terminal

Abstract

The terminal receives a master information block and a synchronization signal block from a wireless base station, obtains an offset between the synchronization signal block and a control resource set using a parameter for quasi co-location derivation included in the master information block, and assumes quasi co-location associated with the synchronization signal block based on the obtained offset.

Description

Technical Field

[0001] The present invention relates to a terminal for performing wireless communication, and more particularly to a terminal for using an unlicensed frequency band. Background Art

[0002] In the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE) was standardized, LTE-Advanced (hereinafter referred to as LTE including LTE-Advanced) was standardized for the purpose of further speeding up LTE, and the standardization of the fifth generation mobile communication system (5th generation mobile communication system) (also called 5G, New Radio (NR) or Next Generation (NG)) was also promoted.

[0003] For example, in NR, similar to LTE, studies are also being conducted on New Radio-Unlicensed (NR-U) which uses spectrum in an unlicensed (licensed-exempt) band to expand the available frequency band (Non-Patent Document 1).

[0004] In addition, regarding the initial access in NR-U, a method of notifying the terminal (User Equipment, UE) of the parameter Q used to derive the quasi co-location (QCL) of the SSB (SS / PBCH Block) composed of the synchronization signal (SS: Synchronization Signal) and the downlink physical broadcast channel (PBCH: Physical BroadcastCHannel) was studied (non-patent document 2).

[0005] Among them, the negotiation reached an agreement on "using the Master Information Block (MIB) or the System Information Block (SIB) (specifically, the Remaining Minimum System Information (RMSI) of SIB1) to notify Q".

[0006] Prior art literature

[0007] Non-patent literature

[0008] Non-patent document 1: 3GPP TR 38.889 V16.0.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on NR-based access to unlicensed spectrum (Release 16), 3GPP, December 2018

[0009] Non-patent document 2: "Feature lead summary 3 of Enhancements to initial access procedure", R1-1911685, 3GPP TSG RAN WG1 Meeting #96, 3GPP, October 2019 Summary of the invention

[0010] In the case of considering achieving good initial access in NR-U, it may be considered to preferably use MIB to notify the parameter for deriving the QCL of the SSB, namely Q. Thus, the terminal quickly obtains Q, and in the initial access, decodes the MIB to derive the QCL, so that the position of the SSB to be monitored can be determined from the candidate transmission positions of multiple SSBs.

[0011] However, the size of the MIB is limited, and it is difficult to ensure the amount of information (number of bits) required for notifying Q in the same field.

[0012] The present invention has been made in view of the above situation, and an object of the present invention is to provide a terminal that can quickly acquire parameters for deriving a quasi co-location (QCL) of an SSB (SS / PBCH Block).

[0013] One embodiment of the present disclosure provides a terminal (UE 200), which includes: a receiving unit (control signal / reference signal processing unit 240), which receives a master information block and a synchronization signal block from a wireless base station (gNB 100); and a control unit (control unit 270), which uses the parameters for quasi-co-location derivation included in the master information block to obtain an offset between the synchronization signal block and a control resource set, and assumes a quasi-co-location associated with the synchronization signal block based on the obtained offset.

[0014] One embodiment of the present disclosure provides a terminal (UE 200), which includes: a receiving unit (control signal / reference signal processing unit 240), which receives a main information block and a synchronization signal block from a wireless base station (gNB 100); and a control unit (control unit 270), which assumes a quasi-co-location associated with the synchronization signal block based on parameters for quasi-co-location derivation contained in the main information block and an offset between the synchronization signal block and a control resource set contained in the main information block.

[0015] One embodiment of the present disclosure provides a terminal (UE 200), which has: a receiving unit (control signal / reference signal processing unit 240), which receives a main information block and a synchronization signal block from a wireless base station (gNB 100); and a control unit (control unit 270), which uses parameters for quasi-co-location derivation included across multiple fields constituting the main information block to assume a quasi-co-location associated with the synchronization signal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a diagram schematically showing the overall structure of the wireless communication system 10 .

[0017] Figure 2 is a diagram showing a frequency range used in the wireless communication system 10 .

[0018] Figure 3 1 is a diagram showing a configuration example of a radio frame, a subframe, and a time slot used in the wireless communication system 10 .

[0019] Figure 4 This is a functional block diagram of UE200.

[0020] Figure 5 It is a diagram showing a structural example of MIB.

[0021] Figure 6 This is a diagram showing a structural example of PDCCH-ConfigSIB1 included in the MIB.

[0022] Figure 7 This is a diagram showing an example of the configuration of CORESET#0 and SSB in the frequency direction for NR-U.

[0023] Figure 8 This is a diagram showing an example of the configuration (PRB position) of CORESET#0 and SSB in the frequency direction for NR-U according to the provisions of 3GPP Release-15.

[0024] Fig. 9This is an explanatory diagram of a change in the method of deriving the offset value between SSB and CORESET#0 in an example of the arrangement of CORESET#0 and SSB in the frequency direction (position of PRB).

[0025] Fig.10 This is a diagram showing an example of the hardware configuration of UE 200 . DETAILED DESCRIPTION

[0026] Hereinafter, the embodiments will be described based on the drawings. In addition, the same or similar reference numerals are given to the same functions and structures, and the description thereof will be appropriately omitted.

[0027] (1) Overall schematic structure of wireless communication system

[0028] Figure 1 This is a schematic diagram of the overall structure of the wireless communication system 10 involved in this embodiment. The wireless communication system 10 is a wireless communication system based on the 5G New Radio (New Radio: NR), including a next-generation radio access network 20 (Next Generation-Radio Access Network 20, hereinafter referred to as NG-RAN 20), and a terminal 200 (hereinafter referred to as UE200).

[0029] NG-RAN 20 includes a radio base station 100 (hereinafter referred to as gNB 100). In addition, the specific structure of the wireless communication system 10 including the number of gNBs and UEs is not limited to Figure 1 Example shown.

[0030] NG-RAN 20 actually includes multiple NG-RAN Nodes, specifically, multiple gNBs (or ng-eNBs), which are connected to a 5G-based core network (5GC, not shown). In addition, NG-RAN 20 and 5GC can be simply referred to as "network".

