Terminal

Abstract

To provide a terminal capable of correctly recognizing a control resource set to be mapped to a SSB even in the case where a plurality of SSBs of which a QCL assumption is different is transmitted.SOLUTION: A terminal receives a synchronous signal block (SSB) in a different frequency band that is different from a frequency band containing one or a plurality of frequency ranges. Also, the terminal receives a system information block (SIB) by using a control resource set (CORESET) that is associated to the synchronous signal block. The terminal is transmitted by using a same time position or a same frequency position from a network, and receives at least one of the plurality of synchronous signal blocks of which a pseudo collocation assumption is different. Also, the terminal is transmitted by using the same time position or the same frequency position, and uses at least any one of the plurality of control resource sets of which the pseudo collocation assumption is different.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a terminal for performing wireless communication, and in particular to a terminal for receiving synchronization signal blocks (SSBs). [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP) has specified Long Term Evolution (LTE) and is also working on specifications for LTE-Advanced (hereinafter, LTE-Advanced will be referred to as LTE) with the aim of further increasing the speed of LTE, as well as the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)).

[0003] 3GPP Release 15 and Release 16 (NR) specify operation in bands including FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). Specifications for Release 16 and later also consider operation in bands above 52.6 GHz (Non-Patent Document 1). The target frequency range in the Study Item (SI) is 52.6 GHz to 114.25 GHz.

[0004] At such very high carrier frequencies, increased phase noise and propagation loss become a problem, and the system becomes more sensitive to peak-to-average power ratio (PAPR) and power amplifier nonlinearities.

[0005] In NR, initial access, cell detection, and reception quality measurement are performed using SSBs (SS / PBCH Blocks) consisting of a synchronization signal (SS) and a downlink physical broadcast channel (PBCH) (see Non-Patent Document 2). The transmission period of the SSB can be set for each cell within the range of 5, 10, 20, 40, 80, or 160 milliseconds (assuming that the initial access terminal (User Equipment, UE) has a transmission period of 20 milliseconds).

[0006] The transmission of SSBs within a transmission period is limited to 5 ms (half frame), and each SSB can correspond to a different beam. In Release 15, the number of SSB indices is 64 (indexes 0 to 63).

[0007] Furthermore, when the terminal determines, based on the received Master Information Block (MIB), that there is a control resource set (CORESET) for a Type 0-PDCCH Common Search Space (CSS) set, the terminal determines several consecutive resource blocks (RBs) and symbols for the CORESET (which may also be referred to as a Remaining Minimum System Information (RMSI) CORESET) (Non-Patent Document 3). Based on the determined RBs and symbols, the terminal sets a downlink control channel (PDCCH: Physical Downlink Control Channel), specifically, a monitoring occasion (MO) of a Type 0 PDCCH for decoding a system information block (SIB). [Prior art documents] [Non-patent literature]

[0008] [Non-Patent Document 1] 3GPP TR 38.807 V0.1.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on requirements for NR beyond 52.6 GHz (Release 16), 3GPP, March 2019 [Non-patent document 2] 3GPP TS 38.133 V15.5.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Requirements for support of radio resource management (Release 15), 3GPP, March 2019 [Non-patent document 3] 3GPP TS 38.213 V15.5.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for control (Release 15), 3GPP, March 2019 Summary of the Invention [Problem to be solved by the invention]

[0009] When using a frequency band different from FR1 / FR2, such as a high frequency band exceeding 52.6 GHz as described above, it is necessary to generate a narrower beam using a massive antenna with many antenna elements to accommodate the wide bandwidth and large propagation loss.

[0010] That is, a large number of beams are required to cover a given geographic area.

[0011] Therefore, in order to reduce the overhead associated with SSB signaling and reduce data scheduling delays, SSB detection and measurement time, and power consumption, it is possible to simultaneously transmit multiple SSBs with different Quasi Co-Location (QCL) assumptions from the network to the terminal using the same time or frequency location.

[0012] However, Release 15 specifies that the mapping from SSBs to Type 0 PDCCH MO is one-to-one, and that SSBs with different QCL assumptions are time-division multiplexed (TDM). Therefore, when multiple SSBs with different QCL assumptions are transmitted simultaneously, the question of how to map the Type 0 PDCCH MO arises.

[0013] Therefore, the present invention has been made in consideration of such circumstances, and aims to provide a terminal that can correctly recognize the control resource set to which the SSB is mapped, even when multiple SSBs with different QCL assumptions are transmitted. [Means for solving the problem]

[0014] One aspect of the present disclosure is a terminal (UE200) comprising a first receiving unit (radio signal transceiver unit 210) that receives a synchronization signal block (SSB) in a different frequency band (e.g., FR4) that is different from a frequency band including one or more frequency ranges (FR1, FR2), and a second receiving unit (radio signal transceiver unit 210) that receives a system information block (SIB) using a control resource set (CORESET) associated with the synchronization signal block, wherein the first receiving unit receives at least one of a plurality of the synchronization signal blocks that are transmitted from a network using the same time position or the same frequency position and have different quasi-colocation assumptions, and the second receiving unit uses at least one of the plurality of control resource sets that are transmitted using the same time position or the same frequency position and have different quasi-colocation assumptions.

[0015] One aspect of the present disclosure is a terminal (UE200) comprising a first receiving unit (radio signal transceiver unit 210) that receives a synchronization signal block (SSB) in a different frequency band (e.g., FR4) that is different from a frequency band including one or more frequency ranges (FR1, FR2), and a second receiving unit (radio signal transceiver unit 210) that receives a system information block (SIB) using a control resource set (CORESET) associated with the synchronization signal block, wherein the first receiving unit receives at least one of a plurality of the synchronization signal blocks having different quasi-colocation assumptions from a network, and the second receiving unit uses at least one of the plurality of control resource sets that are transmitted from the network by time division multiplexing and have different quasi-colocation assumptions.

