Apparatus and method for receiving downlink data in a wireless communication system

Abstract

According to various embodiments of the present disclosure, a method for operating a user equipment (UE) in a wireless communication system includes: receiving, from a base station (BS), a master information block (MIB) including configuration information related to the total number of contiguous resource blocks for a control resource set #0 (CORESET#0); and receiving, from the base station, a physical downlink control channel (PDCCH) associated with a system information block 1 (SIB1) via the CORESET#0 consisting of second resource blocks excluding a first resource block among the resource blocks based on i) the total number of resource blocks and ii) a channel bandwidth; and receiving, from the base station, a physical downlink shared channel (PDSCH) associated with the SIB1 via an initial downlink bandwidth part (initial DLBWP) based on the PDCCH, where puncturing is assumed for a specific number of first resource blocks among the resource blocks, and the initial DL BWP is determined based on the puncturing for the first resource blocks. A method is provided in which the number of second resource blocks constituting #0 and the position of the second resource blocks are defined by the number of second resource blocks constituting #0 and the position of the second resource blocks.

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to wireless communication systems, and more particularly to an apparatus and method for receiving downlink data in a wireless communication system. [Background technology]

[0002] Wireless communication systems have been widely deployed to provide various types of communication services, such as voice and data. Generally, wireless communication systems are multiple access systems that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). Examples of multiple access systems include Code Division Multiple Access (CDMA) systems, Frequency Division Multiple Access (FDMA) systems, Time Division Multiple Access (TDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, and Single Carrier Frequency Division Multiple Access (SC-FDMA) systems. Summary of the Invention [Problem to be solved by the invention]

[0003] To solve the aforementioned problems, the present disclosure provides an apparatus and method for receiving downlink data in a wireless communication system.

[0004] The technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by a person having ordinary skill in the technical field to which the present disclosure pertains from the following description. [Means for solving the problem]

[0005] According to various embodiments of the present disclosure, a method for operating a terminal (user equipment, UE) in a wireless communication system includes the steps of receiving, from a base station (BS), a master information block (MIB) including configuration information related to a total number of contiguous resource blocks for a control resource set #0 (CORESET#0); and receiving, from the base station, a physical downlink control channel (PDCCH) related to a system information block 1 (SIB1) via the CORESET#0 consisting of second resource blocks excluding a first resource block among the resource blocks based on i) the total number of resource blocks and ii) a channel bandwidth, wherein puncturing of a specific number of first resource blocks among the resource blocks is assumed. receiving a physical downlink shared channel (PDSCH) associated with the SIB1 from the base station via an initial downlink bandwidth part (initial downlink BWP) based on the PDCCH, wherein the initial DL BWP based on the puncturing for the first resource blocks is defined by the number of second resource blocks constituting CORESET #0 and positions of the second resource blocks.

[0006] According to various embodiments of the present disclosure, a method for operating a base station (BS) in a wireless communication system includes the steps of: transmitting a master information block (MIB) including configuration information related to a total number of contiguous resource blocks for a control resource set #0 (CORESET#0) to a user equipment (UE); and transmitting a physical downlink control channel (PDCCH) associated with a system information block 1 (SIB1) to the UE via the CORESET#0 consisting of second resource blocks excluding a first resource block among the resource blocks based on i) the total number of resource blocks and ii) a channel bandwidth; and when a specific number of first resource blocks among the resource blocks are punctured, transmitting a physical downlink shared channel (PDSCH) associated with the SIB1 to the UE via an initial downlink bandwidth part (initial downlink BWP) based on the PDCCH, and A method is provided in which the BWP is defined by the number of the second resource blocks constituting the CORESET#0 and the positions of the second resource blocks.

[0007] According to various embodiments of the present disclosure, there is provided a terminal in a wireless communication system, the terminal including a transceiver, at least one processor, and at least one memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations, the operations including (comprising; configuring; constructing; configuring; including; encompassing; containing) all steps of methods of operating a terminal according to various embodiments of the present disclosure.

[0008] According to various embodiments of the present disclosure, there is provided a base station in a wireless communication system, the base station including a transceiver, at least one processor, and at least one memory operably connected to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations, the operations including all steps of a method of operating a base station according to various embodiments of the present disclosure.

[0009] According to various embodiments of the present disclosure, there is provided a control device for controlling a terminal in a wireless communication system, the control device including at least one processor and at least one memory operably connected to the at least one processor, the at least one memory storing instructions for performing operations based on being executed by the at least one processor, the operations including all steps of a method for operating a terminal according to various embodiments of the present disclosure.

[0010] According to various embodiments of the present disclosure, there is provided a control device for controlling a base station in a wireless communication system, the control device including at least one processor and at least one memory operably connected to the at least one processor, the at least one memory storing instructions for performing operations based on being executed by the at least one processor, the operations including all steps of a base station operating method according to various embodiments of the present disclosure.

[0011] According to various embodiments of the present disclosure, one or more non-transitory computer-readable media are provided that store one or more instructions, the one or more instructions being executed by one or more processors to perform operations, the operations including all steps of a method for operating a terminal according to various embodiments of the present disclosure.

[0012] According to various embodiments of the present disclosure, one or more non-transitory computer-readable media are provided that store one or more instructions, the one or more instructions being executed by one or more processors to perform operations, the operations including all steps of a base station operating method according to various embodiments of the present disclosure. [Effects of the Invention]

[0013] To solve the aforementioned problems, the present disclosure can provide an apparatus and method for receiving downlink data in a wireless communication system. [Brief explanation of the drawings]

[0014] The drawings attached below are intended to aid in understanding the present disclosure, and together with the detailed description, can provide embodiments of the present disclosure. However, the technical features of the present disclosure are not limited to specific drawings, and the features disclosed in each drawing can be combined with each other to form new embodiments. Reference numerals in each drawing may refer to structural elements. [Figure 1] FIG. 1 is a diagram showing an example of physical channels used in a system applicable to the present disclosure and a general signal transmission method using the channels. [Figure 2] FIG. 2 is a diagram showing an example of an SSB (synchronization signal block) in a system applicable to the present disclosure. [Figure 3] FIG. 3 is a diagram showing an example of SSB (synchronization signal block) transmission in a system applicable to the present disclosure. [Figure 4] FIG. 4 is a diagram showing an example of an initial connection process in a system applicable to the present disclosure. [Figure 5] FIG. 5 is a diagram illustrating an example of an initialDL BWP in a system applicable to the present disclosure. [Figure 6] FIG. 6 is a diagram illustrating an example of an initialDL BWP in a system applicable to the present disclosure. [Figure 7] FIG. 7 is a diagram illustrating an example of an operation process of a terminal (user equipment, UE) in a system applicable to the present disclosure. [Figure 8] FIG. 8 is a diagram showing an example of an operation process of a base station (BS) in a system applicable to the present disclosure. [Figure 9] FIG. 9 is a diagram illustrating an example of the structure of a first device and a second device in a system applicable to the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0015] In various embodiments of the present disclosure, "A or B" can mean "A only," "B only," or "both A and B." In other words, in various embodiments of the present disclosure, "A or B" can be interpreted as "A and / or B." For example, in various embodiments of the present disclosure, "A, B or C" can mean "A only," "B only," "C only," or "any combination of A, B, and C."

