Apparatus and method for receiving downlink data in wireless communication system

Abstract

According to various embodiments of the present disclosure, an operation method of a user equipment (UE) in a wireless communication system comprises the steps of: receiving, from a base station (BS), a master information block (MIB) including configuration information related to a total number of consecutive resource blocks for a control resource set (CORESET) # 0; receiving a physical downlink control channel (PDCCH) related to a system information block 1 (SIB1) from the BS by a CORESET # 0 configured with a second resource block obtained by excluding a first resource block from among the resource blocks on the basis of i) the total number of resource blocks and ii) the channel bandwidth, in which a specific number of first resource blocks among the resource blocks are punctured; and receiving a physical downlink shared channel (PDSCH) related to SIB1 from the BS through an initial downlink (DL) bandwidth portion (BWP) based on the PDCCH, in which the initial DL BWP is defined by the number of second resource blocks configuring CORESET # 0 and the positions of the second resource blocks based on the puncturing of the first resource blocks.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to an apparatus and method for receiving downlink data in a wireless communication system. Background Art

[0002] Wireless communication systems are widely deployed to provide various types of communication services, such as voice and data. Generally, wireless communication systems are multiple-access systems capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmit power, etc.). Examples of multiple-access systems include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single-carrier frequency division multiple access (SC-FDMA). Summary of the Invention

[0003] Technical issues

[0004] To solve the above and other problems, the present disclosure provides an apparatus and method for receiving downlink data in a wireless communication system.

[0005] The technical objectives to be achieved by the present disclosure are not limited to the technical objectives described above merely by way of example, and those skilled in the art in the art to which the present disclosure pertains can clearly understand other technical objectives not mentioned from the following description.

[0006] Technical Solution

[0007] According to various embodiments of the present disclosure, a method for operating a user equipment (UE) in a wireless communication system is provided, the method including the following steps: receiving a master information block (MIB) from a base station (BS), the MIB including configuration information related to a total number of consecutive resource blocks for a control resource set (CORESET) #0; receiving a physical downlink control channel (PDCCH) related to a system information block 1 (SIB1) from the base station through CORESET #0 including second resource blocks excluding first resource blocks from the resource blocks, assuming that a specific number of first resource blocks among the resource blocks are punctured, based on i) the total number of resource blocks and ii) a channel bandwidth; and receiving a physical downlink shared channel (PDSCH) related to SIB1 from the base station via an initial downlink (DL) bandwidth part (BWP) based on the PDCCH, wherein the initial DL BWP is defined by the number of second resource blocks forming CORESET #0 and positions of the second resource blocks based on puncturing of the first resource blocks.

[0008] According to various embodiments of the present disclosure, a method for operating a base station (BS) in a wireless communication system is provided, the method including the following steps: transmitting a master information block (MIB) to a user equipment (UE), the MIB including configuration information related to the total number of consecutive resource blocks for a control resource set (CORESET) #0; transmitting a physical downlink control channel (PDCCH) related to a system information block 1 (SIB1) to the UE through CORESET #0 including second resource blocks excluding the first resource blocks from the resource blocks, based on i) the total number of resource blocks and ii) a channel bandwidth, performing puncturing of a specific number of first resource blocks among the resource blocks; and transmitting a physical downlink shared channel (PDSCH) related to the SIB1 to the UE via an initial downlink (DL) bandwidth part (BWP) based on the PDCCH, and based on the puncturing of the first resource blocks, the initial DL BWP being defined by the number of second resource blocks forming CORESET #0 and positions of the second resource blocks.

[0009] According to various embodiments of the present disclosure, a user equipment (UE) in a wireless communication system is provided, wherein the UE includes a transceiver, at least one processor, and at least one memory, wherein the at least one memory is operably connected to the at least one processor and is configured to store instructions for performing operations based on execution by the at least one processor, wherein the operations include all steps of the method for operating the UE according to various embodiments of the present disclosure.

[0010] According to various embodiments of the present disclosure, a base station in a wireless communication system is provided, wherein the base station includes a transceiver, at least one processor, and at least one memory, wherein the at least one memory is operably connected to the at least one processor and is configured to store instructions for performing operations based on execution by the at least one processor, wherein the operations include all steps of the method for operating a base station according to various embodiments of the present disclosure.

[0011] According to various embodiments of the present disclosure, a control device for controlling a user equipment (UE) in a wireless communication system is provided, the control device including at least one processor and at least one memory operably connected to the at least one processor, wherein the at least one memory is configured to store instructions for performing operations based on execution by the at least one processor, and the operations include all steps of the method for operating the UE according to various embodiments of the present disclosure.

[0012] According to various embodiments of the present disclosure, a control device for controlling a base station in a wireless communication system is provided, the control device comprising at least one processor and at least one memory operably connected to the at least one processor, wherein the at least one memory is configured to store instructions for performing operations based on execution by the at least one processor, and the operations include all steps of the method for operating a base station according to various embodiments of the present disclosure.

[0013] According to various embodiments of the present disclosure, one or more non-transitory computer-readable media storing one or more instructions are provided, wherein the one or more instructions are configured to perform operations based on execution by one or more processors, and the operations include all steps of a method of operating a user equipment (UE) according to various embodiments of the present disclosure.

[0014] According to various embodiments of the present disclosure, one or more non-transitory computer-readable media storing one or more instructions are provided, wherein the one or more instructions are configured to perform operations based on being executed by one or more processors, and the operations include all steps of the method of operating a base station according to various embodiments of the present disclosure.

[0015] Beneficial effects

[0016] To solve the above and other problems, the present disclosure may provide an apparatus and method for receiving downlink data in a wireless communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the detailed description. The drawings illustrate embodiments of the present disclosure and, together with the description, are used to explain the technical features of the present disclosure. The technical features of the present disclosure are not limited to the specific drawings, and the features disclosed in each drawing can be combined with each other to form new embodiments. The reference numerals in each drawing may represent structural elements.

[0018] Figure 1 Examples of physical channels used in a system applicable to the present disclosure and a general signal transmission method using the physical channels are shown.

[0019] Figure 2 An example of a synchronization signal block (SSB) suitable for use in the system of the present disclosure is shown.

[0020] Figure 3 An example of transmission of synchronization signal blocks (SSBs) in a system suitable for use with the present disclosure is shown.

[0021] Figure 4 An example of an initial access procedure in a system applicable to the present disclosure is shown.

[0022] Figure 5 An example of an initial DL BWP suitable for use in the system of the present disclosure is shown.

[0023] Figure 6 An example of an initial DL BWP suitable for use in the system of the present disclosure is shown.

[0024] Figure 7 An example of an operation process of a UE in the system applicable to the present disclosure is shown.

[0025] Figure 8 An example of an operation process of a base station in the system applicable to the present disclosure is shown.

[0026] Figure 9 An example of the structure of the first device and the second device applicable to the system of the present disclosure is shown. DETAILED DESCRIPTION

[0027] In various embodiments of the present disclosure, "A or B" may mean "only A," "only B," or "both A and B." In other words, in various embodiments of the present disclosure, "A or B" may be interpreted as "A and / or B." For example, in various embodiments of the present disclosure, "A, B, or C" may mean "only A," "only B," "only C," or "any combination of A, B, and C."

