Method and apparatus for transmitting and receiving signals in a wireless communication system

Abstract

In one embodiment of the present invention, a method and apparatus for transmitting and receiving a signal in a wireless communication system includes receiving a second SSB based on a first SSB, where (i) a GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset are used to receive the second SSB.

Description

Technical Field

[0001] The present invention relates to a method and an apparatus used in a wireless communication system.

Background Art

[0002] Wireless communication systems have been widely deployed to provide various communication services such as voice and data. Generally, a wireless communication system is a multiple access system that can share available system resources (such as bandwidth and transmission power) to assist communication with multiple users. Examples of multiple access systems include CDMA (code division multiple access) systems, FDMA (frequency division multiple access) systems, TDMA (time division multiple access) systems, OFDMA (orthogonal frequency division multiple access) systems, SC-FDMA (single carrier frequency division multiple access) systems, and the like.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The technical problem to be achieved by the present invention is to provide a method and an apparatus for efficiently transmitting and receiving signals in a wireless communication system.

[0004] The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems can be inferred from the embodiments of the present invention.

Means for Solving the Problems

[0005] The present invention provides a method and an apparatus for signal transmission and reception in a wireless communication system.

[0006] As one aspect of the present invention, in a wireless communication system, a method for a terminal (UE) to receive a signal, comprising: sensing a first SSB (synchronization signal and physical broadcast channel block); determining the closest GSCN (global synchronization channel number) of a second SSB having a CORESET (control resource set) for a type 0-PDCCH (physical downlink control channel) CSS (common search space) set based on a determination that there is no CORESET for the type 0-PDCCH CSS set in the first SSB; and receiving the second SSB based on the closest GSCN, wherein the closest GSCN is determined based on (i) the interval from the lowest subcarrier in a CRB (common resource block) to the lowest subcarrier of the first SSB, (ii) the GSCN of the first SSB, (iii) a step size, and (iiiv) a GSCN offset, and the step size is determined based on the frequency band in which the first SSB is sensed, a signal receiving method is provided.

[0007] As one aspect of the present invention, in a wireless communication system, a method for a base station (BS) to transmit a signal, comprising: transmitting a first SSB (synchronization signal and physical broadcast channel block) in which there is no CORESET (control resource set) for a type 0-PDCCH (physical downlink control channel) CSS (common search space) set; transmitting a second SSB having a CORESET for the type 0-PDCCH CSS set; wherein the closest GSCN (global synchronization channel number) of the second SSB is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset, and the step size is determined based on the frequency band in which the first SSB is sensed. A signal transmission method is provided.

[0008] As another aspect of the present invention, an apparatus, a processor, and a storage medium for performing the cell search method are provided.

[0009] The above apparatus includes at least a terminal, a network, and an autonomous vehicle capable of communicating with other autonomous vehicles other than communication devices.

[0010] The above-described aspects of the present invention are only a part of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention can be derived and understood by those with ordinary knowledge in the art based on the detailed description of the present invention described below.

Effects of the Invention

[0011] According to an embodiment of the present invention, when a signal is transmitted and received between a terminal and a base station, there is an advantage that more efficient signal transmission and reception can be performed by an operation different from the conventional invention.

[0012] The technical effects of the present invention are not limited to the above-described technical effects, and other technical effects can be inferred from the embodiments of the present invention.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figures 5-6

Figures 7-10

Modes for Carrying Out the Invention

[0014] The following technologies can be used in various wireless connection systems such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA, etc. CDMA can be implemented by wireless technologies such as UTRA (Universal Terrestrial Radio Access) and CDMA2000. TDMA can be implemented by wireless technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented by wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (Evolved UTRA), etc. UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project): registered trademark: the same below LTE (long term evolution) is part of E-UMTS (Evolved UMTS) using E-UTRA, and LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0015] For a clearer explanation, the description is based on the 3GPP communication system (e.g., LTE-A, NR), but the technical idea of the present invention is not limited thereto. LTE means the technology after 3GPP TS 36.xxx Release 8. Specifically, the LTE technology after 3GPP TS 36.xxx Release 10 is called LTE-A, and the LTE technology after 3GPP TS 36.xxx Release 13 is called LTE-A pro. 3GPP NR means the technology after TS 38.xxx Release 15. LTE / NR can also be referred to as the 3GPP system. "xxx" means the detailed number of the standard document. LTE / NR is collectively referred to as the 3GPP system. For the background technology, terms, abbreviations, etc. used in the description of the present invention, reference can be made to the matters described in the standard documents published before the present invention. For example, the following documents can be referred to.

[0016] 3GPP NR

[0017] -38.211: Physical channels and modulation

[0018] -38.212: Multiplexing and channel coding

[0019] -38.213: Physical layer procedures for control

[0020] -38.214: Physical layer procedures for data

[0021] -38.300: NR and NG-RAN Overall Description

[0022] -38.331: Radio Resource Control(RRC) protocol specification

[0023] Figure 1 illustrates the structure of a radio frame used in NR.

[0024] In NR, the transmissions of the uplink (UL) and downlink (DL) are composed of frames. A radio frame has a length of 10 ms and is defined as two 5 - ms half - frames (HF). A half - frame is defined as five 1 - ms sub - frames (SF). A sub - frame is divided into one or more slots, and the number of slots in a sub - frame depends on the SCS (Subcarrier Spacing). Each slot contains 12 or 14 OFDM(A) symbols by means of a CP (cyclic prefix). When normal CP is used, each slot contains 14 symbols. When extended CP is used, each slot contains 12 symbols. Here, the symbol can include an OFDM symbol (or a CP - OFDM symbol), an SC - FDMA symbol (or a DFT - s - OFDM symbol).

[0025] Table 1 illustrates that when normal CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per sub - frame vary according to the SCS.

[0026] [Table 1]

[0027] Table 2 illustrates that when extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per sub - frame vary according to the SCS.

[0028] [Table 2]

[0029] In the NR system, the OFDM(A) numerology (e.g., SCS, CP length, etc.) is set to be different among a plurality of cells merged into one terminal (User Equipment; UE). As a result, the (absolute time) intervals of time resources (e.g., SF, slot, or TTI) (collectively referred to as TU (Time Unit) for convenience) composed of the same number of symbols are different among the merged cells.

[0030] NR supports a number of OFDM (Orthogonal Frequency Division Multiplexing) numerologies (e.g., subcarrier spacing, SCS) to support various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in traditional cellular bands, and when the SCS is 30 kHz / 60 kHz, it supports dense-urban areas, lower latency, and wider carrier bandwidth.

[0031] The NR frequency band is defined by two types of frequency ranges (FR1 / FR2). FR1 / FR2 is configured as shown in Table 3 below. Also, FR2 means millimeter wave (mmW).

[0032]

Table 3

[0033] Figure 2 illustrates the slot structure of the NR frame.

[0034] A slot contains a plurality of symbols in the time domain. For example, in the case of normal CP, one slot contains 14 symbols, while in the case of extended CP, one slot contains 12 symbols. A carrier contains a plurality of subcarriers in the frequency domain. An RB (Resource Block) is defined as a plurality (e.g., 12) of consecutive subcarriers in the frequency domain. In the frequency domain, a plurality of RB interleaves (simply, interleaves) are defined. An interleave m ∈ [0, 1,..., M - 1] is composed of (common) RBs [m, M + m, 2M + m, 3M + m,...]. M indicates the number of interleaves. A BWP (Bandwidth Part) is defined as a plurality of consecutive RBs (e.g., physical RBs, PRBs) in the frequency domain and can correspond to one OFDM numerology (e.g., SCS (u), CP length, etc.). A carrier contains a maximum of N (e.g., 5) BWPs. Data communication is performed on the activated BWP, and only one BWP is activated for one terminal within one cell / carrier. Each element in the resource grid is called a resource element (RE), and one modulation symbol can be mapped to it.

[0035] In a wireless communication system, a terminal receives information from a base station via the downlink (DL), and the terminal transmits information to the base station via the uplink (UL). The information transmitted and received by the base station and the terminal includes data and various control information, and there are various physical channels / signals depending on the type / usage of the information they transmit and receive. A physical channel corresponds to a set of resource elements (REs) that carry information derived from the upper layer. A physical signal corresponds to a set of resource elements (REs) used by the physical layer (PHY) but does not carry information derived from the upper layer. The upper layer includes the MAC (Medium Access Control) layer, RLC (Radio Link Control) layer, PDCP (Packet Data Convergence Protocol) layer, RRC (Radio Resource Control) layer, etc.

