Terminals, base stations, communication systems, and communication methods

Abstract

This terminal includes: a control unit that assumes a scheduling cell and a scheduled cell in multicarrier scheduling according to a single piece of control information; and a reception unit that receives the single piece of control information from the scheduling cell. On the basis of the single piece of control information, the reception unit receives a plurality of the scheduled cells. The control unit determines whether an unlicensed frequency cell can be configured as the scheduling cell.

Description

Technical Field

[0001] The present invention relates to a terminal, a base station , communication system and a communication method in a wireless communication system.

Background Art

[0002] In NR (New Radio) (also referred to as "5G"), which is a successor system to LTE (Long Term Evolution), technologies that satisfy requirements such as a large-capacity system, high data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, power saving, etc. are being studied (for example, Non-Patent Document 1).

[0003] Furthermore, the study of 6G as the next-generation wireless communication method after 5G has been started, and the realization of wireless quality exceeding 5G is expected. For example, in 6G, studies are underway to achieve further increased capacity, use of new frequency bands, further reduced latency, further increased reliability, further reduced power consumption, and expansion of coverage in new areas (high altitude, sea, space) by non-terrestrial networks (for example, Non-Patent Document 2).

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Non-Patent Document 2

Non-Patent Document 3

Non-Patent Document 4

Non-Patent Document 5

Non-Patent Document 6

[0005] Studies are underway to enhance multi-carrier operations. These studies explore methods for scheduling physical downlink or uplink shared channels using a single DCI (Downlink Control Information) in a multi-carrier environment. Additionally, unlicensed bands will be defined for certain frequency bands within the 5G or 6G available frequency ranges. Various regulations will be defined for these unlicensed bands, such as implementing LBT (Listen before talk) when accessing channels.

[0006] In this case, when performing multi-carrier scheduling in the unlicensed band, it is necessary to follow a procedure that takes LBT (Low-Band Time) into consideration.

[0007] This invention has been made in view of the above points, and aims to perform multi-carrier scheduling in the unlicensed band. [Means for solving the problem]

[0008] According to the disclosure technology, A terminal having: a control unit that sets capability information regarding whether an unlicensed cell can be set as a scheduling cell in multi-carrier scheduling using a single control information for scheduling a physical uplink sharing channel or a physical downlink sharing channel, based on whether the cell scheduled by the scheduling cell is an unlicensed cell; a transmission unit that transmits the capability information to a base station; and a reception unit that receives the single control information in the scheduling cell. It will be provided. [Effects of the Invention]

[0009] According to the disclosed technology, multi-carrier scheduling can be performed in unlicensed bands. [Brief explanation of the drawing]

[0010] [Figure 1]It is a diagram showing a configuration example (1) of a wireless communication system in an embodiment of the present invention. [Figure 2] It is a diagram showing a configuration example (2) of a wireless communication system in an embodiment of the present invention. [Figure 3] It is a diagram showing an example (1) of a scheduling operation. [Figure 4] It is a diagram showing an example (2) of a scheduling operation. [Figure 5] It is a diagram showing an example (3) of a scheduling operation. [Figure 6] It is a diagram showing an example of a frequency band in an embodiment of the present invention. [Figure 7] It is a diagram showing an example of LBT in an embodiment of the present invention. [Figure 8] It is a sequence diagram for explaining an example of a scheduling operation in an embodiment of the present invention. [Figure 9] It is a diagram showing an example of the functional configuration of the base station 10 according to an embodiment of the present invention. [Figure 10] It is a diagram showing an example of the functional configuration of the terminal 20 according to an embodiment of the present invention. [Figure 11] It is a diagram showing an example of the hardware configuration of the base station 10 or the terminal 20 according to an embodiment of the present invention. [Figure 12] It is a diagram showing an example of the configuration of the vehicle 2001 in an embodiment of the present invention.

Embodiments for Carrying out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

[0012] In the operation of the wireless communication system according to the embodiments of the present invention, existing technologies may be used as appropriate. However, such existing technologies include, for example, existing LTE, but are not limited to existing LTE. Furthermore, the term "LTE" as used herein has a broad meaning that includes LTE-Advanced and LTE-Advanced and later methods (e.g., NR), unless otherwise specified.

[0013] Furthermore, in the embodiments of the present invention described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), which are used in existing LTE systems, will be used. This is for convenience of description, and similar signals, functions, etc., may be called by other names. Also, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even if a signal is used in NR, it is not necessarily explicitly stated as "NR-".

[0014] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or any other method (for example, a Flexible Duplex).

[0015] Furthermore, in the embodiments of the present invention, "configuring" wireless parameters may mean that predetermined values ​​are pre-configured, or that wireless parameters notified from the base station 10 or terminal 20 are configured.