[0028] A slash ( / ) or a comma used in various embodiments of the present disclosure may represent "and / or". For example, "A / B" may represent "A and / or B". Thus, "A / B" may represent "only A", "only B", or "both A and B". For example, "A, B, C" may represent "A, B, or C".

[0029] In various embodiments of the present disclosure, “at least one of A and B” may mean “only A,” “only B,” or “both A and B.” Furthermore, in various embodiments of the present disclosure, the expression “at least one of A or B” or “at least one of A and / or B” may be interpreted as having the same meaning as “at least one of A and B.”

[0030] Furthermore, in various embodiments of the present disclosure, “at least one of A, B, and C” may mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.” Furthermore, “at least one of A, B, or C” or “at least one of A, B, and / or C” may mean “at least one of A, B, and C.”

[0031] In addition, the brackets used in various embodiments of the present disclosure may represent "for example". Specifically, when describing "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information". In other words, the "control information" in various embodiments of the present disclosure is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". In addition, even when describing "control information (i.e., PDCCH)", "PDCCH" may be proposed as an example of "control information".

[0032] In various embodiments of the present disclosure, technical features described separately in one drawing may be implemented separately or simultaneously.

[0033] General signal transmission method in 3GPP

[0034] Physical channels and general signaling

[0035] Figure 1 An example of a physical channel used in a system applicable to the present disclosure and a general signal transmission method using the physical channel is shown. More specifically, Figure 1 Shown are physical channels and general signal transmission used in the 3GPP system.

[0036] Figure 1 This figure shows the physical channels and general signal transmission used in 3GPP systems. In wireless communication systems, a UE receives information from a base station (eNB) via a downlink (DL) and transmits information to the eNB via an uplink (UL). The information transmitted and received by the eNB and UE includes data and various control information. Various physical channels exist depending on the type and purpose of the information transmitted and received by the eNB and UE.

[0037] In S11, a UE that is powered on again after power failure or enters a new cell performs an initial cell search operation, such as synchronization with a base station (BS). To this end, the UE receives a primary synchronization channel (PSCH) and a secondary synchronization channel (SSCH) from the base station to synchronize with the base station and obtain information such as a cell identity (ID). In addition, the UE can receive a physical broadcast channel (PBCH) from the base station and obtain intra-cell broadcast information. The UE can receive a downlink reference signal (DL RS) during the initial cell search step to check the downlink channel status.

[0038] In S12, the UE that has completed the initial cell search may receive a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) corresponding to the PDCCH to obtain more detailed system information.

[0039] Next, in S13 to S16, the UE may perform a random access procedure to complete access to the base station. Specifically, in S13, the UE may send a preamble on the physical random access channel (PRACH), and in S14 receive a random access response (RAR) for the preamble on the PDCCH and the PDSCH corresponding to the PDCCH. Thereafter, in S15, the UE may use the scheduling information in the RAR to send a physical uplink shared channel (PUSCH), and in S16, perform a contention resolution procedure such as the PDCCH and the PDSCH corresponding to the PDCCH.

[0040] Next, the UE that performs the above process can perform PDCCH / PDSCH reception S17 and PUSCH / physical uplink control channel (PUCCH) transmission S18 as a general uplink / downlink signal transmission process. The control information sent by the UE to the base station is called uplink control information (UCI). UCI includes hybrid automatic repeat request (HARQ) confirmation / negative ACK (ACK / NACK), scheduling request (SR), channel state information (CSI), etc. CSI includes channel quality indication (CQI), precoding matrix indication (PMI), rank indication (RI), etc. UCI is usually sent on PUCCH, but if control information and data need to be sent at the same time, it can also be sent on PUSCH. The UE can send UCI on PUSCH non-periodically based on the request / indication of the network.

[0041] Initial Access (IA) Process

[0042] Synchronization Signal Block (SSB) transmission and related operations

[0043] Figure 2 An example of a synchronization signal block (SSB) suitable for use in the system of the present disclosure is shown.

[0044] The UE can perform cell search, system information acquisition, beam alignment for initial access, DL measurement, etc. based on the SSB. The SSB can be used interchangeably with the synchronization signal / physical broadcast channel (SS / PBCH) block.

[0045] refer to Figure 2, SSB includes PSS, SSS and PBCH. SSB consists of four consecutive OFDM symbols, and PSS, PBCH, SSS / PBCH or PBCH is transmitted per OFDM symbol. Each of PSS and SSS consists of one OFDM symbol and 127 subcarriers, and PBCH consists of 3 OFDM symbols and 576 subcarriers. PBCH is encoded / decoded based on polar code and modulated / demodulated according to quadrature phase shift keying (QPSK). The PBCH in the OFDM symbol includes data resource elements (REs) to which the complex modulation values of the PBCH are mapped and DMRS REs to which the demodulation reference signal (DMRS) for the PBCH is mapped. There are three DMRS REs per resource block of the OFDM symbol, and there are three data REs between the DMRS REs.

[0046] Cell Search

[0047] Cell search is the process by which a UE acquires time / frequency synchronization with a cell and detects the cell identifier (ID) of the cell, such as the physical layer cell ID (PCI). The PSS is used to detect a cell ID from a cell ID group, and the SSS is used to detect a cell ID group. The PBCH is used to detect the SSB (time) index and half-frame.

[0048] The cell search process of the UE can be summarized as shown in Table 1 below.

[0049] [Table 1]

[0050]

[0051] There are 336 cell ID groups, each with three cell IDs. There are a total of 1008 cell IDs. Information about the cell ID group to which a cell's cell ID belongs is provided / acquired via the cell's SSS, and information about the cell IDs of the 336 cells is provided / acquired via the PSS.

[0052] Figure 3 An example of transmission of synchronization signal blocks (SSBs) in a system suitable for use with the present disclosure is shown.

[0053] SSB is sent periodically according to the SSB period. The default SSB period assumed by the UE during the initial cell search is defined as 20ms. After cell access, the SSB period can be set by the network (e.g., BS) to one of {5ms, 10ms, 20ms, 40ms, 80ms, 160ms}. The SSB burst set is configured at the beginning of the SSB period. The SSB burst set includes a 5ms time window (i.e., half a frame), and the SSB can be sent up to N times within the SS burst set. The maximum number of SSB transmissions L can be given as follows based on the frequency band of the carrier. One time slot includes up to two SSBs.

[0054] - For the frequency range up to 3 GHz, L = 4

[0055] - For the frequency range from 3 GHz to 6 GHz, L = 8

[0056] - For the frequency range from 6 GHz to 52.6 GHz, L = 64

[0057] The temporal positions of the SSB candidates in the SS burst set may be defined based on the subscriber interval.The temporal positions of the SSB candidates are indexed in temporal order from 0 to L-1 (SSB index) within the SSB burst set (ie, half-frame).

[0058] Multiple SSBs may be transmitted within the frequency span of a carrier. The physical layer cell identifiers of these SSBs do not need to be unique, and other SSBs may have other physical layer cell identifiers.

[0059] The UE can acquire DL synchronization by detecting SSBs. The UE can identify the structure of the SSB burst set based on the detected SSB (time) index and can therefore detect symbol / slot / half-frame boundaries. The system frame number (SFN) information and half-frame indication information can be used to identify the frame / half-frame number to which the detected SSB belongs.