[0016] One aspect of the present disclosure is a terminal (UE200) comprising: a first receiving unit that receives a system information block (SIB) using a control resource set (CORESET) associated with a synchronization signal block (SSB) when using a frequency band including one or more frequency ranges (FR1, FR2); and a control unit (control unit 270) that determines not to use the system information block when the network is in non-standalone operation and uses a frequency band different from the frequency band. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram showing the overall schematic configuration of a wireless communication system 10. As shown in FIG. [Figure 2] FIG. 2 is a diagram showing frequency ranges used in the wireless communication system 10. As shown in FIG. [Figure 3] FIG. 3 is a diagram showing an example of the configuration of a radio frame, a subframe, and a slot used in the radio communication system 10. As shown in FIG. [Figure 4] FIG. 4 is a diagram showing an example of the configuration of an SSB burst. [Figure 5] FIG. 5 is a diagram showing an example of the arrangement of some SSBs when the number of SSBs is expanded to a value exceeding 64. [Figure 6]FIG. 6 is a diagram showing an example of the configuration of a synchronization signal block (SSB). [Figure 7] FIG. 7 is an explanatory diagram of an example of allocation of SSBs on a radio frame and the relationship with beams BM. [Figure 8] FIG. 8 is a diagram showing an example of setting CORESET, SSB, and PDSCH. [Figure 9] FIG. 9 is a diagram illustrating an example of the configuration of a Type 0 PDCCH MO. [Figure 10] FIG. 10 is a functional block diagram of the UE 200. [Figure 11] FIG. 11 is a diagram showing an example of the configuration of an SSB burst when 256 SSBs are transmitted sequentially rather than simultaneously. [Figure 12] FIG. 12 is a diagram showing an example of the configuration of an SSB burst when multiple SSBs are simultaneously transmitted according to the first operational example. [Figure 13] FIG. 13 is a diagram showing another example of the configuration of an SSB burst when multiple SSBs are simultaneously transmitted according to the first operational example. [Figure 14] FIG. 14 is a diagram showing an example (part 1) of association between SSB and CORESET in operation example 2-1. [Figure 15] FIG. 15 is a diagram showing an example (part 2) of association between SSB and CORESET in operation example 2-1. [Figure 16] FIG. 16 is a diagram showing an example of association between SSB and CORESET in operation example 2-2. [Figure 17] FIG. 17 is a diagram showing an example of association between SSB and CORESET in operation example 2-2-2. [Figure 18] FIG. 18 is a diagram showing an example of association between SSB and CORESET in operation example 2-2-3. [Figure 19] FIG. 19 is a diagram illustrating an example of a hardware configuration of the UE 200. As shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or similar reference numerals are used to designate the same functions or configurations, and descriptions thereof will be omitted as appropriate.

[0019] (1) Overall configuration of wireless communication system 1 is a schematic diagram of the overall configuration of a wireless communication system 10 according to this embodiment. The wireless communication system 10 is a wireless communication system conforming to 5G New Radio (NR) and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20) and a terminal 200 (hereinafter, UE 200).

[0020] The NG-RAN 20 includes a radio base station 100 (hereinafter, gNB 100). Note that the specific configuration of the radio communication system 10, including the number of gNBs and UEs, is not limited to the example shown in FIG.

[0021] The NG-RAN 20 actually includes multiple NG-RAN nodes, specifically, gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). The NG-RAN 20 and the 5GC may also be simply referred to as a "network."

[0022] The gNB 100 is a radio base station conforming to 5G, and performs 5G radio communication with the UE 200. The gNB 100 and the UE 200 are capable of supporting Massive MIMO (Multiple-Input Multiple-Output), which generates a more directional beam BM by controlling radio signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which aggregates and uses multiple component carriers (CCs), and Dual Connectivity (DC), which simultaneously communicates between the UE and each of two NG-RAN nodes.

[0023] The wireless communication system 10 also supports a plurality of frequency ranges (FR).

[0024] 2, the wireless communication system 10 supports FR1 and FR2. The frequency bands of each FR are as follows:

[0025] FR1: 410 MHz to 7.125 GHz FR2: 24.25 GHz~52.6 GHz FR1 uses a Sub-Carrier Spacing (SCS) of 15, 30, or 60 kHz and a bandwidth (BW) of 5 to 100 MHz. FR2 is a higher frequency than FR1, using an SCS of 60 or 120 kHz (240 kHz may be included) and a bandwidth (BW) of 50 to 400 MHz.

[0026] Note that SCS may be interpreted as numerology, which is defined in 3GPP TS38.300 and corresponds to one subcarrier spacing in the frequency domain.

[0027] 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 114.25 GHz. For convenience, this high frequency band is referred to as "FR4" here. FR4 belongs to the so-called EHF (extremely high frequency, also known as millimeter wave). Note that FR4 is a tentative name, and it may be called by a different name.

[0028] FR4 may also be further divided. For example, FR4 may be divided into a frequency range below 70 GHz and a frequency range above 70 GHz. Alternatively, FR4 may be divided into more frequency ranges or may be divided at frequencies other than 70 GHz.

[0029] For convenience, the frequency band between FR1 and FR2 is referred to as "FR3." FR3 is the frequency band above 7.125 GHz and below 24.25 GHz.

[0030] In this embodiment, FR3 and FR4 are different from the frequency band including FR1 and FR2, and are referred to as different frequency bands.

[0031] In particular, in high frequency bands such as FR4, the increase in inter-carrier phase noise becomes a problem, as mentioned above, which may necessitate the application of a larger (wider) SCS or a single carrier waveform.

[0032] Also, narrower beams (i.e., more beams) may be required due to increased propagation loss, and greater sensitivity to PAPR and power amplifier nonlinearities may require larger (wider) SCS (and / or fewer FFT points), PAPR reduction mechanisms, or single-carrier waveforms.

[0033] To solve this problem, in this embodiment, when using a band above 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM) with a larger Sub-Carrier Spacing (SCS) may be applied.

[0034] However, the larger the SCS, the shorter the symbol / cyclic prefix (CP) duration and slot duration (if the 14 symbol / slot configuration is maintained).

[0035] 3 shows an example of the configuration of a radio frame, a subframe, and a slot used in the radio communication system 10. Table 1 shows the relationship between the SCS and the symbol period.

[0036] [Table 1]

[0037] As shown in Table 1, if the 14 symbol / slot configuration is maintained, the larger (wider) the SCS, the shorter the symbol period (and slot period), and the shorter the time domain period of the SS / PBCH Block (SSB).

[0038] An example of the configuration of an SSB burst is shown in Figure 4. An SSB is a block of synchronization signals / broadcast channels consisting of an SS (Synchronization Signal) and a PBCH (Physical Broadcast Channel).

[0039] The SSB is mainly transmitted periodically to allow the UE 200 to detect the cell ID and reception timing when starting communication. In 5G, the SSB is also used to measure the reception quality of each cell.

[0040] In Release 15, the following is specified for the SSB configuration of the serving cell. Specifically, the SSB transmission periodicity is specified as 5, 10, 20, 40, 80, and 160 milliseconds. Note that the initial access UE 200 is assumed to have a transmission period of 20 milliseconds.

[0041] The network (NG-RAN 20) notifies the UE 200 of the index indication (ssb-PositionsInBurst) of the actually transmitted SSBs by system information (SIB1) or signaling of the radio resource control layer (RRC).

[0042] Specifically, in the case of FR1, it is notified by an 8-bit bitmap of RRC and SIB1, and in the case of FR2, it is notified by a 64-bit bitmap of RRC, an 8-bit bitmap of SSBs in a group in SIB1, and an 8-bit group bitmap.

