Terminal, wireless communication method, base station, and system

Abstract

A terminal according to an embodiment of the present disclosure includes a reception unit that receives a minimum information block (MIB) within a synchronization signal block, and a control unit that decides a control resource set (CORESET) 0 based on setting information associated with an index within the MIB in a set of setting information for controlling the CORESET 0, at least one value of the set, the index, and frequency resources of the CORESET 0 being different from a value for a second terminal having a minimum channel bandwidth wider than a minimum channel bandwidth of the terminal. According to an embodiment of the present disclosure, even when requirements for a terminal are relaxed, initial access can be appropriately performed.

Description

Technical Field

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

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

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

[0004] Existing technical documents

[0005] Non-patent literature

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

[0007] The problem that the invention aims to solve

[0008] In 3GPP Rel.15, the minimum bandwidth required for UE communication (e.g., mandatory bandwidth) is defined. On the other hand, the introduction of terminals corresponding to various use cases such as IoT is envisioned in future wireless communication systems (e.g., Rel.17 and later).

[0009] It is also considered that, depending on the use case, the requirements defined in Rel.15 (e.g., UE capabilities or terminal capabilities) may not be required. Therefore, it is also considered that the requirements may be relaxed depending on the use case, but how to control the setting of these requirements or the UE operation within these requirements has not been fully studied. In order to flexibly respond to the various use cases in future wireless communication systems, it is necessary to properly control these requirements or UE operation, etc.

[0010] However, the initial access procedure for terminals with relaxed requirements is unclear. If the initial access is not performed properly, there are concerns about low throughput and poor system performance.

[0011] Therefore, one of the purposes of this disclosure is to provide a terminal, wireless communication method, and base station that can properly perform initial access even when the requirements for the terminal are relaxed.

[0012] Methods for solving problems

[0013] One aspect of this disclosure relates to a terminal comprising: a receiving unit that receives a master information block (MIB) within a synchronization signal block; and a control unit that determines the frequency resources of CORESET0 based on setting information associated with an index within the MIB in a set of setting information for a control resource set (CORESET0), wherein the value of the set of setting information is set to a value different from the set of setting information for a second terminal via the same index, the second terminal having a minimum channel bandwidth wider than the minimum channel bandwidth of the first terminal.

[0014] Invention Effects

[0015] According to one method of this disclosure, initial access can be properly performed even when the requirements for the terminal are relaxed. Attached Figure Description

[0016] Figure 1A-1C This is a diagram illustrating an example of the multiplexing mode of SSB and CORESET0.

[0017] Figure 2 This is a diagram showing an example of the CORESET0 settings table.

[0018] Figure 3 This is a diagram representing an example of SSB and CORESET0.

[0019] Figure 4 This is a diagram illustrating an example of an existing table as described in Implementation 1-1.

[0020] Figure 5 This is a diagram illustrating an example of the new table involved in implementation method 1-1.

[0021] Figure 6 This is a diagram illustrating an example of CORESET0 according to embodiment 1-1.

[0022] Figure 7 This is a diagram illustrating an example of the new table involved in embodiments 1-2.

[0023] Figure 8 This is a diagram illustrating an example of CORESET0 as described in embodiments 1-2.

[0024] Figure 9 This is a diagram showing an example of the new table involved in Implementation Method 2.

[0025] Figure 10 This is a diagram illustrating an example of CORESET0 according to embodiment 3-1.

[0026] Figure 11A And 11B is a diagram showing an example of CORESET0 according to embodiment 3-2.

[0027] Figure 12 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0028] Figure 13 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0029] Figure 14 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0030] Figure 15 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. Detailed Implementation

[0031] <Use Case>

[0032] In future wireless communication systems (e.g., after 3GPP Rel.17), communication systems that will be introduced in NR (e.g., Rel.15) are envisioned for use cases such as IoT. As IoT use cases, in addition to conventional IoT use cases (e.g., smart homes, smart water, electricity meters, smart signals utilizing LTE terminals), applications for new use cases are also being studied.

[0033] As new use cases, these could include industrial wireless sensor NW (IWSN), video surveillance systems, wearable devices, and so on.

[0034] It is also envisioned that the conditions or capabilities required by the terminals applied to these use cases (e.g., terminal capabilities, UE capabilities, or required conditions) are reduced compared to the conditions or capabilities required by devices defined or supported in Rel.15 (e.g., also referred to as NR devices or NR terminals). Devices with reduced terminal capabilities compared to NR devices may also be referred to as reduced-capability NR devices, NR light devices, NR light terminals, NR light, NR light UEs, etc. In the following description, devices with reduced terminal capabilities compared to NR devices will be referred to as NR light devices, but may be replaced with other names.

[0035] NR lightweight devices can also be configured with fewer transmit and receive antennas than NR devices. Furthermore, compared to NR devices, the bandwidth used in communication can be set to be smaller or narrower (bandwidth reduction).

[0036] In Rel.15, UEs (NR devices, existing UEs) are required to support specific bandwidths based on frequency ranges (e.g., FR1, FR2) and subcarrier spacing. The bandwidth required for UE support can also be referred to as mandatory bandwidth, mandatory BW, or mandatory BW.