[0031] gNB100 is a 5G-based wireless base station that performs 5G-based wireless communications with UE200. gNB100 and UE200 can support Massive MIMO (Multiple-Input Multiple-Output) that generates beams with higher directivity by controlling wireless signals sent from multiple antenna elements, carrier aggregation (CA) that bundles and uses multiple component carriers (CCs), and dual connectivity (DC) that simultaneously communicates between the UE and two NG-RAN nodes.

[0032] The wireless communication system 10 supports multiple frequency ranges (FR). Figure 21 shows the frequency range used in the wireless communication system 10. In addition, Figure 3 A configuration example of a radio frame, a subframe, and a time slot used in the wireless communication system 10 is shown.

[0033] like Figure 2 As shown, the wireless communication system 10 supports FR1 and FR2. The frequency band of each FR is as follows.

[0034] FR1: 410MHz~7.125GHz

[0035] FR2: 24.25 GHz to 52.6 GHz

[0036] In FR1, a sub-carrier spacing (SCS) of 15, 30 or 60 kHz is used, and a bandwidth (BW) of 5 to 100 MHz is used. FR2 has a higher frequency than FR1, uses an SCS of 60 or 120 kHz (including 240 kHz), and uses a bandwidth (BW) of 50 to 400 MHz.

[0037] In addition, SCS can be interpreted as a numerology. The numerology is defined in 3GPP TS 38.300 and corresponds to a subcarrier spacing in the frequency domain.

[0038] In addition, the wireless communication system 10 may also support a higher frequency band than the frequency band of FR2. For example, the wireless communication system 10 may support a frequency band exceeding 52.6 GHz and up to 114.25 GHz. Here, for the sake of convenience, this high frequency band is referred to as "FR4". FR4 belongs to the so-called EHF (extremely high frequency: extremely high frequency, also known as millimeter wave). In addition, FR4 is a temporary name and may also be called by other names.

[0039] In addition, FR4 can be further divided. For example, FR4 can be divided into a frequency range below 70 GHz and a frequency range above 70 GHz. Alternatively, FR4 can be divided into more frequency ranges and can also be divided in frequencies other than 70 GHz.

[0040] In addition, for convenience of explanation, the frequency band between FR1 and FR2 is referred to as “FR3.” FR3 is a frequency band exceeding 7.125 GHz and less than 24.25 GHz.

[0041] In the present embodiment, FR3 and FR4 are different from the frequency band including FR1 and FR2, and are referred to as different frequency bands.

[0042] In addition, in the wireless communication system 10, in addition to the frequency band allocated to the wireless communication system 10, an unlicensed frequency band Fu different from the frequency band is also used. Specifically, in the wireless communication system 10, a New Radio-Unlicensed (NR-U) that uses the spectrum of the unlicensed (licensed-free) frequency band to expand the available frequency band can be performed.

[0043] The frequency band allocated to the wireless communication system 10 is included in the frequency ranges of FR1 and FR2, etc., and is allocated based on government permission.

[0044] The unlicensed band Fu is a band that can be used without being limited to a specific communication carrier and does not require allocation permission from the government. For example, a band used for wireless LAN (WLAN) (2.4 GHz or 5 GHz band, etc.) is cited.

[0045] In the unlicensed band Fu, wireless stations can be installed without being limited to a specific communication carrier. However, signals from nearby wireless stations interfere with each other, significantly degrading communication performance, which is not preferable.

[0046] Therefore, for example, in Japan, as a requirement for wireless systems using unlicensed bands Fu (e.g., 5 GHz band), a Listen-Before-Talk (LBT) mechanism is applied, which states that "gNB 100 performs carrier sensing before starting transmission, and transmission is allowed within a predetermined time only when it can be confirmed that the channel is not used by other nearby systems." In addition, carrier sensing is a technology that confirms whether the frequency carrier is used by other communications before transmitting radio waves.

[0047] The LBT sub-band in NR-U can be set in the unlicensed band Fu, and can be expressed as a band for confirming the use of the unlicensed band Fu. The LBT sub-band can be, for example, 20MHz, half of 10MHz, or 1 / 4 of 5MHz.

[0048] gNB100 performs carrier sensing and, when it can confirm that the channel is not used by other nearby systems, sends a reference signal for radio link monitoring (specifically, RLM-RS (Radio link monitoring-Reference Signal)) toward the formed cell.

[0049] RLM-RS may include DRS (Discovery Reference Signal), SSB (SS / PBCH blocks: Synchronization Signal / Physical Broadcast Channel blocks) and CSI-RS (Channel State Information-RS). In addition, DRS may include CSI-RS associated with SSB, RMSI-CORSET (Remaining minimum system information-control resource sets), or PDSCH (Physical Downlink Shared Channel).

[0050] RMSI-CORSET is a CORESET (control resource sets, also called Remaining Minimum System Information: RMSI) CORESET) used for Type0-PDCCH CSS (Common Search Space) set. UE200 determines several consecutive resource blocks (RBs) and codewords used for RMSI-CORSET, and sets PDCCH (Physical Downlink Control Channel) according to the determined RBs and codewords. Specifically, it sets the monitoring opportunity (MO) of Type 0 PDCCH for decoding the system information block (SIB).

[0051] In addition, as shown in Tables 13-1 to 13-10 recorded in Chapter 3GPP TS38.213 v15 / 13, UE200 determines the number of continuous resource blocks (RBs) and the number of continuous symbols of RMSI CORESET from the 4 most significant bits (controlResourceSetZero) of pdcch-ConfigSIB1 included in the master information block (MIB), and determines the period and timing of the monitoring opportunity (MO) of PDCCH (including Type 0 PDCCH) from the 4 least significant bits (searchSpaceZero) of pdcch-ConfigSIB1 included in the MIB. In addition, pdcch-ConfigSIB1 can be called RMSI-PDCCH-Config, etc.

[0052] In addition, in the initial access in NR-U, the synchronization signal block (SSB) is also used, similar to 3GPP Release-15.

