terminal

Abstract

The terminal assumes that when using a different frequency band than a frequency band including one or more frequency ranges, a single subcarrier spacing for synchronization signal blocks is applied to the subcarrier spacing for data and / or control.

Description

Technical Field

[0001] The present disclosure relates to a terminal that performs wireless communication, and in particular to a terminal that supports a wider subcarrier spacing such as 960 kHz. Background Art

[0002] In the 3rd Generation Partnership Project (3GPP), the fifth generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)) is standardized, and the standardization of the next generation called Beyond 5G, 5G Evolution or 6G is also underway.

[0003] 3GPP Release 15 and Release 16 (NR) standardize operations in bands encompassing multiple frequency ranges, specifically, FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz).

[0004] Furthermore, in 3GPP Release 17, research is underway on NR support beyond 52.6 GHz up to 71 GHz (Non-Patent Document 1). Furthermore, the goal is for Beyond 5G, 5G Evolution, or 6G (Release 18 and later) to also support frequency bands exceeding 71 GHz.

[0005] In the frequency band of 52.6 to 71 GHz, considering the efficient coexistence resulting from setting the channel bandwidth equivalent to IEEE (Institute of Electrical and Electronics Engineers) 802.11ad / ay (approximately 2 GHz) and the reduction in the overhead of PTRS (Phase Tracking Reference Signal) which helps reduce phase noise, research is underway to support a wider subcarrier spacing (SCS), for example, 960 kHz (non-patent document 2).

[0006] Prior art literature

[0007] Non-patent literature

[0008] Non-Patent Document 1: “New WID on Extending current NR operation to 71 GHz,” RP-193229, 3GPP TSG RAN Meeting #86, 3GPP, December 2019

[0009] Non-Patent Document 2: “RAN1 Chairman’s Notes,” 3GPP TSG RAN WG1 Meeting #101-e, e-Meeting, 3GPP, June 2020 Summary of the Invention

[0010] A wider SCS such as 960kHz can be expected to have the effects described above. On the other hand, considering implementation, etc., it is desirable to minimize the number of SCSs supported for the 52.6-71 GHz band.

[0011] However, when supporting a wider SCS such as 960 kHz in a high frequency band such as 52.6 to 71 GHz, there are some parts in the existing 3GPP specifications that are not necessarily appropriate.

[0012] For example, when supporting wider SCS such as 960kHz in addition to the existing 120kHz and 240kHz, there is a concern that the combination of the SCS used for the synchronization signal block (SSB (SS / PBCH Block (Synchronization Signal / PhysicalBroadcast Channel Block)) in the initial access and the SCS used for data and / or control will increase, making the processing complicated.

[0013] Therefore, the following disclosure is made in view of such a situation, and its purpose is to provide a terminal that can minimize the impact on 3GPP specifications even when supporting wider SCS such as 960kHz in high frequency bands such as 52.6-71GHz, which are different from FR1, FR2, etc., and in particular avoid the complexity of processing related to initial access.

[0014] One embodiment of the present disclosure is a terminal (UE 200) comprising: a receiving unit (wireless signal transceiver unit 210) that receives a synchronization signal block; and a control unit (control unit 270) that, when using a different frequency band from a frequency band including one or more frequency ranges, applies a single subcarrier spacing for the synchronization signal block to the subcarrier spacing for data and / or control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a diagram schematically illustrating the overall configuration of the wireless communication system 10 .

[0016] Figure 2 1 is a diagram showing frequency ranges used in the wireless communication system 10 .

[0017] Figure 31 is a diagram showing a configuration example of a radio frame, a subframe, and a time slot used in the wireless communication system 10 .

[0018] Figure 4 FIG. 2 is a functional block diagram of UE 200 .

[0019] Figure 5 This is a diagram showing a schematic configuration example of the SSB mode (mode E) and multiple SCSs.

[0020] Figure 6 This figure shows an example of a combination of SCS for SSB and SSB pattern when 960 kHz is used as SCS for data and / or control.

[0021] Figure 7A This is a diagram showing an example (part 1) of the SSB mode applied to the 960 kHz SCS.

[0022] Figure 7B This is a diagram showing an example (part 2) of the SSB mode applied to the 960 kHz SCS.

[0023] Figure 8 This is a diagram showing an example (part 2) of the SSB mode applied to the 960 kHz SCS.

[0024] Figure 9 This is a diagram showing an example of the hardware configuration of the UE 200 . DETAILED DESCRIPTION

[0025] Hereinafter, the embodiment will be described with reference to the accompanying drawings. In addition, the same or similar reference numerals are given to the same functions and structures, and their descriptions are omitted as appropriate.