[0016] Figure 1 shows an example configuration (1) of a wireless communication system according to an embodiment of the present invention. The wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20, as shown in Figure 1. Although Figure 1 shows one base station 10 and one terminal 20, this is an example, and there may be multiple base stations 10 and terminal 20.

[0017] Base station 10 is a communication device that provides one or more cells and communicates wirelessly with terminal 20. The physical resources of the radio signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. Base station 10 transmits synchronization signals and system information to terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is transmitted, for example, in NR-PBCH and is also called broadcast information. Synchronization signals and system information may be called SSB (SS / PBCH block). As shown in Figure 1, base station 10 transmits control signals or data to terminal 20 via DL (Downlink) and receives control signals or data from terminal 20 via UL (Uplink). Both base station 10 and terminal 20 are capable of transmitting and receiving signals using beamforming. Furthermore, both base station 10 and terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via secondary cells (SCell) and primary cells (PCell) using Carrier Aggregation (CA). In addition, the terminal 20 may communicate via the primary cell of base station 10 and the primary secondary cell group cell (PSCell) of another base station 10 using Dual Connectivity (DC).

[0018] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in Figure 1, Terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 also receives various reference signals transmitted from the base station 10 and performs propagation path quality measurements based on the reception results of these reference signals.

[0019] Terminal 20 is capable of performing carrier aggregation, which involves bundling multiple cells (multiple CCs (Component Carriers)) together to communicate with base station 10. Carrier aggregation uses one PCell (Primary cell) and one or more SCells (Secondary cells). In addition, a PUCCH-SCell with a PUCCH may be used.

[0020] Figure 2 is a diagram illustrating an example (2) of a wireless communication system in an embodiment of the present invention. Figure 2 shows an example configuration of a wireless communication system when DC (Dual connectivity) is performed. As shown in Figure 2, a base station 10A that acts as an MN (Master Node) and a base station 10B that acts as an SN (Secondary Node) are provided. Base stations 10A and 10B are each connected to the core network. Terminal 20 can communicate with both base station 10A and base station 10B.

[0021] A cell group provided by base station 10A, which is the MN (Mobile Network Unit), is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is the SN (Stationary Network Unit), is called an SCG (Secondary Cell Group). In a data center, an MCG consists of one PCell and one or more SCells, and an SCG consists of one PSCell (Primary SCG Cell) and one or more SCells.

[0022] The processing operations in this embodiment may be performed using the system configuration shown in Figure 1, the system configuration shown in Figure 2, or any other system configuration.

[0023] Studies are underway to enhance multi-carrier operation. These studies explore a method for scheduling PDSCH or PUSCH in a multi-cell environment using a single DCI (Downlink Control Information). Hereafter, "PDSCH or PUSCH" will also be referred to as "PDSCH / PUSCH".

[0024] In multi-cell scheduling, both intraband carrier aggregation and interband carrier aggregation are being considered. Furthermore, the use of both FR1 (Frequency Range 1) and FR2 (Frequency Range 2) in multi-cell scheduling is being considered. Hereafter, multi-cell scheduling and multi-carrier scheduling may be interchangeable.

[0025] When scheduling PDSCH / PUSCH for multiple CCs using a single DCI, compared to preparing a separate DCI for each CC and scheduling each CC individually, the advantage is that it reduces the monitoring load (e.g., the number of blind decodes) associated with the DCI (PDCCH). Furthermore, the smaller the size of the single DCI (compared to the size of the conventional DCI multiplied by the number of CCs), the lower the total PDCCH overhead becomes. On the other hand, a disadvantage is that the instructions cannot be flexibly changed for each CC. If the instructions need to be flexibly changed, the size of the single DCI increases, leading to a worsening of the PDCCH error rate and increased overhead. Also, if the PDCCH is decoded incorrectly, data reception for all CCs will fail.

[0026] Figure 3 shows an example of scheduling operation (1). As shown in Figure 3, in conventional self-carrier scheduling, PDCCH and DCI are transmitted for each CC, and PDSCH / PUSCH are scheduled to that CC.

[0027] Figure 4 shows an example of scheduling operation (2). As shown in Figure 4, in conventional cross-carrier scheduling, PDCCH and DCI in other CCs schedule PDSCH / PUSCH to each CC.

[0028] Figure 5 shows an example of scheduling operation (3). As shown in Figure 5, in multi-carrier scheduling, a single DCI schedules PDSCH / PUSCH to each CC.

[0029] Figure 6 shows an example of frequency bands in an embodiment of the present invention. As shown in Figure 6, the FRs are defined. In FR1 up to 7.125 GHz, the subcarrier spacing is 15 kHz, 30 kHz, or 60 kHz, and the bandwidth is from 5 to 100 MHz. In FR2-1 from 24.25 GHz to 52.6 GHz, the subcarrier spacing is 60 kHz, 120 kHz, or 240 kHz, and the bandwidth is from 50 MHz to 400 MHz. In FR2-2 from 52.6 GHz to 71 GHz, the subcarrier spacing is 120 kHz, 480 kHz, or 960 kHz.