[0060] Specifically, the UE can obtain the 10-bit SFN of the frame to which the PBCH belongs from the PBCH. Next, the UE can obtain the 1-bit half-frame indication information. For example, if the UE detects a PBCH with the half-frame indication bit set to 0, the UE can determine that the SSB to which the PBCH belongs belongs to the first half-frame in the frame, and if the UE detects a PBCH with the half-frame indication bit set to 1, the UE can determine that the SSB to which the PBCH belongs belongs to the second half-frame in the frame. Finally, the UE can obtain the SSB index of the SSB to which the PBCH belongs based on the DMRS sequence and the PBCH payload carried by the PBCH.

[0061] System information acquisition

[0062] System information (SI) is divided into a master information block (MIB) and multiple system information blocks (SIBs). SI other than the MIB may be referred to as remaining minimum system information (RMSI). Please refer to the following for details.

[0063] -MIB includes information / parameters for monitoring the PDCCH that schedules the PDSCH carrying system information block 1 (SIB1) and is transmitted by the base station (BS) via the PBCH of the SSB. For example, the UE can check whether there is a control resource set (CORESET) for the Type0-PDCCH common search space based on the MIB. The Type0-PDCCH common search space is a PDCCH search space and is used to transmit the PDCCH for scheduling SI messages. If a Type0-PDCCH common search space exists, the UE can determine (i) a plurality of consecutive resource blocks and one or more consecutive symbols forming the CORESET, and (ii) the PDCCH timing (e.g., the time domain position for PDCCH reception) based on the information within the MIB (e.g., pdcch-ConfigSIB1). If there is no Type0-PDCCH common search space, pdcch-ConfigSIB1 provides information on the frequency position where the SSB / SIB1 exists and the frequency range where the SSB / SIB1 does not exist.

[0064] -SIB1 contains information about the availability and scheduling (e.g., transmission period, SI window size) of the remaining SIBs (hereinafter referred to as SIBx, where x is an integer of 2 or greater). For example, SIB1 can inform whether SIBx is broadcast periodically or whether SIBx is provided by the UE's request according to an on-demand scheme. If SIBx is provided by an on-demand scheme, SIB1 may include information that the UE needs to perform an SI request. SIB1 is transmitted via PDSCH, the PDCCH for scheduling SIB1 is transmitted via the Type0-PDCCH common search space, and SIB1 is transmitted via the PDSCH indicated by the PDCCH.

[0065] -SIBx is included in the SI message and transmitted via the PDSCH. Each SI message is transmitted within a periodically occurring time window (ie, SI window).

[0066] Channel measurement and rate matching

[0067] Up to L SSBs can be sent in an SSB burst set, and the number / position of SSBs actually sent may vary depending on the BS / cell. The number / position of SSBs actually sent is used for rate matching and measurement, and information about the SSBs actually sent is provided to the UE.

[0068] Technical terms used in this disclosure

[0069] -UE: User Equipment

[0070] -SSB: Synchronization Signal Block

[0071] -MIB: Master Information Block

[0072] -RMSI: Remaining Minimum System Information

[0073] - FR1: Frequency Range 1. It refers to the frequency domain less than or equal to 6 GHz (for example, 450 MHz to 6000 MHz).

[0074] - FR2: Frequency Range 2. It refers to the millimeter wave (mmWave) domain greater than or equal to 24 GHz (e.g., 24250 MHz to 52600 MHz).

[0075] -BW: bandwidth

[0076] -BWP: Bandwidth part

[0077] -RNTI: Radio Network Temporary Identifier

[0078] -CRC: Cyclic Redundancy Check

[0079] -SIB: System Information Block

[0080] -SIB1: SIB1 of NR device = RMSI (Remaining Minimum System Information). It broadcasts information required for NR UE to access the cell, etc.

[0081] - CORESET (Control Resource Set): Time / frequency resources where the NR UE attempts candidate PDCCH decoding

[0082] -CORESET#0: CORESET of Type0-PDCCH CSS set for NR devices (configured in MIB)

[0083] -Type0-PDCCH CSS set: The search space set for the NR UE to monitor the PDCCH candidate set of the DCI format with CRC scrambled by SI-RNTI

[0084] -MO: PDCCH monitoring opportunity of Type0-PDCCH CSS set

[0085] -SIB1-R: (Additional) SIB1 for NR devices with reduced capabilities. It may be restricted when it is generated in a TB separate from SIB1 and sent on a separate PDSCH.

[0086] -CORESET#0-R: CORESET#0 for NR device with reduced capability

[0087] -Type0-PDCCH-R CSS set: redcap UE monitors the search space set of PDCCH candidates with DCI format of CRC scrambled by SI-RNTI

[0088] -MO-R: PDCCH monitoring opportunity for Type0-PDCCH CSS set

[0089] -Cell Definition SSB (CD-SSB): The SSB in the NR SSB that includes RMSI scheduling information

[0090] - Non-cell-defined SSB (non-CD-SSB): It refers to an SSB that has been deployed on the NR synchronization grid but does not include the RMSI scheduling information of the corresponding cell for measurement. However, the SSB may include information notifying the location of the cell-defined SSB.

[0091] -SCS: Subcarrier Spacing

[0092] -SI-RNTI: System Information Radio Network Temporary Identifier

[0093] - Camp on: "Camp on" is a UE state in which the UE stays on a cell and is ready to initiate potential dedicated services or receive ongoing broadcast services.

[0094] -TB: Transport Block

[0095] -RSA (Redcap Standalone): A cell that supports only Redcap devices or services.

[0096] -SIB1(-R)-PDSCH: Sends PDSCH for SIB1(-R)

[0097] -SIB1(-R)-DCI: DCI that schedules the SIB1(-R)-PDSCH. DCI format 1_0 with a CRC scrambled by the SI-RNTI.

[0098] -SIB1(-R)-PDCCH: PDCCH that transmits SIB1(-R)-DCI

[0099] -FDRA: Frequency Domain Resource Allocation

[0100] -TDRA: Time Domain Resource Allocation

[0101] -RA: Random Access

[0102] -MSGA: Used for preamble and payload transmission of 2-step RA type random access procedure.

[0103] -MSGB: Response to MSGA in the 2-step random access procedure. MSGB can consist of a response for contention resolution, a backoff indication, and a backoff indication.

