Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a reception unit that receives first downlink control information (DCI) based on a sequence without using a demodulation reference signal (DMRS); and a control unit that, on the basis of the first DCI, controls reception of a second DCI using a DMRS. According to one mode of the disclosure, the resource efficiency can be improved.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. 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 study also explored subsequent systems to LTE (e.g., also known as the 5th generation mobile communication system (5G), 5G+, the 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] Existing technical documents

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300 V8.12.0 “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] In future wireless communication systems (e.g., NR), for example, from the perspective of improving resource efficiency, there is research on using sequence-based transmission methods that do not use demodulation reference signals (DMRS) in specific channels (e.g., Physical Downlink Control Channel (PDCCH) / Physical Downlink Shared Channel (PDSCH) / Physical Uplink Shared Channel (PUSCH)).

[0009] However, the specific methods used have not been fully studied. This lack of research raises concerns that it may hinder improvements in resource efficiency and suppress increases in communication throughput.

[0010] Therefore, one of the purposes of this disclosure is to provide terminals, wireless communication methods, and base stations that can improve resource efficiency.

[0011] Methods for solving problems

[0012] One embodiment of the present disclosure relates to a terminal comprising: a receiving unit for receiving a sequence-based first downlink control information (DCI) without using a demodulation reference signal (DMRS); and a control unit for controlling the reception of a second DCI using DMRS based on the first DCI.

[0013] Invention Effects

[0014] According to one method disclosed herein, resource efficiency can be improved. Attached Figure Description

[0015] Figure 1 This is a diagram representing an example of DCI (DMRS-based DCI) in the existing specifications.

[0016] Figure 2 This is a diagram representing an example of sequence-based DCI.

[0017] Figure 3 This is a diagram illustrating another example of sequence-based DCI.

[0018] Figure 4 This is a diagram illustrating another example of sequence-based DCI.

[0019] Figure 5 This is a diagram representing an example of sequence-based DCI resources and DMRS-based DCI resources.

[0020] Figure 6 This is a diagram illustrating an example of multiple PDCCH candidates / DCI candidates monitored by the UE.

[0021] Figure 7This diagram illustrates an example of a scenario where different information is transmitted on a sequence basis across multiple PDCCH candidates / DCI candidates.

[0022] Figure 8A / Figure 8B This is a diagram illustrating an example of screening PDCCH candidates / DCI candidates through sequence-based DCI.

[0023] Figure 9 This is a diagram illustrating an example of the correlation between sequence-based PDCCH information and phase rotation amount.

[0024] Figure 10A / Figure 10B / Figure 10C / Figure 10D This is a diagram illustrating an example of the generation and processing of a sequence-based PDCCH transmission signal.

[0025] Figure 11 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0026] Figure 12 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0027] Figure 13 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0028] Figure 14 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment.

[0029] Figure 15 This is a diagram illustrating an example of a vehicle according to one embodiment. Detailed Implementation

[0030] (Sequence-based PUCCH)

[0031] In existing wireless communication systems (e.g., up to Rel. 15-17), the transmission methods for the Physical Uplink Control Channel (PUCCH) are defined as follows: DMRS-based PUCCH (DMRS-based transmission or DMRS-based PUCCH) notifies the UCI by transmitting a UL signal, which is a UL signal that performs time division multiplexing (TDM) / frequency division multiplexing (FDM) on the demodulation reference signal (DMRS) and uplink control information (UCI); and sequence-based PUCCH (sequence-based transmission or sequence-based PUCCH) notifies the UCI by transmitting a UL signal, which is a UL signal that uses code resources associated with the UCI value without using DMRS.

[0032] For example, the former is PUCCH format 1 / 2 / 3 / 4, and the latter is PUCCH format 0.

[0033] The sequence-based PUCCH transmission uses code resources associated with UCI values ​​to transmit UL signals. The code resources are resources used in code division multiplexing (CDM) and can be at least one of a reference sequence, cyclic shift (CS) and orthogonal cover code (OCC). The CS in this disclosure can also be rewritten as other code resources such as phase rotation and OCC.

[0034] The reference sequence can be either a CAZAC (Constant Amplitude Zero Auto-Correlation) sequence (e.g., the Zadoff-chu sequence) or a sequence that follows a CAZAC sequence (CG-CAZAC (computer-generated CAZAC) sequence).

[0035] Information related to code resources (code resource candidate set, e.g. CS candidate set) can also be notified from the base station to the terminal (user terminal, user equipment) via higher layer signaling, physical layer signaling (e.g., downlink control information (DCI)) or a combination thereof.

[0036] Regarding sequence-based PUCCH, compared to DMRS-based PUCCH, DMRS has a lower resource ratio relative to PUCCH, thus improving resource efficiency in PUCCH transmission.

[0037] (Minimum quality guarantee in future wireless communication systems)

[0038] In existing wireless communication systems (e.g., up to Rel. 15-17), mobile communication using public networks is generally what is known as best-effort communication.

[0039] Such communication exhibits the following characteristics: communication operators cannot control the instantaneous increase in traffic volume. For example, the following problem exists: in densely populated environments such as concerts / stadiums, if traffic increases instantaneously / explosively, even the minimum level of communication cannot be guaranteed (e.g., initiating telephone calls or browsing web pages is impossible).

[0040] In existing wireless communication systems (e.g., up to Rel. 15-17), mission-critical use cases (e.g., Ultra-Reliable and Low Latency Communications (URLLC)) were investigated.

[0041] However, in cases where mission-critical communication services are considered to be conducted on public networks, the desired communication quality (e.g., throughput / latency / number of simultaneous connections, etc.) cannot be achieved when peripheral traffic increases as mentioned above, or when traffic within the mission-critical communication service increases.

[0042] Therefore, future wireless communication systems should seek mechanisms that guarantee minimum communication quality for both ordinary users and mission-critical use cases.

[0043] However, it is difficult to guarantee minimum quality with limited resources.

[0044] For example, if the number of temporary users is unknown, it is difficult to provide minimum quality assurance for all users using limited resources.

[0045] Furthermore, since the minimum quality that can be guaranteed varies depending on the performance / type of the device / UE, it is difficult to achieve the minimum quality guarantee of the service KPIs (Key Performance Indicators) required by any user.

[0046] Furthermore, since the quality of wireless communication can change constantly due to various factors, it is difficult to always guarantee specific performance KPIs (e.g., throughput / reliability).

[0047] Furthermore, due to limitations in the number of configurable base stations / transmitter / receiver points, or factors such as the surrounding communication environment, it is difficult to guarantee a specific quality in every location.

[0048] Here, as a method for minimum quality assurance for a large number of UEs, an efficient communication method for low data rate / low payload is being investigated.

[0049] More specifically, research is underway on: techniques / methods for low data rate / low payload communication even when resources available to be allocated to a single UE are limited, and techniques / methods for improving frequency utilization efficiency of resources (e.g., spatial multiplexing of channels / signals, sequence-based transmission), etc.

[0050] However, in existing wireless communication systems, it is not always possible to achieve communication with low data rates and low payloads.

[0051] Specifically, because sequence-based transmission methods in certain channels (e.g., Physical Downlink Control Channel (PDCCH) / Physical Downlink Shared Channel (PDSCH)) have not been fully studied, the ratio of DMRS resources to the resources of that specific channel can be high when the number of symbols in that channel is small. In this case, there is a concern about reduced resource efficiency.