[0053] The SSB is composed of a synchronization signal (SS: Synchronization Signal) and a downlink physical broadcast channel (PBCH: Physical Broadcast CHannel).

[0054] SS is composed of a primary synchronization signal (PSS: Primary SS) and a secondary synchronization signal (SSS: Secondary SS).

[0055] The PSS is a known signal that the UE 200 initially attempts to detect during the cell search process. The SSS is a known signal that is sent during the cell search process in order to detect a physical cell ID.

[0056] PBCH includes the wireless frame number (SFN: System Frame Number), an index for identifying the symbol positions of multiple SS / PBCH Blocks within a half frame (5 milliseconds), and other information required for UE200 to establish frame synchronization with the NR cell formed by gNB100 after detecting the SS / PBCH Block.

[0057] In addition, PBCH may also include system parameters required for receiving system information (SIB). In addition, SSB also includes a demodulation reference signal for a broadcast channel (DMRS for PBCH). DMRS for PBCH is a known signal sent to measure the state of a wireless channel for PBCH demodulation.

[0058] The terminal assumes that each SSB is associated with a different beam BM. That is, the terminal assumes (quasi-co-location assumption) that each SSB is associated with a beam BM with a different transmission direction (coverage). As a result, the UE200 residing in the NR cell can receive any beam BM, obtain the SSB, and start initial access and SSB detection and measurement.

[0059] In addition, there are various transmission modes for SSB depending on SCS, frequency range (FR) or other parameters.

[0060] In the case of NR-U, the following points are different from Release 15. Specifically, the candidate position for SSB transmission is 1 frame (10 milliseconds). Therefore, the candidate position for SSB transmission is #10 (for SCS = 15 kHz, refer to Figure 2 The upper part), #20 (case of SCS=30kHz).

[0061] In addition, the number of SSBs actually to be transmitted is the number of SSBs required continuously after LBT succeeds. Therefore, the actual SSB transmission timing may be different each time in the SSB transmission candidate position according to the success or failure of LBT. Therefore, if the terminal accurately identifies the QCL, there is no need to perform SSB measurement in all SSB candidate positions, and the terminal only needs to perform measurement at the position with the same QCL.

[0062] In addition, in the case of NR-U, as described later, the correlation between SSB and quasi co-location (QCL) is determined by a predetermined derivation method.

[0063] In addition, for example, QCL means that two antenna ports are virtually located at the same position, while the characteristics of the channel through which symbols are transmitted on one antenna port can be estimated from the channel through which symbols are transmitted on another antenna port. QCL may also be referred to as quasi co-location.

[0064] (2) Functional block structure of wireless communication system

[0065] Next, a functional block configuration of the wireless communication system 10 will be described. Specifically, a functional block configuration of the UE 200 will be described.

[0066] Figure 4 is a functional block diagram of UE 200. Figure 4 As shown, UE 200 includes a radio signal transceiver 210 , an amplifier 220 , a modulation and demodulation unit 230 , a control signal and reference signal processing unit 240 , an encoding and decoding unit 250 , a data transceiver 260 , and a control unit 270 .

[0067] The wireless signal transceiver 210 transmits and receives wireless signals based on NR. The wireless signal transceiver 210 supports Massive MIMO, CA that bundles and uses multiple CCs, and DC that simultaneously communicates between the UE and two NG-RAN Nodes.

[0068] The amplifier unit 220 is composed of a PA (Power Amplifier) / LNA (Low Noise Amplifier) ​​etc. The amplifier unit 220 amplifies the signal output from the modulation and demodulation unit 230 to a predetermined power level. In addition, the amplifier unit 220 amplifies the RF signal output from the wireless signal transmission and reception unit 210 .

[0069] The modem unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. according to each predetermined communication destination (gNB100 or other gNB).

[0070] The control signal / reference signal processing unit 240 performs processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200 .

[0071] Specifically, the control signal / reference signal processing unit 240 receives various control signals sent from the gNB 100 via a predetermined control channel, for example, a control signal of the radio resource control layer (RRC). In addition, the control signal / reference signal processing unit 240 sends various control signals to the gNB 100 via a predetermined control channel.

[0072] The control signal / reference signal processing unit 240 performs processing using reference signals (RS) such as a demodulation reference signal (DMRS) and a phase tracking reference signal (PTRS).

[0073] DMRS is a terminal-specific reference signal (pilot signal) known between the base station and the terminal for estimating a fading channel used for data demodulation. PTRS is a terminal-specific reference signal for estimating phase noise, which is a problem in high frequency bands.

[0074] In addition to DMRS and PTRS, reference signals also include a channel state information-reference signal (CSI-RS) and a sounding reference signal (SRS). In addition, as described above, reference signals also include RLM-RS.

[0075] In addition, channels include control channels and data channels. Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), PRACH (Physical Random Access Channel), and PBCH (Physical Broadcast Channel).

[0076] In addition, the data channel includes PDSCH (Physical Downlink Shared Channel), PUSCH (Physical Uplink Shared Channel), etc. Data refers to data transmitted via the data channel.

[0077] The control signal / reference signal processing unit 240 receives the master information block and the synchronization signal block from the gNB 100. In the present embodiment, the control signal / reference signal processing unit 240 constitutes a receiving unit.

[0078] Specifically, the control signal and reference signal processing unit 240 can receive a master information block (Master Information Block: MIB). In addition to the MIB, the control signal and reference signal processing unit 240 can also receive a system information block (specifically, System Information Block, SIB). In addition, the MIB and the SIB can be collectively referred to as a system information block (or simply system information).

[0079] The encoding / decoding unit 250 performs data segmentation / concatenation and channel coding / decoding, etc. according to each predetermined communication destination (gNB100 or other gNB).

[0080] Specifically, the encoding / decoding unit 250 divides the data output from the data transceiver unit 260 into predetermined sizes and performs channel coding on the divided data. In addition, the encoding / decoding unit 250 decodes the data output from the modulation / demodulation unit 230 and concatenates the decoded data.

