Terminal, base station, communication system, and communication method

Abstract

To perform initial access corresponding to a frequency band in a wireless communication system.SOLUTION: A terminal includes a receiving unit that receives synchronization signal blocks including a synchronization signal and a broadcast channel, and a control unit that performs a random access procedure based on system information received via the synchronization signal blocks. The receiving unit receives at least one of two of the synchronization signal blocks that are arranged at a predetermined symbol position in each slot in a frequency band to which a subcarrier spacing of 480 kHz or more is applied.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

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

[0003] NR Release 17 is considering the use of higher frequency bands than previous releases (e.g., Non-Patent Document 2). For example, in the frequency band from 52.6 GHz to 71 GHz, applicable numerology including subcarrier spacing and channel bandwidth, physical layer design, and expected interference in actual wireless communications are being considered. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V16.3.0(2020-09) [Non-patent document 2] 3GPP TS 38.306 V16.2.0(2020-09) Summary of the Invention [Problem to be solved by the invention]

[0005] In the newly operated frequency bands using higher frequencies than conventional ones, it is expected that larger sub-carrier spacing (SCS) and a larger number of beams will be used. The allocation of synchronization signals, control signals, and system information required for initial access to radio resources must be based on the allocation assumed for operation in the frequency band.

[0006] The present invention has been made in view of the above points, and makes it possible to execute initial access according to a frequency band in a wireless communication system. [Means for solving the problem]

[0007] According to the disclosed technology, a terminal is provided that has a receiving unit that receives a synchronization signal block including a synchronization signal and a broadcast channel, and a control unit that executes a random access procedure based on system information received via the synchronization signal block, wherein the receiving unit receives at least one of two synchronization signal blocks that are placed at a predetermined symbol position in each slot in a frequency band to which a subcarrier spacing of 480 kHz or more is applied. [Effects of the Invention]

[0008] According to the disclosed technology, it is possible to execute initial access according to a frequency band in a wireless communication system. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram illustrating an example of the configuration of a wireless communication system according to an embodiment of the present invention. [Figure 2] FIG. 4 is a diagram illustrating an example of a frequency range according to an embodiment of the present invention. [Figure 3] FIG. 1 is a diagram for explaining an example of an SSB structure. [Figure 4] FIG. 1 is a diagram showing an example (1) of an arrangement of SSB and RMSI. [Figure 5] FIG. 10 is a diagram showing an example (2) of SSB and RMSI arrangement. [Figure 6] FIG. 10 is a diagram showing an example (3) of SSB and RMSI arrangement. [Figure 7] 1 is a flowchart illustrating an initial access according to an embodiment of the present invention. [Figure 8] FIG. 1 is a diagram showing an example (1) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 9] FIG. 10 is a diagram showing an example (2) of arrangement of SSB and RMSI in the embodiment of the present invention. [Figure 10] FIG. 10 is a diagram showing an example (3) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 11] FIG. 10 is a diagram showing an example (4) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 12] FIG. 10 is a diagram showing an example (5) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 13] FIG. 10 is a diagram showing an example (6) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 14] FIG. 10 is a diagram showing an example (7) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 15] FIG. 8 is a diagram showing an example (8) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 16] FIG. 9 is a diagram showing an example (9) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 17] FIG. 10 is a diagram showing an example (10) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 18] FIG. 11 is a diagram showing an example (11) of arrangement of SSB and RMSI in an embodiment of the present invention. [Figure 19] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 20] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the embodiment of the present invention. [Figure 21] 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0011] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are used as appropriate. However, the existing technologies are, for example, but not limited to, the existing LTE. Furthermore, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems subsequent to LTE-Advanced (e.g., NR) unless otherwise specified.

[0012] Furthermore, in the embodiments of the present invention described below, terms used in existing LTE, such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), are used. This is for convenience of description, and similar signals, functions, etc. may be referred to by other names. Furthermore, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used in NR are not necessarily designated as "NR-".

[0013] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0014] Furthermore, in the embodiments of the present invention, when radio parameters and the like are "configured," it may mean that predetermined values ​​are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.

[0015] Fig. 1 is a diagram showing an example of the configuration of a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0016] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is, for example, transmitted via NR-PBCH and is also referred to as broadcast information. The synchronization signal and system information may be referred to as SSB (SS / PBCH block). As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 in the downlink (DL) and receives control signals or data from the terminal 20 in the uplink (UL). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to the DL or UL. In addition, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).

[0017] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10 and measures the propagation path quality based on the reception results of the reference signals.

[0018] FIG. 2 is a diagram illustrating an example of a frequency range in an embodiment of the present invention. In the NR specifications of 3GPP Release 15 and Release 16, operation of a frequency band of 52.6 GHz or higher is being considered. As shown in FIG. 2, FR (Frequency Range) 1, which is currently specified for operation, is a frequency band from 410 MHz to 7.125 GHz, with an SCS (Subcarrier Spacing) of 15, 30, or 60 kHz and a bandwidth of 5 MHz to 100 MHz. FR2 is a frequency band from 24.25 GHz to 52.6 GHz, with an SCS of 60, 120, or 240 kHz and a bandwidth of 50 MHz to 400 MHz. For example, a frequency band from 52.6 GHz to 71 GHz may be envisioned as a newly operated frequency band.