[0030] For example, unlicensed bands in the 5GHz-7GHz range could include 5.15GHz to 5.35GHz, 5.47GHz to 5.725GHz, and above 5.925GHz.

[0031] For example, unlicensed bands in the 60GHz band could include those from 59GHz to 66GHz, from 57GHz to 64GHz or 66GHz, and from 59.4GHz to 62.9GHz.

[0032] In unlicensed bands, various regulations are in place to prevent interference with other systems or equipment.

[0033] For example, in the 5GHz-7GHz band, Listen Before Talk (LBT) is performed when accessing a channel. The base station 10 or terminal 20 performs power detection for a predetermined period immediately before transmission, and if the power exceeds a certain value, i.e., if it detects transmission from another device, it stops transmitting. A Maximum Channel Occupancy Time (MCOT) is also specified. MCOT is the maximum time interval during which transmission is permitted to continue if transmission is started after LBT. Furthermore, as an Occupied Channel Bandwidth (OCB) requirement, when transmitting using a certain carrier bandwidth, it must use at least X% of that bandwidth. For example, in Europe, it is required to use 80% to 100% of the Nominal Channel Bandwidth (NCB). The OCB requirement aims to ensure that power detection for channel access is performed correctly. In addition, regarding maximum transmit power and maximum power spectral density, it is stipulated that transmission must be performed at or below a specified transmit power. For example, in Europe, the maximum transmit power is 23 dBm in the 5150 MHz-5350 MHz band. Also, in Europe, the maximum power spectral density is 10 dBm / MHz in the 5150 MHz-5350 MHz band.

[0034] For example, in the 60GHz band, LBT is performed when accessing a channel. The base station 10 or terminal 20 performs power detection for a predetermined period immediately before transmission, and if the power exceeds a certain value, i.e., if it detects transmission from another device, it stops transmitting. Furthermore, it is stipulated that transmission must be performed at or below a predetermined transmission power with respect to maximum transmission power and maximum power spectral density.

[0035] NR specifies four types of channel access procedures, based on the differences in the behavior of LBT time reporting (the period during which sensing is performed).

[0036] Type 1) Performs variable-time sensing before transmission. Also known as Category 4 LBT. Type 2A) Performs 25μs sensing before transmission. Also known as Category 2LBT. Type 2B) Performs 16μs sensing before transmission. Also known as Category 2LBT. Type 2C) Transmission begins without LBT. Similar to transmission on licensed bands.

[0037] Figure 7 is a diagram illustrating an example of an LBT in an embodiment of the present invention. Figure 7 shows an example of a Type 1 channel access procedure. Type 1 is further classified into four classes, which indicate channel access priority classes based on differences in sensing length. Sensing is performed during the following two periods.

[0038] The first period is the Prioritization Period or defer duration, which is 16 + 9 × m p It has a length of [μs]. p A fixed value is defined for each channel access priority class.

[0039] The second period is a backoff procedure with a length of 9 × N [μs]. The value of N is randomly determined from a certain range (see Non-Patent Document 3).

[0040] In the above, the 9μs sensing period may also be called the sensing slot period.

[0041] In the example in Figure 7, m p = 3, and the hold period is 43 μs. As shown in Figure 7, the backoff counter is fixed while the channel is busy. Also, as shown in Figure 7, if the transmission from NR-U gNB and wireless LAN node #2 collide and an error is detected, the contention window size is expanded from 3 to 13 in NR-U gNB.

[0042] Furthermore, 3GPP Release 16 specifies RB sets and intracell guard bands (see Non-Patent Document 4) for FR1 NR-U. When the CC bandwidth is wider than the LBT bandwidth (i.e., 20 MHz RB sets), transmission may be possible or not differ for each RB set. Terminal 20 reports to the network whether it supports PDSCH reception only for some of the RB sets that have successfully completed LBT using the UE capability parameter dl-ReceptionLBT-subsetRB-r16 (see Non-Patent Document 5). PUSCH transmission is not permitted unless LBT is successful for all RB sets (see Non-Patent Document 3).

[0043] Furthermore, channel access procedures for multi-channel transmission are specified (see Non-Patent Document 3).

[0044] DL Type A1: LBT is performed independently for each channel. The random backoff counter is set for each channel. DL Type A2: LBT is performed independently for each channel. The random backoff counter is the random backoff counter of the channel with the largest CW size. DL Type B1: If LBT is successful on the representative channel, short-term LBT is performed on the remaining channels. The random backoff counter is common, and the CW size is increased if NACK is 80% or higher. DL Type B2: If LBT is successful on the representative channel, short-term LBT is performed on the remaining channels. A random backoff counter is set for each channel. UL: LBT is performed independently for each channel. The random backoff counter is set for each channel.