[0052] Therefore, the inventors of this invention conceived of a method for achieving sufficient communication even when resources available to a single UE are limited, by specifying a sequence-based transmission method in a particular channel.

[0053] The embodiments disclosed herein will now be described in detail with reference to the accompanying drawings. The wireless communication methods described in each embodiment can be applied individually or in combination.

[0054] In this disclosure, "A / B" and "at least one of A and B" may be rewritten as each other. In addition, in this disclosure, "A / B / C" may also mean "at least one of A, B and C".

[0055] In this disclosure, terms such as notification, activation, deactivation, indication (or indication), selection, configuration, update, and determination can be overridden. Similarly, terms such as support, control, ability to control, operation, and ability to operate can also be overridden.

[0056] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-level parameters, fields, Information Elements (IE), settings, etc., can also be modified interchangeably. In this disclosure, Medium Access Control (MAC) elements (MAC ControlElement (CE)), update commands, activation / deactivation commands, etc., can also be modified interchangeably.

[0057] In this disclosure, higher-layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., positioning protocol messages (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP) messages, etc. from the core network), or a combination thereof.

[0058] In this disclosure, MAC signaling may also use, for example, a MAC Control Element (MACCE) or a MAC Protocol Data Unit (PDU). Broadcast information may also be, for example, a Master Information Block (MIB), a System Information Block (SIB), Minimum System Information (Remaining Minimum System Information (RMSI)), or Other System Information (OSI).

[0059] In this disclosure, physical layer signaling may also be, for example, downlink control information (DCI), uplink control information (UCI), etc.

[0060] In this disclosure, sequence-based, sequence-based transmission, sequence-based DL transmission, sequence-based DL data, sequence-based DCI, sequence-based PDCCH, and sequence-associated PDCCH can also be rewritten to each other.

[0061] In this disclosure, existing DCI, DMRS-based DCI, existing DCI, DMRS-based, existing standard PDCCH, DCI modulated using a specific modulation scheme, PDCCH associated with DCI modulated using a specific modulation scheme, PDCCH containing DMRS, and DMRS-based PDCCH can also be rewritten to each other.

[0062] (Wireless communication method)

[0063] Application Conditions in Sequence-Based DL Data

[0064] This document explains the DL data (DL information bits) that are transmitted using sequence-based methods, as well as the characteristics / application conditions of such sequence-based transmission.

[0065] [DL information bits]

[0066] Sequence-based DL information bits can be either DCI or a part of DCI.

[0067] [Channel Category]

[0068] The channel for sequence-based DL data can be PDCCH, PDSCH, PBCH, or other DL channels.

[0069] [Type of receiving terminal]

[0070] DL information bits can also be received only by UEs with specific UE capability information (UE capability) that are the objects of minimum quality assurance. The aforementioned specific UE capability information can indicate either support for sequence-based DL data or support for minimum quality assurance operations.

[0071] [DCI Applied]

[0072] The UE can receive information based on sequence for a specific DCI format, or it can receive information based on sequence for a DCI format with a Cyclic Redundancy Check (CRC) scrambled by a specific RNTI. In other words, a DCI format with a CRC scrambled by a specific DCI format / specific RNTI can also be used for sequence-based transmission. The specific DCI format and specific RNTI can be determined based on parameters set for the UE, or they can be predefined.

[0073] [UE state]

[0074] Sequence-based DL data can be supported either only in specific UE states or in all UE states. Specific UE states can be, for example, one or more of the following: RRC IDLE, RRC INACTIVE, other non-RRC connected states, and RRC connected states.

[0075] [Categories of DL Data]

[0076] Sequence-based DL data can be at least one of the following: indications of the ON / OFF of transmission / reception of a specific signal, indications of transmission / measurement timing, resource indications, information related to the UE's capabilities / status, and delivery confirmation information (e.g., also referred to as Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK), ACK / NACK, etc.), or other information. For example, at least a portion of the information notified via a portion of the DCI fields in any of the existing DCI formats can also be received / notified based on a sequence (sequence selection).

[0077] Waveform

[0078] The waveform of sequence-based DL data can be at least one of Orthogonal Frequency Division Multiplexing (OFDM), Discrete Fourier Transform (DFT)-spread(s)-Orthogonal Frequency Division Multiplexing (OFDM), pre-chirp, or other waveforms.

[0079] [other]

[0080] Sequence-based DL data can also be configured to be applied only when the DCI payload (information bits) or coding rate is below or above a specific value.

[0081] The information related to the features / application conditions of sequence-based transmission described above (e.g., which feature is present, which application condition is used, the specific DCI format / specific RNTI, the specific UE state, the specific value, etc.) can also be notified to the UE using RRC / MAC CE.

[0082] <Structure of sequence-based DL data>

[0083] Sequence-based DL data may also be received by / notified to the UE in accordance with at least one of the following (1) to (3).

[0084] (1) At least a portion of the information that is notified via a portion of the DCI field of any DCI format in the existing specification is received / notified using sequence-based transmission.

[0085] (2) At least a portion of the resource information (e.g., aggregation level / DCI format / control channel element (CCE) index, etc.) of any DCI format / search space set (SS) / CORESET / PDCCH in the existing specification is received / notified using sequence-based transmission.

[0086] (3) At least a portion of the information that is notified using a portion of the DCI fields of any of the existing DCI formats is received / notified using only sequence-based transmission.

[0087] The above (1) and (2) can also be applied simultaneously. In this case, at least a portion of the information notified by a portion of the DCI field of any DCI format in the existing specification, and at least a portion of the resource information of any DCI format / SS / CORESET / PDCCH in the existing specification can also be received / notified based on the sequence.

[0088] Figure 1 This diagram illustrates an example of DCI (DMRS-based DCI) reception in the existing specifications. DCI1 can also notify the UE of M bits of information.

[0089] Figure 2 This is a diagram illustrating an example of (1) above. Alternatively, sequence-based DCI2-1 can be the information communicated via DMRS-based DCI. Figure 1At least a part of the information of M bits notified by DCI1, that is, x (x < M) bits of information, is notified to the UE. DCI2-2 based on DMRS notifies the UE of M - x bits of information ( Figure 1 the information in the M bits of information notified by DCI1 that is other than the information notified by DCI2-1 based on the sequence) is notified to the UE. DCI2-1 based on the sequence can determine resources through higher-layer signaling or the like, or can be blindly decoded by the UE. DCI2-2 based on DMRS can also be blindly decoded by the UE.

[0090] Figure 3 FIG. is an example showing the above (2). It is also possible that DCI3-1 based on the sequence notifies the UE of information for determining DCI3-2 based on DMRS (for example, information related to the resources of DCI3-2 based on DMRS (which may be the same as the "information for screening PDCCH candidates" described later)), and DCI3-2 based on DMRS notifies the UE of M bits of information. DCI3-1 based on the sequence can determine resources through higher-layer signaling or the like, or can be blindly decoded by the UE. DCI3-2 based on DMRS can also be decoded according to the information of DCI3-1 based on the sequence. On the other hand, it may not be blindly decoded.

[0091] Figure 4 FIG. is an example showing the above (3). DCI4 based on the sequence can also notify the UE of at least a part of the information ( Figure 1 the information of M bits notified by DCI1) notified by DCI based on DMRS, that is, x bits of information.