[0104] -RO-N: RACH timing (RO) for normal UE 4-step RACH and 2-step RACH (if configured)

[0105] -RO-N1, RO-N2: If a separate RO for normal UE 2-step RACH is configured, it is distinguished as RO-N1 (4 steps) and RO-N2 (2 steps)

[0106] -RO-R: RACH timing (RO) for redcap UE 4-step RACH and 2-step RACH (if configured) configured separately from RO-N

[0107] -RO-R1, RO-R2: If separate RO for redcap UE 2-step RACH is configured, it is distinguished as RO-R1 (4 steps) and RO-R2 (2 steps)

[0108] -PG-R: MsgA-Preamble Group for RedCap UE

[0109] -RAR: Random Access Response

[0110] -RAR window: time window for monitoring RA response

[0111] -FH: Frequency Hopping

[0112] -iBWP: Initial BWP

[0113] -iBWP-DL(-UL): Initial DL(UL) BWP

[0114] -iBWP-DL(-UL)-R: (Individual) initial DL(UL) BWP for RedCap

[0115] -CS: cyclic shift

[0116] -NB: Narrow Band

[0117] -TO: Traffic diversion

[0118] -mMTC; massive machine type communications

[0119] -eMBB: Enhanced Mobile Broadband Communications

[0120] -URLLC: Ultra-Reliable Low Latency Communication

[0121] -RedCap: Reduced capability

[0122] -eRedCap: Enhanced RedCap

[0123] -FDD: Frequency Division Duplex

[0124] -HD-FDD: Half-duplex FDD

[0125] -DRX: Discontinuous Reception

[0126] -RRC: Radio Resource Control

[0127] -RRM: Radio Resource Management

[0128] -IWSN: Industrial Wireless Sensor Network

[0129] -LPWA: Low Power Wide Area

[0130] -RB: Resource Block

[0131] -CCE: Control Channel Element

[0132] -AL: aggregation level

[0133] -PRG: Physical Resource Block Group

[0134] -DFT-s-OFDM: DFT spread spectrum OFDM

[0135] -PBCH: Physical Broadcast Channel

[0136] -A-PBCH: Additional PBCH

[0137] -BD: Blind Detection

[0138] -EPRE: Energy per RE

[0139] -SNR: Signal-to-Noise Ratio

[0140] -TDM: Time Division Multiplexing

[0141] -DMRS: Demodulation Reference Signal

[0142] -TDD: Time Division Duplex

[0143] -PCI: Physical layer cell ID

[0144] The proposed method of the present disclosure

[0145] In the present disclosure, “()” may be interpreted both when excluding the contents in the brackets and when including the contents in the brackets.

[0146] In the present disclosure, “ / ” may be interpreted as including all contents separated by “ / ” (and), or as including only a part of the separated contents.

[0147] Compared to previous generation wireless communication systems (e.g., LTE, GSM), 5G wireless communication systems are characterized by effectively supporting use cases such as mMTC, eMBB, and URLLC. Due to these advantages, 5G wireless communication systems are expected to create new use cases and gradually replace previous generation wireless communication systems for various use cases. Features of 5G wireless communication systems, such as enhanced low latency, high reliability, and large-scale connectivity, can be applied to use cases previously supported in narrowband (NB) (hereinafter, NB use cases), as follows.

[0148] [Example of narrowband-based use case (NB use case)]

[0149] 1) Railway mobile communications

[0150] 2) Utilities / Infrastructure Networks

[0151] 3) Mobile communications for public safety

[0152] These NB use cases have previously been supported using previous generation wireless communication systems in frequency bands less than 1 GHz with bandwidths of approximately 3 MHz. In the same way, when 5G wireless communication systems are designed to support NB use cases, for example, NB use cases can be supported in the same frequency band (below 1 GHz) with similar frequency bandwidths (approximately 3 MHz and below 5 MHz). However, since the minimum channel bandwidth supported by the current 5G NR standard is 5 MHz, channel bandwidths less than 5 MHz should be supported first.

[0153] [Example of 5G NR frequency bands used to support NB use cases (3GPP TS38.101-1)]

[0154] Table 2 below corresponds to Table 5.2-1: NR operating bands in FR1 of 3GPP TS 38.101-1.

[0155] [Table 2]

[0156]

[0157] [Example of definition of channel BW less than 5 MHz to support NB use case]

[0158] Table 3 shows the maximum number of configurable RBs (N) for each UE channel BW. RB Specifically, to support NB use cases based on 5G NR, Table 3 shows the definition of 3MHz UE channel BW and the maximum number of configurable RBs (N) for 3MHz UE channel BW.RB ) ) is 15 and represents an example of resource utilization (or RU) (%). Table 3 shows an example of supporting UE channel BW less than 5 MHz to support NB use cases.

[0159] [Table 3]

[0160]

[0161] For the newly defined 3MHz UE channel BW, considering the interference between consecutive channels and resource utilization, N RB Another value of , as shown in Table 4 or Table 5. Tables 4 and 5 show examples of supporting UE channel BW less than 5 MHz to support NB use cases.

[0162] [Table 4]

[0163]

[0164] [Table 5]

[0165]

[0166] UE channel BW / N RB The same value may be applied for both DL and UL, or UE channel BW / N may be supported separately for DL and UL RB In the latter case, it may be desirable to support N in both DL and UL, for example, considering interference between consecutive channels and resource utilization. RB The DFT precoding applicable value is additionally applied only to the UL while the maximum value of

[0167] Figure 4 An example of an initial access process in a system applicable to the present disclosure is shown. More specifically, Figure 4 An example of a DL signal / channel reception order in an initial access procedure is shown.

[0168] 5G NR UE can use Figure 4 DL signals / channels are received in the order of

[0169] The initial access procedure is described in detail above. Existing NR UEs can receive CORESET#0 information via the MIB transmitted on the PBCH and receive the initial DL signal / channel via the CORESET#0 frequency band during the initial access procedure. However, when the NR UE operates in a narrowband, the existing method may be inefficient considering the channel BW shown in Tables 3, 4, and 5 and the supportable CORESET#0 bandwidth in the NR standard.

[0170] The present disclosure proposes the following method for supporting transmission / reception of DL signals / channels in a narrowband.

[0171] In this disclosure, narrowband and NB can be interpreted / applied interchangeably. RB and maximum transmit BW can be interpreted / applied interchangeably.

[0172] In the present disclosure, broadcast signaling includes system information including SIB1, MIB, a PBCH payload generated in a PHY layer in addition to the MIB, and a signaling method using a PBCH scrambling sequence and PBCH DMRS sequence initialization information.

[0173] PDCCH reception method

[0174] In order to receive SIB1-PDCCH in narrowband, the UE can receive information for CORESET#0 and Type0-PDCCH CSS set through the MIB sent on the PBCH. Since the CORESET#0 bandwidth supported in the current NR standard is 24 PRBs (4.32MHz) based on 15kHz SCS, it may exceed the narrowband channel BW shown in Tables 3 to 5. In this case, the base station can RE-map the PDCCH transmission RE to CORESET#0 and then only send the RE that falls within the channel BW. That is, the base station can puncture the PDCCH transmission RE that exceeds the channel BW and send the remaining RE.

[0175] The UE can assume the above-mentioned BS operation (i.e., puncturing operation) and receive PDCCH transmission REs within the channel BW. That is, according to the NR standard, the UE can assume that not all PDCCH transmission REs mapped to the CORESET#0 bandwidth but only some PDCCH transmission REs falling within the channel BW are transmitted and can receive them. Therefore, loss of PDCCH reception coverage may occur.

[0176] To recover from the loss of PDCCH reception coverage or to expand PDCCH reception coverage, the base station may apply a power boost to the PDCCH sent to CORESET#0. Whether to apply the power boost to the PDCCH sent to CORESET#0 may be determined, or the power boost value may be set differently based on the CORESET#0 BW or the channel BW or the relationship between the two. The power boost value may be predefined in the standard (per CORESET#0 BW) or may be broadcast signaled.