[0045] Furthermore, the Type 2 HARQ codebook (see Non-Patent Document 6) has been enhanced. By setting the PDSCH-to-HARQ feedback timing indicator value to an inapplicable value during scheduling, feedback for multiple PDSCHs can be triggered together by DCIs transmitted at other timings.

[0046] Furthermore, Type 3 HARQ codebooks (see Non-Patent Document 6) are supported. HARQ-ACKs for all HARQ processes can be triggered collectively.

[0047] Furthermore, 3GPP Release 17 specifies channel access procedures for multi-channel transmission in NR-U for FR2-2 (e.g., the 60 GHz band) (see Non-Patent Document 3). In this procedure, LBT is performed independently for each channel. In addition, LBT mode settings (see Non-Patent Document 3) are specified. Whether or not LBT is performed is changed depending on whether or not LBT mode is set in SIB1 or RRC signaling. For example, LBT mode is not set in license band cells.

[0048] Furthermore, as a DCI design for multi-carrier scheduling, in the DCI used for multi-carrier scheduling, whether a value is notified for each CC being scheduled or whether a value is notified in common among the CCs being scheduled may vary depending on specific conditions. These specific conditions may be, for example, whether it is intraband or not, whether it is interband or not, whether it is FR1 or not, whether it is FR2 or not, a predetermined number of CCs, a predetermined SCS, etc.

[0049] For example, depending on whether the scheduled CC consists only of licensed CCs, includes unlicensed CCs, or consists only of unlicensed CCs, at least one field may differ in whether it is common to all CCs or notified per CC.

[0050] For example, the PDSCH-to-HARQ feedback timing indicator may always be assumed to be common across CCs, i.e., a single field or value. The specification may define, or may be set by the base station 10, which PDSCH the field value of the PDSCH-to-HARQ feedback timing indicator is interpreted based on. For example, it may be based on the cell transmitting the PUCCH, or on the PDSCH with the latest timing.

[0051] For example, among the DCI fields (see Non-Patent Document 7), the One-shot HARQ-ACK request, Enhanced Type 2 codebook indicator, PDSCH group index, New feedback indicator, and ChannelAccess-CPext may always be assumed to be common across CCs, or these fields may not be assumed in multi-carrier scheduling DCI.

[0052] For example, among the DCI fields (see Non-Patent Document 7), the DFI flag and ChannelAccess-CPext-CAPC may always be assumed to be common among CCs, or they may be assumed to be notifications for specific CCs, or they may be assumed to be notifications for all scheduled CCs, or they may be assumed to be per CC, or each field may be defined to specify each of multiple scheduled CCs, or the target CC may be switched depending on specific conditions, or the field may not be assumed in multi-carrier scheduling DCI. The specific conditions may be the maximum number of scheduled CCs set in RRC, or whether it is intraband or interband or not.

[0053] For example, the applicability of multi-carrier scheduling DCI may be defined according to at least one of the following conditions. For example, multi-carrier scheduling DCI may be applicable only in cases where a CC is included in a CC that is scheduled only for a specific CC. Such a specific CC may be, for example, a CC that does not include unlicensed frequencies, or a CC that does not include both licensed and unlicensed frequencies.

[0054] Furthermore, as a setting for scheduling cells for multi-carrier scheduling, the base station 10 may set the scheduling cells to be used for multi-carrier PDSCH / PUSCH scheduling on the terminal 20. Multiple scheduling cells may be set for at least one of the cells to be scheduled.

[0055] For example, the possible scheduling methods for multiple scheduling cells may be limited by specific conditions or defined by UE capabilities. For instance, at least one of the following may be limited by specific conditions or UE capabilities: the number of scheduling cells that can be set, the type of cell being scheduled or scheduling, the frequency, the SCS, etc. Specific conditions may include, for example, whether or not it is a P(S)Cell, whether or not it is a SCell, whether or not it is a PUCCH cell, whether or not it is a cell of a specific FR, whether or not it is a cell of a specific SCS, whether or not it is a licensed frequency cell, whether or not it is an unlicensed frequency cell, whether or not a cell has a specific search space set, or whether or not a cell does not have a specific search space set.

[0056] It was unclear how to support multi-carrier scheduling that includes unlicensed cells. An unlicensed cell may also refer to a cell that uses unlicensed frequencies. Hereafter, unlicensed cells will also be referred to as unlicensed frequency cells.

[0057] For example, if the scheduling cell that sends and receives PDCCH is an unlicensed cell, and PDCCH cannot be transmitted due to the LBT result, then PDCCH transmission by multiple cells or multiple CCs will also be impossible.