[0016] A slash ( / ) or a comma used in various embodiments of the present disclosure may mean "and / or." For example, "A / B" may mean "A and / or B." Accordingly, "A / B" may mean "A only," "B only," or "both A and B." For example, "A, B, C" may mean "A, B, or C."

[0017] In various embodiments of the present disclosure, "at least one of A and B" can mean "A only," "B only," or "all of A and B." Furthermore, in various embodiments of the present disclosure, the phrases "at least one of A or B" and "at least one of A and / or B" can be interpreted similarly to "at least one of A and B."

[0018] Furthermore, in various embodiments of the present disclosure, "at least one of A, B, and C" can mean "A only," "B only," "C only," or "any combination of A, B, and C." Also, "at least one of A, B, or C" or "at least one of A, B, and / or C" can mean "at least one of A, B, and C."

[0019] Furthermore, parentheses used in various embodiments of the present disclosure may mean "for example." Specifically, when "control information (PDCCH)" is displayed, "PDCCH" may be proposed as an example of "control information." In other words, "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." Furthermore, even when "control information (i.e., PDCCH)" is displayed, "PDCCH" may be proposed as an example of "control information."

[0020] In various embodiments of the present disclosure, technical features described separately in one drawing may be realized separately or simultaneously.

[0021] General signal transmission method in 3GPP (registered trademark: the same applies below) Physical Channels and General Signal Transmission 1 is a diagram illustrating an example of physical channels used in a system applicable to the present disclosure and a general signal transmission method using the physical channels. Specifically, FIG. 1 illustrates physical channels used in a 3GPP system and general signal transmission.

[0022] Figure 1 illustrates physical channels and general signal transmission used in the 3GPP system. In a wireless communication system, a terminal receives information from a base station via a downlink (DL), and transmits information to the base station via an uplink (UL). Information exchanged between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type / use of the information exchanged.

[0023] When a terminal is powered on after being powered off or newly enters a cell, it performs an initial cell search operation, such as synchronizing with a base station (S11). To this end, the terminal receives a Primary Synchronization Channel (PSCH) and a Secondary Synchronization Channel (SSCH) from the base station to synchronize with the base station and acquire information such as a cell identity (ID). The terminal can also receive a Physical Broadcast Channel (PBCH) from the base station to acquire broadcast information within the cell. The terminal can also receive a Downlink Reference Signal (DL RS) during the initial cell search step to check the downlink channel status.

[0024] After completing the initial cell search, the terminal can receive a physical downlink control channel (PDCCH) and a corresponding physical downlink control channel (PDSCH) to acquire more specific system information (S12).

[0025] Thereafter, the terminal may perform a random access procedure to complete connection to the base station (S13 to S16). Specifically, the terminal may transmit a preamble over a physical random access channel (PRACH) (S13) and receive a random access response (RAR) for the preamble over a PDCCH and its corresponding PDSCH (S14). Thereafter, the terminal may transmit a physical uplink shared channel (PUSCH) using scheduling information in the RAR (S15) and perform a contention resolution procedure like the PDCCH and its corresponding PDSCH (S16).

[0026] After performing the above-described procedures, the UE can then perform PDCCH / PDSCH reception (S17) and PUSCH / PUCCH (Physical Uplink Control Channel) transmission (S18) as a general uplink / downlink signal transmission procedure. Control information transmitted by the UE to the base station is referred to as UCI (Uplink Control Information). UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc. CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indication), etc. UCI is usually transmitted via PUCCH, but can be transmitted via PUSCH if control information and data are to be transmitted simultaneously. Furthermore, the UE can aperiodically transmit UCI via PUSCH according to a request / instruction from the network.

[0027] Initial Access (IA) process SSB (Synchronization Signal Block) transmission and related operations FIG. 2 is a diagram showing an example of an SSB (synchronization signal block) in a system applicable to the present disclosure.

[0028] Based on SSB, the UE can perform cell search, system information acquisition, beam alignment for initial connection, DL measurement, etc. SSB is mixed with the SS / PBCH (Synchronization Signal / Physical Broadcast channel) block.

[0029] Referring to FIG. 2, an SSB consists of a PSS, SSS, and PBCH. An SSB consists of four consecutive OFDM symbols, and one of the PSS, PBCH, SSS / PBCH, or PBCH is transmitted per OFDM symbol. The PSS and SSS each consist of one OFDM symbol and 127 subcarriers, and the PBCH consists of three OFDM symbols and 576 subcarriers. The PBCH is encoded / decoded based on a polar code and modulated / demodulated according to Quadrature Phase Shift Keying (QPSK). The PBCH within an OFDM symbol consists of 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 an OFDM symbol, and three data REs exist between the DMRS REs.

[0030] Cell exploration Cell search refers to the process in which a UE acquires time / frequency synchronization of a cell and detects the cell ID (identifier) ​​(e.g., physical layer Cell ID, PCI) of the cell. The PSS is used to detect a cell ID within a cell ID group, and the SSS is used to detect a cell ID group. The PBCH is used for SSB (time) index detection and half-frame detection.

[0031] The UE cell search process can be summarized as shown in Table 1 below.

[0032] [Table 1]

[0033] There are 336 cell ID groups, and each cell ID group has 3 cell IDs. There are a total of 1008 cell IDs. Information about the cell ID group to which the cell ID of a cell belongs is provided / obtained via the SSS of the cell, and information about the cell ID of one of the 336 cells in the cell ID group is provided / obtained via the PSS.

[0034] FIG. 3 is a diagram showing an example of transmission of SSB (synchronization signal block) in a system applicable to the present disclosure.

[0035] SSBs are transmitted periodically according to the SSB periodicity. The basic SSB period assumed by the UE during initial cell search is defined as 20 ms. After cell connection, the SSB period can be set by the network (e.g., BS) to one of {5 ms, 10 ms, 20 ms, 40 ms, 80 ms, 160 ms}. An SSB burst set is configured at the start of the SSB period. The SSB burst set consists of a 5 ms time window (i.e., half frame), and an SSB can be transmitted a maximum of L times within the SSB burst set. The maximum number of SSB transmissions, L, is given as follows depending on the carrier frequency band: One slot contains a maximum of two SSBs.

[0036] - For frequency range up to 3 GHz, L = 4

[0037] - For frequency range from 3GHz to 6 GHz, L = 8

[0038] - For frequency range from 6 GHz to 52.6 GHz, L = 64

[0039] The time positions of the SSB candidates within the SS burst set may be defined according to the subcarrier spacing. The time positions of the SSB candidates are indexed (SSB index) from 0 to L_1 according to the time order within the SSB burst set (i.e., half frame).

[0040] Multiple SSBs can be transmitted within the frequency span of a carrier. The physical layer cell identifiers of such SSBs do not need to be unique; other SSBs can have different physical layer cell identifiers.

[0041] 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, thereby detecting the symbol / slot / half-frame boundary. The frame / half-frame number to which the detected SSB belongs can be identified using system frame number (SFN) information and half-frame indication information.

