Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure comprises a reception unit that receives one or more repetitions among a plurality of repetitions of a synchronization signal block, and a control unit that determines at least one of a repetition index and a synchronization signal block index on the basis of the one or more repetitions.

Description

Terminal, wireless communication method and base station

[0001] The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system.

[0002] Long Term Evolution (LTE) has been specified for the Universal Mobile Telecommunications System (UMTS) network with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

[0004] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010

[0005] Coverage extension is being considered for future wireless communication systems.

[0006] However, coverage extension of synchronization signal blocks (SSB, SS / PBCH blocks) has not been sufficiently considered. If such consideration is not sufficient, there is a risk of a decrease in communication quality / communication throughput.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately process synchronization signal blocks.

[0008] A terminal according to one aspect of the present disclosure has a receiving unit that receives one or more repetitions of a synchronization signal block, and a control unit that determines at least one of a repetition index and a synchronization signal block index based on the one or more repetitions.

[0009] According to one aspect of the present disclosure, synchronization signal blocks can be processed appropriately.

[0010] FIG. 1 shows an example of the locations of candidate SSBs in option 1 of embodiment 1-1. FIG. 2 shows an example of the locations of candidate SSBs in option 1a of embodiment 1-1. FIG. 3 shows an example of the locations of candidate SSBs in option 2 of embodiment 1-1. FIG. 4 shows an example of the locations of candidate SSBs in option 1 of embodiment 1-2. FIG. 5 shows an example of the locations of candidate SSBs in option 2 of embodiment 1-2. FIG. 6 shows an example of the locations of candidate SSBs in option 3 of embodiment 1-2. FIG. 7 shows an example of a repetition period in embodiment 1-3. FIG. 8 shows an example of a detection period in embodiment 1-3. FIG. 9 shows an example of option 1 for associating candidate SSBs with SSB indices in embodiment 1-4. FIG. 10 shows an example of option 2 for associating candidate SSBs with SSB indices in embodiment 1-4. FIG. 11 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 12 is a diagram showing an example of the configuration of a base station according to an embodiment. FIG. 13 is a diagram showing an example of the configuration of a user terminal according to an embodiment. Fig. 14 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to an embodiment. Fig. 15 is a diagram illustrating an example of a vehicle according to an embodiment.

[0011] (Initial Access Procedure) In the initial access procedure, a UE (RRC_IDLE mode) receives an SS / PBCH block (SSB), transmits Msg. 1 (PRACH / random access preamble / preamble), receives Msg. 2 (PDCCH, PDSCH including random access response (RAR)), transmits Msg. 3 (PUSCH scheduled by RAR UL grant), and receives Msg. 4 (PDCCH, PDSCH including UE contention resolution identity). After that, when an ACK for Msg. 4 is transmitted from the UE by the base station (network), an RRC connection is established (RRC_CONNECTED mode).

[0012] SSB reception includes PSS detection, SSS detection, PBCH-DMRS detection, and PBCH reception. PSS detection includes detecting part of the physical cell ID (PCI), detecting (synchronizing) OFDM symbol timing, and (coarse) frequency synchronization. SSS detection includes detecting the physical cell ID. PBCH-DMRS detection includes detecting (part of) the SSB index within a half radio frame (5 ms). PBCH reception includes detecting the system frame number (SFN) and radio frame timing (SSB index), receiving configuration information for receiving remaining minimum system information (RMSI, SIB1), and recognizing whether the UE can camp on that cell (carrier).

[0013] SSB has a bandwidth of 20 RBs and a time of 4 symbols. The transmission period of SSB can be set to {5, 10, 20, 40, 80, 160} ms. In a half frame, multiple symbol positions of SSB are defined based on the frequency range (FR1, FR2).

[0014] The PBCH has a payload of 56 bits. N repetitions of the PBCH are transmitted within a period of 80 ms, where N depends on the SSB transmission period.

[0015] The system information consists of the MIB, RMSI (SIB1), and other system information (OSI) carried by the PBCH. SIB1 contains information for RACH setup and RACH procedures. The time / frequency resource relationship between the SSB and the PDCCH monitoring resource for SIB1 is configured by the PBCH.

[0016] The PDSCH carrying SIB1 (SIB1 PDSCH) is transmitted periodically. The PDSCH is scheduled by Type 0-PDCCH. One SSB corresponds to one SIB1 PDSCH. One SIB1 PDSCH may or may not be repeated twice. SIB1 sets the public land mobile network (PLMN) ID. The PLMN ID may be an MNO (Mobile Network Operator) identifier.

[0017] A base station using beam correspondence transmits multiple SSBs using multiple beams (analog beams) for each SSB transmission period. The multiple SSBs may be referred to as SSB bursts. The multiple SSBs have multiple SSB indices. A UE that detects an SSB transmits a PRACH in the RACH occasion associated with that SSB index and receives an RAR in the RAR window.

[0018] (PRACH Configuration) The common RACH configuration (RACH-ConfigCommon) may include a generic RACH configuration (rach-ConfigGeneric), a total number of RA preambles (totalNumberOfRA-Preambles), and SSB per RACH occasion and contention-based (CB) preambles per SSB (ssb-perRACH-OccasionAndCB-PreamblesPerSSB). The rach-ConfigGeneric may include a PRACH configuration index (prach-ConfigurationIndex) and message 1 FDM (msg1-FDM, the number of PRACH occasions FDMed in one time instance). ssb-perRACH-OccasionAndCB-PreamblesPerSSB may contain the number of CB preambles per SSB for oneEighth (one SSB associated with eight RACH occasions) SSBs per RACH occasion.

[0019] For a Type 1 random access procedure (four-step random access procedure, messages 1 / 2 / 3 / 4), the UE may specify the number N of SS / PBCH blocks associated to one PRACH occasion and the number R of CB preambles per SS / PBCH block per valid PRACH occasion via ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0020] For a Type 1 random access procedure, or for a Type 2 random access procedure with PRACH occasion configuration independent of the Type 1 random access procedure (two-step random access procedure, message A / B), if N<1, one SS / PBCH block is mapped to 1 / N consecutive valid RACH occasions, and for each valid PRACH occasion, R CB preambles with consecutive indices associated with the SS / PBCH block index are mapped, starting with preamble index 0. If N>=1, R CB preambles with consecutive indices associated with the SS / PBCH block index n (0<=n<-N-1) are mapped, starting with preamble index n·N_preamble^total / N. where N_preamble^total is given by totalNumberOfRA-Preambles for a Type 1 random access procedure and by msgA-TotalNumberOfRA-Preambles for a Type 2 random access procedure that involves the configuration of a PRACH occasion independent of the Type 1 random access procedure, and N_preamble^total is a multiple of N.

