conditional expressions (e.g., "if ~~", "in a case", or "when ~~") may be replaced with expressions such as "based on that ~~" or "in a state / status". Also, the operation of the terminal / base station or the SW / HW configuration due to the satisfaction of the corresponding conditions can be inferred / understood. Also, in the signal transmission and reception between wireless communication devices (e.g., base stations, terminals), if the process on the receiving (or transmitting) side can be inferred / understood from the process on the transmitting (or receiving) side, the description thereof may be omitted. For example, signal determination / generation / encoding / transmission on the transmitting side can be understood as signal monitoring / reception / decoding / determination on the receiving side. Also, the expression that the terminal performs (or does not perform) a specific operation can also be interpreted as the base station operating expecting / assuming (or not expecting / assuming) the execution of the specific operation of the terminal. The expression that the base station performs (or does not perform) a specific operation can also be interpreted as the terminal operating expecting / assuming (or not expecting / assuming) the execution of the specific operation of the base station. Also, in the following description, the sections, examples, illustrations, options, methods, plans, etc. and the indexes are for convenience of explanation, and it should not be interpreted that each of them necessarily constitutes an independent invention or that each of them must be implemented individually. Also, when explaining each section, example, illustration, option, method, plan, etc., if there is no explicitly conflicting / opposing description, it can be inferred / interpreted that at least a part of them can be combined and implemented together, or at least a part of them can be omitted and implemented.

[0024] In a wireless communication system, a terminal receives information from a base station via a downlink (DL), and the terminal transmits information to the base station via an uplink (UL). The information transmitted and received by the base station and the terminal includes data and various control information, and there are various physical channels depending on the type / usage of the information they transmit and receive.

[0025] FIG. 1 is a diagram for explaining physical channels used in a 3GPP system and a general signal transmission method using them.

[0026] A terminal that has powered on in the power-off state or newly entered a cell performs an initial cell search operation such as establishing synchronization with the base station (S101). For this purpose, the terminal receives an SSB (Synchronization Signal Block) from the base station. The SSB includes a PSS (Primary Synchronization Signal), an SSS (Secondary Synchronization Signal), and a PBCH (Physical Broadcast Channel). The terminal establishes synchronization with the base station based on the PSS / SSS and obtains information such as the cell ID (cell identity). In addition, the terminal obtains broadcast information within the cell based on the PBCH. Note that the terminal can receive a downlink reference signal (Downlink Reference Signal, DL RS) at the initial cell search stage to check the state of the downlink channel.

[0027] The terminal that has completed the initial cell search receives a physical downlink control channel (Physical Downlink Control Channel, PDCCH) and a physical downlink shared channel (Physical Downlink Control Channel, PDSCH) corresponding to the physical downlink control channel to obtain more specific system information (S102).

[0028] After that, in order for the terminal to complete the connection to the base station, it performs a random access procedure (S103 to S106). More specifically, the terminal transmits a preamble via a physical random access channel (PRACH) (S103), and receives a response message for the preamble via a physical downlink control channel and the corresponding physical downlink shared channel (S104). In the case of contention based random access, a contention resolution procedure such as further transmission of a physical random access channel (S105) and reception of a physical downlink control channel and the corresponding physical downlink shared channel (S106) is performed.

[0029] After performing such a procedure, the terminal then performs reception of the physical downlink control channel / physical downlink shared channel (S107) and transmission of the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) / physical uplink control channel (Physical Uplink Control Channel, PUCH) as general uplink / downlink signal transmission procedures. The control information transmitted by the terminal to the base station is referred to as uplink control information (Uplink Control Information, UCI). UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc. CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indication), etc. UCI is generally transmitted via the PUCCH, but may also be transmitted via the PUSCH when it is necessary to transmit control information and traffic data simultaneously. Also, according to the request / indication of the network, the terminal can transmit UCI non-periodically via the PUSCH.

[0030] FIG. 2 is a diagram illustrating the structure of a radio frame. In NR, uplink and downlink transmissions are composed of frames. One radio frame has a length of 10 ms and is divided into two 5-ms half-frames (HFs). One half-frame is divided into five 1-ms sub-frames (SFs). One sub-frame is divided into one or more slots, and the number of slots in a sub-frame depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols by means of a cyclic prefix (CP). When normal CP is used, each slot contains 14 OFDM symbols. When extended CP is used, each slot contains 12 OFDM symbols.

[0031] Table 1 shows the number of OFDM symbols per slot (N slot symb ), the number of slots per frame (N frame,u slot ), and the number of slots per sub-frame (N subframe,u slot ) when normal CP is used.

[0032]

Table 1

[0033] Table 2 shows the number of OFDM symbols per slot (N slot symb ), the number of slots per frame (N frame,u slot ), and the number of slots per sub-frame (N subframe,u slot ) when extended CP is used.

[0034]

Table 2

[0035] The frame structure is merely exemplary, and the number of sub - frames, slots, and symbols in the frame can be variously changed.

[0036] In the NR system, the OFDM numerology (e.g., SCS) can be set differently between a plurality of cells merged into one terminal. As a result, the (absolute time) intervals of time resources (e.g., SF, slot, or TTI) (collectively referred to as TU (Time Unit) for convenience) composed of the same number of symbols can be set differently between the merged cells. Here, the symbol includes an OFDM symbol (or, CP - OFDM symbol), an SC - FDMA symbol (or, Discrete Fourier Transform - spread - OFDM, DFT - s - OFDM symbol).

[0037] Figure 3 illustrates the resource grid of a slot. One slot includes a plurality of symbols in the time domain. For example, in the case of normal CP, one slot includes 14 symbols, while in the case of extended CP, one slot includes 12 symbols. A carrier includes a plurality of sub - carriers in the frequency domain. An RB (Resource Block) is defined by a plurality (e.g., 12) of consecutive sub - carriers in the frequency domain. A BWP (Bandwidth Part) is defined by a plurality of consecutive PRBs (Physical RB) in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier includes a maximum of N (e.g., 5) BWPs. Data communication is performed in the activated BWP, and only one BWP is activated for one terminal. Each element in the resource grid is referred to as a resource element (RE), and one modulated symbol can be mapped.

[0038] FIG. 4 is a diagram showing an example in which physical channels are mapped in a slot. In the DL control region, PDCCH is transmitted, and in the DL data region, PDSCH is transmitted. In the UL control region, PUCCH is transmitted, and in the UL data region, PUSCH is transmitted. GP provides a time gap in the process of the base station and the terminal switching from the transmission mode to the reception mode or in the process of switching from the reception mode to the transmission mode. Some symbols at the time of switching from DL to UL within a subframe can be set as GP.

[0039] Hereinafter, each physical channel will be described more specifically.

[0040] The PDCCH carries DCI (Downlink Control Information). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation of the DL-SCH (downlink shared channel), the resource allocation information for the UL-SCH (uplink shared channel), the paging information regarding the PCH (Paging Channel), the system information on the DL-SCH, the resource allocation information regarding higher layer control messages such as any connection response transmitted on the PDSCH, the transmission power control command, the activation / deactivation of CS (Configured scheduling), etc. The DCI includes a CRC (cyclic redundancy check), and the CRC is masked / scrambled with various identifiers (e.g., Radio Network Temporary Identifier, RNTI) according to the owner or usage purpose of the PDCCH. For example, if the PDCCH is for a specific terminal, the CRC is masked with the terminal identifier (e.g., Cell-RNTI, C-RNTI). If the PDCCH is related to paging, the CRC is masked with the P-RNTI (Paging-RNTI). If the PDCCH is related to system information (e.g., System Information Block, SIB), the CRC is masked with the SI-RNTI (System Information RNTI). If the PDCCH is related to any connection response, the CRC is masked with the RA-RNTI (Random Access-RNTI).

[0041] The PDCCH is composed of 1, 2, 4, 8, or 16 CCEs (Control Channel Elements) according to the AL (Aggregation Level). The CCE is a logical allocation unit used to provide a PDCCH with a predetermined code rate according to the radio channel state. The CCE is composed of 6 REGs (Resource Element Groups). The REG is defined by one OFDM symbol and one (P)RB. The PDCCH is transmitted by a CORESET (Control Resource Set). The CORESET is defined by a set of REGs having a given numerology (e.g., SCS, CP length, etc.). Multiple CORESETs for one terminal can overlap in the time / frequency domain. The CORESET is set by system information (e.g., Master Information Block, MIB) or UE-specific higher layer (e.g., Radio Resource Control, RRC, layer) signaling. Specifically, the number of RBs and the number of OFDM symbols (up to 3) constituting the CORESET are set by higher layer signaling.

[0042] For PDCCH reception / detection, the terminal monitors PDCCH candidates. The PDCCH candidates indicate the CCEs that the terminal should monitor for PDCCH detection. Each PDCCH candidate is defined by 1, 2, 4, 8, or 16 CCEs according to the AL. Monitoring includes (blind) decoding of the PDCCH candidates. The set of PDCCH candidates monitored by the terminal is defined as the PDCCH search space (SS). The search space includes a common search space (CSS) or a UE-specific search space (USS). The terminal can obtain DCI by monitoring PDCCH candidates in one or more search spaces set by the MIB or higher layer signaling. Each CORESET is associated with one or more search spaces, and each search space is associated with one CORESET. The search space is defined based on the following parameters.

[0043] - controlResourceSetId: Indicates the CORESET related to the search space.

[0044] - monitoringSlotPeriodicityAndOffset: Indicates the PDCCH monitoring period (in slots) and the PDCCH monitoring interval offset (in slots).

[0045] - monitoringSymbolsWithinSlot: Indicates the PDCCH monitoring symbols within a slot (e.g., indicates the first symbol of the CORESET).

[0046] - nrofCandidates: Indicates the number of PDCCH candidates (one of 0, 1, 2, 3, 4, 5, 6, 8) for each AL = {1, 2, 4, 8, 16}.

[0047] * Define the opportunity (e.g., time / frequency resource) to monitor PDCCH candidates as a PDCCH (monitoring) opportunity. One or more PDCCH (monitoring) opportunities are configured within a slot.

[0048] Table 3 illustrates the characteristics for each search space type.

[0049]

Table 3

[0050] Table 4 illustrates the DCI formats transmitted via PDCCH.