[0036] The DL physical channels include PBCH (Physical Broadcast channel), PDSCH (Physical Downlink Shared channel), and PDCCH (Physical Downlink Control channel). The DL physical signals include DL RS (Reference Signal), PSS (Primary synchronization signal), and SSS (Secondary synchronization signal). The DL RS includes DM-RS (Demodulation RS), PT-RS (Phase-tracking RS), and CSI-RS (channel-state information RS). The UL physical channels include PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), and PUCCH (Physical Uplink Control Channel). The UL physical signals include UL RS. The UL RS includes DM-RS, PT-RS, and SRS (Sounding RS).

[0037] In the present invention, the base station is, for example, a gNodeB.

[0038] Figure 4 illustrates the SSB structure. The terminal can perform cell search, system information acquisition, beam alignment for initial connection, DL measurement, etc. based on the SSB. The SSB can be mixed with the SS / PBCH (Synchronization Signal / Physical Broadcast channel) block.

[0039] Referring to FIG. 4, the SSB consists of the PSS, SSS, and PBCH. The SSB is composed of 4 consecutive OFDM symbols. For each OFDM symbol, the PSS, PBCH, SSS / PBCH, and PBCH are transmitted. The PSS and SSS each consist of 1 OFDM symbol and 127 subcarriers, and the PBCH consists of 3 OFDM symbols and 576 subcarriers. Polar coding and QPSK (Quadrature Phase Shift Keying) are applied to the PBCH. The PBCH consists of data REs and DMRS (Demodulation Reference Signal) REs for each OFDM symbol. There are 3 DMRS REs for each RB, and there are 3 data REs between the DMRS REs.

[0040] Transmission of SSB and CORESET#0

[0041] The content described above can be applied in combination with the method proposed in the present invention described later, or supplemented to clarify the technical features of the method proposed in the present invention.

[0042] As a large number of communication devices demand greater communication capacity, the efficient utilization of limited frequency bands in next-generation wireless communication systems has become an increasingly important requirement. Cellular communication systems such as LTE / NR systems are also considering solutions to utilize unlicensed bands such as the 2.4 GHz band mainly used by conventional Wi-Fi systems and newly emerging unlicensed bands such as the 5 GHz and 60 GHz bands for traffic offloading. Basically, since unlicensed bands assume a method of performing wireless transmission and reception through competition among communication nodes, each communication node is required to perform channel sensing before transmitting a signal to confirm that no other communication node is transmitting a signal. For convenience, such an operation is called LBT (listen before talk) or CAP (channel access procedure), and in particular, the operation of confirming whether or not another communication node is transmitting a signal is called CS (carrier sensing), and the case where it is determined that no other communication node is transmitting a signal is defined as CCA (clear channel assessment) being confirmed.

[0043] In the following description, LBT can be replaced with CAP. eNB / gNB and UE in the LTE / NR system also need to perform LBT for signal transmission in the unlicensed band (for convenience, called the U-band). When the eNB / gNB and UE in the LTE / NR system transmit a signal, other communication nodes such as Wi-Fi (or WiGig (Wireless Gigabit Alliance) such as 802.11ad / ay) also perform LBT so as not to cause interference. For example, in the Wi-Fi standard (802.11ac), the CCA threshold is defined as -62 dBm for non-Wi-Fi signals and -82 dBm for Wi-Fi signals. This means that, for example, when a STA or AP receives a non-Wi-Fi signal with a power of -62 dBm or higher, it does not transmit a signal so as not to cause interference.

[0044] The 3GPP Rel-15 (release-15) NR system defines operations in bands below 52.6 GHz. In the future, discussions are underway to enable the NR system to also operate in licensed and / or unlicensed bands in the 60 / 70 GHz bands (specifically, frequency bands above 52.6 GHz, or frequency bands from above 52.6 GHz to below 71 GHz) in future releases. In the present invention, for the sake of convenience, this band is referred to as FR2-2 (frequency range 2-2), and an initial connection method including SS / PBCH block transmission and reception, and SIB1 PDCCH / PDSCH transmission and reception on the FR2-2 frequency band is proposed. In addition, an initial connection method including SS / PBCH block transmission and reception, and SIB1 PDCCH / PDSCH transmission and reception in FR1 (frequency band up to 7.125 GHz) is proposed.

[0045] In addition, the methods described below can be similarly applied to the aforementioned NR system (licensed band) or shared spectrum, and it goes without saying that the technical ideas proposed in the present invention can be modified or replaced according to the terms, expressions, structures, etc. defined in each system so that they can be embodied in the system.

[0046] Table 4 is the content excerpted from the 13th "UE procedure for monitoring Type0-PDCCH CSS sets" of 3GPP TS 38.213 V17.1.0. Table 5 is Table 13-16, showing "Mapping between the combination of K_SSB and controlResourceSetZero and searchSpaceZero in pdcch-ConfigSIB1 to for FR1", and Table 6 is Table 13-17, showing "Mapping between the combination of K_SSB and controlResourceSetZero and searchSpaceZero in pdcch-ConfigSIB1 to N_GSCN^Offset for FR2".

[0047] Referring to Tables 4 to 6, for FR1 (frequency band up to 7.125 GHz) and FR2 (for example, frequency band 24.25 GHz and above), if the first SSB detected by the terminal is an NCD-SSB (non-cell defining SSB), information about the CD-SSB (cell defining SSB) in the frequency region around the SSB is provided. The NCD-SSB means an SSB that does not provide a valid configuration for the type0-PDCCH CSS set and CORESET #0 or an SSB that does not provide MO (monitoring occasion) information for the PDCCH that schedules the SIB1 PDSCH. The CD-SSB means an SSB that provides a valid configuration for the type0-PDCCH CSS set and CORESET #0 or an SSB that provides MO information regarding the PDCCH that schedules the SIB1 PDSCH.

[0048] [Table 4] JPEG0007697131000005.jpg60167

[0049] [Table 5]

[0050] [Table 6]

[0051] Specifically, in FR1, when the k_SSB value is 24 or more and 29 or less, or in FR2, when the k_SSB value is 12 or 13, an offset value of N_GSCN^Offset is applied from the first SSB (i.e., NCD-SSB). The terminal is signaled that there is a CD-SSB with the synchronization raster closest to the GSCN to which the offset value is applied centered around the first SSB.

[0052] Also, when the k_SSB value is 31 in FR1 or the k_SSB value is 15 in FR2, the terminal is signaled that there is no CD-SSB in the range of N_GSCN^Reference - N_GSCN^Start and N_GSCN^Reference - N_GSCN^End with respect to the first SSB (i.e., NCD-SSB).

[0053] Table 7 below corresponds to "Applicable SS raster entries per operating band" excerpted from TS 38.101-1 v17.5.0. Among the NR operating bands of FR1, for the n96 band, since the GSCN range is 9531 - 10363 (i.e., an 832 interval), the GSCN range is larger than 768, which is the maximum interval notified as the GSCN offset in Table 5 above. Therefore, the signaling shown in Table 4 needs to be enhanced. For reference, the n96 band is a band defined in the range of 5925 MHz - 7125 MHz and corresponds to an unlicensed band. Therefore, it corresponds to a band for operation with shared spectrum channel access.

[0054]

Table 7

[0055] On one hand, for FR2-2, two separate frequency bands are defined for licensed and unlicensed band uses. For licensed band operation, n264 is defined, corresponding to a frequency band of 66 GHz to 71 GHz. For unlicensed band operation, n263 is defined, corresponding to a frequency band of 57 GHz to 71 GHz.

[0056] For n264, as an example, GSCNs such as those in Table 8 below are defined. Since the GSCN range is approximately 24674 to 24959 (i.e., a 285 interval), the GSCN range is larger than 256, which is the maximum interval notified as the GSCN offset in Table 6 above. Therefore, the signaling shown in Table 4 needs to be improved.

[0057] In this invention, licensed band operation is used as operation without shared spectrum channel access. Unlicensed band operation is used as operation with shared spectrum channel access.

[0058]

Table 8

[0059] Similarly, for n263, as an example, GSCNs such as those in Table 9 below are defined. Since the GSCN range is approximately 24153 to 24956 (i.e., an 803 interval), the GSCN range is larger than 256, which is the maximum interval notified as the GSCN offset in Table 6 above. Therefore, the signaling shown in Table 4 needs to be improved.

[0060]

Table 9

[0061] Therefore, in this invention, a method for notifying the position of NCD-SSB or CD-SSB is proposed for the licensed band operation on FR1 (e.g., for n96) and / or the licensed band operation or unlicensed band operation on FR2-2 (e.g., for n263 or n264).