[0021] Starting from frame 0, the association period for mapping SS / PBCH blocks to PRACH occasions is N Tx SSB The UE selects the smallest value in the set determined by the PRACH configuration period according to the relationship (defined in the specification) between the PRACH configuration period and the association period (number of PRACH configuration periods) such that N SS / PBCH block indices are mapped to a PRACH occasion at least once within that association period, where N SS / PBCH block indices are selected from the values ​​of ssb-PositionsInBurst in SIB1 or in the common serving cell configuration. Tx SSBIf after an integer number of mapping cycles from SS / PBCH block index to PRACH occasion within the association period, N Tx SSB If there is a set of PRACH occasions or PRACH preambles that are not mapped to an SS / PBCH block index, then no SS / PBCH block index is mapped to that set of PRACH occasions or PRACH preambles. An association pattern period includes one or more association periods and is determined such that the pattern between PRACH occasions and SS / PBCH block indices repeats at most every 160 ms. If there is a PRACH occasion that is not associated with an SS / PBCH block index after an integer number of association periods, then that PRACH occasion is not used for PRACH.

[0022] For PRACH transmissions triggered by higher layers (PRACH transmissions not triggered by a PDCCH order), if ssb-ResourceList is provided, the PRACH mask index is indicated by ra-ssb-OccasionMaskIndex, which indicates the PRACH occasion for the PRACH transmission associated with the selected SS / PBCH block index.

[0023] PRACH occasions are mapped consecutively for each corresponding SS / PBCH block index. The indexing of PRACH occasions indicated by the mask index value is reset for each SS / PBCH block index and for each successive PRACH occasion mapping cycle. In the first available mapping cycle, the UE selects for PRACH transmission the PRACH occasion indicated by the PRACH mask index value for the indicated SS / PBCH block index.

[0024] For a given preamble index, the order of PRACH occasions shall be as follows: First, in order of increasing frequency resource index for frequency multiplexed PRACH occasions; Second, in order of increasing time resource index for time multiplexed PRACH occasions within a PRACH slot; Third, in order of increasing PRACH slot index.

[0025] For PRACH transmissions triggered upon request from higher layers, if csirs-ResourceList is provided, the value of ra-OccasionList indicates a list of PRACH occasions for the PRACH transmission, where the PRACH occasions are associated with the selected CSI-RS index indicated by csi-RS. The indexing of the PRACH occasions indicated by ra-OccasionList is reset every association pattern period.

[0026] For PRACH configuration periods of 10, 20, 40, 80, and 160 msec, the association periods are {1, 2, 4, 8, 16}, {1, 2, 4, 8}, {1, 2, 4}, {1, 2}, and {1}, respectively.

[0027] The value of the PRACH mask index value (msgA-SSB-SharedRO-MaskIndex) is associated with the allowed PRACH occasions (PRACH occasion index values) of the SSB.

[0028] In one example (mapping 1) of association of PRACH occasions (RACH occasions (ROs)) and beams (SSB / CSI-RS) based on the higher layer parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB, if ssb-perRACH-OccasionAndCB-PreamblesPerSSB indicates oneHalf,n16 (N=½, R=16) and msg1-FDM is 4, four ROs are FDM-multiplexed in one time instance, and one SSB is mapped to two ROs. Preamble indices 0 to 15 are associated with two ROs, and preamble indices 0 to 15 are associated with SSB 0. In this way, when N<1, one SSB is mapped to multiple ROs. This increases the RO capacity per beam.

[0029] In another example (mapping 2) of association of ROs and beams based on the upper layer parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB, when ssb-perRACH-OccasionAndCB-PreamblesPerSSB indicates n4,n16 (N=4, R=16), msg1-FDM is 4, and N_preamble^total is 64, four ROs are FDM-multiplexed in one time instance, and four SSBs are mapped to one RO. One RO is associated with SSBs #0 to #3. Preamble indexes #0 to #15 are associated with SSB #0, preamble indexes #16 to #31 are associated with SSB #1, preamble indexes #32 to #47 are associated with SSB #2, and preamble indexes #48 to #63 are associated with SSB #3. In this way, the same RO is associated with different SS / PBCH block indices, and different preambles use different SS / PBCH block indices. The base station can distinguish the associated SS / PBCH block indices by the received PRACH.

[0030] The random access preamble can only be transmitted in the time resources specified in the random access configuration of the specification, which depends on whether it is FR1 or FR2 and the spectrum type (paired spectrum / supplementary uplink (SUL) / unpaired spectrum). The PRACH configuration index is given by the higher layer parameter prach-ConfigurationIndex or, if configured, by msgA-PRACH-ConfigurationIndex. In the specification, each value of the PRACH configuration index is associated with at least one of the following: preamble format, x and y in n_f (frame number) mod x = y, subframe number, starting symbol, number of PRACH slots in a subframe, number of time-domain PRACH occasions in a PRACH slot N_t^RA,slot, and PRACH duration N_dur^RA.

[0031] (SSB: Physical channels and modulation / Downlink / Physical signals / SS / PBCH block) The resources within an SS / PBCH block (SSB) for PSS, SSS, PBCH, and DMRS for PBCH are defined as follows: - PSS: -- OFDM symbol number l for start of SS / PBCH block = 0, subcarrier number k for start of SS / PBCH block = 56, 57, ..., 182 - SSS: -- OFDM symbol number l for start of SS / PBCH block = 2, subcarrier number k for start of SS / PBCH block = 56, 57, ..., 182 - Resources set to zero: -- OFDM symbol number l for start of SS / PBCH block = 0, subcarrier number k for start of SS / PBCH block = 0, 1, ..., 55, 183, 184, ..., 239 -- OFDM symbol number l for start of SS / PBCH block = 2, subcarrier number k for start of SS / PBCH block = 48, 49, ..., 55, 183, 184, ..., 191 - PBCH: -- OFDM symbol number l for start of SS / PBCH block = 1, 3, subcarrier number k for start of SS / PBCH block = 0, 1, ..., 239 -- OFDM symbol number l for start of SS / PBCH block = 2, subcarrier number k for start of SS / PBCH block = 0, 1, ..., 47, 192, 193, ..., 239 -- DMRS for PBCH: -- OFDM symbol number l for start of SS / PBCH block = 1, 3, subcarrier number k for start of SS / PBCH block = 0+v, 4+v, 8+v, ..., 236+v -- OFDM symbol number l for start of SS / PBCH block = 2, subcarrier number k for start of SS / PBCH block = 0+v, 4+v, 8+v, ..., 44+v, 192+v, 196+v, ..., 236+v

[0032] (SSB pattern: Physical layer procedures for control / Synchronization procedures / Cell search) In the existing specification, in a half frame with multiple SS / PBCH blocks, the first symbol index for multiple candidate SS / PBCH blocks is determined according to the SCS of the multiple SS / PBCH blocks as follows: where index 0 is the first symbol of the first slot in the half frame.