[0043] Furthermore, as mentioned above, in order to support FR4 (high frequency band), a large bandwidth and large propagation loss require a massive antenna with many antenna elements to generate narrower beams, i.e., a large number of beams are required to cover a certain geographical area.

[0044] In Release 15 (FR2), the maximum number of beams used for SSB transmission is 64, but it may be desirable to extend the maximum number of beams (for example, to 256) to cover a certain geographic area with narrow beams.

[0045] Therefore, in this embodiment, the maximum number of beams used for SSB transmission is extended to 256. Therefore, the number of SSBs also becomes 256, and values ​​from #64 onwards are used as the index for identifying the SSBs (SSB index).

[0046] Figure 5 shows an example of some SSB allocations when the number of SSBs is expanded to a value greater than 64. Specifically, Figure 5 shows the state in which SSBs with SSB indexes #64 and above are added to the example SSB burst configuration shown in Figure 4. Note that if a larger SCS is applied, the symbol duration may differ, as shown in Table 1.

[0047] As shown in Fig. 5, the SSB index can have a value from 64 onwards. In the present embodiment, the following description will be given assuming that the SSB index ranges from 0 to 255. However, the SSB index value and range are not particularly limited to this example, and the number of SSBs may exceed 256, or may be greater than 64 but less than 256.

[0048] Fig. 6 shows an example of the configuration of a synchronization signal block (SSB). As shown in Fig. 6, the SSB is made up of a synchronization signal (SS) and a downlink physical broadcast channel (PBCH).

[0049] The SS is composed of a primary synchronization signal (PSS: Primary SS) and a secondary synchronization signal (SSS: Secondary SS).

[0050] The PSS is a known signal that the UE 200 first attempts to detect in the cell search procedure, and the SSS is a known signal that is transmitted to detect a physical cell ID in the cell search procedure.

[0051] The PBCH includes information necessary for UE200 to establish frame synchronization with the NR cell formed by gNB100 after detecting the SS / PBCH block, such as the radio frame number (SFN: System Frame Number) and an index for identifying the symbol positions of multiple SS / PBCH blocks within a half frame (5 milliseconds).

[0052] The PBCH can also include system parameters required for receiving system information (SIB). Furthermore, the SSB also includes a broadcast channel demodulation reference signal (DMRS for PBCH). The DMRS for PBCH is a known signal transmitted to measure the wireless channel conditions for PBCH demodulation.

[0053] FIG. 7 is an explanatory diagram of an example of SSB allocation on a radio frame and the relationship between the beam BM. As described above, the SSB, specifically, the synchronization signal (PSS / SSS) and PBCH shown in FIG. 6, are transmitted within either the first or second half frame (5 milliseconds) of each radio frame (FIG. 7 shows an example of transmission within the first half frame). The terminal also assumes that each SSB is associated with a different beam BM. In other words, the terminal assumes that each SSB is associated with a beam BM with a different transmission direction (coverage). As a result, a UE 200 residing within an NR cell can receive one of the beam BMs, acquire the SSB, and begin initial access and SSB detection and measurement.

[0054] The SSB transmission pattern may vary depending on the SCS, frequency range (FR), or other parameters. Furthermore, not all SSBs necessarily need to be transmitted. Depending on the network requirements, status, etc., only a small number of SSBs may be selectively transmitted, and UE 200 may be notified of which SSBs are to be transmitted and which are not.

[0055] The SSB transmission pattern is determined by the RRC Information IE (ssb-PositionsInBurst) mentioned above. The UE 200 is notified by the UE 200 .

[0056] Fig. 8 shows a setting example of CORESET, SSB, and PDSCH. Specifically, Fig. 8 shows a setting example of RMSI CORESET, SSB, and PDSCH (Physical Downlink Shared Channel) in the time direction (which may be called time domain) and frequency direction (which may be called frequency domain) when "1" to "3" ("Pattern" in the figure) are selected as the multiplexing pattern of SSB and CORESET (which may be called RMSI CORESET or CORESET#0).

[0057] Note that, in this embodiment, the description will be mainly based on the assumption that an SSB and a CORESET (RMSI CORESET or CORESET#0) are mapped, but the SSB may be interpreted as being substantially mapped to a Type 0 PDCCH MO. In other words, an SSB may be mapped to a CORESET, or may be mapped to a Type 0 PDCCH MO. Furthermore, the term "mapping" may be replaced with other synonymous terms, such as "associate" or "link."

[0058] As shown in Tables 13-1 to 13-10 described in 3GPP TS38.213 v15 / 13 chapter (i.e., 3GPP Release 15), UE 200 determines the number of consecutive resource blocks (RBs) and the number of consecutive symbols of RMSI CORESET from the four most significant bits (controlResourceSetZero) of pdcch-ConfigSIB1 included in the Master Information Block (MIB), and determines the period and timing of monitoring occasions (MOs) of PDCCH (including Type 0 PDCCH) from the four least significant bits (searchSpaceZero) of pdcch-ConfigSIB1 included in the MIB. Note that pdcch-ConfigSIB1 may also be referred to as RMSI-PDCCH-Config, etc.

[0059] More specifically, when UE 200 determines that a CORESET for the Type0-PDCCH CSS set exists, UE 200 determines several consecutive resource blocks (RBs) and symbols for the CORESET.

[0060] For example, pdcch-ConfigSIB1 is "0", and the four most significant bits (MSB) and four least significant bits (LSB) are "0". Also, assume that the subcarrier spacing (SCS) is 15 kHz. In this case, the following parameters can be obtained according to Table 1.

[0061] RB=24, Symbol=2, Offset=0, Multiplexing pattern=1

[0062] [Table 2]

[0063] Furthermore, according to Table 2, the following parameters can be obtained for SSB:

[0064] O=0, M=1, first symbol index=0, number of CSS sets per slot=1

[0065] [Table 3]

[0066] Tables 1 and 2 are reprints of Tables 13-1 and 13-11 in 3GPP TS38.213. Note that "O" indicates the offset amount from the transmission reference position of Type 0 PDCCH. Also, "M" indicates a parameter for determining the slot containing the corresponding Type 0-PDCCH MO according to the SSB index.

[0067] In this way, the multiplexing pattern of SSB and CORESET and the Type 0 PDCCH MO are determined.

[0068] In addition to Multiplexing pattern = 1, Fig. 8 also shows setting examples for Multiplexing pattern = 2 and 3. As shown in Fig. 8, the settings of CORESET, SSB, and PDSCH include the case of time division multiplexing (TDM) only (Multiplexing pattern = 1), the case of TDM and frequency division multiplexing (FDM) (Multiplexing pattern = 2), and the case of FDM only (Multiplexing pattern = 3).