[0081] The data transceiver 260 performs transmission and reception of protocol data units (PDU) and service data units (SDU). Specifically, the data transceiver 260 performs assembly / disassembly of PDU / SDU in multiple layers (such as the medium access control layer (MAC), the radio link control layer (RLC), and the packet data convergence protocol layer (PDCP)). In addition, the data transceiver 260 performs error correction and retransmission control of data according to hybrid ARQ (Hybrid automatic repeat request).

[0082] The control unit 270 controls each functional block constituting the UE 200. In particular, in the present embodiment, the control unit 270 performs control related to NR-U.

[0083] Specifically, when the control unit 270 uses an unlicensed band Fu (a second band, also referred to as an unlicensed band) that is different from the "frequency band allocated for mobile communication (the first band)" (i.e., a licensed band (also referred to as an authorized band)", that is, when executing NR-U, the quasi-co-location (QCL) associated with the SSB is assumed based on the parameters included in the MIB.

[0084] The control unit 270 can assume the QCL associated with the SSB based on the DMRS sequence (A) and the SSB position index (identification information of the position of the synchronization signal block).

[0085] The control unit 270 can obtain the parameters for QCL derivation included in the master information block (MIB). The parameters for QCL derivation associated with the SSB may also be referred to as Q (hereinafter referred to as Q). In addition, the parameters may be referred to as QCL assumption information or other names.

[0086] Q may have several values, for example, Q may have values ​​of 1, 2, 4, 8, etc. In this case, 2 bits are required to notify Q from the network to the terminal.

[0087] In NR-U, in order to derive the QCL associated with SSB, as the value of Q, 1, 2, 4, and 8 can be supported.

[0088] In addition, the maximum number (=8) of PBCH DMRS sequences used in a cell (serving cell or neighboring cell) has not changed since 3GPP Release 15. In addition, the number of PBCH DMRS sequences (may be simply referred to as DMRS sequences) used in the cell does not depend on Q.

[0089] The least significant bits (LSBs) of the SSB candidate position index are 3 bits indicated by the index of the DMRS sequence.

[0090] Furthermore, when the value of Q is recognized, the control unit 270 can assume that a DRS (Discovery Reference Signal) having modulo (A, Q) “having the same value” is transmitted or the correlation of QCL between SSBs within the measurement window is achieved.

[0091] The control unit 270 uses the parameter (Q) to obtain the offset between the SSB and the CORESET (control resource set). CORESET can also be interpreted as a set of physical resources (a specific area on the NR downlink resource grid) and a set of parameters for sending PDCCH / DCI (Downlink Control Information).

[0092] Here, the CORESET acquired by the control unit 270 may be a special CORESET called CORESET#0.

[0093] CORESET#0 can also be interpreted as the CORESET for sending the PDCCH for SIB1 scheduling. The definition of CORESET is related to multiple parameters, but these parameters can be specified through RRC messages. CORESET#0 is used before sending RRC messages, so it may not be specified based on RRC messages.

[0094] The offset of SSB from CORESET (CORESET#0) can be expressed in units of physical resource blocks (PRBs) W. Alternatively, it can be expressed in units of resource elements (REs), resource element groups (REGs), etc. In addition, as described below, the offset can be expressed in units of k SSB The control unit 270 assumes a QCL associated with the SSB based on the acquired offset.

[0095] In addition, this parameter (Q) may be included in the field for CORESET of MIB. Specifically, Q may be included in controlResourceSetZero.

[0096] The control unit 270 may change the method of assuming the QCL associated with the SSB according to the obtained offset value. For example, according to k representing the offset SSB The value of changes the assumption of QCL associated with SSB. The specific method of assuming QCL will be described later. In addition, instead of "assuming" QCL, it can also be replaced by "deriving" QCL.

[0097] In addition, the MIB may include a parameter (Q) for deriving the QCL, and an offset between the SSB and the CORESET (CORESET#0). That is, the MIB may include Q and the offset (k SSB )both sides.

[0098] Therefore, the control unit 270 can assume the QCL associated with the SSB based on the parameters for deriving the QCL included in the MIB and the offset between the SSB and the CORESET included in the MIB.

[0099] Furthermore, in this case, the parameter (Q) and the offset (k SSB ) can be included in the subcarrier offset field of the SSB. Specifically, Q and k SSB Can be included in ssb-SubcarrierOffset.

[0100] Alternatively, the parameter (Q) for QCL derivation may be notified across a plurality of fields constituting the MIB to the UE 200. That is, the parameter (Q) for QCL derivation may be notified using two or more fields among the fields constituting the MIB.

[0101] In this case, the control unit 270 can assume the QCL associated with the SSB using the parameter (Q) for QCL derivation included across multiple fields constituting the MIB. In addition, an example of a specific field for notifying the parameter (Q) in this case will be described later.

[0102] (3) Operation of wireless communication system

[0103] Next, the operation of the wireless communication system 10 will be described. Specifically, the operation of the UE 200 assuming the QCL associated with the SSB in NR-U will be described.

[0104] As described above, in this embodiment, the parameter (Q) used for deriving the QCL of the SSB can be notified from the network (specifically, gNB100) to UE200 using MIB.

[0105] (3.1) Example of Master Information Block (MIB) structure

[0106] First, a configuration example of the MIB used for notification of the parameter (Q) for deriving the QCL of the SSB is described.

[0107] Figure 5 An example of the structure of MIB is shown. Figure 6 The following is a diagram showing a configuration example of PDCCH-ConfigSIB1 included in MIB. The configurations of MIB and PDCCH-ConfigSIB1 are defined in 3GPP TS38.331.

[0108] The MIB may contain system information sent via the BCH (Broadcast Channel). PDCCH-ConfigSIB1 can determine the common ControlResourceSet (CORESET#0), the common search space (CommonSearch Space), and the required PDCCH parameters. When ssb-SubcarrierOffset indicates that SIB1 does not exist, PDCCH-ConfigSIB1 can show the frequency position where UE20 can find SSB in SIB1, or the frequency range where the network does not provide SSB in SIB1.