[0026] (1) Overall schematic structure of wireless communication system

[0027] Figure 1 This is a schematic diagram of the overall structure of a wireless communication system 10 according to this embodiment. The wireless communication system 10 is a wireless communication system that complies with 5G New Radio (NR) and includes a next-generation radio access network 20 (NG-RAN 20) and a terminal 200 (UE 200, user equipment, or UE). Alternatively, the wireless communication system 10 may be a wireless communication system that complies with standards such as Beyond 5G, 5G Evolution, or 6G.

[0028] NG-RAN 20 includes a radio base station 100 (hereinafter referred to as gNB 100). In addition, the specific structure of the wireless communication system 10 including the number of gNBs and UEs is not limited to Figure 1 Example shown.

[0029] The NG-RAN 20 actually comprises multiple NG-RAN nodes, specifically multiple gNBs (or ng-eNBs), connected to the 5G core network (5GC, not shown). The NG-RAN 20 and 5GC can be simply referred to as the "network."

[0030] gNB 100 is a 5G-compliant radio base station that performs 5G-compliant wireless communications with UE 200. gNB 100 and UE 200 support Massive MIMO (Multiple Input Multiple Output), which generates a more directional antenna beam (hereinafter referred to as Beam BM) by controlling radio signals transmitted from multiple antenna elements; Carrier Aggregation (CA), which bundles and uses multiple component carriers (CCs); and Dual Connectivity (DC), which allows simultaneous communication between the UE and two NG-RAN nodes.

[0031] The gNB 100 can transmit multiple BM beams with different transmission directions (also referred to as directions, radiation directions, coverage areas, etc.) in a spatial and time division manner. Furthermore, the gNB 100 can also transmit multiple BM beams simultaneously.

[0032] Furthermore, the wireless communication system 10 may support multiple frequency ranges (FRs). Figure 2 The frequency range used in the wireless communication system 10 is shown.

[0033] FR1: 410MHz~7.125GHz

[0034] FR2: 24.25GHz to 52.6GHz

[0035] In FR1, a sub-carrier spacing (SCS) of 15, 30, or 60 kHz can be used, and a bandwidth (BW) of 5 to 100 MHz can be used. FR2 has a higher frequency than FR1, and an SCS of 60 or 120 kHz (including 240 kHz) can be used, and a bandwidth (BW) of 50 to 400 MHz can be used.

[0036] In addition, SCS can also be interpreted as a numerology. The numerology is defined in 3GPP TS 38.300 and corresponds to a subcarrier spacing in the frequency domain.

[0037] Furthermore, the wireless communication system 10 also supports frequency bands higher than the FR2 frequency band. Specifically, the wireless communication system 10 supports frequency bands exceeding 52.6 GHz up to 71 GHz. For convenience, such high frequency bands may be referred to as "FR2x."

[0038] To solve this problem, when using a band exceeding 52.6 GHz, CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) / DFT-S-OFDM (Discrete Fourier Transform-Spread) with a larger subcarrier spacing (SCS) can be applied.

[0039] Furthermore, in high-frequency bands such as FR2x, as mentioned above, increased inter-carrier phase noise becomes a problem, and therefore, it may be necessary to apply a larger (wider) SCS or a single-carrier waveform.

[0040] The larger the SCS is, the shorter the symbol / cyclic prefix (CP) period and the slot period are (when the structure of 14 symbols / slot is maintained). Figure 3 1 and 2 show configuration examples of radio frames, subframes, and time slots used in the wireless communication system 10. Table 1 also shows the relationship between SCSs and symbol periods.

[0041] [Table 1]

[0042]

[0043] As shown in Table 1, while maintaining a 14-symbol / slot structure, the larger (wider) the SCS, the shorter the symbol period (and therefore the slot period). Furthermore, the symbol period may also be referred to as the symbol length, the time direction, or the time domain. Furthermore, the frequency direction may also be referred to as the frequency domain, resource block, subcarrier, or BWP (Bandwidth part).

[0044] In addition, the number of symbols constituting one slot does not necessarily have to be 14 symbols (for example, 28 or 56 symbols). In addition, the number of slots per subframe may also differ depending on the SCS.

[0045] Furthermore, in the wireless communication system 10 , an SSB (SS / PBCH Block) composed of a synchronization signal (SS: Synchronization Signal) and a downlink physical broadcast channel (PBCH: Physical Broadcast CHannel) can be used.

[0046] SSBs are periodically transmitted from the network primarily to UE 200 for cell ID and reception timing detection at the start of communication. In NR, SSBs are also used for reception quality measurement in each cell. SSB transmission periods can be specified as 5, 10, 20, 40, 80, or 160 milliseconds. For initial access, a UE 200 can assume a 20 millisecond transmission period.

[0047] The network (NG-RAN 20) can notify UE 200 of the index display (ssb-PositionsInBurst) of the SSB actually transmitted through system information (SIB1) or radio resource control (RRC) layer signaling.

[0048] The SS is composed of a primary synchronization signal (PSS: Primary SS) and a secondary synchronization signal (SSS: Secondary SS).

