Terminal

Abstract

The UE (200) receives downlink control information from the network and uses the downlink control information to schedule multiple component carriers. The UE (200) applies the information indicated by the transmission setting shown by the downlink control information to the multiple component carriers.

Description

Technical Field

[0001] The present disclosure relates to a terminal that performs wireless communication, and more particularly to a terminal that performs wireless communication using multiple component carriers. Background Art

[0002] The 3rd Generation Partnership Project (3GPP) has standardized the 5th generation mobile communication system (also known as 5G, New Radio (NR), or Next Generation (NG)). In addition, the standardization of the next generation, such as Beyond 5G, 5G Evolution, or 6G, has also been promoted.

[0003] In Releases 15 and 16 (NR) of 3GPP, the operation in multiple frequency ranges, specifically, the bands including FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz), has been standardized.

[0004] In addition, research on supporting NR up to 71 GHz beyond 52.6 GHz has also been promoted (Non-Patent Document 1). In addition, Beyond 5G, 5G Evolution, or 6G (after Release-18) aims to support frequency bands beyond 71 GHz.

[0005] Prior Art Documents

[0006] Non-Patent Documents

[0007] Non-Patent Document 1: "New WID on Extending current NR operation to 71GHz", RP-193229, 3GPP TSG RAN Meeting #86, 3GPP, December 2019 Summary of the Invention

[0008] As described above, it is envisioned that if the available frequency band is extended, the possibility of setting more component carriers (CCs) becomes higher.

[0009] In carrier aggregation (CA), the number of CCs that can be set is specified. For example, in Releases 15 and 16 of 3GPP, the maximum number of CCs that can be set for a terminal (User Equipment, UE) is 16 in the downlink (DL) and uplink (UL), respectively.

[0010] On the other hand, the settings of the physical layer and the medium access control layer (MAC) are performed for each CC. For example, a downlink control information (DCI) can only schedule one CC, so in order to schedule multiple CCs, multiple DCIs are required.

[0011] In particular, in the case of cross-carrier scheduling that applies scheduling across multiple CCs, the capacity of the physical downlink control channel (PDCCH) for transmitting DCI may be tight.

[0012] Therefore, the purpose of the following disclosure is to provide a terminal that can achieve efficient scheduling of CCs using downlink control information (DCI) even when multiple component carriers (CCs) are set.

[0013] One aspect of the present disclosure provides a terminal (UE 200) having: a receiving unit (control signal / reference signal processing unit 240) that receives downlink control information from a network; and a control unit (control unit 270) that schedules multiple component carriers using the downlink control information, and the control unit applies information indicating a transmission setting shown by the downlink control information to the multiple component carriers.

[0014] One aspect of the present disclosure provides a terminal, wherein the terminal has: a receiving unit that receives downlink control information from a network; and a control unit that, based on a high-layer setting, applies a state indicating a transmission setting shown by the downlink control information to multiple component carriers with a bandwidth part (BWP) as a reference, and the control unit does not assume that the state indicating the transmission setting is set for multiple component carriers within a frequency band.

[0015] One aspect of the present disclosure provides a wireless communication method in a terminal, wherein the wireless communication method includes the following steps: receiving downlink control information from a network; and based on a high-layer setting, applying a state indicating a transmission setting shown by the downlink control information to multiple component carriers with a bandwidth part (BWP) as a reference, and in the applying step, it is not assumed that the state indicating the transmission setting is set for multiple component carriers within a frequency band.

[0016] One aspect of the present disclosure provides a communication system including a base station and a terminal. The base station has a transmission unit that transmits downlink control information indicating a transmission setting instruction. The terminal has a reception unit that receives the downlink control information, and a control unit that, based on a higher-layer setting, applies, with respect to a plurality of component carriers, a state of the transmission setting instruction indicated by the downlink control information with a bandwidth part (BWP) as a reference. The control unit does not assume that the state of the transmission setting instruction is set for a plurality of component carriers within a frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an overall schematic configuration diagram of the wireless communication system 10.

[0018] Figure 2 is a diagram showing the frequency range used in the wireless communication system 10.

[0019] Figure 3 is a diagram showing a structural example of a radio frame, a subframe, and a time slot used in the wireless communication system 10.

[0020] Figure 4 is a functional block configuration diagram of the UE 200.

[0021] Figure 5 is a diagram showing an example of a communication timing related to TCI switching of a plurality of CCs using a single DCI.

[0022] Figure 6 is a diagram showing a structural example of a control channel and a data channel.

[0023] Figure 7 is a diagram showing a schematic structure of a DCI.

[0024] Figure 8 is a diagram for explaining a CC group.

[0025] Figure 9 is a diagram for explaining a CC group.

[0026] Figure 10 is a diagram showing an example of the hardware structure of the UE 200. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Hereinafter, embodiments will be described based on the drawings. In addition, the same or similar reference numerals are given to the same functions and structures, and their descriptions are appropriately omitted.

[0028] (1) Overall Schematic Structure of the Wireless Communication System

[0029] Figure 1It is an overall schematic structural diagram of the wireless communication system 10 involved in this embodiment. The wireless communication system 10 is a wireless communication system based on the 5G New Radio (NR), including a Next Generation-Radio Access Network 20 (hereinafter referred to as NG-RAN 20), and a terminal 200 (hereinafter referred to as UE200).

[0030] In addition, the wireless communication system 10 may also be a wireless communication system based on a mode known as Beyond 5G, 5G Evolution, or 6G.

[0031] NG-RAN 20 includes a radio base station 100A (hereinafter referred to as gNB 100A) and a radio base station 100B (hereinafter referred to as gNB100B). In addition, the specific structure of the wireless communication system 10 including the number of gNBs and UEs is not limited to Figure 1 the example shown.

[0032] NG-RAN 20 actually includes multiple NG-RAN Nodes (NG-RAN nodes), specifically, includes gNBs (or ng-eNBs), and is connected to a 5G-based core network (5GC, not shown). In addition, NG-RAN20 and 5GC can be simply expressed as "network".

[0033] gNB 100A and gNB 100B are 5G-based radio base stations, and perform 5G-based wireless communication with UE 200. gNB100A, gNB 100B, and UE 200 can support Massive MIMO (Multiple-Input Multiple-Output) that generates a beam BM with higher directivity by controlling wireless signals transmitted from multiple antenna elements, carrier aggregation (CA) that bundles multiple component carriers (CCs), and dual connectivity (DC) that enables simultaneous communication between the UE and two NG-RAN Nodes, etc.