[0058] For example, if a scheduled cell that sends and receives PDSCH / PUSCH signals includes an unlicensed cell, the results of the Limit Break Test (LBT) may result in some cells (licensed cells or unlicensed cells that succeeded in LBT) being able to transmit, while the remaining cells (unlicensed cells that failed LBT) are unable to transmit.

[0059] For example, if the PUCCH cell, which is the cell that sends and receives HARQ-ACKs to PDSCH, is an unlicensed cell, the LBT result may prevent the HARQ-ACK from being sent.

[0060] Therefore, this document clarifies terminal operation and base station configuration when unlicensed cells are involved in single DCI multi-carrier PDSCH / PUSCH scheduling.

[0061] For example, the availability of unlicensed frequency cells (frequency for shared spectrum channel access operation) in single DCI multi-carrier PDSCH / PUSCH scheduling may be specified.

[0062] For example, the ability to configure unlicensed frequency cells as scheduled cells may be defined for each single DCI multi-carrier PDSCH / PUSCH scheduling.

[0063] For example, when a scheduled cell includes at least one unlicensed frequency cell, the applicable or inapplicable multi-channel access methods may be defined for each unlicensed frequency cell.

[0064] For example, an enhanced type 2 HARQ codebook (enhanced dynamic codebook) may be configured to define the behavior when the candidates for scheduled cells include both unlicensed and licensed frequency cells.

[0065] Figure 8 is a sequence diagram showing an example of scheduling operation in an embodiment of the present invention. In step S11, the base station 10 transmits settings related to multi-carrier scheduling to the terminal 20. In the subsequent step S12, the base station 10 performs DCI-based multi-carrier scheduling on the terminal 20, applying the settings. The settings performed from the base station 10 to the terminal 20 in an embodiment of the present invention may also be performed in step S11.

[0066] For example, the settings transmitted from base station 10 to terminal 20 may be notified via RRC (Radio Resource Control) signaling, SIB (System Information Block), MAC-CE (Medium Access Control - Control Element), or DCI, or via a combination of multiple signaling methods.

[0067] For example, for each unlicensed frequency (frequency for shared spectrum channel access operation) cell in a single DCI multi-carrier PDSCH / PUSCH scheduling, the possibility of setting it as a scheduling cell may be defined as shown in Option 1) or Option 2). Terminal 20 may determine whether or not an unlicensed frequency cell can be set as a scheduling cell based on the said definition.

[0068] Option 1) Unlicensed cells may be specified as not being available as scheduling cells.

[0069] Option 2) It may be specified that an unlicensed cell can only be set as a cell for scheduling if certain conditions are met. Alternatively, it may be specified that an unlicensed cell cannot be set as a cell for scheduling if certain conditions are not met. For example, the specific conditions may be defined as shown in 1)-4) below, and multiple combinations of 1)-4) may constitute the specific conditions.

[0070] 1) If terminal 20 reports to the network as a UE capability whether it can be configured as a cell that schedules unlicensed cells, and that UE capability can be configured as a cell that schedules unlicensed cells.

[0071] 2) When the unlicensed cell is a specific cell. For example, when it is a PCell. For example, when it is a PUCCH-SCell.

[0072] 3) When the scheduled cells meet certain conditions. For example, when all scheduled cells are unlicensed cells. For example, when at least one scheduled cell is an unlicensed cell. For example, when all scheduled cells are within the same FR. For example, when all scheduled cells are within the same band. For example, when all scheduled cells are within the same SCS. For example, when the SCS difference between scheduled cells is within a predetermined range. For example, when the number of bands or CCs of the scheduled cells is less than or equal to a predetermined number, for example, when all scheduled cells are within the same TAG.

[0073] 4) When the unlicensed cell is a specific FR. For example, when the unlicensed cell is FR1. For example, when the unlicensed cell is FR2-2.

[0074] Furthermore, the ability to configure cells for scheduling unlicensed frequencies, the conditions for doing so, and the UE capabilities may differ between multi-carrier PDSCH scheduling and multi-carrier PUSCH scheduling.

[0075] For example, in single DCI multi-carrier PDSCH / PUSCH scheduling, the ability to configure each unlicensed frequency (frequency for shared spectrum channel access operation) cell as a scheduled cell may be defined as shown in Option 1) or Option 2). Terminal 20 may determine whether or not an unlicensed frequency cell can be configured as a scheduled cell based on this definition.

[0076] Option 1) Unlicensed cells may be specified as not being configurable as scheduled cells.

[0077] Option 2) Unlicensed cells may be configured as scheduled cells only if the scheduled cell meets certain conditions. Alternatively, unlicensed cells may be configured as scheduled cells only if they do not meet certain conditions. For example, the specific conditions may be that the scheduled cell is a licensed cell. For example, the specific conditions may be that the scheduled cell is a PCell, PSCell, or PUCCH-SCell. For example, the specific conditions may be that the scheduled cell is a cell of a specific frequency. For example, the specific conditions may be that the scheduled cell is a cell of a specific SCS.