[0051]

Table 4

[0052] DCI format 0_0 is used to schedule TB-based (or TB-level) PUSCH, and DCI format 0_1 is used to schedule TB-based (or TB-level) PUSCH or CBG (Code Block Group)-based (or CBG-level) PUSCH. DCI format 1_0 is used to schedule TB-based (or TB-level) PDSCH, and DCI format 1_1 is used to schedule TB-based (or TB-level) PDSCH or CBG-based (or CBG-level) PDSCH (DL grant DCI). DCI formats 0_0 / 0_1 are called UL grant DCI or UL scheduling information, and DCI formats 1_0 / 1_1 are called DL grant DCI or DL scheduling information. DCI format 2_0 is used to transmit dynamic slot format information (e.g., dynamic SFI) to the terminal, and DCI format 2_1 is used to transmit downlink pre-emption information to the terminal. DCI format 2_0 and / or DCI format 2_1 are transmitted to the terminals within the corresponding group via the Group Common PDCCH, which is the PDCCH transmitted to the terminals defined in one group.

[0053] DCI format 0_0 and DCI format 1_0 are called fallback DCI formats, and DCI format 0_1 and DCI format 1_1 are called non-fallback DCI formats. For the fallback DCI formats, the DCI size / field configuration is maintained similarly regardless of the terminal settings. In contrast, for the non-fallback DCI formats, the DCI size / field configuration varies according to the terminal settings.

[0054] The PDSCH carries downlink data (e.g., DL-SCH transport block, DL-SCH TB), and modulation methods such as QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, 256QAM are applied. The TB is encoded to generate a codeword. The PDSCH carries a maximum of two codewords. For each codeword, scrambling and modulation mapping are performed, and the modulation symbols generated from each codeword are mapped to one or more layers. Each layer is mapped to a resource together with the DMRS (Demodulation Reference Signal) to generate an OFDM symbol signal, which is transmitted by the corresponding antenna port.

[0055] The PUCCH carries UCI (Uplink Control Information). The UCI includes the following.

[0056] - SR (Scheduling Request): Information used to request UL-SCH resources.

[0057] - HARQ-ACK: A response to the downlink data packet (e.g., codeword) on the PDSCH. It indicates whether the downlink data packet has been successfully received. One bit of HARQ-ACK is transmitted as a response to a single codeword, and two bits of HARQ-ACK are transmitted as a response to two codewords. The HARQ-ACK response includes positive ACK (simply, ACK), negative ACK (hereinafter, NACK), DTX (Discontinuous Transmission), or NACK / DTX. Here, the term HARQ-ACK is used in the same meaning as HARQ ACK / NACK, ACK / NACK.

[0058] - CSI (Channel State Information): Feedback information for the downlink channel. MIMO (Multiple Input Multiple Output)-related feedback information includes RI (Rank Indicator) and PMI (Precoding Matrix Indicator).

[0059] Table 5 illustrates PUCCH formats. Depending on the PUCCH transmission length, it can be classified into Short PUCCH (formats 0, 2) and Long PUCCH (formats 1, 3, 4).

[0060]

Table 5

[0061] PUCCH format 0 carries UCI with a maximum size of 2 bits and is mapped and transmitted based on a sequence. Specifically, the terminal transmits a specific UCI to the base station by transmitting one of a plurality of sequences via a PUCCH that is PUCCH format 0. The terminal transmits a PUCCH that is PUCCH format 0 within the PUCCH resource for the SR setting corresponding only when transmitting a positive SR.

[0062] PUCCH format 1 carries UCI with a maximum size of 2 bits, and the modulation symbols are spread by an orthogonal cover code (OCC) in the time domain (set differently depending on the presence or absence of frequency hopping). The DMRS is transmitted in the symbols where the modulation symbols are not transmitted (i.e., transmitted by time division multiplexing (TDM)).

[0063] PUCCH format 2 carries UCI with a bit size larger than 2 bits, and the modulation symbols are transmitted by being DMRS and FDM (Frequency Division Multiplexing). DM-RS is located at symbol indexes #1, #4, #7, and #10 within a resource block with a density of 1 / 3. A PN (Pseudo Noise) sequence is used for the DM_RS sequence. Frequency hopping can be activated for the 2-symbol PUCCH format 2.

[0064] PUCCH format 3 does not perform terminal multiplexing within the same physical resource block and carries UCI with a bit size larger than 2 bits. That is, the PUCCH resources of PUCCH format 3 do not include an orthogonal cover code. The modulation symbols are transmitted by being DMRS and TDM (Time Division Multiplexing).

[0065] PUCCH format 4 supports multiplexing up to 4 terminals within the same physical resource block and carries UCI with a bit size larger than 2 bits. That is, the PUCCH resources of PUCCH format 3 include an orthogonal cover code. The modulation symbols are transmitted by being DMRS and TDM (Time Division Multiplexing).

[0066] For a terminal, at least one of the one or more configured cells can be configured for PUCCH transmission. At least the Primary Cell can be configured as a cell for PUCCH transmission. Based on at least one cell for which PUCCH transmission is configured, at least one PUCCH cell group is configured for the terminal, and each PUCCH cell group includes one or more cells. A PUCCH cell group is also simply called a PUCCH group. PUCCH transmission is configured not only for the Primary Cell but also for SCell. The Primary Cell belongs to the primary PUCCH group, and the PUCCH-SCell for which PUCCH transmission is configured belongs to the secondary PUCCH group. For the cells belonging to the primary PUCCH group, the PUCCH on the Primary Cell is used, and for the cells belonging to the secondary PUCCH group, the PUCCH on the PUCCH-SCell is used.

[0067] The PUSCH carries uplink data (e.g., UL-SCH transport block, UL-SCH TB) and / or uplink control information (UCI), and is transmitted based on the CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) waveform or the DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing) waveform. When the PUSCH is transmitted based on the DFT-s-OFDM waveform, the terminal applies transform precoding to transmit the PUSCH. As an example, when transform precoding is not possible (e.g., transform precoding is disabled), the terminal transmits the PUSCH based on the CP-OFDM waveform, and when transform precoding is possible (e.g., transform precoding is enabled), the terminal transmits the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform. PUSCH transmission is dynamically scheduled by the UL grant in the DCI, or is semi-statically scheduled (configured grant) based on higher layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)). PUSCH transmission is performed on a codebook basis or a non-codebook basis.

[0068] Figure 5 is a diagram illustrating the ACK / NACK transmission process. Referring to Figure 5, the terminal can detect the PDCCH in slot #n. Here, the PDCCH contains downlink scheduling information (e.g., DCI format 1_0, 1_1), and the PDCCH indicates the DL assignment-to-PDSCH offset (K0) and the PDSCH-HARQ-ACK reporting offset (K1). For example, DCI format 1_0, 1_1 contains the following information.

[0069] - Frequency domain resource assignment: Indicates the set of RBs allocated to the PDSCH.

[0070] - Time domain resource assignment: Indicates K0 (e.g., slot offset), the start position of the PDSCH within slot #n + K0 (e.g., OFDM symbol index), and the length of the PDSCH (e.g., number of OFDM symbols).

[0071] - PDSCH-to-HARQ_feedback timing indicator: Indicates K1.

[0072] - HARQ process number (4 bits): Indicates the HARQ process ID (Identity) for the data (e.g., PDSCH, TB).

[0073] - PUCCH resource indicator (PRI): Indicates the PUCCH resource used for UCI transmission from among a plurality of PUCCH resources within the PUCCH resource set.

[0074] Thereafter, after the terminal receives the PDSCH from slot #(n + K0) according to the scheduling information of slot #n, when the reception of the PDSCH ends at slot #n1 (where n + K0 ≤ n1), the terminal transmits UCI via the PUCCH at slot #(n1 + K1). Here, the UCI includes a HARQ-ACK response for the PDSCH. In FIG. 5, for convenience, it is assumed that the SCS for the PDSCH and the SCS for the PUCCH are the same and that slot #n1 = slot #n + K0, but the present invention is not limited thereto. When the SCSs are different from each other, K1 is indicated / interpreted based on the SCS of the PUCCH.

[0075] When the PDSCH is configured to transmit a maximum of one TB, the HARQ-ACK response is configured with 1 bit. When the PDSCH is configured to transmit a maximum of two TBs, the HARQ-ACK response is configured with 2 bits if spatial bundling is not configured, and 1 bit if spatial bundling is configured. When the transmission time of HARQ-ACK for multiple PDSCHs is specified as slot #(n + K1), the UCI transmitted in slot #(n + K1) includes the HARQ-ACK responses for multiple PDSCHs.

[0076] Whether or not the terminal should perform spatial bundling for the HARQ-ACK response can be configured (e.g., RRC / higher layer signaling) for each cell group. As an example, spatial bundling is configured individually for each of the HARQ-ACK responses transmitted via the PUCCH and / or the HARQ-ACK responses transmitted via the PUSCH.

[0077] Spatial bundling is supported when the maximum number of TBs (or codewords) that can be received at once (or scheduled by one DCI) in the serving cell is two (or more than two) (e.g., when the higher layer parameter maxNrofCodeWordsScheduledByDCI corresponds to 2-TB). On the other hand, for 2-TB transmission, more than four layers are used, and for 1-TB transmission, a maximum of four layers are used. As a result, when spatial bundling is configured for the cell group, spatial bundling is performed for the serving cells in the cell group where more than four layers can be scheduled. On the serving cell, a terminal attempting to transmit the HARQ-ACK response by spatial bundling can generate the HARQ-ACK response by performing a logical AND operation (bit-wise) on the A / N bits for multiple TBs.

[0078] For example, when assuming that the terminal receives DCI scheduling 2-TB and receives 2-TB via PDSCH based on the DCI, a terminal performing spatial bundling can generate a single A / N bit by logically ANDing the first A / N bit for the first TB and the second A / N bit for the second TB. As a result, when both the first TB and the second TB are ACK, the terminal reports the ACK bit value to the base station, and when any one of the TBs is NACK, the terminal reports the NACK bit value to the base station.

[0079] For example, when actually only 1-TB is scheduled on a serving cell configured to be capable of receiving 2-TB, the terminal can generate a single A / N bit by logically ANDing the A / N bit for the 1-TB and the bit value 1. As a result, the terminal reports the A / N bit for the 1-TB to the base station as it is.

[0080] There are multiple parallel DL HARQ processes for DL transmission in the base station / terminal. The multiple parallel HARQ processes enable continuous DL transmission while waiting for HARQ feedback on the success or failure of previous DL transmissions. Each HARQ process is associated with a HARQ buffer in the MAC (Medium Access Control) layer. Each DL HARQ process manages state variables such as the number of transmissions of the MAC PDU (Physical Data Block) in the buffer, the HARQ feedback for the MAC PDU in the buffer, and the current redundancy version. Each HARQ process is distinguished by a HARQ process ID.