[0109] In the case of NR-U, bits of the following fields contained in the MIB may be used for notification of Q.

[0110] controlResourceSetZero in PDCCH-ConfigSIB1: 1 or 2 bits

[0111] searchSpaceZero in PDCCH-ConfigSIB1: 1 bit

[0112] ssb-SubcarrierOffset: 1 bit

[0113] ·subCarrierSpacingCommon: 1 bit

[0114] Spare: 1 bit

[0115] (3.2) Structure of controlResourceSetZero

[0116] As described above, in the case of NR-U, as the value of Q, 1, 2, 4, and 8 can be supported, so 2 bits are required to notify Q. Therefore, if 2 bits of controlResourceSetZero can be secured, it is preferable to notify Q using controlResourceSetZero.

[0117] Regarding controlResourceSetZero (4 bits), in the case of NR-U, the following structure may be preferably considered to generate a table for NR-U (3GPP TSTS38.213 Table 13-1 to 13-10).

[0118] ·SS / PBCH block and CORESET multiplexing pattern: 1

[0119] ·Number of CORESET RBs:48(30kHz SCS),96(15kHz SCS)

[0120] ·Number of CORESET Symbols:1or 2

[0121] Here, the offset (k SSB ,PRBs) is 2 values ​​(1 bit), Q can be notified only by controlResourceSetZero. However, regarding the value of this offset, the structure of the channel grid and the synchronization grid (Synchronization raster) needs to be considered.

[0122] The channel raster defines the RF reference frequencies (F) that can be used to identify the locations of uplink (UL) and downlink (DL) radio frequency (RF) channels. REF ). In addition, in the absence of explicit signaling of the synchronization signal block position, the synchronization grid can indicate the frequency position of the SSB that the terminal can use to obtain system information.

[0123] Table 1 shows a configuration example of controlResourceSetZero when the offset has two values ​​(SCS=30 kHz).

[0124] [Table 1]

[0125]

[0126] In view of the structure of the channel grid and synchronization grid for NR-U, the frequency direction configuration of SSB is 5 in SSB and 2 in CORESET#0.

[0127] Figure 7 An example of the configuration of CORESET#0 and SSB in the frequency direction for NR-U is shown. Figure 7The upper half shows the overall structure of the CORESET#0 and SSB pattern, and the lower half shows an enlarged view of PRB#0 to PRB#5.

[0128] like Figure 7 As shown, CORESET#0 can have two modes starting from PRB#1 or PRB#2. In addition, SSB (SS / PBCH) can have five modes starting from PRB#0, 1, 2, 3, 4. In addition, Figure 7 The example of SCS=30kHz is shown (the same applies below). SSB Indicates the offset (PRB) from the reference position (grid position) in units of SCS=15kHz.

[0129] When following the content of 3GPP Release-15 to determine the offset between SSB and CORESET#0 (k SSB ) (TS38.21313), as shown below, the indication of the offset requires 3 values.

[0130] ·Offset=0: (SSB, CORESET#0)=(#1, #1), (#2, #2),

[0131] ·Offset=2: (SSB, CORESET#0)=(#3, #1), (#4, #2)

[0132] ·Offset=-1: (SSB, CORESET#0)=(#0, #1)

[0133] (3.3) Action of notification parameter (Q)

[0134] The following describes three examples of using MIB to notify NR-U of the parameters (Q) used to derive the QCL of the SSB.

[0135] (Operation Example 1) Notification using 2 bits in controlResourceSetZero

[0136] In this case, the method of deriving the offset values ​​of SSB and CORESET#0 is changed.

[0137] (Action Example 2) Notification using ssb-SubcarrierOffset

[0138] In this case, k SSB Combined with Q, ssb-SubcarrierOffset is used for notification.

[0139] (Action Example 3) Notification using multiple fields of MIB

[0140] In this case, two or more fields are combined for notification.

[0141] (3.3.1) Action Example 1

[0142] In this operation example, by changing the method of deriving the offset value of SSB and CORESET#0, the offset value can be set to two values. Thus, the two bits of controlResourceSetZero can be used for Q notification.

[0143] Figure 8 An example of the configuration of CORESET#0 and SSB in the frequency direction (position of PRB) for NR-U according to the provisions of 3GPP Release-15 is shown.

[0144] Specifically, in Figure 8 In the configuration example shown, the offset value (k SSB ) is derived according to the provisions of TS38.21313. More specifically, k is derived according to the following provisions SSB .

[0145] “The offset in Tables 13-1 through 13-10 is defined with respect to the SCS of the CORESET for Type0-PDCCH CSS set, provided by subCarrierSpacingCommon, from the smallest RB index of the CORESET for Type0-PDCCH CSS set to the smallest RB index of the common RB overlapping with the first RB of the corresponding SS / PBCH block. (Relative to the SCS of the CORESET for Type0-PDCCH CSS set provided by subCarrierSpacingCommon, the offsets in Tables 13-1 to 13-10 are defined, starting from the smallest RB index of the CORESET for Type0-PDCCH CSS set to the smallest RB index of the common RB overlapping with the first RB of the corresponding SS / PBCH block)”.

[0146] exist Figure 8In the configuration example shown, CORESET#0 starts from PRB#1. When focusing on the SSB of Start PRB#3, the smallest PRB that overlaps CORESET#0 and SSB in the frequency direction is PRB#3, and the offset value (k SSB ,RBs) is “2”((SSB,CORESET#0)=(#3,#1)).

[0147] Fig. 9 This is an explanatory diagram of a change in the method of deriving the offset value between SSB and CORESET#0 in an example of the arrangement of CORESET#0 and SSB in the frequency direction (position of PRB).

[0148] like Fig. 9 As shown, the setting of the PRB index (Index) is changed. Figure 8 In the example shown, it is possible to use the absolute PRB Index (#0 to 5) without relying on the start position of SSB and CORESET#0, but Fig. 9 In the example, the PRB Index (1 to 4) shown in the upper half is used.