[0078] Option 3) An unlicensed cell may be configurable as a scheduled cell only if certain conditions are met. Alternatively, an unlicensed cell may not be configurable as a scheduled cell only if certain conditions are not met. For example, the specific conditions may be that terminal 20 reports to the network as a UE capability whether an unlicensed cell can be configurable as a scheduled cell, and that UE capability allows the unlicensed cell to be configurable as a scheduled cell. For example, the specific conditions may be that the scheduled cell meets certain conditions. For example, that the scheduled cell is a specific cell. For example, that the scheduled cell is a cell of a specific frequency. For example, that the scheduled cell is a cell of a specific SCS. For example, that the SCS of the scheduled cell and the SCS of the scheduling cell have a specific relationship. For example, that the frequency of the scheduled cell and the frequency of the scheduling cell have a specific relationship.

[0079] Furthermore, the ability, conditions, and UE capabilities for setting unlicensed frequencies as scheduled cells may differ between multi-carrier PDSCH scheduling and multi-carrier PUSCH scheduling.

[0080] Furthermore, when the scheduled cells include at least one unlicensed frequency cell, the applicable or inapplicable multi-channel access methods for each unlicensed frequency cell may be specified. For example, this may be specified as in Option 1) or Option 2) below.

[0081] Option 1) For DL, any of Type A1, Type A2, Type B1, and Type B2 may be applicable. For UL, LBT may be performed independently in each unlicensed cell. If the scheduled cell includes multiple unlicensed cells, it may be required that the PDSCH or PUSCH transmission start timing (COT start timing) be synchronized.

[0082] Option 2) When configuring single DCI multi-carrier PDSCH scheduling, one or more of types A1, A2, B1, and B2 may be disabled.

[0083] Additionally, an enhanced Type 2 HARQ codebook (enhanced dynamic codebook) may be configured to specify the behavior when the candidates for scheduled cells include both unlicensed and licensed frequency cells.

[0084] For example, the inapplicable value (e.g., -1) for the PDSCH-to-HARQ feedback indicator may be defined as shown in 1)-3) below. Note that the PDSCH-to-HARQ feedback indicator for licensed frequencies and the PDSCH-to-HARQ feedback indicator for unlicensed frequencies may be notified separately.

[0085] 1) Not permitted for use. 2) Use may be permitted only if specific conditions are met. For example, it may be permitted only if the scheduled cell contains only unlicensed frequencies and all applicable bands support the "not applicable" value. 3) Depending on the UE's ability to support the "not applicable" value, it may be enabled.

[0086] Furthermore, the PDSCH group index may be defined as shown in 1)-3) below.

[0087] 1) DCI may only notify the PDSCH group index common to all PDSCHs (licensed and unlicensed cells). 2) Different PDSCH group indexes may be notified via DCI for unlicensed cells and licensed cells. 3) The PDSCH group index may be notified via DCI for each cell or for each group of cells that have been pre-grouped.

[0088] As described above, the base station 10 and terminal 20 can perform multi-carrier scheduling in the unlicensed frequency band, thereby reducing the scheduling and processing load.

[0089] In other words, multi-carrier scheduling can be performed in the unlicensed band.

[0090] (Device configuration) Next, we will describe an example of the functional configuration of the base station 10 and terminal 20 that perform the processes and operations described above. The base station 10 and terminal 20 include functions to implement the embodiments described above. However, the base station 10 and terminal 20 may each have only some of the functions in the embodiments.

[0091] <Base station 10> Figure 9 shows an example of the functional configuration of a base station 10 in an embodiment of the present invention. As shown in Figure 9, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Figure 9 is merely an example. The names of the functional categories and functional units can be anything as long as they can perform the operations according to the embodiment of the present invention.

[0092] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitting unit 110 also transmits inter-network node messages to other network nodes. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining information from the received signals, for example, higher layer information. The transmitting unit 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. The receiving unit 120 also receives inter-network node messages from other network nodes.

[0093] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20. The content of the setting information includes, for example, information related to multi-carrier scheduling.

[0094] The control unit 140 performs control related to multi-carrier scheduling, as described in the embodiment. The signal transmission function of the control unit 140 may be included in the transmission unit 110, and the signal reception function of the control unit 140 may be included in the reception unit 120.

[0095] <Terminal 20> Figure 10 shows an example of the functional configuration of a terminal 20 in an embodiment of the present invention. As shown in Figure 10, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 10 is merely an example. Any functional classification and functional unit names are acceptable as long as they can perform the operations according to the embodiment of the present invention.