[0033] - Case A - 15 kHz SCS: The first symbol of multiple candidate SS / PBCH blocks has an index of {2,8}+14·n. -- For operation without shared spectrum channel access -- n=0,1 for carrier frequencies (FR1) below 3 GHz. -- n=0,1,2,3 for carrier frequencies in FR1 above 3 GHz. -- For operation with shared spectrum channel access, n=0,1,2,3,4.

[0034] - Case B - 30 kHz SCS: The first symbols of multiple candidate SS / PBCH blocks have indices {4, 8, 16, 20} + 28·n, where n=0 for carrier frequencies (FR1) below 3 GHz and n=0,1 for carrier frequencies within FR1 above 3 GHz.

[0035] - Case C - 30 kHz SCS: The first symbol of multiple candidate SS / PBCH blocks has an index of {2,8}+14·n. -- For operation without shared spectrum channel access -- For paired spectrum operation (FDD), n = 0,1 for carrier frequencies (FR1) less than or equal to 3 GHz, and n = 0,1,2,3 for carrier frequencies in FR1 greater than 3 GHz. For operation with shared spectrum channel access, n = 0,1,2,3,4. -- For unpaired spectrum operation (TDD), n = 0,1 for carrier frequencies (FR1) less than 1.88 GHz, and n = 0,1,2,3 for carrier frequencies in FR1 greater than or equal to 1.88 GHz. -- For operation with shared spectrum channel access, n=0,1,2,3,4,5,6,7,8,9.

[0036] - Case D - 120 kHz SCS: The first symbols of multiple candidate SS / PBCH blocks have indices {4, 8, 16, 20} + 28·n, where n=0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18 for carrier frequencies in FR2.

[0037] - Case E - 240 kHz SCS: The first symbols of multiple candidate SS / PBCH blocks have indices {8, 12, 16, 20, 32, 36, 40, 44} + 56·n, where n = 0, 1, 2, 3, 5, 6, 7, 8 for carrier frequencies in FR2-1.

[0038] - Case F - 480 kHz SCS: The first symbols of multiple candidate SS / PBCH blocks have indices of {2,9}+14·n, where n=0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 for carrier frequencies in FR2-2.

[0039] - Case G - 960 kHz SCS: The first symbols of multiple candidate SS / PBCH blocks have indices of {2,9}+14·n, where n=0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 for carrier frequencies in FR2-2.

[0040] In the above cases, if the SCS of the SS / PBCH block is not provided by ssbSubcarrierSpacing, the applicable case for a cell depends on the corresponding frequency band.

[0041] Candidate SS / PBCH blocks within a half frame are ordered in ascending time order from 0 to L - max It is indexed down to -1. - max is determined according to the SS / PBCH block pattern for cases A to G. max is the maximum number of SS / PBCH blocks in a cell, and the maximum number of SS / PBCH blocks transmitted in a half frame is L max is.

[0042] (NTN Coverage Extension) DL coverage extensions are being considered for Rel. 18 NR non-terrestrial networks (NTNs). For example, cases where the transmit power from a multi-beam satellite is insufficient due to power flux density limitations imposed by the International Telecommunication Union (ITU) are being considered. Additionally, NTN-specific repetition extensions are being considered beyond the techniques covered in the Rel. 17 coverage extensions for the relevant channels.

[0043] For DL ​​coverage extension, it has been investigated that the simulation results of SSB, Msg2, Msg4, PDSCH for 3 kbps, PDSCH for VoIP, PDCCH, etc. are insufficient.

[0044] (SSB Default Configuration) In Rel. 17, the default configuration for a UE is assumed as follows: ◇The UE can be provided with a multiple half-frame periodicity for reception of SS / PBCH blocks for each serving cell via ssb-periodicityServingCell. If the UE is not configured with a multiple half-frame periodicity for reception of SS / PBCH blocks, the UE assumes a single half-frame periodicity. The UE assumes that the periodicity is the same for all SS / PBCH blocks in the serving cell. ◇In initial cell selection, the UE may assume that multiple half-frames of multiple SS / PBCH blocks occur with a periodicity of two frames. ◇In operation without shared spectrum channel access, the SS / PBCH block index is the same as the candidate SS / PBCH block index. Candidate values ​​for ssb-periodicityServingCell include 5, 10, 20, 40, 80, 160 [ms]. ssb-periodicityServingCell is the SSB periodicity in ms for rate matching purposes. If the field is not present, the UE assumes 5.

[0045] (PBCH payload: Multiplexing and channel coding / Downlink transport channels and control information / Broadcast channel / PBCH payload generation) The bits in the transport block delivered to Layer 1 are a - _0, a - _1, a - _2, a - _3, ..., a - _A - -1, where A - is the payload size generated by the upper layer. The lowest order (first) information bit a -_0 is mapped to the most significant bit (MSB) of the transport block.

[0046] The following PBCH payload bits (information about additional timing) are generated / provided: - _A - , a - _A - +1, a - _A - +2, a - _A - +3 is the fourth, third, second, and first least significant bit (LSB) of the SFN, respectively. - _A - +4 is half frame bit a - _HRF. ◇L - max If = 10, a - _A - +5, a - _A - +6, a - _A - +7 follows the following: -◇a - _A - +5 is the MSB of k_SSB. - _A - +6 is reserved. - _A - +7 is the MSB of the candidate SS / PBCH block index. - max If = 20, a - _A - +5, a - _A - +6, a - _A - +7 follows the following: -◇a - _A - +5 is the MSB of k_SSB. - _A - +6, a - _A -+7 are the 5th and 4th bits of the candidate SS / PBCH block index, respectively. - max If = 64, a - _A - +5, a - _A - +6, a - _A - +7 follows the following: -◇a - _A - +5, a - _A - +6, a - _A - +7 are the 6th, 5th, and 4th bits of the candidate SS / PBCH block index, respectively. ◇ Otherwise, a - _A - +5, a - _A - +6, a - _A - +7 follows the following: -◇a - _A - +5 is the MSB of k_SSB. - _A - +6, a - _A - +7 is reserved.

[0047] (Combined SSB Detection) To reduce the block error rate (BLER) in SSB detection, the UE may combine and detect multiple SSBs within one SSB, or may combine and detect multiple SSBs across multiple SSB bursts.

