Terminal, base station, system, and wireless communication method

Abstract

A terminal according to one embodiment of the present disclosure includes a control unit that determines an association between a phase tracking reference signal (PTRS) port related to a plurality of physical downlink shared channels (PDSCHs) and a demodulation reference signal (DMRS) port related to the plurality of PDSCHs when the number of PTRS ports set, the number of indicated transmission configuration indication states (TCI states) applicable to the plurality of PDSCHs, or the number of default TCI states applicable to the plurality of PDSCHs are different, and a reception unit that receives the plurality of PDSCHs based on one downlink control information. According to one embodiment of the present disclosure, communication can be appropriately performed even when multiple panels / TRPs are used.

Description

Technical Field

[0001] This disclosure relates to terminals in next-generation mobile communication systems and wireless communication methods. Background Technology

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was standardized with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and improving the height of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] The development of successor systems to LTE (such as 5th generation mobile communication system (5G), 5G+, New Radio (NR), 3GPP Rel.15 and later, etc.) is also underway.

[0004] Existing technical documents

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] Research is underway on how, in future wireless communication systems (such as NR), user terminals (User Equipment (UE)) will control transmit and receive processes based on information related to quasi-co-location (QCL).

[0009] In addition, research is underway in NR on the use of one or more Transmission / Reception Points (TRPs) (multiple TRPs) to transmit and receive data with the UE using one or more panels (multiple panels).

[0010] However, in Rel.16NR, research is underway to support two Phase Tracking Reference Signal (PTRS) ports for multi-panel / TRP transmission based on a single PDCCH. Regarding cases where the UE is configured with two PTRS ports and indicated with two TCI states, the association between the QCL of the PTRS ports and the DeModulation Reference Signal (DMRS) ports has been investigated.

[0011] However, for other cases, such as a UE configured with one PTRS port and indicated with two TCL states, or a UE configured with two PTRS ports and indicated with one TCL state, the association between PTRS ports and DMRS ports has not yet been studied. Without explicitly defining them, it is impossible to properly achieve spatial diversity gain and high-rank transmission when using multiple panels / TRPs, raising concerns that the increase in communication throughput may be suppressed.

[0012] Therefore, one of the objectives of this disclosure is to provide a user terminal and a wireless communication method that can properly implement communication even when using a multi-panel / TRP.

[0013] Methods for solving problems

[0014] The user terminal involved in one aspect of this disclosure is characterized by having: a control unit that determines the association between the PTRS port associated with the multiple PDSCH and the DeModulation Reference Signal (DMRS) port associated with the multiple PDSCH when the number of set Phase Tracking Reference (PRTS) ports differs from the number of indicated Transmission Configuration Indication states (TCI states) applicable to multiple downlink shared channels (Physical Downlink Shared Channels (PDSCHs)) or the number of default TCI states applicable to the multiple PDSCHs; and a receiving unit that receives the multiple PDSCHs based on a downlink control signal.

[0015] Invention Effects

[0016] According to one method disclosed herein, communication can be properly implemented even when using a multi-panel / TRP. Attached Figure Description

[0017] Figure 1 This is a diagram illustrating an example of the QCL concept for the DMRS port of PDSCH.

[0018] Figures 2A-2D This is a diagram illustrating an example of a multi-TRP scenario.

[0019] Figure 3 This is a diagram illustrating an example of the association between the PTRS port and the DMRS port according to the first embodiment.

[0020] Figure 4 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0021] Figure 5 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0022] Figure 6 This is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.

[0023] Figure 7 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. Detailed Implementation

[0024] (TCI, Spatial Relations, QCL)

[0025] In NR, the following is being studied: The UE controls the reception processing (e.g., at least one of receiving, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmitting, mapping, precoding, modulation, and encoding) of at least one of the signals and channels (which can also be labeled as signal / channel. In this disclosure, "A / B" can also be replaced with "at least one of A and B").

[0026] TCI states can also represent the states of signals / channels applied to the downlink. States equivalent to the TCI states of signals / channels applied to the uplink can also be expressed as spatial relations.

[0027] TCI status is information related to the quasi-co-location (QCL) of signals / channels, and can also be called spatial reception parameters, spatial relation information (SRI), etc. TCI status can also be set for the UE on a per-channel or per-signal basis.

[0028] QCL is an indicator that represents the statistical properties of a signal / channel. For example, it can also mean that when a signal / channel is in a QCL relationship with other signals / channels, it can be assumed that at least one of the following is the same among these different signals / channels: Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) (with regard to at least one of these being QCL).

[0029] Alternatively, the spatial reception parameters may correspond to the UE's receive beam (e.g., receive analog beam), or the beam may be determined based on the spatial QCL. The QCL (or at least one element of the QCL) in this disclosure may also be replaced with sQCL (spatial QCL).

[0030] A QCL can also be defined with multiple types (QCL types). For example, four QCL types (ADs) can be defined, in which the parameters (or parameter sets) that can be assumed to be the same are different. The following represents the parameter (also called the QCL parameter):

[0031] • QCL Type A: Doppler shift, Doppler spread, average delay, and delay spread.

[0032] • QCL Type B: Doppler shift and Doppler extension,

[0033] • QCL type C: Doppler shift and average delay,

[0034] • QCL type D: Space reception parameters.

[0035] Types A through C can also be equivalent to QCL information associated with synchronization processing of at least one of time and frequency, and type D can also be equivalent to QCL information associated with beam control.

[0036] The UE is envisioned as a specific Control Resource Set (CORESET), channel, or reference signal, and is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels, or reference signals. This situation can also be called QCL assumption.

[0037] The UE may also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0038] The TCI state can also be, for example, information about the QCL of the target channel (or the reference signal (RS) used by that channel) and other signals (e.g., other downlink reference signals (Downlink Reference Signal (DL-RS))). The TCI state can also be set (indicated) by higher-layer signaling, physical-layer signaling, or a combination thereof.

[0039] In this disclosure, higher-level signaling may also be one or a combination of, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc.

[0040] MAC signaling can also use, for example, MAC Control Element (MAC CE) and MAC Protocol Data Unit (PDU). Broadcast information can also be, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), and Other System Information (OSI).

[0041] Physical layer signaling can also be, for example, downlink control information (Downlink Control Information (DCI)).

[0042] The channel that is set (designated) to TCI state can be, for example, at least one of the following: downlink shared channel (Physical Downlink Shared Channel (PDSCH))), downlink control channel (Physical Downlink Control Channel (PDCCH))), uplink shared channel (Physical Uplink Shared Channel (PUSCH))), and uplink control channel (Physical Uplink Control Channel (PUCCH))).