[0042] Specifically, the UE can acquire a 10-bit SFN for the frame to which the PBCH belongs from the PBCH. Next, the UE can acquire 1-bit half-frame indication information. For example, if the UE detects a PBCH with the half-frame indication bit set to 0, it 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, it can determine that the SSB to which the PBCH belongs belongs to the second half-frame in the frame. Finally, the UE can acquire an SSB index for the SSB to which the PBCH belongs based on the DMRS sequence and the PBCH payload carried by the PBCH.

[0043] Obtaining System Information The SI is divided into a master information block (MIB) and multiple system information blocks (SIBs). System information (SI) other than the MIB can be referred to as Remaining Minimum System Information (RMSI). For more details, please refer to the following.

[0044] The MIB includes information / parameters for monitoring the PDCCH that schedules the PDSCH carrying SIB1 (System Information Block 1), and is transmitted by the BS via the PBCH of the SSB. For example, a UE can confirm the existence of a CORESET (Control Resource Set) for the Type 0 PDCCH common search space based on the MIB. The Type 0-PDCCH common search space is a type of PDCCH search space and is used to transmit the PDCCH that schedules the SI message. If the Type 0-PDCCH common search space exists, the UE can determine (i) multiple contiguous resource blocks and one or more consecutive symbols that constitute the CORESET and (ii) the PDCCH opportunity (e.g., the time domain location for PDCCH reception) based on information in the MIB (e.g., pdcch-ConfigSIB1). If there is no Type0-PDCCH common search space, pdcch-ConfigSIB1 provides information about the frequency location where SSB / SIB1 exists and the frequency range where SSB / SIB1 does not exist.

[0045] SIB1 includes information about the availability and scheduling (e.g., transmission period, SI-window size) of the remaining SIBs (hereinafter, SIBx, where x is an integer equal to or greater than 1). For example, SIB1 may indicate whether SIBx is broadcast periodically or provided at the request of a UE in an on-demand manner. If SIBx is provided in an on-demand manner, SIB1 may include information necessary for the UE to perform an SI request. SIB1 is transmitted over a PDSCH, and a PDCCH scheduling SIB1 is transmitted over a Type 0 PDCCH common search space, and SIB1 is transmitted over a PDSCH indicated by the PDCCH.

[0046] - SIBx are contained in SI messages and transmitted over the PDSCH. Each SI message is transmitted within a periodically occurring time window (i.e., SI-window).

[0047] Channel Measurement and Rate-Matching Within an SSB burst set, up to L SSBs can be transmitted, and the number / location of the SSBs actually transmitted may vary depending on the BS / cell. The number / location of the SSBs actually transmitted is used for rate matching and measurement, and information about the actually transmitted SSBs is provided to the UE.

[0048] Technical terms used in this disclosure

[0049] - UE: User Equipment

[0050] - SSB: Synchronization Signal Block

[0051] - MIB: Master Information Block

[0052] - RMSI: Remaining Minimum System Information

[0053] FR1: Frequency Range 1. Refers to the frequency range below 6GHz (e.g., 450MHz to 6000MHz).

[0054] - FR2: Frequency Range 2. Refers to the millimeter wave (mmWave) range above 24 GHz (e.g., 24,250 MHz to 52,600 MHz).

[0055] - BW: Bandwidth

[0056] - BWP: Bandwidth Part

[0057] - RNTI: Radio Network Temporary Identifier

[0058] - CRC: Cyclic Redundancy Check

[0059] - SIB: System Information Block

[0060] - SIB1: SIB1 for NR devices = RMSI (Remaining Minimum System Information). Broadcasts information necessary for NR terminal cell connection.

[0061] - CORESET (CONTROLL REsource SET): The time / frequency resource on which the NR terminal attempts candidate PDCCH decoding.

[0062] - CORESET♯0: CORESET for Type0-PDCCH CSS set for NR devices (configured in MIB)

[0063] - Type0-PDCCH CSS set: a search space set in which an NR UE monitors a set of PDCCH candidates for a DCI format with CRC scrambled by a SI-RNTI

[0064] - MO: PDCCH Monitoring Occasion for Type0-PDCCH CSS set

[0065] - SIB1-R: (additional) SIB1 for reduced capability NR devices. This may be limited to cases where it is generated in a different TB from SIB1 and transmitted on a separate PDSCH.

[0066] - CORESET♯0-R: CORESET♯0 for reduced capability NR devices

[0067] - Type0-PDCCH-R CSS set: a search space set in which an redcap UE monitors a set of PDCCH candidates for a DCI format with CRC scrambled by a SI-RNTI

[0068] - MO-R: PDCCH Monitoring Occasion for Type0-PDCCH CSS set

[0069] - Cell-defining SSB (CD-SSB): NR SSB that includes RMSI scheduling information

[0070] - Non-cell defining SSB (non-CD-SSB): An SSB that is located in the NR sync raster but does not contain RMSI scheduling information for the corresponding cell for measurement purposes. However, it may contain information indicating the location of the cell defining SSB.

[0071] - SCS: subcarrier spacing

[0072] - SI-RNTI: System Information Radio-Network Temporary Identifier

[0073] - Camp on: “Camp on” is the UE state in which the UE stays on a cell and is ready to initiate a potential dedicated service or to receive an ongoing broadcast service.

[0074] - TB: Transport Block

[0075] - RSA (Redcap standalone): A cell that only supports Redcap device or service.

[0076] - SIB1(-R)-PDSCH: PDSCH carrying SIB1(-R)

[0077] - SIB1(-R)-DCI: DCI for scheduling SIB1(-R)-PDSCH. DCI format 1_0 with CRC scrambled by SI-RNTI.

[0078] - SIB1(-R)-PDCCH: PDCCH carrying SIB1(-R)-DCI

[0079] - FDRA: Frequency Domain Resource Allocation

[0080] - TDRA: Time Domain Resource Allocation

[0081] - RA: Random Access

[0082] - MSGA: preamble and payload transmissions of the random access procedure for 2-step RA type.

[0083] - MSGB: response to MSGA in the 2-step random access procedure. MSGB consistmay of response(s) for contention resolution, fallback indication(s), and backoff indication.

[0084] - RO-N: RO (RACH Occasion) for normal UE 4-step RACH and 2-step RACH (if configured)

[0085] - RO-N1,RO-N2: If separate RO is configured for normal UE 2-step RACH, it is divided into RO-N1 (4-step) and RO-N2 (2-step).

[0086] - RO-R: RO (RACH Occasion) configured separately from RO-N for redcapUE 4-step RACH and 2-step RACH (if configured)

[0087] - RO-R1, RO-R2: If separate RO is configured for redcap UE 2-step RACH, it is divided into RO-R1 (4-step) and RO-R2 (2-step).