[0096] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and acquires signals from higher layers from the received physical layer signals. The receiving unit 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. For example, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20 as D2D communication, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0097] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores pre-configured setting information. The content of the setting information includes, for example, information related to multi-carrier scheduling.

[0098] The control unit 240 performs control related to multi-carrier scheduling, as described in the embodiment. The signal transmission function in the control unit 240 may be included in the transmission unit 210, and the signal reception function in the control unit 240 may be included in the reception unit 220.

[0099] (Hardware configuration) The block diagrams (Figures 9 and 10) used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the one or more devices with software.

[0100] Functions include, but are not limited to, judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. As mentioned above, the method of implementation is not particularly limited.

[0101] For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 11 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 according to one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0102] In the following explanation, the term "device" can be read as "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0103] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and auxiliary storage device 1003.

[0104] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0105] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes a computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 9 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 10 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunications line.

[0106] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of this disclosure.

[0107] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0108] The communication device 1004 is hardware (transceiver / receiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may include high-frequency switches, duplexers, filters, frequency synthesizers, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmit / receive antenna, amplifier section, transmit / receive section, transmission path interface, etc., may be implemented by the communication device 1004. The transmit / receive section may be implemented with physically or logically separated transmitting and receiving sections.

[0109] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0110] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0111] Furthermore, the base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0112] Figure 12 shows an example of the configuration of vehicle 2001. As shown in Figure 12, vehicle 2001 comprises a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0113] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0114] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0115] Signals from various sensors 2021-2029 include current signals from current sensor 2021 which senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, front and rear wheel air pressure signals obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depression signals obtained by accelerator pedal sensor 2029, brake pedal depression signals obtained by brake pedal sensor 2026, shift lever operation signals obtained by shift lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0116] The Information Services Unit 2012 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001. The Information Services Unit 2012 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0117] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0118] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0119] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0120] The communication module 2013 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 2012. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above input.

[0121] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit, which outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., provided in the vehicle 2001.

[0122] (Summary of the embodiments) As described above, according to an embodiment of the present invention, a terminal is provided which includes a control unit that assumes a scheduling cell and a scheduled cell in multi-carrier scheduling using a single control information, and a receiving unit that receives the single control information from the scheduling cell, wherein the receiving unit receives a plurality of scheduled cells based on the single control information, and the control unit determines whether or not an unlicensed frequency cell can be set as the scheduling cell.

[0123] With the above configuration, the base station 10 and terminal 20 can perform multi-carrier scheduling in the unlicensed frequency band, thereby reducing the scheduling and processing load. In other words, multi-carrier scheduling can be performed in the unlicensed band.

[0124] The control unit may determine that an unlicensed frequency cell cannot be set as a cell to be scheduled. With this configuration, the base station 10 and the terminal 20 can stably perform multi-carrier scheduling in the unlicensed frequency band and reduce the scheduling and processing load.

[0125] The control unit may determine that an unlicensed frequency cell can be set as a scheduling cell if it satisfies certain conditions. With this configuration, the base station 10 and the terminal 20 can stably perform multi-carrier scheduling in the unlicensed frequency band and reduce the scheduling and processing load.

[0126] The aforementioned specific condition may also be that the unlicensed frequency cell is a primary cell. With this configuration, the base station 10 and terminal 20 can stably perform multi-carrier scheduling in the unlicensed frequency band and reduce the scheduling and processing load.

[0127] Furthermore, according to an embodiment of the present invention, a base station is provided which includes a control unit that assumes a scheduling cell and a scheduled cell in multi-carrier scheduling using a single control information, and a transmission unit that transmits the single control information from the scheduling cell, wherein the transmission unit transmits a plurality of the scheduled cells based on the single control information, and the control unit determines whether or not an unlicensed frequency cell can be set as the scheduling cell.

[0128] With the above configuration, the base station 10 and terminal 20 can perform multi-carrier scheduling in the unlicensed frequency band, thereby reducing the scheduling and processing load. In other words, multi-carrier scheduling can be performed in the unlicensed band.

[0129] Furthermore, according to an embodiment of the present invention, a communication method is provided in which a terminal performs the following steps: a control procedure that assumes a scheduling cell and a scheduled cell in multi-carrier scheduling using a single control information; a reception procedure that receives the single control information from the scheduling cell; a procedure that receives a plurality of scheduled cells based on the single control information; and a procedure that determines whether an unlicensed frequency cell can be set as the scheduling cell.

[0130] With the above configuration, the base station 10 and terminal 20 can perform multi-carrier scheduling in the unlicensed frequency band, thereby reducing the scheduling and processing load. In other words, multi-carrier scheduling can be performed in the unlicensed band.