[0048] Multiple SSBs within an 80 ms TTI of a PBCH transmission have the same MIB payload and k_SSB parameters, which the UE can detect using soft demodulation.

[0049] The information that can be changed in the PBCH payload regarding timing is the LSB of the SFN and the SSB index i_SSB. It is up to the UE implementation whether to use combined SSB detection using some method.

[0050] (Analysis) In coverage expansion, SSB coverage expansion has not been sufficiently considered. If SSB coverage expansion is not sufficiently considered, there is a risk of a decrease in communication quality / throughput.

[0051] Therefore, the present inventors came up with a method for extending the coverage of SSB.

[0052] (Various Reinterpretations, etc.) Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Note that each of the following embodiments (e.g., each case) may be used alone, or at least two of them may be combined and applied.

[0053] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0054] In the present disclosure, terms such as activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0055] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0056] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof. In the present disclosure, the terms RRC signaling, RRC IE, RRC parameter, and higher layer parameter may be interchangeable.

[0057] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0058] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0059] In this disclosure, "having the capability of..." may be read interchangeably as "supporting / reporting the capability of...".

[0060] In the present disclosure, ceil(x), ceiling function, and ceiling function may be interchangeable. In the present disclosure, floor(x), floor function, and floor function may be interchangeable. In the present disclosure, sqrt(x) and square root may be interchangeable. In the present disclosure, x mod y, mod(x,y), mod function, and modulo operation may be interchangeable. In the present disclosure, Σ i=M Nf(i), the summation of f(i) over i = M, M+1,...,N, and f(M) + f(M+1) +... + f(N) can be interpreted interchangeably. C(n,k) is the number of combinations of k values ​​from n values ​​(combinatorial coefficient), binomial coefficient, n C k , C n k , may be read interchangeably.

[0061] In this disclosure, a b , a_b, and a with b added to the bottom right of a may be read interchangeably. c , a^c, and the notation of a with c added to the upper right of a may be read interchangeably. b c , a_b^c, and the notation in which b is added to the bottom right of a and c is added to the top right may be read interchangeably. ~ may be expressed by adding 〜 to the x, or may be referred to as x tilde. - may be represented by an x ​​with a - or may be called an x-bar.

[0062] In the present disclosure, the frequency range corresponding to FR1 may be 410-7125 MHz. In the present disclosure, FR2 may include FR2-1 and FR2-2, and the frequency range corresponding to FR2-1 may be 24250-52600 MHz, and the frequency range corresponding to FR2-1 may be 52600-71000 MHz.

[0063] In the present disclosure, the terms first symbol / slot / SSB and starting symbol / slot / SSB may be read interchangeably.

[0064] In the present disclosure, system information (SI), part of system information, partial system information, MIB, SIB, SIB1, SIBx, downlink shared channel carrying system information, and PDSCH carrying system information may be read interchangeably.

[0065] In the present disclosure, the specific condition may include at least one of an FR, a band (frequency band), a scenario, an SSB SCS, a PDCCH SCS, an SCS combination type, an SCS combination, a multiplexing pattern, and a relationship between an SSB SCS and a PDCCH SCS.

[0066] In this disclosure, SCS, 15*2 μ kHz, SCS setting, μ, and numerology may be interchangeable. In the present disclosure, an SCS greater than 960 kHz and μ greater than 6 may be interchangeable. In the present disclosure, reference SCS μ_0 and μ_ref may be interchangeable. In the present disclosure, first symbol and start symbol may be interchangeable. In the present disclosure, symbol index, symbol position, and time position may be interchangeable. In the present disclosure, SSB pattern, SSB position pattern, SSB start symbol index, and SSB first symbol index may be interchangeable.

[0067] In the present disclosure, CORESET, CORESET #0, controlResourceSetZero, Type 0-PDCCH, PDCCH scheduling SIB1 PDSCH, CORESET for PDCCH scheduling SIB1 PDSCH, CORESET for Type 0-PDCCH, Type 0-PDCCH monitoring occasion, Type 0-PDCCH CSS set, CORESET for Type 0-PDCCH CSS set, search space #0, searchSpaceZero, and CORESET for search space #0 may be read as interchangeable.

[0068] In the present disclosure, the PDCCH SCS, the CORESET SCS, and the CORESET#0 SCS may be read as interchangeable.

[0069] In the present disclosure, the number of repetitions, the repetition factor, the number of repetitions, and K may be read interchangeably.

[0070] In the present disclosure, the terms position, time position, starting symbol index, time resource, candidate SSB position, SSB pattern, and repetition pattern may be read interchangeably.

[0071] In the present disclosure, the terms unit time, period, subframe, slot, half-frame, frame, and transmission time interval (TTI) may be read interchangeably.

[0072] In this disclosure, the terms SSB index, candidate SSB index, block index, candidate SS / PBCH block index, DL beam, spatial domain receive filter, TCI state, and QCL assumption may be interchangeable. In this disclosure, the terms candidate SSB#i and candidate SSB with SSB index i may be interchangeable.

[0073] In the present disclosure, the terms specific time, specific duration, and half frame may be read interchangeably.

[0074] In the present disclosure, the terms "sequential candidate SSBs," "sequential candidate SSB resources," "sequential candidate SSBs each having consecutive candidate SSB indices," "sequential time resources for SSBs," and "starting symbol index of SSBs" may be interchangeable. The time resources for SSBs may be contiguous or discontinuous.

[0075] In the present disclosure, an SSB burst and multiple candidate SSBs corresponding to different multiple SSB indices may be read interchangeably.

[0076] In the present disclosure, the terms original candidate SSB, first candidate SSB, regular / periodic candidate SSB, standard / normal candidate SSB, specific candidate SSB, and specific SSB may be interchangeable. In the present disclosure, the terms SSB, candidate SSB, candidate SSB, and SSB burst may be interchangeable. In the present disclosure, the terms repeat, repeat SSB, repeat SSB burst, candidate SSB other than the original candidate SSB, and SSB burst other than the original SSB burst may be interchangeable.

[0077] In the present disclosure, K repetitions of a candidate SSB, one original candidate SSB, and (K-1) repetitions of that original candidate SSB may be interchangeable. In the present disclosure, repeated candidate SSB, repetition of original candidate SSB, and candidate SSB corresponding to the original candidate SSB may be interchangeable. In the present disclosure, repetition of candidate SSB, original candidate SSB, and repeated candidate SSB may be interchangeable.

[0078] In this disclosure, K repetitions of an SSB burst, one original SSB burst, and (K-1) repetitions of that SSB burst ((K-1) repeated bursts) may be read interchangeably. In this disclosure, repetitions of an SSB burst, original SSB burst, and repeated SSB burst may be read interchangeably.