[0062] 1) Receiver (Entity A, e.g., UE):

[0063] [Method #1] For the licensed band operation on FR1 (e.g., for n96) and / or the licensed band operation or unlicensed band operation on FR2-2 (e.g., for n263 or n264), when the "offset between GSCNs from NCD-SSB to CD-SSB" value that can be indicated increases, all or most of the GSCNs within at least the same band are indicated by the increased offset.

[0064] 1-1. As a first method, for the first SSB belonging to the n96 band or the range of 5925 MHz to 7125 MHz, when the k_SSB value is a value between 24 and 29 (since the n96 band belongs to FR1), when applying an offset value of N_GSCN^Offset from the first SSB (i.e., NCD-SSB), the formula of N_GSCN^Reference + M_GSCN^step·N_GSCN^Offset is applied. At this time, the M_GSCN^step value is predefined as a value greater than 1. As an example, considering that the GSCN range of n96 is from 9531 to 10363 with an interval of 832, and the maximum interval notified as the GSCN offset in Table 5 above is 768, M_GSCN^step is defined as M_GSCN^step = 2, which is the ceiling[832 / 768] value.

[0065] Alternatively, the corresponding method is applied to the first SSB corresponding to the n96 band or the GSCN value belonging to the range of 5925 MHz to 7125 MHz. Specifically, when the GSCN value corresponding to the second SSB is between 9531 and 10363, the first method (i.e., the method of defining an M_GSCN^step value greater than 1, for example, M_GSCN^step = 2) is applied.

[0066] As another method, signaling that enables indication or information transmission for all GSCNs within at least the same band is introduced by changing some of the values in Table 5 for the "first SSB belonging to the n96 band or the range of 5925 MHz to 7125 MHz" or for the "first SSB corresponding to the GSCN value belonging to the n96 band or the range of 5925 MHz to 7125 MHz". For example, when k_SSB is 26, some of the M_GSCN^step values are interpreted differently, and the maximum value of N_GSCN^offset is indicated up to 832 instead of 768. Or, when k_SSB is 29, some of the N_GSCN^offset values are interpreted differently, and the minimum value of N_GSCN^offset is indicated down to -832 instead of -768. Or, when k_SSB is 30, 769 to 832 and -769 to -832 are indicated by all or part of the reserved state.

[0067] 1-2. As a second method, for the second SSB belonging to the n264 band or in the range of 66000 MHz to 71000 MHz (or belonging to FR2-2), when the k_SSB value is 12 or 13 (since the n264 band belongs to FR2), when applying an offset value of only N_GSCN^Offset from the first SSB (i.e., NCD-SSB), the formula of N_GSCN^Reference + M_GSCN^step·N_GSCN^Offset is applied. At this time, the M_GSCN^step value may be predefined as a value greater than 1. As an example, considering that the GSCN range of n264 is 24674 to 24959, that is, at an interval of 285, and the maximum interval known as the offset of GSCN in Table 6 above is 256, the M_GSCN^step value is the ceiling[285 / 256] value, and M_GSCN^step = 2 is defined. Or, according to Table 8, the step size defined for each SSB SCS, that is, M_GSCN^step = 3 (for 120 kHz) or M_GSCN^step = 12 (for 480 kHz) or M_GSCN^step = 6 (for 960 kHz) is defined.

[0068] Alternatively, the corresponding method is applied to the first SSB belonging to the n264 band or the GSCN value in the range of 66000 MHz to 71000 MHz. Specifically, when the GSCN value corresponding to the first SSB is between 24674 and 24959, the second method (i.e., defining an M_GSCN^step value greater than 1, for example, M_GSCN^step = 2, or defining different M_GSCN^step values for each SCS) is applied. For example, the GSCN value corresponding to n264 varies according to the SCS of the first SSB. If the SCS of the first SSB is 120 kHz, the second method is applied when the GSCN value corresponding to the first SSB is between 24674 and 24959. If the SCS of the first SSB is 480 kHz, the second method is applied when the GSCN value corresponding to the first SSB is between 24677 and 24953. If the SCS of the first SSB is 960 kHz, the second method is applied when the GSCN value corresponding to the first SSB is between 24680 and 24950.

[0069] As another method, signaling that enables indication or information transmission for all GSCNs within at least the same band is introduced by changing some of the values in Table 6 for the "first SSB belonging to the n264 band or in the range of 66000 MHz to 71000 MHz" or for the "first SSB corresponding to the GSCN value belonging to the n264 band or in the range of 66000 MHz to 71000 MHz". For example, when k_SSB is 12, some of the N_GSCN^Offset values are interpreted differently, and the maximum value of N_GSCN^Offset is indicated up to 285 instead of 256. Or, when k_SSB is 13, some of the N_GSCN^Offset values are interpreted differently, and the minimum value of N_GSCN^Offset is indicated down to -285 instead of -256. Or, when k_SSB is 14, all or part of the reserved state is utilized to indicate 257 to 285 and -257 to -285.

[0070] 1-3. As a third method, when the k_SSB value is 12 or 13 for the first SSB belonging to the n263 band or the range of 57000 MHz to 71000 MHz (since the n263 band belongs to FR2), when applying an offset value of only N_GSCN^Offset from the first SSB (i.e., NCD-SSB), the formula of N_GSCN^Reference + M_GSCN^step·N_GSCN^Offset is applied. At this time, the M_GSCN^step value is predefined as a value greater than 1. As an example, considering that the GSCN range of n263 is 24153 to 24959, that is, an interval of 803, and the maximum interval known as the offset of GSCN in Table 6 above is 256, M_GSCN^step is defined as M_GSCN^step = 4, which is the ceiling[803 / 256] value. Or, different step sizes are defined according to the SCS of the SSB. As an example, M_GSCN^step = 5 or 6 (for 120) kHz, or M_GSCN^step = 24 (for 480 kHz), or M_GSCN^step = 12 (for 960 kHz) is defined.

[0071] Or, the corresponding method is applied to the first SSB corresponding to the GSCN value belonging to the n263 band or the range of 57000 MHz to 71000 MHz. Specifically, when the GSCN value corresponding to the first SSB is in the range of 24153 to 24956, the corresponding method (i.e., defining an M_GSCN^step value greater than 1, for example, defining M_GSCN^step = 4, or defining different M_GSCN^step values for each SCS) is applied. For example, the GSCN value corresponding to n263 varies according to the SCS of the first SSB. If the SCS of the first SSB is 120 kHz, the third method is applied when the GSCN value corresponding to the first SSB is in the range of 24153 to 24960. If the SCS of the first SSB is 480 kHz, the third method is applied when the GSCN value corresponding to the first SSB is in the range of 24155 to 24958. If the SCS of the first SSB is 960 kHz, the third method is applied when the GSCN value corresponding to the first SSB is in the range of 24158 to 24954.

[0072] As another method, by changing some of the values in Table 6 for the "first SSB belonging to the n263 band or the range of 57000 MHz to 71000 MHz" or for the "first SSB corresponding to the GSCN value belonging to the n263 band or the range of 57000 MHz to 71000 MHz", signaling that enables indication or information transmission for all GSCNs within at least the same band is introduced. For example, when k_SSB is 12, some or all of the N_GSCN^Offset values are interpreted as different, and the maximum value of N_GSCN^Offset is indicated up to [803 or 807] instead of 256. Or, when k_SSB is 13, some of the N_GSCN^Offset values are interpreted as different, and the minimum value of N_GSCN^Offset is indicated up to [-803 or -807] instead of -256. Or, when k_SSB is 14, all or part of the reserved state is utilized to indicate 257 to [803 or 807] and -257 to [-803 or -807].

[0073] Furthermore, it should be considered that since n263 and n264 overlap, if independent rules are defined for each band, when the first SSB discovered from the overlapping frequency band is an NCD-SSB, the terminal may be confused as to which of the above second method or third method to apply. Therefore, taking this into account, in the overlapping area of n263 and n264, the second method is applied, and in the non-overlapping area, the third method (or, as follows, the rules modified from the third method) is applied.

[0074] Specifically, for the first SSB belonging to the n264 band or the range of 66000 MHz to 71000 MHz (or belonging to FR2-2), when the k_SSB value is 12 or 13 (since the corresponding band belongs to FR2), when applying an offset value of only N_GSCN^Offset from the first SSB (i.e., NCD-SSB), the formula of N_GSCN^Reference + M_GSCN^step·N_GSCN^Offset is applied. At this time, the M_GSCN^step value is predefined as a value greater than 1. As an example, considering that the GSCN range of n264 is 24674 to 24959, that is, at an interval of 285, and the maximum interval notified as the GSCN offset in Table 6 above is 256, the M_GSCN^step value is defined as M_GSCN^step = 2, which is the ceiling[285 / 256] value. Or, according to Table 8 above, the step size defined for each SSB SCS, that is, M_GSCN^step = 3 (for 120 kHz), or M_GSCN^step = 12 (for 480 kHz), or M_GSCN^step = 6 (for 960 kHz) is defined.