[0034] In addition, the wireless communication system 10 supports multiple frequency ranges (FRs). Figure 2 Shows the frequency ranges used in the wireless communication system 10.

[0035] As Figure 2 shown, the wireless communication system 10 supports FR1 and FR2. The frequency bands of each FR are as follows.

[0036] ·FR1: 410 MHz to 7.125 GHz

[0037] ·FR2: 24.25 GHz to 52.6 GHz

[0038] In FR1, a sub-carrier spacing (SCS) of 15, 30, or 60 kHz is used, and a bandwidth (BW) of 5 to 100 MHz is used. FR2 can have a higher frequency than FR1, use an SCS of 60 or 120 kHz (240 kHz may be included), and use a bandwidth (BW) of 50 to 400 MHz.

[0039] In addition, the SCS can be interpreted as a numerology. The numerology is defined in 3GPP TS38.300 and corresponds to a sub-carrier spacing in the frequency domain.

[0040] In addition, the wireless communication system 10 also supports a frequency band higher than the FR2 band. Specifically, the wireless communication system 10 supports a frequency band from over 52.6 GHz to 71 GHz. Here, for ease of explanation, this high-frequency band is referred to as "FR2x".

[0041] To solve this problem, in the case of using a band over 52.6 GHz, cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) / discrete Fourier transform-spread (DFT-S-OFDM) with a larger sub-carrier spacing (SCS) can be applied.

[0042] Figure 3 Shows a structural example of a radio frame, sub-frame, and time slot used in the wireless communication system 10.

[0043] As Figure 3 shown, 1 time slot consists of 14 symbols. The larger (wider) the SCS, the shorter the symbol period (and time slot period). The SCS is not limited to Figure 3 the intervals (frequencies) shown. For example, 480 kHz, 960 kHz, etc. can be used.

[0044] In addition, the number of symbols constituting 1 time slot may not necessarily be 14 symbols (e.g., 28, 56 symbols). Also, the number of time slots per sub-frame can vary according to the SCS.

[0045] In addition, Figure 3The shown time direction (t) can be referred to as a time domain, a symbol period, a symbol time, etc. In addition, the frequency direction can also be referred to as a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP: Bandwidth part), etc.

[0046] A BWP can also be interpreted as a continuous set of PRBs (Physical Resource Blocks) selected from a continuous subset of a common resource block for a given numerology on a given carrier.

[0047] Regarding the BWP information (bandwidth, frequency position, subcarrier spacing (SCS)) that the UE 200 should use in wireless communication, it can be set for the UE 200 using high-layer (e.g., signaling of the radio resource control layer (RRC)). Different BWPs can be set for each UE 200 (terminal). The BWP can be changed by high-layer signaling or low-layer (specifically, physical layer (L1) signaling (such as DCI described later)).

[0048] In the wireless communication system 10, to achieve higher throughput, multiple CCs for CA can be supported. For example, when the maximum bandwidth of a CC is 400 MHz, up to 32 CCs can be configured within FR2x (specifically, the frequency band of 57 GHz to 71 GHz). Additionally, the maximum number of configured CCs can exceed 32 or be a number less than or equal to 32.

[0049] In addition, in the wireless communication system 10, the switching of the transmission configuration indication (TCI) state for multiple CCs can be supported via one downlink control information (DCI). That is, in the wireless communication system 10, multiple CCs can be scheduled using a single DCI. In addition, the details of the TCI switching using a single DCI will be described later.

[0050] The TCI can be specified by high-layer parameters (e.g., the field of tci-PresentInDCI). tci-PresentInDCI can indicate whether there is a TCI field in the DCI associated with DL. When there is no TCI field, the UE200 can consider that there is no TCI or the TCI is invalid.

[0051] In the case of cross-carrier scheduling, the network can effectively set the TCI field for the CORESET (control resource sets) used in cross-carrier scheduling within the scheduled cell. The TCI provides, for example, information related to the quasi co-location (QCL) of the antenna port used for the PDCCH (Physical Downlink Control Channel).

[0052] QCL can be interpreted, for example, as assuming that two antenna ports are virtually located at the same position when the characteristics of the channel over which a symbol is transmitted on one antenna port can be estimated based on the channel over which a symbol is transmitted on another antenna port.

[0053] In addition, the DCI can contain the following information.

[0054] (i) Resource allocation for the uplink (UL) (permanent or non-permanent)

[0055] (ii) Description of the downlink (DL) data sent to the UE 200

[0056] The DCI can also be interpreted as a set of information that can schedule a downlink data channel (e.g., PDSCH (Physical Downlink Shared Channel)) or an uplink data channel (e.g., PUSCH (Physical Uplink Shared Channel)). Such DCI can be specifically referred to as scheduling DCI.

[0057] (2) Functional block structure of the wireless communication system

[0058] Next, the functional block structure of the wireless communication system 10 will be described. Specifically, the functional block structure of the UE 200 will be described.

[0059] Figure 4 is a functional block structure diagram of the UE 200. As Figure 4 shown, the UE 200 has a radio signal transceiver unit 210, an amplifier unit 220, a modulation / demodulation unit 230, a control signal / reference signal processing unit 240, an encoding / decoding unit 250, a data transceiver unit 260, and a control unit 270.

[0060] The radio signal transceiver unit 210 transceives radio signals based on NR. The radio signal transceiver unit 210 supports Massive MIMO, CA using multiple CCs bundled, and DC for simultaneous communication between the UE and two NG-RAN Nodes, respectively.

[0061] The amplifier unit 220 is composed of a PA (Power Amplifier) / LNA (Low Noise Amplifier), etc. The amplifier unit 220 amplifies the signal output from the modulation and demodulation unit 230 to a predetermined power level. In addition, the amplifier unit 220 amplifies the RF signal output from the wireless signal transceiver unit 210.

[0062] The modulation and demodulation unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB 100A or other gNBs). In the modulation and demodulation unit 230, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-S-OFDM) can be applied. In addition, DFT-S-OFDM can be applied not only to the uplink (UL) but also to the downlink (DL).

[0063] The control signal / reference signal processing unit 240 performs processing related to various control signals transmitted and received by the UE 200, and processing related to various reference signals transmitted and received by the UE 200.

[0064] Specifically, the control signal / reference signal processing unit 240 receives various control signals transmitted from the gNB 100A via a predetermined control channel, for example, control signals of the radio resource control layer (RRC). In addition, the control signal / reference signal processing unit 240 transmits various control signals toward the gNB 100A via a predetermined control channel.