[0069] 9 shows an example of the configuration of a Type 0 PDCCH MO. Specifically, FIG. 9 shows an example of the configuration of a Type 0 PDCCH MO according to the above-mentioned setting example. When the SCS is 15 kHz, the SSB index is 0, 1, 2, or 3, and as specified in Chapter 13 of 3GPP TS38.213, UE 200 determines the slot index n0 in the radio frame (SFN) as 0, 1, 2, or 3.

[0070] That is, the UE 200 monitors the PDCCH (Type 0 PDCCH) in two consecutive slots starting from n0=0, 1, 2, 3.

[0071] (2) Functional block configuration of wireless communication system Next, a description will be given of the functional block configuration of the wireless communication system 10. Specifically, a description will be given of the functional block configuration of the UE 200.

[0072] Fig. 10 is a functional block diagram of UE 200. As shown in Fig. 10, UE 200 includes radio signal transmitting / receiving unit 210, amplifier unit 220, modem unit 230, control signal / reference signal processing unit 240, encoding / decoding unit 250, data transmitting / receiving unit 260, and control unit 270.

[0073] The radio signal transmitting / receiving unit 210 transmits and receives radio signals conforming to NR. The radio signal transmitting / receiving unit 210 supports Massive MIMO, CA that uses a bundle of multiple CCs, and DC that simultaneously communicates between a UE and two NG-RAN nodes.

[0074] Furthermore, the radio signal transmitting / receiving unit 210 may transmit and receive radio signals using a slot with a larger number of symbols than when using FR1 or FR2. The number of symbols specifically refers to the number of OFDM symbols that make up the slot shown in FIG.

[0075] For example, the radio signal transmitting / receiving unit 210 can transmit and receive radio signals using slots with a 28 symbol / slot configuration.

[0076] In addition, in this embodiment, the radio signal transceiver unit 210 can receive a synchronization signal block, specifically an SSB (SS / PBCH Block), in one or more frequency ranges, specifically, in a different frequency band from the frequency bands including FR1 and FR2, i.e., FR3 and FR4.

[0077] Specifically, the radio signal transmitting / receiving unit 210 can receive at least one of a plurality of SSBs that are transmitted from the network using the same time position or the same frequency position and have different indices for identifying the SSBs.

[0078] Note that different indices for identifying SSBs may be interpreted as different Quasi-Colocation (QCL) assumptions. In other words, the radio signal transmitting / receiving unit 210 (UE 200) can receive at least one of multiple SSBs with different QCL assumptions.

[0079] QCL is, for example, when two antenna ports are considered quasi-co-located if the characteristics of the channel over which symbols on one antenna port are carried can be inferred from the channel over which symbols on the other antenna port are carried.

[0080] It can also be interpreted that SSBs with the same SSB index are assumed to be QCL, and that other SSBs (i.e., different SSB indexes) should not be assumed to be QCL. Note that QCL may also be called quasi-collocation.

[0081] In this embodiment, the maximum number of SSBs (L) is extended to 256, and as described below, the network (gNB100) can transmit multiple SSBs at the same time position (which may also be read as a time resource, time domain, etc.) or the same frequency position (which may also be read as a frequency resource, frequency band, frequency domain, etc.).

[0082] The radio signal transmitting / receiving unit 210 can receive at least one of the multiple SSBs (that is, multiple SSBs may be received) transmitted at the same time position or frequency position.

[0083] As will be described later, multiple SSBs transmitted from the network may constitute multiple synchronization signal block sets (SSB sets). Multiple synchronization signal block sets transmitted at the same time position are synchronized with each other in the time direction and may be transmitted at the same timing.

[0084] The wireless signal transceiver 210 can receive at least one of a plurality of synchronization signal block sets or a plurality of synchronization signal block sets.

[0085] In this embodiment, the radio signal transceiver 210 configures a first receiver that receives an SSB in a different frequency band such as FR4 (or FR3), and a second receiver that receives a system information block using a CORESET (control resource set) associated with the SSB.

[0086] The system information block is a type of broadcast information that is simultaneously broadcast from the gNB100 (radio base station) to the UE200. The system information block may be divided into a plurality of blocks, and the system information block may be any or all of the plurality of blocks. In this embodiment, the system information block includes SIB1. In order for the UE200 to perform random access, uplink carrier information, random access signal configuration information, etc. are required, and information required at the time of initial access, including these, is broadcast to terminals in the cell as SIB1.

[0087] The radio signal transmitting / receiving unit 210 (first receiving unit) can receive at least one of a plurality of SSBs that are transmitted from the network using the same time position or the same frequency position and have different QCL assumptions.

[0088] Furthermore, the radio signal transmitting / receiving unit 210 (second receiving unit) can use at least one of a plurality of CORESETs that are transmitted using the same time position or the same frequency position and have different QCL assumptions. That is, the radio signal transmitting / receiving unit 210 can receive a system information block using at least one of a plurality of CORESETs that are transmitted using the same time position or the same frequency position and have different QCL assumptions.

[0089] Alternatively, the radio signal transceiver unit 210 (second receiver unit) can use at least one of a plurality of CORESETs transmitted from the network by time division multiplexing (TDM) and with different QCL assumptions. That is, the radio signal transceiver unit 210 can receive a system information block using at least one of a plurality of CORESETs transmitted from the network by time division multiplexing (TDM) and with different QCL assumptions.

[0090] More specifically, the multiple CORESETs (RMSI CORESETs) are transmitted using the same time position (may be in the time domain) or frequency position (may be in the frequency domain). For example, RMSI CORESET #0 and RMSI CORESET #1 may be transmitted using the same time position or frequency position.

[0091] In this case, the radio signal transmitting / receiving unit 210 (second receiving unit) may receive a master information block (MIB) transmitted from the network before the system information block (SIB1). The MIB includes information on the SSBs transmitted from the network. Furthermore, in this case, one SSB may be associated with multiple CORESETs, or multiple SSBs may be associated with one control resource set.

[0092] In addition, when using a frequency band including FR1 and FR2, the radio signal transceiver unit 210 (first receiver) can receive a system information block (SIB1) using a CORESET associated with an SSB, as specified in Release 15.

[0093] The amplifier unit 220 is configured by a PA (Power Amplifier) / LNA (Low Noise Amplifier), etc. The amplifier unit 220 amplifies the signal output from the modulation / demodulation unit 230 to a predetermined power level. The amplifier unit 220 also amplifies the RF signal output from the radio signal transmission / reception unit 210.

[0094] The modem unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB100 or another gNB).