[0075] Alternatively, for the first SSB belonging to the range of 66000 MHz to 71000 MHz where the n264 band and the n263 band overlap, corresponding to the GSCN value, the above second method is applied. Specifically, when the GSCN value corresponding to the first SSB is between 24674 and 24959, the second method (i.e., the M_GSCN^step value greater than 1, for example, defining M_GSCN^step = 2, or defining different M_GSCN^step values for each SCS) is applied. The corresponding GSCN value varies according to the SCS of the first SSB. If the SCS of the first SSB is 120 kHz, the second method is applied when the GSCN value corresponding to the first SSB is between 24674 and 24959. If the SCS of the first SSB is 480 kHz, the second method is applied when the GSCN value corresponding to the first SSB is between 24677 and 24953. If the SCS of the first SSB is 960 kHz, the second method is applied when the GSCN value corresponding to the first SSB is between 24680 and 24950.

[0076] As another method, for the "first SSB belonging to the range of 66000 MHz to 71000 MHz where the n264 band and the n263 band overlap" or for the "first SSB corresponding to the GSCN value belonging to the range of 66000 MHz to 71000 MHz where the n264 band and the n263 band overlap", by changing some of the values in Table 6, signaling is introduced that enables indication or information transmission for all GSCNs within at least the same band. For example, when k_SSB is 12, some of the N_GSCN^Offset values are interpreted differently, and the maximum value of N_GSCN^Offset is indicated up to 285 instead of 256. Or, when k_SSB is 13, some of the N_GSCN^Offset values are interpreted differently, and the minimum value of N_GSCN^Offset is indicated down to -285 instead of -256. Or, when k_SSB is 14, by utilizing all or part of the reserved state, 257 to 285 and -257 to -285 are indicated.

[0077] Also, for the n263 band that does not overlap with the n264 band or the first SSB belonging to the range of 57000 MHz to 66000 MHz, when the k_SSB value is 12 or 13 (since the corresponding band belongs to FR2), when applying an offset value of only N_GSCN^Offset from the first SSB (i.e., NCD-SSB), the mathematical formula of N_GSCN^Reference + M_GSCN^step·N_GSCN^Offset is applied. At this time, the M_GSCN^step value is predefined as a value greater than 1. As an example, considering that the GSCN range of n263 is 24153 to 24959, that is, an interval of 803, and the maximum interval notified as the offset of GSCN in Table 6 above is 256, M_GSCN^step is the ceiling[803 / 256] value, and M_GSCN^step = 4 is defined. Or, different step sizes according to the SCS of the SSB, for example, M_GSCN^step = 5 or 6 (for 120 kHz), or M_GSCN^step = 24 (for 480 kHz), or M_GSCN^step = 12 (for 960 kHz) are defined.

[0078] As another example, considering that the GSCN range of the n263 band that does not overlap with n264 is 24153 to 24680, that is, an interval of approximately 527, and the maximum interval notified as the offset of GSCN in Table 6 above is 256, M_GSCN^step is the ceiling[527 / 256] value, and M_GSCN^step = 3 is defined. Or, different step sizes according to the SCS of the SSB, for example, M_GSCN^step = 5 or 6 (for 120 kHz), or M_GSCN^step = 24 (for 480 kHz), or M_GSCN^step = 12 (for 960 kHz) are defined.

[0079] Alternatively, the corresponding method is applied to a first SSB corresponding to an n263 band that does not overlap with the n264 band or a GSCN value belonging to the range of 57000 MHz to 66000 MHz. Specifically, when the GSCN value corresponding to the first SSB is 24153 to 24674 or 24680, the corresponding method (i.e., defining an M_GSCN^step value greater than 1, for example, M_GSCN^step = 3, or M_GSCN^step = 4, or defining different M_GSCN^step values for each SCS) is applied. The corresponding GSCN value for the corresponding band varies according to the SCS of the first SSB. For example, if the SCS of the first SSB is 120 kHz, the corresponding method is applied when the GSCN value corresponding to the first SSB is 24153 to 24674. If the SCS of the first SSB is 480 kHz, the corresponding method is applied when the GSCN value corresponding to the first SSB is 24155 to 24677. If the SCS of the first SSB is 960 kHz, the corresponding method is applied when the GSCN value corresponding to the first SSB is 24158 to 24680.

[0080] As another method, for the "n263 band that does not overlap with the n264 band or the first SSB belonging to the range of 57000 MHz to 66000 MHz" or for the "n263 band that does not overlap with the n264 band or the first SSB corresponding to the GSCN value belonging to the range of 57000 MHz to 66000 MHz", by changing some of the values in Table 6, signaling that can indicate or transmit information for all GSCNs within at least the same band is introduced. For example, when k_SSB is 12, some or all of the N_GSCN^step values are interpreted as different, and the maximum value of N_GSCN^step is not 256 but is indicated up to [803 or 807] or 527. Or, when k_SSB is 13, some of the N_GSCN^step values are interpreted as different, and the minimum value of N_GSCN^step is not -256 but is indicated up to [-803 or -807] or -527. Or, when k_SSB is 14, by utilizing all or part of the reserved state, 257 to [803 or 807] (or 257 to 527) and -257 to [-803 or -807] (or -257 to -527) are indicated.

[0081] As another method for the region where n263 and n264 overlap, it is indicated from the MIB whether to apply the above second method or the third method. As shown in Table 11 below, the MIB indicates that the N_SSB^QCL value is 32 or 64. The indication that the N_SSB^QCL value is 32 means that the base station has increased the SSB transmission opportunity for unlicensed band operation. Therefore, when the N_SSB^QCL value is indicated as 32, in the region where n263 and n264 overlap (when the first SSB found in the corresponding frequency region is NCD-SSB), the above third method (the method corresponding to unlicensed band operation) is applied, and when the N_SSB^QCL value is indicated as 64, in the region where n263 and n264 overlap (when the first SSB found in the corresponding frequency region is NCD-SSB), the above second method (the method corresponding to licensed band operation) is applied.

[0082]

Table 10

[0083]

Table 11

[0084] 1-4. As a fourth method, different M_GSCN^step values are applied according to whether the GSCN corresponding to the first SSB is the GSCN value defined for n263 or the GSCN value defined for n264. As an example, for n264, the GSCN value is defined as shown in Table 13 (i.e., the GSCN value for 120 kHz SSB starts from 24674 with an interval of 3, and the GSCN value for 480 kHz SSB starts from 24677 with an interval of 12), and for n263, the GSCN value is defined by a mathematical formula as shown in Table 14. If the GSCN corresponding to the first SSB is the GSCN value defined for n263, M_GSCN^step is defined as 4. Or, different step sizes are defined according to the SCS of the SSB. As an example, M_GSCN^step = 5 or 6 (for 120 kHz), or M_GSCN^step = 24 (for 480 kHz), or M_GSCN^step = [12 or 6] (for 960 kHz). On the other hand, if the GSCN corresponding to the first SSB is the GSCN value defined for n264, M_GSCN^step is defined as [2 or 3]. Or, according to Table 8 above, the step size defined for each SCS of the SSB, i.e., M_GSCN^step = 3 (for 120 kHz), or M_GSCN^step = 12 (for 480 kHz), or M_GSCN^step = 6 (for 960 kHz).

[0085]

Table 12

[0086]

Table 13

[0087] [Table 14]

[0088] As an example, the above fourth method includes the content of Table 15 as follows.

[0089] [Table 15]

[0090] 1-5. As a fifth method, when the GSCN corresponding to the first SSB belongs to FR2-2, a specific M_GSCN^step value is applied. This simplifies the implementation of the terminal by not separately defining a different value according to the SCS of the SSB. As an example, M_GSCN^step is defined as 3. Or, the step size defined for each SCS of the SSB, i.e., M_GSCN^step = 3 (for 120 kHz), or M_GSCN^step = 12 (for 480 kHz) is defined. Or, commonly for SCS, M_GSCN^step is defined as 6.

[0091] As an example, the above fifth method includes the content of Table 16 as follows.