[0081] Figure 6 illustrates the PUSCH transmission process. Referring to Figure 6, the terminal can detect the PDCCH in slot #n. Here, the PDCCH contains uplink scheduling information (e.g., DCI format 0_0, 0_1). DCI formats 0_0 and 0_1 include the following information.

[0082] - Frequency domain resource assignment: Indicates the set of RBs allocated to PUSCH.

[0083] - Time domain resource assignment: Indicates the slot offset K2, the start position (e.g., symbol index) and length (e.g., number of OFDM symbols) of PUSCH within the slot. The start symbol and length are indicated by SLIV (Start and Length Indicator Value), or each is indicated.

[0084] Hereafter, the terminal can transmit PUSCH in slot #(n + K2) according to the scheduling information of slot #n. Here, PUSCH includes UL-SCH TB.

[0085] QCL (quasi-co location)

[0086] Two antenna ports are quasi co-located if the channel properties of one antenna port can be inferred from the channels of other antenna ports. The channel properties can include one or more of Delay spread, Doppler spread, Frequency / Doppler shift, Average received power, Received Timing / average delay, and Spatial RX parameter.

[0087] A list of multiple TCI-State configurations is set for the terminal by the higher layer parameter PDSCH-Config. Each TCI-State is associated with the QCL configuration parameters between one or two DL reference signals and the DM-RS ports of PDSCH. QCL includes qcl-Type1 for the first DL RS and qcl-Type2 for the second DL RS. The QCL type corresponds to any one of the following.

[0088] - 'QCL-TypeA': {Doppler shift, Doppler spread, average delay, delay spread}

[0089] - 'QCL-TypeB': {Doppler shift, Doppler spread}

[0090] - 'QCL-TypeC': {Doppler shift, average delay}

[0091] - 'QCL-TypeD': {Spatial Rx parameter}

[0092] Beam Management (BM)

[0093] The BM process is a process for obtaining and maintaining a set of BSs (or transmission and reception points (TRPs)) and / or UE beams that can be used for downlink (DL) and uplink (UL) transmission / reception, and includes the following processes and terms.

[0094] - Beam measurement: The operation where a BS or UE measures the characteristics of a received beamforming signal.

[0095] - Beam determination: The operation where a BS or UE selects its own transmission beam (Tx beam) / reception beam (Rx beam).

[0096] - Beam sweeping: The operation of covering a spatial domain using transmission and / or reception beams during a certain time interval in a predetermined manner.

[0097] - Beam report: The operation where a UE reports information on a beamformed signal based on beam measurement.

[0098] The BM process is classified into (1) a DL BM process using SSB or CSI-RS and (2) a UL BM process using SRS (Sounding reference signal). Each BM process includes Tx beam sweeping for determining a Tx beam and Rx beam sweeping for determining an Rx beam.

[0099] At this time, the DL BM process includes (1) transmission of beamformed DL RS (e.g., CSI-RS or SSB) by the BS and (2) beam reporting by the UE.

[0100] Here, the beam report includes a preferred DL RS ID and the corresponding reference signal received power (RSRP). The DL RS ID is an SSBRI (SSB Resource Indicator) or a CRI (CSI-RS Resource Indicator).

[0101] M-TRP (multi-transmission and reception point) transmission in NR Release 16

[0102] In NR standard release 16, S-DCI-based M-TRP PDSCH and M-DCI-based M-TRP PDSCH transmission methods are supported.

[0103] - S-DCI-based M-TRP PDSCH in NR standard release 16

[0104] The M-TRP PDSCH transmission based on S-DCI is further segmented, and one of the SDM / FDM / TDM methods is used. In the case of the SDM method, one TB is transmitted in multiple layers, but the layers belonging to different DM-RS CDM groups are transmitted with different transmission beams (Tx beams), that is, with different QCL RSs or different TCI states. Thereby, the number of layers can be increased compared with the conventional S-TRP transmission method, and the transmission capacity can be improved. Also, when one TB is transmitted in multiple layers, some layers are transmitted to TRP1 and the other layers are transmitted to TRP2, so that the channel reliability can be improved by the diversity gain.

[0105] In the case of the FDM method, two schemes, scheme 2a and scheme 2b, are supported. Scheme 2a is a method in which one TB is transmitted in multiple RBs, but the RBs belonging to different RB groups are transmitted with different transmission beams (that is, QCL RS or TCI state). Scheme 2b is a method in which the same TB is transmitted to different RB groups, but the RBs belonging to different RB groups are transmitted with different transmission beams (that is, QCL RS or TCI state).

[0106] In the case of TDM, two schemes, scheme 3 and scheme 4, are supported. Scheme 4 is inter-slot TDM, in which the same TB is repeatedly transmitted in multiple slots, but the slots belonging to different slot groups are transmitted with different transmission beams (that is, QCL RS or TCI state). Different from this, Scheme 4 is intra-slot TDM, in which the same TB is repeatedly transmitted in multiple OFDM symbol groups, but some OFDM symbol groups and other OFDM symbol groups are transmitted with different transmission beams (that is, QCL RS or TCI state).

[0107] - M-TRP PDSCH Based on M-DCI in NR Standard Release 16

[0108] The M-TRP PDSCH transmission based on M-DCI is a method where each TRP schedules and transmits the PDSCH by DCI. That is, TRP 1 transmits PDSCH 1 by DCI 1, and TRP 2 transmits PDSCH 2 by DCI 2. When PDSCH 1 and PDSCH 2 overlap in the same frequency-time resource, two PDSCHs are received for the same RE, so the resource efficiency is increased and the transmission capacity is increased.

[0109] For this reason, in NR Release 16, a CORESET pool, which is a group of multiple CORESETs, is introduced. TRP 1 transmits the PDCCH by the CORESET belonging to CORESET pool 0, and TRP 1 also transmits the PDSCH scheduled by the PDCCH. TRP 2 transmits the PDCCH by the CORESET belonging to CORESET pool 1, and TRP 2 also transmits the PDSCH scheduled by the PDCCH. For PUSCH, a specific TRP can also schedule the PUSCH transmission to the UE by the CORESET belonging to each CORESET pool. In the case of PUCCH, some PUCCH resources are scheduled by TRP 1 to receive UCI, and other PUCCH resources are scheduled by TRP 2 to receive UCI. In the case of PUSCH or PUCCH, since the channels scheduled or used by each TRP are TDM with each other and no overlap occurs, an increase in transmission capacity cannot be expected, but the UE can transmit independent PUSCH / PUCCH for each of TRP 1 and TRP 2.

[0110] M-TRP transmission in NR Release 17

[0111] In NR standard release 17, M-TRP PDCCH repeated transmission, M-TRP PDCCH / PDSCH SFN transmission, S-DCI-based M-TRP PUSCH repeated transmission, and single PUCCH resource-based M-TRP PUCCH repeated transmission are supported.

[0112] All of these transmission techniques are URLLC-targeted enhancements for increasing reliability, where the same content (i.e., DCI, UL TB, or UCI) is repeatedly transmitted. In the case of M-TRP PDCCH repeated transmission, it is transmitted repeatedly through TDM or FDM. M-TRP PDCCH / PDSCH SFN is repeatedly transmitted on the same time / frequency / layer. S-DCI-based M-TRP PUSCH repeated transmission is through TDM, and single PUCCH resource-based M-TRP PUCCH repeated transmission is transmitted repeatedly through TDM.

[0113] - S-DCI-based M-TRP PDCCH repeated transmission in NR standard release 17

[0114] In NR standard release 17, for M-TRP PDCCH repeated transmission, multiple CORESETs with different TCI states (i.e., different QCL RS) are configured for the UE, and a plurality of SS (Search Space) sets associated with each of the CORESETs are configured. The base station indicates / configures to the UE that the SS set associated with one CORESET and the SS set associated with other CORESETs are linked for repeated transmission, so that the UE can know that the PDCCH candidates of that SS set are repeatedly transmitted.

[0115] For example, CORESET #0 and CORESET #1, which are two CORESETs, are set for the UE. Each of CORESET #0 and CORESET #1 is connected to SS set #0, 1, and SS set #0 and SS set #1 are linked. The UE finds that the PDCCH candidates of SS set #0 and the PDCCH candidates of SS set #1 repeatedly transmit the same DCI, and it can be seen that they are a pair set according to a predetermined rule for the specific PDCCH candidates of SS set #0 and the specific PDCCH candidates of SS set #1 to repeatedly transmit the same DCI. These two PDCCH candidates are called linked PDCCH candidates. If the UE accurately receives any one of the two PDCCH candidates, it can successfully decode the DCI. However, when receiving the PDCCH candidate of SS set #0, the QCL RS (i.e., the downlink beam) in the TCI state of CORESET #0 connected to SS set #0 is used, and when receiving the PDCCH candidate of SS set #1, the QCL RS (i.e., the downlink beam) in the TCI state of CORESET #1 connected to SS set #1 is used, so that the linked PDCCH candidates are received with different beams from each other.

[0116] - M-TRP SFN PDCCH in NR standard release 17

[0117] As a special case of M-TRP PDCCH repeated transmission, multiple TRPs can repeatedly transmit the same DCI by the same time / frequency / DM-RS port, which is called SFN PDCCH transmission. However, for SFN PDCCH transmission, instead of setting multiple CORESETs with different TCI states, the base station sets multiple TCI states in one CORESET. When the UE receives PDCCH candidates through the SS set connected to the one CORESET, it uses all the multiple TCI states to perform channel estimation of PDCCH DM-RS and attempts decoding.

[0118] - M-TRP SFN PDSCH in NR Standard Release 17

[0119] When the M-TRP PDSCH is repeatedly transmitted, the two TRPs repeatedly transmit the channel on different resources. However, as a special case, even when the resources used by the two TRPs are the same, that is, when the same channel is repeatedly transmitted by the same frequency, time, layer (or DM-RS port), the reliability of the channel can be improved. In this case, the same channel that is repeatedly transmitted is not resource-segmented and is received combined in the air, so it is recognized as one channel at the receiving end. In the NR standard, for PDSCH SFN transmission, two downlink TCI states for PDSCH DM-RS reception are set.

[0120] - Repeated Transmission of M-TRP PUSCH Based on S-DCI in NR Standard Release 17

[0121] For S-DCI-based M-TRP PUSCH transmission by the base station, two SRS sets are configured for the UE, and each SRS set is used to indicate the uplink transmission port and uplink beam / QCL information towards TRP #1 and TRP #2. Also, the base station can indicate SRS resource for each SRS set by two SRI fields in one DCI and can indicate up to two power control (PC) parameter sets. For example, the first SRI field can indicate the SRS resource and PC parameter set defined in set 0, and the second SRI field can indicate the SRS resource and PC parameter set defined in set 1.