[0019] In the newly operated frequency band, up to 64 SSB beams may be supported in both licensed and unlicensed bands. Furthermore, in the initial BWP (Bandwidth Part), a 120 kHz SCS for SSB and a 120 kHz SCS for signals and channels related to initial access may be supported. Furthermore, 240 kHz, 480 kHz, and 960 kHz SCSs for SSB may be supported, and 480 kHz and 960 kHz SCSs for signals and channels related to initial access may be supported. Furthermore, in cases other than initial access, 480 kHz SCSs and 960 kHz SCSs for SSB may be supported. Note that SSB coverage enhancement may not be emphasized at present.

[0020] Fig. 3 is a diagram illustrating an example of an SSB structure. As shown in Fig. 3, an SSB is arranged within resources of 20 PRBs (Physical Resource Blocks) and 4 symbols. A PSS is arranged from PRB #4 to PRB #15 in the first symbol. An SSS is arranged from PRB #4 to PRB #15 in the third symbol. A PBCH is arranged from PRB #0 to PRB #20 in the second and fourth symbols, and from PRB #0 to PRB #3 and from PRB #16 to PRB #20 in the third symbol. Also, as shown in Fig. 3, the PBCH is accompanied by a DMRS (Demodulation Reference Signal) arranged every four symbols.

[0021] Table 1 shows the SSB symbol positions within a slot in one half frame and the SSB burst pattern.

[0022] [Table 1]

[0023] As shown in Table 1, the allocation of SSBs is set for each SCS. For example, in a 15 kHz SCS, the first symbol of an SSB is allocated to symbol #2 and symbol #8 within one slot. In licensed bands below 3 GHz, SSBs are allocated to slots #0 and #1. In licensed bands above 3 GHz, SSBs are allocated to slots #0, #1, #2, and #3. In unlicensed bands above 3 GHz, SSBs are allocated to slots #0, #1, #2, #3, and #4.

[0024] Also, for example, in one case of 30 kHz SCS, the first symbol of the SSB is placed in symbols #4, #8, #16, and #20 within two slots. In bands below 3 GHz, the SSB is placed in slot #0. In bands above 3 GHz, the SSB is placed in slots #0 and #1, and slots #2 and #3.

[0025] Also, for example, in other cases of 30 kHz SCS, the first symbol of the SSB is placed in symbol #2 and symbol #8 within one slot. In licensed bands, SSB is placed in slot #0 and slot #1, or slot #0, slot #1, slot #2 and slot #3. In unlicensed bands, SSB is placed in all slots from slot #0 to slot #9.

[0026] Also, for example, in 120 kHz SCS, within two slots, the first symbol of the SSB is placed at symbol #4, symbol #8, symbol #16, and symbol #20. SSB is placed at slot #0, slot #1, slot #2, slot #3, slot #5, slot #6, slot #7, slot #8, slot #10, slot #11, slot #12, slot #13, slot #15, slot #16, slot #17, and slot #18.

[0027] Also, for example, in 240 kHz SCS, within four slots, the first symbol of the SSB is placed at symbol #8, symbol #12, symbol #16, symbol #20, symbol #32, symbol #36, symbol #40, and symbol #44. SSB is placed at slot #0, slot #1, slot #2, slot #3, slot #5, slot #6, slot #7, and slot #8.

[0028] Fig. 4 is a diagram showing an example (1) of allocation of SSBs and RMSIs. As shown in Fig. 4, the SSBs and the PDSCH carrying CORESET (Control Resource Set) #0 and RMSI (Remaining Minimum System Information), i.e., SIB1 (System Information Block 1), may be allocated to radio resources by TDM (Time Division Multiplexing). The allocation by TDM may be supported in FR1 (Frequency Range 1) and FR2 (Frequency Range 2). Terminal 20 may receive CORESET #0 via the PDCCH.

[0029] 5 is a diagram showing an example (2) of SSB and RMSI allocation. As shown in FIG. 5, the SSB and the PDSCH carrying CORESET#0 and RMSI, i.e., SIB1, may be allocated to radio resources by TDM and FDM (Frequency Division Multiplexing). This TDM and FDM allocation may be supported in FR2 when the SCS of the SSB is twice that of the PDCCH.

[0030] 6 is a diagram showing an example (3) of SSB and RMSI allocation. As shown in FIG. 5, the SSB and the PDSCH carrying CORESET#0 and RMSI, i.e., SIB1, may be allocated to radio resources by FDM. This FDM allocation may be supported in FR2 when the SCS of the SSB is the same as the SCS of the PDCCH.

[0031] In the arrangement example shown in Figure 4 above, more symbols are used for arrangement compared to other arrangement examples, so coverage is enhanced for CORESET#0 and SIB1. The arrangement example shown in Figure 5 above does not require beam switching between receiving SSB and receiving CORESET#0 and SIB1, and is compatible with multiple numerologies. The arrangement example shown in Figure 6 above does not require beam switching between receiving SSB and receiving CORESET#0 and SIB1, and is compatible with a single numerology.

[0032] A single numerology of operation may be supported between SSB and other signals and channels for ease of implementation. For example, additional SCSs such as 480 kHz and 960 kHz may be supported in SSB as well as other signals and channels.

[0033] Therefore, for example, it is necessary to determine the format of SSB in the 480 kHz and 960 kHz SCSs, and also how to multiplex SSB, CORESET#0, and SIB1.