[0177] According to the existing NR standard TS38.213, as follows, when the UE monitors the PDCCH of DCI format 1_0 with CRC scrambled by SI-RNTI, P-RNTI, RA-RNTI, etc. through CORESET#0, the ratio of PDCCH DMRS EPRE to SSS EPRE is configured to have a value between -8dB and 8dB. If the PDCCH is power-boosted and transmitted, the value of the power boost can be limited so that the PDCCH DMRS EPRE meets the above conditions when power boosting has been performed. Alternatively, if power boosting is applied / configured, the ratio of PDCCH DMRS EPRE to SSS EPRE can be specified to have a value between (-8 + power boost value) dB and (8 + power boost value) dB.

[0178] [Part of NR standard 3GPP TS38.213]

[0179] …if dedicated higher layer parameters have not been provided to the UE, then when the UE monitors the PDCCH for DCI format 1_0 with a CRC scrambled by SI-RNTI, P-RNTI, or RA-RNTI, or for DCI format 2_7, the UE may assume that the ratio of PDCCH DMRS EPRE to SSS EPRE is within -8 dB and 8 dB…

[0180] Alternatively, a new CORESET#0 configuration can be added for narrowband transmission. For example, even if the bandwidth of the CORESET#0 added / introduced for narrowband transmission is smaller or larger than the channel BW, the bandwidth of CORESET#0 can be smaller than the existing CORESET#0 bandwidth. For example, the following CORESET#0 configuration can be added.

[0181] (1) CORESET#0 size = 12 PRBs

[0182] (1-1) In this case, 12 REGs per OFDM symbol*2 OFDM symbols=24 REGs=4CCE AL can be supported using 2 OFDM symbols.

[0183] (1-2) Alternatively, 12 REGs per OFDM symbol*3 OFDM symbols=36 REGs=6CCE AL can be supported using 3 OFDM symbols.

[0184] (2) CORESET#0 size = 14 PRBs

[0185] (2-1) In this case, 14 REGs per OFDM symbol*3 OFDM symbols=42 REs=7 CCEs AL can be supported using 3 OFDM symbols.

[0186] (3) CORESET#0 size = 15 PRBs

[0187] (3-1) In this case, 15 REGs per OFDM symbol*3 OFDM symbols=45 REGs=7.5 CCE AL can be supported using 3 OFDM symbols.

[0188] (4) CORESET#0 size = 16 PRBs

[0189] (4-1) In this case, 16 REGs per OFDM symbol*3 OFDM symbols=48 REGs=8CCE AL can be supported using 3 OFDM symbols.

[0190] If the CORESET #0 size is 16 PRBs as described above, when the channel BW is less than 16, the base station can perform PDCCH RE mapping based on the CORESET #0 size = 16 PRBs, and then puncture the portion exceeding the channel BW to transmit the portion. Puncturing can be performed on the highest PRB index or the lowest PRB index of the CORESET #0 frequency band. The above puncturing method can be predefined in the standard or broadcast signaled.

[0191] Initial DL BWP

[0192] like Figure 4 As shown, the UE receives the PBCH and then receives the DL channel / signal through the initial DL BWP. In a narrowband wireless communication system, the initial DL BWP may be determined based on the following method.

[0193] Determine / use CORESET#0BW as initial DL BWP

[0194] According to the existing NR standard, even in a narrowband wireless communication system, the UE can receive DL channels / signals through the CORESET#0 BW until a separate initial DL BWP is configured or during the initial access procedure. Alternatively, the UE can assume the CORESET#0 BW as the initial DL BWP and perform operations in the initial DL BWP until a separate initial DL BWP is configured or during the initial access procedure.

[0195] [Example]

[0196] (1) In order to support a method of determining / using CORESET#0 BW as an initial DL BWP in a narrowband wireless communication system, for example, CORESET#0 with a 12-PRB bandwidth can be supported. In this case, both the CORESET#0 BW and the initial DL BWP BW become 12 PRBs, and CORESET#0 can be configured to support up to 4 CCE AL in 2 OFDM symbols, or CORESET#0 can be configured to newly support / introduce 6 CCE AL in 3 OFDM symbols.

[0197] (2) Alternatively, COREST#0B W can be configured to have the following relationship (2-1).

[0198] (2-1) CORESET#0 BW = Initial DL BWP BW = Channel BW

[0199] (3) For another example, if the channel BW is 15 PRBs, the CORESET#0 BW can be set to 15 PRBs in the same manner, and CORESET#0 can be configured to support 4CCE AL for 2 OFDM symbols, or 7CCE AL for 3 OFDM symbols, or 10CCE AL for 4 OFDM symbols. Considering the initial DL BWP, this method can aim to use the CORESET#0 BW as widely as possible.

[0200] [SIB1 transmission method]

[0201] In this case, SIB1 PDSCH may be scheduled within the initial DL BWP (ie, CORESET#0 BW).

[0202] [Initial DL BWP configuration method]

[0203] The initial DL BWP is determined by the CORESET#0 related configuration. CORESET#0 related configuration parameters can be set through the MIB sent on the PBCH. For example, as specified in the NR standard TS38.213, the BW and number of OFDM symbols of CORESET#0 can be set by controlResourceSetZero in pdcch-ConfigSIB1 included in the MIB.

[0204] Method for determining / configuring initial DL BWP separately / independently from CORESET#0BW

[0205] Alternatively, for a narrowband wireless communication system, a separate initial DL BWP may be determined / configured separately / independently from CORESET#0. The BW of the initial DL BWP configured separately / independently from CORESET#0 BW may be determined / configured to have the following relationship with CORESET#0 BW.

[0206] [Method #1] Configure the BW of the initial DL BWP to be larger than the BW of CORESET#0

[0207] The BW of the initial DL BWP can be configured to be larger than the CORESET#0 BW. In this case, the initial DL BWP can be configured to include the CORESET#0 band. For example, in narrowband, if the channel BW is 14 PRBs or is set as such, the CORESET#0 BW can be set to 12 PRBs so that the CORESET#0 BW falls within the channel BW, and the initial DL BWP can be set to 14 PRBs in the same manner as the channel BW.

[0208] In method #1, the DL channels / signals transmitted on the initial DL BWP including the SIB1 PDSCH can be scheduled within the initial DL BWP, so the FDRA field of the DCI that schedules the PDSCH transmitted on the initial DL BWP can be determined based on the BW of the initial DL BWP (14 PRBs in the above example). That is, the FDRA field defined in the NR standard TS38.212 It can be the BW of the initial DL BWP instead of the CORESET#0 size. Alternatively, if the entire channel BW is used as the initial DL BWP, then It can be the channel BW.

[0209] [Method #2] Configure the BW of the initial DL BWP to be smaller than the BW of CORESET#0

[0210] The BW of the initial DL BWP can be configured to be smaller than the CORESET#0 BW. In this case, the initial DL BWP can be configured to include a portion of the CORESET#0 frequency band. For example, in narrowband, if the channel BW is 12 PRBs, or is set like this, the CORESET#0 BW can be set to 24 PRBs, and the initial DL BWP can be determined / configured to be the lowest or highest 12 PRBs of CORESET#0.