[0043] Furthermore, the RS (DL-RS) that forms a QCL relationship with the channel can be at least one of, for example, a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), or a Measurement Reference Signal (Sounding Reference Signal (SRS)). Alternatively, the DL-RS can also be a CSI-RS used for tracking (also known as a Tracking Reference Signal (TRS)) or a reference signal used for QCL detection (also known as a QRS).

[0044] An SSB is a block of signals that contains at least one Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and broadcast channel (Physical Broadcast Channel (PBCH)). An SSB can also be referred to as an SS / PBCH block.

[0045] The TCI state information element (RRC's "TCI-state IE") set via higher-layer signaling may also contain one or more QCL information ("QCL-Info"). The QCL information may also include at least one of the following: information related to the DL-RS that form a QCL relationship (DL-RS relationship information) and information indicating the QCL type (QCL type information). The DL-RS relationship information may also include information such as the index of the DL-RS (e.g., SSB index, Non-Zero-Power (NZP) CSI-RS resource ID (Identifier)), the index of the cell where the RS is located, and the index of the Bandwidth Part (BWP) where the RS is located.

[0046] <TCI status for PDCCH>

[0047] Information related to the PDCCH (or the DMRS antenna port associated with the PDCCH) and the QCL of a specific DL-RS can also be referred to as the TCI status for the PDCCH, etc.

[0048] The UE can also determine the TCI status of the UE-specific PDCCH (CORESET) based on higher-layer signaling.

[0049] In this disclosure, higher-level signaling may also be one or a combination of, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc.

[0050] MAC signaling can also use, for example, MAC control elements (MAC CE) and MAC PDUs (Protocol Data Units). Broadcast information can also be, for example, Master Information Blocks (MIBs), System Information Blocks (SIBs), and Remaining Minimum System Information (RMSIs).

[0051] For example, the UE can also set one or more (K) TCI states for each CORESET via RRC signaling (Control Resource Set information element). Furthermore, for each CORESET, the UE can also use a MAC CE to activate one or more of its respective TCI states. This MAC CE can also be called a UE-specific PDCCH TCI State Indication MAC CE. The UE can also monitor a CORESET based on the activated TCI states corresponding to that CORESET.

[0052] <TCI status for PDSCH>

[0053] Information related to the PDSCH (or the DMRS antenna port associated with the PDSCH) and the QCL of a specific DL-RS can also be referred to as the TCI status for the PDSCH, etc.

[0054] The UE can also be notified (set) M (M≥1) TCI states (M QCL information used by PDSCH) via higher-layer signaling. In addition, the number M of TCI states set for the UE can also be limited by at least one of the UE capability and QCL type.

[0055] The downlink control information (DCI) used for PDSCH scheduling can also include specific fields (also referred to as, for example, TCI field, TCI status field, etc.) indicating the TCI status used by that PDSCH. This DCI can also be used for PDSCH scheduling within a cell, and can also be referred to as DL DCI, DL allocation, DCI format 1_0, DCI format 1_1, etc.

[0056] Whether the TCI field is included in the DCI can also be controlled by information notified to the UE from the base station. This information can also be information indicating whether the TCI field exists (present or absent) within the DCI (e.g., TCI presence information, TCI presence information within the DCI, higher-layer parameter tci-PresentInDCI). This information can also be set to the UE via, for example, higher-layer signaling.

[0057] In cases where the DCI includes a TCI field of x bits (e.g., x = 3), the base station can also use higher-layer signaling to pre-set a maximum of 2 for the UE. x (For example, when x = 3, 8) types of TCI states. The value of the TCI field within the DCI (TCI field value) can also represent one of the TCI states pre-defined by higher-layer signaling.

[0058] When more than eight TCI states are assigned to the UE, a MAC CE can also be used to activate (or specify) fewer than eight TCI states. This MAC CE can also be called a UE-specific PDSCH MAC CE. The value of the TCI field within the DCI can also represent one of the TCI states activated by the MAC CE.

[0059] The MAC CE is used to specify the TCI state of the code point mapped to the TCI field in the TCI state ID set by the RRC signaling, and to activate that TCI state. The activated TCI state can also be mapped to code point values ​​from 0 to 2 in the aforementioned TCI field, either in ascending or descending order of the TCI state ID. x -1 (for example, 7 when x = 3).

[0060] If the time slot for the UE to transmit HARQ-ACK (Hybrid Automatic Repeat reQuest ACKknowledgement) for the PDSCH that provides the aforementioned MAC CE is set to n, then the activation / deactivation based on this MAC CE (the mapping between the TCI field and the TCI state within the DCI) can also be applied starting from time slot n+3*(number of time slots in the subframe)+1. That is, in time slot n+3*(number of time slots in the subframe)+1, the update of the code point of the TCI field based on the aforementioned MAC CE can also be effective.

[0061] When the TCI presence information is set to "enabled", the TCI field in the DCI of the component carrier (CC) scheduled (for PDSCH) indicates the activated TCI state in the scheduled CC or DL ​​BWP. Furthermore, when the PDSCH is scheduled according to DCI format 1_1, in order to determine the QCL of the PDSCH antenna interface, the UE can use the TCI based on the value of the TCI field in the PDCCH that has DCI and has been detected.

[0062] If the time offset between the UE's reception of the DL DCI and the reception of the PDSCH corresponding to that DCI is above a certain threshold, the UE may also assume that the RS in the TCI state related to the QCL type parameter(s) given by the TCI state indicated by that DCI, and the DMRS port of the serving cell's PDSCH are QCL ("the DM-RS ports of PDSCH of a serving cell are quasi co-located with the RS(s) in the TCI state with respect to the QCL type parameter(s) given by the indicated TCI state").

[0063] The time offset between the reception of a DL DCI and the reception of the corresponding PDSCH can also be called the scheduling offset.

[0064] In addition, the above threshold can also be referred to as "Threshold", "Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", "Threshold-Sched-Offset", "timeDurationForQCL", scheduling offset threshold, scheduling offset threshold, QCL duration, etc.

[0065] The scheduling offset threshold can be based on UE capabilities, or on delays involved in, for example, PDCCH decoding and beam switching. This scheduling offset threshold information can also be set from the base station using higher-layer signaling, or it can be sent from the UE to the base station.

[0066] When the scheduling offset is higher than the scheduling offset threshold, the UE may also assume that the RS associated with the DMRS port of the PDSCH and the QCL type parameter given by the TCI state indicated by the DCI is QCL.