[0095] As described above, in this embodiment, CP-OFDM and DFT-S-OFDM can be applied. Furthermore, in this embodiment, DFT-S-OFDM can be used not only in the uplink (UL) but also in the downlink (DL).

[0096] The control signal / reference signal processor 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 .

[0097] Specifically, the control signal / reference signal processor 240 receives various control signals, for example, control signals of a radio resource control layer (RRC), transmitted via a predetermined control channel from the gNB 100. The control signal / reference signal processor 240 also transmits various control signals to the gNB 100 via a predetermined control channel.

[0098] Furthermore, the control signal / reference signal processor 240 performs processing using reference signals (RS) such as a demodulation reference signal (DMRS) and a phase tracking reference signal (PTRS).

[0099] DMRS is a reference signal (pilot signal) known between the base station and the terminal for estimating the fading channel used for data demodulation. PTRS is a terminal-specific reference signal for estimating phase noise, which is an issue in high frequency bands.

[0100] In addition to DMRS and PTRS, reference signals also include Channel State Information-Reference Signal (CSI-RS) and Sounding Reference Signal (SRS).

[0101] The channels include control channels and data channels, such as a PDCCH (Physical Downlink Control Channel), a PUCCH (Physical Uplink Control Channel), a RACH (Random Access Channel, Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI)), and a Physical Broadcast Channel (PBCH).

[0102] The data channel includes a physical downlink shared channel (PDSCH) and a physical downlink shared channel (PUSCH), etc. Data refers to data transmitted via a data channel.

[0103] The encoding / decoding unit 250 performs data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB100 or another gNB).

[0104] Specifically, the encoding / decoding unit 250 divides the data output from the data transmitting / receiving unit 260 into pieces of a predetermined size, performs channel coding on the divided data, decodes the data output from the modem unit 230, and concatenates the decoded data.

[0105] The data transmitter / receiver 260 transmits and receives Protocol Data Units (PDUs) and Service Data Units (SDUs). Specifically, the data transmitter / receiver 260 assembles and disassembles PDUs / SDUs in multiple layers (such as a Medium Access Control layer (MAC), a Radio Link Control layer (RLC), and a Packet Data Convergence Protocol layer (PDCP)). The data transmitter / receiver 260 also performs data error correction and retransmission control based on Hybrid Automatic Repeat Request (Hybrid ARQ).

[0106] The control unit 270 controls each functional block constituting the UE 200. In this embodiment, the control unit 270 executes control relating to a synchronization signal block (SSB), a control resource set (CORESET), and a system information block.

[0107] In particular, when the network is in non-standalone operation and uses different frequency bands such as FR3 and FR4, the control unit 270 may determine not to use the system information block (SIB1).

[0108] Non-standalone operation (Non-SA, NSA) refers to operation that is not solely NR FR3 or FR4, such as interworking between NR FR1 and / or FR2 and NR FR3 or FR4 (CA, DC), or interworking between LTE and NR FR3 or FR4, specifically E-UTRA-NR Dual Connectivity (EN-DC).

[0109] (3) Operation of the wireless communication system Next, we will explain the operation of the wireless communication system 10. Specifically, we will explain the transmission of a synchronization signal block (SSB) by the gNB 100 and the reception operation of the synchronization signal block by the UE 200. Furthermore, we will explain the operation of determining a control resource set (CORESET) by the UE 200.

[0110] (3.1) Example 1 In this example, the network (gNB 100) can simultaneously transmit multiple SSBs. Specifically, the network transmits a synchronization signal block set (SSB set) including multiple SSBs at the same position in the time or frequency direction.

[0111] Fig. 11 shows an example of the configuration of an SSB burst when 256 SSBs are transmitted sequentially rather than simultaneously. Fig. 12 shows an example of the configuration of an SSB burst when multiple SSBs are transmitted simultaneously according to Operation Example 1.

[0112] The configuration example shown in Figure 11 shows an image of transmitting 256 SSBs, that is, 256 beams BM by time division multiplexing (TDM) beam sweeping. In order to identify which SSB has been detected among the 256 SSBs, the SSB index is 8 bits (2 8 ) is required.

[0113] In the configuration example shown in Fig. 12, the maximum number of SSBs in an SSB set (M) is 64, and the number of SSB sets (N) is 4. Specifically, values ​​from 0 to 255 may be used for the SSB index, and values ​​from 0 to 3 may be used for the SSB set index.

[0114] In this way, the SSBs (maximum number: L) in an SSB burst can be classified into different SSB sets, which may be called by other names such as SSB groups.

[0115] As shown in Figure 12, multiple SSBs with different SSB indices within an SSB set may be transmitted at different positions in the time or frequency direction, and multiple SSBs included in different SSB sets may be transmitted at the same position in the time or frequency direction.

[0116] In the example shown in Figure 12, SSB set 0 includes SSBs with SSB indices of 0 to 63. Similarly, SSB set 1 includes SSBs with SSB indices of 64 to 127, SSB set 2 includes SSBs with SSB indices of 128 to 191, and SSB set 3 includes SSBs with SSB indices of 192 to 255. In other words, the values ​​of the SSB indexes included in each SSB set may differ for each SSB set.

[0117] For example, SSBs with SSB indexes = 0, 64, 128, and 192 can be transmitted at the same location. It is preferable that the beams BM associated with the SSBs having the SSB indexes have different transmission directions so as to cover all directions of the NR cell, as shown in Figure 12.

[0118] For example, each SSB set is an image of a corresponding antenna panel that forms a beam BM. By using multiple antenna panels to transmit different SSB sets, multiple SSBs can be transmitted simultaneously using different beam BMs. This example of operation is also applicable to analog beamforming, as specified in Release 15.

[0119] Fig. 13 is a diagram showing another example of the configuration of an SSB burst. As shown in Fig. 13, the indices of the SSBs included in each SSB set (the SSB indices of the SSBs transmitted simultaneously) are common between the SSB sets.

[0120] Specifically, compared to Operation Example 1, SSB index=0 to 63 are repeated in each SSB set.

[0121] On the other hand, two bits, specifically, 00, 01, 10, and 11, are used as a set index to identify an SSB set.

[0122] (3.2) Example 2 As in the above-described operation example 1, when the SSB index is extended up to 255 and multiple SSBs are transmitted at the same position in the time direction or frequency direction, the following points must be taken into consideration.

[0123] Specifically, FR2 in Release 15 specifies that the mapping from SSB to Type 0 PDCCH MO is one-to-one, and SSBs with different QCL assumptions are time-division multiplexed (TDM). Therefore, when multiple SSBs with different QCL assumptions are transmitted simultaneously, UE 200 needs to recognize how the RMSI CORESET is mapped.

[0124] Below, several operation examples will be described in which the UE 200 can correctly recognize the RMSI CORESET even in such a case.