[0088] - PG-R: MsgA-Preambles Group for redcap UEs

[0089] - RAR: Randoma Access Response

[0090] - RAR window: the time window to monitor RA response(s)

[0091] - FH: Frequency Hopping

[0092] - iBWP: initial BWP

[0093] - iBWP-DL(-UL): initial DL(UL) BWP

[0094] - iBWP-DL(-UL)-R: (separate) initial DL(UL) BWP for RedCap

[0095] - CS: Cyclic shift

[0096] - NB: Narrowband

[0097] - TO: Traffic Offloading

[0098] -mTC; massive Machine Type Communications

[0099] - eMBB: enhanced Mobile Broadband Communication

[0100] - URLLC: Ultra-Reliable and Low Latency Communication

[0101] - RedCap: Reduced Capability

[0102] - eRedCap: enhanced RedCap

[0103] - FDD: Frequency Division Duplex

[0104] - HD-FDD: Half-Duplex-FDD

[0105] - DRX: Discontinuous Reception

[0106] - RRC: Radio Resource Control

[0107] - RRM: Radio Resource Management

[0108] - IWSN: Industrial Wireless Sensor Network

[0109] - LPWA: Low Power Wide Area

[0110] - RB: Resource Block

[0111] - CCE: Control Channel Element

[0112] - AL: Aggregation Level

[0113] - PRG: Physical Resource-block Group

[0114] - DFT-S-OFDM: DFT-spread OFDM

[0115] -PBCH: Physical Broadcast Channel

[0116] - A-PBCH: Additional PBCH

[0117] - BD: blind detection

[0118] - EPRE: Energy Per RE

[0119] - SNR: Signal-to-Noise Ratio

[0120] - TDM: Time Division Multiplexing

[0121] - DMRS: DeModulation Reference Signal

[0122] - TDD: Time Division Duplex

[0123] - PCI: Physical layer Cell ID

[0124] Proposed method of the present disclosure In this disclosure, "()" can be interpreted to mean both excluding the content within the parentheses and including the content within the parentheses.

[0125] In this disclosure, " / " can mean either the inclusion of all of the content separated by the / (and) or the inclusion of only a portion of the separated content (or).

[0126] Compared to previous generation wireless communication systems (e.g., LTE and GSM), the 5G wireless communication system is characterized by its effective support of use cases such as mMTC, eMBB, and URLLC. Due to these advantages, the 5G wireless communication system is expected to gradually replace previous generation wireless communication systems for various use cases while creating new use cases. The improved characteristics of the 5G wireless communication system, such as low latency, high reliability, and massive connection, can be applied to use cases supported by existing narrowband (NB) (hereinafter referred to as NB use cases), as follows:

[0127] [Narrowband-based use cases (NB use cases)]

[0128] 1) Railway mobile communication

[0129] 2) Utility / Infrastructure Network

[0130] 3) Radio communications for public safety

[0131] Such NB use cases were previously supported with a bandwidth of approximately 3 MHz in a frequency band below 1 GHz using previous generation wireless communication systems. Similarly, when trying to support the above NB use cases in a 5G wireless communication system, for example, it can be supported with a similar frequency bandwidth (approximately 3 MHz or less than 5 MHz) in the same frequency band (below 1 GHz). However, since the minimum channel BW currently supported by the 5G NR standard is 5 MHz, this first requires supporting a channel bandwidth of less than 5 MHz.

[0132] [5G NR frequency band examples for NB use case support (3GPP TS38.101-1)]

[0133] Table 2 below corresponds to Table 5.2-1: NR operating bands in FR1 in 3GPP TS38.101-1.

[0134] [Table 2]

[0135] [Example of channel BW definition below 5MHz for NB use case support]

[0136] Table 3 shows the maximum number of RBs (N RB ) is an example. To support the NB use case based on 5G NR, a 3 MHz UE channel BW and a maximum configurable RB number (NRB) of 15 are defined, and the resource utilization ratio (RU (%)) is displayed. Table 3 is an example of UE channel BW support of less than 5 MHz for NB use case support.

[0137] [Table 3]

[0138] In addition, for the newly defined UE channel BW of 3 MHz, considering the interference between adjacent channels and resource utilization, different N RB It is also possible to define and use values. Tables 4 and 5 are examples of UE channel BW support below 5 MHz for N B use case support.

[0139] [Table 4]

[0140] [Table 5]

[0141] The same value can be applied to both DL and UL, or UE channel BW / NRB can be supported separately for DL ​​and UL. In the latter case, for example, both DL and UL support the maximum NRB value in consideration of adjacent channel interference and resource utilization, but only UL can apply a value applicable to DFT precoding.

[0142] 4 is a diagram illustrating an example of an initial connection process in a system applicable to the present disclosure. Specifically, FIG. 4 illustrates an example of a DL signal / channel reception order in the initial connection process.

[0143] A 5G NR terminal can receive DL signals / channels in the order shown in Figure 4 during the initial connection process.

[0144] Details of the initial connection process have been described above. A conventional NR UE receives CORESET #0 information via the MIB transmitted on the PBCH and can receive the initial DL signal / channel via the CORESET #0 frequency band during the initial connection process. However, when operating in narrowband, the conventional method may be inefficient when considering the channel BW and CORESET #0 bandwidth that can be supported by the NR standard, as exemplified in Tables 3, 4, and 5.

[0145] In this disclosure, The following methods are proposed to support transmission / reception of DL signals / channels.

[0146] In this disclosure, narrowband, NB, and channel BW, NRB, and max transmission BW can be interpreted / applied interchangeably.

[0147] In this disclosure, broadcast signaling includes system information including SIB1, MIB, PBCH payload generated in the PHY layer in addition to the MIB, and a signaling method using the PBCH scrambling sequence and PBCH DMRS sequence initialization information.

[0148] PDCCH reception method To receive the SIB1-PDCCH in the narrowband, the UE can receive information about the CORESET#0 and Type0-PDCCH CSS set via the MIB transmitted via the PBCH. Currently, the CORESET#0 bandwidth supported by the NR standard is 24 PRBs (4.32 MHz) based on a 15 kHz SCS, which can exceed the narrowband channel BW exemplified in Tables H-1 and H-2. In this case, the base station can transmit only REs belonging to channel BW after remapping the PDCCH transmission REs to CORESET#0. That is, the base station can puncture the PDCCH transmission REs that exceed the channel BW and transmit the remaining portion.

[0149] The UE can receive PDCCH transmission REs within the channel BW assuming the above-mentioned base station operation (i.e., puncturing operation). That is, the UE can receive PDCCH transmission REs assuming that only some REs belonging to the channel BW are transmitted, rather than all PDCCH transmission REs remapped to the CORESET#0 bandwidth according to the NR standard. This may cause a loss in PDCCH reception coverage.

[0150] In order to recover the PDCCH reception coverage loss or to extend coverage, the base station can apply power boosting to the PDCCH transmitted to CORESET#0. Whether or not power boosting of the PDCCH transmitted to CORESET#0 is applicable may be determined according to the CORESET#0 BW, the channel BW, or the relationship between them, or the value may be set to be different. Such a power boosting value (for each CORESET#0 BW) may be predefined in the standard or may be signaled via broadcast signaling.

[0151] In the existing NR standard TS38.213, when a PDCCH transmitting CRC-scrambled DCI format 1_0 using SI-RNTI, P-RNTI, RA-RNTI, etc. is monitored via CORESET#0 as follows, the DMRS EPRE of the PDCCH is set to have a value in the range of -8 dB to 8 dB compared to the SSS EPRE. When the PDCCH is transmitted with power boosting, the power boosting value may be limited so that the PDCCH DMRS EPRE when power boosted satisfies the above condition. Alternatively, when power boosting is applied / configured, the DMRS EPRE of the PDCCH may be specified to have a value in the range of (8 + power boosting value) dB to (8 + power boosting value) dB compared to the SSS EPRE.