[0037] For example, in the first frequency range (FR1), the UE needs to support approximately 100 MHz of bandwidth for subcarrier spacings of 30 kHz and 60 kHz, and approximately 50 MHz of bandwidth for subcarrier spacing of 15 kHz. Furthermore, in the second frequency range (FR2), the UE needs to support approximately 200 MHz of bandwidth for subcarrier spacings of 60 kHz and 120 kHz.

[0038] On the other hand, it is considered that the bandwidth (e.g., forced bandwidth) supported by the NR lightweight device is set to be narrower than the bandwidth supported by the Rel.15 UE. In other words, the size of the bandwidth supported by the NR lightweight device can be reduced compared to the NR device. As a result, the load of signal reception or transmission processing in the NR lightweight device can be reduced.

[0039] The following is being studied in order to reduce the complexity of NR lightweight devices.

[0040] • Reduction in the number of antennas used for at least one of the UE's reception and transmission.

[0041] • Reduction of UE bandwidth. The synchronization signal (SS) / physical broadcast channel (PBCH) block (SSB) band of Rel.15 is reused, and changes to Layer 1 (L1) are minimized.

[0042] • Half duplex and frequency division duplex (FDD).

[0043] • Reduced UE processing time.

[0044] • Reduced UE processing capacity.

[0045] In addition, research is underway on: these features do not overlap with low power wide area (LPWA) use cases, have a minimum capability no lower than LTE Category 1bis modems, guarantee coexistence of Rel.15 and Rel.16 UEs, and focus on standalone mode as well as single and dual connectivity.

[0046] <Reuse Mode>

[0047] In Rel.15NR, multiplexing patterns 1 to 3 for SSB and control resource set (CORESET) 0 (zero) are specified. CORESET 0, CORESET for PDCCH used to schedule system information block (SIB) 1, CORESET for type 0-PDCCH common search space (CSS) set, and CORESET for remaining minimum system information (RMSI) can also be interchanged.

[0048] [Reuse Mode 1]

[0049] SSB and 0 are time-division multiplexed (TDM) Figure 1AIn other words, the time resources (periods) of SSB and CORESET0 do not overlap (SSB and CORESET0 are mapped to different times), but the frequency resources (band domains) of SSB and CORESET0 overlap.

[0050] For example, in narrow channel bandwidths, TDM is effective when Frequency Division Multiplexing (FDM) SSB and CORESET0 are not possible. In low frequency bands (e.g., below 1 or 6 GHz), where multiple beams can be transmitted at the same frequency and time via digital beamforming, FDM with the same beam is unnecessary.

[0051] [Reuse Mode 2]

[0052] SSB and CORESET0 are both TDM and FDM ( Figure 1B In other words, the time resources of SSB and CORESET0 do not overlap (SSB and CORESET0 are mapped to different times), and the frequency resources of SSB and CORESET0 do not overlap (SSB and CORESET0 are mapped to different frequencies).

[0053] For example, when the SSB SCS (Subcarrier Spacing (SCS) of the SSB) and the CORESET0 SCS (PDCCH SCS) are different, especially when the SSB SCS is wider than the RMSISCS, the time length (symbol length) of the SSB becomes shorter. Therefore, there are cases where it is impossible to perform SSB and FDM on both CORESET0 and PDSCH. In this case, it is possible to multiplex the SSB and CORESET0 using different time resources and different frequency resources.

[0054] Given the limitations of using analog beamforming, a base station can transmit only one beam. By performing SSB and FDM on the PDSCH transmitting SIB1, the base station can transmit a beam in a short time, thus suppressing the overhead of beam scanning.

[0055] [Reuse Mode 3]

[0056] SSB and CORESET0 are controlled by FDM ( Figure 1C In other words, the time resources of SSB and CORESET0 overlap, but their frequency resources do not overlap (SSB and CORESET0 are mapped to different frequencies).

[0057] For example, by performing SSB and FDM on both CORESET0 and PDSCH, the base station can transmit a beam in a short time. By switching the beam for each SSB, the base station can suppress the overhead of beam scanning.

[0058] <CORESET0>

[0059] In Rel.15NR, multiple CORESET0 configuration tables (multiple sets of CORESET0 configuration information) for CORESET0 settings are specified in the specification. Each table (a set of CORESET0 configuration information) contains multiple rows (multiple sets of CORESET0 configuration information). Figure 2 Each row contains the row index, SS / PBCH blocks, and the CORESET multiplexing mode, the number of resource blocks (RBs) in CORESET0, the number of symbols in CORESET0, and the offset of CORESET0 up to the minimum RB index of the SSB with respect to the minimum RB index (and the minimum RB index of the common RBs that overlap with the initial index of the SSB). Figure 3 At least one parameter (column) in ).

[0060] In this disclosure, the CORESET0 setting information set and the CORESET0 setting table can be interchanged. In this disclosure, the rows of the CORESET0 setting information and the CORESET0 setting table can also be interchanged.

[0061] Multiple CORESET0 configuration tables are associated with at least one of the SSB SCS, PDCCH (CORESET0) SCS, and (SSB) frequency band. The frequency band can also be associated with the minimum channel bandwidth. The UE can also select from multiple CORESET0 configuration tables to associate with at least one of the SSB SCS, PDCCH SCS, and frequency band.