[0211] This method can be used to support the reuse of CORESET#0 supported in the existing NR standard in a narrowband wireless communication system.

[0212] In method #2, the DL channels / signals transmitted on the initial DL BWP including the SIB1 PDSCH can be scheduled within the initial DL BWP, so the FDRA field of the DCI that schedules the PDSCH transmitted on the initial DL BWP can be determined based on the BW of the initial DL BWP (12 PRBs in the above example). That is, the FDRA field defined in the NR standard TS38.212 It can be the BW of the initial DL BWP instead of the CORESET#0 size. Alternatively, if the entire channel BW is used as the initial DL BWP, then It can be the channel BW.

[0213] Alternatively, in method #2, DL channels / signals transmitted on the initial DL BWP including the SIB1 PDSCH may be scheduled within the CORESET #0 BW. In this case, the FDRA field of the DCI scheduling the PDSCH transmitted on the initial DL BWP may be determined based on the CORESET #0 BW (24 PRBs in the above example) as specified in the existing NR standard.

[0214] [Method #3] Configure the BW of the initial DL BWP to the same method as the CORESET#0 BW

[0215] The BW of the initial DL BWP can be configured to be the same as the BW of CORESET#0. This method is the same as the method described above for determining / using the BW of CORESET#0 as the initial DL BWP. In method #3, separate signaling for the initial DL BWP may not be required. Alternatively, if there is no separate signaling, it can be assumed that the initial DL BWP = CORESET#0 BW.

[0216] [Method #4] Method for configuring the initial DL BWP to include part of CORESET #0

[0217] The initial DL BWP can be configured to include a portion of the CORESET#0 BW. For example, if the SSB and CORESET#0 cannot both be received within the channel BW or simultaneously, the base station can configure all SSBs or only the PSS / SSS among the SSBs to be included in the channel BW, and configure only a portion of CORESET#0 to be included in the channel BW, regardless of the size of CORESET#0. In this case, if the initial DL BWP is configured to be included in the channel BW, the configuration described in method #4 can be expected. Method #4 can be used for the purpose of reusing the CORESET#0 configuration supported in the existing NR standard. In this case, because the base station / UE may not be able to transmit / receive all PDCCHs, loss of PDCCH reception coverage may occur.

[0218] Method #4 may include defining the initial DL BWP as the maximum transmit BW. In this case, the UE may assume the maximum transmit BW as the initial DL BWP during the initial access process. This definition / assumption may apply only in narrowband or only when the CORESET#0 BW exceeds the channel BW in narrowband.

[0219] Method #4 may also include defining the initial DL BWP as the PBCH BW. In this case, the UE may assume the PBCH BW as the initial DL BWP during the initial access process. This definition / assumption may apply only in narrowband or only when the CORESET#0 BW exceeds the channel BW in narrowband. If the maximum transmission BW is less than the PBCH BW, the UE may transmit only a subset of PBCH transmission RBs within the maximum transmission BW. In this case, the PBCH BW assumed by the UE as the initial DL BWP may be the PBCH BW "used for actual PBCH transmission." That is, if a subset of PBCH transmission RBs is punctured and transmitted, the UE may assume the PBCH BW "used for actual PBCH transmission after puncturing," or the "punctured" PBCH BW, in the same sense as the initial DL BWP. This may be to mitigate UE complexity issues or impacts on reception coverage that may occur due to puncturing, partial reception, etc. within the UE's assumed initial DL BWP.

[0220] Figure 5 An example of an initial DL BWP suitable for use in the system of the present disclosure is shown.

[0221] Figure 5 An example is shown where, assuming channel BW=16 PRBs and CORESET#0 BW=24 PRBs, the base station / UE defines / assumes the initial DLBWP to be the (punctured) PBCH BW. Figure 5An example of the initial DL BWP proposed in Method #4 is shown.

[0222] Figure 6 An example of an initial DL BWP suitable for use in the system of the present disclosure is shown.

[0223] When CORESET#0BW is too smaller than the channel BW, for example, when the channel BW has been set to 16 RBs but CORESET#0BW is 12 RBs, or a portion of CORESET#0BW is included in the channel BW and the CORESET#0BW included in the channel BW is less than a specific value (for example, 12 or less RBs), method #4 can be applied to ensure DL transmission resources through the initial DL BWP. Figure 6 An example is shown where, assuming channel BW=16 PRBs and CORESET#0 BW=12 PRBs, the base station / UE defines / assumes the initial DL BWP to be the (punctured) PBCH BW.

[0224] [Method of configuring initial DL BWP individually / independently]

[0225] If the initial DL BWP is configured separately / independently from CORESET#0 BW, the initial DL BWP may be configured through broadcast signaling.

[0226] Alternatively, the frequency position of the initial DL BWP can be determined as a relative frequency position relative to the value / offset value based on the frequency position of the SSB / PSS / SSS / CORESET#0, and this value can be predefined or broadcast in the NR standard. The bandwidth of the initial DL BWP can be predefined or broadcast in the NR standard. Alternatively, the bandwidth of the initial DL BWP can be predefined in the NR standard to have the same value as the channel BW. Alternatively, if there is no separate signaling in the broadcast signaling step, the base station / UE can assume that the BW of the initial DL BWP is the same as the channel BW. When the entire narrowband is used as the initial DL BWP, this determination / configuration method can be expected to have the effect of minimizing signaling overhead.

[0227] [Description of claims related to UE]

[0228] Below, reference Figure 7 The above embodiments are described in detail from the perspective of UE operation. The methods described below are distinguished only for the sake of convenience of explanation. Therefore, as long as the methods are not mutually exclusive, it is obvious that part of the configuration of any method can be replaced or combined with part of the configuration of another method.

[0229] Figure 7 An example of an operation process of a UE in the system applicable to the present disclosure is shown.

[0230] In step S710 , the UE receives a master information block (MIB) including configuration information on the total number of consecutive resource blocks for a control resource set (CORESET) #0 from a base station (BS).

[0231] In step S720, the UE receives a physical downlink control channel (PDCCH) related to system information block 1 (SIB1) from the base station through CORESET #0 including a second resource block excluding a first resource block from the resource block based on i) the total number of resource blocks and ii) the channel bandwidth. It is assumed that a specific number of first resource blocks among the resource blocks are punctured.

[0232] In step S730 , the UE receives a physical downlink shared channel (PDSCH) related to SIB1 from the base station via an initial downlink (DL) bandwidth part (BWP) based on the PDCCH.

[0233] Based on the puncturing of the first resource blocks, the initial DL BWP is defined by the number of second resource blocks forming CORESET#0 and the positions of the second resource blocks.

[0234] According to various embodiments of the present disclosure, if a bandwidth based on the number of resource blocks exceeds a channel bandwidth, a PDCCH may be received through a second resource block associated with a bandwidth smaller than the channel bandwidth.

[0235] According to various embodiments of the present disclosure, the first resource blocks may be a specific number of resource blocks having the highest resource block index among the resource blocks.

[0236] According to various embodiments of the present disclosure, the total number of resource blocks may be 24, and the channel bandwidth may be 3 MHz or 5 MHz.

[0237] According to various embodiments of the present disclosure, if the total number of resource blocks is 24 and the channel bandwidth is 3 MHz, the number of second resource blocks may be 15.