[0079] In the present disclosure, a candidate SSB may refer to at least one of an original candidate SSB and a repeated candidate SSB. In the present disclosure, an SSB burst may refer to at least one of an original SSB burst and a repeated SSB burst.

[0080] In the present disclosure, the legacy UE (specific terminal) may be a terminal that does not support SSB repetition. In the present disclosure, the new UE may be a terminal that supports SSB repetition. In the present disclosure, supporting SSB repetition and reporting capability information indicating support for SSB repetition may be interpreted as interchangeable.

[0081] In the present disclosure, an original candidate SSB may refer to a candidate SSB without repetition, may refer to a candidate SSB that can be received by legacy UEs, or may refer to a candidate SSB that can be received by both legacy UEs and new UEs. In the present disclosure, a repeated candidate SSB may refer to a repetition of an original candidate SSB, may refer to a candidate SSB that cannot be received by legacy UEs, or may refer to a candidate SSB that can be received only by new UEs.

[0082] In this disclosure, an original SSB burst may refer to an SSB burst without repetition, may refer to an SSB burst that can be received by legacy UEs, or may refer to an SSB burst that can be received by both legacy UEs and new UEs. In this disclosure, a repeated SSB burst may refer to a repetition of an original SSB burst, may refer to an SSB burst that cannot be received by legacy UEs, or may refer to an SSB burst that can be received only by new UEs.

[0083] (Wireless Communication Method) <First Embodiment> This embodiment relates to SSB repetition.

[0084] In a specific scenario, SSB repetition may be supported. The specific scenario may be, for example, an NTN scenario. In the present disclosure, SSB repetition may mean transmitting an SSB associated with a certain SSB index multiple times in each SSB transmission period / detection period. In the present disclosure, the SSB may be any signal used for synchronization and is not limited to SSB.

[0085] <<Embodiment 1-1>> The SSB pattern involving repetition of SSB (repetition pattern) may follow at least one of the following options.

[0086] ◇Option 1: Multiple consecutive candidate SSB resources may be used for multiple repetitions of the same candidate SSB. After one original candidate SSB is allocated / mapped, repetitions of that original candidate SSB (multiple repeated candidate SSBs corresponding to the original candidate SSB) may be allocated / mapped sequentially to multiple consecutive candidate SSB resources. This option may be subject to at least one of the following characteristics: ◇After N original candidate SSBs (original SSB bursts), each having N different candidate SSB indices, are transmitted, corresponding (K-1) repeated candidate SSBs may be transmitted sequentially for each original candidate SSB. ◇In the example of Figure 1, the number of candidate SSBs N is 4, the four candidate SSB indices are 0, 1, 2, and 3, and the number of repetitions K is 4. In this example, after the four original candidate SSBs are transmitted, a set containing (K-1) repeat candidate SSBs with candidate SSB index 0, a set containing (K-1) repeat candidate SSBs with candidate SSB index 1, a set containing (K-1) repeat candidate SSBs with candidate SSB index 2, and a set containing (K-1) repeat candidate SSBs with candidate SSB index 3 are transmitted in this order. The order of the N sets may be different from the order of the candidate SSB indices or from the order of the original candidate SSBs. For example, the candidate SSB indices of the four sets may be 3, 2, 1, 0 or 3, 0, 1, 2, respectively. The time from the start of the original candidate SSB to the start of the repeat candidate SSB may be the time offset described in embodiment 1-2, or the repeat period described in embodiment 1-2 / embodiment 1-3, respectively. -◇The time from the start of the repetition of a certain candidate SSB (a repeat candidate SSB corresponding to a certain SSB index) to the start of the repetition of the next candidate SSB (a repeat candidate SSB corresponding to the next SSB index) may be the repetition period of embodiments 1-2 / 1-3 described below. -◇N original candidate SSBs and N sets of (K-1) repeat candidate SSBs may be transmitted for each detection period. The detection period may be the detection period of embodiments 1-3 described below.

[0087] ◇Option 1a: Consecutive candidate SSB resources may be used for multiple repetitions of the same candidate SSB. Multiple repetitions of one candidate SSB may be sequentially allocated / mapped to consecutive candidate SSB resources. This option may be subject to at least one of the following characteristics: -◇For each candidate SSB index, K repetitions of the candidate SSB may be transmitted consecutively. -◇In the example of Figure 2, the number of candidate SSBs N is 4, the four candidate SSB indices are 0, 1, 2, and 3, and the number of repetitions K is 4. In this example, a set including K repetitions of the candidate SSB with candidate SSB index 0, a set including K repetitions of the candidate SSB with candidate SSB index 1, a set including K repetitions of the candidate SSB with candidate SSB index 2, and a set including K repetitions of the candidate SSB with candidate SSB index 3 are transmitted in sequence. -◇The order of the N sets may differ from the order of the corresponding candidate SSB indices. For example, the four candidate SSB indices corresponding to the four sets may be 3, 2, 1, 0 or 3, 0, 1, 2 in chronological order. -◇The time from the start of a repetition of a candidate SSB (a repetition corresponding to a certain SSB index) to the start of a repetition of the next candidate SSB (a repetition corresponding to the next SSB index) may be the repetition period of embodiments 1-2 / 1-3 described below. -◇N sets of K repetitions may be transmitted for each detection period. The detection period may be the detection period of embodiments 1-3 described below.

[0088] ◇Option 2: Consecutive candidate SSB resources may be used for multiple repetitions of different candidate SSBs. Repetitions of an SSB burst containing different candidate SSBs may be sequentially allocated / mapped to consecutive candidate SSB resources. This option may be in accordance with at least one of the following characteristics: ◇One SSB burst may contain N candidate SSBs, and K repetitions of the SSB burst (K SSB bursts) may be transmitted. The N candidate SSBs in an SSB burst may have N different candidate SSB indices, respectively. The first SSB burst of the K SSB bursts may be the N original candidate SSBs (original SSB burst). SSB bursts other than the first of the K SSB bursts may be (K-1) repetitions of the original SSB burst (repeated SSB bursts). This option may be in accordance with at least one of the following characteristics: 3, the number of candidate SSBs N is 4, the four candidate SSB indices are 0, 1, 2, and 3, and the number of repetitions K is 4. In this example, N original candidate SSBs (original SSB bursts) corresponding to candidate SSB indices 0, 1, 2, and 3, respectively, are transmitted, followed by (K-1) repeated SSB bursts. The order of the candidate SSBs in each SSB burst may differ from the order of the candidate SSB indices. For example, the four candidate SSB indices corresponding to the four candidate SSBs in each SSB burst may be 3, 2, 1, and 0, or 3, 0, 1, and 2, respectively. The time from the start of one repetition of an SSB burst to the start of the next repetition may be the repetition period of embodiments 1-2 and 1-3 described below. K repetitions of an SSB burst may be transmitted for each detection period. The detection period may be the detection period of embodiments 1-3 described below.