[0062] The minimum information block (MIB) transmitted via PBCH within the SSB contains the SIB1 PDCCH configuration information (pdcch-ConfigSIB1) for the PDCCH settings used by SIB1. The SIB1 PDCCH configuration information includes the CORESET0 configuration index (controlResourceSetZero) for CORESET0 settings and the searchspace0 configuration index (searchSpaceZero) for the type 0 PDCCH CSS set (searchspace0). The CORESET0 configuration index corresponds to the row index of the CORESET0 configuration table (e.g., one of 0, 1, ..., 15).

[0063] The UE determines CORESET0 from the row of the index shown by the CORESET0 setting index in the determined CORESET0 setting table.

[0064] In Rel.15, the bandwidth of CORESET0 is not limited to the bandwidth of the SSB. Due to bandwidth reduction, there is a possibility that new UEs may not be able to receive signals with a bandwidth wider than that of the SSB. When CORESET0 is set via the CORESET0 setting index in the PDCCH setting information of SIB1 contained in the MIB, it is necessary to ensure the coexistence of Rel.15 UEs, Rel.16 UEs (existing UEs), and NR light equipment (new UEs).

[0065] Therefore, the inventors of this invention conceived of appropriately setting CORESET0 for a new UE.

[0066] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0067] In this disclosure, CORESET0, CORESET with index 0, DCI with CRC scrambled by SI-RNTI and with a system information indicator set to 0, PDCCH for scheduling SIB1, CORESET associated with SSB, PDCCH within CORESET0, Type0-PDCCH, RMSI CORESET, and RMSIPDCCH can also be interchanged.

[0068] (Wireless communication method)

[0069] In this disclosure, the existing CORESET0 setting table, the existing table, and the CORESET0 setting tables of Rel.15 and Rel.16 can be interchanged with each other. In this disclosure, the new CORESET0 setting table, the new table, and the CORESET0 setting tables of Rel.17 and later can also be interchanged with each other.

[0070] In this disclosure, minimum bandwidth, minimum channel bandwidth, minimum UE channel bandwidth, forced bandwidth, and forced BW can also be interchanged.

[0071] In this disclosure, the existing UE, the UE with a minimum channel bandwidth wider than the new UE, the second terminal, and the NR device can also be replaced by each other. In this disclosure, the new UE, the UE with a minimum channel bandwidth narrower than the existing UE, the first terminal, the reduced capability NR device, the NR light device, the NR light terminal, the NR light, the NR light UE, and the NR light UE can also be replaced by each other.

[0072] It can also be imported into different types or categories of UEs with enhanced capabilities. Different types or categories of UEs with enhanced capabilities can also have different capabilities depending on the supported bandwidth used for CORESET0.

[0073] At least one value in the CORESET0 setting table for the new UE, the CORESET0 setting index notified to the new UE, and the frequency resources (e.g., bandwidth, RB index) of the CORESET0 for the new UE may also be different from the value (specific value) used for the existing UE.

[0074] The CORESET0 used by the new UE can also be different from the CORESET0 used by the existing UE.

[0075] <Implementation Method 1>

[0076] By using the CORESET0 setting index in the PDCCH setting information of SIB1 contained in the MIB, different CORESET0 settings can be set for existing UEs and new UEs.

[0077] Alternatively, one of the following implementation methods 1-1 and 1-2 can be used to determine CORESET0.

[0078] Implementation Method 1-1

[0079] Different CORESET0 configuration tables can also be used between existing UEs and new UEs.

[0080] Existing UEs can also use the existing table (Table #1). New UEs can also use the new table (Table #2). The value of at least one parameter (row) associated with the CORESET0 setting index in the new table can also be different from the value of at least one parameter (row) associated with the index in the existing table.

[0081] Figure 4 This is a diagram illustrating an example of an existing table as described in Implementation 1-1. Figure 5This diagram illustrates an example of the new table involved in implementation method 1-1. When CORESET0 is set to index representation 3, the multiplexing mode, number of RBs, and offset of CORESET0 used by the new UE are different from those used by the existing UE. For example, when CORESET0 is set to index representation 3, based on... Figure 4 The existing table of existing UEs using the CORESET0 multiplexing mode is as follows: Figure 6 The value shown is 1. For example, when CORESET0 is set to represent index 3, based on... Figure 5 The new UE uses the CORESET0 multiplexing mode in the new form, such as Figure 6 As shown in Figure 2, the CORESET0 used by the new UE is mapped to a different frequency than the CORESET0 of the existing UE.

[0082] The bandwidth (number of RBs) of CORESET0 used by the new UE can also be less than the bandwidth (number of RBs, for example, 20 RBs) of SSB.

[0083] Implementation Methods 1-2

[0084] The same CORESET0 configuration table can be used between existing UEs and new UEs.

[0085] Existing UEs and new UEs can also use a new form (Form #1a) that contains information from existing forms. The value of the CORESET0 setting index that is notified (set) for a new UE can also be different from the value of the CORESET0 setting index that is notified (set) for an existing UE.

[0086] Existing UEs and new UEs can also use new tables that contain rows from existing tables. Figure 7 This diagram illustrates an example of the new table involved in embodiments 1-2. In the new table, the rows corresponding to the indices of values ​​other than reserved values ​​(e.g., any one of 0, 1, ..., 14) can also be the same as in the existing tables. In the new table, the valid values ​​of the parameters can also be specified for the rows corresponding to the indices of reserved values ​​(e.g., 15) in the existing tables.