[0065] The control signal / reference signal processing unit 240 performs processing using reference signals (RS) such as a demodulation reference signal (DMRS: Demodulation reference signal) and a phase tracking reference signal (PTRS: Phase Tracking Reference Signal).

[0066] The DMRS is a terminal-specific reference signal (pilot signal) known between the base station and the terminal for estimating the fading channel used in data demodulation. The PTRS is a terminal-specific reference signal for the purpose of estimating phase noise, which poses a problem in high frequency bands.

[0067] In addition, in addition to DMRS and PTRS, reference signals further include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS) for location information, etc.

[0068] In addition, a channel includes a control channel and a data channel. The control channel includes a Physical Downlink Control Channel (PDCCH), a Physical Uplink Control Channel (PUCCH), a Random Access Channel (RACH) (including a Random Access Radio Network Temporary Identifier (RA-RNT) and Downlink Control Information (DCI)), and a Physical Broadcast Channel (PBCH), etc.

[0069] In addition, the data channel includes a Physical Downlink Shared Channel (PDSCH) and a Physical Uplink Shared Channel (PUSCH), etc. Data refers to data transmitted via the data channel. The data channel may be replaced by a shared channel.

[0070] In this embodiment, the control signal and reference signal processing unit 240 receives Downlink Control Information (DCI) from the network. In this embodiment, the control signal and reference signal processing unit 240 constitutes a receiving unit.

[0071] Specifically, the control signal and reference signal processing unit 240 can receive multiple types (formats) of DCI including scheduled DCI. The format of the DCI may include scheduling of PUSCH and PDSCH, time slot format, and Transmit Power Control (TPC) commands for PUCCH and PUSCH, etc. More specifically, the DCI format specified in Section 7.3.1 of 3GPP TS38.212 may be targeted.

[0072] The encoding / decoding unit 250 performs data segmentation / concatenation, channel encoding / decoding, etc. for each predetermined communication destination (gNB 100A or other gNBs).

[0073] Specifically, the encoding / decoding unit 250 segments the data output from the data transceiver unit 260 into a predetermined size, and performs channel encoding on the segmented data. In addition, the encoding / decoding unit 250 decodes the data output from the modulation / demodulation unit 230, and concatenates the decoded data.

[0074] The data transceiver unit 260 performs the transmission and reception of protocol data units (PDUs) and service data units (SDUs). Specifically, the data transceiver unit 260 performs the assembly / decomposition of PDUs / SDUs in multiple layers (such as the media access control layer (MAC), the radio link control layer (RLC), and the packet data convergence protocol layer (PDCP)). In addition, the data transceiver unit 260 performs error correction and retransmission control of data according to hybrid automatic repeat request (Hybrid ARQ).

[0075] The control unit 270 controls each functional block constituting the UE 200. In particular, in the present embodiment, the control unit 270 can schedule multiple component carriers (CCs) using DCI.

[0076] As described above, in the wireless communication system 10, the switching of the TCI of multiple CCs can be supported via one downlink control information (DCI). To support such TCI switching, the control unit 270 can schedule multiple CCs using one (single) DCI received via the control signal / reference signal processing unit 240. That is, the control unit 270 can apply the TCI information indicated by the DCI to multiple CCs.

[0077] Specifically, the value of the TCI field included in the single DCI can be commonly applied to multiple CCs transmitted and received by the wireless signal transceiver unit 210. The multiple CCs can be all the CCs transmitted and received by the wireless signal transceiver unit 210, or a part of them can be excluded.

[0078] For example, the TCI field can be composed of 3 bits. The TCI field can also be 0 bits, but in this case, it can be specified by a higher layer parameter (tci-PresentInDCI) whether the TCI field exists in the DCI.

[0079] Alternatively, the control unit 270 may apply the TCI information to a group composed of multiple CCs. Specifically, the control unit 270 may apply the TCI included in one (single) DCI to multiple CCs within the group.

[0080] More specifically, the higher layer may form multiple CCs into a group. Among them, the TCI field of the DCI may be commonly applied to the group regardless of the CCs scheduled by the DCI.

[0081] In addition, the higher layer setting related to the group may be the same as the "applicable-CC-list" (3GPP Release-16) for indicating a single MAC-CE (Control Element) for multiple CCs.

[0082] As described above, multiple CCs may be targeted at all CCs transmitted and received by the wireless signal transceiver unit 210, but the following restrictions may also be added.

[0083] For example, multiple CCs commonly applying a single DCI may be restricted to CCs adjacent (also referred to as continuous) within the same frequency band (band). That is, the multiple CCs as the target may be adjacent in the same frequency band. In addition, as long as they are adjacent (continuous), more than three CCs may also be targeted.

[0084] In addition, the higher layer setting related to the TCI is preferably the same for the same ID among multiple CCs. Alternatively, the UE 200 may not expect a situation where TCI states are set for multiple CCs within the group.

[0085] (3) Operation of the wireless communication system

[0086] Next, the operation of the wireless communication system 10 will be described. Specifically, the operation related to the TCI switching of multiple CCs using a single DCI will be described.

[0087] (3.1) Premise

[0088] In the wireless communication system 10, as described above, it supports frequency bands (FR2x) from over 52.6 GHz to 71 GHz. From the following viewpoints, this high-frequency band FR2x has essential differences from FR1 and FR2.

[0089] (Channel / Radio wave propagation)

[0090] · Expansion of available bandwidth (about 13 GHz (in the case of 57 - 71 GHz unlicensed)

[0091] · Low-latency extension based on large path loss due to non-line-of-sight (NLOS: Non-Line Of Sight)

[0092] (Device (Terminal)

[0093] · Small-sized antenna elements corresponding to the wavelength (Massive antenna based on small-sized antenna elements corresponding to the wavelength)

[0094] · High directivity (narrow beam width) based on analog beamforming

[0095] · Reduction in the efficiency of the power amplifier (increase in the peak-to-average power ratio (PAPR))

[0096] · Increase in phase noise (possibility of applying higher SCS and shorter symbol time)

[0097] In addition, the wider the available bandwidth, the higher the possibility of setting more CCs as long as very wide CC bandwidths are not supported. As described above, in the case of FR2 where the maximum bandwidth of a CC is 400 MHz, up to 32 CCs can be configured maximally in the frequency band of 57 GHz to 71 GHz.