[0034] For example, in the SCS of 480 kHz and 960 kHz, one SSB may be allocated per slot. Also, for example, in the SCS of 480 kHz and 960 kHz, two SSBs may be allocated per slot, and a beam switching gap (i.e., a guard period) may be allocated between the SSBs. For example, in the SCS of 480 kHz and 960 kHz, the SSB burst may be determined, and the multiplexing format of the SSB and CORESET#0 may be determined.

[0035] 7 is a flowchart for explaining initial access in an embodiment of the present invention. In step S1, terminal 20 receives an SSB and performs synchronization with a cell. Furthermore, terminal 20 receives a Master Information Block (MIB) via a PBCH included in the SSB. In the following step S2, terminal 20 receives CORESET#0 via a PDCCH. In the following step S3, terminal 20 receives SIB1 based on control information included in CORESET#0. In the following step S4, terminal 20 performs initial access to base station 10 based on the received system information. The initial access may be performed by, for example, a random access procedure.

[0036] FIG. 8 is a diagram showing an example (1) of SSB and RMSI allocation in an embodiment of the present invention. As shown in FIG. 8(A), the first symbol position of an SSB may be {3}+14·n, where n=0, 1, 2, 3, ..., 63. By allocating SSBs as shown in FIG. 8(A), beam switching within a slot is not required, and the first three symbols of the slot can be used for PDCCH monitoring, not for SSB monitoring. Note that, hereinafter, it is assumed that SSBs are determined from SSB#0 to SSB#63 based on n. In FIG. 8(A), SSB#n is determined by one n.

[0037] Also, as shown in Figure 8(B), the position of the first symbol of an SSB may be {4}+14·n, where n = 0, 1, 2, 3, ..., 63. In Figure 8(B), SSB#n is determined by a single n. By arranging SSBs as in Figure 8(B), beam switching within a slot is not required, and the first three symbols of the slot can be used for PDCCH monitoring, with the following symbol being allocated to beam switching time.

[0038] Also, as shown in Figure 8(C), the first symbol position of an SSB may be {2}+14·n, where n = 0, 1, 2, 3, ..., 63. In Figure 8(C), SSB#n is determined by a single n. By arranging SSBs as in Figure 8(C), beam switching within a slot is not required, and the resources available for SIB1 can be increased.

[0039] Also, as shown in Figure 8(D), the first symbol position of an SSB may be {0}+14·n, n=0, 1, 2, 3,..., 63. In Figure 8(D), SSB#n is determined by a single n. By arranging SSBs as in Figure 8(D), beam switching within a slot is not required, and FDM with SIB1 is not required; FDM with CORESET#0 only needs to be considered.

[0040] As another example, the first symbol position of an SSB may be {3, 14, 28, 42}+56·n, where n=0, 1, 2, 3, ..., 15. In this other example, SSB#4n, SSB#(4n+1), SSB#(4n+2), and SSB#(4n+3) are determined by a single n. If PDCCH monitoring is not required due to the arrangement of the SSBs, it is possible to not consider monitoring of PDCCHs other than CORESET#0.

[0041] 9 is a diagram showing an example (2) of SSB and RMSI allocation in an embodiment of the present invention. As shown in FIG. 9(A), the first symbol position of an SSB may be {3, 8}+14·n, where n=0, 1, 2, 3, ..., 31. In FIG. 9(A), SSB#2n and SSB#(2n+1) are determined by a single n. By allocating SSBs as shown in FIG. 9(A), it is possible to reduce delays associated with beam sweeping and provide a sufficient guard period for beam switching. Furthermore, the first three symbols of a slot can be used for PDCCH monitoring, not for SSB monitoring.

[0042] As shown in Figure 9(B), the first symbol position of an SSB may be {4,9}+14·n, where n = 0, 1, 2, 3, ..., 31. In Figure 9(B), SSB#2n and SSB#(2n+1) are determined by a single n. By arranging SSBs as shown in Figure 9(B), it is possible to reduce delays associated with beam sweeping and provide a sufficient guard period for beam switching. Furthermore, the first three symbols of the slot can be used for PDCCH monitoring, and the following symbol can be allocated to beam switching time.

[0043] As shown in Figure 9(C), the first symbol position of the SSB may be {3, 10} + 14·n, where n = 0, 1, 2, 3, ..., 31. In Figure 9(C), SSB#2n and SSB#(2n+1) are determined by a single n. By arranging the SSBs as shown in Figure 9(C), it is possible to reduce delays associated with beam sweeping and provide a sufficient guard period for beam switching. Furthermore, terminal 20 can assume the same symbol position in each half slot.

[0044] As shown in Figure 9(D), the first symbol position of the SSB may be {2,9}+14·n, where n = 0, 1, 2, 3, ..., 31. In Figure 9(D), SSB#2n and SSB#(2n+1) are determined by a single n. By arranging the SSBs as shown in Figure 9(D), it is possible to reduce delays associated with beam sweeping and provide a sufficient guard period for beam switching. Furthermore, terminal 20 can assume the same symbol position in each half slot.