[0087] The CORESET0 setting index notified to an existing UE can also be a value other than a reserved value (e.g., any one of 0, 1, ..., 14). The CORESET0 setting index notified to a new UE can also be a reserved value (e.g., 15).

[0088] For example, when CORESET0 is set to index 15, based on Figure 7 The new table CORESET0 is as follows Figure 8The bandwidth shown is narrower than that of the existing CORESET0 used by UE.

[0089] The bandwidth (number of RBs) of CORESET0 used by the new UE can also be less than the bandwidth (number of RBs, for example, 20 RBs) of SSB.

[0090] The interpretation of parameters in the new table by the new UE may differ from that of the existing UE. For example, the new UE may set the bandwidth (number of RBs) of CORESET0 to be lower than the bandwidth (number of RBs, e.g., 20 RBs) of SSB, independent of the parameters in the new table. For example, the new UE may use "offset - number of RBs" as the new offset. For example, the new UE may use "max{2, number of symbols}" as the new number of symbols.

[0091] The reserved values ​​of the index can also be notified to new UEs without expecting existing UEs to exist in the network.

[0092] According to this implementation method 1, it is possible to set an appropriate CORESET0 for a new UE without affecting the operation of the existing UE.

[0093] <Implementation Method 2>

[0094] When notified via 1 bit in the MIB, the UE can also use the new table for CORESET0 settings.

[0095] The idle bits within the MIB can also represent the CORESET0 configuration table. For example, with an idle bit of 0, an existing UE can use table #1 while a new UE can use table #2. A UE can also use table #1 with an idle bit of 0. A UE can also use a new table (table #3) with an idle bit of 1.

[0096] Figure 9 This is a diagram illustrating an example of the new table (Table #3) involved in Implementation Method 2. For example, when CORESET0 is set to index 6, CORESET0 and the aforementioned... Figure 8 It's the same.

[0097] According to this implementation method 2, it is possible to set an appropriate CORESET0 for a new UE without affecting the operation of existing UEs. Furthermore, a more flexible CORESET0 can be implemented without expecting existing UEs to exist in the network.

[0098] <Implementation Method 3>

[0099] Existing UEs and new UEs can also use the same CORESET0 configuration table (existing table or new table).

[0100] Implementation Method 3-1

[0101] Existing UEs and new UEs can use the same CORESET0. Existing UEs and new UEs can also use the same interpretation for the frequency domain resources of CORESET0 in the CORESET0 setting table. For example, the frequency domain resources can also be the number of RBs.

[0102] The minimum bandwidth of a new UE can also be 24 RB. Supporting a 24 RB bandwidth with a new UE can also be mandatory. The same CORESET0 can also be used with both existing and new UEs. For example, existing and new UEs can also use... Figure 10 The CORESET0 shown.

[0103] If the network supports both existing UEs and new UEs, or if the network does not support existing UEs but supports new UEs, the bandwidth of CORESET0 can also be based on the bandwidth supported by the new UE.

[0104] The new UE can also follow either of the following steps 1 or 2.

[0105] [Operation 1]

[0106] If the bandwidth of CORESET0 in a cell exceeds the capacity of some new UEs, these new UEs may not be allowed to access the cell (access control). Otherwise, these new UEs may be allowed to access the cell.

[0107] [Operation 2]

[0108] The new UE may also not be intended to be configured with a bandwidth exceeding its capacity for CORESET0.

[0109] According to this implementation method 3-1, the operation of the UE can be simplified.

[0110] Implementation Method 3-2

[0111] Existing UEs and new UEs can also use different interpretations for the frequency domain resources of CORESET0 in the CORESET0 setting table. For example, the frequency domain resources can also be the number of RBs.

[0112] The configuration and monitoring of CORESET0 for existing UEs can be the same as in Rel.15. The frequency domain resource assignment field can also be sent via DCI format 1_0 with cyclic redundancy check (CRC) scrambled by the system information (SI)-radio network temporary identifier (RNTI). The frequency domain resource assignment field can also be ceil(log2(N) RB DL,BWP (N RB DL,BWP +1) / 2)) bits. N RB DL,BWP It can also be the size of CORESET0 (number of RBs).

[0113] The bandwidth of CORESET0 used by the new UE can be fixed at 18, 20, or 24 RB, or it can be the bandwidth of SSB.

[0114] For a certain CORESET0 setting table, the CORESET0 used by a new UE based on a certain CORESET0 setting index (row) can also be a part of the CORESET0 of an existing UE based on that CORESET0 setting index (row).

[0115] The frequency position of CORESET0 used by the new UE can also be any of the following frequency positions 1 to 3.

[0116] [Frequency Position 1]

[0117] The minimum (starting) RB index of CORESET0 used by the new UE can also be the same as the minimum RB index of CORESET used by the existing UE. For example, Figure 11A As shown, the existing UE uses the 96 RB CORESET0 set by the existing UE that was notified via the CORESET0 setting index. The new UE interprets the 20 RBs from the minimum RB index as the CORESET0 set by the new UE. At least one of the multiplexing mode and the number of symbols can be the same between the CORESET0 set by the existing UE and the CORESET0 set by the new UE.

[0118] [Frequency Position 2]

[0119] The maximum (end) RB index of CORESET0 used by the new UE can also be the same as the maximum RB index of CORESET0 used by the existing UE.