[0149] The index of the PRB is based on k SSB The situation is divided according to the value of k SSB ≥6, the first (smallest index value) RB of the corresponding SSB (SS / PBCH) can be interpreted as the index of the common RB overlapping with CORESET#0. SSB When <6, the second smallest RB of the corresponding SSB (SS / PBCH) can be interpreted as the index of the common RB overlapping with CORESET#0.

[0150] That is, in k SSB ≥6, it can be interpreted as an index based on the RB with the smallest SSB value overlapping with CORESET#0 in the frequency direction. SSB When <6, it can be interpreted as an index based on the RB with the second smallest SSB value overlapping with CORESET#0 in the frequency direction.

[0151] Therefore, when focusing on the SSB of Start PRB#3, the offset value (k SSB , RBs) is "2" when the starting position of CORESET#0 is #2. According to this offset value derivation method, the offset value (k SSB ) is 2 values ​​(0 or 2) (the offset value of the SSB of Start PRB#2 can be 0 or 2).

[0152] In the case of this method of deriving the offset value, if it is based on the provisions of Chapter 13 of TS38.213, it can be stipulated as follows.

[0153] "The offset in Tables 13-1through 13-10is defined with respect to theSCS of the CORESET for Type0-PDCCH CSS set,provided bysubCarrierSpacingCommon,from the smallest RB index of the CORESET for Type0-PDCCH CSS set to the smallest RB index if k SSB is less than 6, or the 2 nd smallest RB index if k SSB is larger than or equal to 6,of the common RB overlapping with the first RB of the corresponding SS / PBCH block.(Relative to the SCS of the CORESET of the Type0-PDCCH CSS set provided by subCarrierSpacingCommon, the offsets in Tables 13-1 to 13-10 are defined, starting from the minimum RB index of the CORESET of the Type0-PDCCH CSS set to the minimum RB index of the common RB overlapping with the first RB of the corresponding SS / PBCH block (if k SSB less than 6), or until the second smallest RB index of the common RB overlapping with the first RB of the corresponding SS / PBCH block (if k SSB Greater than or equal to 6))".

[0154] Here, if k SSB is less than 6, or the 2 nd smallest RB index if k SSB islarger than or equal to 6”, in k SSB When the SSB is greater than 6 RB, the offset value of "the PRB of the SSB with the second smallest value that overlaps with CORESET#0" is used (refer to Fig. 9) The solid line box of Start PRB#=3.

[0155] In addition, at the offset value (k SSB ) is "6", the smallest RB index can be used as the benchmark, or the second smallest RB index can be used as the benchmark.

[0156] (3.3.2) Action Example 2

[0157] In this operation example, the offset value (k SSB ), in the case of NR-U, it is assumed that the SSB and SCS of CORESET#0 are the same.

[0158] Table 2 shows RB index, k SSB And the combination example of Q.

[0159] [Table 2]

[0160] index <![CDATA[k SSB ]]> Q 0 0 1 1 2 1 2 4 1 3 6 1 4 8 1 5 10 1 6 0 2 7 2 2 8 4 2 9 6 2 10 8 2 11 10 2 12 0 4 13 2 4 14 4 4 15 6 4 16 8 4 17 10 4 18 0 8 19 2 8 20 4 8 21 6 8 22 8 8 23 10 8

[0161] As shown in Table 2, k SSB The value of can be notified through 12 values ​​from 0 to 11. In addition, it is agreed that k SSB The value of can also be 0, 2, 4, 6, 8, 10, so k SSB and Q can be notified using ssb-SubcarrierOffset. SSB The value of is not necessarily limited to the six values ​​of 0, 2, 4, 6, 8, and 10, and may be different therefrom. In addition, as described above, Q is a parameter for deriving the QCL of SSB, but it may also be called by other names.

[0162] (3.3.3) Action Example 3

[0163] In this operation example, a plurality of fields in MIB are used to notify the parameter (Q). Specifically, Q is notified by combining two of the fields in MIB shown below.

[0164] controlResourceSetZero in PDCCH-ConfigSIB1

[0165] searchSpaceZero in PDCCH-ConfigSIB1

[0166] ssb-SubcarrierOffset

[0167] subCarrierSpacingCommon

[0168] ·spare

[0169] For example, as shown in Table 3, the value of Q may be mapped into a 2-bit table, using different fields to indicate the LSB (least significant bit) and the MSB (most significant bit), respectively.

[0170] [Table 3]

[0171] Q LSB MSB 1 0 0 2 0 1 4 1 0 8 1 1

[0172] (4) Action and Effect

[0173] According to the above-mentioned embodiment, the following effects can be obtained. Specifically, UE 200 can obtain the offset (k) between SSB and CORESET#0 using the QCL derivation parameter (Q) included in the MIB. SSB ) and, based on the offset obtained, assume the QCL associated with that SSB.

[0174] Therefore, UE200 can use MIB to quickly obtain the parameter Q used to derive QCL of SSB, and can also achieve good initial access in NR-U.

[0175] In this embodiment, the parameter (Q) can be included in controlResourceSetZero. UE200 can change the assumption method of QCL associated with SSB according to the value of the offset. Therefore, even when the number of bits of controlResourceSetZero is limited, UE200 can change the assumption method of QCL according to the value of the offset, thereby reliably assuming the QCL associated with SSB.

[0176] In addition, UE 200 can obtain the parameter (Q) included in the MIB and the offset (k) between the SSB and CORESET#0 included in the MIB. SSB ), assuming the QCL associated with the SSB. Therefore, UE200 obtains the parameter (Q) and offset (k) via MIB. SSB ), good initial access can also be achieved in NR-U.

[0177] In this embodiment, the parameter (Q) and the offset (k SSB ) may be included in ssb-SubcarrierOffset. Therefore, it is possible to use MIB and efficiently and reliably notify the UE 200 of the parameter (Q) and the offset (k SSB ).

[0178] In addition, UE200 can also obtain the parameter (Q) included across multiple fields constituting MIB. Therefore, UE200 obtains the parameter (Q) and offset (k SSB), good initial access can also be achieved in NR-U.