[0098] In carrier aggregation (CA), there are limitations on the number of CCs that can be set. Specifically, in 3GPP Release-15 and 16, the maximum number of CCs that can be set for the UE 200 is 16 in both DL and UL (Section 5.4.1 of 3GPP 38.300).

[0099] On the other hand, the settings of the physical layer (L1, PHY) and the media access control layer (MAC) are performed for each CC. In 3GPP Release-15 and 16, since one DCI can only schedule one CC, multiple DCIs are required to schedule multiple CCs. In particular, in cross-carrier scheduling, the capacity of the PDCCH may be tight.

[0100] In addition, one transport block (TB) can only be transmitted through one CC (i.e., one TB cannot be mapped to multiple CCs), and multiple hybrid automatic repeat request (HARQ) acknowledgement (ACK) bits are required for multiple CCs.

[0101] Furthermore, beam management (TCI state indication) is also performed for each CC. Specifically, in 3GPP Release-16, one MAC-CE can update / activate the TCI states of multiple CCs, but one DCI can only update the TCI state of one CC.

[0102] Despite this limitation, since the channel characteristics of multiple CCs envisioned within a single wideband domain are not so different, the actions in the PHY and MAC layers dedicated to each CC are not necessarily required or efficient.

[0103] Hereinafter, considering this premise, the actions for achieving efficient scheduling of CCs using DCI even when multiple CCs are configured will be described.

[0104] (3.2) Action Summary

[0105] In the wireless communication system 10, to achieve a high throughput, even when supporting multiple CCs for CA, the overhead of the DL control channel is reduced. In particular, in the wireless communication system 10, the tightness of the PDCCH capacity during cross-carrier scheduling can be reliably avoided.

[0106] Specifically, in the wireless communication system 10, the switching of the TCI for multiple CCs is supported via one DCI. Since this TCI switching is supported, one (single) DCI can be used to schedule multiple CCs.

[0107] When one DCI schedules multiple CCs, the TCI field indicated by the DCI can be commonly applied to multiple CCs.

[0108] Alternatively, the higher layer can configure multiple CCs into a group. Among them, the TCI field of the DCI can be commonly applied to the group regardless of the CCs that have already been scheduled by the DCI.

[0109] In this case, as described above, the higher layer setting related to the group can be the same as the "applicable-CC-list" (3GPP Release-16) for indicating a single MAC-CE for multiple CCs.

[0110] In addition, multiple CCs to which a single DCI is commonly applied can be restricted to adjacent (also referred to as consecutive) CCs within the same frequency band (band domain). In this case, for any QCL type (A / B / C / D), one TCI can be commonly applied to multiple CCs.

[0111] The QCL types are defined as follows in Section 5.1.5 of 3GPP TS38.214.

[0112] · QCL-TypeA: {Doppler shift, Doppler spread, average delay, delay spread (Doppler frequency shift, Doppler spread, average delay, delay spread)}

[0113] ·QCL-TypeB: {Doppler shift, Doppler spread}

[0114] ·QCL-TypeC: {Doppler shift, average delay}

[0115] ·QCL-TypeD: {Spatial Rx parameter}

[0116] In addition, for the higher-layer settings related to TCI, it is preferably the same for the same ID among multiple component carriers. Alternatively, UE 200 may not expect the case where there is a TCI state for the multiple CC settings within a group.

[0117] Figure 5 An example of the communication timing related to the TCI switching of multiple CCs using a single DCI according to this embodiment is shown. Here, UE 200 is configured with multiple CCs for performing CA.

[0118] As Figure 5 shown, the network transmits PDCCH (S10) to UE 200. The PDCCH may contain DCI (scheduling DCI).

[0119] UE 200 receives the PDCCH and obtains the TCI included in the DCI. Specifically, UE 200 obtains the value of the TCI field included in the DCI (S20).

[0120] UE 200 applies the obtained value of the TCI field to the multiple configured CCs (S30). Specifically, UE 200 performs the same TCI switching on the multiple CCs according to the value of the TCI field.

[0121] UE 200 performs TCI switching and configures the radio link with the network (gNB 100A or gNB 100B) and performs wireless communication (S40).

[0122] Figure 6 An example of the structure of the control channel and the data channel is shown. As Figure 6 shown, the PDCCH contains DCI. In this embodiment, the DCI may contain scheduling DCI such as PDSCH.

[0123] Figure 7 An overview of the structure of the DCI is shown. As Figure 7As shown, a plurality of fields are provided in the payload PL portion of the DCI 300. The field includes a TCI field 310 that represents the value of the TCI.

[0124] As described above, the TCI field can be composed of 3 bits, but is not necessarily limited to this value, and more bits (i.e., the number of TCI states (QCL)) can also be used.

[0125] (3.3) Operation Example 1

[0126] In this operation example, when a single DCI schedules multiple CCs, the TCI field represented by the DCI is commonly applied to the multiple CCs.

[0127] That is, when a single DCI schedules multiple CCs, there can be a single TCI field.

[0128] For the value of the TCI represented by the DCI, the operation can be performed according to the following operation examples.

[0129] · (Operation Example 1-1): Applied to all CCs set as a group (a part of the CCs may not be scheduled by the DCI).

[0130] · (Operation Example 1-1-1): For the higher-layer setting related to the CC group for TCI switching, it can be the same as the "applicable-CC-list" (3GPP Release-16) for the indication of a single MAC-CE for multiple CCs.

[0131] · (Operation Example 1-1-2): The higher-layer setting related to the CC group for TCI switching is separated from the CC group for other purposes.

[0132] In addition, even when only one CC is scheduled by the DCI, Operation Example 1-1 can be applied.

[0133] · (Operation Example 1-2): Applied to all CCs scheduled by the DCI (i.e., the TCI state of the unscheduled CCs will not be updated).

[0134] Furthermore, the TCI switching of multiple CCs based on a single DCI can be performed according to any of the following operation examples.

[0135] · (Operation Example 1-a): Limited application to adjacent CCs within the same frequency band (band). In this case, for any QCL type (A / B / C / D), a single TCI can be commonly applied to multiple CCs.

[0136] · (Operation Example 1-b): Limited application to adjacent CCs or non-adjacent CCs within the same frequency band (band).

[0137] ·(Operation Example 1-c): Limit the application to CCS within a frequency range (FR) (e.g., a frequency range of 52.6 GHz or higher, or 71 GHz or higher).

[0138] ·(Operation Example 1-d): Share the Spatial QCL property. As long as they are co-located, it applies to any number of CCS. Sharing the Spatial QCL property means that the reference signal (RS) on one CC refers to the RS on other CCs as the QQCL-TypeD source.