[0125] (3.2.1) Example 2-1 In this operation example, RMSI CORESETs associated with SSBs transmitted at the same position in the time direction or frequency direction, i.e., SSBs transmitted simultaneously, have different QCLs but use the same time and frequency resources (T / F resources).

[0126] It is preferable that the content of pdcch-ConfigSIB1 (RMSI-PDCCH-Config) be the same between different SSB sets (PBCH).

[0127] Specifically, when the index for identifying the SSB (SSB index or Set index for identifying the SSB set, the same hereinafter) is 64 or more, that is, the T / F resources of controlResourceSetZero and searchSpaceZero may be the same at SSB x (x < M) and SSB y (y mod M = x, M: the maximum number of SSBs in the set). However, it is preferable that the QCL of the SSB is different. For example, in a plurality of RMSI CORESETs mapped to the same T / F resource, the RS assumed as the QCL source of the DMRS of the PDCCH may be associated with different SSB indexes. When the Set index is defined, the case where the index for identifying the SSB is 64 or more includes the case where the index of the SSB that can be identified by the combination of the Set index and the index of the SSB itself (SSB index) is 64 or more.

[0128] Also, when the maximum value of the index for identifying the SSB is 63, that is, when the maximum number of SSBs (M) is 64 and there is a Set index for identifying the SSB set, the T / F resources of controlResourceSetZero and searchSpaceZero may be the same at SSB x (x < M) among different SSB sets. However, it is preferable that the QCL of the SSB is different. For example, in a plurality of RMSI CORESETs mapped to the same T / F resource, the RS assumed as the QCL source of the DMRS of the PDCCH may be associated with the combination of the Set index and the SSB index.

[0129] Note that the content of the PBCH excluding the SSB index or Set index is preferably the same for all SSBs in the SSB burst set to the same center frequency. All RMSI CORESETs associated with the SSBs in the SSB burst preferably have the same settings (including the period) except for the QCL property and the property related to the position in the time domain.

[0130] In this operation example, UE 200 assumes that the DM-RS antenna ports associated with PDCCH reception in CORESET are arranged in approximately the same locations as the corresponding SSBs, i.e., quasi-co-location. This operation example can also be applied to any of the SSB and CORESET multiplexing patterns = 1, 2, and 3.

[0131] Figure 14 shows an example (part 1) of associating SSBs with CORESETs in operation example 2-1. Specifically, Figure 14 corresponds to the example of the SSB burst configuration shown in Figure 12. That is, Figure 14 shows an example of associating SSBs with CORESETs when the maximum number of SSBs in an SSB set (M) is 64 and the number of SSB sets (N) is 4. In Figure 14, SSB indices of 0 to 255 are used, and the additional X bits of the MSB are also used to indicate the SSB index.

[0132] As shown in Fig. 14, the CORESETs (RMSI CORESET, CORESET#0) associated with simultaneously transmitted SSBs are assigned the same T / F resource, but the QCL and Transmission Configuration Indication (TCI) are different between the multiple RMSI CORESETs.

[0133] Figure 15 shows an example (part 2) of associating SSBs with CORESETs in operation example 2-1. Specifically, Figure 15 corresponds to the example of the SSB burst configuration shown in Figure 13. That is, Figure 15 shows an example of associating SSBs with CORESETs when SSB index = 0 to 63 is repeated in each SSB set and two bits, specifically 00, 01, 10, and 11, are used as the Set index for identifying the SSB set.

[0134] As shown in Fig. 15, the CORESETs (RMSI CORESET, CORESET#0) associated with simultaneously transmitted SSBs are assigned the same T / F resource (similar to Fig. 14). Note that i = 0 to 63 (i mod M) can be used to calculate the index (n0) of the slot in the radio frame (SFN).

[0135] Specifically, when Multiplexing pattern=1 (see Table 2 and FIG. 8), UE 200 monitors the PDCCH in the TType 0 PDCCH CSS configured over two consecutive slots starting from slot n0, where "i" indicates the index of the SSB (SS / PBCH block).

[0136] (3.2.2) Example 2-2 In this example operation, the RMSI CORESETs associated with simultaneously transmitted SSBs have different QCLs and are transmitted from the network by time division multiplexing (TDM).

[0137] In this operation example, similarly to operation example 2-1, it is preferable that the contents of pdcch-ConfigSIB1 (RMSI-PDCCH-Config) are the same between different SSB sets (PBCH). Also, it is assumed that UE 200 has DM-RS antenna ports related to PDCCH reception in CORESET arranged in approximately the same locations as the corresponding SSBs, that is, quasi-co-location. Also, this operation example can be applied only when Multiplexing pattern = 1 between SSB and CORESET.

[0138] Figure 16 shows an example of the association between SSBs and CORESETs in operation example 2-2. Specifically, Figure 16 corresponds to the example configuration of the SSB burst shown in Figure 13. That is, Figure 16 shows an example of the association between SSBs and CORESETs when SSB index = 0 to 63 is repeated in each SSB set and two bits, specifically 00, 01, 10, and 11, are used as the Set index for identifying the SSB set.

[0139] In the example shown in FIG. 16, a CORESET associated with SSBs (SSB index=0 to 63) included in Set index=00 is allocated first, and then CORESETs associated with Set index=01, 10, and 11 are allocated.

[0140] In this operation example, the index (n0) of the slot in the radio frame (SFN) can be calculated using i=0 to 255 (i mod M+Set index*M).

[0141] (3.2.2.1) Example of operation 2-2-1 In the case of the above-described operational example 2-2, since the MIB does not include information on the index (SSB index, Set index) of the SSB that was actually transmitted, the Type 0 PDCCH MO (which may also be called the RMSI PDCCH MO) is defined and assumed for all indexes. For example, even if only SSB indexes = 0 and 4 are used, the SSB index is defined for 0, 1, 2, 3, 4, etc. Therefore, the slots including the Type 0 PDCCH MO corresponding to the SSBs with SSB index = 0 and 4 are separated.

[0142] Furthermore, in the case of Multiplexing pattern 1 of Release 15, Type 0 PDCCH MOs are arranged in consecutive slots without gaps (see FIG. 9). However, adjacent SSBs in the time direction are arranged with gaps (see FIG. 4, etc.). Therefore, mapping Type 0 PDCCH MOs may cause long-term scheduling (beam) restrictions.

[0143] In this operation example, in order to solve this problem, when a high frequency band such as FR4 is used, the MIB can include information about the SSBs that are actually transmitted (for example, a group bitmap). Based on this information about the SSBs that are actually transmitted, the UE 200 generates a Type 0 Define and assume PDCCH MO.

[0144] For example, Type 0 PDCCH MOs for SSBs (groups) not indicated by the MIB may not be defined, ie, may be skipped.