[0049] The PSS is a known signal that the UE 200 initially attempts to detect during the cell search process. The SSS is a known signal that is transmitted during the cell search process to detect the physical cell ID.

[0050] The PBCH contains the radio frame number (SFN: System Frame Number), an index for identifying the symbol positions of multiple SS / PBCH blocks within a half-frame (5 milliseconds), and other information required for UE 200 to establish frame synchronization with the NR cell formed by gNB 100 after detecting the SS / PBCH block.

[0051] The PBCH also includes system parameters required for receiving system information (SIBs). Furthermore, the SSBs also include the demodulation reference signal for the PBCH (DMRS). The DMRS for PBCH is a known signal transmitted to measure the radio channel status for PBCH demodulation.

[0052] (2) Functional block structure of wireless communication system

[0053] Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block configuration of the UE 200 will be described.

[0054] Figure 4 2 is a functional block diagram of UE 200. Figure 4 As shown, UE 200 includes a radio signal transceiver 210 , an amplifier 220 , a modem 230 , a control signal and reference signal processor 240 , an encoder / decoder 250 , a data transceiver 260 , and a controller 270 .

[0055] The wireless signal transceiver 210 transmits and receives wireless signals compliant with NR. It supports Massive MIMO, CA (combining multiple CCs), and DC (concurrent communication) where the UE communicates with two NG-RAN nodes simultaneously.

[0056] In addition, in this embodiment, the wireless signal transceiver 210 can receive a synchronization signal block (SSB). In this embodiment, the wireless signal transceiver 210 constitutes a receiving unit.

[0057] Specifically, the wireless signal transceiver 210 receives the signal from the gNB 100 using the beam BM (see Figure 1 ) and transmits SSB. The beam BM can be a directional beam or a non-directional beam.

[0058] The maximum number of beams used in SSB transmission is, for example, 64 (in the case of 3GPP Release 15 (FR2)). However, in order to cover a certain geographical area with narrower beams, the maximum number of beams can be increased. In this case, the number of SSBs is also 64 or more, and the index identifying the SSB (SSB index) can also use a value starting from #64.

[0059] The amplifier 220 is composed of a PA (Power Amplifier) ​​and an LNA (Low Noise Amplifier). The amplifier 220 amplifies the signal output from the modem 230 to a predetermined power level. The amplifier 220 also amplifies the RF signal output from the wireless signal transceiver 210.

[0060] The modem unit 230 performs data modulation / demodulation, transmit power settings, and resource block allocation for each predetermined communication target (e.g., gNB 100). Modem unit 230 can employ CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) and DFT-S-OFDM (Discrete Fourier Transform-Spread OFDM). DFT-S-OFDM can be used not only in the uplink (UL) but also in the downlink (DL).

[0061] The control signal / reference signal processing unit 240 performs processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200 .

[0062] Specifically, the control signal / reference signal processing unit 240 receives various control signals, such as radio resource control (RRC) control signals, transmitted from the gNB 100 via predetermined control channels. Furthermore, the control signal / reference signal processing unit 240 transmits various control signals to the gNB 100 via predetermined control channels.

[0063] The control signal and reference signal processing unit 240 performs processing using reference signals (RS) such as a demodulation reference signal (DMRS) and a phase tracking reference signal (PTRS).

[0064] DMRS is a terminal-specific reference signal (pilot signal) known between the base station and the terminal for estimating a fading channel used for data demodulation. PTRS is a terminal-specific reference signal for estimating phase noise, a problem in high-frequency bands.

[0065] Furthermore, reference signals may include, in addition to DMRS and PTRS, a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information.

[0066] In addition, the channels include control channels and data channels. The control channels can include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel, Downlink Control Information (DCI) including Random Access Radio Network Temporary Identifier (RA-RNTI), and Physical Broadcast Channel (PBCH).

[0067] Furthermore, data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel), etc. Data may mean data transmitted via the data channel.

[0068] PUCCH can be interpreted as a UL physical channel used to transmit UCI (Uplink Control Information). UCI can be transmitted via either PUCCH or PUSCH depending on the situation. In addition, downlink control information (DCI) can always be transmitted via PDCCH or can be transmitted without passing through PDSCH.

[0069] The UCI may include at least any one of ACK / NACK of a hybrid automatic repeat request (HARQ), a scheduling request (SR) from the UE 200 , and channel state information (CSI).

[0070] In addition, the timing and radio resources for transmitting the PUCCH can be controlled by DCI in the same manner as the data channel.

[0071] The encoding / decoding unit 250 performs data segmentation / concatenation and channel coding / decoding, etc. for each predetermined communication target (gNB 100 or other gNB).

[0072] Specifically, the encoding / decoding unit 250 divides the data output from the data transceiver 260 into predetermined sizes and performs channel coding on the divided data. In addition, the encoding / decoding unit 250 decodes the data output from the modulation / demodulation unit 230 and concatenates the decoded data.