[0139] In addition, the TCI switching of multiple CCs based on a single DCI can operate according to any of the following operation examples.

[0140] ·(Operation Example 1-X): Set the higher-layer settings related to the TCI of multiple CCs to be the same.

[0141] Regarding the same TCI-StateId (refer to 3GPP TS38.331), qcl-Type 1 and qcl-Type 2 (refer to 3GPP TS38.331) can each (or both) refer to exactly the same RS (e.g., the RS on a specific cell) or multiple mutually QCLed RSs.

[0142] ·(Operation Example 1-Y): UE 200 does not assume the case where there are TCI states set for multiple CCs within a group.

[0143] In addition, for the capability of UE 200 and the RRC settings, they can operate in any of the following ways.

[0144] ·UE 200 reports to the network that it supports TCI switching for multiple CCs via a single DCI (per UE, FR, or band).

[0145] ·The network (gNB) explicitly sets the TCI switching for multiple CCs via a single DCI for each cell group (within CellGroupConfig), each cell (within ServingCellConfig), each BWP, or each search space. In addition, for this explicit setting, it can be performed when grouping multiple CCs and applying it jointly to this operation and other operations such as scheduling and HARQ-ACK bundling.

[0146] When compared with Operation Example 2 described later, Operation Example 1 can suppress the DCI overhead. On the other hand, when compared with Operation Example 2, the flexibility of the BWP setting and switching in Operation Example 1 is lower.

[0147] (3.4) Operation Example 2

[0148] In this operation example, when a single DCI schedules multiple CCs, a separate TCI field indicated by the DCI is applied to each CC (or group) of the multiple CCs.

[0149] That is, the DCI that schedules multiple CCs may have multiple TCI fields. Regarding the number of TCI fields, the operation can be performed according to any of the following operation examples.

[0150] · (Operation Example 2-1): Set it to the same number as the number of CCs set as a group by the higher layer. One TCI field is for one CC.

[0151] · (Operation Example 2-2): Set it to the same number as the number of subgroups set by the higher layer. One TCI field can be for one subgroup (i.e., one or more CCs).

[0152] For the TCI switching of multiple CCs based on a single DCI, the same operations (restrictions) as in Operation Example 1 (Operation Examples 1-a to 1-d) can be applied.

[0153] In addition, for the setting of the TCI state for multiple CCs, there may be no special restrictions regarding (Operation Example 2-1).

[0154] On the other hand, regarding (Operation Example 2-2), the TCI state settings of the CCs within the subgroup need to be the same (such as in Operation Example 1-X). Or, the UE 200 does not assume a situation where part of the TCI states are set for multiple CCs within the group (such as in Operation Example 1-Y).

[0155] In addition, for the capability of the UE 200 and the RRC setting, the operation can be performed in any of the following ways.

[0156] · The UE 200 reports to the network the situation of supporting TCI switching for multiple CCs via a single DCI (for each UE, FR, or band) (the same as in Operation Example 1). In addition, the UE 200 may also report the capability related to the number of CCs (or subgroups). The UE 200 can support separate TCI switching according to the DCI.

[0157] · The network (gNB) explicitly sets the TCI switching for multiple CCs via a single DCI for each cell group (within CellGroupConfig), each cell (within ServingCellConfig), each BWP, or each search space (the same as in Operation Example 1).

[0158] When compared with the above-described operation example 1, operation example 2 can improve the flexibility of setting and switching of the TCI state. On the other hand, when compared with operation example 1, the DCI overhead of operation example 2 will increase.

[0159] (3.5) CC group

[0160] Figure 8 and Figure 9 are diagrams for explaining the CC group related to the present embodiment. As described above, the CC group includes a plurality of CCs.

[0161] As Figure 8 shown, one CC group can be set. In Figure 8 , an example is shown where CC group #0 is set for CC#0 to CC#7. CC group #0 can also be referred to as a serving cell group. CC group #0 can be set by a higher layer parameter. For example, CC group #0 can be set by an RRC message. In the case of setting one CC group, the plurality of CCs included in the CC group can be determined in advance.

[0162] As Figure 9 shown, multiple CC groups can be set. In Figure 9 , an example is shown where CC group #0 is set for CC#0 to CC#3, and CC group #1 is set for CC#4 to CC#7. CC group #0 and CC group #1 can be referred to as serving cell groups. CC group #0 and CC group #1 can be set by a higher layer parameter. For example, CC group #0 and CC group #1 can be set by an RRC message.

[0163] In Figure 8 and Figure 9 , the CC group can be applied to the UE 200 according to the information element included in the RRC message, or can be applied to the UE 200 according to the information element included in the DCI. The CC group applied to the UE 200 can be a CC group selected from the CC groups set by the higher layer parameter. Application can also be referred to as enable or activate.

[0164] Similarly, the CC group can be not applied to the UE 200 according to the information element included in the RRC message, or can be not applied to the UE 200 according to the information element included in the DCI. The CC group not applied to the UE 200 can be a CC group selected from the CC groups set by the higher layer parameter. Not applying can also be referred to as disable or inactivate.

[0165] First, multiple CCs included in the CC group can be consecutive CCs in intra-band. The multiple CCs included in the CC group can be the CCs included in the serving cell, or the CCs included in the search space of the PDCCH. The search space of the PDCCH can be defined by RNTIs such as SI (System Information)-RNTI (Radio Network Temporary Identifier), RA (Random Access)-RNTI, TC (Temporary Cell)-RNTI, C (Cell)-RNTI, P (Paging)-RNTI, INT (Interruption)-RNTI, SFI (Slot Format Indication)-RNTI, TPC (Transmit Power Control)-PUSCH-RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI, SP (Semi Persistent)-CSI (Channel State Information)-RNTI, etc. The multiple CCs included in the CC group can be the CCs that commonly apply the settings of the serving cell. The settings of the serving cell can include TDD DL / UL Configuration, SCS specific carrier list.

[0166] Second, the CC group can be set and applied for one purpose or application. The CC group can also be set and applied for more than two purposes or applications. The predetermined purpose or application can include UL scheduling, DL scheduling, BWP switching, TCI (Transmission Configuration Indicator) switching, SFI (Slot Format Indicator).