[0120] [Frequency Position 3]

[0121] The minimum (starting) RB index of CORESET0 used by the new UE can also be the same as the minimum RB index of the SSB (the minimum RB index of the common RB that overlaps with the initial index of the SSB). For example, as Figure 11B As shown, the existing UE uses the 96RB CORESET0 set by the existing UE that was notified via the CORESET0 setting index. The new UE interprets the 20RB from the minimum RB index from the SSB as the CORESET0 set by the new UE. At least one of the multiplexing mode and the number of symbols can be the same between the CORESET0 set by the existing UE and the CORESET0 set by the new UE.

[0122] The network can also use the CORESET0 of the PRB that the new UE can utilize to send PDCCH.

[0123] The DCI used by existing UEs and the DCI used by new UEs can also be distinguished. To distinguish them, either DCI1 or DCI2 below can be used.

[0124] [DCI1]

[0125] The frequency domain resource allocation field can also be transmitted using DCI format 1_0 with CRC scrambling by SI-RNTI. The frequency domain resource allocation field can also be ceil(log2(N) RB DL,BWP (N RB DL,BWP +1) / 2)) bits. N RB DL,BWP It can also be the size (number of RBs) of CORESET0 used by the new UE. The size of CORESET0 used by the new UE can also be 18, 20 or 24 RBs.

[0126] The size of the frequency domain resource allocation field can also differ between existing and new UEs. Similarly, the size of the DCI format 1_0 scrambled by SI-RNTI with CRC can also differ between existing and new UEs.

[0127] The PDCCH used by existing UEs and the PDCCH used by new UEs can also be distinguished by their different DCI sizes.

[0128] [DCI2]

[0129] The SI-RNTI used by the new UE for scheduling system information in DCI format 1_0 can be different from the SI-RNTI used by the existing UE, and can also be different from other RNTIs. The SI-RNTI used by the existing UE can also be FFFF. The SI-RNTI used by the new UE can also be one of the reserved values ​​(FFF0 to FFFD).

[0130] The PDCCH used by existing UEs and the PDCCH used by new UEs can also be distinguished by different SI-RNTIs.

[0131] According to this implementation method 3-2, it is possible to prevent the bandwidth of CORESET0 and the PDSCH scheduled by it from being limited by the bandwidth supported by the new UE.

[0132] According to this implementation method 3, in cases where existing UEs coexist in the same cell are present or not, it is easy to support different types or categories of UEs with reduced capabilities.

[0133] (Wireless Communication System)

[0134] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. In this wireless communication system, communication is performed using one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0135] Figure 12 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP).

[0136] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0137] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0138] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., dual connectivity between NR-NR Dual Connectivity (NN-DC) between MN and SN base stations (gNB) where both are NR).

[0139] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0140] User terminal 20 (e.g., NR light device) can also connect to at least one of the multiple base stations 10. User terminal 20 can also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0141] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). Furthermore, the frequency bands and definitions of FR1 and FR2 are not limited to these; for example, FR1 can also correspond to a frequency band higher than FR2.

[0142] In addition, user terminal 20 can also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) to communicate in each CC.

[0143] Multiple base stations 10 can also be connected via wired (e.g., fiber optic, X2 interface, etc., conforming to the Common Public Radio Interface (CPRI)) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as backhaul, base station 11, which is equivalent to the host station, can also be referred to as the Integrated Access Backhaul (IAB) host, and base station 12, which is equivalent to the relay station, can also be referred to as the IAB node.

[0144] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may also include at least one of, for example, Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC).

[0145] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0146] In wireless communication system 1, a wireless access method based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, the following methods can be used: Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc.

[0147] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used for the wireless access methods of UL and DL.

[0148] In the wireless communication system 1, the downlink channel can also be a shared downlink channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), or a downlink control channel (Physical Downlink Control Channel (PDCCH)) shared by each user terminal 20.

[0149] Furthermore, in the wireless communication system 1, the uplink channel can also be an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)) or a random access channel (Physical Random Access Channel (PRACH)) or the like.

[0150] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. In addition, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0151] Lower-layer control information can also be transmitted via PDCCH. Lower-layer control information may also include, for example, downlink control information (DCI) containing scheduling information of at least one of PDSCH and PUSCH.

[0152] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can be replaced with DL data, and PUSCH can be replaced with UL data.

[0153] In PDCCH detection, a Control Resource Set (CORESET) and a search space can be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0154] A search space can also correspond to one or more PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces can also be called a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" used in this disclosure can be used interchangeably.

[0155] Uplink control information (UCI) including at least one of Channel State Information (CSI), delivery confirmation information (such as Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR) can also be transmitted via PUCCH. Random access preambles used for establishing a connection with the cell can also be transmitted via PRACH.

[0156] Furthermore, in this disclosure, downlink, uplink, etc., can be represented without the prefix "link". Additionally, the prefix "physical" can be omitted from the beginning of various channels.

[0157] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. In wireless communication system 1, as DL-RS, cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), and phase tracking reference signals (PTRS) can also be transmitted.

[0158] Synchronization signals can be at least one of, for example, the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS Block (SSB), etc. Additionally, SS, SSB, etc., can also be called reference signals.