[0152] [Part of NR standard 3GPP TS38.213] … If the UE has not been provided dedicated higher layer parameters, the UE may assume that the ratio of PDCCH DMRS EPRE to SSS EPRE is within -8 dB and 8 dB when the UE monitors PDCCHs for a DCI format 1_0 with CRC scrambled by SI-RNTI, P-RNTI, or RA-RNTI, or for a DCI format 2_7. …

[0153] Alternatively, a new CORESET#0 setting can be added for narrowband transmission. As an example, the added / introduced CORESET#0 for narrowband transmission may have a bandwidth smaller or larger than the channel BW, but smaller than the conventional CORESET#0 bandwidth. For example, the following CORESET#0 setting can be added:

[0154] CORESET♯0 size = 12PRBs

[0155] (1-1) In this case, two OFDM symbols are used to support 12 REGs per OFDM symbol * 2 OFDM symbols = 24 REGs = 4 CCE AL.

[0156] (1-2) Or, using three OFDM symbols, 12 REGs per OFDM symbol * 3 OFDM symbols = 36 REGs = 6 CCE ALs can be supported.

[0157] CORESET♯0 size = 14PRBs

[0158] (2-1) In this case, 14 REGs per OFDM symbols * 3 OFDM symbols = 42 REGs = 7 CCE ALs can be supported using three OFDM symbols.

[0159] (3) CORESET♯0 size = 15PRBs

[0160] (3-1) In this case, 15 REGs per OFDM symbol * 3 OFDM symbols = 45 REGs = 7.5 CCE ALs can be supported using three OFDM symbols.

[0161] CORESET♯0 size = 16PRBs

[0162] (4-1) In this case, 16 REGs per OFDM symbol * 3 OFDM symbols = 48 REGs = 8 CCE ALs can be supported using three OFDM symbols.

[0163] In the case of CORESET#0 size = 16 PRBs, if the channel BW is smaller than 16, PDCCH remapping is performed based on CORESET#0 size = 16 PRBs, and then the portion exceeding the channel BW can be punctured and transmitted. Puncturing can be performed on the highest PRB index of the CORESET#0 band or on the low PRB index, and such a puncturing method can be predefined in the standard or broadcast signaled.

[0164] Initial DL BWP In Figure 4, after receiving the PBCH, subsequent DL channels / signals are received via the initial DL BWP. In a narrowband wireless communication system, the initial DL BWP can be determined in the following manner.

[0165] CORESET♯0 BW is determined / used by the initial DL BWP According to the existing NR standard, even in a narrowband wireless communication system, a DL channel / signal can be received via CORESET#0 BW before a separate initial DL BWP is configured or during the initial access process. Alternatively, before a separate initial DL BWP is configured or during the initial access process, CORESET#0 BW can be assumed to be the initial DL BWP and operation can be performed using the initial DL BWP.

[0166] [Example] (1) In order to support a method of determining / using CORESET#0 BW in the initial DL BWP in a narrowband wireless communication system, for example, CORESET#0 having a bandwidth of 12 PRBs can be supported. In this case, the BW of CORESET#0 and the BW of the initial DL BWP are both 12 PRBs, and CORESET#0 can be configured with 2 OFDM symbols to support up to 4 CCE ALs, or configured with 3 OFDM symbols to newly support / introduce 6 CCE ALs.

[0167] (2) Alternatively, COREST#0BW can be set to have the following relationship as shown in (21).

[0168] (2-1) CORESET♯0 BW = initial DL BWP BW = channel BW

[0169] (3) As another example, if the channel BW is 15 PRB, CORESET#0 BW can be set to the same 15 PRB, and CORESET#0 can be configured with 2 OFDM symbols to support 4 CCE ALS, or with 3 OFDM symbols to support 7 CCE ALS, or with 4 OFDM symbols to support 10 CCE ALS. This method may be intended to use CORESET#0 BW as widely as possible, taking into account the initial DL BWP.

[0170] [SIB1 transmission method] At this time, the SIB1 PDSCH can be scheduled within the initialDL BWP, that is, the CORESET#0 BW.

[0171] [How to set up Initial DL BWP]

[0172] The initial DL BWP is determined by CORESET#0-related settings. CORESET#0-related setting parameters can be configured via the MIB transmitted via the PBCH. For example, as specified in the NR standard TS38.213, the BW and number of OFDM symbols for CORESET#0 can be configured via controlResourceSetZero in pdcch-ConfigSIB1 included in the MIB.

[0173] How to determine / set initial DL BWP separately / independently from CORESET#0BW Alternatively, a separate initialDL BWP can be determined / set separately / independently from CORESET#0 for a narrowband wireless communication system. The BW of the initialDL BWP set separately / independently from CORESET#0 BW can be determined / set to have the following relationship with CORESET#0 BW:

[0174] [Method #1] Set the BW of the Initial DL BWP to be larger than the BW of CORESET♯0 The bandwidth of the initial DL BWP can be set to be larger than the bandwidth of CORESET#0. In this case, the initial DL BWP can be set to include the bandwidth of CORESET#0. For example, if the channel bandwidth is 14 PRB in a narrowband, or if this is set, the CORESET#0 BW can be set to 12 PRB so that it belongs to the channel bandwidth, and the initial DL BWP can be set to 14 PRB, the same as the channel bandwidth.

[0175] [Table 6]

[0176] [Method #2] Set the BW of the Initial DL BWP to be smaller than the BW of CORESET♯0

[0177] The BW of the initial DL BWP can be set to be smaller than the CORESET#0 BW. In this case, the initial DL BWP can be set to include part of the CORESET#0 band. For example, if the channel BW is 12 PRB in a narrowband or is set in this way, the CORESET#0 BW can be set to 24 PRB, and the initial DL BWP can be determined / set to the lowest or highest 12 PRB of CORESET#0.

[0178] This method can be used to support the reuse of CORESET#0 supported by the conventional NR standard in a narrowband wireless communication system. In the case of Method #2, the DL channel / signal transmitted via the initialDL BWP including the SIB1 PDSCH can be scheduled within the initialDL BWP, and therefore the FDRA field of the DCI scheduling the PDSCH transmitted in the initialDL BWP can be determined based on the BW of the initialDL BWP (12 PRB in the above example).

[0179] [Table 7]

[0180] Alternatively, in the case of method #2, the DL channel / signal transmitted via the initial DL BWP including the SIB1 PDSCH can be scheduled within the CORESET#0 BW, and in this case the FDRA field of the DCI scheduling the PDSCH transmitted in the initial DL BWP can be determined based on the CORESET#0 BW (24 PRB in the above example) as specified in the existing NR standard.

[0181] [Method #3] How to set the BW of Initial DL BWP to the same as CORESET #0 BW

[0182] The BW of the initial DL BWP can be set to the same as the CORESET#0 BW. This method is the same as the previously proposed method of determining / using the CORESET#0 BW as the initial DL BWP. In the case of 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.

[0183] [Method #4] How to set the Initial DL BWP to include part of CORESET #0 The initial DL BWP can be configured to include part of CORESET #0. For example, if the SSB and CORESET #0 cannot be received entirely or simultaneously within the channel BW, the base station can configure the SSB or only the PSS / SSS within the SSB to be included entirely within the channel BW, and only part of CORESET #0 can be configured to be included within the channel BW regardless of its size. In this case, if the initial DL BWP is configured to be included within the channel BW, a configuration such as method #4 can be expected. Method #4 can be used to reuse the CORESET #0 configuration supported in the existing NR standard. In this case, the base station / terminal may not be able to transmit / receive the entire PDCCH, which may result in PDCCH reception coverage loss.