[0167] Regarding the case of setting and applying the CC group for one purpose or application, Figure 9An example will be given and explained. For example, CC group #0 can be a group for UL scheduling, and CC group #1 can be a group for DL scheduling. Or CC group #0 can be a group for scheduling (both UL and DL), and CC group #1 can be a group for BWP switching. It can also be that CC group #0 is a group for TCI switching, and CC group #1 is a group for SFI. According to this structure, the CC groups can be set flexibly, and thus the performance can be improved.

[0168] Regarding the case of setting and applying CC groups for two or more purposes or operations, Figure 9 An example will be given and explained. For example, CC group #0 can be a group for scheduling (both UL and DL) and SFI, and CC group #1 can be a group for BWP switching and TCI switching. According to this structure, the structure of the gNB can be simplified.

[0169] (4) Functions and Effects

[0170] According to the above-described embodiments, the following functions and effects can be obtained. Specifically, the UE 200 can use DCI to schedule multiple CCs and can apply the TCI information indicated by the DCI to the multiple CCs. That is, the TCI information indicated by a single DCI can be commonly applied to multiple CCs.

[0171] Therefore, even in the case of setting multiple CCs such as in the case of using FR2x, efficient scheduling of CCs using DCI (specifically, TCI switching) can be achieved.

[0172] In this embodiment, the UE 200 can apply the TCI information to a group composed of multiple CCs. Therefore, for example, the same TCI switching can be applied to multiple CCs included in different groups such as for different purposes.

[0173] In this embodiment, the multiple CCs as objects can be restricted to adjacent CCs in the same frequency band. Therefore, the TCI information can be commonly applied to CCs that are assumed to have relatively similar characteristics. Thereby, both efficient scheduling of CCs using DCI and maintenance and improvement of radio quality can be achieved.

[0174] In this embodiment, the high-layer setting related to TCI can be set to be the same among the multiple CCs as objects. Therefore, TCI switching can be applied to CCs with common TCI states (QCL type, etc.).

[0175] (5) Other Embodiments

[0176] The above has described the embodiments, but is not limited to these descriptions, and various deformations and improvements can be made, which are obvious to those skilled in the art.

[0177] For example, in the above-described embodiment, the use of a high-frequency band such as FR2x is assumed, but the use of such a high-frequency band is not necessarily essential. That is, even when using FR1 or FR2, the information of the BWP represented by a single DCI as described above can be commonly applied to multiple CCs.

[0178] In addition, multiple CCs can be scheduled by being classified into a primary component carrier (PCC) and a secondary component carrier (SCC), etc.

[0179] The block diagrams ( Figure 4 ) used in the description of the above embodiment show blocks in terms of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a single device physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly (e.g., using wired, wireless, etc.) connected and these multiple devices can be used for implementation. The functional block can also be implemented by combining software with the above single device or the above multiple devices.

[0180] Functionally, there are judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, regarded as, broadcasting, notification, communication, forwarding, configuration, reconfiguration, allocation (allocating, mapping), assignment, etc., but are not limited to these. For example, a functional block (structural part) that makes transmission function is called a transmitting unit or a transmitter. In short, as described above, there is no particular limitation on the implementation method.

[0181] In addition, the above UE 200 can also function as a computer that processes the wireless communication method of the present disclosure. Figure 10 is a diagram showing an example of the hardware structure of the UE 200. As Figure 10As shown, the UE 200 can also be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0182] In addition, in the following description, the term "device" can be replaced with "circuit", "equipment (device)", "unit", etc. The hardware structure of the device can be configured to include one or more of the devices shown, or can be configured not to include some of the devices.

[0183] Each functional block of the UE 200 (refer to Figure 4 ) is implemented by any hardware element of the computer device or a combination of such hardware elements.

[0184] In addition, each function in the UE 200 is implemented by the following method: a predetermined software (program) is read into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs operations and controls at least one of the communication of the communication device 1004 or the reading and writing of data in the memory 1002 and the storage 1003.

[0185] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 can also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, etc.

[0186] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes based on this. As the program, a program that causes the computer to execute at least a part of the operations described in the above embodiments is used. In addition, regarding the above various processes, although it is described that the above various processes are executed by one processor 1001, the above various processes can also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be installed on one or more chips. In addition, the program can also be sent from a network via a telecommunication line.

[0187] The memory 1002 is a computer-readable recording medium, and may be constituted by at least one of, for example, a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), and the like. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), and the like. The memory 1002 can store a program (program code), a software module, etc. that can execute the method according to an embodiment of the present disclosure.

[0188] The storage 1003 is a computer-readable recording medium, and may be constituted by at least one of, for example, an optical disc such as a CD-ROM, a hard disk drive, a floppy disk, a magneto-optical disc (e.g., a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc, a smart card, a flash memory (e.g., a card, a stick, a key drive)), a Floppy (registered trademark) disk, a magnetic stripe, and the like. The storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, a database, a server, or other appropriate medium including at least one of the memory 1002 and the storage 1003.

[0189] The communication device 1004 is a hardware (transceiver device) for communicating between computers via at least one of a wired network and a wireless network. For example, it may also be referred to as a network device, a network controller, a network card, a communication module, and the like.

[0190] The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD).

[0191] The input device 1005 is an input device that accepts input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (e.g., a display, a speaker, an LED lamp, etc.). In addition, the input device 1005 and the output device 1006 may be integrally formed (e.g., a touch panel).

[0192] In addition, devices such as the processor 1001 and the memory 1002 are connected via a bus 1007 for communicating information. The bus 1007 can be constituted by a single bus, or can be constituted by different buses for each device pair.

[0193] In addition, the device can 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), a field programmable gate array (FPGA), etc., and a part or all of the functional blocks can also be implemented by this hardware. For example, the processor 1001 can also be installed using at least one of these hardware components.

[0194] In addition, the notification of information is not limited to the forms / embodiments described in the present disclosure, and other methods can also be used. For example, the notification of information can be implemented through physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI)), high layer signaling (e.g., RRC signaling, medium access control (MAC) signaling, broadcast information (master information block (MIB), system information block (SIB))), other signals, or a combination thereof. In addition, RRC signaling can also be referred to as an RRC message. For example, it can also be an RRC connection setup message, an RRC connection reconfiguration message, etc.

[0195] Each form / embodiment described in the present disclosure can also be applied to at least one of Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), systems using other appropriate systems, and next-generation systems extended therefrom. In addition, multiple systems (for example, a combination of at least one of LTE and LTE-A and 5G, etc.) can also be combined and applied.