[0045] FIG. 10 is a diagram showing an example (3) of SSB and RMSI allocation in an embodiment of the present invention. As shown in FIG. 10, SSBs may be allocated to different symbol positions in different slots. As shown in FIG. 10, the first symbol position of an SSB may be {3, 8, 14, 21, 28, 35, 42, 49}+56·n, where n=0, 1, 2, 3, ..., 15. In FIG. 10, SSB#4n, SSB#(4n+1), SSB#(4n+2), and SSB#(4n+3) are determined by a single n. By allocating SSBs as shown in FIG. 10, it is possible to reduce delays associated with beam sweeping and provide a sufficient guard period for beam switching. Furthermore, if PDCCH monitoring is not required, it is possible to avoid considering monitoring of PDCCHs other than CORESET#0.

[0046] As another example, the first symbol position of an SSB may be {4, 8} + 14·n, where n = 0, 1, 2, 3, ..., 31. In this other example, no gaps are set between SSBs within a slot, and the structure can be similar to that of Release 15 or Release 16.

[0047] In addition, as an example of a format in which SSB bursts are consecutively transmitted in slot units, the first symbol position of the SSB may be {3}+14·n, where n=0, 1, 2, 3,..., 63. In this example, the SMTC (SS block based RRM measurement timing configuration) window can be set to a shorter period. For example, in 480 kHz SCS, the SMTC window length can be set to 2 ms, and in 960 kHz SCS, the SMTC window length can be set to 1 ms.

[0048] In addition, as an example of a format in which SSB bursts are consecutively transmitted in slot units, the first symbol position of the SSB may be {3, 8} + 14·n, where n = 0, 1, 2, 3, ..., 31. In this example, the SMTC window can be set to a shorter period. For example, in 480 kHz SCS, the SMTC window length can be 1 ms, and in 960 kHz SCS, the SMTC window length can be 0.5 ms.

[0049] As an example of a format in which SSB bursts are not consecutive by slot, the first symbol position of an SSB may be {3}+14·n, n=0,1,2,3,...,31,40,...,71. That is, n=0,1,2,3,...,31 corresponds to SSB#0 through SSB#31, and n=40,...,71 corresponds to SSB#32 through SSB#63. In this example, at least one slot that can be used entirely for data can be provided in the SMTC window. This example is similar to the setting for 120 kHz SCS or 240 kHz SCS, and a 0.25 ms period in which no SSB is provided is provided for every 1 ms of SSB burst.

[0050] FIG. 11 shows an example (4) of SSB and RMSI allocation in an embodiment of the present invention. As shown in FIG. 11, as an example of a format in which SSB bursts are not consecutive in slot units, the first symbol position of an SSB may be {3}+14·n, where n=0, 2, 4, ..., 126. That is, SSB#(n / 2) is determined by a single n. As shown in FIG. 11, at least one slot that can be used entirely for data can be provided in the SMTC window. Also, as shown in FIG. 11, an RO (Random access occasion) can be arranged immediately after each corresponding SSB.

[0051] A method for applying TDM will be described below. Fig. 12 is a diagram showing an example (5) of SSB and RMSI allocation in an embodiment of the present invention. As shown in Fig. 12, as an example of TDM without beam switching, an SSB may be allocated from symbol #3 to symbol #6, the same beam as that applied to the SSB may be applied to CORESET #0 allocated from symbol #0 to symbol #2, and the same beam as that applied to the SSB may be applied to SIB1 allocated from symbol #3 to symbol #12. With the allocation shown in Fig. 12, beam switching between the SSB and CORESET #0 and SIB1 is not required, and more symbols can be allocated to CORESET #0 and SIB1. Furthermore, terminal 20 can transmit the SSB, CORESET #0, and SIB1 by a single beam sweep.

[0052] Also, as an example of TDM without beam switching, SIB1 resources may be determined based on SSB resources. For example, in a symbol in which an SSB is transmitted, RBs used by the SSB of that symbol may not be used by SIB1, and RBs not used by the SSB of that symbol may be used by SIB1. In a symbol in which no SSB is transmitted, the frequency resources of SIB1 may be determined according to notification by CORESET#0. This example allows for efficient use of frequency resources, taking into account the larger RB size associated with a larger SCS.

[0053] 13 is a diagram showing an example (6) of SSB and RMSI allocation in an embodiment of the present invention. As shown in FIG. 13, as an example of TDM without beam switching, an SSB may be allocated from symbol #0 to symbol #3, the same beam as that applied to the SSB may be applied to CORESET#0 allocated from symbol #0 to symbol #3, and the same beam as that applied to the SSB may be applied to SIB1 allocated from symbol #4 to symbol #12. With the allocation shown in FIG. 12, beam switching between the SSB and CORESET#0 and SIB1 is not required, and more symbols can be allocated to CORESET#0 and SIB1. Furthermore, terminal 20 can transmit the SSB, CORESET#0, and SIB1 by a single beam sweep.

[0054] The method of applying FDM will be described below. FDM may be applied between different numerologies (i.e., different SCSs). For example, FDM may be applied to any combination of 120, 240, 480, and 960 kHz SCSs. Furthermore, CORESET#0 and SIB1 may be frequency-multiplexed with SSBs. Furthermore, CORESET#0 may be frequency-multiplexed with SSBs.

[0055] Furthermore, the number of symbols in CORESET#0 and the number of symbols in SIB1 may be the same or different. The number of symbols in CORESET#0 and the number of symbols in SIB1 may be determined based on notification. For example, the number of symbols in CORESET#0 and the number of symbols in SIB1 may be notified by the information element pdcch-ConfigSIB1 included in the PBCH. CORESET#0 and / or SIB1 may be arranged to cross or not cross a slot boundary in the SCS applied to CORESET#0.