[0067] Furthermore, if the scheduling offset is less than the scheduling offset threshold, the UE can also be assumed that: the RS in the TCI state with respect to the QCL parameter(s) used for PDCCH quasi co-location indication of the lowest CORESET-ID in the latest slot of the UE is QCL.

[0068] For example, the UE can also be envisioned as follows: the DMRS port of the aforementioned PDSCH and the DL-RS based on the TCI state activated for the CORESET corresponding to the aforementioned minimum CORESET-ID are QCLs. The latest timeslot can also be, for example, the timeslot for receiving the DCI that schedules the aforementioned PDSCH.

[0069] Alternatively, the CORESET-ID can also be an ID set by the RRC information element "ControlResourceSet" (used to identify the CORESET).

[0070] Figure 1This diagram illustrates an example of the QCL assumption for the DMRS port of the PDSCH. In this example, the scheduling offset is smaller than the scheduling offset threshold. Therefore, the UE can also assume that the DMRS port of the PDSCH is QCL with the RS in the TCI state of the PDCCH corresponding to the smallest CORESET-ID in the latest time slot (e.g., PDCCH with DMRS).

[0071] When a UE is configured with a single-slot PDSCH, the indicated TCI state can also be based on the active TCI state within the slot of the scheduled PDSCH. When a UE is configured with a multi-slot PDSCH, the indicated TCI state can be based on the active TCI state within the initial slot of the scheduled PDSCH, and the UE can also expect the indicated TCI state to be consistent across the slots of the scheduled PDSCH.

[0072] When the UE is configured with a CORESET associated with a search space set for cross-carrier scheduling, the TCI presence information is set to "valid" for the UE for that CORESET. If at least one TCI state configured for the serving cell scheduled according to the search space set includes QCL type D, the UE may also assume that the time offset between the detected PDCCH and the PDSCH corresponding to the PDCCH is above a threshold.

[0073] (Multiple TRP panels)

[0074] In NR, research is underway on: one or more Transmission / Reception Points (TRPs) (multiple TRPs) using one or more panels (multiple panels) to perform DL transmissions to the UE. Additionally, research is underway on: the UE performing UL transmissions to one or more TRPs.

[0075] Furthermore, multiple TRPs can correspond to the same cell identifier (cell Identifier(ID)) or different cell IDs. This cell ID can be either a physical cell ID or a virtual cell ID.

[0076] Figures 2A-2D This is a diagram illustrating an example of a multi-TRP scenario. In these examples, it is assumed that each TRP can transmit four different beams, but it is not limited to this.

[0077] Figure 2A This illustrates a case where only one TRP (TRP1 in this example) transmits data to the UE in a multi-TRP configuration (also known as single-mode, single TRP, etc.). In this case, TRP1 transmits both control signals (PDCCH) and data signals (PDSCH) to the UE.

[0078] Figure 2B This illustrates an example of a multi-TRP system where only one TRP (TRP1 in this example) sends control signals to the UE, and that same TRP also sends data signals (also known as single-master mode). The UE receives each PDSCH sent by the multi-TRP based on a single Downlink Control Information (DCI) message.

[0079] Figure 2C This illustrates an example of multiple TRPs each sending a portion of the control signal to the UE, and the data signals being transmitted by these multiple TRPs (also known as master-slave mode). Alternatively, TRP1 can send the first portion of the control signal (DCI), and TRP2 can send the second portion of the control signal (DCI). The second portion of the control signal can also depend on the first portion. The UE receives each PDSCH transmitted by the multiple TRPs based on these portions of the DCI.

[0080] Figure 2D This illustrates an example of a multi-TRP (Transmission Control Point) system where different control signals are sent to the UE, and data signals are also transmitted by these multiple TRPs (also known as multi-master mode). Alternatively, a first control signal (DCI) can be sent via TRP1, and a second control signal (DCI) can be sent via TRP2. The UE receives each PDSCH sent from these multiple TRPs based on these DCIs.

[0081] In such Figure 2B In this case, where a single DCI schedules multiple PDSCHs from multiple TRPs (also known as multiple PDSCHs), the DCI can also be called a single DCI (single PDCCH). Furthermore, in situations such as... Figure 2D In this case, multiple DCIs are used to schedule multiple PDSCHs from multiple TRPs. These multiple DCIs can also be called multiple DCIs (multiple PDCCHs).

[0082] Each TRP in a multi-TRP system can also send different codewords (CWs) and different layers. Non-coherent joint transmission (NCJT) is also under investigation as a method of multi-TRP transmission.

[0083] In NCJT, for example, TRP1 performs modulation mapping on the first codeword and layer mapping, thereby transmitting the first PDSCH using the first precoding of a first number of layers (e.g., 2 layers). Furthermore, TRP2 performs modulation mapping on the second codeword and layer mapping, transmitting the second PDSCH using the second precoding of a second number of layers (e.g., 2 layers).

[0084] Furthermore, multiple PDSCHs (multiple PDSCHs) of NCJT can also be defined as being partially or completely repeated in at least one of the time and frequency domains. That is, at least one of the time and frequency domains of the first PDSCH from the first TRP and the second PDSCH from the second TRP can be repeated.

[0085] It can also be assumed that these first and second PDSCHs do not have a quasi-co-location (QCL) relationship. The reception of multiple PDSCHs can also be replaced by the simultaneous reception of PDSCHs of non-specific QCL types (e.g., QCL type D).

[0086] When the TCI state corresponding to the value of the TCI field (also called the TCI code point) represented by the single DCI described above is a TCI state (one panel copy), the UE can also assume that it will transmit via a single PDCCH using a single TRP. In other words, if the TCI state corresponding to the smallest TCI code point is a TCI state, even if the UE is scheduled to receive multiple PDSCHs via a single PDCCH, it will only receive one of the multiple PDSCHs based on that single TCI state.

[0087] Furthermore, when there are two TCI states (two panel parts) corresponding to a certain TCI code point, the UE can also assume that one of the TCI states (e.g., the first TCI state) applies to the first TRP (one of the multiple PDSCHs), and the other (e.g., the second TCI state) applies to the second TRP (the other of the multiple PDSCHs).

[0088] Based on this multi-TRP scenario, more flexible transmission control is possible when using high-quality channels.

[0089] (PTRS and DMRS)

[0090] However, in NR, it can be assumed that the DMRS port associated with the PTRS port is a QCL for QCL types A and D. In other words, when a PTRS port is associated with a DMRS port, it can be assumed that the PTRS port and the DMRS port have a QCL relationship of A and D with each other.

[0091] When a UE is scheduled with a codeword, the PTRS antenna port is associated with the DMRS antenna port with the smallest index among the DMRS antenna ports allocated for the scheduled PDSCH.