[0196] For the processing procedures, timings, flows, etc. of each form / embodiment described in the present disclosure, the order can be changed without contradiction. For example, for the methods described in the present disclosure, the order shown in the examples indicates the elements of various steps, but is not limited to the specific order shown.

[0197] In the present disclosure, specific actions performed by the base station may be performed by its upper node according to circumstances. In a network composed of one or more network nodes having a base station, it is obvious that various actions performed for communicating with the terminal can be performed by at least one of the base station and other network nodes other than the base station (for example, MME or S-GW, etc. are considered, but not limited to these). In the above, the case where there is one other network node other than the base station is illustrated, but the other network nodes may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0198] Information, signals (such as information) can be output from a higher layer (or lower layer) to a lower layer (or higher layer). It can also be input or output via multiple network nodes.

[0199] The input or output information can be stored in a specific location (e.g., memory), or can be managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0200] The determination can be made by a value represented by 1 bit (0 or 1), can be made by a Boolean value (true or false), or can also be made by a numerical comparison (e.g., comparison with a predetermined value).

[0201] Each form / embodiment described in the present disclosure can be used alone, can be used in combination, or can also be switched according to execution. In addition, the notification of predetermined information is not limited to being performed explicitly (e.g., notification of "it is X"), and can also be performed implicitly (e.g., without notification of the predetermined information).

[0202] For software, regardless of whether it is called software, firmware, middleware, microcode, hardware description language, or by other names, it should be broadly interpreted as referring to commands, command sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc.

[0203] In addition, software, commands, information, etc. can be transmitted and received via a transmission medium. For example, when software is sent from a web page, 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 technologies and wireless technologies is included in the definition of the transmission medium.

[0204] The information, signals, etc. described in the present disclosure can also be represented using any one of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination of these.

[0205] In addition, terms described in this disclosure and terms required to understand this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC: Component Carrier) may be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0206] Terms such as "system" and "network" used in this disclosure may be used interchangeably.

[0207] In addition, information, parameters, etc. described in this disclosure may be represented by absolute values, may be represented by relative values with respect to a predetermined value, or may also be represented by corresponding other information. For example, radio resources may also be indicated by an index.

[0208] The names used for the above parameters are non - restrictive in any aspect. Furthermore, mathematical expressions using these parameters are sometimes different from the content explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by appropriate names, so the various names assigned to these various channels and information elements are non - restrictive in any aspect.

[0209] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. Sometimes, base stations are also referred to as macro cells, small cells, femto cells, pico cells, etc.

[0210] A base station can accommodate one or more (e.g., 3) cells (also referred to as sectors). When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also be provided with communication services through a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).

[0211] Terms such as "cell" or "sector" refer to a part or the whole of the coverage area of at least one of a base station and a base station subsystem that provides communication services within that coverage range.

[0212] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" can be used interchangeably.

[0213] For a mobile station, those skilled in the art sometimes also refer to it using the following terms: subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

[0214] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. Additionally, at least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves in an unmanned manner (e.g., a drone, a self-driving car, etc.), or a robot (humanoid or non-humanoid). Additionally, at least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0215] Furthermore, the base station in the present disclosure can also be replaced with a mobile station (user terminal, the same hereinafter). For example, regarding a structure in which communication between a base station and a mobile station is replaced with communication between multiple mobile stations (e.g., it can also be referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), various forms / embodiments of the present disclosure can also be applied. In this case, it can also be configured such that the mobile station has the functions of the base station. Additionally, terms such as "uplink" and "downlink" can also be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, an uplink channel, a downlink channel, etc. can also be replaced with a side channel.

[0216] Similarly, the mobile station in the present disclosure can be replaced with a base station. In this case, it can be configured such that the base station has the functions of the mobile station.

[0217] A radio frame can be composed of one or more frames in the time domain. In the time domain, each of the one or more frames can be referred to as a subframe.

[0218] A subframe can be composed of one or more time slots in the time domain. The subframe can have a fixed time length (e.g., 1 ms) independent of the numerology.

[0219] The numerology can be communication parameters applied to at least one of transmission and reception of a certain signal or channel. The numerology can represent, for example, at least one of 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 a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0220] A time slot can be composed of one or more symbols (orthogonal frequency division multiplexing (OFDM) symbols, single carrier frequency division multiple access (SC-FDMA) symbols, etc.) in the time domain. The time slot can be a time unit based on the numerology.

[0221] A time slot can contain multiple mini-slots. Each mini-slot can be composed of one or more symbols in the time domain. In addition, a mini-slot can also be called a sub-slot. A mini-slot can be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot can be called a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can be called a PDSCH (or PUSCH) mapping type B.

[0222] A radio frame, a subframe, a time slot, a mini-slot, and a symbol all represent time units for transmitting a signal. A radio frame, a subframe, a time slot, a mini-slot, and a symbol can be respectively given corresponding other names.

[0223] For example, 1 subframe can be called a transmission time interval (TTI), multiple consecutive subframes can also be called a TTI, 1 time slot or 1 mini-slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can also be a period shorter than 1 ms (e.g., 1 - 13 symbols), or can also be a period longer than 1 ms. In addition, the unit representing a TTI can be not a subframe, but a time slot, a mini-slot, etc.

[0224] Here, the TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate radio resources (such as the bandwidth and transmission power that can be used in each user terminal) to each user terminal in units of TTI. Additionally, the definition of the TTI is not limited to this.

[0225] The TTI can be the transmission time unit of data packets (transport blocks), code blocks, codewords, etc. after channel coding, or can also be the processing unit for scheduling, link adaptation, etc. Additionally, when the TTI is given, the actual time interval (such as the number of symbols) to which the transport block, code block, codeword, etc. are mapped can be shorter than the TTI.

[0226] Additionally, when 1 time slot or 1 mini time slot is referred to as the TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can constitute the minimum time unit for scheduling. Furthermore, the number of time slots (mini time slots) that constitute the minimum time unit for this scheduling can be controlled.

[0227] The TTI with a time length of 1 ms is also referred to as the normal TTI (TTI in LTE Rel.8 - 12), normal TTI, long TTI, normal subframe, long subframe, time slot, etc. The TTI shorter than the normal TTI can be called the shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini time slot, sub - time slot, time slot, etc.

[0228] Additionally, for the long TTI (e.g., normal TTI, subframe, etc.), it can be replaced with a TTI having a time length exceeding 1 ms, and for the short TTI (e.g., shortened TTI, etc.), it can be replaced with a TTI having a TTI length less than the long TTI and having a TTI length of 1 ms or more.