[0092] [Table 16]

[0093] 1-6. As a sixth method, when the GSCN corresponding to the first SSB belongs to FR2-2, to solve the problem that the GSCN range becomes larger than 256, which is the maximum interval notified as the offset of GSCN in Table 6 above, all or part of the reserved states in Table 6 are utilized. As an example, when k_SSB is 14, the 256 reserved states are utilized, and the offsets from [256 + 1] to [256 + 256] are signaled. Or, when k_SSB is 14, the 256 reserved states are utilized, and the offsets from [-256 - 128] to [-256 - 1] and from [256 + 1] to [256 + 128] are signaled. As an example, as shown in Tables 17 to 19 below, considering that the GSCN in FR2-2 is commonly at intervals that are multiples of 3, it is desirable that the offset values corresponding to the reserved states be composed of multiples of 3. Specifically, when k_SSB is 14, the 256 reserved states are utilized, and the offsets from [255 + 1 * 3] to [255 + 256 * 3] (or a part thereof) are signaled. Or, when k_SSB is 14, the 256 reserved states are utilized, and the offsets from [-255 - 128 * 3] to [-255 - 1 * 3] and from [255 + 1 * 3] to [255 + 128 * 3] (or a part thereof) are signaled. Tables 17 to 19 are part of 3GPP TS 38.101-2 V17.6.0. Table 18 corresponds to Table 5.4.3.3-1: Applicable SS raster entries per operating band, and Table 19 corresponds to Table 5.4.3.3-2: Allowed GSCN for operation in band n263 for 120 kHz and 480 kHz.

[0094]

Table 17

[0095]

Table 18

[0096]

Table 19

[0097] 1-7. As a seventh method, when the GSCN corresponding to the first SSB belongs to FR2-2, depending on the SCS of the SSB, the N_GSCN^Offset value is interpreted to be different. According to Tables 17 to 19, when the SCS of the SSB is 120 kHz, the interval of GSCNs is 6 or 3 (the interval becomes 3 instead of 6 every 18 times), when the SCS of the SSB is 480 kHz, the interval of GSCNs is 24 or 12 (the interval becomes 12 instead of 24 every 18 times), and when the SCS of the SSB is 960 kHz, it can be seen that the interval of GSCNs is 6. That is, when the N_GSCN^Offset value K is indicated, the terminal recognizes that there is an SSB at the K-th GSCN from the current SSB's GSCN (i.e., N_GSCN^Reference) (based on Tables 17 to 19). As an example, when 12 is signaled as the k_SSB value from a 480 kHz SSB and 3 is signaled as the N_GSCN^Offset value, when the GSCN of that SSB corresponds to N = 10 in Table 19, the GSCN position notified by that SSB is the position corresponding to N = (10 + 3) in Table 19.

[0098] [Method #2] A method of interpreting for an indication that there is no CD-SSB within a specific GSCN range for the operation of licensed or unlicensed bands on FR2-2 (e.g., for n263 or n264).

[0099] When the GSCN corresponding to the first SSB belongs to FR2-2, rules are defined such that the interpretations of N_GSCN^Start and / or N_GSCN^End in Table 4 are different. For example, when the k_SSB value is indicated as 15 from the SSB in the FR2-2 band, and the controlResourceSetZero value in pdcch-ConfigSIB1 is K1 and the searchSpaceZero value is K2, the terminal shall consider the N_GSCN^Start value as X*K1 and the N_GSCN^End value as Y*K1. At this time, (X, Y) is a specific value (e.g., (3, 3) or (6, 6)), or is defined as different values according to the SCS of the SSB (e.g., (3, 3) for 120kHz, (12, 12) for 480kHz, (6, 6) for 960kHz), regardless of the SCS of the SSB that can be transmitted from FR2-2.

[0100] 2) Operations between Receiver and Transmitter

[0101] (According to the proposal of this invention) A base station operating in the FR1 or FR2-2 band indicates a GSCN offset value when the first SSB is an NCD-SSB. The terminal grasps the positions of the CD-SSBs around the first SSB by recognizing the corresponding GSCN offset value by the method proposed in the above method #1.

[0102] On the other hand, the content of this invention is not limited to the transmission and reception of uplink and / or downlink signals. For example, the content of this invention can also be applied to direct communication between terminals. Also, the base station in this invention is not only a Base Station but also a concept including a relay node. For example, the operation of the base station in this invention may be performed by a base station (Base Station) or may be performed by a relay node.

[0103] An example of the above-described proposed method can also be included as one of the implementation methods of the present invention, and it is an obvious fact that it is regarded as a kind of proposed method. Further, the above-described proposed method may be implemented independently, or may be implemented in the form of a combination (or merger) of some proposed methods. The information on whether to apply the above-described proposed method (or the information on the rules of the above-described proposed method) may be defined by a rule such that the base station notifies the terminal, or the transmitting terminal notifies the receiving terminal, by a predefined signal (for example, a physical layer signal or a higher layer signal).

[0104] Embodiment

[0105] FIGS. 5 and 6 are flowcharts showing a signal transmission / reception method according to an embodiment of the present invention.

[0106] Referring to FIG. 5, an embodiment of the present invention includes steps of being executed by a terminal, sensing a first SSB (S501); determining the closest GSCN of a second SSB (S503); and receiving the second SSB (S505). Referring to FIG. 6, another embodiment of the present invention includes steps of being executed by a base station, transmitting a first SSB (S601) and transmitting a second SSB (S603).

[0107] In addition to the operations of FIGS. 5 and / or 6, any one or more of the operations described in "Transmission of SSB and CORESET♯0" may be further performed.

[0108] For example, referring to Table 16 in relation to step S503, the UE determines that a CORESET for Type0-PDCCH CSS set is not present. Based on this determination, the UE may determine the nearest GSCN of a second SS / PBCH block having a CORESET for an associated Type0-PDCCH CSS set.

[0109] The synchronization raster indicates the frequency positions of SSBs that can be used by the UE for acquiring system information when there is no explicit signaling for the positions of the SSBs. The frequency positions of the SSBs are defined by the corresponding GSCNs. Thus, in relation to step S505, the UE can receive the second SSB based on the frequency position of the second SSB corresponding to the nearest GSCN of the second SSB.

[0110] Since the second SSB has a CORESET for the type 0-PDCCH CSS set, the terminal performs cell search based on the second SSB. Here, if k_SSB is 24 to 29 in the FR1 band or 12 to 13 in the FR2 band, the GSCN of the second SSB is determined as N_GSCN^Reference + N_GSCN^size * N_GSCN^Offset. k_SSB is the subcarrier offset that indicates the interval from the lowest subcarrier in the common resource block to the lowest subcarrier of the first SSB (The quantity k_SSB is the subcarrier offset from subcarrier 0 in common resource block N_CRB^SSB to subcarrier 0 of the SS / PBCH block). If k_SSB is a value other than 24 to 29 in the FR1 band or a value other than 12 to 13 in the FR2 band, the frequency position of the SSB is derived based on the corresponding k_SSB value. If k_SSB is 24 to 29 in the FR1 band or 12 to 13 in the FR2 band, k_SSB does not directly inform the frequency position of the SSB, and the frequency position of the SSB is derived by the GSCN determined based on N_GSCN^Reference + N_GSCN^size * N_GSCN^Offset.

[0111] N_GSCN^Reference is the GSCN of the first SS / PBCH block (N_GSCN^Reference is the GSCN of the first SS / PBCH block). N_GSCN^size is the step size applied to N_GSCN^Offset. N_GSCN^Offset is the GSCN offset determined based on Tables 5 and 6.

[0112] Therefore, in step S503, the closest GSCN is determined based on (i) the GSCN of the first SSB, (ii) the step size, and (iii) the GSCN offset.

[0113] The step size is determined to be 1 in the FR1 and FR2-1 bands and 3 in the FR2-2 band. Since FR1, FR2-1, and FR2-2 are the frequency bands where the first SSB is detected, the step size is determined based on the frequency band where the first SSB is detected.

[0114] The GSCN offset is determined by referring to Table 5 if the frequency band where the first SSB is detected is FR1, and Table 6 if it is FR2. Referring to Tables 5 and 6, the GSCN offset is determined by k_SSB and 16*controlResourceSetZero + searchSpaceZero. k_SSB is the subcarrier offset described above. controlResourceSetZero is an RRC parameter for configuring CORESET #0 of the initial BWP (The IE ControlResourceSetZero is used to configure CORESET#0 of the initial BWP), and its value ranges from 0 to 15. searchSpaceZero is an RRC parameter for determining the common search space with ID #0 (The IE SearchSpaceZero is used to configure SearchSpace#0 of the initial BWP), and its value ranges from 0 to 15.