[0122] The UE is instructed by the first SRI field with the uplink transmission port, PC parameter set, and uplink beam / QCL information towards TRP #1, and thereby performs PUSCH transmission at the TO corresponding to SRS set #0. Similarly, the UE is instructed by the second SRI field with the uplink transmission port, PC parameter set, and uplink beam / QCL information towards TRP #2, and thereby performs PUSCH transmission at the TO corresponding to SRS set #1.

[0123] - M-TRP PUCCH repeated transmission based on a single PUCCH resource in NR standard release 17

[0124] For M-TRP PUCCH transmission based on a single PUCCH resource, the base station activates / configures two spatial relation infos for the UE in a single PUCCH resource. When UL UCI is transmitted by the UE using the PUCCH resource, each spatial relation info is used to indicate the spatial relation info towards TRP #1 and TRP #2.

[0125] For example, according to the value indicated by the first spatial relation info, the UE is indicated with the transmission beam / PC parameter towards TRP #1, and uses this information to perform PUCCH transmission at the TO corresponding to TRP #1. Similarly, according to the value indicated by the second spatial relation info, the UE is indicated with the transmission beam / PC parameter towards TRP #2, and uses this information to perform PUCCH transmission at the TO corresponding to TRP #2.

[0126] In the Rel 17 standardization meeting, the setting method was enhanced so that two spatial relation information are set for PUCCH resources for M-TRP PUCCH repeated transmission. That is, when PC parameters are set for each spatial relation information, a spatial relation (RS) can be set. As a result, PC information and spatial relation RS information corresponding to two TRPs can be set by two spatial relation information, and the UE transmits on the PUCCH using the first spatial relation information at TO 1 and transmits the same UCI (i.e., CSI, ACKNAK, SR) on the PUCCH using the second spatial relation information at TO 2.

[0127] Hereinafter, a PUCCH resource with two spatial relation information set is referred to as an M-TRP PUCCH resource, and a PUCCH resource with two spatial relation information set is referred to as an S-TRP PUCCH resource.

[0128] Meaning of TCI state / beam indication

[0129] When receiving data / DCI / UCI for any frequency / time / spatial resource, the meaning of using or mapping a specific TCI state (or, TCI) means that in the case of the downlink, estimating the channel from the DM-RS using the QCL type and QCL RS indicated by the downlink TCI state in that frequency / time / spatial resource and receiving / demodulating the data / DCI with the estimated channel.

[0130] In the case of the uplink, it means transmitting / modulating the DM-RS and data / UCI using the transmission beam and / or transmission power indicated by the uplink TCI state in that frequency / time / spatial resource.

[0131] The uplink TCI state includes the transmission beam or transmission power information of the UE. Instead of the TCI state, other parameters such as spatial relation information may be set for the UE.

[0132] The uplink TCI state may be directly indicated in the DCI that transmits the uplink grant, or may mean the spatial relation information of the SRS resource indicated by the SRI field of the UL grant DCI. Alternatively, it may mean the open-loop transmission power control parameters concatenated to the value indicated by the SRI field of the UL grant DCI. Alternatively, the uplink TCI may be indicated using the DL grant DCI.

[0133] For the convenience of description, the proposed method of the present invention assumes cooperative transmission / reception between two TRPs. However, it can be extended and applied to an environment with three or more multiple TRPs, and can also be extended and applied to a multiple panel environment. Different TRPs are recognized by the UE as different TCI states. When the UE transmits and receives data / DCI / UCI using TCI state 1, it means transmitting and receiving data / DCI / UCI with TRP 1.

[0134] In the present invention, TO means each channel transmitted at different times when multiple channels are TDM, each channel transmitted at different frequencies / RBs when FDM, and each channel transmitted at different layers / beams / DM-RS ports when SDM. One TCI state is mapped to each TO. When the same channel is repeatedly transmitted, a complete DCI / data / UCI is transmitted in one TO, and the receiving end receives multiple TOs to improve the reception success rate.

[0135] STxMP (Simultaneous Transmission across Multi-Panel)

[0136] In NR Release 18, methods for a UE to transmit multiple homogeneous channels / reference signals simultaneously or multiple heterogeneous channels / reference signals simultaneously are being discussed. In the case of a conventional UE, the operation of transmitting multiple channels / reference signals at the same time is restricted. For example, for uplink beam measurement, multiple SRS resources of different SRS sets can be transmitted simultaneously, but multiple PUSCHs cannot be transmitted simultaneously.

[0137] However, in the case of an advanced terminal discussed in NR Release 18, such restrictions are relaxed, and multiple channels or RSs can be transmitted simultaneously using multiple transmission panels, and this UE is called an STxMP UE. For example, two PUSCHs corresponding to two uplink TBs are scheduled in the same RE, and for the transmission of PUSCH 1 and PUSCH 2, spatial relation RS 1 and PC (power control) parameter set 1 (i.e., uplink TCI state 1) and spatial relation RS2 and PC parameter set 2 (i.e., uplink TCI state 2) are set respectively. The UE transmits PUSCH 1 using panel 1 corresponding to the uplink TCI state 1 and simultaneously transmits PUSCH 2 using panel 2 corresponding to the uplink TCI state 2.

[0138] When the base station schedules a PUSCH by DCI, it can indicate whether to transmit the PUSCH in STxMP mode, transmit it with a single panel, or transmit the M-TRP PUSCH repeatedly, etc. Of course, the UE needs to have the STxMP capability, and the STxMP mode needs to be in a usable state in advance, such as by RRC signaling. For this purpose, the conventional SRS resource set indicator field is redefined and used, or a new DCI field is introduced.

[0139] Relationship between PT-RS and DM-RS during STxMP PUSCH transmission

[0140] The following proposes a method for associating PT-RS and DM-RS for each panel when transmitting SDM STxMP PUSCH.

[0141] In the case of the above-mentioned SDM STxMP, the rank to be transmitted by each panel (i.e., the transmission panel of the UE) is indicated by DCI (for example, panel 1 is indicated by RI1, and panel 2 is indicated by RI2), and the sum of the ranks of the two panels (RI1 + RI2) is determined as the rank of the PUSCH. For example, when RI1 is indicated for panel 1 of the UE and RI2 is indicated for panel 2, the rank of the PUSCH is determined by RI1 + RI2, which is the sum of the ranks of the two panels.

[0142] Also, the DM-RS port corresponding to (RI1 + RI2) is indicated by the DM-RS port indicator field in the DCI. To indicate SDM STxMP PUSCH transmission, the 2-bit SRS resource set indicator is set to 10 or 11, and SDM STxMP PUSCH is enabled by another indicator or by a predetermined condition.

[0143] If the maximum number of PT-RS is set to 2 by RRC signaling, when transmitting SDM STxMP PUSCH, the two PT-RS are transmitted for each of the two panels. That is, the base station indicates one of the DM-RS ports transmitted in panel 1 to associate the PT-RS and the DM-RS port, and indicates one of the DM-RS ports transmitted in panel 2 to associate the DM-RS port. The present invention proposes a method for associating PT-RS and DM-RS for each panel.

[0144] Such a related method of DM-RS ports for each panel to PT-RS ports has been supported in the past. Specifically, the indicated DM-RS ports are divided into two groups, and one PT-RS and one DM-RS port are associated with each group. Here, each group means the DM-RS ports transmitted by each panel. However, in the conventional case, only the method in which one PUSCH transmission occasion is scheduled by a single CB (Codebook Based) SRS resource set / single NCB (Non Codebook Based) SRS resource set / single TPMI field / single SRI field is effective. In the case of the M-TRP PUSCH transmission method, two SRS resource sets / two fields are used for PUSCH scheduling. Since this is used for scheduling different PUSCH transmission occasions, as a result, in the M-TRP PUSCH transmission method as well, each PUSCH transmission occasion is scheduled by a single CB SRS resource set / single NCB SRS resource set / single TPMI field / single SRI field.

[0145] When one PUSCH transmission occasion is scheduled by a multiple CB SRS resource set / multiple NCB SRS resource set / multiple TPMI field / multiple SRI field for SDM STxMP PUSCH, the conventional related method of DM-RS ports to PT-RS ports is not effective. For example, in CB PUSCH, SRS resource 1 and SRS resource 2 are set as two 2-port SRS resources from two SRS resource sets by two SRI fields, and using two TPMI fields, for panel 1, RI1 = 1, precoder 1 =

[0011] T , for panel 2, RI2 = 1, precoder 2 = [1 -1] TAssume that it is set. In this case, the DM-RS ports corresponding to the precoder 1 and the DM-RS ports corresponding to the precoder 2 cannot be grouped by the conventional method. The conventional grouping determines the layer transmitted using the PUSCH antenna ports 1000 and 1002 into one group, and the layer transmitted using the PUSCH antenna ports 1001 and 1003 into another group, but the layers corresponding to the precoder 1 and the precoder 2 cannot be grouped in such a way. In order to group by the conventional method, a further assumption is required that each element of the two-port SRS resource 1 or the precoder 1 is mapped to the PUSCH antenna ports 1000 and 1002, and each element of the two-port SRS resource 2 (or the precoder 2) is mapped to the PUSCH antenna ports 1001 and 1003.

[0146] As another example, in the case of CB PUSCH, SRS resources 1 to 4 are set as four two-port SRS resources from four SRS resource sets by four SRI fields, and using four TPMI fields, RI1 = 1 for panel 1, precoder 1 =

[0011] T , RI2 = 1 for panel 2, precoder 2 = [1 -1] T , RI3 = 1 for panel 3, precoder 3 = [1 j] T , RI4 = 1 for panel 4, precoder 4 = [1 -1] TAssume that it is set. In this case, in order to group the DM-RS ports corresponding to precoders 1 to 4, an additional assumption is required that the two-port SRS resource 1 (or each element of precoder 1) is mapped to PUSCH antenna ports 1000 and 1004, the two-port SRS resource 2 (or each element of precoder 2) is mapped to PUSCH antenna ports 1001 and 1005, the two-port SRS resource 3 (or each element of precoder 3) is mapped to PUSCH antenna ports 1002 and 1006, and the two-port SRS resource 4 (or each element of precoder 4) is mapped to PUSCH antenna ports 1003 and 1007. Also, determine that the layers transmitted using PUSCH antenna ports 1000 and 1004 are in one group, the layers transmitted using PUSCH antenna ports 1001 and 1005 are in another group, the layers transmitted using PUSCH antenna ports 1002 and 1006 are in one group, and the layers transmitted using PUSCH antenna ports 1003 and 1007 are in another group.