[0179] (5) Other Implementation Methods

[0180] As mentioned above, although the content of this invention was demonstrated based on an Example, this invention is not limited to these descriptions, Various deformation|transformation and improvement are possible, and it is obvious to a person skilled in the art.

[0181] For example, as described above, the parameter (Q) may be referred to by other names such as QCL assumption information or a parameter for QCL derivation.

[0182] In the above-mentioned embodiment, the parameter (Q) and the like are notified using the master information block, but the parameter (Q) and the like may be notified using other system information (SIB).

[0183] In addition, the unlicensed band may be referred to by different names, such as License-exempt or Licensed-Assisted Access (LAA).

[0184] The block diagram used in the description of the above-mentioned embodiment ( Figure 4 ) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, using wires, wirelessly, etc.) and implemented using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0185] Functionally, it includes judging, determining, judging, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but is not limited to these. For example, the functional block (structural part) that enables the transmission function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

[0186] Furthermore, the above-mentioned UE 200 may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig.10 2 is a diagram showing an example of the hardware structure of UE 200. Fig.10 As shown, UE 200 may also be configured as a computer device including a processor 1001 , a memory 1002 (memory), a storage 1003 (storage), a communication device 1004 , an input device 1005 , an output device 1006 , and a bus 1007 .

[0187] In the following description, the word "device" may be replaced by "circuit", "device", "unit", etc. The hardware structure of the device may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0188] Functional blocks of UE200 (see Figure 4 ) is implemented by any hardware element or combination of hardware elements of the computer device.

[0189] In addition, each function in UE200 is implemented by the following method: predetermined software (program) is read into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of the reading and writing of data in memory 1002 and storage 1003.

[0190] The processor 1001 controls the entire computer by, for example, running an operating system. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, a register, and the like.

[0191] In addition, the processor 1001 reads a program (program code), a software module or data, etc. from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and performs various processes accordingly. As a program, a program that causes a computer to perform at least a part of the actions described in the above-mentioned embodiments is used. In addition, with respect to the above-mentioned various processes, although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be installed by more than one chip. In addition, the program can also be sent from the network via a telecommunication line.

[0192] The memory 1002 is a computer-readable recording medium, and may be composed of 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 referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 may store a program (program code), a software module, etc. that can execute a method according to an embodiment of the present disclosure.

[0193] The memory 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a compressed disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (e.g., a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic strip, etc. The memory 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, other appropriate media such as a database, a server, etc. that includes at least one of the memory 1002 and the memory 1003.

[0194] The communication device 1004 is hardware (transceiver) used to communicate between computers via at least one of a wired network and a wireless network, and may also be called a network device, a network controller, a network card, a communication module, etc.

[0195] The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., for example, in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD).

[0196] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0197] In addition, the processor 1001 and the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using different buses for each device.

[0198] In addition, 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), a field programmable gate array (FPGA), etc., and a part or all of each functional block may be implemented by the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

[0199] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information: DCI), uplink control information (Uplink Control Information: UCI)), high-level signaling (e.g., RRC signaling, medium access control (Medium Access Control: MAC) signaling, broadcast information (Master Information Block: MIB, System Information Block: SIB)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, for example, it may also be an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, etc.

[0200] Each form / embodiment described in the present disclosure may also be applied to at least one of Long Term Evolution (LTE), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), a system using other appropriate systems, and a next-generation system extended therefrom. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may also be applied.

[0201] The processing procedures, timings, processes, etc. of each form / implementation described in this disclosure may be changed in order without contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0202] In the present disclosure, specific actions performed by a base station are sometimes performed by its upper node depending on the situation. In a network consisting of one or more network nodes having a base station, various actions performed to communicate with a terminal can be performed by at least one of the base station and other network nodes other than the base station (for example, consider MME or S-GW, etc., but not limited to these). In the above, the case where there is one other network node other than the base station is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0203] Information, signals (information, etc.) can be output from a higher layer (or lower layer) to a lower layer (or higher layer), and can also be input or output via multiple network nodes.

[0204] The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0205] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0206] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched depending on the execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., notification of the scheduled information is not performed).

[0207] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0208] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a web page, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0209] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0210] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0211] As used in this disclosure, the terms "system" and "network" may be used interchangeably.

[0212] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0213] The names used for the above parameters are not limiting in any way. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by appropriate names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0214] In the present disclosure, the terms "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier" and the like are used interchangeably. Sometimes, the base station is also referred to as macro cell, small cell, micro cell, pico cell and the like.

[0215] A base station can accommodate one or more (for example, 3) 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 also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head: RRH).

[0216] The terms "cell" or "sector" refer to a part or the entirety of a coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0217] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0218] For mobile stations, those skilled in the art sometimes also use the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

[0219] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0220] In addition, the base station in the present disclosure may also be replaced by a mobile station (user terminal, the same below). For example, regarding a structure in which the communication between a base station and a mobile station is replaced by communication between multiple mobile stations (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything, etc.), the various forms / implementations of the present disclosure may also be applied. In this case, it may also be a structure in which the mobile station has the functions of the base station. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0221] Likewise, the mobile station in the present disclosure may be replaced by a base station. In this case, the base station may have the same functions as the mobile station.

[0222] A radio frame may be composed of one or more frames in the time domain. In the time domain, one or more frames may be referred to as subframes.

[0223] A subframe may also be composed of one or more time slots in the time domain. A subframe may be a fixed time length (eg, 1 ms) that is independent of numerology.

[0224] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may, for example, represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, wireless frame structure, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, and the like.

[0225] A slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0226] A time slot may contain multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in units of time greater than a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type B.

[0227] A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent time units for transmitting signals. A radio frame, a subframe, a time slot, a mini-time slot, and a symbol may be referred to by other corresponding names.

[0228] For example, 1 subframe can be called a transmission time interval (TTI), multiple consecutive subframes can also be called a TTI, and 1 time slot or 1 mini time slot can also be called a TTI. That is, at least one of the subframe and the TTI can be a subframe (1ms) in the existing LTE, or a period shorter than 1ms (for example, 1-13 code elements), or a period longer than 1ms. In addition, the unit representing TTI can be a time slot, a mini time slot, etc. instead of a subframe.