[0115] Referring to Tables 8 and 9, generally, the step size varies based on SCS rather than the frequency band. On the other hand, in the embodiments of this invention, the step size is determined identically for 120 kHz SCS and 480 kHz SCS. Referring to the GSCN range in Table 19, the GSCN range at 120 kHz SCS is 24156 to 24957, which is 801, and it is larger than 768 which is the value obtained by multiplying the maximum value of the GSCN offset in Table 6 by the step size 3 (since the GSCN range at 480 kHz SCS is 24162 to 24930, which is 768, and is the same as the value obtained by multiplying the maximum value of the GSCN offset by the step size). Therefore, with a step size of 3, it is possible that not all of the GSCN range for 120 kHz SCS can be indicated. However, if the step size between SCSs is determined identically, most of the GSCN ranges can be indicated, and the processing of the terminal can be simplified. Therefore, considering the trade-off relationship, it is more effective than the method of setting different step sizes for each SCS.

[0116] From the perspective of the base station, the first SSB transmitted by the base station in step S601 is an SSB for which there is no CORESET for the type 0-PDCCH CSS set. The SSB transmitted by the base station in step S603 is an SSB having a CORESET for the type 0-PDCCH CSS set. The method for determining the closest GSCN of the second SSB is the same as the method described in relation to the operation of the terminal in this embodiment.

[0117] In addition to the operations described in relation to FIG. 5, one or more of the operations described by FIGS. 1 to 4 and / or the operations described in "Transmission of SSB and CORESET #0" may be further executed in combination.

[0118] Example of communication system to which the present invention is applied

[0119] Without being limited thereto, the various descriptions, functions, procedures, proposals, methods and / or flowcharts of the present invention disclosed in this specification can be applied to various fields that require wireless communication / connection between devices (for example, 5G).

[0120] The following will be described more specifically with reference to the drawings. In the following figures / descriptions, the same reference numerals exemplify the same or corresponding hardware blocks, software blocks or functional blocks unless otherwise specifically mentioned.

[0121] FIG. 7 illustrates a communication system 1 applied to the present invention.

[0122] Referring to FIG. 7, the communication system 1 applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device means a device that communicates using a wireless connection technology (for example, 5G NR (New RAT), LTE (Long Term Evolution)), and is also referred to as a communication / wireless / 5G device. Without being limited thereto, the wireless devices include a robot 100a, vehicles 100b-1, 100b-2, XR (Extended Reality) devices 100c, hand-held devices 100d, home appliances 100e, IoT (Internet of Thing) devices 100f, and AI servers / devices 400. For example, the vehicles include vehicles equipped with a wireless communication function, autonomous driving vehicles, vehicles capable of vehicle-to-vehicle communication, etc. Here, the vehicles include UAVs (Unmanned Aerial Vehicles) (for example, drones). The XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, and are embodied in the form of HMDs (Head-Mounted Devices), HUDs (Head-Up Displays) equipped in vehicles, TVs, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. The hand-held devices include smartphones, smart pads, wearable devices (for example, smartwatches, smart glasses), computers (for example, notebook computers, etc.). The home appliances include TVs, refrigerators, washing machines, etc. The IoT devices include sensors, smart meters, etc. For example, the base station and the network can also be embodied by wireless devices, and a specific wireless device 200a can also operate as a base station / network node for other wireless devices.

[0123] Wireless devices 100a to 100f are connected to network 300 via base station 200. AI (Artificial Intelligence) technology is applied to wireless devices 100a to 100f, and wireless devices 100a to 100f are connected to AI server 400 via network 300. Network 300 is configured using a 3G network, 4G (e.g., LTE) network, or 5G (e.g., NR) network, etc. Wireless devices 100a to 100f can communicate with each other via base station 200 / network 300, but can also communicate directly without going through the base station / network (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Also, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0124] Wireless communications / connections 150a, 150b, and 150c are performed between wireless devices 100a to 100f / base station 200 and between base stations 200 / 200. Here, the wireless communications / connections are performed by various wireless connection technologies such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), and communication 150c between base stations (e.g., relay, IAB (Integrated Access Backhaul)) (e.g., 5G NR). Through wireless communications / connections 150a, 150b, and 150c, wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to / from each other. For example, wireless communications / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. For this purpose, based on various proposals of the present invention, any one of the setting process of various configuration information for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation process is performed.

[0125] Example of wireless device to which the present invention is applied

[0126] FIG. 8 illustrates a wireless device applicable to the present invention.

[0127] Referring to FIG. 8, the first wireless device 100 and the second wireless device 200 transmit and receive wireless signals by various wireless connection technologies (e.g., LTE, NR). Here, [the first wireless device 100, the second wireless device 200] corresponds to [the wireless device 100x, the base station 200] and / or [the wireless device 100x, the wireless device 100x] in FIG. 7.

[0128] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and further includes one or more transceivers 106 and / or one or more antennas 108. The processor 102 controls the memory 104 and / or the transceiver 106, and is configured to implement the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. For example, after the processor 102 processes the information in the memory 104 to generate a first information / signal, the transceiver 106 transmits a wireless signal including the first information / signal. Also, after the processor 102 receives a wireless signal including a second information / signal by the transceiver 106, the information obtained from the signal processing of the second information / signal is stored in the memory 104. The memory 104 is connected to the processor 102 and stores various information related to the operation of the processor 102. For example, the memory 104 stores software code including instructions for performing part or all of the processes controlled by the processor 102, or for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. Here, the processor 102 and the memory 104 are part of a communication modem / circuit / chip designed to implement wireless communication technologies (e.g., LTE, NR). The transceiver 106 is connected to the processor 102 and transmits and / or receives wireless signals through one or more antennas 108. The transceiver 106 includes a transmitter and / or a receiver. The transceiver 106 can also be used interchangeably with an RF (radio Frequency) unit. In the present invention, the wireless device can also mean a communication modem / circuit / chip.

[0129] The second wireless device 200 includes one or more processors 202 and one or more memories 204, and further includes one or more transceivers 206 and / or one or more antennas 208. The processor 202 controls the memory 204 and / or the transceiver 206, and is configured to implement the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. For example, after the processor 202 processes the information in the memory 204 to generate third information / signals, the transceiver 206 transmits a wireless signal including the third information / signals. Also, after the processor 202 receives a wireless signal including fourth information / signals by the transceiver 206, the information obtained from the signal processing of the fourth information / signals is stored in the memory 204. The memory 204 is connected to the processor 202 and stores various information related to the operation of the processor 202. For example, the memory 204 stores software code including instructions for performing some or all of the processes controlled by the processor 202, or for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. Here, the processor 202 and the memory 204 are part of a communication modem / circuit / chip designed to implement wireless communication technologies (e.g., LTE, NR). The transceiver 206 is connected to the processor 202 and transmits and / or receives wireless signals through one or more antennas 208. The transceiver 206 includes a transmitter and / or a receiver. The transceiver 206 can also be used interchangeably with an RF unit. In the present invention, the wireless device can also mean a communication modem / circuit / chip.

[0130] Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers are implemented by one or more processors 102 and 202. For example, one or more processors 102 and 202 implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102 and 202 generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (Service Data Units) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. One or more processors 102 and 202 generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. One or more processors 102 and 202 generate a signal (e.g., a baseband signal) including a PDU, an SDU, a message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this specification, and provide it to one or more transceivers 106 and 206. One or more processors 102 and 202 receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and can obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification.

[0131] One or more processors 102, 202 are also referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors 102, 202 are implemented by hardware, firmware, software, or a combination thereof. As an example, one or more ASICs (Application Specific Integrated Circuits), one or more DSPs (Digital Signal Processors), one or more DSPDs (Digital Signal Processing Devices), one or more PLDs (Programmable Logic Devices), or one or more FPGAs (Field Programmable Gate Arrays) are included in one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification are implemented using firmware or software, and the firmware or software is implemented to include modules, procedures, functions, etc. The firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification is included in one or more processors 102, 202, or stored in one or more memories 104, 204 and driven by one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification are implemented using firmware or software in the form of code, instructions, and / or a set of instructions.

[0132] One or more memories 104, 204 are connected to one or more processors 102, 202 and can store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories 104, 204 are composed of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer-readable storage medium, and / or combinations thereof. The one or more memories 104, 204 are located inside and / or outside the one or more processors 102, 202. Also, the one or more memories 104, 204 are connected to the one or more processors 102, 202 by various technologies such as wired or wireless connections.