[0184] Method #4 may include defining the initialDL BWP as the maximum transmission BW. In this case, the terminal can assume the maximum transmission BW to be the initialDL BWP during the initial connection process. This definition / assumption is applicable only in the narrowband or when the CORESET#0 BW exceeds the channel BW in the narrowband.

[0185] Further, method #4 may 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 only be applied in a narrowband or when the CORESET#0 BW exceeds the channel BW in a narrowband. If the maximum transmission BW is smaller than the PBCH BW, only a subset of the PBCH transmission RBs may be transmitted 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, when some of the PBCH transmission RBs are punctured for transmission, the PBCH BW "used for actual PBCH transmission after puncturing," or the "punctured" PBCH BW, may be assumed to be the initial DL BWP. This may be intended to eliminate UE complexity issues and effects on reception coverage that may occur due to puncturing or partial reception within the initial DL BWP assumed by the UE in this situation.

[0186] FIG. 5 is a diagram illustrating an example of an initial DL BWP in a system applicable to the present disclosure.

[0187] Figure 5 shows an example of a case where a base station / terminal defines / assumes the initial DL BWP as a (punctured) PBCH BW when assuming channel BW=16PRB and CORESET#0BW=24PRB. Figure 5 shows an example of the initial DL BWP proposed in Method #4.

[0188] FIG. 6 is a diagram illustrating an example of an initialDL BWP in a system applicable to the present disclosure.

[0189] Method #4 can be applied to reserve DL transmission resources via the initial DL BWP when the CORESET#0 BW is excessively small compared to the channel BW, for example, when the channel BW is set to 16 RBs but the CORESET#0 BW is 12 RBs, or when a portion of the CORESET#0 BW is included in the channel BW and the CORESET#0 BW included in the channel BW is smaller than a specific value (for example, 12 RBs or less). Figure 6 shows an example in which the base station / terminal defines / assumes the initial DL BWP as a (punctured) PBCH BW, assuming channel BW = 16 PRBs and CORESET#0 BW = 12 PRBs.

[0190] [How to set the Initial DL BWP separately / independently] When the initial DL BWP is set separately / independently from the CORESET#0 BW, the initial DL BWP can be set by broadcast signaling.

[0191] Alternatively, the frequency location of the initial DL BWP may be determined as a relative frequency location / offset value based on the SSB / PSS / SSS / CORESET#0 frequency location, and this value may be predefined or broadcast in the NR standard. The bandwidth of the initial DL BWP may be predefined or broadcast in the NR standard. Alternatively, it may 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 stage, the base station / terminal may assume that the BW of the initial DL BWP is the same as the channel BW. This determination / setting method is expected to minimize signaling overhead when the entire narrowband is used as the initial DL BWP.

[0192] [Terminal claim related explanation] The above-described embodiment will now be described in detail from the viewpoint of the operation of a terminal with reference to Figure 7. The methods described below are divided for the convenience of explanation, and it goes without saying that some components of one method may be substituted for some components of another method, or may be applied in combination with each other, unless they are mutually exclusive.

[0193] FIG. 7 is a diagram illustrating an example of an operation process of a terminal (user equipment, UE) in a system applicable to the present disclosure.

[0194] In step S710, the terminal receives a master information block (MIB) from a base station (BS) including configuration information related to the total number of contiguous resource blocks for control resource set #0 (CORESET #0).

[0195] In step S720, the terminal receives a physical downlink control channel (PDCCH) associated with system information block 1 (SIB1) from the base station via CORESET#0, which includes second resource blocks excluding the first resource block among the resource blocks, based on i) the total number of resource blocks and ii) a channel bandwidth. Puncturing of a specific number of first resource blocks among the resource blocks is assumed.

[0196] In step S730, the UE receives a physical downlink shared channel (PDSCH) associated with the SIB1 from the base station via an initial downlink bandwidth part (DL BWP) based on the PDCCH.

[0197] Based on the puncturing of the first resource blocks, the initial DL BWP is defined by the number of the second resource blocks constituting the CORESET #0 and the positions of the second resource blocks.

[0198] According to various embodiments of the present disclosure, if the bandwidth based on the number of resource blocks exceeds the channel bandwidth, the PDCCH may be received via the second resource block corresponding to a bandwidth smaller than the channel bandwidth.

[0199] According to various embodiments of the present disclosure, the first resource block may be the specific number of resource blocks having the highest resource block index among the resource blocks.

[0200] 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.

[0201] 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.

[0202] According to various embodiments of the present disclosure, the initial DL BWP may be defined by the positions and number of contiguous resource blocks starting from the resource block with the lowest index among the second resource blocks constituting the CORESET #0 and ending with the resource block with the highest index among the second resource blocks.

[0203] According to various embodiments of the present disclosure, the CORESET#0 may be associated with a Type0-PDCCH CSS set (Type0-PDCCH common search space set).

[0204] According to various embodiments of the present disclosure, there is provided a terminal in a wireless communication system, the terminal including a transceiver and at least one processor, the at least one processor being configured to perform the method of operating the terminal according to FIG.

[0205] According to various embodiments of the present disclosure, there is provided an apparatus for controlling a terminal in a communication system, the apparatus including at least one processor and at least one memory operatively connected to the at least one processor, the at least one memory being configured to store instructions for performing the method of operating a terminal according to FIG.

[0206] According to various embodiments of the present disclosure, one or more non-transitory computer readable media (CRM) are provided that store one or more instructions that, when executed by the one or more processors, perform operations, which may include the method of operating a terminal according to FIG.

[0207] [Explanation regarding base station claims] Hereinafter, the above-described embodiment will be described in detail from the viewpoint of the operation of a base station with reference to Fig. 8. The methods described below are separated for the sake of convenience of explanation, and it goes without saying that, unless mutually exclusive, some configurations of any one method may be substituted for some configurations of another method, or may be applied in combination with each other.

[0208] FIG. 8 is a diagram showing an example of an operation process of a base station (BS) in a system applicable to the present disclosure.

[0209] In step S810, the base station transmits to the terminal (user equipment, UE) a master information block (MIB) including configuration information related to the total number of contiguous resource blocks for CORESET#0 (control resource set #0).

[0210] In step S820, the base station transmits a physical downlink control channel (PDCCH) associated with system information block 1 (SIB1) to the terminal via CORESET#0 consisting of second resource blocks excluding the first resource block among the resource blocks based on i) the total number of resource blocks and ii) a channel bandwidth. A specific number of first resource blocks among the resource blocks are punctured.

[0211] In step S830, the base station transmits a physical downlink shared channel (PDSCH) associated with the SIB1 to the terminal via an initial downlink bandwidth part (initial downlink BWP) based on the PDCCH. Based on the puncturing of the first resource blocks, the initial DL BWP is defined by the number of second resource blocks constituting the CORESET #0 and the positions of the second resource blocks.