[0092] When the UE is scheduled with two codewords, the PTRS antenna port is associated with the DMRS antenna port with the smallest index among the DMRS antenna ports allocated for the codeword with a higher MCS. Conversely, if the MCS indices of the two codewords are the same, the PTRS antenna port is associated with the DMRS antenna port with the smallest index among the DMRS antenna ports allocated for the first codeword (codeword 0).

[0093] In Rel.16NR, the following is being investigated: In order to Figure 2B The multi-panel / TRP transmission based on a single PDCCH is shown in the figure, which supports two PTRS ports (first PTRS port and second PTRS port).

[0094] The UE can envision that one of the two PTRS ports (e.g., the first PTRS port) corresponds to the first TRP (one of the multiple PDSCHs), and the other (e.g., the second PTRS port) corresponds to the second TRP (the other of the multiple PDSCHs).

[0095] Additionally, a UE can also be configured with two PTRS ports via RRC signaling. Furthermore, whether a UE supports two PTRS ports depends on the UE's capabilities.

[0096] Here, when the UE is indicated with two TCI states (first TCI state and second TCI state) according to a TCI code point, the first and second PTRS ports are respectively associated with the DMRS antenna port with the smallest index among the DMRS antenna ports corresponding to the indicated first and second TCI states.

[0097] Thus, the NR specification is already studying the association between PTRS ports and DMRS ports in cases where the UE is configured with two PTRS ports and indicated with two TCI states.

[0098] However, research on the relationship between PTRS and DMRS ports has not yet been conducted for other cases, such as cases where the UE is configured with one PTRS port and indicated with two TCI states, cases where the UE is configured with two PTRS ports and indicated with one TCI state, and cases where no TCI is indicated at all (or if indicated, it cannot be used properly). Without clearly defining these relationships, it is impossible to properly achieve spatial diversity gain and high-rank transmission when using multiple panels / TRPs, raising concerns that the increase in communication throughput may be suppressed.

[0099] Therefore, the inventors of this invention conceived of an association between PTRS and DMRS ports that can handle situations involving the use of multiple panels / TRPs.

[0100] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0101] Furthermore, in this disclosure, the following terms can be interchanged: panel, uplink (UL) transmitting entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, specific antenna port (e.g., DeModulation Reference Signal (DMRS) port), specific antenna port group (e.g., DMRS port group), specific group (e.g., Code Division Multiplexing (CDM) group, specific reference signal group, CORESET group), etc. Additionally, the panel identifier (Identifier (ID)) and panel can also be interchanged. The TRP ID and TRP can also be interchanged.

[0102] Furthermore, in this disclosure, NCJT, NCJT using multiple TRPs, multiple PDSCH using NCJT, multiple PDSCH, and multiple PDSCH from multiple TRPs can be interchanged. Additionally, multiple PDSCH can mean multiple PDSCHs with at least a portion (e.g., 1 symbol) of overlapping time resources, or multiple PDSCHs with all (e.g., all symbols) of overlapping time resources. That is, the UE can receive multiple PDSCHs in repeated timing intervals or receive them simultaneously.

[0103] Furthermore, in this disclosure, the UE is configured with n (e.g., n = 1, 2, ...) PTRS ports, which may also mean that the UE is configured to utilize n PTRS ports.

[0104] Furthermore, in this disclosure, the association of PTRS ports and DMRS ports may also mean that these ports are conceived as QCLs for specific QCL types (e.g., types A and D).

[0105] Furthermore, in this disclosure, "TCI state ID = #X (X is an integer)" and "TCI state #X", "TCI#X", etc., can be interchanged. Additionally, "antenna port" and "port" can be interchanged.

[0106] (Wireless communication method)

[0107] <First Implementation Method>

[0108] The first implementation relates to the association of a PTRS port and a DMRS port when the UE is configured with a PTRS port and indicated with two TCI states (a first TCI state and a second TCI state).

[0109] A UE that has a PTRS port set and is indicated by two TCI states can also determine that the PTRS port is associated with at least one DMRS port from (1) to (3) below:

[0110] (1) The DMRS port with the smallest index among the DMRS ports corresponding to the first TCI state indicated.

[0111] (2) The DMRS port with the smallest index among the DMRS ports corresponding to the TCI state with the smallest TCI state ID among the two indicated TCI states.

[0112] (3) The DMRS port with the smallest index among the DMRS ports corresponding to the indicated TCI state associated with the higher level (which can also be replaced by rank, number of levels, etc.).

[0113] In addition, regarding the two indicated TCI states, if the ranks are the same, the UE can also determine that one of the PTRS ports mentioned above is associated with the DMRS port mentioned above (1) or (2).

[0114] Furthermore, in this disclosure, "specific," "smallest," "largest," "Mth from the smaller end" (M being an integer), and "Mth from the larger end" can be interchanged. "TCI code point" can also be interchanged with "code point of TCI field," "value of TCI field," etc.

[0115] Furthermore, in this disclosure, "first" can also be replaced by "initial", "the first in a TCI state set", etc., and "second" can also be replaced by "last", "the last in a TCI state set", etc.

[0116] Figure 3 This diagram illustrates an example of the association between the PTRS port and the DMRS port according to the first embodiment. In this example, the case where the UE is configured as a PTRS port and the indicated TCI state is a set of TCI states {TCI#3, TCI#1} will be described.

[0117] For example, in the case of (1) above, the UE can also determine that a set PTRS port is associated with the DMRS port with the smallest index among the DMRS ports corresponding to TCI#3.

[0118] In the case of (2) above, the UE can also determine that a set PTRS port is associated with the DMRS port with the smallest index among the DMRS ports corresponding to TCI#1.

[0119] According to the first embodiment described above, even when the number of PTRS ports set and the number of indicated TCI states applicable to multiple PDSCHs are different, the association between the PTRS ports associated with the multiple PDSCHs and the DMRS ports associated with the multiple PDSCHs can be properly determined.

[0120] <Second Implementation Method>

[0121] The second implementation involves the association of PTRS ports and DMRS ports when the UE is configured with two PTRS ports (a first PTRS port and a second PTRS port) and is indicated in a TCI state.

[0122] A UE configured with two PTRS ports can also determine the number of PTRS ports that are actually received (or actually attempted to receive) between those two PTRS ports.

[0123] For example, the UE can also determine the actual PTRS port received based on at least one of the following (A) and (B):

[0124] (A) The number of indicated TCI states,

[0125] (B) The number of CDM groups associated with the indicated TCI status.