[0145] As a result, when a high frequency band such as FR4 is used, even in Multiplexing pattern 1, slots including Type 0 PDCCH MO can be arranged by aggregating only those corresponding to the SSBs that are actually transmitted.

[0146] Furthermore, when using a high frequency band such as FR4, even in Multiplexing pattern 1, slots including Type 0 PDCCH MOs are not necessarily arranged in consecutive slots in order according to the SSB index, but may be defined so that slots not including Type 0 PDCCH MOs are inserted in between and Type 0 PDCCH MOs are included in non-consecutive slots. This allows slots not including Type 0 PDCCH MOs to be used with any beam, thereby easing scheduling (beam) restrictions.

[0147] (3.2.2.2) Example 2-2-2 As described above, when a high frequency band such as FR4 is used, the beams used to transmit the SSB and PDCCH are quite narrow. Therefore, even if the UE 200 detects an SSB, it may not be able to detect the corresponding PDCCH if the UE 200 moves or rotates even slightly.

[0148] In this operation example, in order to solve this problem, the association between the SSB and the Type 0 PDCCH MO can be one to many (1:N). The factor N relating to this association can be indicated by the MIB.

[0149] Figure 17 shows an example of the association between SSBs and CORESETs in operation example 2-2-2. Specifically, Figure 17 corresponds to the example configuration of the SSB burst shown in Figure 13. That is, Figure 17 shows an example of the association between SSBs and CORESETs when SSB index = 0 to 63 is repeated in each SSB set and two bits, specifically 00, 01, 10, and 11, are used as the Set index for identifying the SSB set.

[0150] In the example shown in FIG. 17, multiple RMSI CORESETs, that is, multiple Type 0 PDCCH MOs, are associated with one SSB.

[0151] More specifically, the following options may be applied:

[0152] (Option 1): Grouped into N SSB indexes. For example, a terminal that detects SSB index #A (A is a tentative identifier, same below) will receive the SSBs that make up the group containing SSB index #A. The Type 0 PDCCH MO associated with the index is monitored.

[0153] For example, if N=8 and the terminal detects SSB index=10, the terminal monitors Type 0 PDCCH MOs associated with SSB index=8 to 15.

[0154] (Option 2): A terminal that detects SSB index #A monitors Type 0 PDCCHMOs associated with SSB indices in the range from (SSB index #AN / 2) to (SSB index #A+N / 2-1).

[0155] For example, if N=8 and the terminal detects SSB index=10, the terminal monitors Type 0 PDCCH MOs associated with SSB index=6 to 13 (SSB index #10-8 / 2=6, SSB index #10+8 / 2-1=13).

[0156] (3.2.2.3) Example 2-2-3 In the case of the above-described operational example 2-2, since a large number of CORESETs are time-division multiplexed, mapping of Type 0 PDCCH MO may cause restrictions on the schedule (beam) over a long period of time.

[0157] In this operation example, to solve this problem, the association between SSB and Type 0 PDCCH MO can be many-to-one (N:1). This operation is the opposite pattern to the operation example 2-2-2 (1:N). The factor N related to this association can be indicated by the MIB.

[0158] Figure 18 shows an example of the association between SSBs and CORESETs in operation example 2-2-3. Specifically, Figure 18 corresponds to the example configuration of the SSB burst shown in Figure 13. That is, Figure 18 shows an example of the association between SSBs and CORESETs when SSB index = 0 to 63 is repeated in each SSB set and two bits, specifically 00, 01, 10, and 11, are used as the Set index for identifying the SSB set.

[0159] In the example shown in FIG. 18, one RMSI CORESET, that is, one Type 0 PDCCH MO, is associated with multiple SSBs.

[0160] Specifically, a Type 0 PDCCH MO is defined and assumed only for each of N SSB indices (e.g., 0, N, 2N, ...). For example, a terminal detecting SSB index #A monitors the Type 0 PDCCH MO associated with SSB index i*N (where i=floor(A / N)).

[0161] For example, if N=8 and the terminal detects SSB index=10, the terminal monitors the Type 0 PDCCH MO associated with SSB index=8 (floor (10 / 8)=2).

[0162] Furthermore, beam cycling may be applied to the transmission of Type 0 PDCCH in different periods. For example, as shown in Fig. 18, the association between the SSB and the RMSI CORESET described above may be repeated for each beam (#0 to (N-1)).

[0163] The above-described operational examples 2-2-1 to 2-2-3 can be applied not only to the case where multiple SSBs are transmitted simultaneously, but also to the case where multiple SSBs are transmitted by TDM.

[0164] (3.2.3) Example 2-3 When using different frequency bands such as FR3 and FR4, the system information block (SIB) SIB1 may be unnecessary, assuming that the network is in non-standalone operation. In other words, SIB1 may be used only when the wireless communication system 10 is in standalone operation of NR FR3 or FR4.

[0165] In the case of non-standalone operation, the bits used to configure the Type 0 PDCCH (which may also be called an RMSI PDCCH), specifically, the 8 bits of pdcch-ConfigSIB1, may be used for other purposes.

[0166] For example, the bit may be used as part of the SSB index or for the Set index, or may not be used at all in order to reduce the size of the MIB.

[0167] (4) Actions and Effects According to the above-described embodiment, the following advantageous effects can be obtained. Specifically, the UE 200 can use at least one of a plurality of RMSI CORESETs that are transmitted using the same time position or the same frequency position and have different QCL assumptions. Therefore, even when a plurality of SSBs with different QCL assumptions are transmitted simultaneously, the UE 200 can correctly recognize the RMSI CORESET mapped to the SSBs.

[0168] Furthermore, the UE 200 can use at least one of multiple RMSI CORESETs transmitted from the network by time division multiplexing (TDM) and with different QCL assumptions. Therefore, even when multiple SSBs with different QCL assumptions are transmitted by TDM, the UE 200 can correctly identify the RMSI CORESETs mapped to the SSBs.

[0169] In this case, the MIB may include information about SSBs transmitted from the network. This allows the UE 200 to flexibly set information about RMSI CORESETs corresponding to SSBs transmitted from the network by TDM. Furthermore, slots including Type 0 PDCCH MOs may be assumed to be non-contiguous. This can alleviate restrictions on long-term scheduling (beaming) due to the fact that Type 0 PDCCH MOs are arranged in consecutive slots without gaps, as in Multiplexing pattern 1 of Release 15.

[0170] Furthermore, one SSB may be associated with multiple RMSI CORESETs (1:N), or multiple SSBs may be associated with one RMSI CORESET (N:1).