[0133] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc. mentioned in this specification in the form of methods and / or flowcharts to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts disclosed in this specification from one or more other devices. For example, one or more transceivers 106, 206 are connected to one or more processors 102, 202 and can transmit and receive wireless signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information or wireless signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information or wireless signals from one or more other devices. Also, one or more transceivers 106, 206 are connected to one or more antennas 108, 208, and one or more transceivers 106, 206 are configured to transmit and receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts disclosed in this specification by one or more antennas 108, 208. In this specification, one or more antennas are multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 convert the received wireless signals / channels, etc. from RF band signals to baseband signals (Convert) in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors 102, 202. One or more transceivers 106, 206 convert the user data, control information, wireless signals / channels, etc. processed using one or more processors 102, 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106, 206 include (analog) oscillators and / or filters.

[0134] Example of utilization of wireless device to which the present invention is applied

[0135] FIG. 9 shows another example of a wireless device to which the present invention is applied. The wireless device is embodied in various forms depending on the usage example / service (see FIG. 7).

[0136] Referring to FIG. 9, the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 8 and are composed of various elements, components, units / parts, and / or modules. For example, the wireless devices 100 and 200 include a communication unit 110, a control unit 120, a memory unit 130, and additional elements 140. The communication unit includes a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 includes one or more processors 102 and 202 and / or one or more memories 104 and 204 in FIG. 8. For example, the transceiver 114 includes one or more transceivers 106 and 206 and / or one or more antennas 108 and 208 of FIG. 8. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional elements 140 and controls various operations of the wireless device. For example, the control unit 120 controls the electrical / mechanical operations of the wireless device based on programs / codes / instructions / information stored in the memory unit 130. Also, the control unit 120 transmits the information stored in the memory unit 130 to the outside (e.g., other communication devices) through a wireless / wired interface by the communication unit 110, or stores the information received from the outside (e.g., other communication devices) through a wireless / wired interface by the communication unit 110 in the memory unit 130.

[0137] The additional element 140 is configured in various ways depending on the type of wireless device. For example, the additional element 140 includes any one of a power unit / battery, an input / output unit (I / O unit), a drive unit, and a computer unit. Without being limited thereto, the wireless device is embodied in forms such as a robot (FIG. 7, 100a), a vehicle (FIG. 7, 100b-1, 100b-2), an XR device (FIG. 7, 100c), a portable device (FIG. 7, 100d), a home appliance (FIG. 7, 100e), an IoT device (FIG. 7, 100f), a digital broadcast terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device (FIG. 7, 400), a base station (FIG. 7, 200), and a network node. The wireless device is movable depending on the usage example / service or is used at a fixed location.

[0138] In FIG. 9, various elements, components, units / parts, and / or modules within the wireless devices 100 and 200 are all connected to each other by a wired interface or at least some of them are wirelessly connected by the communication unit 110. For example, within the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are wired-connected, and the control unit 120 and the first unit (e.g., 130, 140) are wirelessly connected by the communication unit 110. Also, each element, component, unit / part, and / or module within the wireless devices 100 and 200 further includes one or more elements. For example, the control unit 120 is composed of a set of one or more processors. For example, the control unit 120 is composed of a set including a communication control processor, an application processor, an ECU (Electronic control Unit), a graphics processing processor, a memory control processor, etc. As another example, the memory unit 130 is composed of a RAM (Random Access Memory), a DRAM (Dynamic RAM), a ROM (Read Only Memory), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0139] Example of vehicle or autonomous vehicle to which the present invention is applied

[0140] FIG. 10 is a diagram illustrating a vehicle or an autonomous vehicle to which the present invention is applied. The vehicle or the autonomous vehicle is embodied as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, or the like.

[0141] Referring to FIG. 10, the vehicle or the autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 is constituted by a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to blocks 110 / 130 / 140 in FIG. 9.

[0142] The communication unit 110 transmits and receives signals (such as data, control signals, etc.) to and from external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 controls elements of the vehicle or the autonomous driving vehicle 100 to perform various operations. The control unit 120 includes an ECU (Electronic Control Unit). The driving unit 140a enables the vehicle or the autonomous driving vehicle 100 to travel on the ground. The driving unit 140a includes an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or the autonomous driving vehicle 100 and includes a wired / wireless charging circuit, a battery, etc. The sensor unit 140c can obtain vehicle state, surrounding environment information, user information, etc. The sensor unit 140c includes an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensing sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit 140d implements technologies such as maintaining the lane during driving, automatically adjusting the speed like an adaptive cruise control, automatically driving along a predetermined route, and automatically setting and driving along a route when a destination is set.

[0143] As an example, the communication unit 110 receives map data, traffic information data, etc. from an external server. The autonomous driving unit 140d generates an autonomous driving route and a drive plan based on the obtained data. The control unit 120 controls the driving unit 140a so that the vehicle or the autonomous driving vehicle 100 moves on the autonomous driving route according to the drive plan (for example, speed / direction adjustment). The communication unit 110 obtains the latest traffic information data from the external server non-periodically during autonomous driving, and also obtains the surrounding traffic information data from the surrounding vehicles. In addition, the sensor unit 140c obtains the vehicle state and the surrounding environment information during autonomous driving. The autonomous driving unit 140d updates the autonomous driving route and the drive plan based on the newly obtained data / information. The communication unit 110 transmits information regarding the vehicle position, the autonomous driving route, the drive plan, etc. to the external server. The external server can predict the traffic information data in advance using AI technology or the like based on the information collected from the vehicle or the autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or the autonomous driving vehicle.

[0144] It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the features of the present invention. Therefore, the above detailed description should not be construed restrictively in all aspects, but should be considered as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

[0145] 〔Industrial Applicability〕 As described above, the present invention can be applied to various wireless communication systems.

[0146] 〔Claims at the Time of International Application〕 〔1〕 In a wireless communication system, a method for a terminal (UE) to receive a signal, comprising: a step of sensing a first SSB (synchronization signal and physical broadcast channel block); Based on the determination that there is no CORESET (control resource set) for the type 0-PDCCH (physical downlink control channel) CSS (common search space) set in the first SSB, determining the closest GSCN (global synchronization channel number) of the second SSB having a CORESET for the type 0-PDCCH CSS set; Receiving the second SSB based on the closest GSCN; and Performing cell search based on the second SSB; including The closest GSCN is determined based on (i) the GSCN of the first SSB, (ii) the step size, and (iii) the GSCN offset, The step size is determined based on the frequency band in which the first SSB is sensed, a signal reception method. [2] The determining step is executed when the subcarrier offset value indicating the interval from the lowest subcarrier in the CRB to the lowest subcarrier of the first SSB is within a predetermined range, the signal reception method according to [1]. [3] The closest GSCN is determined as a value obtained by adding the product of the step size and the GSCN offset to the GSCN of the first SSB, the signal reception method according to [1]. [4] Based on the frequency band being FR1 (frequency range 1) or FR2-1, the step size is determined to be 1, Based on the frequency band being FR2-2, the step size is determined to be 3, the signal reception method according to [1]. [5] The step size is determined to be the same for the cases where the SCS of the frequency band is 120 kHz and 480 kHz, the signal reception method according to [4]. [6] The signal receiving method according to [2], wherein the GSCN offset is determined based on the frequency band and the subcarrier offset. [7] In a wireless communication system, a terminal for receiving a signal, At least one transceiver; At least one processor; and At least one memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform a specific operation, the terminal comprising: The specific operation includes: Sensing a first SSB (synchronization signal and physical broadcast channel block); Based on a determination that there is no CORESET (control resource set) for a type 0-PDCCH (physical downlink control channel) CSS (common search space) set in the first SSB, determining the closest GSCN (global synchronization channel number) of a second SSB having a CORESET for the type 0-PDCCH CSS set; and Receiving the second SSB based on the closest GSCN, The closest GSCN is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset, The step size is determined based on the frequency band in which the first SSB is sensed, the terminal. [8] The determining step is performed when a subcarrier offset value indicating an interval from the lowest subcarrier in the CRB to the lowest subcarrier of the first SSB is within a predetermined range, the terminal according to [7]. [9] The terminal according to [7], wherein the nearest GSCN is determined as a value obtained by adding the product of the step size and the GSCN offset to the GSCN of the first SSB. 〔10〕 Based on the fact that the frequency band is FR1 (frequency range 1) or FR2-1, the step size is determined to be 1, The terminal according to [7], wherein based on the fact that the frequency band is FR2-2, the step size is determined to be 3. 〔11〕 The cell search method according to

[10] , wherein the step size is determined identically for cases where the SCS of the frequency band is 120 kHz and 480 kHz. 〔12〕 The cell search method according to [8], wherein the GSCN offset is determined based on the frequency band and the subcarrier offset. 〔13〕 An apparatus for a terminal, at least one processor; and at least one computer memory operably connected to the at least one processor and, when executed, causing the at least one processor to perform operations, The operations include sensing a first SSB (synchronization signal and physical broadcast channel block); determining the nearest GSCN (global synchronization channel number) of a second SSB having a CORESET (control resource set) for the type 0-PDCCH CSS (common search space) set based on a determination that there is no CORESET for the type 0-PDCCH CSS set in the first SSB; and receiving the second SSB based on the nearest GSCN. The closest GSCN is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset, The apparatus, wherein the step size is determined based on a frequency band in which the first SSB is detected.