[0159] Furthermore, in wireless communication system 1, measurement reference signals (SRS) and demodulation reference signals (DMRS) can also be transmitted as uplink reference signals (UL-RS). Additionally, DMRS can also be referred to as user terminal-specific reference signals (UE-specific Reference Signals).

[0160] (Base station)

[0161] Figure 13 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission line interface 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission line interface 140 may each be provided in more than one form.

[0162] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the base station 10 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0163] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0164] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., for signal transmission and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0165] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 can be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0166] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0167] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0168] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0169] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of the transmitting beam and the receiving beam.

[0170] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), and Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110 to generate the bit string to be transmitted.

[0171] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform transmission processing on the bit string to be transmitted, such as channel coding (which may also include error correction coding), modulation, mapping, filter processing, Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-to-analog conversion, etc., to output the baseband signal.

[0172] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0173] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the signals of the wireless frequency band received by the transmitting and receiving antenna 130 into the baseband signal.

[0174] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data, etc.

[0175] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 110.

[0176] The transmission path interface 140 can also send and receive signals (backhaul signaling) between devices included in the core network 30 and other base stations 10, and acquire and transmit user data (user plane data), control plane data, etc. for user terminal 20.

[0177] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of the transmitting and receiving unit 120, the transmitting and receiving antenna 130 and the transmission path interface 140.

[0178] The transmitting / receiving unit 120 can also transmit the minimum information block (MIB) within the synchronization signal block. The control unit 110 can also determine CORESET0 based on setting information associated with an index (e.g., the CORESET0 setting index) within the set of setting information for controlling resource set (CORESET)0 (CORESET0 setting table). At least one value of the set and the index can also differ from the value of a second terminal that is greater than the minimum channel bandwidth of the terminal.

[0179] (User terminal)

[0180] Figure 14This diagram illustrates an example of the structure of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Alternatively, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided as one or more.

[0181] Furthermore, in this example, the functional blocks that mainly represent the characteristic parts of this embodiment are shown. The user terminal 20 can also be conceived to have other functional blocks required for wireless communication. Some of the processing of each unit described below can also be omitted.

[0182] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0183] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0184] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0185] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0186] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0187] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0188] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0189] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on data and control information obtained from the control unit 210, and generate a bit string to be transmitted.

[0190] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, in order to output the baseband signal.

[0191] Furthermore, whether or not to apply DFT processing can also be based on the setting of transform precoding. If transform precoding for a certain channel (e.g., PUSCH) is enabled, the transmit / receive unit 220 (transmit processing unit 2211) may perform DFT processing as the aforementioned transmission processing in order to transmit the channel using DFT-s-OFDM waveforms; otherwise, it may not perform DFT processing as the aforementioned transmission processing.

[0192] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0193] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, and demodulate the signals of the wireless frequency band received by the transmitting and receiving antenna 230 into the baseband signal.

[0194] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to obtain user data.

[0195] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 210.

[0196] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0197] The transmitting / receiving unit 220 can also receive the minimum information block (MIB) within the synchronization signal block. The control unit 210 can also determine CORESET0 based on setting information associated with an index (e.g., the CORESET0 setting index) within the set of setting information for controlling resource set (CORESET)0 (CORESET0 setting table). The value of at least one of the set and the index can also differ from the value used for a second terminal having a minimum channel bandwidth wider than that of the terminal.

[0198] The CORESET0 may also be different from the CORESET0 used for the second terminal.

[0199] The set may also be one of two sets of setting information corresponding to the subcarrier spacing of the synchronization signal block, the subcarrier spacing of the CORESET0, and at least one of the frequency bands, associated with the value of the bit in the MIB.

[0200] The CORESET0 may also be a part of the CORESET0 for the second terminal based on the setting information.

[0201] (Hardware Structure)

[0202] Furthermore, the block diagrams used in the description of the above embodiments represent functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single physically or logically combined device, or by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices, and implementing it using multiple devices. Functional blocks can also be implemented by combining software within the aforementioned single device or multiple devices.

[0203] Here, the functions include judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that performs the sending function can also be called a transmitting unit or a transmitter. As mentioned above, the implementation method is not particularly limited.

[0204] For example, the base station, user terminal, etc. in one embodiment of this disclosure can also function as a computer for processing the wireless communication method of this disclosure. Figure 15 This diagram illustrates an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0205] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include some of the apparatuses.

[0206] For example, only one processor 1001 is illustrated, but there can be multiple processors. Furthermore, processing can be executed by one processor, or by two or more processors simultaneously, sequentially, or using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0207] The functions of the base station 10 and the user terminal 20 are implemented, for example, by causing specific software (programs) to be read into the hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations, controls communication via the communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage device 1003.

[0208] The processor 1001 controls the computer as a whole by operating the operating system, for example. The processor 1001 may also be configured as a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a part of the control unit 110 (210), the transmit / receive unit 120 (220), etc. described above may also be implemented by the processor 1001.

[0209] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program is used that causes the computer to perform at least a portion of the operations described in the above embodiments. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and similar implementations can be made for other functional blocks.

[0210] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of read-only memory (ROM), erasable programmable ROM (EPROM), electrically EPROM (EEPROM), random access memory (RAM), and other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0211] Storage 1003 is a computer-readable recording medium, and may also consist of at least one of the following: floppy disk, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM, etc.), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory (e.g., card, stick, key drive), magnetic stripe, database, server, and other suitable storage media. Storage 1003 may also be referred to as an auxiliary storage device.