[0092] In addition, DCI2-1 based on the sequence and DCI3-1 based on the sequence described above can also be received / notified using DMRS instead of the sequence.

[0093] In addition, for DCI2-1 based on the sequence, DCI2-2 based on DMRS, DCI3-1 based on the sequence, and DCI4 based on the sequence described above, a new DCI format can also be defined. The DCI format for DCI3-2 based on DMRS can also be associated with DCI based on the sequence (DCI3-1 based on the sequence). This association can be predefined or can be notified to the UE through RRC / MAC CE.

[0094] According to the above (1), it is possible to notify the UE in advance of a part of the information of DCI based on DMRS (for example, UL / DL allocation, the structure of the payload / DCI field, etc.) through DCI based on the sequence.

[0095] According to (2) above, since the UE only needs to attempt DMRS-based DCI detection in the resources indicated by sequence-based DCI, the number of monitored PDCCH candidates / DCI candidates can be reduced. In other words, the UE can also not monitor (blindly decode) PDCCH candidates related to DMRS-based DCI with a specific DCI format (e.g., the DCI format for DMRS-based DCI3-2 mentioned above) in resources other than those indicated by sequence-based DCI.

[0096] Based on the above (3), resource efficiency can be further improved.

[0097] In the case of (1) and / or (2) above, the UE may also envision the following relationship / restriction between the PDCCH associated with the sequence (which may also be rewritten as DCIX-1, PDCCH of DCIX-1, sequence-based DCI, sequence-based PDCCH, etc.) and the PDCCH associated with the DCI modulated using a specific modulation scheme (e.g., Quadrature Phase Shift Keying (QPSK)) or the PDCCH containing DMRS (which may also be rewritten as DCIX-2, PDCCH of DCIX-2, DCI based on DMRS, PDCCH based on DMRS, etc.).

[0098] [Frequency relationship between DCIX-1 and DCIX-2]

[0099] The UE can also be envisioned as having the following (i) and / or (ii) as frequency relationships (frequency direction restrictions, frequency resource associations) between DCIX-1 and DCIX-2.

[0100] (i) The CCE index of DCIX-1 is the same as the CCE index of DCIX-2, or the difference between their CCE indices is within a certain number (Y).

[0101] (ii) The physical resource block (PRB) assigned to DCIX-1 is the same as the PRB assigned to DCIX-2, or the difference between their PRBs is within a specific number (Y)RB.

[0102] [Time relationship between DCIX-1 and DCIX-2]

[0103] The UE can also be envisioned as having the following (iii) and / or (iv) as a time relationship (time direction restriction, time resource association) between DCIX-1 and DCIX-2.

[0104] (iii) The initial symbol of DCIX-2 is assigned after Z milliseconds (or can be rewritten as symbol or time slot, etc.) from the last symbol of DCIX-1.

[0105] (iv) The last symbol of DCIX-2 is allocated within Z milliseconds (or can be rewritten as symbol or time slot, etc.) from the first or last symbol of DCIX-1.

[0106] The relationships / restrictions in (i) to (iv) above can also be combined. In addition, the first / last code in (iii) / (iv) above can also be rewritten as any code (e.g., first, last, i-th (i is an integer) code).

[0107] In addition, the values ​​of Y and Z in (i) to (iv) above can be arbitrary values ​​that are predetermined, values ​​based on UE capability information, or values ​​based on set / indicated parameters (e.g., higher-level parameters).

[0108] Figure 5 This is a diagram illustrating one example of (iii) / (iv) above. Additionally, in Figure 5 In the period (Z) from the first / last symbol of DCIX-1 to the first / last symbol of DCIX-2, transmission and reception of specific channels (e.g., PDSCH / PUSCH) may not be performed.

[0109] <Methods for Receiving Sequence-Based DL Data>

[0110] The UE can also receive sequence-based DL data while searching for it from the PDCCH candidates. In this disclosure, the PDCCH candidates and DCI candidates can also be rewritten.

[0111] Regarding PDCCH candidates related to sequence-based DL data, at least one of the following can be specified by the specification or notified to the UE using RRC / MAC CE, according to (or per) RNTI / SS / CORESET / aggregation level.

[0112] • Periodicity / Symbol / Time Slot / Time Offset

[0113] • Sequence length / Sequence format

[0114] • Start Resource Element (RE) / Start Resource Block (RB) / Start Resource Block Group (RBG) / Start Subband / Start Symbol / Start Time Slot

[0115] • Number of REs / Number of RBs / Number of RBGs / Number of Subbands / Number of Symbols / Number of Time Slots

[0116] • Density of each RB / RBG / subband / symbol / slot

[0117] • Bitmap indication of RE / RB / RBG / subband / symbol / slot unit

[0118] The UE may also use at least one of the following receiving methods 1 to 3 to receive sequence-based DL data.

[0119] [Receiving Method 1]

[0120] Whether a PDCCH candidate can be received can also be determined by the UE based on whether the measurement value in the PDCCH candidate exceeds a threshold.

[0121] Figure 6 This diagram illustrates an example of multiple PDCCH candidates monitored by the UE. In this example, the same sequence-based DCIX can be transmitted in three PDCCH candidates. Figure 6 In this configuration, the UE can also attempt to receive each PDCCH candidate in the order of candidate 1 of DCIX, candidate 2 of DCIX, and candidate 3 of DCIX. However, the order in which the PDCCH candidates are attempted is not limited to this order. Furthermore, the UE can also attempt to receive multiple PDCCH candidates simultaneously.

[0122] The number of PDCCH candidates / maximum number / order of receiving trials can be predetermined or determined based on parameters notified via RRC / MAC CE.

[0123] Regarding the above measurements, at least one of the following metrics can be predetermined, or the UE can be notified via RRC / MAC CE which metric to use.

[0124] ·RSRP / RSRQ / SINR

[0125] Autocorrelation / Crosscorrelation

[0126] In addition, the above thresholds can be predetermined or notified to the UE using RRC / MAC CE.

[0127] [Receiving Method 2]

[0128] Multiple PDCCH candidates can also contain different information.

[0129] Figure 7This diagram illustrates an example of a scenario where different information is received / notified based on a sequence across multiple PDCCH candidates. Alternatively, x bits of information could be notified in DCI candidate 1, and y bits of information could be notified in DCI candidate 3. Furthermore, the PDCCH candidate can be determined based on each detected piece of information. Information related to which information is notified in which PDCCH candidate can also be notified to the UE via RRC / MAC CE.

[0130] Regarding PDCCH candidates, either sequence-based PDCCH and existing specification PDCCH can be combined, or at least one of aggregation level, CCE index, symbol, time slot, RNTI, and DCI format can be used as information to filter PDCCH candidates in existing specification PDCCH, and this information is notified to the UE through sequence-based PDCCH.

[0131] The PDCCH candidates in the existing PDCCH of the monitored object (a set of PDCCH candidates corresponding to at least one of a certain aggregation level, CCE index, symbol, time slot, RNTI, and DCI format) can also be filtered / limited / determined into more than one candidate based on the information used to filter PDCCH candidates. If the above set is filtered / limited / determined into one candidate based on the information used to filter PDCCH candidates, the UE may also not monitor (blindly decode) the PDCCH candidates other than that one candidate in the above set, and attempt to receive only that one candidate. If the above set is filtered / limited / determined into multiple candidates based on the information used to filter PDCCH candidates, the UE may also monitor (blindly decode) those multiple candidates in the above set, without monitoring other candidates.