[0229] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules the allocation of wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI. In addition, the definition of TTI is not limited to this.

[0230] TTI can be a transmission time unit for data packets (transport blocks), code blocks, code words, etc. after channel coding, or a processing unit for scheduling, link adaptation, etc. In addition, when TTI is assigned, the time interval (e.g., the number of symbols) to which the transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0231] In addition, when 1 time slot or 1 mini time slot is called TTI, more than one TTI (ie, more than one time slot or more than one mini time slot) can constitute the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can be controlled.

[0232] A TTI having a time length of 1 ms is also called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-time slot, a sub-time slot, a time slot, etc.

[0233] In addition, for a long TTI (for example, a normal TTI, a subframe, etc.), it can be replaced with a TTI having a time length exceeding 1ms, and for a short TTI (for example, a shortened TTI, etc.), it can be replaced with a TTI length that is smaller than the long TTI (longTTI) and has a TTI length of more than 1ms.

[0234] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers contained in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers contained in an RB may also be determined according to the parameter set.

[0235] In addition, the time domain of an RB may include one or more symbols, and may be the length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. may be composed of one or more resource blocks, respectively.

[0236] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, and the like.

[0237] In addition, a resource block may be composed of one or more resource elements (RE). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

[0238] Bandwidth Part (BWP) (also called partial bandwidth, etc.) represents a subset of contiguous common RBs (common resource blocks) for a parameter set in a certain carrier. Here, the common RB can be determined by the index of the RB based on the common reference point of the carrier. PRBs are defined in a certain BWP and numbered within the BWP.

[0239] 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.

[0240] At least one of the set BWPs may be active, and it is not assumed that the UE transmits or receives a predetermined signal / channel outside the activated BWP. In addition, "cell", "carrier" and the like in the present disclosure may be replaced with "BWP".

[0241] The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.

[0242] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include the situation where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used to replace "connection". In the context of the present disclosure, for two elements, it may be considered that they are "connected" or "coupled" to each other by using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible) region, etc.

[0243] The reference signal may be referred to as RS (Reference Signal) for short, or may be referred to as a pilot signal according to the applied standard.

[0244] The phrase "according to" used in the present disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to".

[0245] The "unit" in the configuration of each of the above-mentioned devices may be replaced with a "section", "circuit", "device" or the like.

[0246] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not necessarily limit the number and order of these elements. These terms are used in this disclosure as a simple method to distinguish between two or more elements. Therefore, a reference to a first and a second element does not mean that only two elements can be used here or that the first element must precede the second element in any form.

[0247] When the terms "include," "including," and variations thereof are used in the present disclosure, these terms are intended to be inclusive, as is the term "comprising." Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0248] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure also includes the case where the noun following the article is in plural form.

[0249] The terms "determining" and "determining" used in the present disclosure sometimes also include various actions. "Determining" and "determining" may include, for example, considering matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include considering matters that have been received (for example, receiving information), transmitted (for example, transmitting information), input, output, accessed (for example, accessed data in memory) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include considering matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. as matters that have been "judged" or "determined". That is, "determining" and "determining" may include matters that have been "judged" or "determined" by any action. In addition, the word “determine” can also be replaced by “assuming”, “expecting”, “considering”, etc.

[0250] In the present disclosure, the term "A and B are different" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" are also interpreted in the same way as "different".

[0251] The present disclosure is described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0252] Description of labels:

[0253] 10 Wireless Communication Systems

[0254] 20 NG-RAN

[0255] 100 gNB

[0256] 200 UE

[0257] 210 Wireless signal transceiver

[0258] 220 Amplifier

[0259] 230 Modem Unit

[0260] 240 Control signal and reference signal processing unit

[0261] 250 Encoding / Decoding Unit

[0262] 260 Data Transceiver

[0263] 270 Control Department

[0264] 1001 Processor

[0265] 1002 Memory

[0266] 1003 Memory

[0267] 1004 Communication device

[0268] 1005 Input Device

[0269] 1006 Output Device

[0270] 1007 Bus

Claims

1. A terminal, wherein: The terminal has: a receiving unit that receives a master information block from a network; and a control unit, which obtains parameters for quasi-co-location derivation for unlicensed band based on a part of bits indicating a subcarrier offset of a synchronization signal block and bits indicating a common subcarrier spacing included in the master information block, The value of the parameter for quasi co-location derivation is mapped to a table including a portion of bits representing the synchronization signal block subcarrier offset and bits representing the common subcarrier spacing, The control unit assumes a value of the parameter for quasi co-location derivation using the table for a combination of bits included in the master information block received in the unlicensed band.

2. The terminal according to claim 1, wherein: The control unit uses one bit of the synchronization signal block subcarrier offset.

3. A wireless base station, wherein: The wireless base station has: a control unit that sets a main information block; and a sending unit, which sends the main information block to the terminal, The transmitting unit notifies the parameters for quasi co-location derivation based on a part of the bits indicating the subcarrier offset of the synchronization signal block and the bits indicating the common subcarrier spacing included in the master information block, The value of the parameter for quasi co-location derivation is mapped to a table including a portion of bits representing the synchronization signal block subcarrier offset and bits representing the common subcarrier spacing, The table is used to cause the terminal to assume the value of the parameter for quasi co-location derivation for a combination of bits included in the master information block received in an unlicensed band.

4. A wireless communication method, wherein: The wireless communication method comprises the following steps: A receiving step, receiving a master information block from a network; as well as a control step of obtaining parameters for quasi-co-location derivation for an unlicensed band based on a portion of bits indicating a subcarrier offset of a synchronization signal block and bits indicating a common subcarrier spacing contained in the master information block, The value of the parameter for quasi co-location derivation is mapped to a table including a portion of bits representing the synchronization signal block subcarrier offset and bits representing the common subcarrier spacing, In the control step, the table is used to assume a value of the parameter for quasi co-location derivation for a combination of bits included in the master information block received in the unlicensed band.

Images