[0238] According to various embodiments of the present disclosure, the initial DL BWP may be defined by the positions and number of consecutive resource blocks starting from the resource block with the lowest index among the second resource blocks forming CORESET#0 and ending with the resource block with the highest index among the second resource blocks.

[0239] According to various embodiments of the present disclosure, CORESET#0 may be associated with a Type0-PDCCH common search space (CSS) set.

[0240] According to various embodiments of the present disclosure, a user equipment (UE) in a wireless communication system is provided. The UE may include a transceiver and at least one processor, and the at least one processor may be configured to execute a Figure 7 UE operating method.

[0241] According to various embodiments of the present disclosure, a device for controlling a user equipment (UE) in a wireless communication system is provided. The device may include at least one processor and at least one memory operatively connected to the at least one processor. The at least one memory may be configured to store a program executed by the at least one processor based on the program executed by the at least one processor. Figure 7 Instructions on the operation method of the UE.

[0242] According to various embodiments of the present disclosure, one or more non-transitory computer readable media (CRMs) storing one or more instructions are provided. The one or more instructions may be configured to perform operations based on execution by one or more processors, and the operations may include performing operations based on Figure 7 UE operating method.

[0243] [Explanation of claims related to BS]

[0244] Below, reference Figure 8 The above embodiments are described in detail from the perspective of base station operation. The methods described below are differentiated only for ease of explanation. Therefore, it is obvious that as long as the methods are not mutually exclusive, part of the configuration of any method can be replaced or combined with part of the configuration of another method.

[0245] Figure 8 An example of an operation process of a base station in the system applicable to the present disclosure is shown.

[0246] In step S810 , the base station transmits a master information block (MIB) to the UE, where the MIB includes configuration information related to the total number of consecutive resource blocks for control resource set (CORESET) #0.

[0247] In step S820, the base station transmits a physical downlink control channel (PDCCH) related to system information block 1 (SIB1) to the UE through CORESET #0 including a second resource block excluding the first resource block from the resource block based on i) the total number of resource blocks and ii) the channel bandwidth. Puncturing is performed on a specific number of the first resource blocks among the resource blocks.

[0248] In step S830, the base station transmits a physical downlink shared channel (PDSCH) related to SIB1 to the UE via an initial downlink (DL) bandwidth part (BWP) based on the PDCCH. The initial DL BWP is defined by the number of second resource blocks forming CORESET#0 and the positions of the second resource blocks based on the puncturing of the first resource blocks.

[0249] According to various embodiments of the present disclosure, if a bandwidth based on the number of resource blocks exceeds a channel bandwidth, a PDCCH may be transmitted through a second resource block associated with a bandwidth smaller than the channel bandwidth.

[0250] According to various embodiments of the present disclosure, the first resource blocks may be a specific number of resource blocks having the highest resource block index among the resource blocks.

[0251] According to various embodiments of the present disclosure, the total number of resource blocks may be 24, and the channel bandwidth may be 3 MHz or 5 MHz.

[0252] According to various embodiments of the present disclosure, if the total number of resource blocks is 24 and the channel bandwidth is 3 MHz, the number of second resource blocks may be 15.

[0253] According to various embodiments of the present disclosure, the initial DL BWP may be defined by the positions and number of consecutive resource blocks starting from the resource block with the lowest index among the second resource blocks forming CORESET#0 and ending with the resource block with the highest index among the second resource blocks.

[0254] According to various embodiments of the present disclosure, CORESET#0 may be associated with a Type0-PDCCH common search space (CSS) set.

[0255] According to various embodiments of the present disclosure, a base station in a wireless communication system is provided. The base station may include a transceiver and at least one processor, and the at least one processor may be configured to execute a Figure 8 The operation method of BS.

[0256] According to various embodiments of the present disclosure, an apparatus for controlling a base station in a wireless communication system is provided. The apparatus may include at least one processor and at least one memory operatively connected to the at least one processor. The at least one memory may be configured to store commands executed by the at least one processor based on the commands executed by the at least one processor. Figure 8 Instructions on the operating methods of the BS.

[0257] According to various embodiments of the present disclosure, one or more non-transitory computer readable media (CRMs) storing one or more instructions are provided. The one or more instructions may be configured to perform operations based on execution by one or more processors, and the operations may include performing operations based on Figure 8 The operation method of BS.

[0258] Wireless devices suitable for the present disclosure

[0259] An example of a wireless device to which various embodiments of the present disclosure are applied is described below.

[0260] Figure 9 An example of the structure of the first device and the second device applicable to the system of the present disclosure is shown.

[0261] The first device 1600 may include a processor 1610 , an antenna unit 1620 , a transceiver 1630 , and a memory 1640 .

[0262] The processor 1610 can perform signal processing related to the baseband and includes a high-level processing unit 1611 and a physical layer processing unit 1615. The high-level processing unit 1611 can process the operation of the MAC layer, the RRC layer, or the high-level layer. The physical layer processing unit 1615 can process the operation of the PHY layer. For example, if the first device 1600 is a base station (BS) device in BS-UE communication, the physical layer processing unit 1615 can perform uplink receive (Rx) signal processing, downlink transmit (Tx) signal processing, etc. For example, if the first device 1600 is a first UE device in inter-UE communication, the physical layer processing unit 1615 can perform downlink Rx signal processing, uplink Tx signal processing, sidelink Tx signal processing, etc. In addition to performing baseband-related signal processing, the processor 1610 can also control the overall operation of the first device 1600.

[0263] The antenna unit 1620 may include one or more physical antennas, and if the antenna unit 1620 includes multiple antennas, MIMO transmission / reception is supported. The transceiver 1630 may include a radio frequency (RF) transmitter and an RF receiver. The memory 1640 may store information processed by the processor 1610 and software, an operating system, and applications related to the operation of the first device 1600. The memory 1640 may also include components such as a buffer.

[0264] In the embodiments described in the present disclosure, the processor 1610 of the first apparatus 1600 may be configured to implement operations of a BS in BS-UE communication (or operations of a first UE device in inter-UE communication).

[0265] The second device 1650 may include a processor 1660 , an antenna unit 1670 , a transceiver 1680 , and a memory 1690 .

[0266] The processor 1660 can perform baseband-related signal processing and includes a high-level processing unit 1661 and a physical layer processing unit 1665. The high-level processing unit 1661 can process operations of the MAC layer, the RRC layer, or a high-level layer. The physical layer processing unit 1665 can process operations of the PHY layer. For example, if the second device 1650 is a UE device in BS-UE communication, the physical layer processing unit 1665 can perform downlink receive (Rx) signal processing, uplink Tx signal processing, etc. For example, if the second device 1650 is a second UE device in inter-UE communication, the physical layer processing unit 1665 can perform downlink Rx signal processing, uplink Tx signal processing, sidelink Rx signal processing, etc. In addition to performing baseband-related signal processing, the processor 1660 can also control the overall operation of the second device 1660.

[0267] The antenna unit 1670 may include one or more physical antennas, and if the antenna unit 1670 includes multiple antennas, MIMO transmission / reception is supported. The transceiver 1680 may include an RF transmitter and an RF receiver. The memory 1690 may store information processed by the processor 1660 and software, an operating system, and applications related to the operation of the second device 1650. The memory 1690 may also include components such as a buffer.