[0212] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. The communication device 1004 may, for example, be configured to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD) and includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. For example, the aforementioned transmitting and receiving unit 120 (220) and transmitting and receiving antenna 130 (230) may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented such that the transmitting unit 120a (220a) and the receiving unit 120b (220b) are physically or logically separated.

[0213] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED light, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch panel).

[0214] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communication of information. The bus 1007 can be configured using a single bus or different buses between each device.

[0215] Furthermore, the base station 10 and the user terminal 20 can also be configured with hardware including 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 can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0216] (Modified Example)

[0217] Furthermore, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Additionally, a signal may also be a message. A reference signal may also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0218] A radio frame can also consist of one or more periods (frames) in the time domain. Each of these periods (frames) that constitutes a radio frame can also be called a subframe. Furthermore, a subframe can also consist of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0219] Here, the parameter set (numerology) can also be communication parameters applied to at least one of the transmitting and receiving parties of a signal or channel. For example, the parameter set (numerology) can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0220] A time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Furthermore, a time slot can also be a time unit based on a set of parameters.

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

[0222] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also use other names corresponding to them. Furthermore, the time units of frames, subframes, time slots, mini-time slots, and symbols in this disclosure can be used interchangeably.

[0223] For example, a single subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a single time slot or a single mini-time slot can also be called a TTI. That is to say, at least one of a subframe or a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Furthermore, the unit representing a TTI can also be called a time slot, mini-time slot, etc., instead of a subframe.

[0224] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (bandwidth, transmit power, etc. available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0225] TTI can be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., or it can be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) of the transmission blocks, code blocks, codewords, etc., that are mapped can be shorter than that TTI.

[0226] Furthermore, while one time slot or one mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0227] A Time Interval (TTI) with a duration of 1 ms can also be called a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI can also be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0228] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1 ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of less than long TTIs but more than 1 ms.

[0229] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the number of parameters, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the number of parameters.

[0230] In addition, RBs can also contain one or more symbols in the time domain, and can be the length of one time slot, one mini-time slot, one subframe, or one TTI. One TTI, one subframe, etc., can also be composed of one or more resource blocks.

[0231] In addition, one or more RBs can also be referred to as Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0232] In addition, a resource block can also consist of one or more resource elements (REs). For example, one RE can also be a radio resource area consisting of one subcarrier and one symbol.

[0233] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set (numerology) in a certain carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined by a BWP and appended with a sequence number within that BWP.

[0234] A BWP can also include a UL BWP (BWP used by UL) and a DL BWP (BWP used by DL). For a UE, one or more BWPs can be set within a single carrier.

[0235] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Additionally, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0236] Furthermore, the above-described constructions of radio frames, subframes, time slots, mini-time slots, and symbols are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc., can be varied in many ways.

[0237] Furthermore, the information, parameters, etc., described in this disclosure can be represented using absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0238] The names used for parameters, etc., in this disclosure are not limiting names at any point. Furthermore, the formulas, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, therefore the various names assigned to these various channels and information elements are not limiting names at any point.

[0239] The information, signals, etc., described in this disclosure can also be represented using one of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which can be mentioned throughout the foregoing description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0240] Furthermore, information and signals can be output from higher layers (upper level) to lower layers (lower level), and from lower layers to higher layers, at least in one of these directions. Information and signals can also be input and output via multiple network nodes.

[0241] Input and output information and signals can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals can be overwritten, updated, or recorded. Output information and signals can also be deleted. Input information and signals can also be sent to other devices.

[0242] The notification of information is not limited to the methods / implementations described in this disclosure, and other methods may also be used. For example, the notification of information in this disclosure may also be implemented through physical layer signaling (e.g., Downlink Control Information (DCI)), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB) etc.), Medium Access Control (MAC) signaling), other signals, or combinations thereof.

[0243] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC connection setup messages, RRC connection reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, the MAC control element (CE).

[0244] Furthermore, notification of specific information (e.g., a notification that “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information or by providing other information).

[0245] The determination can be made by a value represented by 1 bit (0 or 1), by a true or false value (boolean), or by a comparison of values ​​(e.g., by comparison with a specific value).

[0246] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0247] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, optical fiber, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0248] The terms “system” and “network” as used in this disclosure are used interchangeably. “Network” may also mean devices included in a network (e.g., base stations).

[0249] In this disclosure, the terms "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "transmission configuration indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beamwidth", "beam angle", "antenna", "antenna element", and "panel" are used interchangeably.

[0250] In this disclosure, the terms "Base Station (BS)", "Wireless Base Station", "Base Station Equipment", "Fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access Point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Panel", "Cell", "Sector", "Cell Group", "Carrier", and "Component Carrier" are used interchangeably. Base stations are also sometimes referred to as macrocells, small cells, femtocells, picocells, etc.

[0251] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​the base station providing communication services within that coverage area, or at least one of the base station subsystems.

[0252] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0253] Mobile stations are also sometimes referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or some other appropriate terms.

[0254] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Furthermore, at least one of the base station and the mobile station can also be a device mounted on a mobile body, or the mobile body itself. This mobile body can be a vehicle (e.g., a car, an airplane, etc.), a mobile body moving unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Additionally, at least one of the base station and the mobile station may include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0255] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, the various methods / implementations of this disclosure can be applied to a structure where the communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, the user terminal 20 can also be configured to have the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, uplink channel, downlink channel, etc., can also be replaced with side channel.