[0073] The data transceiver 260 transmits and receives Protocol Data Units (PDUs) and Service Data Units (SDUs). Specifically, it assembles and disassembles PDUs and SDUs across multiple layers, including the Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP). Furthermore, the data transceiver 260 performs data error correction and retransmission control based on the Hybrid Automatic Repeat Request (HARQ).

[0074] The control unit 270 controls each functional block constituting the UE 200. In particular, in this embodiment, the control unit 270 controls the subcarrier spacing (SCS) for synchronization signal blocks (SSBs) and the setting of SCS for data and / or control.

[0075] Specifically, the control unit 270 may assume that, when using a high frequency band such as FR2x, a single SCS for SSB is used for the SCS for data and / or control. That is, even when multiple SCSs for data and / or control are specified (e.g., 120 kHz, 240 kHz), only one SCS for SSB is used (e.g., 960 kHz).

[0076] Here, data may mean user data, and control may mean various control signals transmitted via a control channel.

[0077] Alternatively, the control unit 270 may assume that when a high frequency band such as FR2x is used, the SCS for SSB is also applied to the SCS for data and / or control.

[0078] For example, if the SCS used for SSB is 240kHz, it can be assumed that the SCS used for data and / or control is also the same, that is, 240kHz.

[0079] In addition, such SCS setting is not limited to high frequency bands such as FR2x, and can also be applied when using a different frequency band from the frequency band containing one or more frequency ranges (FR1, FR2).

[0080] Alternatively, when using a different frequency band including a high frequency band such as FR2x, the control unit 270 may assume a single SCS for SSB. In other words, the control unit 270 may assume a single SCS (e.g., 960 kHz) for SSB, regardless of the settings of the SCS for data and / or control.

[0081] Furthermore, when the SCS for the low frequency band including FR1 and FR2 is applied to a different frequency band including a high frequency band such as FR2x, the control unit 270 may assume an SSB pattern associated with the SCS for the frequency band including FR1 and FR2.

[0082] The SSB mode is specified, for example, in 3GPP TSTS 38.101-1 / 2, Chapter 5.4.3.3 (Synchronization raster entries for each operating band). More specifically, for FR2, the SSB mode when using a 120 kHz SCS (Case D, hereinafter referred to as Pattern D) and the SSB mode when using a 240 kHz SCS (Case E, hereinafter referred to as Pattern E) are specified for initial access by UE 200. Specific SSB modes are also specified in 3GPP TS 38.213, Chapter 4.1.

[0083] Furthermore, in the case of initial access by the UE 200 , the control unit 270 may assume that a specific SCS for SSB (eg, 240 kHz) is associated with a specific SSB mode (eg, Mode E).

[0084] In this case, a single SCS and a single SSB mode may be specified. Alternatively, two SSB SCSs may be associated with a specific SSB mode for each frequency band (which may be narrower than the operating band or frequency range).

[0085] (3) Operation of wireless communication system

[0086] Next, the operation of the wireless communication system 10 will be described. Specifically, the operation related to the setting of the subcarrier spacing (SCS) for SSB and the SCS for data and / or control in the UE 200 will be described.

[0087] (3.1) Prerequisites

[0088] As mentioned above, when NR-U is applied in the frequency band of 52.6 to 71 GHz, wider SCS such as 960 kHz has the advantages of efficient coexistence due to setting the channel bandwidth equivalent to IEEE802.11ad / ay (approximately 2 GHz), and reduced PTRS overhead.

[0089] On the other hand, considering implementation and the like, it is desirable to minimize the number of SCSs supporting the 52.6-71 GHz band.

[0090] For example, when NR-U is applied in the frequency band of 52.6 to 71 GHz, it is considered sufficient to support a parameter set (numerology) for 1 2 GHz bandwidth (for example, 960 kHz SCS) and other parameter sets based on simple extensions of FR2 (for example, 120 kHz SCS), and other parameter sets may not be supported.

[0091] When applying a simple extension of FR2 (e.g., 120kHz SCS) to the 52.6-71GHz band, the 3GPP Release 15 / 16 specifications are considered largely reusable. However, applying 960kHz SCS obviously requires special processing different from that of 3GPP Release 15 / 16.

[0092] When 960kHz SCS is applied, it is expected that the time (length) of code elements and time slots will be shortened, so there will be various timing-related influences.

[0093] As described above, in the initial access of the UE 200 based on NR-only standalone (SA), basically, only a single SSB SCS and a single SSB mode are specified for each frequency band (Operating band) (see 3GPP TS 38.101-1 / 25.4.3.3).

[0094] This can reduce the number of hypotheses for SSB search. However, FR2 specifies both 120 kHz SCS (mode D) and 240 kHz SCS (mode E) for initial access.

[0095] For example, when 120kHz and 960kHz are supported as SCS for data and / or control in high frequency bands such as FR2x, it is unclear how the support for SCS for SSB and the combination of SCS for SSB and SCS for data and / or control will change.