[0132] Figure 8A and Figure 8B This is a diagram illustrating an example of DCI candidate selection. Figure 8A In this process, the UE attempts to receive each DCI candidate in the following order: existing DCI candidate 1, existing DCI candidate 2, existing DCI candidate 3, and existing DCI candidate 4. On the other hand, in... Figure 8B In this process, existing DCI candidates are screened using sequence-based DCI. The UE does not attempt to receive existing DCI candidate 1 and existing DCI candidate 3, but instead attempts to receive each DCI candidate in the order of existing DCI candidate 2 and existing DCI candidate 4.

[0133] PDCCH candidates can also be determined for each of the sequence-based DCI and the DCI modulated using a specific modulation scheme (e.g., QPSK).

[0134] The RNTI used for detecting different DCIs (e.g., DCIs modulated using QPSK) can also be determined based on a specific DCI (e.g., sequence-based DCI).

[0135] [Receiving Method 3]

[0136] Alternatively, in sequence-based DL data, information related to resources / sequences can be notified to the UE in advance, and the UE can receive DCI in the notified resources / imagine the notified sequence.

[0137] The UE may be specified by the specification based on at least one of the following according to the DL information bits of the PDCCH candidate / DCI candidate / RNTI / SS / CORESET / aggregation level, or may be notified by at least one of the following through RRC / MAC CE.

[0138] • RE / RB / RBG level offset / symbol / slot / time offset

[0139] • Sequence length / Sequence format

[0140] • Start RE / Start RB / Start RBG / Start Subband / Start Symbol / Start Time Slot

[0141] • Number of REs / Number of RBs / Number of RBGs / Number of Subbands / Number of Symbols / Number of Time Slots

[0142] • Density of each RB / RBG / subband / symbol / slot

[0143] • Bitmap indication of RE / RB / RBG / subband / symbol / slot unit

[0144] Sequence Generation in Sequence-Based DL Data

[0145] The sequence generation method in sequence-based DL data can also be specified. The base station can also transmit sequence-based PDCCH based on a reference sequence. Specifically, the base station can also generate a sequence-based PDCCH transmission signal by applying phase rotation / cyclic shift (CS) to the reference sequence.

[0146] Sequence-based PDCCH information (DL data) can also be notified via CS. Figure 9 (Figure 10).

[0147] The transmission signal generation process of sequence-based PDCCH can also use a selected phase rotation amount α to make the reference sequence X0-X of sequence length M... M-1Phase rotation (cyclic shift) is performed, and the phase-rotated reference sequence is input to an OFDM (Orthogonal Frequency Division Multiplexing) transmitter or a DFT-S-OFDM (Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing) transmitter. The base station can also transmit the output signal from the OFDM transmitter or the DFT-S-OFDM transmitter.

[0148] Figure 9 This diagram illustrates an example of the association between sequence-based PDCCH information and phase rotation amounts. In a sequence-based PDCCH, multiple phase rotation amount candidates can also be assigned to the reference sequence. For example, in the case of transmitting a 2-bit sequence-based PDCCH, four code resource candidates (e.g., phase rotation amounts) can be assigned. In this example, the sequence-based PDCCH information 0-3 is associated with phase rotation amounts α0, α3, α6, and α9, respectively.

[0149] Figure 10 shows the representation based on Figure 9 Figure 10 illustrates an example of sequence-based PDCCH transmission signal generation processing. In Figure 10, the reference sequence has a length of 12, and in the case where notification information 0 is used as the sequence-based PDCCH, as shown... Figure 10A As shown, the base station uses a phase rotation amount α0 associated with information 0 to adjust the reference sequence X0-X. 11 Perform phase rotation. Similarly, in the case where notification information 1-3 is a sequence-based PDCCH, as follows: Figure 10B , Figure 10C and Figure 10D As shown, the base station uses phase rotations α3, α6, and α9 associated with information 1-3 to pair the reference sequence X0-X. 11 Perform phase rotation.

[0150] Furthermore, in this disclosure, the base station's transmission of a sequence-based PDCCH based on a certain sequence (in other words, the use of a certain sequence in the generation of the sequence-based PDCCH) and the UE's assumption of that sequence to perform reception processing (decoding, etc.) of the sequence-based PDCCH can also be rewritten. Additionally, in this disclosure, the UE's reception / detection of the sequence-based PDCCH and the base station's transmission of the sequence-based PDCCH can also be rewritten.

[0151] As the reference sequence for sequence-based PDCCH, one or more of the following can also be used: pseudo-random sequence, Zadoff-chu (ZC) sequence, computer-generated (CG) sequence, and M-sequence. The pseudo-random sequence can also be as specified in existing 3GPP TS 38.211. The ZC sequence may also be as described in 5.2.1. The sequence is as described in 5.2.2.1. The CG sequence can also be as specified in existing 3GPP TS38.211. The M-sequence can also be a sequence as described in 5.2.2.2. It can also be as described in existing 3GPP TS 38.211. The sequence described in 7.4.2.2.1.

[0152] The reference sequence can also be distinguished based on specific conditions. For example, as a reference sequence for sequence-based PDCCH, the base station may use a first reference sequence (e.g., containing one or more of pseudo-random sequences, ZC sequences, CG sequences, and M sequences) under certain conditions, and otherwise use a second reference sequence (containing one or more of pseudo-random sequences, ZC sequences, CG sequences, and M sequences). The specific conditions can be predetermined or set to the UE via RRC / MAC CE. Furthermore, the aforementioned first and second reference sequences can be different types of sequences (e.g., ZC sequences and M sequences) or the same type of sequences based on different parameters / indices / formulas.

[0153] Specific conditions can also include conditions based on sequence length. For example, if the sequence length is less than X, the base station may use a first reference sequence (e.g., the CG sequence), and if the sequence length is X or more, the base station may use a second reference sequence (e.g., the ZC sequence).

[0154] Specific conditions may also include conditions based on the payload size (transmitted data length) of the DCI. For example, it is also possible that when the payload size of the DCI is less than X, the base station uses a first reference sequence (e.g., the CG sequence), and when the payload size of the DCI is X or more, the base station uses a second reference sequence (e.g., the ZC sequence).

[0155] Specific conditions may also include conditions based on the DCI's SS / aggregation level / CORESET / DCI format / cell ID. For example, it is also possible that when the SS receiving the DCI is a UE-specific search space set (USS), the base station uses a first reference sequence (e.g., CG sequence), and when the SS receiving the DCI is a common search space set (CSS), the base station uses a second reference sequence (e.g., ZC sequence).

[0156] Specific conditions may also include conditions based on the aggregation level of DCI. For example, it is also possible that when the aggregation level of DCI is a first value (e.g., 1), the base station uses a first reference sequence (e.g., CG sequence), and when the aggregation level of DCI is a second value (e.g., 8), the base station uses a second reference sequence (e.g., ZC sequence).

[0157] Specific conditions may also include conditions based on the CORESET of the received DCI. For example, if the CORESET of the received DCI is a first CORESET, the base station may use a first reference sequence (e.g., a CG sequence), and if the CORESET of the received DCI is a second CORESET, the base station may use a second reference sequence (e.g., a ZC sequence).