[0089] The SSB pattern with repetition of SSB (repetition pattern) may be defined in the specification.

[0090] The K repetitions of a candidate SSB may consist of one original candidate SSB and (K-1) repeated candidate SSBs corresponding to the original candidate SSB. The K repetitions of an SSB burst may consist of one original SSB burst and (K-1) repeated SSB bursts corresponding to the original SSB burst.

[0091] Option 1 / 2 may be applied to an extension of an existing specification (e.g., 5G NR). The time position of the original candidate SSB may be determined by repurposing / reusing the time position of the candidate SSB in NR. Multiple repeated candidate SSBs may be transmitted after the corresponding original candidate SSB.

[0092] Option 1a may be applied to new specifications (e.g., 6G and beyond).

[0093] A UE that does not have the capability to detect repeated SSB bursts may only detect the original SSB burst. If the UE attempts to detect the repeated SSB burst, it is assumed that the UE will fail to decode the PBCH in the repeated SSB burst. A UE that has the capability to detect repeated SSB bursts can detect either the original SSB burst or the corresponding repeated SSB burst, or both.

[0094] <<Embodiment 1-2>> The repeat position (repetition position) of the candidate SSB may follow at least one of the following options.

[0095] Option 1: Transmission of a repeat candidate SSB (a repeat of that SSB burst) may be initiated in the unit of time following the unit of time at which transmission of the last original candidate SSB (within an SSB burst) begins. In the example of FIG. 4, the unit of time is a subframe, and the number of candidate SSBs, N, is 4. Transmission of the last original candidate SSB in an SSB burst containing N original candidate SSBs begins in subframe 0, and transmission of the corresponding repeat SSB burst begins in the next subframe 1. Transmission of multiple repeats of the last original candidate SSB may be initiated in the unit of time following the unit of time at which transmission of the last original candidate SSB begins. Transmission of the corresponding repeat SSB burst may be initiated in the unit of time following the unit of time at which transmission of the original SSB burst ends. The original SSB burst / repeat SSB burst may be initiated every repetition period. The repetition period may conform to embodiments 1-3 described below.

[0096] ◇Option 2: A corresponding repeat candidate SSB may start after a time offset (gap) from the start of an original candidate SSB. The time offset may be T ms. T may be defined in the specification. T may be 5, 10, ..., etc. In the example of Figure 5, the number of candidate SSBs, N, is 4. Transmission of an original SSB burst containing N original candidate SSBs is started, and transmission of (K-1) repeat SSB bursts corresponding to the original SSB burst is started a time offset T ms from the start of transmission of the original SSB burst. This option allows flexible placement of repeat candidate SSBs / repeated SSB bursts relative to the original candidate SSB / original SSB burst. The time offset may be defined for a specific scenario / specific FR / specific band. In an NTN scenario, the time offset may depend on the satellite's position / orbit. The time offset method described above may be applied to the time offset between repeats of a repeat candidate SSB, and the time offset value may be different for different repeats.

[0097] ◇Option 3: Each repetition (original candidate SSB / repeated candidate SSB / original SSB burst / repeated SSB burst) may be initiated every repetition period (time interval). The repetition period may be the time from the start of a repetition to the start of the next repetition. The repetition period may be T' ms. T' may be defined in the specification. T' may be 5, 10, ..., etc. In the example of Figure 6, the number of candidate SSBs, N, is 4. Transmission of an original SSB burst containing N original candidate SSBs is initiated, and transmission of a repeated SSB burst corresponding to that original SSB burst is initiated every repetition period T' ms from the start of transmission of the original SSB burst.

[0098] The location of the repeat of the candidate SSB may be defined in the specification.

[0099] The position of the first symbol of each candidate SSB for repetition may be defined in the specification.

[0100] The repeat position of the candidate SSB may be defined relative to the position of the original candidate SSB, or may be defined as an offset relative to the position of the original candidate SSB.

[0101] The repeat position of the candidate SSB may be defined relative to the first symbol of the first slot of the specific time containing the original candidate SSB, or may be defined as an offset relative to the first symbol of the first slot of the specific time containing the original candidate SSB.

[0102] <<Embodiments 1-3>> The repetition period of a candidate SSB / SSB burst for a specific scenario / specific FR / specific band, etc., may be defined as X ms in the specifications, or as T' ms in repetition position option 3. The specific scenario / specific FR / specific band may be, for example, a scenario / frequency / band for NTN. X may be 5, 10, 15, .... The repetition period may be the time from the start of the original candidate SSB to the start of the repetition of that candidate SSB, or the time from the start of the repetition of the candidate SSB to the start of the next repetition of that candidate SSB. In the example of Figure 7, the number of candidate SSBs, N, is 4. The repetition period of an SSB burst containing four candidate SSBs is X ms.

[0103] The default value of the detection period for a UE to detect a candidate SSB in a specific scenario / specific FR / specific band may be defined as Y ms in the specification, where Y may be 5, 10, 15, 20, 30, 40, etc. The detection period may be the time from the start of the original candidate SSB to the next start of the original candidate SSB, or the time from the start of K repetitions of the candidate SSB to the start of the next K repetitions of the candidate SSB after the end of the K repetitions.

[0104] The default value of the SSB detection period for an existing UE is 20 ms. Y may be smaller than the existing default value (for example, 5, 10, or 15). Y may be larger than the existing default value (for example, 30 or 40).

[0105] In the example of Figure 8, the number of candidate SSBs, N, is 4, and the number of repetitions, K, is 4. The repetition period of an SSB burst containing N candidate SSBs is X ms. The detection period is Y ms. K repetitions of the SSB burst may be transmitted per detection period.

[0106] If a smaller detection period is used, analysis of more combined SSBs within one TTI is supported, and the existing SSB pattern can be maintained while the PBCH detection process becomes faster. The UE can detect SSBs more frequently so that the recurrence goal is achieved.

[0107] When a larger detection period is used, the allocation of other resources is not significantly affected. When a larger cycle / detection period is used, the time resources within the period may be distributed to multiple operators in site sharing or may be used for beam switching for analog beam sweeping.

[0108] The repetition period / detection period may be applied to an existing SSB pattern or to a newly defined SSB pattern with repetition.

[0109] <<Embodiment 1-4>> Regarding SSB repetition, at least one of the following parameters may be introduced.