[0096] When the 960kHz SCS is also supported, 120kHz, 240kHz, or 960kHz can be considered as the SSB SCS. However, from the perspective of operational complexity, it is preferable to avoid initial access based on such three SSB SCSs (numerology).

[0097] In addition, when supporting 120kHz SCS for data and / or control, it is considered unnecessary to support both 120kHz and 240kHz SCS for SSB, and it is preferable to support only one.

[0098] In addition, when the SCS supporting 960kHz for SSB is not supported, when the SCS supporting SSB is applied and the SCS supporting 960kHz is further applied for data and / or control, the SSB mode supporting SSB becomes unclear.

[0099] The following describes the actions related to the SCS settings that can eliminate this problem.

[0100] (3.2) Action example

[0101] When a wider SCS such as 960 kHz is applied, UE 200 can operate as follows regarding the setting of the SCS for SSB and the SCS for data and / or control.

[0102] Specifically, UE 200 may utilize a single SCS for SSBs in addition to the SCSs for data and / or control when using a high frequency band such as FR2x. For example, as described above, even when multiple SCSs for data and / or control (e.g., 120 kHz, 240 kHz) are used, only one SCS for SSBs (e.g., 960 kHz) may be used.

[0103] Furthermore, in high frequency bands such as FR2x, UE 200 can assume a single SCS for SSB, regardless of the settings of the SCS for data and / or control. Furthermore, this single SCS for SSB can be pre-defined by 3GPP specifications or indicated to UE 200 by the network.

[0104] Alternatively, when SCS other than 960kHz (e.g., 120kHz and / or 240kHz) is supported as data and / or control SCS in high frequency bands such as FR2x, UE 200 can reuse the 240kHz SSB SCS and SSB mode (Mode E).

[0105] Figure 5 An example of the schematic structure of the SSB mode (mode E) and multiple SCSs is shown. Figure 5As shown, in Mode E, 240kHz SCS is applied, and SSBs #0 to #3 are mapped across multiple slots. Similarly, SSBs #4 to #7 are mapped across multiple slots. The numbers 0 to 13 in the figure represent the symbol numbers within the slot.

[0106] In addition, as in Figure 3 As described in , when SCS of 480kHz or 960kHz is applied, the symbol length (time slot length) becomes shorter (the rectangular frame in the figure corresponds to the time slot).

[0107] Figure 6 An example of a combination of SCS and SSB pattern for SSB when 960 kHz is used as SCS for data and / or control is shown.

[0108] like Figure 6 As shown, the SCS and SSB mode (mode E) for 240kHz SSB can be reused (Alt. 1). Alternatively, new SSB modes (herein, for convenience, modes X1 to X3) can be combined for the 240kHz, 480kHz, and 960kHz SCSs, respectively. Modes X1 to X3 can be different modes, or they can be modes that differ only in part.

[0109] Such a new SSB mode can meet the following elements.

[0110] Each SSB (based on 480 kHz or 960 kHz SCS) is mapped into a time slot based on the 960 kHz SCS (ie, one SSB is not mapped across multiple time slots).

[0111] Figure 7A and Figure 7B Examples (Part 1 and Part 2) of the SSB mode applied to such a 960 kHz SCS are shown.

[0112] like Figure 7A and Figure 7B As shown, SSB#0 to SSB#7 are mapped to the time slot based on 960kHz SCS in a closed manner, without being mapped across multiple time slots. Figure 7A As shown, they can be configured one by one in non-continuous time slots, or as shown Figure 7B The configuration is shown one by one in consecutive time slots.

[0113] Each SSB (based on 240kHz SCS) is mapped into a slot based on 960kHz SCS (in the case where a slot has more than 14 symbols), or is mapped into two consecutive slots based on 960kHz SCS (however, one SSB is not mapped across the boundary of two slots).

[0114] Figure 8 An example (part 2) of the SSB mode applied to such a 960kHz SCS is shown. Figure 8 As shown in FIG. 1 , the SSB is mapped to a time slot (when the time slot has more than 14 symbols) (SSB#0), but it can also be mapped to two consecutive time slots based on the 960kHz SCS (SSB#1). In this case, the two consecutive time slots to which one SSB is mapped can be limited to the case where the two consecutive time slots are limited to slot#0 and slot#1, starting from the time slot with an even index (#0).

[0115] Alternatively, as described above, mode E may be reused, but in this case, the time slots overlapping at least a portion of the SSB may be made unusable for other purposes (i.e., it may not be assumed that UE 200 transmits or receives signals / channels other than SSB).

[0116] In addition, during initial access in high frequency bands such as FR2x, specific SSB SCS and SSB modes can be specified.

[0117] Specifically, any of the following can be specified.

[0118] (Alt. 1): Specify one SSB SCS and SSB mode for each frequency band.

[0119] For example, when supporting 120kHz SCS and 240kHz SCS for SSB, any one SCS is designated as the initial access for each frequency band.