[0056] Figure 14 is a diagram showing an example (7) of SSB and RMSI allocation according to an embodiment of the present invention. In the example shown in Figure 14, the SCS applied to the SSB is 120 kHz, and the SCS applied to CORESET#0 and SIB1 is 480 kHz. Figure 14 shows an example in which, in a 480 kHz SCS carrier, 8 symbols are allocated to CORESET#0 and 8 symbols to SIB1, and in the same period, a 4-symbol SSB is allocated to a 120 kHz carrier.

[0057] For example, with the first symbol of a 480 kHz SCS half frame being symbol #0, CORESET#0 may be allocated from symbol #12 to symbol #19, and SIB1 may be allocated from symbol #20 to symbol #27. For example, with the first symbol of a 120 kHz SCS half frame being symbol #0, SSB#0 may be allocated from symbol #3 to symbol #6. Note that the same beam as SSB#0 may be applied to CORESET#0 and SIB1.

[0058] By arranging the SSB, CORESET#0, and SIB1 as shown in FIG. 14, it is not necessary to switch beams between the SSB and CORESET#0 and SIB1, and the delay associated with decoding SIB1 can be reduced.

[0059] Fig. 15 is a diagram showing an example (8) of SSB and RMSI allocation in an embodiment of the present invention. In a 480 kHz SCS carrier, m symbols may be allocated to CORESET#0 and n symbols to SIB1, and the allocation may be such that m+n=16. In the example shown in Fig. 15, the SCS applied to the SSB is 120 kHz, and the SCS applied to CORESET#0 and SIB1 is 480 kHz. Fig. 15 shows an example in which 4 symbols are allocated to CORESET#0 and 12 symbols to SIB1 in a 480 kHz SCS carrier, and 4 SSB symbols are allocated to the 120 kHz carrier in the same period.

[0060] For example, with symbol #0 as the first symbol of a half frame of 480 kHz SCS, CORESET #0 may be allocated from symbol #12 to symbol #15, and SIB1 may be allocated from symbol #16 to symbol #27. For example, with symbol #0 as the first symbol of a half frame of 120 kHz SCS, SSB #0 may be allocated from symbol #3 to symbol #6. Note that the same beam as SSB #0 may be applied to CORESET #0 and SIB1.

[0061] The above m and n may be determined by any one or a combination of 1) to 4) shown below.

[0062] 1) The slot boundary of the SCS (i.e., 480 kHz) applied to CORESET#0. 2) The ratio of the number of payload bits of CORESET#0 to the number of payload bits of SIB1. For example, more symbols may be allocated to a channel with a larger number of payload bits. 3) Notification via PBCH. For example, pdcch-ConfigSIB1 may be reused. 4) Notification by SSB index.

[0063] By arranging the SSB, CORESET#0, and SIB1 as shown in FIG. 15, it is not necessary to switch beams between the SSB and CORESET#0 and SIB1, and the delay associated with decoding SIB1 can be reduced.

[0064] Figure 16 is a diagram showing an example (9) of SSB and RMSI allocation in an embodiment of the present invention. In a 480 kHz SCS carrier, m symbols are allocated to CORESET#0 and n symbols are allocated to SIB1, and the total symbols of CORESET#0 and SIB1 may be allocated so that they do not coincide with the period of the SSB. In the example shown in Figure 16, the SCS applied to the SSB is 120 kHz, and the SCS applied to CORESET#0 and SIB1 is 480 kHz. Figure 16 shows an example in which 12 symbols are allocated to CORESET#0 and 16 symbols are allocated to SIB1 in a 480 kHz SCS carrier, and a 4-symbol SSB is allocated to the 120 kHz carrier in the same period as SIB1.

[0065] For example, with symbol #0 as the first symbol of a half frame of 480 kHz SCS, CORESET #0 may be allocated from symbol #0 to symbol #11, and SIB1 may be allocated from symbol #12 to symbol #27. For example, with symbol #0 as the first symbol of a half frame of 120 kHz SCS, SSB #0 may be allocated from symbol #3 to symbol #6. Note that the same beam as SSB #0 may be applied to CORESET #0 and SIB1.

[0066] 16 shows an example in which m = 12 and n = 16. m and n may be determined by any one or a combination of 1) to 4) below.

[0067] 1) The slot boundary of the SCS (i.e., 480 kHz) applied to CORESET#0. 2) The ratio of the number of payload bits of CORESET#0 to the number of payload bits of SIB1. For example, more symbols may be allocated to a channel with a larger number of payload bits. 3) Notification via PBCH. For example, pdcch-ConfigSIB1 may be reused. 4) Notification by SSB index.

[0068] By arranging the SSB, CORESET#0, and SIB1 as shown in FIG. 16, it is not necessary to switch beams between the SSB, CORESET#0, and SIB1, and the delay associated with decoding SIB1 can be reduced.

[0069] As an example of SSB and RMSI allocation, in FIG. 16, SSB may be allocated to symbols #0 to #3, and the SSB may be frequency-multiplexed with symbols #0-#11 of CORESET#0 and symbols #12-#15 of SIB1.