[0171] When SSB:RMSI CORESET=1:N is applied, even if UE 200 detects an SSB, the possibility of not being able to detect the corresponding PDCCH can be reduced if UE 200 moves or rotates even slightly. Also, when SSB:RMSI CORESET=N:1 is applied, the restriction on long-term schedules (beams) due to mapping of Type 0 PDCCH MO can be relaxed.

[0172] Furthermore, when the network is in non-standalone operation (NSA) and uses different frequency bands such as FR3 and FR4, the UE 200 can determine not to use the system information block, specifically, SIB1.

[0173] Therefore, even if multiple SSBs with different QCL assumptions are transmitted, in the case of non-standalone operation (NSA), the control information can be correctly recognized via other nodes (such as NR FR1 / FR2 or LTE).

[0174] (5) Other embodiments The present invention has been described above with reference to the examples, but it will be obvious to those skilled in the art that the present invention is not limited to these examples and that various modifications and improvements are possible.

[0175] For example, in the above-described embodiment, a high frequency band such as FR4, i.e., a frequency band above 52.6 GHz, is used as an example, but at least one of the above-described operational examples may be applied to other frequency ranges, such as FR3.

[0176] Furthermore, as described above, FR4 may be divided into a frequency range of 70 GHz or less and a frequency range of 70 GHz or more, and the correspondence between the proposals and the frequency ranges may be changed as appropriate, such as (Proposal 1) to (Proposal 3) being applied to the frequency range of 70 GHz or more and these proposals being partially applied to the frequency range of 70 GHz or less.

[0177] Furthermore, the block diagram (FIG. 10) used in the description of the above-described embodiment shows functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of 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 also be realized by combining the single device or multiple devices with software.

[0178] 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, allocating, 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 each is implemented.

[0179] Furthermore, the above-described UE 200 may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 19 is a diagram showing an example of the hardware configuration of the UE 200. As shown in Fig. 19, the UE 200 may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0180] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the apparatus 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.

[0181] Each functional block of the UE 200 (see FIG. 10) is realized by any hardware element of the computer device, or a combination of the hardware elements.

[0182] In addition, each function in UE200 is realized by loading specified software (programs) onto hardware such as processor 1001, memory 1002, etc., so that processor 1001 performs calculations, controls communication by communication device 1004, and controls at least one of reading and writing data in memory 1002 and storage 1003.

[0183] The processor 1001 controls the entire computer by running, for example, an operating system, and may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control unit, an arithmetic unit, a register, and the like.

[0184] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-mentioned embodiments. Furthermore, the various processes described above may be executed by one processor 1001, or may 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.

[0185] The memory 1002 is a computer-readable recording medium and may be configured by, for example, 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 memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store a program (program code), a software module, etc., that can execute a method according to an embodiment of the present disclosure.

[0186] Storage 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a Compact Disc ROM (CD-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. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0187] 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 called, for example, a network device, a network controller, a network card, or a communication module.

[0188] The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize, for example, at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

[0189] 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).

[0190] Furthermore, each device such as the processor 1001 and the memory 1002 is connected to 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.

[0191] 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 realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0192] 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., 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.

[0193] Each aspect / embodiment described in the present disclosure may be applied to at least one of a system using Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, a 4th generation mobile communication system (4G), a 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, 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), or other suitable system, and a next-generation system extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A and 5G) may also be applied.

[0194] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure 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.

[0195] In the present disclosure, a specific operation described as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (for example, an MME or an S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (for example, an MME and an S-GW) may also be used.

[0196] Information, signals (information, etc.) 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.

[0197] The input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. The input and output information may be overwritten, updated, or added to. The output information may be deleted. The input information may be sent to another device.

[0198] 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).

[0199] 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).

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0205] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0206] 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.

[0207] In this disclosure, terms such as "base station (BS)," "radio 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" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0208] A base station can accommodate one or more (e.g., three) cells (also called sectors). 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 services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).

[0209] The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage area.

[0210] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0211] 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.

[0212] 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 object, or the mobile object itself. The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0213] Furthermore, a base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter). For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a mobile station is replaced with communication between multiple mobile stations (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the mobile station may be configured to have the functions of a base station. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as uplink channel and downlink channel may be read as side channel.

[0214] Similarly, a mobile station in the present disclosure may be interpreted as a base station, in which case the base station may have the functions of a mobile station.

[0215] A radio frame may consist of one or more frames in the time domain.

[0216] In the time domain, each of one or more frames may be referred to as a subframe.

[0217] A subframe may further be composed of one or more slots in the time domain, and may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0218] Numerology may be a communication parameter applied 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 a transceiver in the frequency domain, and specific windowing operations performed by a transceiver in the time domain.

[0219] A slot may consist of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) A slot may be a numerology-based time unit.

[0220] A slot may include multiple minislots. Each minislot may consist of one or more 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.

[0221] 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.

[0222] 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 (e.g., 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.

[0223] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0224] 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.

[0225] 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.

[0226] 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.

[0227] 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.

[0228] 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.

[0229] The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may also be determined based on the numerology.

[0230] The time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length. Each TTI, subframe, etc. may be composed of one or more resource blocks.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] 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."

[0236] The above-described structures of the radio frame, subframe, slot, minislot, and symbol 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, and other configurations can be changed in various ways.

[0237] 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.

[0238] The reference signal may also be abbreviated as Reference Signal (RS), and may also be called a pilot depending on the applicable standard.

[0239] 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."

[0240] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0241] 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 therein or that the first element must precede the second element in some way.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that 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."

[0246] 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. [Explanation of symbols]

[0247] 10. Wireless communication systems 20 NG-RAN 100 gNB 200 UE 210 Radio signal transmitter / receiver 220 Amplifier section 230 Modulation and Demodulation Unit 240 Control signal / reference signal processing section 250 Encoding / Decoding Unit 260 Data transmission and reception unit 270 Control Unit 1001 processor 1002 memory 1003 Storage 1004 Communication equipment 1005 Input Device 1006 Output Device 1007 Bus

Claims

1. A first receiving unit that receives a synchronization signal block in a frequency band different from a frequency band including the frequency range of FR1 or FR2; a second receiving unit for receiving a system information block using a control resource set associated with the synchronization signal block; Equipped with The first receiving unit receives at least one of a plurality of synchronization signal blocks having different quasi-co-location assumptions from a network; The second receiving unit uses at least one of the control resource sets transmitted from the network by time division multiplexing and having different quasi-co-location assumptions, The second receiving unit includes information on the synchronization signal block transmitted from the network, which is used to estimate monitoring opportunities for the physical downlink control channel. A terminal that receives a master information block transmitted from the network prior to the system information block.

2. The terminal according to claim 1 , wherein one synchronization signal block is associated with a plurality of the control resource sets, or a plurality of the synchronization signal blocks are associated with one of the control resource sets.

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