[0120] Alternatively, when supporting 240kHz SCS for SSB and 480kHz or 960kHz SCS, any one SCS is designated as the initial access for each frequency band.

[0121] (Alt. 2): For each frequency band, two SCSs for SSB and the SSB mode corresponding to the SCSs are specified.

[0122] For example, when 120kHz SCS, 240kHz SCS, 480kHz SCS, or 960kHz SCS is supported for SSB, any two SCSs are designated for initial access to each frequency band.

[0123] In addition, any one of the above-mentioned (Alt. 1) or (Alt. 2) can be appropriately applied to different frequency bands.

[0124] (4) Action / Effect

[0125] According to the above embodiment, the following effects can be achieved: Specifically, when UE 200 uses a high frequency band such as FR2x, it is assumed that a single SCS for SSB is applied to the SCS for data and / or control.

[0126] Therefore, even when supporting a wide SCS such as 960 kHz in a high frequency band such as 52.6 to 71 GHz and supporting multiple SCSs, the load for searching for SSBs can be reduced. Specifically, according to the wireless communication system 10, even when supporting a wide SCS such as 960 kHz in a different frequency band than FR1 or FR2, the impact on 3GPP specifications can be minimized, and in particular, the complication of processing related to initial access using SSBs can be avoided.

[0127] In this embodiment, when UE 200 uses an inter-band frequency band including a high frequency band such as FR2x, it can assume a single SCS for the SSB. Therefore, even when supporting a wider SCS such as 960 kHz and multiple SCSs, the number of hypotheses used for SSB searches can be reduced, further reducing the load on UE 200 for SSB searches.

[0128] In this embodiment, when an SCS for a low frequency band including FR1 and FR2 is applied to an inter-frequency band including a high frequency band such as FR2x, UE 200 can assume the pattern of SSBs associated with the SCS for the frequency band including FR1 and FR2. Therefore, even when multiple SCSs are supported, the number of hypotheses for searching for SSBs can be reduced, further reducing the load on UE 200 for searching for SSBs.

[0129] In this embodiment, during initial access, UE 200 can assume that a specific SCS (e.g., 240 kHz) for SSB is associated with a specific SSB pattern (e.g., Pattern E). This can reduce the number of hypotheses used to search for SSBs, further reducing the load on the SSB search.

[0130] (5) Other Implementation Methods

[0131] Although the embodiment has been described above, the present invention is not limited to the description of the embodiment, and it is obvious that various modifications and improvements can be made by those skilled in the art.

[0132] For example, in the above embodiment, an example in which the 960 kHz SCS is mainly applied in FR2x is described. However, an SCS wider than the SCS applied in FR1 or FR2, for example, a 480 kHz SCS may be applied in FR2x.

[0133] In addition, the block diagram ( Figure 4 ) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or it can be implemented by connecting two or more physically or logically separated devices directly or indirectly (for example, using wired or wireless connections) and using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0134] Functionally, these include, but are not limited to, judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (structural unit) that enables the transmission function is called a transmitting unit or a transmitter. In short, as described above, there is no particular limitation on the implementation method.

[0135] Furthermore, the above-mentioned UE 200 may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Figure 9 2 is a diagram showing an example of the hardware configuration of UE 200. Figure 9 As shown, UE 200 may also be configured as a computer device including a processor 1001 , a memory 1002 (memory), a storage 1003 (storage), a communication device 1004 , an input device 1005 , an output device 1006 , and a bus 1007 .

[0136] In the following description, the word "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of UE 200 may include one or more of the devices shown in the figures, or may exclude some of the devices.

[0137] Each functional block of UE 200 (see Figure 4 ) is implemented by any hardware element or combination of hardware elements in the computer device.

[0138] In addition, each function in UE 200 is implemented by reading predetermined software (program) on hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of the reading and writing of data in memory 1002 and storage 1003.

[0139] The processor 1001 controls the entire computer by, for example, running an operating system. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, registers, and the like.

[0140] In addition, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and performs various processes accordingly. As a program, a program that causes the computer to perform at least a part of the actions described in the above-mentioned embodiment is used. Moreover, with respect to the above-mentioned various processes, although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be installed by one or more chips. In addition, the program can also be sent from the network via a telecommunications line.

[0141] The memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), and a random access memory (RAM). The memory 1002 may also be referred to as a register, a cache, or a main memory (main storage device). The memory 1002 may store programs (program code), software modules, and the like that enable execution of the method according to an embodiment of the present disclosure.

[0142] The memory 1003 is a computer-readable recording medium and may be composed of, for example, at least one of an optical disk such as a compact disc read-only memory (CD-ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic stripe, and the like. The memory 1003 may also be referred to as an auxiliary storage device. The aforementioned recording medium may be, for example, a database, a server, or other appropriate medium that includes at least one of the memory 1002 and the memory 1003.