[0229] The resource block (RB) is the resource allocation unit in the time domain and the frequency domain. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers contained in the RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in the RB can also be determined according to the parameter set.

[0230] Furthermore, the time domain of the RB can contain one or more symbols, and can be the length of 1 time slot, 1 mini time slot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. can each be composed of one or more resource blocks.

[0231] In addition, one or more RBs may be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0232] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, 1 RE may be a radio resource area of 1 sub-carrier and 1 symbol.

[0233] A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth, etc.) represents a subset of consecutive common resource blocks (common RBs) used for a certain parameter set in a certain carrier. Here, the common RBs can be determined by the indices of the RBs based on the common reference point of the carrier. PRBs are defined in a certain BWP and numbered within that BWP.

[0234] A BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs can be set for a UE within one carrier.

[0235] At least one of the set BWPs can be active, and it is not assumed that the UE transmits or receives a predetermined signal / channel outside the active BWP. In addition, "cell", "carrier", etc. in the present disclosure can be replaced by "BWP".

[0236] The structures of the above-mentioned radio frames, sub-frames, time slots, mini time slots, symbols, etc. are merely illustrative. For example, the number of sub-frames included in a radio frame, the number of time slots per sub-frame or radio frame, the number of mini time slots included in a time slot, the number of symbols and RBs included in a time slot or mini time slot, the number of sub-carriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, etc. within a TTI can be changed in various ways.

[0237] Terms such as "connected" and "coupled", and all variations of these terms, are intended to represent all direct or indirect connections or couplings between two or more elements, and may include cases where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The coupling or connection between elements can be a physical coupling or connection, a logical coupling or connection, or a combination of these. For example, "Access" can be used to replace "connected". In the context of the present disclosure, for two elements, it can be considered that they are mutually "connected" or "coupled" by using at least one of one or more electric wires, cables, and printed electrical connections, and by using electromagnetic energy having wavelengths in wireless frequency bands, microwave regions, and optical (including both visible and invisible) regions, as some non-limiting and non-inclusive examples.

[0238] The reference signal can be abbreviated as Reference Signal (RS), or can be called a Pilot according to the applied standard.

[0239] The description "in accordance with" used in the present disclosure does not mean "only in accordance with" unless otherwise clearly stated. In other words, the description "in accordance with" means both "only in accordance with" and "at least in accordance with".

[0240] The "unit" in the structure of each of the above devices can be replaced with "section", "circuit", "device", etc.

[0241] Any reference to elements using terms such as "first", "second", etc. used in the present disclosure does not entirely limit the quantity and order of these elements. These terms are used in the present disclosure as a simple method for distinguishing between two or more elements. Therefore, the reference to the first and second elements does not mean that only two elements can be adopted here or that the first element must precede the second element in any form.

[0242] When the terms "include", "including", and their variations are used in the present disclosure, these terms are inclusive in the same way as the term "comprising". Also, the term "or" used in the present disclosure does not mean exclusive or.

[0243] In the present disclosure, for example, when articles are added through translation as in the case of a, an, and the in English, the present disclosure also includes cases where the nouns following these articles are in the plural form.

[0244] As used in this disclosure, terms such as "determining" sometimes include various actions. For example, "determining" may include regarding matters that have been judged, calculated, computed, processed, derived, investigated, looked up (e.g., looked up in a table, database, or other data structure), or ascertained as matters that have been "determined". In addition, "determining" may include regarding matters that have been received (e.g., receiving information), transmitted (e.g., transmitting information), input, output, accessed (e.g., accessing data in memory), etc. as matters that have been "determined". In addition, "determining" may include regarding matters that have been resolved, selected, chosen, established, compared, etc. as matters that have been "determined". That is, "determining" may include matters that have "determined" any action. In addition, "determining" may also be replaced by "assuming", "expecting", "considering", etc.

[0245] In this disclosure, the term "A and B are different" may also mean "A and B are different from each other". In addition, this term may also mean "A and B are each different from C". Terms such as "separated" and "combined" are also interpreted in the same way as "different".

[0246] As described above, this disclosure has been described in detail. However, for those skilled in the art, it should be clear that this disclosure is not limited to the embodiments described in this disclosure. This disclosure can be implemented in the form of modifications and changes without departing from the gist and scope of this disclosure determined by the claims. Therefore, the purpose of the description of this disclosure is to illustrate, and it has no restrictive meaning for this disclosure.

[0247] Reference numeral description:

[0248] 10 Wireless communication system

[0249] 20 NG-RAN

[0250] 100A, 100B gNB

[0251] UE 200

[0252] 210 Wireless signal transceiver unit

[0253] 220 Amplifier unit

[0254] 230 Modulation and demodulation unit

[0255] 240 Control signal and reference signal processing unit

[0256] 250 Encoding / decoding unit

[0257] 260 Data transceiver unit

[0258] 270 Control unit

[0259] 300 DCI

[0260] 310 TCI field

[0261] BM Beam

[0262] 1001 Processor

[0263] 1002 Memory

[0264] 1003 Storage

[0265] 1004 Communication device

[0266] 1005 Input device

[0267] 1006 Output device

[0268] 1007 Bus

Claims

1. A terminal, wherein, The terminal has: a receiving unit that receives downlink control information from a network; and a control unit that, based on a setting of a higher layer, applies, with a bandwidth part BWP as a reference, a state indicated by a transmission setting indicated by the downlink control information to a plurality of component carriers, wherein the control unit does not assume that the state indicated by the transmission setting is set for a plurality of component carriers within a frequency band.

2. The terminal according to claim 1, wherein, The plurality of component carriers are a plurality of component carriers within the same frequency band.

3. A wireless communication method in a terminal, wherein, The wireless communication method includes the following steps: receiving downlink control information from a network; and based on a setting of a higher layer, applying, with a bandwidth part BWP as a reference, a state indicated by a transmission setting indicated by the downlink control information to a plurality of component carriers, in the applying step, not assuming that the state indicated by the transmission setting is set for a plurality of component carriers within a frequency band.

4. A communication system, which includes a base station and a terminal, wherein, The base station has a transmission unit that transmits downlink control information indicating a transmission setting, The terminal has: a receiving unit that receives the downlink control information; and a control unit that, based on a setting of a higher layer, applies, with a bandwidth part BWP as a reference, a state indicated by a transmission setting indicated by the downlink control information to a plurality of component carriers, wherein the control unit does not assume that the state indicated by the transmission setting is set for a plurality of component carriers within a frequency band.

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