[0268] In the embodiments described in the present disclosure, the processor 1660 of the second device 1650 may be configured to implement the operation of the UE in BS-UE communication (or the operation of the second UE device in inter-UE communication).

[0269] The description of the BS and the UE in BS-UE communication (or the first UE device and the second UE device in inter-UE communication) in the examples of the present disclosure can be equally applied to the operations of the first device 1600 and the second device 1650, and redundant description is omitted.

[0270] In addition to LTE, NR, and 6G, the wireless communication technology implemented in the apparatuses 1600 and 1650 according to the present disclosure may also include narrowband Internet of Things (NB-IoT) for low-power communication. For example, NB-IoT technology may be an example of a low-power wide area network (LPWAN) technology and may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2. NB-IoT technology is not limited to the above names.

[0271] Additionally or alternatively, the wireless communication technology implemented in the apparatuses 1600 and 1650 according to the present disclosure may perform communication based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names, such as enhanced machine type communication (eMTC). For example, LTE-M technology may be implemented using at least one of various standards, such as: 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE machine type communication, and / or 7) LTE M. LTE-M technology is not limited to the aforementioned names.

[0272] Additionally or alternatively, considering low-power communication, the wireless communication technology implemented in the devices 1600 and 1650 according to the present disclosure may include at least one of ZigBee, Bluetooth, and a low-power wide area network (LPWAN), and is not limited to the above names. For example, ZigBee technology can create a personal area network (PAN) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.

[0273] The claims described in the various embodiments of the present disclosure may be combined in various ways. For example, the technical features of the method claims of the various embodiments of the present disclosure may be combined and implemented as a device, and the technical features of the device claims of the various embodiments of the present disclosure may be combined and implemented as a method. In addition, the technical features of the method claims and the technical features of the device claims in the various embodiments of the present disclosure may be combined and implemented as a device, and the technical features of the method claims and the technical features of the device claims in the various embodiments of the present disclosure may be combined and implemented as a method.

Claims

1. A method for operating a user equipment (UE) in a wireless communication system, the method comprising the following steps: receiving a master information block MIB from a base station BS, the MIB comprising configuration information related to a total number of consecutive resource blocks for a control resource set CORESET#0; receiving, from the base station, a physical downlink control channel (PDCCH) associated with system information block 1 (SIB1) through CORESET #0 including a second resource block excluding a first resource block from the resource blocks based on i) the total number of the resource blocks and ii) a channel bandwidth, It is assumed that a specific number of first resource blocks among the resource blocks are punctured; and Based on the PDCCH, receiving a physical downlink shared channel PDSCH related to the SIB1 from the base station via an initial downlink DL bandwidth part BWP, Based on the puncturing of the first resource blocks, the initial DL BWP is defined by the number of the second resource blocks forming the CORESET#0 and the positions of the second resource blocks.

2. The method according to claim 1, wherein The PDCCH is received through the second resource blocks associated with a bandwidth smaller than the channel bandwidth, based on the bandwidth according to the number of resource blocks exceeding the channel bandwidth.

3. The method according to claim 1, wherein The first resource blocks are a specific number of resource blocks having the highest resource block index among the resource blocks.

4. The method according to claim 1, wherein The total number of resource blocks is 24, and The channel bandwidth is 3 MHz or 5 MHz.

5. The method according to claim 4, wherein Based on the total number of the resource blocks being 24 and the channel bandwidth being 3 MHz, the number of the second resource blocks is 15.

6. The method according to claim 1, wherein The initial DL BWP is defined by positions and numbers of consecutive resource blocks starting from a resource block with a lowest index among the second resource blocks forming the CORESET#0 and ending with a resource block with a highest index among the second resource blocks.

7. The method according to claim 1, wherein The CORESET#0 is related to the Type0-PDCCH common search space CSS set.

8. A method for operating a base station BS in a wireless communication system, the method comprising the following steps: Sending a master information block (MIB) to a user equipment (UE), the MIB comprising configuration information related to a total number of consecutive resource blocks for a control resource set (CORESET#0); transmitting, to the UE, a physical downlink control channel (PDCCH) associated with system information block 1 (SIB1) through CORESET #0 including a second resource block excluding a first resource block from the resource blocks based on i) the total number of the resource blocks and ii) a channel bandwidth, wherein puncturing of a specific number of first resource blocks among the resource blocks is performed; and Based on the PDCCH, a physical downlink shared channel PDSCH related to the SIB1 is sent to the UE via an initial downlink DL bandwidth part BWP, Based on the puncturing of the first resource blocks, the initial DL BWP is defined by the number of the second resource blocks forming the CORESET#0 and the positions of the second resource blocks.

9. The method according to claim 8, wherein The PDCCH is transmitted through the second resource blocks associated with a bandwidth smaller than the channel bandwidth, based on the bandwidth according to the number of resource blocks exceeding the channel bandwidth.

10. The method according to claim 8, wherein The first resource blocks are the specific number of resource blocks having the highest resource block index among the resource blocks.

11. The method according to claim 8, wherein The total number of resource blocks is 24, and The channel bandwidth is 3 MHz or 5 MHz.

12. The method according to claim 11, wherein Based on the total number of the resource blocks being 24 and the channel bandwidth being 3 MHz, the number of the second resource blocks is 15.

13. The method according to claim 8, wherein The initial DL BWP is defined by positions and numbers of consecutive resource blocks starting from a resource block with a lowest index among the second resource blocks forming the CORESET#0 and ending with a resource block with a highest index among the second resource blocks.

14. The method according to claim 8, wherein The CORESET#0 is related to the Type0-PDCCH common search space CSS set.

15. A user equipment (UE) in a wireless communication system, the UE comprising: transceiver; at least one processor; as well as at least one memory operatively connectable to the at least one processor and configured to store instructions for performing operations upon execution by the at least one processor, The operation includes all steps of the method according to any one of claims 1 to 7.

16. A base station in a wireless communication system, the base station comprising: transceiver; at least one processor; as well as at least one memory operatively connectable to the at least one processor and configured to store instructions for performing operations upon execution by the at least one processor, The operation includes all steps of the method according to any one of claims 8 to 14.

17. A control device for controlling user equipment in a wireless communication system, the control device comprising: at least one processor; as well as at least one memory operatively connected to the at least one processor, wherein the at least one memory is configured to store instructions for performing operations based on execution by the at least one processor, and The operation includes all steps of the method according to any one of claims 1 to 7.

18. A control device for controlling a base station in a wireless communication system, the control device comprising: at least one processor; as well as at least one memory operatively connected to the at least one processor, wherein the at least one memory is configured to store instructions for performing operations based on execution by the at least one processor, and The operation includes all steps of the method according to any one of claims 8 to 14.

19. One or more non-transitory computer-readable media storing one or more instructions, in, The one or more instructions are configured to perform operations upon execution by one or more processors, and The operation includes all steps of the method according to any one of claims 1 to 7.

20. One or more non-transitory computer-readable media storing one or more instructions, in, The one or more instructions are configured to perform operations upon execution by one or more processors, and The operation includes all steps of the method according to any one of claims 8 to 14.

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