[0143] The communication device 1004 is hardware (transceiver) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc.

[0144] For example, the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD).

[0145] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, LED light, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrally formed (e.g., a touch panel).

[0146] Furthermore, the processor 1001, the memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between devices.

[0147] Furthermore, the device 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 implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0148] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information), high-layer signaling (e.g., RRC signaling, medium access control (MAC: Medium Access Control) signaling, broadcast information (Master Information Block (MIB: Master Information Block), System Information Block (SIB: System Information Block)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0149] Each form / embodiment described in this disclosure may also be applied to at least one of Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (registered trademark), systems using other appropriate systems, and next-generation systems extended therefrom. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G) may also be applied.

[0150] The processing procedures, timings, and flows of each form / implementation described in this disclosure may be performed in a different order unless there is a conflict. For example, the methods described in this disclosure use an illustrative order to present the elements of various steps, but are not limited to the specific order presented.

[0151] In this disclosure, specific actions performed by a base station are sometimes performed by its upper node, depending on the situation. In a network consisting of one or more network nodes including a base station, various actions performed to communicate with a terminal can be performed by at least one of the base station and other network nodes other than the base station (for example, an MME or S-GW, but not limited thereto). In the above description, the example of a single other network node other than the base station is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0152] Information or signals (such as information) can be output from a higher layer (or lower layer) to a lower layer (or higher layer), and can also be input or output via multiple network nodes.

[0153] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input or output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0154] The determination may be made using a value represented by one bit (0 or 1), a Boolean value (true or false), or a comparison of numerical values ​​(for example, comparison with a predetermined value).

[0155] Each form / implementation described in this disclosure may be used individually or in combination, and may be switched between them depending on the execution. Furthermore, notification of scheduled information is not limited to being performed explicitly (e.g., a notification of "yes X") but may also be performed implicitly (e.g., not notifying the scheduled information).

[0156] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to instructions, sets of instructions, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0157] Furthermore, software, commands, information, and the like may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0158] The information, signals, etc. described in this disclosure may also be represented using any of a variety of different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be referred to in the entire description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0159] In addition, the terms used in this disclosure and those required for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0160] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0161] In addition, the information, parameters, etc. described in this disclosure may be represented by absolute values, relative values ​​relative to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0162] The names used for the above parameters are not limiting in any way. Furthermore, the formulas and the like using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by appropriate names, and the names assigned to these various channels and information elements are not limiting in any way.

[0163] In this disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" are used interchangeably. Base stations are also sometimes referred to as macrocells, small cells, femtocells, and picocells.

[0164] A base station can accommodate one or more (for example, three) cells (also known as sectors). When a base station accommodates multiple cells, the base station's overall coverage area can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station (Remote Radio Head: RRH) for indoor use).

[0165] The terms "cell" or "sector" refer to a portion or the entire coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0166] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0167] For mobile stations, those skilled in the art sometimes also use the following terms to refer to them: 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 appropriate terms.

[0168] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does 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.

[0169] In addition, the base station in the present disclosure may also be replaced by a mobile station (user terminal, the same below). For example, regarding a structure in which the communication between a base station and a mobile station is replaced by the communication between multiple mobile stations (for example, it may also be referred to as device-to-device (D2D: Device-to-Device), vehicle-to-everything system (V2X: Vehicle-to-Everything), etc.), the various forms / implementations of the present disclosure may also be applied. In this case, it may also be a structure in which the mobile station has the functions of the base station. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0170] Likewise, the mobile station in the present disclosure may be replaced by a base station. In this case, the base station may have the same functions as the mobile station.

[0171] A radio frame can be composed of one or more frames in the time domain. In the time domain, one or more frames can be called a subframe. A subframe can be further composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) that is independent of the numerology.

[0172] A parameter set may also be a communication parameter applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set may represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by the transceiver in the frequency domain, specific windowing performed by the transceiver in the time domain, and the like.

[0173] In the time domain, a slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) A slot may be a time unit based on a parameter set.

[0174] A time slot may contain multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in time units larger than a mini-slot may be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as PDSCH (or PUSCH) mapping type B.

[0175] Radio frame, subframe, time slot, mini-time slot, and symbol all represent time units for signal transmission. Radio frame, subframe, time slot, mini-time slot, and symbol may be referred to by other corresponding names.

[0176] For example, a subframe can also be called a transmission time interval (TTI), multiple consecutive subframes can also be called a TTI, and a slot or a mini-slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. Furthermore, the unit representing a TTI may be called a slot, a mini-slot, or the like, rather than a subframe.

[0177] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules the allocation of radio resources (such as the frequency bandwidth and transmit power available to each user terminal) to each user terminal using TTIs. The definition of TTI is not limited to this.

[0178] The TTI can be the time unit for transmitting data packets (transport blocks), code blocks, code words, etc. after channel coding, and can also be the processing unit for scheduling, link adaptation, etc. In addition, when a TTI is given, the time interval (for example, the number of symbols) to which the transport blocks, code blocks, code words, etc. are actually mapped can be shorter than the TTI.