[0070] 16, as an example of the arrangement of SSB and RMSI, SSB may be arranged from symbol #0 to symbol #3 and frequency-multiplexed with symbols #0-#11 of CORESET#0, and SIB1 may be arranged from symbol #16 to symbol #31 without being frequency-multiplexed with SSB. Furthermore, CORESET#0 may be arranged from symbols #0-#15.

[0071] Figure 17 is a diagram showing an example (10) of SSB and RMSI allocation in an embodiment of the present invention. In a 960 kHz SCS carrier, m symbols may be allocated to CORESET#0 and n symbols to SIB1, and the allocation may be such that m+n=32. In the example shown in Figure 175, the SCS applied to the SSB is 120 kHz, and the SCS applied to CORESET#0 and SIB1 is 960 kHz. Figure 17 shows an example in which 16 symbols are allocated to CORESET#0 and 16 symbols to SIB1 in a 960 kHz SCS carrier, and 4 SSB symbols are allocated to a 120 kHz carrier in the same period.

[0072] For example, with symbol #0 as the first symbol of a half frame of 960 kHz SCS, CORESET #0 may be allocated from symbol #24 to symbol #39, and SIB1 may be allocated from symbol #40 to symbol #55. For example, with symbol #0 as the first symbol of a half frame of 120 kHz SCS, SSB #0 may be allocated from symbol #3 to symbol #6. Note that the same beam as SSB #0 may be applied to CORESET #0 and SIB1.

[0073] 17 shows an example in which m = 16 and n = 16. m and n may be determined by any one or a combination of 1) to 4) shown below.

[0074] 1) The slot boundary of the SCS (i.e., 960 kHz) applied to CORESET#0. 2) The ratio of the number of payload bits of CORESET#0 to the number of payload bits of SIB1. For example, more symbols may be allocated to a channel with a larger number of payload bits. 3) Notification via PBCH. For example, pdcch-ConfigSIB1 may be reused. 4) Notification by SSB index.

[0075] By arranging the SSB, CORESET#0, and SIB1 as shown in FIG. 17, it is not necessary to switch beams between the SSB and CORESET#0 and SIB1, and the delay associated with decoding SIB1 can be reduced.

[0076] Figure 18 is a diagram showing an example (11) of SSB and RMSI allocation in an embodiment of the present invention. In a 960 kHz SCS carrier, m symbols are allocated to CORESET#0 and n symbols are allocated to SIB1, and the total symbols of CORESET#0 and SIB1 may be allocated so that they do not coincide with the period of the SSB. In the example shown in Figure 18, the SCS applied to the SSB is 120 kHz, and the SCS applied to CORESET#0 and SIB1 is 960 kHz. Figure 18 shows an example in which 24 symbols are allocated to CORESET#0 and 32 symbols are allocated to SIB1 in a 960 kHz SCS carrier, and a 4-symbol SSB is allocated to the 120 kHz carrier in the same period as SIB1.

[0077] For example, with symbol #0 as the first symbol of a half frame of 960 kHz SCS, CORESET #0 may be allocated from symbol #0 to symbol #23, and SIB1 may be allocated from symbol #24 to symbol #55. For example, with symbol #0 as the first symbol of a half frame of 120 kHz SCS, SSB #0 may be allocated from symbol #3 to symbol #6. Note that the same beam as SSB #0 may be applied to CORESET #0 and SIB1.

[0078] 18 shows an example in which m = 24 and n = 32. m and n may be determined by any one or a combination of 1) to 4) below.

[0079] 1) The slot boundary of the SCS (i.e., 480 kHz) applied to CORESET#0. 2) The ratio of the number of payload bits of CORESET#0 to the number of payload bits of SIB1. For example, more symbols may be allocated to a channel with a larger number of payload bits. 3) Notification via PBCH. For example, pdcch-ConfigSIB1 may be reused. 4) Notification by SSB index.

[0080] By arranging the SSB, CORESET#0, and SIB1 as shown in FIG. 18, it is not necessary to switch beams between the SSB, CORESET#0, and SIB1, and the delay associated with decoding SIB1 can be reduced.

[0081] As an example of SSB and RMSI allocation, in FIG. 18, SSB may be allocated to symbols #0 to #3, and the SSB may be frequency-multiplexed with symbols #0-#23 of CORESET#0 and symbols #24-#31 of SIB1.

[0082] 18, SSB may be allocated to symbols #0 to #3 and frequency-multiplexed with symbols #0 to #23 of CORESET #0, and SIB1 may be allocated to symbols #32 to #63 without being frequency-multiplexed with SSB. Furthermore, CORESET #0 may be allocated to symbols #0 to #31.

[0083] According to the above-described embodiment, when communicating in a frequency band to which a larger SCS than conventionally is applied, the base station 10 and the terminal 20 can allocate SSB, CORESET#0, and SIB1 to radio resources, taking into consideration delays involved in decoding SIB1, beam switching, SMTC window size, frequency resource allocation, etc. Furthermore, the base station 10 and the terminal 20 can flexibly allocate symbols to CORESET#0 and SIB1.

[0084] That is, in a wireless communication system, initial access can be performed according to the frequency band.

[0085] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions of the embodiments.

[0086] <Base station 10> Fig. 19 is a diagram showing an example of the functional configuration of base station 10 in the embodiment of the present invention. As shown in Fig. 19, base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 19 is merely an example. The functional divisions and names of the functional units may be any names as long as they can perform the operations related to the embodiment of the present invention.