[0158] Specific conditions may also include conditions based on the DCI format. For example, it is possible that when the DCI is a first DCI format, the base station uses a first reference sequence (e.g., the CG sequence), and when the DCI is a second DCI format, the base station uses a second reference sequence (e.g., the ZC sequence).

[0159] Specific conditions may also include conditions based on the RNTI scrambled with the CRC of the DCI. For example, it is also possible that when the RNTI scrambled with the CRC of the DCI is a first RNTI (e.g., System Information RNTI (SI-RNTI)), the base station uses a first reference sequence (e.g., the M sequence), and when the RNTI scrambled with the CRC of the DCI is a second RNTI (e.g., Cell RNTI (C-RNTI)), the base station uses a second reference sequence (e.g., the CG sequence).

[0160] Specific conditions may also include cell ID-based conditions. For example, when transmitting DCI through a first cell, the base station may use a first reference sequence (e.g., the CG sequence), and when transmitting DCI through a second cell, the base station may use a second reference sequence (e.g., the ZC sequence).

[0161] Specific conditions may also include combinations of the above conditions. For example, if the SS receiving the DCI is USS and the DCI format is a first DCI format, the base station may use a first reference sequence (e.g., CG sequence); if the SS receiving the DCI is CSS, or if the DCI format is a second DCI format, the base station may use a second reference sequence (e.g., ZC sequence).

[0162] Additionally, "less than X" can be rewritten as "below X". Furthermore, "above X" can be rewritten as "exceeds X".

[0163] <Association based on sequence-based deep learning data>

[0164] In sequence-based deep learning data, the relationship between parameters and sequences can also be specified.

[0165] The reference sequence can be different depending on the DCI / RNTI / SS / CORESET, or multiple reference sequences can be used.

[0166] The reference sequences associated with DCI / RNTI / SS / CORESET can be specified through the standard or notified through RRC / MAC CE. Furthermore, the index of the reference sequence can be changed / determined based on the type of RNTI / SS / DCI.

[0167] For example, it is also possible to set the index of the first reference sequence used in PDCCH transmission to 0 when RNTI=0x8000, and to set the index of the first reference sequence to 1 when RNTI=0x8001. Alternatively, it is also possible to set the index of the second reference sequence (a sequence different from the first reference sequence) used in PDCCH transmission to 0 when RNTI=0x9000, and to set the index of the second reference sequence to 1 when RNTI=0x9001.

[0168] The reference sequence associated with DCI / RNTI / SS can also be set to allow multiple receptions as a prerequisite.

[0169] For example, the UE may receive a sequence-based PDCCH for the first time, corresponding to a reference sequence indicating an ACK / NACK sent for the UL, and the UE may receive a sequence-based PDCCH for the second time, corresponding to a reference sequence indicating information specifying resources for the initial transmission / retransmission.

[0170] Alternatively, TDM / FDM / Space Division Multiplexing (SDM) / Code Division Multiplexing (CDM) can be used to multiplex multiple sequence-based PDCCHs of the same type as the reference sequence.

[0171] At least one of the following can be pre-specified according to (per each) DCI / RNTI / SS / CORESET / aggregation level, and the parameters used to determine the associated value can also be notified to the UE using RRC / MAC CE.

[0172] Phase rotation in CS

[0173] Frequency resources

[0174] Time resources

[0175] The number of UEs receiving the same DCI is not limited to one UE; it can be received by multiple UEs. For example, UEs with the same SS / RNTI (UEs that are configured with the same SS / RNTI for DCI reception) can also receive the same DCI (e.g., broadcast information).

[0176] Multiplexing Transmission in Sequence-Based DL Data

[0177] Sequence-based DL data can also be transmitted using TDM / FDM / SDM / CDM at least one of the following:

[0178] • Benchmark sequence

[0179] •CS (phase rotation)

[0180] Frequency resources

[0181] • Time resources.

[0182] Different reference sequences can also be set via RRC / MAC CE, according to each UE / SS / CORESET / DCI format.

[0183] The phase rotation amount of different CS can also be set via RRC / MAC CE, according to each UE / SS / CORESET / DCI format.

[0184] Different time resources can also be set via RRC / MAC CE, according to each UE / SS / CORESET / DCI format.

[0185] Different frequency resources can also be configured via RRC / MAC CE, in each UE / SS / CORESET / DCI format.

[0186] <Supplement>

[0187] [Notification of information to the UE]

[0188] The notification of any information from the Network (NW) (e.g., from the Base Station (BS)) to the UE in the above-described embodiments (in other words, the reception of any information from the BS in the UE) can also be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals) or combinations thereof.

[0189] In the case of notification via MAC CE, the MAC CE can also be identified by including a new Logical Channel ID (LCID) in the MAC subheader that is not specified in the existing standard.

[0190] When the above notification is made via DCI, the notification can also be made through specific fields of the DCI, the Radio Network Temporary Identifier (RNTI) used in the scrambling of the Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0191] Furthermore, the notification of any information to the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0192] [Notification from UE]

[0193] The notification of any information from the UE (to the NW) in the above embodiments (in other words, the transmission / reporting of any information from the UE to the BS) can also be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals), or combinations thereof.

[0194] In the case where the above notification is made via MAC CE, the MAC CE can also be identified by including a new LCID in the MAC subheader that is not specified in the existing standard.

[0195] In cases where the above notification is sent via UCI, the above notification may also be sent using PUCCH or PUSCH.

[0196] Furthermore, the notification of any information from the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0197] [Regarding the application of each implementation method]

[0198] At least one of the above-described implementation methods can also be applied under certain conditions. These specific conditions can be specified in the standard or communicated to the UE / BS using higher-layer signaling / physical layer signaling.

[0199] At least one of the above-described implementation methods may also be applied only to UEs that have reported a specific UE capability or support that specific UE capability.

[0200] This specific UE capability can also represent at least one of the following:

[0201] • Supports specific processing / operation / control / information related to at least one of the above embodiments;

[0202] • Supports sequence-based PDCCH transmission;

[0203] • Supports minimum quality assurance operations.

[0204] Furthermore, the aforementioned specific UE capabilities can be capabilities applied across the entire frequency range (commonly regardless of frequency), capabilities for each frequency (e.g., one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), capabilities for each frequency range (e.g., Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities for each subcarrier spacing (SCS) or capabilities for each feature set (FS) or feature set per component-carrier (FSPC)

[0205] Furthermore, the aforementioned specific UE capabilities can be either capabilities that apply to all duplex modes (commonly regardless of the duplex mode) or capabilities that apply to each duplex mode (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).

[0206] Furthermore, at least one of the above-described embodiments can also be applied when the UE is set / activated / triggered by specific information associated with the above-described embodiments (or the operation of the above-described embodiments is performed) via higher-layer signaling / physical layer signaling. For example, this specific information may be information indicating activation of sequence-based PDCCH transmission, arbitrary RRC parameters for a specific version (e.g., Rel.18 / 19), etc.

[0207] The UE may also apply operations such as Rel.15 / 16 if it does not support at least one of the specific UE capabilities mentioned above or if the specific information mentioned above is not set.

[0208] (Postscript)

[0209] With respect to one embodiment of this disclosure, the following invention is noted.