[0147] Thus, after grouping layer / DM-RS ports panel by panel, it is necessary to increase the PT-RS field size in order to associate four PT-RS ports with DM-RS for each panel. For example, using a 4-bit sized PT-RS to DM-RS association field, the first field of the field is used for the PT-RS to DM-RS association of panel 1, the second field is used for the PT-RS to DM-RS association of panel 2, the third field is used for the PT-RS to DM-RS association of panel 3, and the fourth field is used for the PT-RS to DM-RS association of panel 4. Alternatively, when still only supporting two PT-RS ports, a 2-bit indicator is used to select one DM-RS port in groups 1 and 2 to associate with PT-RS port 0, and another 2-bit indicator is used to select one DM-RS port in groups 3 and 4 to associate with PT-RS port 1. Alternatively, when still only supporting two PT-RS ports, a 1-bit indicator is used to select one DM-RS port in a specific group (e.g., group 1) to associate with PT-RS port 0, and another 1-bit indicator is used to select one DM-RS port in another group (e.g., group 2) to associate with PT-RS port 1.

[0148] As another example, in CB PUSCH, two SRS resources, SRS resource 1 and SRS resource 2, are configured as two 4-port SRS resources from two SRS resource sets by two SRI fields, and two TPMI fields are used, where RI1 = 1 and precoder 1 = [1 1 1 1]T for panel 1, and RI2 = 1 and precoder 2 = [1 1 -1 -1] for panel 2 TAssume that it is set. In this case, the DM-RS ports corresponding to the precoder 1 and the DM-RS ports corresponding to the precoder 2 cannot be grouped by the conventional method. The conventional grouping determines the layers transmitted using the PUSCH antenna ports 1000 and 1002 into one group, and the layers transmitted using the PUSCH antenna ports 1001 and 1003 into another group, but the layers corresponding to the precoder 1 and the precoder 2 cannot be grouped in such a way. In order to group by the conventional method, an additional assumption is required that the 4-port SRS resource 1 (or each element of the precoder 1) is mapped to the PUSCH antenna ports 1000, 1002, 1004, and 1006, and the 4-port SRS resource 2 (or each element of the precoder 2) is mapped to the PUSCH antenna ports 1001, 1003, 1005, and 1007. Also, determine the layers transmitted using the PUSCH antenna ports 1000, 1002, 1004, and 1006 into one group, and determine the layers transmitted using the PUSCH antenna ports 1001, 1003, 1005, and 1007 into another group.

[0149] As another example, in NCB PUSCH, SRS resources can be selected in SRS resource set 0 and SRS resource set 1 respectively by two SRI fields. At this time, the DM-RS ports corresponding to the SRS resources selected in SRS resource set 0 (that is, the DM-RS ports generated by applying the same precoding as the precoding already applied to each SRS resource) can be assumed as the DM-RS ports of panel 1, and the DM-RS ports corresponding to the SRS resources selected in SRS resource set 1 can be assumed as the DM-RS ports of panel 2. When n1 SRS resources are selected in SRS resource set 0, the DM-RS ports corresponding to this SRS resource are the n1 DM-RS ports with lower indices among the DM-RS ports indicated by the DM-RS port indicator (for example, n1 + n2 DM-RS ports). When n2 SRS resources are selected in SRS resource set 1, the DM-RS ports corresponding to this SRS resource are the other n2 DM-RS ports among the DM-RS ports indicated by the DM-RS port indicator.

[0150] As other methods for grouping layers / DM-RS ports for each panel, the following matters can be considered.

[0151] The DM-RS port indicator field can be extended from the conventional one to two, and the DM-RS ports used by each panel can be indicated by each field.

[0152] Alternatively, although one field is used, the indicated DM-RS ports can be divided into the DM-RS ports of panel 1 and the DM-RS ports of panel 2 using a predetermined rule. For example, the DM-RS ports belonging to the first CDM group of the CDM group to which the indicated DM-RS ports belong are defined as the DM-RS ports corresponding to panel 1, and the DM-RS ports belonging to the second CDM group are defined as the DM-RS ports corresponding to panel 2.

[0153] As another example, among the indicated DM-RS ports, one RI1 DM-RS port that was previously indicated (or has a lower index) is defined as the DM-RS port corresponding to panel 1, and the other DM-RS ports are defined as the DM-RS ports corresponding to panel 2.

[0154] After grouping the layers / DM-RS ports for each panel, according to the following proposed method, each of the two PT-RS can be associated with a DM-RS port using a 2-bit size PT-RS to DM-RS related field.

[0155] 1) When RI1 = 1 and RI2 = 1, since each panel transmits only one layer, each of PT-RS ports 0 and 1 is associated with the DM-RS ports transmitted by panels 1 and 2.

[0156] 2) When RI1 = 1 and RI2 = 2, PT-RS port 0 is associated with one DM-RS port transmitted by panel 1. PT-RS port 1 is associated with one of the two DM-RS ports transmitted by panel 2 and is indicated by the PT-RS to DM-RS related field in the DCI (only 1-bit MSB or 1-bit LSB of the 2-bit size field is used).

[0157] 3) When RI1 = 2 and RI2 = 1, PT-RS port 1 is associated with one DM-RS port transmitted by panel 2. PT-RS port 0 is associated with one of the two DM-RS ports transmitted by panel 1 and is indicated by the PT-RS to DM-RS related field in the DCI (only 1-bit MSB or 1-bit LSB of the 2-bit size field is used).

[0158] 4) When RI1 = 2 and RI2 = 2, PT-RS port 0 is associated with one of the two DM-RS ports transmitted by panel 1, and is indicated by the PT-RS to DM-RS association field in the DCI (only 1-bit MSB or 1-bit LSB of the 2-bit size field is used). PT-RS port 1 is associated with one of the two DM-RS ports transmitted by panel 2, and is indicated by the PT-RS to DM-RS association field in the DCI (only 1-bit MSB or 1-bit LSB of the 2-bit size field is used).

[0159] 5) When RI1 = 1 and RI2 = 3, PT-RS port 0 is associated with one DM-RS port transmitted by panel 1. PT-RS port 1 is associated with one of the three DM-RS ports transmitted by panel 2, and is indicated by the PT-RS to DM-RS association field in the DCI (both 2 bits are used).

[0160] 6) When RI1 = 3 and RI2 = 1, PT-RS port 1 is associated with one DM-RS port transmitted by panel 2. PT-RS port 0 is associated with one of the three DM-RS ports transmitted by panel 1, and is indicated by the PT-RS to DM-RS association field in the DCI (both 2 bits are used).

[0161] In the above-mentioned proposal, the 2-bit PT-RS to DM-RS association field has different interpretations according to the combination of (RI1, RI2). That is, when (1, 2), (2, 1), (2, 2), 1 bit is used for each PT-RS for the indication of DM-RS association, but when (1, 3), (3, 1), both 2 bits are used for the PT-RS indication for the panel transmitting 3 layers.

[0162] Even if the maximum number of PT-RSs is set to 2, when PUSCH transmission is performed using a single panel, the number of PT-RSs is set to 1. For example, when the SRS resource set indicator is set to 00 or 01, instead of STxMP transmission, single panel transmission can be fallback, and in this case, the number of PT-RSs is set to 1, and one of the indicated DM-RS ports and the PT-RS are associated by the PT-RS to DM-RS related field.

[0163] For compatibility with conventional M-TRP PUSCH repeated transmission, more specifically, M-TRP PUSCH repeated transmission in 3GPP NR standard release 17, when the number of repetitions is 1, the present invention is applied, and when the number of repetitions is 2 or more, the PT-RS to DM-RS association can be indicated by the 3GPP NR standard release 17 method.

[0164] Alternatively, to apply both STxMP that performs PUSCH transmission using two panels in one transmission opportunity (TO) and TDM repeated transmission in which the same TB is transmitted over multiple TOs, a new indicator is defined. When the indicator is 1, two SRS resource sets are mapped to a single TO, and this is repeatedly applied to multiple TOs to perform PUSCH transmission to perform repeated transmission. When the indicator is 0, only one SRS resource set is mapped to one TO (that is, the M-TRP PUSCH transmission method of 3GPP NR standard release 17 is applied). Furthermore, four SRI / TPMIs are indicated targeting 4TRP, and two of the SRI / TPMIs are paired so that two pairs are indicated, and the pairs can be alternately applied to each TO.

[0165] To dynamically instruct the UE by the base station to use one of the SDM STxMP and other STxMPs (i.e., SFN STxMP, FDM STxMP), or to dynamically instruct the UE by the base station to use one of the SDM STxMP and the conventional M-TRP repeated transmission, the rank of the PUSCH can be used. Since the PUSCH rank needs to be set to 2 or more for SDM STxMP, the SDM STxMP and other STxMPs can be distinguished according to whether the rank is 2 or more. For this purpose, there is a restriction that the other STxMPs must be transmitted only with rank 1.

[0166] On the other hand, when the dynamic switching between the SDM STxMP and the SFN STxMP is possible by the MAC CE or DCI, the following method can be considered.

[0167] When the maximum number of PT-RS is set to 2 (or 2 or more) by RRC signaling, 2 (or 2 or more) PT-RS ports are used in SDM STxMP, but only 1 PT-RS port (i.e., PT-RS port 0) is used in SFN STxMP. That is, it is proposed that the number of PT-RS ports actually used is determined according to the STxMP. In SFN STxMP, multiple panels transmit the same DM-RS port. Therefore, regardless of which DM-RS port the PT-RS port is related to, the PT-RS port is associated with all of the two panels. Therefore, the PT-RS port cannot be set separately for each panel, and as a result, one PT-RS port is sufficient.

[0168] Also, even if the maximum number of PT-RS is set to 2 for a UE in which the SDM STxMP transmission mode is enabled by RRC signaling, when PUSCH transmission is performed using a single panel or a single SRS resource set, the number of PT-RS is set to 1.

[0169] For example, when the SRS resource set indicator is 00 or 01, and the CSR (codebook subset restriction) of the codebook corresponding to the SRS resource set selected as the SRS resource set indicator is fullyAndPartialAndNonCoherent, the UE ignores that the maximum number of PT-RS is set to 2, assumes that the maximum number of PT-RS is 1 (i.e., assumes that the number of PT-RS ports is 1), and interprets the PT-RS to DM-RS related field of the uplink scheduling DCI. In other words, the UE ignores that the maximum number of PT-RS is set to 2 and interprets the PT-RS to DM-RS related field using Table 6 to Table 8 below. This is because, in the case of a codebook where the CSR is fullyAndPartialAndNonCoherent, the co-interference of all PUSCH antenna ports matches, and phase tracking can be performed with one PT-RS.