[0110] ◇ Number of Repetitions The number of repetitions (repetition number K) of a candidate SSB may be defined in the specification. The repetition number may be, for example, repetitionNum or nrofRepetitions. The value range of the repetition number may include, for example, at least one of {1, 2, 3, 4, ...}. Whether SSB repetition is performed in a specific scenario / specific FR / specific band may be defined in the specification. The number of repetitions in a specific scenario / specific FR / specific band may be defined in the specification.

[0111] Repetition Index A new information element (repetition index) for counting the repetition index may be defined in the specification. The repetition index may be, for example, repetitionId-19 or repetitionId. The repetition index may indicate that the candidate SSB is the kth repetition. The value range of the repetition index may be {0, 1, ..., repetitionNum-1}. A repetition index of 0 may mean no repetition. The UE may determine the repetition index of the candidate SSB based on its repetition. The repetition index may be signaled by at least one of the PSS, SSS, MIB (PBCH), and PBCH DMRS. At least one sequence / sequence number of the PSS, SSS, and PBCH DMRS may be associated with the repetition index. For example, the repetition index may be conveyed by the PBCH DMRS pattern or the PBCH DMRS sequence. The repetition index can be used to assist in determining the repetition position of the candidate SSB. The UE may detect / determine a repetition index from at least one of the PSS, SSS, and PBCH DMRS within one repetition of the candidate SSB.

[0112] SFN / Half Frame Information (SFN Information / Half Frame Indication) The SFN / Half Frame information may follow at least one of the following options:

[0113] Option 1: The SFN / half-frame information of the corresponding original candidate SSB is carried in multiple repetitions of the candidate SSB. The same SFN / half-frame information may be carried in all repetitions of the same candidate SSB.

[0114] - ◇Option 2: Each repetition of a candidate SSB carries the SFN / half-frame information of that repetition. The SFN / half-frame information carried among multiple repetitions of the same candidate SSB may differ.

[0115] SSB Index The SSB index may follow at least one of the following options:

[0116] - ◇Option 1: Each candidate SSB has K repetitions. All repetitions of one candidate SSB have the same SSB index. In the example of Figure 9, the number of candidate SSBs N in one SSB burst is 4, and the number of repetitions K is 4. The N candidate SSBs in one SSB burst have N different SSB indices 0, 1, 2, and 3, respectively. The N candidate SSBs in each repetition of the SSB burst have N different SSB indices 0, 1, 2, and 3, respectively.

[0117] - ◇Option 2: Each candidate SSB has K repetitions. All repetitions of one candidate SSB have different SSB indices. In the example of Figure 10, the number of candidate SSBs N in one SSB burst is 4, and the number of repetitions K is 4. The K x N candidate SSBs in the K SSB bursts have different K x N SSB indices 0, 1, ..., 15, respectively.

[0118] -◇Option a: Regarding Options 1 / 2, the UE may follow at least one of the following procedures: --◇The UE may receive one or more candidate SSBs (original candidate SSBs / repeated candidate SSBs) and determine an SSB index corresponding to the candidate SSB based on the one or more candidate SSBs. If the UE receives multiple candidate SSBs corresponding to multiple SSB indices, it may determine one SSB index corresponding to the best candidate SSB from the multiple SSB indices based on the received power of the multiple candidate SSBs. The UE may perform a random access procedure using a random access resource (random access channel (RACH) resource) corresponding to the determined SSB index. --◇In Options 1 / 2, the UE may detect / determine an SSB index to be used for the random access procedure (determining the RACH resource) from one candidate SSB from the one or more detected / received candidate SSBs (original candidate SSBs / repeated candidate SSBs). The UE may detect / determine an SSB index to be used for the random access procedure based on the received power for each candidate SSB. In option 1, the UE may detect / determine an SSB index for the random access procedure from one or more candidate SSBs having the same SSB index among one or more detected / received candidate SSBs (original candidate SSBs / repeated candidate SSBs). The UE may detect / determine an SSB index for the random access procedure based on the received power for each SSB index. The UE may measure / determine the received power corresponding to one or more candidate SSBs having the same SSB index by combining the received powers of the candidate SSBs having the same SSB index, or may measure / determine the received power corresponding to the SSB index using the first or last received power among one or more candidate SSBs having the same SSB index.

[0119] ◇Pattern Information The pattern information may indicate the SSB / repetition pattern. The pattern information may indicate at least one of the repetition pattern (option 1 / 1a / 2), the repetition position (option 1 / 2 / 3), the repetition period, and the detection period. It may be signaled by at least one of the PSS, SSS, MIB (PBCH), and PBCH DMRS.

[0120] PSS / SSS Sequences To prevent UEs that do not support SSB repetition from detecting repeat candidate SSBs, new PSS / SSS sequences for repeat candidate SSBs may be designed. In this case, the UE can know whether the received SSB is a repeat candidate SSB or an original candidate SSB before decoding the PBCH.

[0121] The information carried by the repetition of an SSB may be different from that carried by the original candidate SSB. For example, at least one of the following information may be different between the information carried by the original candidate SSB and the information carried by the repetition of an SSB: SFN / half-frame information, SSB index, and PSS / SSS sequence. For example, at least one of the following information: repetition number and repetition index may not be carried by the original candidate SSB, but may be carried by the repetition of an SSB.

[0122] The center frequencies of the multiple repetitions of the SSB may be the same or different (and frequency hopping may be applied to the multiple repetitions), in other words, the center frequencies of the multiple repetitions of the SSB may lie on one synchronization raster or on multiple synchronization rasters.

[0123] According to this embodiment, the coverage of SSB can be extended.

[0124] <Required Function / Optional Function> At least one function in the above-described embodiments may be a mandatory function for a UE in a specific radio communication system (RAT, for example, 6G or later). The UE may configure / instruct or execute the function without reporting a UE capability for the function (mandatory without capability signaling). The UE may be required to report a UE capability for the function (mandatory with capability signaling).

[0125] At least one feature in the above-described embodiments may be an optional feature for the UE in a particular radio communication system (RAT, e.g., 5G NR). A UE that supports the feature may report its UE capability for the feature.

[0126] <Supplementary Information> [Notification of Information to UE] In the above-described embodiments, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, reception of any information from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0127] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards.

[0128] When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0129] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0130] [Notification of Information from UE] In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0131] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader.

[0132] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0133] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0134] [Application of Each Embodiment] At least one of the above-described embodiments may be applied when a specific condition is met. The specific condition may be defined in a standard or may be notified to a UE / BS using higher layer signaling / physical layer signaling.

[0135] The specific condition may indicate at least one of the following: ◇ A specific scenario. The specific scenario may be an all-NTN scenario or a specific NTN scenario. The specific NTN scenario may be a specific NTN type or a specific satellite type. ◇ A specific FR. ◇ A specific band.