[0087] The transmitter 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The transmitter 110 also transmits inter-network node messages to other network nodes. The receiver 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of higher layers from the received signals. The transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. The receiver 120 also receives inter-network node messages from other network nodes.

[0088] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information relating to settings for initial access.

[0089] As described in the embodiments, the control unit 140 controls the setting of the initial access. The control unit 140 also executes scheduling. The signal transmission-related functional unit of the control unit 140 may be included in the transmitting unit 110, and the signal reception-related functional unit of the control unit 140 may be included in the receiving unit 120.

[0090] <Terminal 20> Fig. 20 is a diagram showing an example of the functional configuration of terminal 20 in the embodiment of the present invention. As shown in Fig. 20, terminal 20 has transmitting unit 210, receiving unit 220, setting unit 230, and control unit 240. The functional configuration shown in Fig. 20 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention.

[0091] The transmitter 210 creates a transmission signal from transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, and the like transmitted from the base station 10. For example, the transmitter 210 transmits a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), and the like to another terminal 20 as D2D communication, and the receiver 220 receives the PSCCH, PSSCH, PSDCH, or PSBCH, and the like, from the other terminal 20.

[0092] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores setting information that is set in advance. The setting information includes, for example, information related to settings for initial access.

[0093] As described in the embodiment, the control unit 240 controls the setting of the initial access. The function unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the function unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0094] (Hardware configuration) The block diagrams (FIGS. 19 and 20) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0095] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0096] For example, the base station 10, the terminal 20, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 21 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0097] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0098] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0099] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0100] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 19 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 20 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0101] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0102] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0103] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0104] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0105] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0106] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0107] (Summary of the embodiment) As described above, according to an embodiment of the present invention, there is provided a terminal having a receiving unit that receives a block including a synchronization signal and a broadcast channel, a control channel that carries control information, and a shared channel that carries system information by applying a single beamforming, and a control unit that performs initial access based on the system information, in which the block and at least one of the control channel and the shared channel are frequency multiplexed, and the control channel and the shared channel are time multiplexed.

[0108] With the above configuration, when communicating in a frequency band to which a larger SCS than conventional ones is applied, the base station 10 and the terminal 20 can allocate the SSB, CORESET#0, and SIB1 to radio resources, taking into consideration delays associated with decoding SIB1, beam switching, SMTC window size, frequency resource allocation, etc. Furthermore, the base station 10 and the terminal 20 can flexibly allocate symbols to CORESET#0 and SIB1. That is, in the wireless communication system, initial access can be performed according to the frequency band.

[0109] The block may be frequency-multiplexed with both the control channel and the shared channel, and the subcarrier spacing of the block may be four or eight times the subcarrier spacing of the control channel and the shared channel. With this configuration, when communicating in a frequency band to which a larger SCS than conventional ones is applied, the base station 10 and the terminal 20 can allocate SSB, CORESET#0, and SIB1 to radio resources, taking into consideration delays associated with decoding SIB1, beam switching, SMTC window size, frequency resource allocation, etc. Furthermore, the base station 10 and the terminal 20 can flexibly allocate symbols to CORESET#0 and SIB1.

[0110] The blocks and the shared channel may be frequency-multiplexed, the blocks and the control channel may not be frequency-multiplexed, and the subcarrier spacing of the blocks may be four or eight times the subcarrier spacing of the control channel and the shared channel. With this configuration, when communicating in a frequency band to which a larger SCS than conventional ones is applied, the base station 10 and the terminal 20 can allocate SSB, CORESET#0, and SIB1 to radio resources, taking into account delays associated with decoding SIB1, beam switching, SMTC window size, frequency resource allocation, etc. Furthermore, the base station 10 and the terminal 20 can flexibly allocate symbols to CORESET#0 and SIB1.

[0111] The time domain resources allocated to the control channel and the time domain resources allocated to the shared channel may be determined based on the slot boundary of the block or the ratio of the payload of the control channel to the payload of the control channel. With this configuration, when communicating in a frequency band to which a larger SCS than conventional ones is applied, the base station 10 and the terminal 20 can allocate SSB, CORESET#0, and SIB1 to radio resources, taking into account delays associated with decoding SIB1, beam switching, SMTC window size, frequency resource allocation, etc. Furthermore, the base station 10 and the terminal 20 can flexibly allocate symbols to CORESET#0 and SIB1.

[0112] Furthermore, according to an embodiment of the present invention, there is provided a base station having a transmitting unit that transmits a block including a synchronization signal and a broadcast channel, a control channel carrying control information, and a shared channel carrying system information by applying a single beamforming, and a control unit that performs initial access based on the system information, wherein the block and at least one of the control channel and the shared channel are frequency multiplexed, and the control channel and the shared channel are time multiplexed.

[0113] With the above configuration, when communicating in a frequency band to which a larger SCS than conventional ones is applied, the base station 10 and the terminal 20 can allocate the SSB, CORESET#0, and SIB1 to radio resources, taking into consideration delays associated with decoding SIB1, beam switching, SMTC window size, frequency resource allocation, etc. Furthermore, the base station 10 and the terminal 20 can flexibly allocate symbols to CORESET#0 and SIB1. That is, in the wireless communication system, initial access can be performed according to the frequency band.