[0179] In addition, when one time slot or one mini-time slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can constitute the minimum time unit for scheduling. In addition, the number of time slots (the number of mini-time slots) constituting the minimum time unit for scheduling can be controlled.

[0180] A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a time slot, etc.

[0181] In addition, for long TTI (for example, normal TTI, subframe, etc.), it can be replaced with a TTI with a time length of more than 1ms, and for short TTI (for example, shortened TTI, etc.), it can be replaced with a TTI length that is smaller than long TTI (longTTI) and has a TTI length of more than 1ms.

[0182] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it can contain one or more contiguous subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined by the parameter set.

[0183] In addition, the time domain of an RB may include one or more symbols and may be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0184] 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, and the like.

[0185] 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.

[0186] A Bandwidth Part (BWP) (also referred to as a fractional bandwidth) can represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a carrier. Common RBs can be identified by their index relative to a common reference point for that carrier. PRBs can be defined within a BWP and numbered within that BWP.

[0187] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within a single carrier.

[0188] At least one of the configured BWPs may be active, and it is not assumed that the UE transmits or receives predetermined signals / channels outside of the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

[0189] The above-described structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the structures including the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0190] The terms "connected", "coupled" or any variation of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include situations where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used instead of "connection". As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the wireless frequency domain, microwave region and optical (visible and invisible) region may be used to "connect" or "couple" to each other.

[0191] The reference signal may be referred to as Reference Signal (RS) for short, or may be called a pilot signal depending on the applied standard.

[0192] The phrase "according to" used in this disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to."

[0193] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section,” “circuit,” “device,” or the like.

[0194] Any reference to an element using the terms "first," "second," etc., as used in this disclosure, does not necessarily limit the number or order of these elements. These terms can be used as a convenient way to distinguish between two or more elements in this disclosure. Therefore, a reference to a first element and a second element does not imply that only two elements can be used or that the first element must precede the second element in any manner.

[0195] 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, the term "or" used in this disclosure does not mean an exclusive OR.

[0196] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include cases where the noun following the article is in a plural form.

[0197] As used in this disclosure, terms such as “determining” and “determining” sometimes also include a variety of actions. “Determining” and “judging” may, for example, include considering matters such as judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (for example, searching in a table, database or other data structure), and ascertaining as matters that have been “determined” or “determined”. In addition, “determining” and “receiving” (for example, receiving information), transmitting (for example, sending information), inputting, outputting, accessing (for example, accessing data in a memory) as matters that have been “determined” or “determined”. In addition, “determining” and “resolving” may include matters such as selecting, choosing, establishing, and comparing as matters that have been “determined” or “determined”. That is, "judgment" and "decision" can include matters that are considered to have "judged" or "decided" any action. In addition, "judgment (decision)" can also be replaced by "assuming (assuming)", "expecting (expecting)", "considering (considering)", etc.

[0198] In this disclosure, the phrase "A is different from B" may also mean "A and B are different from each other." Alternatively, the phrase may also mean "A and B are each different from C." Terms such as "separate" and "combined" may also be interpreted in the same way as "different."

[0199] While the present disclosure has been described in detail above, it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in various modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes only and does not have any limiting meaning on the present disclosure.

[0200] Label Description

[0201] 10: Wireless communication system;

[0202] 20: NG-RAN;

[0203] 100: gNB;

[0204] 100A, 100B, 100C: wireless communication nodes;

[0205] 200:UE;

[0206] 210: wireless signal transceiver;

[0207] 220: magnification;

[0208] 230: Modem unit;

[0209] 240: control signal and reference signal processing unit;

[0210] 250: encoding / decoding unit;

[0211] 260: data transceiver unit;

[0212] 270: Control Department;

[0213] BM: beam;

[0214] 1001: processor;

[0215] 1002: Memory;

[0216] 1003: memory;

[0217] 1004: Communication devices;

[0218] 1005: input device;

[0219] 1006: output device;

[0220] 1007: Bus.

Claims

1. A terminal comprising: a receiving unit that receives a synchronization signal block; and a control unit configured to apply, for each of a plurality of subcarrier spacings for the high frequency band, a synchronization signal block pattern different from the subcarrier spacing for the frequency band, assuming that a high frequency band different from the frequency band including one or more frequency ranges is used; The control unit assumes that, in initial access using the high frequency band, only a portion of the plurality of subcarrier intervals is used for the synchronization signal block.

2. The terminal according to claim 1, wherein: The control unit assumes that a first subcarrier spacing also defined for the frequency band or a second subcarrier spacing defined only for the high frequency band is applied in the initial access.

3. The terminal according to claim 2, wherein: The control unit assumes that the second subcarrier spacing wider than the first subcarrier spacing is applied in the initial access.

Images