[0126] In the case of (A) above, if a UE with two PTRS ports is indicated with a TCI state, it can receive the PTRS port associated with the DMRS port with the smallest index among the DMRS ports corresponding to the indicated TCI state (e.g., the first PTRS port), or it can not receive the other PTRS ports (e.g., the second PTRS port).

[0127] Furthermore, in the case of (A) above, if a UE with two PTRS ports is indicated with two TCI states, it is also conceivable that the first and second PTRS ports are associated with the DMRS antenna port with the smallest index among the DMRS ports corresponding to the first and second indicated TCI states, and receive each PTRS port.

[0128] In the case of (B) above, if a UE with two PTRS ports is indicated with a TCI state corresponding to a CDM group, it can receive the PTRS port associated with the DMRS antenna port with the smallest index among the DMRS ports corresponding to the CDM group of the indicated TCI state (e.g., the first PTRS port), or it can not receive the other PTRS ports (e.g., the second PTRS port).

[0129] Furthermore, in the case of (B) above, if a UE with two PTRS ports is instructed to a TCI state corresponding to two CDM groups (first CDM group and second CDM group), it can be assumed that the first and second PTRS ports are associated with the DMRS port with the smallest index among the DMRS ports corresponding to the first CDM group and the second CDM group, respectively, and receive each PTRS port.

[0130] According to the second embodiment described above, even when the number of set PTRS ports and the number of indicated TCI states applicable to multiple PDSCHs are different, the association between the PTRS ports associated with the multiple PDSCHs and the DMRS ports associated with the multiple PDSCHs can be appropriately determined.

[0131] <Third Implementation Method>

[0132] The third embodiment relates to the following PTRS, namely, a PTRS transmitted for the PDSCH when the time offset (scheduling offset) between the reception of the DL DCI and the reception of the PDSCH corresponding to the DCI is less than a scheduling offset threshold. The PTRS in the third embodiment can be replaced with: a PTRS transmitted for the PDSCH when the scheduling offset is less than the scheduling offset threshold.

[0133] Furthermore, the scheduling offset can be either common regardless of the TRP or different for each TRP. Additionally, the scheduling offset threshold can also be either common regardless of the TRP or different for each TRP.

[0134] Here, when the scheduling offset is less than the scheduling offset threshold, the UE is assumed to be in the TCI state or QCL (QCL assumption) applicable to PDSCH (PDSCH DMRS), which can also be referred to as the default TCI state. The default TCI state can also be used interchangeably with default QCL, default QCL assumption, etc. The following refers to this TCI state or QCL (QCL assumption) as the default TCI state, but the name is not limited to this.

[0135] Furthermore, the definition of the default TCI state is not limited to this. The default TCI state can be, for example, the TCI state envisioned for a certain channel / signal (e.g., PDSCH) when the TCI state / QCL specified by DCI cannot be used, or the TCI state / QCL envisioned when it is not specified (or set).

[0136] The UE can also determine the default TCI state (one or two default TCI states) of one or both of the multiple PDSCHs scheduled using a single PDCCH based on at least one of the following:

[0137] (a) The same rules as Rel.15NR (QCL assumption for the CORESET associated with the smallest CORESET-ID in the latest time slot);

[0138] (b) The QCL concept of the single PDCCH described above;

[0139] (c) In the TCI state corresponding to the TCI code point specified by the TCI field of the single PDCCH above, the TCI state ID associated with the corresponding panel (in other words, the TCI state of the corresponding panel represented by the TCI field).

[0140] (d) The TCI state corresponding to the specific TCI code point that can be specified by the TCI field of the single PDCCH mentioned above;

[0141] (e) Among all TCI states corresponding to the code point that can be specified by the TCI field of the single PDCCH described above, the TCI state with respect to the specific TCI state ID of the corresponding panel.

[0142] In addition, the "specific TCI code point" in (d) above can be, for example, the smallest TCI code point among TCI code points representing any number of TCI states (that is, among all TCI code points), or the smallest TCI code point among TCI code points representing two TCI states.

[0143] In addition, the Xth (X is an integer) code point can be replaced either with the Xth TCI state activated by MAC CE for PDSCH (or multiple PDSCH) (e.g., UE-specific PDSCH activated / deactivated by TCI state MAC CE), or with the Xth TCI state for PDSCH set by RRC signaling.

[0144] The “all TCI states corresponding to the code points that can be specified by ~” in (e) above can mean either all TCI states activated by MACCE or all TCI states set for PDSCH by RRC signaling.

[0145] When a UE determines n default TCI states in association with the aforementioned multiple PDSCHs, it can also be said that the UE has n default TCI states. If there are n TCI states that correspond to at least one of (a) to (e) above, it can also mean that the UE has n default TCI states.

[0146] In the third embodiment, a UE with two PTRS ports and two default TCI states can also be determined to be associated with the DMRS antenna port with the smallest index among the DMRS antenna ports corresponding to the first and second default TCIs, respectively.

[0147] By replacing the content of the indicated TCI state in the first embodiment with the default TCI state, a UE that has a PTRS port set and has two default TCI states can also be determined to be associated with a specific DMRS port.

[0148] By replacing the content of the indicated TCI state in the second embodiment with the default TCI state, a UE with two PTRS ports set and a default TCI state can also be determined to be associated with a specific DMRS port.

[0149] According to the third embodiment described above, even if the number of PTRS ports set and the number of default TCI states applicable to multiple PDSCHs are the same or different, the association between the PTRS ports associated with the multiple PDSCHs and the DMRS ports associated with the multiple PDSCHs can be properly determined.

[0150] <Other Implementation Methods>

[0151] Alternatively, the UE can also consider that a case where a PTRS port is configured and two TCI states are indicated, as described in the first embodiment, is an erroneous case. In other words, a UE configured with one PTRS port can also expect to be indicated with two TCI states.

[0152] Furthermore, the UE can also consider that a case where two PTRS ports are configured and one TCI state is indicated, as described in the second embodiment, is an erroneous case. In other words, a UE with two PTRS ports configured can also disregard the possibility of being indicated with two TCI states.

[0153] Furthermore, while the above embodiments illustrate the relationship between the DL PTRS port and the DL DMRS port, they are not limited thereto. In the above embodiments, PTRS can also be replaced with, for example, UL PTRS, and DMRS can also be replaced with UL DMRS. Additionally, one or both of PTRS and DMRS can be replaced with other reference signals.

[0154] Furthermore, the above embodiments illustrate an example of a single PDCCH, but the embodiments of this disclosure can also be applied to multiple PDCCHs.