[0131] (Supplement to the embodiment) While embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as it does not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0132] Furthermore, the notification of information is not limited to the embodiments / models described herein and may be carried out by other methods. For example, the notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0133] Each aspect / embodiment described in this disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (where x is, for example, an integer or decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), and IEEE This may apply to at least one system utilizing 802.20, UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. It may also apply to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G).

[0134] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0135] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0136] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0137] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0138] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0139] Software should be broadly interpreted to mean 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, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0140] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0141] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0142] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0143] The terms “system” and “network” as used in this disclosure are interchangeable.

[0144] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0145] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0146] In this disclosure, terms such as "base station (BS)", "wireless base station", "base station equipment", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0147] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0148] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform information-based control or operation.

[0149] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0150] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless 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 several other appropriate terms.

[0151] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to a movable object, and its speed of movement is arbitrary. This also includes the case when the mobile body is stationary. The mobile body includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and items mounted on them. The mobile body may also be a mobile body that moves autonomously based on operation commands. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include devices that do not necessarily move during communication operations. 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.

[0152] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0153] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0154] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0155] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0156] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0157] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0158] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0159] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0160] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0161] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe. A subframe may further consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0162] Numerical logic may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerical logic may include, for example, 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 configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0163] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a time unit based on neurology.

[0164] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0165] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0166] For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0167] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each terminal 20 to allocate wireless resources (such as the frequency bandwidth and transmission power available to each terminal 20) in TTI units. However, the definition of TTI is not limited to this.

[0168] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0169] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0170] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0171] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0172] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0173] Furthermore, the time domain of the RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. Each TTI, subframe, etc., may consist of one or more resource blocks.

[0174] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0175] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0176] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a particular neurology system in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. A Bandwidth Part (PRB) may be defined and numbered within a given BWP.

[0177] A BWP may include BWPs for UL (UL BWP) and BWPs for DL ​​(DL BWP). One or more BWPs may be configured within a single carrier for a UE.

[0178] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0179] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0180] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0181] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0182] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0183] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way. [Explanation of symbols]

[0184] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 devices 210 Transmitter 220 Receiver 230 Setting section 240 Control Unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive Unit 2003 Steering Department 2004 Accelerator pedal 2005 Brake pedal 2006 Shift Lever 2007 Front Wheel 2008 Rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 Rotation speed sensor 2023 Pneumatic Sensor 2024 Vehicle Speed ​​Sensor 2025 Accelerometer 2026 Brake Pedal Sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driver Support Systems Department 2031 Microprocessor 2032 memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. In multi-carrier scheduling using a single control information for scheduling a physical uplink shared channel or a physical downlink shared channel, a control unit sets capability information regarding whether an unlicensed cell can be set as a scheduling cell, based on whether the cell scheduled by the scheduling cell is an unlicensed cell, A transmitting unit that transmits the aforementioned capability information to a base station, In the aforementioned scheduling cell, a receiving unit receives the single control information, A terminal.

2. The control unit sets the capability information individually with respect to scheduling the physical uplink sharing channel and the physical downlink sharing channel. The terminal according to claim 1.

3. The control unit sets the capability information based on the Frequency Range (FR) of the cells scheduled by the scheduling cell. The terminal according to claim 1.

4. The control unit sets the capability information based on whether the subcarrier interval of the scheduling cell and the cell scheduled by the scheduling cell are the same. The terminal according to claim 1.

5. In multi-carrier scheduling using a single control information for scheduling a physical uplink shared channel or a physical downlink shared channel, a receiving unit receives capability information from a terminal that is set based on whether or not an unlicensed cell is an unlicensed cell, regarding whether or not an unlicensed cell can be set as a scheduling cell, A control unit that determines whether its own device corresponds to the scheduled cell based on the capability information, When the device is set as the scheduling cell, the transmitting unit transmits the single control information to the terminal, A base station having

6. In multi-carrier scheduling using a single control information for scheduling a physical uplink shared channel or a physical downlink shared channel, a control unit sets capability information regarding whether an unlicensed cell can be set as a scheduling cell, based on whether the cell scheduled by the scheduling cell is an unlicensed cell, A transmitting unit that transmits the aforementioned capability information to a base station, In the aforementioned scheduling cell, a receiving unit receives the single control information, A terminal having, A receiving unit that receives the aforementioned capability information from the terminal, A control unit that determines whether its own device corresponds to the scheduled cell based on the capability information, When the device is set as the scheduling cell, the transmitting unit transmits the single control information to the terminal, A base station having, A communication system having

7. In multi-carrier scheduling using a single control information for scheduling a physical uplink shared channel or a physical downlink shared channel, the step of setting capability information regarding whether an unlicensed cell can be set as a scheduling cell based on whether the cell scheduled by the scheduling cell is an unlicensed cell, The steps include: transmitting the aforementioned capability information to the base station, The step of receiving the single control information in the scheduling cell, A communication method performed by a terminal having [a certain feature / ability].

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