[0170] The codebook corresponding to the SRS resource set can mean the codebook used by the TPMI field (e.g., the first TPMI field) connected to the SRS resource set 0 and the TPMI field (e.g., the second TPMI field) connected to the SRS resource set 1.

[0171] As another example, when the SRS resource set indicator is 00 or 01, and the UE reports that it supports full coherency in UE capability, the UE ignores that the maximum number of PT-RS is set to 2, assumes the maximum number of PT-RS is 1 (i.e., assumes the number of PT-RS ports is 1), and interprets the PT-RS to DM-RS related field in the uplink scheduling DCI. In other words, the UE ignores that the maximum number of PT-RS is set to 2 and interprets the PT-RS to DM-RS related field using Tables 6 to 8. This is because the SRS resources of the SRS resource set indicated by the SRS resource set indicator can perform phase tracking with one PT-RS since the coherency between SRS antenna ports is guaranteed.

[0172]

Table 6

[0173]

Table 7

[0174]

Table 8

[0175] In the above-mentioned proposal, the UE ignores that the maximum number of PT-RS is set to 2, assumes the maximum number of PT-RS is 1 or assumes the number of PT-RS ports is 1, and interprets the PT-RS to DM-RS related field in the uplink scheduling DCI. That is, the UE ignores that the maximum number of PT-RS is set to 2 and interprets the PT-RS to DM-RS related field using Table 7.3.1.1.2-25. In the same sense, the UE assumes that all the indicated PUSCH DM-RS ports share PT-RS port 0.

[0176] Alternatively, when SDM STxMP transmission is indicated for a UE in which the SDM STxMP transmission mode is enabled by RRC signaling (for example, when the SRS resource set indicator field set in the UL DCI is 10 or 11 and the PUSCH repetition count is set to 1 or 0, or when the SRS resource set indicator field set in the UL DCI is 10 or 11), the UE ignores the maximum number of PT-RS set by RRC signaling, assumes the maximum number of PT-RS is 2, or assumes the number of PT-RS is 2 and interprets the PT-RS to DM-RS related field of the uplink scheduling DCI. Specifically, the UE performs the following operations for each of the NCB PUSCH and the CB PUSCH.

[0177] When transmitting the NCB PUSCH, assume the number of PT-RS is 2, assume that the SRS resource of SRS resource set 0 indicated by the first SRI field and the DM-RS port corresponding to that SRS resource share PT-RS port 0, and assume that the SRS resource of SRS resource set 0 indicated by the second SRI field and the DM-RS port corresponding to that SRS resource share PT-RS port 1.

[0178] When transmitting the CB PUSCH, assume the number of PT-RS is 2, assume that the DM-RS port generated by applying the PMI indicated by the first TPMI field to the SRS resource of SRS resource set 0 indicated by the first SRI field and the antenna port of that SRS resource shares PT-RS port 0, and assume that the DM-RS port generated by applying the PMI indicated by the second TPMI field to the SRS resource of SRS resource set 1 indicated by the second SRI field and the antenna port of that SRS resource shares PT-RS port 1.

[0179] On one hand, when S-TRP transmission is instructed for a UE in which the SDM STxMP transmission mode is enabled by RRC signaling (for example, when the SRS resource set indicator field set in the UL DCI is set to 00 or 01), the UE defines the association between PT-RS and DM-RS in the conventional manner according to the maximum number of PT-RS set by RRC.

[0180] Figure 7 is a flowchart for transmitting PT-RS for STxMP (simultaneous transmission across multiple panels) according to the present invention. First, in Figure 7, assume that the UE has received in advance from the BS the information that the maximum number of PT-RS is 2, and the UE is performing STxMP.

[0181] Referring to Figure 7, at step A05, the UE receives DCI for STxMP from the BS. In particular, in order to instruct SDM STxMP PUSCH transmission, the 2-bit SRS resource set indicator included in the DCI is set to 10 or 11, and SDM STxMP PUSCH is enabled by another indicator or by a predetermined condition.

[0182] Next, at step A10, the UE checks the association information between the PT-RS port and the DM-RS port included in the DCI. In particular, the first information of the association information between the PT-RS port and the DM-RS port indicates the first DM-RS port related to the first PT-RS port among the DM-RS ports corresponding to at least one of the first SRI and the first precoding information, and the second information of the association information between the PT-RS port and the DM-RS port indicates the second DM-RS port related to the second PT-RS port among the DM-RS ports corresponding to at least one of the second SRI and the second precoding information.

[0183] Preferably, the first information is the first bit of the related information of the PT-RS port to the DM-RS port, and the second information is the second bit of the related information of the PT-RS port to the DM-RS port.

[0184] Also, for step A10, the UE pre-receives, by means of RRC signaling or the like, information regarding a DM-RS port corresponding to at least one of the first SRI and the first precoding information from the BS, and information regarding a DM-RS port corresponding to at least one of the second SRI and the second precoding information.

[0185] After that, in step A15, the UE transmits the first PT-RS on the first PT-RS port and transmits the second PT-RS on the second PT-RS port to the BS.

[0186] Finally, in step A20, the UE performs a first PUSCH transmission based on the first DM-RS related to the first PT-RS and performs a second PUSCH transmission based on the second DM-RS related to the second PT-RS to the BS. In particular, the first DM-RS port is related to the first PUSCH transmitted on the first panel, the second DM-RS port is related to the second PUSCH transmitted on the second panel, and the first PUSCH and the second PUSCH are transmitted to the BS by the same time and the same frequency resource.

[0187] In the present invention, the number of PT-RSs means the number of PT-RS ports.

[0188] In the present invention, for PUSCH, a plurality of panels correspond to a plurality of SRS resource sets configured for CB / NCB use, or correspond to SRS resources indicated by a plurality of SRI fields. For example, each of panel 1 and panel 2 corresponds to SRS resource set 0 and SRS resource set 1. Alternatively, panel 1 and panel 2 correspond to the SRS resources indicated by the first SRI field and the SRS resources indicated by the second SRI field. Alternatively, a plurality of panels correspond to the PMIs indicated by a plurality of TPMI fields. For example, panel 1 corresponds to the PMI indicated by the first TPMI field, and panel 2 corresponds to the PMI indicated by the second TPMI field. Also, for PUCCH, it may correspond to a plurality of spatial relation information set in the PUCCH resource. For example, panel 1 corresponds to spatial relation information 0, and panel 2 corresponds to spatial relation information 1. Alternatively, a panel ID may be introduced into the standard for direct indication of a panel. Alternatively, a plurality of panels correspond to a plurality of uplink TCI states indicated using a unified TCI framework.

[0189] Alternatively, a panel can be defined as an antenna port group having coherency. For example, in a conventional standard, when a 4Tx codebook is configured, PUSCH antenna ports 1000 and 1002 are defined as panel 1, and 1001 and 1003 are defined as panel 2. Similarly, when an 8Tx codebook is introduced in the future, PUSCH antenna ports 1000, 1002, 1004, and 1006 are defined as panel 1, and 1001, 1003, 1005, and 1007 are defined as panel 2. For NCB PUSCH, a PT-RS port index is set for each SRS resource, and it can be assumed that SRS resources with the same PT-RS port index are transmitted on the same panel.

[0190] For the sake of convenience of explanation, the above-mentioned proposal assumed two STxMP panels, two uplink TCI states, and two sets of spatial relation info / RS and PC (Power Control) configured for UL M-TRP transmission. However, this can be extended and applied to N1, N2, and N3 respectively.

[0191] It can be finally applied by the combination / association of the above-mentioned proposal.

[0192] The above-mentioned proposal was described based on PUSCH, but it can also be extended and applied to other channels such as PUCCH / PDSCH / PDCCH.

[0193] Whether to apply the above-mentioned proposal and the factors used in the proposal can be indicated by the base station to the UE through DCI / MAC-CE / RRC signaling, or the UE can report it to the base station.

[0194] FIG. 8 illustrates a communication system 1 to which the present invention is applicable.

[0195] Referring to FIG. 8, the communication system 1 includes wireless devices, base stations, and a network. Here, the wireless device means a device that communicates using a wireless connection technology (e.g., 5G NR, LTE), and is also referred to as a communication / wireless / 5G device. Without being limited thereto, the wireless devices include a robot 100a, vehicles 100b-1, 100b-2, an XR (Extended Reality) device 100c, a hand-held device 100d, home appliances 100e, IoT (Internet of Thing) devices 100f, and an AI server / device 400. For example, the vehicle includes a vehicle equipped with a wireless communication function, an autonomous driving vehicle, a vehicle capable of vehicle-to-vehicle communication, etc. Here, the vehicle includes a UAV (Unmanned Aerial Vehicle) (e.g., a drone). The XR device includes an AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) device, and is embodied in the form of an HMD (Head-Mounted Device), a HUD (Head-Up Display) equipped on a vehicle, a TV, a smartphone, a computer, a wearable device, a home appliance, a digital signboard, a vehicle, a robot, etc. The hand-held device includes a smartphone, a smart pad, a wearable device (e.g., a smartwatch, smart glasses), a computer (e.g., a notebook computer, etc.). The home appliances include a TV, a refrigerator, a washing machine, etc. The IoT devices include sensors, smart meters, etc. For example, the base station and the network are also embodied in the wireless device, and a specific wireless device 200a can also operate as a base station / network node for other wireless devices.

[0196] Wireless devices 100a to 100f are connected to network 300 via base station 200. AI (Artificial Intelligence) technology is applied to wireless devices 100a to 100f, and wireless devices 100a to 100f are connected to AI server 400 via network 300. Network 300 is configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network, etc. Wireless devices 100a to 100f can communicate with each other via base station 200 / network 300, but can also communicate directly without going through the base station / network (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Also, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0197] Wireless communications / connections 150a, 150b, and 150c are performed between wireless devices 100a to 100f / base station 200 and between base station 200 / base station 200. Here, the wireless communications / connections are uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), and communication 150c between base stations (e.g., performed by various wireless connection technologies such as relay, IAB (Integrated Access Backhaul) (e.g., 5G NR)). Through wireless communications / connections 150a, 150b, and 150c, wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to / from each other. For example, wireless communications / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. For this purpose, based on various proposals of the present invention, any one of the setting process of various configuration information for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation process is performed.

[0198] FIG. 9 illustrates a wireless device applicable to the present invention.