[0155] The DMRS port group disclosed herein may also include at least one of the DMRS port groups of PDSCH, PDCCH, PBCH, and other channels.

[0156] (Wireless Communication System)

[0157] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. In this wireless communication system, communication is performed using one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0158] Figure 4 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP).

[0159] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0160] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0161] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., dual connectivity between MN and SN, both of which are NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0162] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0163] User terminal 20 can also connect to at least one of the multiple base stations 10. User terminal 20 can also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0164] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). Furthermore, the frequency bands and definitions of FR1 and FR2 are not limited to these; for example, FR1 can also correspond to a frequency band higher than FR2.

[0165] In addition, user terminal 20 can also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) to communicate in each CC.

[0166] Multiple base stations 10 can also be connected via wired (e.g., fiber optic, X2 interface, etc., conforming to the Common Public Radio Interface (CPRI)) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, base station 11, which is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) host, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0167] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may also include at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC).

[0168] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0169] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0170] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used for the wireless access methods of UL and DL.

[0171] In the wireless communication system 1, the downlink channel can also be a shared downlink channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), or a downlink control channel (Physical Downlink Control Channel (PDCCH)) shared by each user terminal 20.

[0172] In addition, in the wireless communication system 1, the uplink channel can also be an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), or a random access channel (Physical Random Access Channel (PRACH)) shared by each user terminal 20.

[0173] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. Furthermore, the Master Information Block (MIB) can be transmitted via the PBCH.

[0174] Lower-layer control information can also be transmitted via PDCCH. This lower-layer control information may also include downlink control information (DCI) that includes scheduling information for at least one of PDSCH and PUSCH.

[0175] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can also be replaced with DL data, and PUSCH can also be replaced with UL data.

[0176] In PDCCH detection, a Control Resource Set (CORESET) and a search space can be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0177] A search space can also correspond to one or more PDCCH candidates that meet one or more aggregation levels. One or more search spaces can also be called a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" used in this disclosure can be used interchangeably.

[0178] The PUCCH can also transmit uplink control information (uplink control information (UCI)) that includes at least one of the following: Channel State Information (CSI), delivery confirmation information (e.g., also known as Hybrid Automatic Repeat Request ACK / Acknowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). The PRACH can also transmit random access preambles used for establishing a connection with the cell.

[0179] Furthermore, in this disclosure, downlink, uplink, etc., can be represented without the prefix "link". Additionally, the prefix "physical" can be omitted from the beginning of various channels.

[0180] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. In wireless communication system 1, as DL-RS, cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), and phase tracking reference signals (PTRS) can also be transmitted.

[0181] Synchronization signals can be at least one of, for example, the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. Additionally, SS, SSB, etc., can also be called reference signals.

[0182] Furthermore, in wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (SRS), demodulation reference signals (DMRS), etc. Additionally, DMRS can also be referred to as user terminal-specific reference signals (UE-specific reference signals).

[0183] (Base station)

[0184] Figure 5 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission line interface 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission line interface 140 may each be provided in more than one form.

[0185] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the base station 10 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0186] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0187] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of radio resources.

[0188] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 can be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0189] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0190] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0191] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0192] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of the transmitting beam and the receiving beam.

[0193] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, process the data and control information obtained from the control unit 110 through the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), and the Medium Access Control (MAC) layer (e.g., HARQ retransmission control) to generate a bit string to be transmitted.

[0194] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0195] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0196] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the signals of the wireless frequency band received by the transmitting and receiving antenna 130 into the baseband signal.

[0197] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and acquire user data, etc.

[0198] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 110.

[0199] The transmission path interface 140 can also send and receive signals (backhaul signaling) with devices included in the core network 30, other base stations 10, etc., to acquire and transmit user data (user plane data), control plane data, etc. for user terminal 20.

[0200] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of the transmitting and receiving unit 120, the transmitting and receiving antenna 130 and the transmission path interface 140.

[0201] In addition, the transmitting and receiving unit 120 can also transmit one or both of multiple Physical Downlink Shared Channels (PDSCHs) (multiple PDSCHs) scheduled based on a single downlink control information (single PDCCH).

[0202] (User terminal)

[0203] Figure 6 This diagram illustrates an example of the structure of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Alternatively, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided as one or more.

[0204] Furthermore, in this example, the functional blocks that mainly represent the characteristic parts of this embodiment are shown. The user terminal 20 can also be conceived to have other functional blocks required for wireless communication. Some of the processing of each unit described below can also be omitted.

[0205] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0206] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0207] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0208] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0209] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0210] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0211] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0212] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on data and control information obtained from the control unit 210, and generate a bit string to be transmitted.

[0213] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0214] Furthermore, the application of DFT processing can be based on the transform precoding settings. For a certain channel (e.g., PUSCH), if transform precoding is enabled, the transmit / receive unit 220 (transmit processing unit 2211) may perform DFT processing as the aforementioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmit / receive unit 220 (transmit processing unit 2211) will not perform DFT processing as the aforementioned transmission processing.

[0215] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0216] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, and demodulate the signals of the wireless frequency band received by the transmitting and receiving antenna 230 into the baseband signal.

[0217] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to obtain user data.

[0218] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 210.

[0219] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230.

[0220] Furthermore, the control unit 210 can determine the relationship between the PTRS ports associated with the PDSCH and the DeModulation Reference Signal (DMRS) ports associated with the multiple PDSCHs, even if the number of the set Phase Tracking Reference Signal (PTRS) ports and the number of indicated Transmission Configuration Indication states (TCI states) applicable to multiple Physical Downlink Shared Channels (PDSCHs) (multiple PDSCHs) are different.

[0221] The transmitting and receiving unit 220 can also receive the multiple PDSCHs based on a single downlink control information (single PDCCH).

[0222] When the number of PTRS ports set is 1 and the number of indicated TCI states or the number of default TCI states is 2, the control unit 210 can also determine that the PTRS port is associated with the DMRS port with the smallest index among the DMRS ports corresponding to the first indicated TCI state (refer to (1) of the first embodiment).

[0223] When the number of PTRS ports set is 1 and the number of indicated TCI states or the number of default TCI states is 2, the control unit 210 may also determine that it is associated with the DMRS port with the smallest index among the PTRS ports corresponding to the indicated TCI states with respect to higher rank (refer to (3) of the first embodiment).

[0224] When the number of PTRS ports set is 2, the control unit 210 can also determine the actual number of PTRS ports received based on the number of indicated TCI states or the number of default TCI states (see the second embodiment).