[0136] At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0137] The specific UE capability may indicate at least one of the following: ◇Supporting specific processes / operations / controls / information for at least one of the above embodiments. ◇The UE supports SSB repetition. ◇The UE supports SSB repetition in a specific scenario. ◇The UE supports SSB repetition in a specific FR. ◇The UE supports SSB repetition in a specific band.

[0138] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0139] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0140] The specific UE capabilities may be defined as mandatory functions without UE capability signaling, or as mandatory functions with UE capability signaling, or as optional functions without UE capability signaling, or as optional functions with UE capability signaling.

[0141] Furthermore, at least one of the above-described embodiments may be applied when a UE configures / activates / triggers specific information related to the above-described embodiments (or performs the operations of the above-described embodiments) through higher layer signaling / physical layer signaling. The specific information may indicate at least one of the following: ◇ Information indicating enabling / disabling the operations of the above-described embodiments. ◇ RRC parameters for a specific release (e.g., Rel. 18 / 19). The RRC parameters may have names that are the names of existing RRC parameters with "r18" / "r19" added.

[0142] If the UE does not support at least one of the specific UE capabilities or the specific information is not configured, the UE may, for example, apply the behavior of a release earlier than the specific release.

[0143] (Supplementary Notes) The following inventions are supplemented with respect to one embodiment of the present disclosure. [Supplementary Note 1] A terminal having: a receiving unit that receives one or more repetitions of a synchronization signal block; and a control unit that determines at least one of a repetition index and a synchronization signal block index based on the one or more repetitions. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the multiple repetitions are sequentially arranged on multiple time resources. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein multiple synchronization signal blocks corresponding to multiple synchronization signal block indexes respectively are sequentially arranged on multiple time resources. [Supplementary Note 4] The terminal according to any of Supplements 1 to 3, wherein the multiple repetitions include the synchronization signal block that can be received by a specific terminal that does not support the multiple repetitions and one or more synchronization signal blocks that cannot be received by the specific terminal.

[0144] (Wireless Communication System) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0145] 11 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0146] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may 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.

[0147] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (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.

[0148] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0149] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0150] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0151] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0152] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0153] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0154] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0155] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0156] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0157] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, 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), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0158] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0159] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0160] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0161] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0162] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0163] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0164] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0165] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0166] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0167] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0168] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0169] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0170] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0171] (Base Station) Fig. 12 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0172] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0173] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0174] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0175] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0176] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0177] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0178] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0179] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0180] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0181] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0182] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0183] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

[0184] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0185] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may 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 may be output to the control unit 110.

[0186] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0187] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0188] The control unit 110 may include a signal indicating at least one of a repetition index and a synchronization signal block index in one or more of the multiple repetitions of a synchronization signal block (e.g., SSB). The transceiver unit 120 may transmit the multiple repetitions.

[0189] (User Terminal) Fig. 13 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0190] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0191] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0192] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0193] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0194] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0195] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0196] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0197] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0198] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0199] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0200] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0201] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0202] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0203] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0204] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may 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 may be output to the control unit 210.

[0205] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0206] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0207] The transceiver 220 may receive one or more of a plurality of repetitions of a synchronization signal block (e.g., K repetitions of a candidate SSB, or one original candidate SSB and (K-1) repetition candidate SSBs). The controller 210 may determine at least one of a repetition index and a synchronization signal block index (e.g., an SSB index) based on the one or more repetitions.

[0208] The multiple repetitions may be sequentially arranged across multiple time resources (eg, candidate SSB positions).

[0209] A plurality of synchronization signal blocks corresponding to the plurality of synchronization signal block indexes respectively may be sequentially arranged in a plurality of time resources.

[0210] The multiple repetitions may include the synchronization signal block (e.g., original candidate SSB) that can be received by a specific terminal (e.g., legacy UE) that does not support the multiple repetitions, and one or more synchronization signal blocks (e.g., repeat candidate SSB) that cannot be received by the specific terminal.

[0211] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0212] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0213] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 14 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0214] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0215] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0216] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0217] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0218] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0219] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0220] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0221] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0222] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0223] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0224] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0225] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0226] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed 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.

[0227] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0228] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0229] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot 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 (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0230] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0231] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0232] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0233] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0234] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0235] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0236] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0237] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0238] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0239] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0240] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0241] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0242] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0243] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0244] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio 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, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0245] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0246] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0247] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0248] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0249] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0250] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0251] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0252] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0253] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0254] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0255] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0256] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0257] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0258] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. Furthermore, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0259] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0260] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0261] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0262] Furthermore, in the present disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) property," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0263] In the present disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In the present disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0264] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and the TCI may be interchangeable. The spatial relationship information and the spatial relationship may be interchangeable.

[0265] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0266] 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 partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0267] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0268] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0269] A mobile station may also be referred to 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 some other suitable terminology.

[0270] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0271] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0272] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0273] 15 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0274] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0275] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0276] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0277] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0278] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0279] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0280] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0281] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0282] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0283] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0284] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0285] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0286] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0287] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0288] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0289] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0290] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0291] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0292] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0293] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0294] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some kind of action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0295] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0296] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ...." "does not expect ..." may be interchangeably read as "be not expected ...." Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (e.g., if apparatus A is a UE, apparatus B may be a base station).

[0297] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0298] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to 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" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0299] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0300] In the present 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 "coupled" may also be interpreted in the same way as "different."

[0301] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0302] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0303] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0304] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0305] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be approximately zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after a time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0306] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0307] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A terminal comprising: a receiving unit that receives one or more repetitions among a plurality of repetitions of a synchronization signal block; and a control unit that determines at least one of a repetition index and a synchronization signal block index based on the one or more repetitions.

2. The terminal according to claim 1, wherein the plurality of repetitions are sequentially arranged in a plurality of time resources.

3. The terminal according to claim 1, wherein a plurality of synchronization signal blocks respectively corresponding to a plurality of synchronization signal block indexes are sequentially arranged in a plurality of time resources.

4. The terminal according to claim 1, wherein the plurality of repetitions include the synchronization signal block that can be received by a specific terminal that does not support the plurality of repetitions, and one or more synchronization signal blocks that cannot be received by the specific terminal.

5. A wireless communication method for a terminal, comprising: receiving one or more repetitions among a plurality of repetitions of a synchronization signal block; and determining at least one of a repetition index and a synchronization signal block index based on the one or more repetitions.

6. A base station comprising: a control unit that includes a signal indicating at least one of a repetition index and a synchronization signal block index in one or more repetitions among a plurality of repetitions of a synchronization signal block; and a transmitting unit that transmits the plurality of repetitions.