[0210] [Postscript 1]

[0211] The terminal has:

[0212] The receiving unit receives sequence-based first downlink control information (DCI) without using the demodulation reference signal (DMRS); and

[0213] The control unit controls the reception of the second DCI using DMRS, based on the first DCI.

[0214] [Postscript 2]

[0215] The terminal as described in Appendix 1, wherein,

[0216] The first DCI contains first information, and the second DCI contains second information that was not notified in the first information.

[0217] [Postscript 3]

[0218] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0219] The first DCI contains information related to the resources of the second DCI.

[0220] [Postscript 4]

[0221] The terminal as described in any one of Annexes 1 to 3, wherein,

[0222] The receiving unit obtains the first DCI based on a reference sequence associated with a search space set used for the first DCI.

[0223] (Wireless communication system)

[0224] 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 any one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0225] Figure 11 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one implementation. The wireless communication system 1 (or simply System 1) may also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5GNR) as standardized by the Third Generation Partnership Project (3GPP).

[0226] 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.

[0227] 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.

[0228] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity between NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0229] 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.

[0230] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0231] 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). In addition, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these; for example, FR1 can also correspond to a frequency band higher than FR2.

[0232] 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.

[0233] Multiple base stations 10 can also be connected via wired (e.g., fiber optic, X2 interface, etc. based on 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) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0234] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0235] The core network 30 may also include, for example, user plane functions (UPF), access and mobility management functions (AMF), session management functions (SMF), unified data management (UDM), application functions (AF), data network (DN), location management functions (LMF), and network functions (NF) such as operation, administration and maintenance (OAM). Alternatively, multiple functions can be provided through a single network node. Furthermore, communication with external networks (e.g., the Internet) can also be achieved via the DN.

[0236] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0237] 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.

[0238] 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 in the wireless access methods of UL and DL.

[0239] 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.

[0240] In addition, in the wireless communication system 1, the uplink channel can also be the shared uplink channel (Physical Uplink Shared Channel (PUSCH)), the uplink control channel (Physical Uplink Control Channel (PUCCH)), the random access channel (Physical Random Access Channel (PRACH)) shared by each user terminal 20, etc.

[0241] 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. In addition, Master Information Blocks (MIBs) can also be transmitted via the PBCH.

[0242] Lower-layer control information can also be transmitted via PDCCH. This lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0243] 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 be rewritten as DL data, and PUSCH can be rewritten as UL data.

[0244] In PDCCH detection, a Control Resource Set (CORESET) and a search space can also 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.

[0245] A search space can also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" etc. disclosed herein can be rewritten interchangeably.

[0246] 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 Knowledge (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). The PRACH can also transmit random access preambles used for establishing connections with the cell.

[0247] Additionally, in this disclosure, downlink, uplink, etc., may be described without the word "link". Furthermore, it may be stated that the word "physical" is not included at the beginning of various channels.

[0248] 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.

[0249] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a 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. In addition, SS, SSB, etc. can also be called reference signals.

[0250] Furthermore, in wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, DMRS can also be referred to as user terminal-specific reference signals (UE-specific reference signals).

[0251] (Base station)

[0252] Figure 12 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 path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0253] 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.

[0254] 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.

[0255] 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 wireless resources.

[0256] 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.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0262] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output the baseband signal.

[0263] 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.

[0264] 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 through the transmitting and receiving antenna 130 into the baseband signal.

[0265] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and 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, to acquire user data, etc.

[0266] 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.

[0267] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the device included in the core network 30 (e.g., the network node providing the NF), other base stations 10, etc., and can also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0268] 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 a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0269] Alternatively, the transmitting / receiving unit 120 can also transmit sequence-based first downlink control information (DCI) without using the demodulation reference signal (DMRS). Furthermore, the sequence-based first downlink control information (DCI) without using the demodulation reference signal (DMRS) can also be rewritten as a sequence-based DCI.

[0270] The control unit 110 can also control the transmission of a second DCI using DMRS based on the first DCI. The second DCI using DMRS can also be rewritten as a DMRS-based DCI.

[0271] (User terminal)

[0272] Figure 13This 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.

[0273] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0274] 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.

[0275] 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.

[0276] 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 a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0282] 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.

[0283] Furthermore, whether or not to apply DFT processing can be based on the settings of transform precoding. For a certain channel (e.g., PUSCH), if transform precoding is enabled, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above in order to transmit the channel using the DFT-s-OFDM waveform. If not, the transmit / receive unit 220 (transmit processing unit 2211) can perform the above transmission processing without performing DFT processing.

[0284] 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.

[0285] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, demodulate, etc., the signals of the wireless frequency band received by the transmitting and receiving antenna 230.

[0286] 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.

[0287] 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.

[0288] Additionally, the measurement unit 223 can also derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources can be, for example, non-zero power (NZP) CSI-RS resources. Furthermore, the measurement unit 223 can also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources can be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. Additionally, CSI-IM can also be referred to as CSI-Interference Management (IM), and can be interchanged with zero power (ZP) CSI-RS. Furthermore, in this disclosure, CSI-RS, NZP CSI-RS, and ZP... CSI-RS, CSI-IM, CSI-SSB, etc., can also be interchanged.

[0289] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0290] Additionally, the transmitting / receiving unit 220 can also receive sequence-based first downlink control information (DCI) without using the demodulation reference signal (DMRS). Furthermore, the sequence-based first downlink control information (DCI) without using the demodulation reference signal (DMRS) can also be rewritten as a sequence-based DCI.

[0291] The control unit 210 can also control the reception of a second DCI using DMRS based on the first DCI. The second DCI using DMRS can also be rewritten as a DMRS-based DCI.

[0292] Alternatively, the first DCI may contain first information, and the second DCI may contain second information that was not notified in the first information. The first information may also be information notified via a DMRS-based DCI. Figure 1At least a part of the information of M bits notified by DCI1), that is, x (x < M) bits of information. In this case, the second information may also be the information notified by DCI based on DMRS ( Figure 1 Among the information of M bits notified by DCI1), the M - x bits of information not notified in the first information. In addition, the first information may also be the information for determining the second DCI (DCI based on DMRS).

[0293] The first DCI may also include information related to the resources of the second DCI. This information may also be at least a part of the resource information in any DCI format / search space set (SS) / CORESET / PDCCH of the existing specification (based on DMRS) (for example, aggregation level / DCI format / control channel element (CCE) index, etc.).

[0294] The transmission and reception unit 220 may also obtain the first DCI based on a reference sequence associated with the search space set for the first DCI. The search space set may also be CSS, USS. The reference sequence may also include one or more of a pseudo - random sequence, a ZC sequence, a CG sequence, and an M sequence.

[0295] The resources of the second DCI may also be associated with at least one of the frequency resources and time resources of the first DCI.

[0296] (Hardware structure)

[0297] In addition, the block diagrams used in the description of the above - mentioned embodiments show blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block may be implemented by a single device physically or logically combined, or may be implemented by two or more physically or logically separated devices directly or indirectly (for example, by wire, wireless, etc.) connected with these multiple devices. The functional block may also be implemented by combining the above - mentioned single device or the above - mentioned multiple devices with software.

[0298] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. Each of these, as described above, is not particularly limited in its implementation method.

[0299] For example, in one embodiment of this disclosure, the base station, user terminal, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 14 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, and a bus 1007.