[0225] When the number of PTRS ports set is 2, the control unit 210 may also determine the number of PTRS ports actually received based on the number of indicated TCI states or the number of code division multiplexing (CDM) groups associated with the default TCI state (refer to (B) of the second embodiment).

[0226] (Hardware Structure)

[0227] Furthermore, the block diagrams used in the description of the above embodiments represent functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices, and implementing it using multiple devices. Functional blocks can also be implemented using software combinations of the aforementioned single device or multiple devices.

[0228] Here, the functions include judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, structuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that performs the sending function can also be called a transmitting unit or a transmitter. As described above, the implementation method is not particularly limited.

[0229] For example, the base station, user terminal, etc. in one embodiment of this disclosure can also function as a computer for processing the wireless communication method of this disclosure. Figure 7 This diagram illustrates an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0230] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include some of the apparatuses.

[0231] For example, only one processor 1001 is illustrated, but there can be multiple processors. Furthermore, processing can be executed by one processor, or by two or more processors simultaneously, sequentially, or using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0232] The functions of the base station 10 and the user terminal 20 are implemented, for example, by reading specific software (programs) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations, controls communication via the communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage device 1003.

[0233] The processor 1001 enables the operating system to operate and controls the computer as a whole. The processor 1001 may also be configured as a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least some of the control unit 110 (210), the transmit / receive unit 120 (220), etc. described above may also be implemented by the processor 1001.

[0234] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program is used that causes the computer to perform at least a portion of the operations described in the above embodiments. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and similar implementations can be made for other functional blocks.

[0235] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of read-only memory (ROM), erasable programmable ROM (EPROM), electrically EPROM (EEPROM), random access memory (RAM), and other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0236] Storage 1003 is a computer-readable recording medium, and may also consist of at least one of the following: floppy disk, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM, etc.), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, and other suitable storage media. Storage 1003 may also be referred to as an auxiliary storage device.

[0237] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. The communication device 1004 may, for example, be configured to include a high-frequency switch, duplexer, filter, frequency synthesizer, etc., to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the aforementioned transmitting and receiving unit 120 (220) and transmitting and receiving antenna 130 (230) may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented such that the transmitting unit 120a (220a) and the receiving unit 120b (220b) are physically or logically separated.

[0238] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch panel).

[0239] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communication of information. The bus 1007 can be configured using a single bus or different buses between each device.

[0240] Furthermore, the base station 10 and the user terminal 20 can also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field-programmable gate array (FPGA), and can use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0241] (Modified Example)

[0242] Furthermore, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Additionally, a signal may also be a message. A reference signal may also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0243] A radio frame can also consist of one or more periods (frames) in the time domain. Each of these periods (frames) that constitutes a radio frame can also be called a subframe. Furthermore, a subframe can also consist of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0244] Here, the parameter set (numerology) can also be communication parameters applied to at least one of the transmitting and receiving parties of a signal or channel. For example, the parameter set (numerology) can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0245] A time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Furthermore, a time slot can also be a time unit based on a set of parameters.

[0246] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0247] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also use other names corresponding to them. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols used in this disclosure can be used interchangeably.

[0248] For example, a single subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a single time slot or a single mini-time slot can also be called a TTI. That is to say, at least one of a subframe or a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Furthermore, the unit representing a TTI can also be called a time slot, mini-time slot, etc., instead of a subframe.

[0249] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (bandwidth, transmit power, etc. available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0250] TTI can be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., or it can be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than that TTI.

[0251] Furthermore, while one time slot or one mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. In addition, the number of time slots (number of mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0252] A Time Interval (TTI) with a duration of 1 ms can also be called a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI can also be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0253] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1 ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of less than long TTIs but more than 1 ms.

[0254] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same as the parameter set (numerology), for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set (numerology).

[0255] In addition, RBs can also contain one or more symbols in the time domain, and can be the length of one time slot, one mini-time slot, one subframe, or one TTI. One TTI, one subframe, etc., can also be composed of one or more resource blocks.

[0256] In addition, one or more RBs can also be referred to as Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0257] In addition, a resource block can also consist of one or more resource elements (REs). For example, one RE can also be a radio resource area consisting of one subcarrier and one symbol.

[0258] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of contiguous common resource blocks (RBs) used for a certain parameter set (numerology) in a certain carrier. Here, common RBs can also be determined by indexing RBs based on a common reference point of that carrier. PRBs can also be defined within a BWP and appended with a sequence number within that BWP.

[0259] A BWP can also include a UL BWP (BWP used by UL) and a DL BWP (BWP used by DL). For a UE, one or more BWPs can be set within a single carrier.

[0260] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Additionally, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0261] Furthermore, the structures of radio frames, subframes, time slots, mini-time slots, and symbols described above are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots per subframe or per radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc., can be varied in many ways.

[0262] Furthermore, the information, parameters, etc., described in this disclosure can be represented using absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0263] The names used for parameters, etc., in this disclosure are not limiting names at any point. Furthermore, the formulas, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these channels and information elements are not limiting names at any point.

[0264] The information, signals, etc., described in this disclosure can also be represented using one of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which can be mentioned throughout the foregoing description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0265] Furthermore, information and signals can be output from higher to lower levels, and from lower to higher levels, at least in one of these directions. Information and signals can also be input and output via multiple network nodes.

[0266] Input and output information and signals can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals can be overwritten, updated, or recorded. Output information and signals can also be deleted. Input information and signals can also be sent to other devices.

[0267] The notification of information is not limited to the methods / implementations described in this disclosure, and other methods may also be used. For example, the notification of information in this disclosure may also be implemented through physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), higher layer signaling (e.g., radio resource control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), medium access control (MAC) signaling), other signals, or combinations thereof.

[0268] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, the MAC Control Element (CE).

[0269] Furthermore, notification of specific information (e.g., a notification that “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information or by providing other information).

[0270] The determination can be made by a value represented by 1 bit (0 or 1), by a true or false value (boolean), or by a comparison of values ​​(e.g., by comparison with a specific value).

[0271] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0272] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, optical fiber, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0273] The terms “system” and “network” as used in this disclosure are used interchangeably. “Network” may also mean devices included in a network (e.g., base stations).

[0274] In this disclosure, the terms "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "transmission configuration indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beamwidth", "beam angle", "antenna", "antenna element", and "panel" are used interchangeably.

[0275] In this disclosure, the terms "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access Point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Panel", "Cell", "Sector", "Cell Group", "Carrier", and "Component Carrier" are used interchangeably. Base stations are also sometimes referred to as macrocells, small cells, femtocells, picocells, etc.

[0276] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its overall coverage area can be divided into several smaller areas, each of which can also be served by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​the base station and at least one of the base station subsystems providing communication services within that coverage area.