[0199] Referring to FIG. 9, the first wireless device 100 and the second wireless device 200 transmit and receive wireless signals by various wireless connection technologies (e.g., LTE, NR). Here, {the first wireless device 100, the second wireless device 200} corresponds to {the wireless device 100x, the base station 200} and / or {the wireless device 100x, the wireless device 100x} in FIG. 8.

[0200] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and further includes one or more transceivers 106 and / or one or more antennas 108. The processor 102 controls the memory 104 and / or the transceiver 106, and is configured to implement the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. For example, after the processor 102 processes the information in the memory 104 to generate a first piece of information / signal, the transceiver 106 transmits a wireless signal including the first piece of information / signal. Also, after the processor 102 receives a wireless signal including a second piece of information / signal by the transceiver 106, the information obtained from the signal processing of the second piece of information / signal is stored in the memory 104. The memory 104 is connected to the processor 102 and stores various information related to the operation of the processor 102. For example, the memory 104 stores software code that performs part or all of the processes controlled by the processor 102, or includes instructions for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. Here, the processor 102 and the memory 104 are part of a communication modem / circuit / chip designed to implement wireless communication technologies (e.g., LTE, NR). The transceiver 106 is connected to the processor 102 and transmits and / or receives wireless signals through one or more antennas 108. The transceiver 106 includes a transmitter and / or a receiver. The transceiver 106 can also be used interchangeably with an RF (radio Frequency) unit. In the present invention, the wireless device can also mean a communication modem / circuit / chip.

[0201] The second wireless device 200 includes one or more processors 202 and one or more memories 204, and further includes one or more transceivers 206 and / or one or more antennas 208. The processor 202 controls the memory 204 and / or the transceiver 206, and is configured to implement the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. For example, after the processor 202 processes the information in the memory 204 to generate third information / signals, the transceiver 206 transmits a wireless signal including the third information / signals. Also, after the processor 202 receives a wireless signal including fourth information / signals by the transceiver 206, the information obtained from the signal processing of the fourth information / signals is stored in the memory 204. The memory 204 is connected to the processor 202 and stores various information related to the operation of the processor 202. For example, the memory 204 stores software code including instructions for performing part or all of the processes controlled by the processor 202, or for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. Here, the processor 202 and the memory 204 are part of a communication modem / circuit / chip designed to implement wireless communication technologies (e.g., LTE, NR). The transceiver 206 is connected to the processor 202 and transmits and / or receives wireless signals through one or more antennas 208. The transceiver 206 includes a transmitter and / or a receiver. The transceiver 206 can also be used interchangeably with an RF unit. In the present invention, the wireless device can also mean a communication modem / circuit / chip.

[0202] Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers are implemented by one or more processors 102 and 202. For example, one or more processors 102 and 202 implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102 and 202 generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (Service Data Units) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. One or more processors 102 and 202 generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. One or more processors 102 and 202 generate a signal (e.g., a baseband signal) including a PDU, an SDU, a message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this specification and provide it to one or more transceivers 106 and 206. One or more processors 102 and 202 receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 and can obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification.

[0203] One or more processors 102, 202 are also referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors 102, 202 are implemented by hardware, firmware, software, or a combination thereof. As an example, one or more ASICs (Application Specific Integrated Circuits), one or more DSPs (Digital Signal Processors), one or more DSPDs (Digital Signal Processing Devices), one or more PLDs (Programmable Logic Devices), or one or more FPGAs (Field Programmable Gate Arrays) are included in one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification are implemented using firmware or software, and the firmware or software is implemented to include modules, procedures, functions, and the like. The firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification is included in one or more processors 102, 202 or stored in one or more memories 104, 204 and driven by one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification are implemented using firmware or software in the form of code, instruction, and / or set of instructions.

[0204] One or more memories 104, 204 are connected to one or more processors 102, 202 and can store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories 104, 204 are composed of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer-readable storage medium, and / or combinations thereof. The one or more memories 104, 204 are located inside and / or outside the one or more processors 102, 202. Also, the one or more memories 104, 204 are connected to the one or more processors 102, 202 by various technologies such as wired or wireless connections.

[0205] One or more transceivers 106, 206 can transmit user data, control information, radio signals / channels, etc. mentioned in this specification, such as in methods and / or flowcharts, to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, radio signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification from one or more other devices. For example, one or more transceivers 106, 206 are connected to one or more processors 102, 202 and can transmit and receive radio signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices. Also, one or more transceivers 106, 206 are connected to one or more antennas 108, 208, and one or more transceivers 106, 206 are configured to transmit and receive user data, control information, radio signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification by one or more antennas 108, 208. In this specification, one or more antennas are multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 convert received radio signals / channels, etc. from RF band signals to baseband signals (Convert) in order to process the received user data, control information, radio signals / channels, etc. using one or more processors 102, 202. One or more transceivers 106, 206 convert user data, control information, radio signals / channels, etc. processed using one or more processors 102, 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106, 206 include (analog) oscillators and / or filters.

[0206] FIG. 10 shows another example of a wireless device to which the present invention is applied. The wireless device is embodied in various forms depending on the usage example / service (see FIG. 8).

[0207] Referring to FIG. 10, wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 9 and are composed of various elements, components, units / parts, and / or modules. For example, wireless devices 100 and 200 include a communication unit 110, a control unit 120, a memory unit 130, and additional elements 140. The communication unit includes a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 includes one or more processors 102 and 202 and / or one or more memories 104 and 204 in FIG. 9. For example, the transceiver 114 includes one or more transceivers 106 and 206 and / or one or more antennas 108 and 208 of FIG. 9. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional elements 140 and controls various operations of the wireless device. For example, the control unit 120 controls the electrical / mechanical operations of the wireless device based on programs / codes / instructions / information stored in the memory unit 130. The control unit 120 also transmits the information stored in the memory unit 130 to the outside (e.g., other communication devices) through a wireless / wired interface by the communication unit 110, or stores the information received from the outside (e.g., other communication devices) through a wireless / wired interface by the communication unit 110 in the memory unit 130.

[0208] The additional element 140 is configured in various ways depending on the type of wireless device. For example, the additional element 140 includes any one of a power unit / battery, an input / output unit (I / O unit), a drive unit, and a computer unit. Without being limited thereto, the wireless device is embodied in forms such as a robot (FIG. 8, 100a), a vehicle (FIG. 8, 100b-1, 100b-2), an XR device (FIG. 8, 100c), a portable device (FIG. 8, 100d), a home appliance (FIG. 8, 100e), an IoT device (FIG. 8, 100f), a digital broadcast terminal, a hologram 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 (FIG. 8, 400), a base station (FIG. 8, 200), and a network node. The wireless device is movable depending on the usage example / service or is used at a fixed location.

[0209] In FIG. 10, various elements, components, units / parts, and / or modules within the wireless devices 100 and 200 are all connected to each other by a wired interface or at least some of them are wirelessly connected by the communication unit 110. For example, within the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are wired-connected, and the control unit 120 and the first unit (for example, 130, 140 are wirelessly connected by the communication unit 110. Also, each element, component, unit / part, and / or module within the wireless devices 100 and 200 further includes one or more elements. For example, the control unit 120 is composed of a set of one or more processors. For example, the control unit 120 is composed of a set including a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processing processor, a memory control processor, etc. As another example, the memory unit 130 is composed of a RAM (Random Access Memory), a DRAM (Dynamic RAM), a ROM (Read Only Memory), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0210] FIG. 11 is a diagram illustrating a vehicle or an autonomous vehicle to which the present invention is applied. The vehicle or the autonomous vehicle is embodied as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, or the like.

[0211] One or more memories 104 and 204 are connected to one or more processors 102 and 202 and can store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories 104 and 204 are composed of a ROM, a RAM, an EPROM, a flash memory, a hard drive, a register, a cache memory, a computer-readable storage medium, and / or a combination thereof. The one or more memories 104 and 204 are located inside and / or outside the one or more processors 102 and 202. Also, the one or more memories 104 and 204 are connected to the one or more processors 102 and 202 by various techniques such as wired or wireless connections.

[0212] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc. mentioned in this specification, such as in methods and / or flowcharts, to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification from one or more other devices. For example, one or more transceivers 106, 206 are connected to one or more processors 102, 202 and can transmit and receive wireless signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information, or wireless signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. Also, one or more transceivers 106, 206 are connected to one or more antennas 108, 208, and one or more transceivers 106, 206 are configured to transmit and receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification by one or more antennas 108, 208. In this specification, one or more antennas are multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 convert received wireless signals / channels, etc. from RF band signals to baseband signals (Convert) in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors 102, 202. One or more transceivers 106, 206 convert user data, control information, wireless signals / channels, etc. processed using one or more processors 102, 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106, 206 include (analog) oscillators and / or filters.

[0213] FIG. 10 shows another example of a wireless device to which the present invention is applied. The wireless device is embodied in various forms depending on the usage example / service (see FIG. 8).

[0214] Referring to FIG. 10, wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 9 and are composed of various elements, components, units / parts, and / or modules. For example, wireless devices 100 and 200 include a communication unit 110, a control unit 120, a memory unit 130, and additional elements 140. The communication unit includes a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 includes one or more processors 102 and 202 and / or one or more memories 104 and 204 in FIG. 9. For example, the transceiver 114 includes one or more transceivers 106 and 206 and / or one or more antennas 108 and 208 of FIG. 9. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional elements 140 and controls various operations of the wireless device. For example, the control unit 120 controls the electrical / mechanical operations of the wireless device based on programs / codes / instructions / information stored in the memory unit 130. The control unit 120 also transmits the information stored in the memory unit 130 to the outside (e.g., other communication devices) through a wireless / wired interface by the communication unit 110, or stores the information received from the outside (e.g., other communication devices) through a wireless / wired interface by the communication unit 110 in the memory unit 130.

[0215] The additional element 140 is configured in various ways depending on the type of wireless device. For example, the additional element 140 includes any one of a power unit / battery, an input / output unit (I / O unit), a drive unit, and a computer unit. Without being limited thereto, the wireless device is embodied in the form of a robot (Figs. 8, 100a), a vehicle (Figs. 8, 100b-1, 100b-2), an XR device (Figs. 8, 100c), a portable device (Figs. 8, 100d), a home appliance (Figs. 8, 100e), an IoT device (Figs. 8, 100f), a digital broadcast terminal, a hologram 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 (Figs. 8, 400), a base station (Figs. 8, 200), and a network node. The wireless device is movable depending on the usage example / service or is used at a fixed location.