[0114] Furthermore, according to an embodiment of the present invention, a communication method is provided in which a terminal executes a reception procedure for receiving a block including a synchronization signal and a broadcast channel, a control channel carrying control information, and a shared channel carrying system information by applying a single beamforming, and a control procedure for performing initial access based on the system information, in which the block and at least one of the control channel and the shared channel are frequency-multiplexed, and the control channel and the shared channel are time-multiplexed.

[0115] With the above configuration, when communicating in a frequency band to which a larger SCS than conventional ones is applied, the base station 10 and the terminal 20 can allocate the SSB, CORESET#0, and SIB1 to radio resources, taking into consideration delays associated with decoding SIB1, beam switching, SMTC window size, frequency resource allocation, etc. Furthermore, the base station 10 and the terminal 20 can flexibly allocate symbols to CORESET#0 and SIB1. That is, in the wireless communication system, initial access can be performed according to the frequency band.

[0116] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0117] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0118] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark), IEEE 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) may also be applied.

[0119] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0120] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0121] The information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0122] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0123] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0124] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0125] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0126] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0127] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0128] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0129] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0130] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0131] In the present disclosure, terms such as "base station (BS)," "radio base station," "base station device," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0132] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0133] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0134] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0135] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, or the mobile body itself. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0136] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0137] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0138] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0139] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0140] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0141] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0142] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0143] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0144] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0145] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0146] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0147] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0148] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0149] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0150] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0151] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0152] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0153] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0154] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0155] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0156] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0157] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0158] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0159] 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.

[0160] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0161] 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 one carrier.

[0162] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0163] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0164] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0165] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0166] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0167] In the present disclosure, an SSB is an example of a block including a synchronization signal and a broadcast channel.

[0168] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure.

[0169] <Additional Notes> (Additional note 1) a receiving unit that receives a block including a synchronization signal and a broadcast channel, a control channel that carries control information, and a shared channel that carries system information by applying a single beamforming; a control unit that executes initial access based on the system information; A terminal in which the block and at least one of the control channel and the shared channel are frequency-multiplexed, and the control channel and the shared channel are time-multiplexed. (Additional note 2) The terminal according to appended claim 1, wherein the block is frequency-multiplexed with both the control channel and the shared channel, and the subcarrier spacing of the block is four or eight times the subcarrier spacing of the control channel and the shared channel. (Additional note 3) The terminal according to Supplementary Item 1, wherein the block and the shared channel are frequency-multiplexed, the block and the control channel are not frequency-multiplexed, and the subcarrier spacing of the block is four or eight times the subcarrier spacing of the control channel and the shared channel. (Additional note 4) The terminal according to claim 2 or 3, wherein the time domain resources allocated to the control channel and the time domain resources allocated to the shared channel are determined based on a slot boundary of the block or a ratio of the payload of the control channel to the payload of the control channel. (Additional note 5) a transmitter that transmits a block including a synchronization signal and a broadcast channel, a control channel that carries control information, and a shared channel that carries system information by applying a single beamforming; a control unit that executes initial access based on the system information; A base station in which the blocks and at least one of the control channel and the shared channel are frequency-multiplexed, and the control channel and the shared channel are time-multiplexed. (Additional note 6) a receiving procedure for receiving a block including a synchronization signal and a broadcast channel, a control channel carrying control information, and a shared channel carrying system information by applying a single beamforming; a control procedure for performing initial access based on the system information; A communication method in which the blocks and at least one of the control channel and the shared channel are frequency multiplexed, and the control channel and the shared channel are time multiplexed. [Explanation of symbols]

[0170] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device

Claims

1. a receiver for receiving a synchronization signal block including a synchronization signal and a broadcast channel; a control unit that executes a random access procedure based on system information received via the synchronization signal block; A terminal, wherein the receiving unit receives at least one of the two synchronization signal blocks arranged at a predetermined symbol position in each slot in a frequency band to which a subcarrier spacing of 480 kHz or more is applied.

2. 2. The terminal of claim 1, wherein the two synchronization signal blocks are arranged over 32 consecutive slots.

3. receiving at least one of two synchronization signal blocks arranged at a predetermined symbol position of each slot in a frequency band to which a subcarrier spacing of 480 kHz or more is applied; performing a random access procedure based on system information received via the synchronization signal block; The synchronization signal block includes a synchronization signal and a broadcast channel.

4. a transmitter for transmitting a synchronization signal block including a synchronization signal and a broadcast channel; a control unit that assumes that a terminal executes a random access procedure based on system information transmitted through the synchronization signal block; A base station, wherein the transmitter transmits two of the synchronization signal blocks to be placed at predetermined symbol positions in each slot in a frequency band to which a subcarrier spacing of 480 kHz or more is applied.

5. A communication system having a terminal and a base station, The terminal a receiving unit for receiving a synchronization signal block including a synchronization signal and a broadcast channel from the base station; a control unit that executes a random access procedure to the base station based on system information received via the synchronization signal block; the receiving unit receives, from the base station, at least one of the two synchronization signal blocks arranged at a predetermined symbol position of each slot in a frequency band to which a subcarrier spacing of 480 kHz or more is applied; The base station a transmitter that transmits the synchronization signal block to the terminal; a control unit that assumes that the terminal executes a random access procedure based on the system information; The transmitting unit transmits the two synchronization signal blocks to the terminal in the frequency band.

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