[0256] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, the base station 10 can also be configured to have the functions of the user terminal 20 described above.

[0257] In this disclosure, operations purported to be performed by the base station may sometimes be performed by its upper node, depending on the circumstances. In a network containing one or more network nodes having a base station, various operations for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (e.g., considering (Mobility Management Entity (MME)), Serving-Gateway (S-GW) etc., but not limited to) or combinations thereof.

[0258] The various methods / implementations described in this disclosure can be used individually, in combination, or switched during execution. Furthermore, the processing procedures, timing sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as there are no contradictions. For example, for the methods described in this disclosure, various steps are indicated using an illustrative order, and the order is not limited to the specific order indicated.

[0259] The various methods / implementations described in this disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Futuregeneration radio access (FX), Global System for Mobile Communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra-Wide Band (UWB), Bluetooth (Bluetooth (registered trademark)), systems utilizing other appropriate systems, and next-generation systems derived from them. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0260] Unless otherwise expressly stated, the use of the word "based on" in this disclosure does not imply "based on only". In other words, the use of the word "based on" implies both "based on only" and "based on at least".

[0261] Any reference to elements using terms such as "first," "second," etc., as used in this disclosure is not intended to definitively limit the quantity or order of these elements. These designations are used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, references to "first" and "second" elements do not imply that only two elements can be used, or that in some form the first element must precede the second element.

[0262] The term "determining" as used in this disclosure sometimes encompasses a wide variety of operations. For example, "determining" can also be considered as making a "determination" regarding judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), ascertaining, etc.

[0263] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory) as situations in which "judgment (decision)" is made.

[0264] Furthermore, "judgment (decision)" can also refer to resolving, selecting, choosing, establishing, and comparing as making "judgments (decisions)". In other words, "judgment (decision)" can also refer to certain operations as making "judgments (decisions)".

[0265] In addition, "judgment (decision)" can also be replaced with "assuming", "expecting", "considering", etc.

[0266] As used in this disclosure, the terms "connected," "coupled," or any variations thereof mean any direct or indirect connection or combination between two or more elements, including the presence of one or more intermediate elements between two elements that are "connected" or "coupled." The combination or connection between elements can be physical, logical, or a combination thereof. For example, "connected" can also be replaced with "access."

[0267] In this disclosure, when connecting two elements, it is possible to use more than one wire, cable, printed electrical connection, etc., and as some non-limiting and non-inclusive examples, to use electromagnetic energy with wavelengths in the wireless frequency domain, microwave domain, and optical (visible and invisible) domain, so that the two elements are "connected" or "combined" with each other.

[0268] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0269] In this disclosure, the terms "include," "including," and variations thereof are used in the same way as the term "comprising," meaning inclusive. Furthermore, the term "or" as used in this disclosure means not XOR.

[0270] In this disclosure, for example, where articles are added through translation as in English such as a, an, and the, this disclosure may also include nouns following these articles in plural form.

[0271] The invention disclosed herein has been described in detail above. However, it will be apparent to those skilled in the art that the invention is not limited to the embodiments described herein. The invention can be implemented as modifications and variations without departing from the spirit and scope of the invention as determined by the claims. Therefore, the description herein is for illustrative purposes only and has no limiting meaning regarding the invention.

Claims

1. A terminal, comprising: The receiving unit receives the master information block (MIB) within the synchronization signal block; and The control unit determines the frequency resources of CORESET0 based on the setting information associated with an index within the MIB, which is part of the set of setting information for the control resource set, namely CORESET0. The value of the set of setting information is set by the same index to a value different from the set of setting information used for the second terminal, which has a minimum channel bandwidth wider than the minimum channel bandwidth of the first terminal.

2. A wireless communication method, which is a wireless communication method for a terminal, comprising: The steps for receiving the Master Information Block (MIB) within the synchronization signal block; and The step of determining the frequency resources of CORESET0 based on the setting information associated with the index within the MIB from the set of setting information used to control the resource set, namely CORESET0. The value of the set of setting information is set by the same index to a value different from the set of setting information used for the second terminal, which has a minimum channel bandwidth wider than the minimum channel bandwidth of the first terminal.

3. A base station, comprising: The transmitting unit transmits the master information block (MIB) within the synchronization signal block; and The control unit determines the frequency resources of CORESET0 based on the setting information associated with an index within the MIB, which is part of the set of setting information for the control resource set, namely CORESET0. The value of the set of setting information is set by the same index to a value different from the set of setting information used for the second terminal, which has a minimum channel bandwidth wider than the minimum channel bandwidth of the first terminal.

4. A system comprising a terminal and a base station, The terminal has: The receiving unit receives the master information block (MIB) within the synchronization signal block; and The control unit determines the frequency resources of CORESET0 based on the setting information associated with an index within the MIB, which is part of the set of setting information used to control the resource set, namely CORESET0. The set of settings information values ​​is set to values ​​different from the set of settings information used for the second terminal, using the same index. The second terminal has a minimum channel bandwidth wider than the minimum channel bandwidth of the first terminal. The base station has a transmitting unit, which transmits the MIB.

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