[0277] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0278] Mobile stations are also sometimes referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or some other appropriate terms.

[0279] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Furthermore, at least one of the base station and the mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. This mobile body can be a vehicle (e.g., a car, an airplane, etc.), a mobile body moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Additionally, at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0280] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, the various methods / implementations of this disclosure can be applied to a structure where the communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, the user terminal 20 can also be configured to have the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, uplink channel, downlink channel, etc., can also be replaced with side channel.

[0281] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, the base station 10 can also be configured to have the functions of the user terminal 20 described above.

[0282] In this disclosure, operations purported to be performed by the base station may sometimes be performed by its upper node, depending on the circumstances. In a network containing one or more network nodes having a base station, various operations for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[0283] The various methods / implementations described in this disclosure can be used individually, in combination, or switched during execution. Furthermore, the processing procedures, timing sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as there are no contradictions. For example, for the methods described in this disclosure, various steps are indicated using an illustrative order, and the order is not limited to the specific order indicated.

[0284] The various methods / implementations described in this disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Futuregeneration radio access (FX), Global System for Mobile Communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from them. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0285] Unless otherwise expressly stated, the use of the word "based on" in this disclosure does not imply "based on only". In other words, the use of the word "based on" implies both "based on only" and "based on at least".

[0286] Any reference to elements using the designations "first," "second," etc., as used in this disclosure is not intended to definitively limit the quantity or order of these elements. These designations are used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, references to "first" and "second" elements do not imply that only two elements can be used, or that in some form the first element must precede the second element.

[0287] The term "determining" as used in this disclosure sometimes encompasses a wide variety of operations. For example, "determining" can also be considered as making a "determination" regarding judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), ascertaining, etc.

[0288] In addition, "judgment (decision)" can also be regarded as the situation of making "judgment (decision)" on receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0289] Furthermore, "judgment (decision)" can also be seen as making "judgments (decisions)" regarding resolving, selecting, choosing, establishing, and comparing. In other words, "judgment (decision)" can also be seen as making "judgments (decisions)" regarding certain operations.

[0290] In addition, "judgment (decision)" can also be replaced with "assuming", "expecting", "considering", etc.

[0291] As used in this disclosure, the terms "connected," "coupled," or any variations thereof mean any direct or indirect connection or combination between two or more elements, including the presence of one or more intermediate elements between two elements that are "connected" or "coupled." The combination or connection between elements can be physical, logical, or a combination thereof. For example, "connected" can also be replaced with "access."

[0292] In this disclosure, when connecting two elements, it is possible to consider using more than one wire, cable, printed electrical connection, etc. to be "connected" or "combined" with each other, and as some non-limiting and non-inclusive examples, electromagnetic energy with wavelengths in the wireless frequency domain, microwave domain, and optical (visible and invisible) domain can be used to be "connected" or "combined" with each other.

[0293] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0294] In this disclosure, the terms "include," "including," and variations thereof are used in the same way as the term "comprising," meaning inclusive. Furthermore, the term "or" as used in this disclosure means not XOR.

[0295] In this disclosure, for example, where articles are added through translation, such as in English (e.g., a, an, and the), this disclosure may also include cases where the noun following these articles is in a plural form.

[0296] The invention disclosed herein has been described in detail above. However, it will be apparent to those skilled in the art that the invention is not limited to the embodiments described herein. The invention can be implemented as modifications and variations without departing from the spirit and scope of the invention as determined by the claims. Therefore, the description herein is for illustrative purposes only and has no limiting meaning regarding the invention.

Claims

1. A terminal, characterized in that, have: The control unit determines the association between the PTRS ports associated with the multiple UL channels and the DMRS ports associated with the multiple UL channels when the number of set phase tracking reference signal PTRS ports is different from the number of indicated transmit setting indication states (TCI states) applicable to multiple uplink channels (i.e., multiple UL channels). as well as The transmitting unit transmits PTRS based on the PTRS port. When the number of PTRS ports set is 1 and the number of indicated TCI states is 2, the control unit determines that the set PTRS port is associated with a specific DMRS port. The specific DMRS port is used to transmit the uplink shared channel PUSCH, and is a DMRS port with a specific index in the DMRS ports corresponding to the first TCI state in the indicated TCI state associated with higher layers.

2. A wireless communication method for a terminal, comprising: The step of determining the association between the PTRS port associated with the multiple UL channel and the DMRS port associated with the multiple UL channel when the number of the set phase tracking reference signal PTRS ports is different from the number of indicated transmit setting indication states (TCI states) applicable to multiple uplink channels (i.e., multiple UL channels). The steps of sending PTRS based on the PTRS port; and When the number of configured PTRS ports is 1 and the number of indicated TCI states is 2, the step of determining that the configured PTRS port is associated with a specific DMRS port is... The specific DMRS port is used to transmit the uplink shared channel PUSCH, and is a DMRS port with a specific index in the DMRS ports corresponding to the first TCI state in the indicated TCI state associated with higher layers.

3. A base station, comprising: The control unit configures the number of PTRS ports to be configured to differ from the number of indicated transmit setting indication states (TCI states) applicable to multiple uplink channels (i.e., multiple UL channels); and The receiving unit receives PTRS based on the PTRS port, wherein the PTRS port is the PTRS port whose association with the multiple UL channels is determined and whose association with the decall reference signal DMRS port associated with the multiple UL channels is determined. When the number of PTRS ports set is 1 and the number of indicated TCI states is 2, the set PTRS port is associated with a specific DMRS port. The specific DMRS port is used to transmit the uplink shared channel PUSCH, and is a DMRS port with a specific index in the DMRS ports corresponding to the first TCI state in the indicated TCI state associated with higher layers.

4. A system comprising a terminal and a base station, The terminal has: The control unit, when the number of set phase tracking reference signal (PTRS) ports differs from the number of indicated transmit setting indication states (TCI) states applicable to multiple uplink channels (i.e., multiple UL channels), determines the association between the PTRS ports associated with the multiple UL channels and the demodulation reference signal (DMRS) ports associated with the multiple UL channels; and The transmitting unit transmits PTRS based on the PTRS port. When the number of PTRS ports set is 1 and the number of indicated TCI states is 2, the control unit determines that the set PTRS port is associated with a specific DMRS port. The specific DMRS port is used to transmit the uplink shared channel PUSCH, and is a DMRS port with a specific index in the DMRS ports corresponding to the first TCI state in the indicated TCI state associated with higher layers. The base station has: The receiving unit receives the PTRS.

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