[0300] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit can be interchanged. 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 any of the apparatuses.

[0301] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0302] Regarding the functions in base station 10 and user terminal 20, for example, by reading specific software (programs) into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls communication via communication device 1004, or by controlling at least one of reading and writing data in memory 1002 and storage device 1003.

[0303] The processor 1001 enables the operating system to operate and control the computer as a whole. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a portion of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0304] 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 that causes the computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001; similar implementations can be made for other functional blocks.

[0305] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or 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.

[0306] Storage device 1003 may also be a computer-readable recording medium, such as a flexible disc, floppy disk, optical disk (e.g., a compact disc ROM), digital multifunction disk, Blu-ray disc, removable disk, hard disk drive, smart card, flash memory device (e.g., a card, stick, key drive), magnetic stripe, database, server, or at least one other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0307] 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. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmit / receive unit 120 (220) and transmit / receive antenna 130 (230) may also be implemented by the communication device 1004. The transmit / receive unit 120 (220) may also be implemented by physically or logically separating the transmit unit 120a (220a) and the receive unit 120b (220b).

[0308] Input device 1005 is an input device that receives 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., a touch panel).

[0309] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses between the devices.

[0310] 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 also 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.

[0311] (Variation example)

[0312] Furthermore, the terms described in this disclosure, as well as 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 interchanged. Additionally, a signal may also be a message. A reference signal can 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.

[0313] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitute a radio frame can also be called a subframe. Furthermore, a subframe can also be composed 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).

[0314] Here, the parameter set can also be communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set 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.

[0315] In the time domain, 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 addition, a time slot can also be a time unit based on a set of parameters.

[0316] 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. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0317] 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 can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols in this disclosure can be interchanged.

[0318] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and 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. In addition, the unit representing TTI may not be called a subframe, but rather a time slot, mini-time slot, etc.

[0319] 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 (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0320] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also 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 the TTI.

[0321] Additionally, where a time slot or a 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. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0322] A TTI with a duration of 1 ms can also be referred to as 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 referred to as 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.

[0323] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can also be rewritten as a TTI with a duration of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be rewritten as a TTI with a duration of less than a long TTI but more than 1 ms.

[0324] A resource block (RB) is a unit of resource allocation in both 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 regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0325] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0326] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0327] In addition, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0328] The Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0329] A BWP can also include a UL BWP (the BWP used by UL) and a DL BWP (the BWP used by DL). For a UE, one or more BWPs can also be set within a single carrier.

[0330] 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 may be replaced with "BWP".

[0331] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or 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, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0332] Furthermore, the information, parameters, etc., described in this disclosure can be represented by 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.

[0333] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, 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 various channels and information elements are not limiting names in any respect.

[0334] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0335] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0336] Input and output information, signals, etc., can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc., can be overwritten, updated, or appended. Output information, signals, etc., can also be deleted. Input information, signals, etc., can also be sent to other devices.

[0337] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented by 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.

[0338] 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).

[0339] Furthermore, notification of specific information (e.g., a notification of “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).

[0340] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0341] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted to refer to instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0342] 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, fiber optic cable, 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.

[0343] The terms “system” and “network” as used in this disclosure are interchangeable. “Network” may also mean devices included in a network (e.g., base stations).

[0344] 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”, “layer”, “number of layers”, “rank”, “resource”, “resource set”, “beam”, “beamwidth”, “beam angle”, “antenna”, “antenna element”, “panel”, “UE panel”, “transmitting entity”, and “receiving entity” are used interchangeably.

[0345] Furthermore, in this disclosure, the antenna port can also be rewritten with an antenna port used for any signal / channel (e.g., a DeModulation Reference Signal (DMRS) port). In this disclosure, resources can also be rewritten with resources used for any signal / channel (e.g., reference signal resources, SRS resources, etc.). Additionally, resources can also include time / frequency / code / space / power resources. Moreover, the spatial domain transmission filter can also include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0346] The aforementioned groups may include, for example, at least one of the following: spatial relation group, code division multiplexing (CDM) group, reference signal (RS) group, control resource set (CORESET) group, PUCCH group, antenna port group (e.g., DMRS port group), layer group, resource group, beam group, antenna group, panel group, etc.

[0347] Furthermore, in this disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), RS, etc., can also be rewritten to each other.

[0348] Furthermore, in this disclosure, the TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, and joint TCI state can also be rewritten to each other.

[0349] Furthermore, in this disclosure, terms such as "QCL", "QCL concept", "QCL relationship", "QCL type information", "QCL property (QCLproperty / properties)", "specific QCL type (e.g., type A, type D) property", and "specific QCL type (e.g., type A, type D)" can be rewritten interchangeably.

[0350] In this disclosure, indexes, identifiers (IDs), indicators, indications, resource IDs, etc., can be interchanged. Sequences, lists, sets, groups, clusters, subsets, etc., can also be interchanged.

[0351] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) can be interchanged. "Spatial relationship information (TCI state)" can also be interchanged with "a set of spatial relationship information (TCI states)," "one or more spatial relationship information," etc. TCI state and TCI can also be interchanged. Spatial relationship information and spatial relationships can also be interchanged.

[0352] 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. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0353] 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 provide communication services through 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 ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0354] In this disclosure, the fact that the base station sends information to the terminal can also be modified to mean that the base station instructs the terminal to perform control / operation based on that information.

[0355] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0356] There are also instances where mobile stations are 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 several other appropriate terms.

[0357] 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. Additionally, at least one of the base station and the mobile station can also be a device mounted on a moving object, the moving object itself, etc.

[0358] The term "mobile body" refers to a movable object whose speed is arbitrary, including situations where the body is stationary. Examples of such mobile bodies include vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, hot air balloons, and objects carried on them, but are not limited to these. Furthermore, the mobile body can also be a mobile body that moves autonomously based on operational commands.

[0359] The mobile entity can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile entity 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 also includes a device that does 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.

[0360] Figure 15This is a diagram illustrating an example of a vehicle according to one embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, a speed sensor 51, a pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0361] The drive unit 41 is comprised of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is configured to include at least a steering wheel (also called a steering handle) that steers at least one of the front wheels 46 and the rear wheels 47 based on operation of the steering wheel by the user.

[0362] The electronic control unit 49 consists of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63). Signals from various sensors 50-58 present in the vehicle are input to the electronic control unit 49. The electronic control unit 49 can also be referred to as an electronic control unit (ECU).

[0363] The signals from various sensors 50-58 include the following: current signal from current sensor 50 sensing the current of the motor; rotational speed signal of front wheel 46 / rear wheel 47 obtained by speed sensor 51; air pressure signal of front wheel 46 / rear wheel 47 obtained by air pressure sensor 52; vehicle speed signal obtained by vehicle speed sensor 53; acceleration signal obtained by acceleration sensor 54; accelerator pedal 43 depress amount signal obtained by accelerator pedal sensor 55; brake pedal 44 depress amount signal obtained by brake pedal sensor 56; shift lever 45 operation signal obtained by shift lever sensor 57; and detection signal obtained by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[0364] The information service unit 59 consists of various devices such as a navigation system, audio system, speakers, display, television, and radio, used to provide (output) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 59 uses information obtained from external devices via the communication module 60, etc., to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0365] The information service unit 59 may include input devices (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) that accept input from the outside, and output devices (e.g., display, speaker, LED light, touch panel, etc.) that implement output to the outside.