[0216] In Fig. 10, various elements, components, units / parts, and / or modules within the wireless devices 100 and 200 are all connected to each other by a wired interface or at least some of them are wirelessly connected by the communication unit 110. For example, within the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are wired-connected, and the control unit 120 and the first unit (e.g., 130, 140) are wirelessly connected by the communication unit 110. Also, each element, component, unit / part, and / or module within the wireless devices 100 and 200 further includes one or more elements. For example, the control unit 120 is composed of a set of one or more processors. For example, the control unit 120 is composed of a set including a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processing processor, a memory control processor, etc. As another example, the memory unit 130 is composed of a RAM (Random Access Memory), a DRAM (Dynamic RAM), a ROM (Read Only Memory), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0217] FIG. 11 is a diagram illustrating a vehicle or an autonomous vehicle to which the present invention is applied. The vehicle or the autonomous vehicle is embodied as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, or the like.

[0218] Referring to FIG. 11, the vehicle or the autonomous vehicle 100 includes 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 is configured as a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to blocks 110 / 130 / 140 in FIG. 12.

[0219] The communication unit 110 transmits and receives signals (such as data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 controls elements of the vehicle or the autonomous driving vehicle 100 to perform various operations. The control unit 120 includes an ECU (Electronic Control Unit). The driving unit 140a enables the vehicle or the autonomous driving vehicle 100 to travel on the ground. The driving unit 140a includes an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or the autonomous driving vehicle 100 and includes a wired / wireless charging circuit, a battery, etc. The sensor unit 140c can obtain vehicle state, surrounding environment information, user information, etc. The sensor unit 140c includes an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensing 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 humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit 140d implements technologies such as maintaining the lane during driving, automatically adjusting the speed like an adaptive cruise control, automatically driving along a predetermined route, and automatically setting and driving along a route when a destination is set.

[0220] As an example, the communication unit 110 receives map data, traffic information data, etc. from an external server. The autonomous driving unit 140d generates an autonomous driving route and a drive plan based on the obtained data. The control unit 120 controls the driving unit 140a so that the vehicle or the autonomous driving vehicle 100 moves along the autonomous driving route according to the drive plan (for example, speed / direction adjustment). The communication unit 110 periodically obtains the latest traffic information data from the external server during autonomous driving, and also obtains the surrounding traffic information data from the surrounding vehicles. In addition, the sensor unit 140c obtains vehicle state and surrounding environment information during autonomous driving. The autonomous driving unit 140d updates the autonomous driving route and the drive plan based on the newly obtained data / information. The communication unit 110 transmits information regarding the vehicle position, the autonomous driving route, the drive plan, etc. to the external server. The external server can predict traffic information data in advance using AI technology or the like based on the information collected from the vehicle or the autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or the autonomous driving vehicle.

[0221] In the above-described embodiments, the components and features of the present invention are combined in a predetermined form. Each component or feature should be considered as optional unless otherwise explicitly mentioned. Each component or feature can be implemented in a form that is not combined with other components or features. Also, it is possible to combine some components and / or features to form an embodiment of the present invention. The order of each operation described in the embodiments of the present invention can be changed. Some configurations and features of any one embodiment can be included in other embodiments, or can be replaced with corresponding configurations or features of other embodiments. It is obvious that embodiments can be constituted by combining claims that have no explicit citation relationship in the claims, or can be included as new claims by amendment after filing.

[0222] It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the features of the present invention. Therefore, the above detailed description should not be construed restrictively in all aspects and should be considered as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Industrial Applicability

[0223] The present invention can be used in terminals, base stations or other equipment of wireless mobile communication systems.

Claims

1. A method performed by a UE (User Equipment) in a wireless communication system, comprising: receiving, from a BS (Base Station), DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels); transmitting, based on the association information of the PT (Phase Tracking)-RS (Reference Signal) port pair to the DM (Demodulation)-RS port included in the DCI, a first PT-RS on a first PT-RS port and a second PT-RS on a second PT-RS port to the BS, wherein the first information of the association information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port associated with the first PT-RS port among the DM-RS ports corresponding to at least one of a first SRI (Sounding reference signal Resource Indicator) and first precoding information; and the second information of the association information of the PT-RS port pair to the DM-RS port indicates a second DM-RS port associated with the second PT-RS port among the DM-RS ports corresponding to at least one of a second SRI and second precoding information. A method.

2. The method according to claim 1, further comprising receiving, from the BS, information that the maximum number of the PT-RS is 2. The method according to claim 1.

3. The first information is the first bit of the association information of the PT-RS port pair to the DM-RS port; and the second information is the second bit of the association information of the PT-RS port pair to the DM-RS port. The method according to claim 1.

4. The method according to claim 1, further comprising receiving, from the BS, information regarding the DM-RS port corresponding to at least one of the first SRI and first precoding information and information regarding the DM-RS port corresponding to at least one of the second SRI and second precoding information. The method according to claim 1.

5. The first DM-RS port is associated with a first PUSCH transmitted on a first panel; and the second DM-RS port is associated with a second PUSCH transmitted on a second panel. The first PUSCH and the second PUSCH are characterized in that they are transmitted by the BS using the same time and the same frequency resources. The method according to claim 1.

6. A UE (User Equipment) in a wireless communication system, at least one transceiver, at least one processor, at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations, the operations including: receiving DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) from a BS (Base Station); transmitting a first PT-RS on a first PT-RS port and a second PT-RS on a second PT-RS port to the BS based on the associated information of the PT (Phase Tracking)-RS port pair to the DM (Demodulation)-RS port, wherein the first information of the associated information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port associated with the first PT-RS port among the DM-RS ports corresponding to at least one of a first SRI (Sounding reference signal Resource Indicator) and first precoding information; the second information of the associated information of the PT-RS port pair to the DM-RS port is characterized by indicating a second DM-RS port associated with the second PT-RS port among the DM-RS ports corresponding to at least one of a second SRI and second precoding information. UE.

7. The operations further include: receiving from the BS information that the maximum number of the PT-RS is 2. The UE according to claim 6.

8. The first information is the first bit of the associated information of the PT-RS port pair to the DM-RS port; the second information is the second bit of the associated information of the PT-RS port pair to the DM-RS port. The UE according to claim 6.

9. The operations Further including receiving, from the BS, information regarding a DM-RS port corresponding to at least one of the first SRI and the first precoding information, and information regarding a DM-RS port corresponding to at least one of the second SRI and the second precoding information, characterized in that The UE according to claim 6.

10. The first DM-RS port is associated with a first PUSCH transmitted on a first panel, The second DM-RS port is associated with a second PUSCH transmitted on a second panel, The first PUSCH and the second PUSCH are characterized in that they are transmitted by the BS using the same time and the same frequency resources. The UE according to claim 6.

11. A processing device in a wireless communication system, At least one processor, At least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations for a UE (User Equipment), the operations including Receiving, from a BS (Base Station), DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels); Based on the associated information of the PT (Phase Tracking)-RS (Reference Signal) port to the DM (Demodulation)-RS port included in the DCI, transmitting a first PT-RS on a first PT-RS port and a second PT-RS on a second PT-RS port to the BS, including The first information of the associated information of the PT-RS port to the DM-RS port indicates a first DM-RS port associated with the first PT-RS port among the DM-RS ports corresponding to at least one of the first SRI (Sounding reference signal Resource Indicator) and the first precoding information. The second information on the related information of the PT-RS port to the DM-RS port indicates a second DM-RS port related to the second PT-RS port among the DM-RS ports corresponding to at least one of the second SRI and the second precoding information. Processing device. Claim 12 A computer-readable storage medium, which, when executed, stores at least one program code including instructions for causing at least one processor to perform operations for a UE (User Equipment), and the operations include: receiving DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) from a BS (Base Station); transmitting a first PT-RS on a first PT-RS port and a second PT-RS on a second PT-RS port to the BS based on the related information of the PT (Phase Tracking)-RS (Reference Signal) port to the DM (Demodulation)-RS port included in the DCI; The first information on the related information of the PT-RS port to the DM-RS port indicates a first DM-RS port related to the first PT-RS port among the DM-RS ports corresponding to at least one of the first SRI (Sounding reference signal Resource Indicator) and the first precoding information. The second information on the related information of the PT-RS port to the DM-RS port indicates a second DM-RS port related to the second PT-RS port among the DM-RS ports corresponding to at least one of the second SRI and the second precoding information. Storage medium. Claim 13 A method performed by a BS (Base Station) in a wireless communication system, the method including transmitting DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels) to a UE (User Equipment). Receiving, from the UE, a first PT-RS on a first PT port and a second PT-RS on a second PT port based on the related information of the (Phase Tracking)-RS (Reference Signal) (port) pair in the DCI included in the DCI; The first information of the related information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port related to the first PT-RS port among the DM-RS ports corresponding to at least one of the first SRI (Sounding reference signal Resource Indicator) and the first precoding information; The second information of the related information of the PT-RS port pair to the DM-RS port is characterized by indicating a second DM-RS port related to the second PT-RS port among the DM-RS ports corresponding to at least one of the second SRI and the second precoding information; Method.

14. The method further includes transmitting, to the UE, information that the maximum number of the PT-RS is 2. The method according to claim 13.

15. The first information is the first bit of the related information of the PT-RS port pair to the DM-RS port; The second information is characterized by being the second bit of the related information of the PT-RS port pair to the DM-RS port. The method according to claim 13.

16. The method further includes transmitting, to the UE, information related to a DM-RS port corresponding to at least one of the first SRI and the first precoding information, and information related to a DM-RS port corresponding to at least one of the second SRI and the second precoding information. The method according to claim 13.

17. The first DM-RS port is related to a first PUSCH transmitted on a first panel; The second DM-RS port is related to a second PUSCH transmitted on a second panel; The first PUSCH and the second PUSCH are received from the UE by the same time and the same frequency resource. The method according to claim 13.

18. A BS (Base Station) in a wireless communication system, At least one transceiver; At least one processor; including at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations, the operations being transmitting, by a UE (User Equipment), DCI (Downlink Control Information) for STxMP (simultaneous transmission across multiple panels); receiving, by the UE, a first PT-RS on a first PT port and a second PT-RS on a second PT-RS port based on association information of a (Phase Tracking)-RS (Reference Signal) (port) pair to a DM (Demodulation)-RS port included in the DCI; a first piece of information of the association information of the PT-RS port pair to the DM-RS port indicates a first DM-RS port associated with the first PT-RS port among DM-RS ports corresponding to at least one of a first SRI (Sounding reference signal Resource Indicator) and first precoding information; a second piece of information of the association information of the PT-RS port pair to the DM-RS port indicates a second DM-RS port associated with the second PT-RS port among DM-RS ports corresponding to at least one of a second SRI and second precoding information; BS.

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