[0212] According to various embodiments of the present disclosure, if the bandwidth based on the number of resource blocks exceeds the channel bandwidth, the PDCCH may be transmitted via the second resource block corresponding to a bandwidth smaller than the channel bandwidth.

[0213] According to various embodiments of the present disclosure, the first resource block may be the specific number of resource blocks having the highest resource block index among the resource blocks.

[0214] 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.

[0215] According to various embodiments of the present disclosure, the total number of resource blocks is 24, and the number of second resource blocks may be 15 if the channel bandwidth is 3 MHz.

[0216] According to various embodiments of the present disclosure, the initial DL BWP may be defined by the positions and number of contiguous resource blocks starting from the resource block with the lowest index among the second resource blocks constituting the CORESET #0 and ending with the resource block with the highest index among the second resource blocks.

[0217] According to various embodiments of the present disclosure, the CORESET#0 may be associated with a Type0-PDCCH CSS set (Type0-PDCCH common search space set).

[0218] According to various embodiments of the present disclosure, there is provided a base station in a wireless communication system, the base station including a transceiver and at least one processor, the at least one processor being configured to perform the method of operating a base station according to FIG.

[0219] According to various embodiments of the present disclosure, there is provided an apparatus for controlling a base station in a wireless communication system, the apparatus including at least one processor and at least one memory operatively connected to the at least one processor, the at least one memory being configured to store instructions for performing the method of operating a base station according to FIG.

[0220] According to various embodiments of the present disclosure, one or more non-transitory computer readable media (CRM) are provided that store one or more instructions, the one or more instructions being executed by the one or more processors to perform operations, which may include a method of operating a base station according to FIG.

[0221] Wireless devices applicable to the present disclosure In the following, examples of wireless devices to which various embodiments of the present disclosure may be applied are described.

[0222] FIG. 9 is a diagram showing an example of the structure of a first device and a second device in a system applicable to the present disclosure.

[0223] The first device 1600 may include a processor 1610, an antenna unit 1620, a transceiver 1630, and a memory 1640.

[0224] The processor 1610 performs baseband-related signal processing and may include an upper layer processing unit 1611 and a physical layer processing unit 1615. The upper layer processing unit 1611 may process operations of the MAC layer, the RRC layer, or higher layers. The physical layer processing unit 1615 may process operations of the PHY layer. For example, when the first device 1600 is a base station device in base station-terminal communication, the physical layer processing unit 1615 may perform uplink reception signal processing, downlink transmission signal processing, etc. For example, when the first device 1600 is a first terminal device in terminal-terminal communication, the physical layer processing unit 1615 may perform downlink reception signal processing, uplink transmission signal processing, sidelink transmission signal processing, etc. In addition to performing baseband-related signal processing, the processor 1610 may also control the operation of the entire first device 1600.

[0225] The antenna unit 1620 may include one or more physical antennas, and when multiple antennas are included, it may support MIMO transmission and reception. The transceiver 1630 may include an RF (Radio Frequency) transmitter and an RF receiver. The memory 1640 may store information processed by the processor 1610, as well as software, an operating system, applications, etc. related to the operation of the first device 1600, and may also include components such as buffers.

[0226] The processor 1610 of the first device 1600 may be configured to implement the operation of a base station in base station-terminal communication (or the operation of a first terminal device in terminal-terminal communication) in the embodiments described in this disclosure.

[0227] The second device 1650 may include a processor 1660, an antenna unit 1670, a transceiver 1680, and a memory 1690.

[0228] The processor 1660 performs baseband-related signal processing and may include an upper layer processing unit 1661 and a physical layer processing unit 1665. The upper layer processing unit 1661 may process operations of the MAC layer, the RRC layer, or higher layers. The physical layer processing unit 1665 may process operations of the PHY layer. For example, if the second device 1650 is a terminal device in base station-terminal communication, the physical layer processing unit 1665 may perform downlink reception signal processing, uplink transmission signal processing, etc. For example, if the second device 1650 is a second terminal device in terminal-terminal communication, the physical layer processing unit 1665 may perform downlink reception signal processing, uplink transmission signal processing, sidelink reception signal processing, etc. In addition to performing baseband-related signal processing, the processor 1660 may also control the operation of the entire second device 1660.

[0229] The antenna unit 1670 may include one or more physical antennas, and when multiple antennas are included, may support MIMO transmission and reception. The transceiver 1680 may include an RF transmitter and an RF receiver. The memory 1690 may store information processed by the processor 1660, as well as software, an operating system, applications, etc. related to the operation of the second device 1650, and may also include components such as buffers.

[0230] The processor 1660 of the second device 1650 may be configured to implement the operation of a terminal in base station-terminal communication (or the operation of a second terminal device in terminal-terminal communication) in the embodiments described in this disclosure.

[0231] In the operation of the first device 1600 and the second device 1650, the matters described in the examples of the present disclosure regarding the base station and terminal in base station-terminal communication (or the first terminal and second terminal in terminal-terminal communication) can be similarly applied, and duplicated explanations will be omitted.

[0232] Here, wireless communication technologies implemented by the devices 1600 and 1650 of the present disclosure may include LTE, NR, and 6G, as well as Narrowband Internet of Things (NB-IoT) for low-power communication. For example, the 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, and is not limited to the aforementioned names.

[0233] Additionally or alternatively, the wireless communication technology implemented in the devices 1600, 1650 of the present disclosure may implement 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 in at least one of various standards such as, but not limited to, 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.

[0234] Additionally or alternatively, the wireless communication technology implemented in the devices 1600, 1650 of the present disclosure may include, but is not limited to, at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN), which allow for low-power communication. For example, ZigBee technology can create personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and may be referred to by various names.

[0235] The claims set forth 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 to realize an apparatus, and the technical features of the device claims of the various embodiments of the present disclosure may be combined to realize a method. Furthermore, the technical features of the method claims and the technical features of the device claims of the various embodiments of the present disclosure may be combined to realize an apparatus, and the technical features of the method claims and the technical features of the device claims of the various embodiments of the present disclosure may be combined to realize a method.