[0366] The driver assistance system unit 64 comprises various devices used to provide functions for preventing accidents or reducing the driver's workload, such as millimeter-wave radar, light detection and ranging (LiDAR), cameras, positioning detectors (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyroscope systems (e.g., Inertial Measurement Unit (IMU)) and Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, and one or more ECUs that control these devices. Furthermore, the driver assistance system unit 64 sends and receives various information via the communication module 60 to realize driver assistance functions or autonomous driving functions.

[0367] The communication module 60 can communicate with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) with the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49 of the vehicle 40, and various sensors 50-58 via the communication port 63.

[0368] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49 and is a communication device capable of communicating with external devices. For example, it can transmit and receive various types of information with external devices via wireless communication. The communication module 60 can be located both inside and outside the electronic control unit 49. The external device can be, for example, the aforementioned base station 10, user terminal 20, etc. Furthermore, the communication module 60 can be, for example, at least one of the aforementioned base station 10 and user terminal 20 (or it can function as at least one of the base station 10 and user terminal 20).

[0369] The communication module 60 can also wirelessly transmit at least one of the signals input to the electronic control unit 49 from the various sensors 50-58 described above, the information obtained based on these signals, and the information based on input from an external (user) source obtained via the information service unit 59 to an external device. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., can also be referred to as input units that receive input. For example, the PUSCH transmitted via the communication module 60 can also contain information based on the aforementioned inputs.

[0370] The communication module 60 receives various information (traffic information, signal information, workshop information, etc.) sent from external devices and displays it on the vehicle's information service unit 59. The information service unit 59 can also be referred to as an output unit that outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH received by the communication module 60 (or the data / information decoded from the PDSCH).

[0371] Furthermore, the communication module 60 stores various types of information received from external devices into a memory 62 that can be utilized by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, and various sensors 50-58, etc., of the vehicle 40.

[0372] Furthermore, the base station in this disclosure can also be rewritten as a user terminal. For example, various methods / implementations of this disclosure can be applied to structures where communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be rewritten as terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can also be rewritten as sidelink channel.

[0373] Similarly, the user terminal in this disclosure can also be rewritten as a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[0374] In this disclosure, operations are assumed to be performed by the base station, and sometimes, depending on the circumstances, by its upper node. In a network containing one or more network nodes having a base station, the various operations performed 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.

[0375] The various methods / implementations described in this disclosure can be used individually or in combination, and can be switched as needed 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 they do not contradict each other. For example, for the method described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[0376] 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), 6th generation mobile communication system (6G), xth generation mobile communication system (xG, where x is, for example, an integer or a decimal)), 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, a registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), and IEEE This includes 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-Wideband (UWB)), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from, modified, generated, or specified based on these methods. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0377] As used in this disclosure, the term "based on" does not mean "based on only" unless otherwise specified. In other words, the term "based on" means both "based on only" and "based on at least".

[0378] Any reference to an element using the designations "first," "second," etc., as used in this disclosure does not comprehensively limit the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to the first and second elements does not imply that only two elements may be used, or that the first element must take precedence over the second element in some form.

[0379] The term "determining" as used in this disclosure can encompass a wide variety of operations. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (search, inquiry) (e.g., searching in a table, database or other data structure), and ascertaining.

[0380] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[0381] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". That is, "judgment (decision)" can also refer to certain operations as making a "judgment (decision)". In this disclosure, "judgment (decision)" can also be rewritten in relation to the operations described above.

[0382] Furthermore, in this disclosure, "determine / determining" can also be interchanged with "assume / assuming," "expect / expecting," "consider / considering," etc. Additionally, in this disclosure, "not assuming to proceed..." can also be interchanged with "assuming not to proceed..."

[0383] In this disclosure, "expect" can also be interchanged with "be expected." For example, "expect(s) ..." (where "..." can also be expressed using a that clause, to infinitive, etc.) can also be interchanged with "be expected ...." "Does not expect..." can also be interchanged with "be not expected...". Furthermore, "An apparatus A is not expected..." can also be interchanged with "Apparatus B other than apparatus A does not expect..." (for example, if apparatus A is a UE, apparatus B can also be a base station).

[0384] The term "maximum transmit power" as used in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0385] As used in this disclosure, the terms “connected,” “coupled,” or all variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually “connected” or “coupled” elements. The connections or combinations between elements can be physical, logical, or a combination thereof. For example, “connection” can also be rewritten as “access.”

[0386] In this disclosure, when two elements are connected, 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 several non-limiting and non-exclusive examples, to use electromagnetic energy with wavelengths having wireless frequency domain, microwave region, light (both visible and invisible) region to be "connected" or "combined" with each other.

[0387] 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."

[0388] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," mean inclusive. Furthermore, the term "or" as used in this disclosure does not mean XOR.

[0389] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0390] In this disclosure, terms such as "below," "less than," "above," "more than," and "equal to" can be interchanged. Furthermore, in this disclosure, terms meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow" are not limited to the positive, comparative, and superlative degrees and can be interchanged. Additionally, in this disclosure, terms meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow" as expressions containing "i" (where i is any integer) can also be interchanged, not limited to the positive, comparative, and superlative degrees (for example, "highest" can also be interchanged with "i-th highest").

[0391] In this disclosure, "of", "for", "regarding", "related to", "associated with" can also be rewritten interchangeably.

[0392] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "B in response to A", "B based on A", "B during / while A", "B before A", "B at (the same time as) / on A", "B after A", "B since A", and "B until A" can be rewritten interchangeably. Furthermore, A and B can be replaced with nouns, gerunds, or ordinary sentences, depending on the context. Additionally, the time difference between A and B can be approximately 0 (immediately after or immediately before). Moreover, a time offset can be applied to the time A occurs. For example, "A" can be rewritten interchangeably with "before / after the time offset of A". This time offset (e.g., more than one symbol / slot) can be predetermined or determined by the UE based on the information it is notified of.

[0393] In this disclosure, timing, moment, time, time instance, arbitrary time unit (e.g., time slot, sub-time slot, symbol, subframe), period, opportunity, resource, etc., can also be overridden.

[0394] The inventions disclosed herein have been described in detail above. However, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The description herein is for illustrative purposes only and is not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal, comprising: The receiving unit receives first downlink control information (i.e., first DCI) based on a sequence without using the demodulation reference signal (DMRS); and The control unit controls the reception of the second DCI using DMRS, based on the first DCI.

2. The terminal as described in claim 1, wherein, The first DCI contains first information, and the second DCI contains second information that was not notified in the first information.

3. The terminal as described in claim 1, wherein, The first DCI contains information related to the resources of the second DCI.

4. The terminal as described in claim 1, wherein, The receiving unit obtains the first DCI based on a reference sequence associated with a search space set used for the first DCI.

5. A wireless communication method for a terminal, comprising: The steps of receiving sequence-based first downlink control information, i.e., the first DCI, without using the demodulation reference signal (DMRS); and Based on the first DCI, the steps of controlling the reception of the second DCI using DMRS.

6. A base station, comprising: The transmitting unit transmits first downlink control information (i.e., first DCI) based on a sequence without using the demodulation reference signal (DMRS); and The control unit controls the transmission of a second DCI using DMRS, based on the first DCI.

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