[14] A computer-readable non-transitory storage medium including at least one computer program for causing at least one processor to perform operations, The operations include: Detecting a first SSB (synchronization signal and physical broadcast channel block); Determining a closest GSCN (global synchronization channel number) of a second SSB having a CORESET (control resource set) for the type 0-PDCCH (physical downlink control channel) CSS (common search space) set based on a determination that there is no CORESET for the type 0-PDCCH CSS set in the first SSB; and Receiving the second SSB based on the closest GSCN, The closest GSCN is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset, The storage medium, wherein the step size is determined based on a frequency band in which the first SSB is detected.

[15] In a wireless communication system, a method for a base station (BS) to transmit a signal, Step of transmitting a first SSB (synchronization signal and physical broadcast channel block) without a CORESET (control resource set) for a type 0-PDCCH (physical downlink control channel) CSS (common search space) set; Including the step of transmitting a second SSB having a CORESET for the type 0-PDCCH CSS set; The closest GSCN (global synchronization channel number) of the second SSB is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset, The step size is determined based on the frequency band in which the first SSB is sensed, a signal transmission method.

[16] In a wireless communication system, a base station for receiving a signal, At least one transceiver; At least one processor; and At least one memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform a specific operation; comprising The specific operation is Step of transmitting a first SSB (synchronization signal and physical broadcast channel block) without a CORESET (control resource set) for a type 0-PDCCH (physical downlink control channel) CSS (common search space) set; Including the step of transmitting a second SSB having a CORESET for the type 0-PDCCH CSS set; The closest global synchronization channel number (GSCN) of the second SSB is determined based on (i) the GSCN of the first SSB, (ii) the step size, and (iii) the GSCN offset. The base station, where the step size is determined based on the frequency band in which the first SSB is sensed.

Claims

1. In a wireless communication system, a method for a terminal (UE) to receive a signal, comprising: sensing a first SSB (synchronization signal and physical broadcast channel block); based on a determination that there is no CORESET (control resource set) for a type 0-PDCCH (physical downlink control channel) CSS (common search space) set in the first SSB, determining the closest GSCN (global synchronization channel number) of a second SSB having a CORESET for the type 0-PDCCH CSS set; receiving the second SSB based on the closest GSCN; and performing cell search based on the second SSB; the closest GSCN is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset, the step size is determined based on the frequency band in which the first SSB is sensed, based on the frequency band being FR1 (frequency range 1) or FR2-1 (frequency range 2-1), the step size is determined to be 1, based on the frequency band being FR2-2 (frequency range 2-2), the step size is determined to be 3, a signal reception method.

2. The method according to claim 1, wherein the determining step is performed when a subcarrier offset value indicating an interval from a lowest subcarrier in a CRB to a lowest subcarrier of the first SSB is within a predetermined range.

3. The signal receiving method according to claim 1, wherein the closest GSCN is determined as a value obtained by adding the product of the step size and the GSCN offset to the GSCN of the first SSB.

4. The signal receiving method according to claim 1, wherein the step size is determined identically for the cases where the SCS of the frequency band is 120 kHz and 480 kHz.

5. The signal receiving method according to claim 2, wherein the GSCN offset is determined based on the frequency band and the subcarrier offset.

6. In a wireless communication system, a terminal for receiving a signal, comprising: At least one transceiver; At least one processor; and At least one memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform a specific operation. The specific operation includes: Sensing a first SSB (synchronization signal and physical broadcast channel block); Determining the closest GSCN (global synchronization channel number) of a second SSB having a CORESET for the type 0-PDCCH (physical downlink control channel) CSS (common search space) set based on a determination that there is no CORESET for the type 0-PDCCH CSS set in the first SSB; and Receiving the second SSB based on the closest GSCN. The closest GSCN is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset. The step size is determined based on the frequency band in which the first SSB is detected. Based on the frequency band being FR1 (frequency range 1) or FR2-1 (frequency range 2-1), the step size is determined to be 1. Based on the frequency band being FR2-2 (frequency range 2-2), the step size is determined to be 3, for the terminal. **Claim 7** The determining step is performed when a subcarrier offset value indicating the interval from the lowest subcarrier in the CRB to the lowest subcarrier of the first SSB is within a predetermined range, for the terminal according to claim 6. **Claim 8** The closest GSCN is determined to be a value obtained by adding the product of the step size and the GSCN offset to the GSCN of the first SSB, for the terminal according to claim 6. **Claim 9** The step size is determined identically for the case where the SCS of the frequency band is 120 kHz and the case where it is 480 kHz, for the terminal according to claim 6. **Claim 10** The GSCN offset is determined based on the frequency band and the subcarrier offset, for the terminal according to claim 7. **Claim 11** An apparatus for a terminal, comprising: At least one processor; and At least one computer memory operably connected to the at least one processor and, when executed, causing the at least one processor to perform operations. The operations are The step of sensing a first SSB (synchronization signal and physical broadcast channel block); Based on a determination that there is no CORESET (control resource set) for a type 0-PDCCH (physical downlink control channel) CSS (common search space) set in the first SSB, determining the closest GSCN (global synchronization channel number) of a second SSB having a CORESET for the type 0-PDCCH CSS set; and Receiving the second SSB based on the closest GSCN; including The closest GSCN is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset, The step size is determined based on the frequency band in which the first SSB is sensed, Based on the frequency band being FR1 (frequency range 1) or FR2-1 (frequency range 2-1), the step size is determined to be 1, Based on the frequency band being FR2-2 (frequency range 2-2), the step size is determined to be 3, a device.

12. A computer-readable non-volatile storage medium including at least one computer program for causing at least one processor to perform operations, The operations are, The step of sensing a first SSB (synchronization signal and physical broadcast channel block); Based on the determination that there is no CORESET (control resource set) for the type 0-PDCCH (physical downlink control channel) CSS (common search space) set in the first SSB (synchronization signal and physical broadcast channel block), determining the closest GSCN (global synchronization channel number) of the second SSB having a CORESET for the type 0-PDCCH CSS set; and receiving the second SSB based on the closest GSCN; comprising the closest GSCN is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset the step size is determined based on the frequency band in which the first SSB is sensed based on the frequency band being FR1 (frequency range 1) or FR2-1 (frequency range 2-1), the step size is determined to be 1 based on the frequency band being FR2-2 (frequency range 2-2), the step size is determined to be 3, a storage medium

13. In a wireless communication system, a method for a base station (BS) to transmit a signal, comprising transmitting a first SSB (synchronization signal and physical broadcast channel block) in which there is no CORESET (control resource set) for the type 0-PDCCH (physical downlink control channel) CSS (common search space) set transmitting a second SSB having a CORESET for the type 0-PDCCH CSS set; comprising The closest GSCN (global synchronization channel number) of the second SSB is determined based on (i) the GSCN of the first SSB, (ii) a step size, and (iii) a GSCN offset. The step size is determined based on the frequency band in which the first SSB is detected. Based on the frequency band being FR1 (frequency range 1) or FR2-1 (frequency range 2-1), the step size is determined to be 1. Based on the frequency band being FR2-2 (frequency range 2-2), the step size is determined to be 3, a signal transmission method.

14. In a wireless communication system, a base station for receiving a signal, At least one transceiver; At least one processor; and At least one memory operably connected to the at least one processor and storing instructions that cause the at least one processor to perform a specific operation when executed; comprising The specific operation is Transmitting a first SSB (synchronization signal and physical broadcast channel block) for which there is no CORESET (control resource set) for a type 0-PDCCH (physical downlink control channel) CSS (common search space) set; Transmitting a second SSB having a CORESET for the type 0-PDCCH CSS set; including The nearest GSCN (global synchronization channel number) of the second SSB is determined based on (i) the GSCN of the first SSB, (ii) the step size, and (iii) the GSCN offset. The step size is determined based on the frequency band in which the first SSB is detected. Based on the frequency band being FR1 (frequency range 1) or FR2-1 (frequency range 2-1), the step size is determined to be 1. Based on the frequency band being FR2-2 (frequency range 2-2), the step size is determined to be 3, base station.

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