[0236] [Claims at the time of international application] [Claim 1] 1. A method of operating a terminal (user equipment: UE) in a wireless communication system, comprising: receiving, from a base station (BS), a master information block (MIB) including configuration information related to the total number of contiguous resource blocks for a control resource set #0 (CORESET #0); i) receiving a physical downlink control channel (PDCCH) associated with system information block 1 (SIB1) from the base station via CORESET#0 consisting of second resource blocks excluding the first resource block among the resource blocks based on the total number of resource blocks and ii) a channel bandwidth; and Puncturing is assumed for a specific number of first resource blocks among the resource blocks; receiving a physical downlink shared channel (PDSCH) associated with the SIB1 from the base station via an initial downlink bandwidth part (initial DL BWP) based on the PDCCH; The method of claim 1, wherein the initial DL BWP is defined by the number of second resource blocks constituting the CORESET#0 and the positions of the second resource blocks based on puncturing for the first resource blocks. [Claim 2] The method of claim 1 , wherein if a bandwidth based on the number of resource blocks exceeds the channel bandwidth, the PDCCH is received via the second resource block corresponding to a bandwidth smaller than the channel bandwidth. [Claim 3] The method of claim 1 , wherein the first resource block is the particular number of resource blocks having the highest resource block index among the resource blocks. [Claim 4] the total number of resource blocks is 24; The method of claim 1 , wherein the channel bandwidth is 3 MHz or 5 MHz. [Claim 5] The method of claim 4, wherein the number of second resource blocks is 15 when the total number of resource blocks is 24 and the channel bandwidth is 3 MHz. [Claim 6] 2. The method of claim 1, wherein the initial IDL BWP is defined by the positions and number of contiguous resource blocks starting from a resource block having the lowest index among the second resource blocks constituting the CORESET#0 and ending with a resource block having the highest index among the second resource blocks. [Claim 7] The method of claim 1 , wherein the CORESET#0 is associated with a Type0-PDCCH common search space set (CSS). [Claim 8] 1. A method of operating a base station (BS) in a wireless communication system, comprising: transmitting a master information block (MIB) including configuration information related to the total number of contiguous resource blocks for CORESET #0 (control resource set #0) to a user equipment (UE); i) transmitting a physical downlink control channel (PDCCH) associated with system information block 1 (SIB1) to the terminal via CORESET#0 consisting of second resource blocks excluding the first resource block among the resource blocks based on the total number of resource blocks and ii) a channel bandwidth; and puncturing a specific number of first resource blocks among the resource blocks; transmitting a physical downlink shared channel (PDSCH) associated with the SIB1 to the terminal via an initial downlink bandwidth part (initial DL BWP) based on the PDCCH; The method of claim 1, wherein the initial DL BWP is defined by the number of second resource blocks constituting the CORESET#0 and the positions of the second resource blocks based on puncturing for the first resource blocks. [Claim 9] The method of claim 8, wherein if the bandwidth based on the number of resource blocks exceeds a channel bandwidth, the PDCCH is transmitted via the second resource block corresponding to a bandwidth smaller than the channel bandwidth. [Claim 10] The method of claim 8 , wherein the first resource block is the particular number of resource blocks having the highest resource block index among the resource blocks. [Claim 11] the total number of resource blocks is 24; The method of claim 8, wherein the channel bandwidth is 3 MHz or 5 MHz. [Claim 12] 12. The method of claim 11, wherein the number of second resource blocks is 15 when the total number of resource blocks is 24 and the channel bandwidth is 3 MHz. [Claim 13] 9. The method of claim 8, wherein the initial DL BWP is defined by the positions and number of contiguous resource blocks starting from a resource block having the lowest index among the second resource blocks constituting the CORESET #0 and ending with a resource block having the highest index among the second resource blocks. [Claim 14] The method of claim 8, wherein the CORESET#0 is associated with a Type0-PDCCH common search space set (CSS). [Claim 15] A terminal (user equipment: UE) in a wireless communication system, Transceiver; At least one processor; at least one memory operatively connected to said at least one processor and storing instructions that, when executed by said at least one processor, perform operations; A terminal, wherein the operations include all steps of the method according to any one of claims 1 to 7. [Claim 16] A base station (BS) in a wireless communication system, Transceiver; At least one processor; at least one memory operatively connected to said at least one processor and storing instructions for performing operations when executed by said at least one processor; A base station, wherein the operations include all steps of the method according to any one of claims 8 to 14. [Claim 17] A control device for controlling a terminal (user equipment: UE) in a wireless communication system, At least one processor; at least one memory operatively connected to said at least one processor; the at least one memory stores instructions that perform operations upon being executed by the at least one processor; The control device, wherein the operations include all steps of the method according to any one of claims 1 to 7. [Claim 18] A control device for controlling a base station (BS) in a wireless communication system, At least one processor; at least one memory operatively connected to said at least one processor; the at least one memory stores instructions that perform operations upon being executed by the at least one processor; The control device, wherein the operations include all steps of the method according to any one of claims 8 to 14. [Claim 19] one or more non-transitory computer-readable media storing one or more instructions, the one or more instructions perform operations upon being executed by one or more processors; A computer-readable medium, wherein the operations include all steps of the method according to any one of claims 1 to 7. [Claim 20] one or more non-transitory computer-readable media storing one or more instructions, the one or more instructions perform operations upon being executed by one or more processors; A computer-readable medium, wherein the operations include all steps of the method according to any one of claims 8 to 14.

Claims

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

2. The method of claim 1 , wherein, when a bandwidth based on the number of resource blocks exceeds the channel bandwidth, the PDCCH is received via the second resource block corresponding to a bandwidth smaller than the channel bandwidth.

3. The method of claim 1 , wherein the first resource block is the particular number of resource blocks having the highest resource block index among the resource blocks.

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

5. The method of claim 4 , wherein the number of second resource blocks is 15 when the total number of resource blocks is 24 and the channel bandwidth is 3 MHz.

6. 2. The method of claim 1, wherein the initial IDL BWP is defined by the positions and number of contiguous resource blocks starting from a resource block having the lowest index among the second resource blocks constituting the CORESET #0 and ending with a resource block having the highest index among the second resource blocks.

7. The method of claim 1 , wherein the CORESET #0 is associated with a Type 0-PDCCH CSS set (Type 0-PDCCH common search space set).

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

9. The method of claim 8, wherein, when the bandwidth based on the number of resource blocks exceeds a channel bandwidth, the PDCCH is transmitted via the second resource block corresponding to a bandwidth smaller than the channel bandwidth.

10. The method of claim 8 , wherein the first resource block is the particular number of resource blocks having the highest resource block index among the resource blocks.

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

12. The method of claim 11 , wherein the number of second resource blocks is 15 when the total number of resource blocks is 24 and the channel bandwidth is 3 MHz.

13. 9. The method of claim 8, wherein the initial DL BWP is defined by the positions and number of contiguous resource blocks starting from a resource block having the lowest index among the second resource blocks constituting the CORESET #0 and ending with a resource block having the highest index among the second resource blocks.

14. The method of claim 8, wherein the CORESET#0 is associated with a Type0-PDCCH CSS set (Type0-PDCCH common search space set).

15. A terminal (user equipment: UE) in a wireless communication system, Transceiver; at least one processor; at least one memory operatively connected to said at least one processor and storing instructions that, when executed by said at least one processor, perform operations; A terminal, wherein said operations include all steps of the method according to any one of claims 1 to 7.

16. A base station (BS) in a wireless communication system, Transceiver; at least one processor; at least one memory operatively connected to the at least one processor and storing instructions for performing operations when executed by the at least one processor; A base station, wherein said operations include all steps of the method according to any one of claims 8 to 14.

17. A control device for controlling a terminal (user equipment: UE) in a wireless communication system, comprising: at least one processor; at least one memory operatively connected to said at least one processor; the at least one memory stores instructions that perform operations upon being executed by the at least one processor; The control device, wherein the operations include all steps of the method according to any one of claims 1 to 7.

18. A control device for controlling a base station (BS) in a wireless communication system, comprising: at least one processor; at least one memory operatively connected to said at least one processor; the at least one memory stores instructions that perform operations upon being executed by the at least one processor; The control device, wherein the operations include 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; the one or more instructions perform operations upon being executed by one or more processors; A computer-readable medium, wherein the operations include 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; the one or more instructions perform operations upon being executed by one or more processors; A computer-readable medium, wherein the operations include all steps of the method according to any one of claims 8 to 14.

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